/* roulang page: index */
:root {
            --brand-blue: #1A3A5C;
            --brand-blue-light: #2C5F8A;
            --brand-red: #D9434E;
            --brand-red-dark: #B8323A;
            --brand-bg: #F9FAFB;
            --brand-card: #FFFFFF;
            --brand-border: #E5E7EB;
            --brand-gray: #F5F7FA;
            --brand-gray-light: #EBF0F5;
            --brand-dark: #1A1F2B;
            --brand-text: #1F2937;
            --brand-text-weak: #6B7280;
            --card-radius: 10px;
            --btn-radius: 6px;
            --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            line-height: 1.7;
            color: #1F2937;
            background-color: #F9FAFB;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header / Navigation */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid #E5E7EB;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.10);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            height: 64px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }

        .nav-logo {
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 700;
            color: #1A3A5C;
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
            text-align: center;
        }

        .nav-logo:hover {
            color: #2C5F8A;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: #4B5563;
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-link:hover {
            color: #1A3A5C;
            background-color: #F5F7FA;
        }

        .nav-link.active {
            color: #1A3A5C;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: #D9434E;
            border-radius: 1px;
        }

        .nav-cta {
            background: #D9434E;
            color: #FFFFFF;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .nav-cta:hover {
            background: #B8323A;
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(217, 67, 78, 0.3);
        }

        /* Mobile Menu */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: #1A3A5C;
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 20px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 16px;
            border-radius: 8px;
            text-align: center;
        }

        /* Section base */
        .section {
            padding: 60px 0;
        }

        .section-sm {
            padding: 40px 0;
        }

        .section-lg {
            padding: 80px 0;
        }

        /* Hero */
        .hero-section {
            background: linear-gradient(135deg, #F0F4F8 0%, #E8EEF4 40%, #F5F7FA 100%);
            position: relative;
            overflow: hidden;
            padding: 70px 0 80px;
            min-height: 520px;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(44, 95, 138, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(217, 67, 78, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-bg-dots {
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background-image: radial-gradient(circle, rgba(26, 58, 92, 0.08) 1px, transparent 1px);
            background-size: 24px 24px;
            pointer-events: none;
            opacity: 0.7;
        }

        /* Card */
        .card {
            background: #FFFFFF;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            border: 1px solid #E5E7EB;
            transition: all var(--transition-fast);
            overflow: hidden;
        }

        .card:hover {
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
            transform: translateY(-2px);
        }

        .card-interactive {
            cursor: pointer;
        }

        /* Buttons */
        .btn-primary {
            display: inline-block;
            background: #D9434E;
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: center;
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: #B8323A;
            box-shadow: 0 6px 18px rgba(217, 67, 78, 0.3);
            transform: translateY(-1px);
            color: #FFFFFF;
        }

        .btn-secondary {
            display: inline-block;
            background: transparent;
            color: #1A3A5C;
            padding: 11px 26px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 15px;
            border: 1px solid #1A3A5C;
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: center;
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: #EBF0F5;
            border-color: #2C5F8A;
            color: #2C5F8A;
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #1A3A5C;
            font-weight: 500;
            font-size: 14px;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .btn-text:hover {
            color: #D9434E;
            gap: 10px;
        }

        .btn-text::after {
            content: '→';
            display: inline-block;
            transition: transform var(--transition-fast);
        }

        .btn-text:hover::after {
            transform: translateX(3px);
        }

        /* FAQ Accordion */
        .faq-item {
            border: 1px solid #E5E7EB;
            border-radius: 8px;
            margin-bottom: 10px;
            background: #FFFFFF;
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item.active {
            border-color: #C5CDD8;
            background: #FAFBFC;
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: #1F2937;
            background: none;
            border: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }

        .faq-question:hover {
            color: #1A3A5C;
        }

        .faq-arrow {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform var(--transition-fast);
            color: #6B7280;
        }

        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
            color: #D9434E;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
        }

        .faq-answer-inner {
            padding: 0 20px 18px 20px;
            font-size: 15px;
            color: #4B5563;
            line-height: 1.7;
        }

        /* Metric card */
        .metric-card {
            background: #FFFFFF;
            border-radius: 10px;
            padding: 24px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            border: 1px solid #E5E7EB;
            text-align: center;
            transition: all var(--transition-fast);
        }

        .metric-card:hover {
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
            transform: translateY(-2px);
        }

        .metric-value {
            font-size: 36px;
            font-weight: 700;
            color: #1A3A5C;
            line-height: 1.2;
        }

        .metric-value.accent {
            color: #D9434E;
        }

        .metric-label {
            font-size: 14px;
            color: #6B7280;
            margin-top: 6px;
        }

        /* Timeline */
        .timeline-item {
            position: relative;
            padding-left: 32px;
            padding-bottom: 28px;
            border-left: 2px solid #E5E7EB;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
            border-left-color: transparent;
        }

        .timeline-dot {
            position: absolute;
            left: -9px;
            top: 2px;
            width: 16px;
            height: 16px;
            background: #D9434E;
            border-radius: 50%;
            border: 3px solid #FFFFFF;
            box-shadow: 0 0 0 3px rgba(217, 67, 78, 0.2);
        }

        .timeline-dot.blue {
            background: #1A3A5C;
            box-shadow: 0 0 0 3px rgba(26, 58, 92, 0.2);
        }

        /* News list */
        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid #F0F1F3;
            transition: background var(--transition-fast);
        }

        .news-item:hover {
            background: #FAFBFC;
            border-radius: 6px;
            padding-left: 8px;
            padding-right: 8px;
            margin-left: -8px;
            margin-right: -8px;
        }

        .news-date {
            flex-shrink: 0;
            font-size: 13px;
            color: #9CA3AF;
            font-weight: 500;
            min-width: 85px;
            padding-top: 2px;
        }

        .news-content {
            flex: 1;
            min-width: 0;
        }

        .news-title {
            font-size: 16px;
            font-weight: 600;
            color: #1F2937;
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .news-summary {
            font-size: 14px;
            color: #6B7280;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Form */
        .form-input {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #D1D5DB;
            border-radius: 6px;
            font-size: 15px;
            color: #1F2937;
            background: #FFFFFF;
            transition: all var(--transition-fast);
            outline: none;
        }

        .form-input:focus {
            border-color: #1A3A5C;
            box-shadow: 0 0 0 3px rgba(26, 58, 92, 0.08);
        }

        .form-input::placeholder {
            color: #9CA3AF;
        }

        /* Footer */
        .site-footer {
            background: #1A1F2B;
            color: #CBD5E1;
            padding: 40px 0 30px;
            font-size: 14px;
        }

        .site-footer a {
            color: #CBD5E1;
            transition: color var(--transition-fast);
        }

        .site-footer a:hover {
            color: #FFFFFF;
            text-decoration: underline;
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin: 20px 0;
        }

        /* Fixed bottom CTA */
        .fixed-bottom-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: #1A3A5C;
            color: #FFFFFF;
            padding: 14px 20px;
            z-index: 998;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.2);
            transform: translateY(0);
            transition: transform var(--transition-smooth);
        }

        .fixed-bottom-cta.hidden {
            transform: translateY(100%);
        }

        .fixed-bottom-cta .btn-primary {
            background: #D9434E;
            padding: 10px 24px;
            font-size: 14px;
        }

        .fixed-bottom-cta .btn-primary:hover {
            background: #B8323A;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-left,
            .nav-right {
                gap: 2px;
            }
            .nav-link {
                font-size: 13px;
                padding: 6px 8px;
            }
            .nav-logo {
                font-size: 18px;
            }
            .section {
                padding: 40px 0;
            }
            .section-lg {
                padding: 60px 0;
            }
            .hero-section {
                padding: 50px 0 60px;
                min-height: auto;
            }
            .metric-value {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-container {
                justify-content: space-between;
                height: 56px;
            }
            .nav-logo {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
                font-size: 17px;
            }
            .hamburger-btn {
                display: flex;
                position: relative;
                z-index: 1001;
            }
            .nav-cta {
                display: none;
            }
            .nav-container .nav-cta-mobile {
                display: block;
            }
            .section {
                padding: 30px 0;
            }
            .section-lg {
                padding: 40px 0;
            }
            .hero-section {
                padding: 40px 0 50px;
                min-height: auto;
            }
            .container-main {
                padding-left: 16px;
                padding-right: 16px;
            }
            .metric-value {
                font-size: 24px;
            }
            .news-item {
                flex-direction: column;
                gap: 4px;
            }
            .news-date {
                min-width: auto;
            }
            .fixed-bottom-cta {
                flex-direction: column;
                gap: 10px;
                text-align: center;
                padding: 12px 16px;
                font-size: 13px;
            }
            .card {
                border-radius: 8px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 10px 20px;
                font-size: 14px;
            }
            .faq-question {
                font-size: 15px;
                padding: 14px 16px;
            }
            .faq-answer-inner {
                font-size: 14px;
                padding: 0 16px 14px 16px;
            }
            .site-footer {
                text-align: center;
                padding: 30px 0 80px;
            }
        }

        @media (max-width: 520px) {
            .hero-section {
                padding: 30px 0 40px;
            }
            .metric-value {
                font-size: 22px;
            }
            .section {
                padding: 24px 0;
            }
            .section-lg {
                padding: 32px 0;
            }
            .container-main {
                padding-left: 12px;
                padding-right: 12px;
            }
            h1 {
                font-size: 24px !important;
            }
            h2 {
                font-size: 20px !important;
            }
            h3 {
                font-size: 17px !important;
            }
            .btn-primary,
            .btn-secondary {
                padding: 10px 18px;
                font-size: 13px;
                width: 100%;
                text-align: center;
            }
            .card {
                padding: 16px !important;
            }
        }

/* roulang page: category1 */
:root {
            --brand-blue: #1A3A5C;
            --brand-blue-light: #2C5F8A;
            --brand-red: #D9434E;
            --brand-red-dark: #B8323A;
            --brand-bg: #F9FAFB;
            --brand-card: #FFFFFF;
            --brand-border: #E5E7EB;
            --brand-gray: #F5F7FA;
            --brand-gray-light: #EBF0F5;
            --brand-dark: #1A1F2B;
            --brand-text: #1F2937;
            --brand-text-weak: #6B7280;
            --card-radius: 10px;
            --btn-radius: 6px;
            --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            line-height: 1.7;
            color: #1F2937;
            background-color: #F9FAFB;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header / Navigation */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid #E5E7EB;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.10);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            height: 64px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }

        .nav-logo {
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 700;
            color: #1A3A5C;
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
            text-align: center;
        }

        .nav-logo:hover {
            color: #2C5F8A;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: #4B5563;
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-link:hover {
            color: #1A3A5C;
            background-color: #F5F7FA;
        }

        .nav-link.active {
            color: #1A3A5C;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: #D9434E;
            border-radius: 1px;
        }

        .nav-cta {
            background: #D9434E;
            color: #FFFFFF;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .nav-cta:hover {
            background: #B8323A;
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(217, 67, 78, 0.3);
        }

        /* Mobile Menu */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: #1A3A5C;
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 20px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 16px;
            border-radius: 8px;
            text-align: center;
        }

        /* Section base */
        .section {
            padding: 60px 0;
        }

        .section-sm {
            padding: 40px 0;
        }

        .section-lg {
            padding: 80px 0;
        }

        /* Hero - 白皮书获客风格 */
        .hero-whitepaper {
            background: linear-gradient(160deg, #F0F4F8 0%, #E6EDF5 30%, #F5F7FA 60%, #FFFFFF 100%);
            position: relative;
            overflow: hidden;
            padding: 60px 0 70px;
            min-height: 500px;
        }

        .hero-whitepaper::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -120px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(44, 95, 138, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-whitepaper::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(217, 67, 78, 0.04) 0%, transparent 70%);
            pointer-events: none;
        }

        .whitepaper-cover {
            background: #FFFFFF;
            border-radius: 12px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.10);
            overflow: hidden;
            position: relative;
            border: 1px solid #E5E7EB;
            max-width: 380px;
            margin: 0 auto;
        }

        .whitepaper-cover img {
            width: 100%;
            height: auto;
            display: block;
        }

        .whitepaper-cover-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: #D9434E;
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 700;
            padding: 6px 14px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            box-shadow: 0 4px 12px rgba(217, 67, 78, 0.35);
        }

        /* 课程卡片 */
        .course-card {
            background: #FFFFFF;
            border-radius: 10px;
            border: 1px solid #E5E7EB;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            transition: all var(--transition-fast);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .course-card:hover {
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
            transform: translateY(-2px);
            border-color: #D1D5DB;
        }

        .course-card-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }

        .course-card-body {
            padding: 22px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .course-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            background: #EBF0F5;
            color: #1A3A5C;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }

        .course-tag.hot {
            background: #FEF2F2;
            color: #D9434E;
        }

        .course-price {
            font-size: 22px;
            font-weight: 700;
            color: #1A3A5C;
        }

        .course-price-original {
            font-size: 14px;
            color: #9CA3AF;
            text-decoration: line-through;
            margin-left: 8px;
        }

        /* FAQ手风琴 */
        .faq-item {
            border: 1px solid #E5E7EB;
            border-radius: 8px;
            margin-bottom: 10px;
            background: #FFFFFF;
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #D1D5DB;
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 20px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: #1F2937;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            transition: background var(--transition-fast);
            line-height: 1.5;
        }

        .faq-question:hover {
            background: #F9FAFB;
        }

        .faq-arrow {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform var(--transition-smooth);
            color: #6B7280;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: #1A3A5C;
        }

        .faq-item.open .faq-question {
            background: #F5F7FA;
            color: #1A3A5C;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 15px;
            color: #4B5563;
            line-height: 1.7;
            margin: 0;
        }

        /* CTA表单区 */
        .cta-section {
            background: #1A3A5C;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -60px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(217, 67, 78, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .form-input-white {
            background: rgba(255, 255, 255, 0.95);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 6px;
            padding: 12px 16px;
            font-size: 15px;
            color: #1F2937;
            width: 100%;
            transition: all var(--transition-fast);
            outline: none;
        }

        .form-input-white:focus {
            border-color: #FFFFFF;
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
            background: #FFFFFF;
        }

        .form-input-white::placeholder {
            color: #9CA3AF;
        }

        .btn-red {
            background: #D9434E;
            color: #FFFFFF;
            border: none;
            padding: 12px 28px;
            border-radius: 6px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.3px;
        }

        .btn-red:hover {
            background: #B8323A;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(217, 67, 78, 0.35);
        }

        .btn-outline-blue {
            background: transparent;
            color: #1A3A5C;
            border: 1px solid #1A3A5C;
            padding: 10px 22px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-outline-blue:hover {
            background: #F0F4F8;
            border-color: #2C5F8A;
            color: #2C5F8A;
        }

        /* 页脚 */
        .site-footer {
            background: #1A1F2B;
            color: #FFFFFF;
            padding: 40px 0 24px;
        }

        .site-footer a {
            color: #D1D5DB;
            transition: color var(--transition-fast);
        }

        .site-footer a:hover {
            color: #FFFFFF;
            text-decoration: underline;
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            margin: 20px 0;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-left,
            .nav-right {
                gap: 2px;
            }
            .nav-link {
                font-size: 13px;
                padding: 6px 8px;
            }
            .nav-logo {
                font-size: 18px;
            }
            .hero-whitepaper {
                padding: 40px 0 50px;
                min-height: auto;
            }
            .section {
                padding: 40px 0;
            }
            .section-lg {
                padding: 50px 0;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-container {
                justify-content: space-between;
            }
            .nav-logo {
                order: 1;
                flex: 1;
                text-align: left;
                padding-left: 0;
            }
            .hamburger-btn {
                display: flex;
                order: 2;
            }
            .nav-cta {
                display: none;
            }
            .nav-container .nav-cta-desktop {
                display: none;
            }
            .hero-whitepaper {
                padding: 30px 0 40px;
            }
            .section {
                padding: 32px 0;
            }
            .section-lg {
                padding: 40px 0;
            }
            .course-card-image {
                height: 160px;
            }
            .whitepaper-cover {
                max-width: 260px;
            }
            h1 {
                font-size: 24px !important;
            }
            h2 {
                font-size: 20px !important;
            }
            h3 {
                font-size: 17px !important;
            }
            body {
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .nav-container {
                height: 56px;
                padding: 0 14px;
            }
            .nav-logo {
                font-size: 17px;
            }
            .mobile-menu {
                top: 56px;
            }
            .hero-whitepaper {
                padding: 24px 0 32px;
            }
            .section {
                padding: 24px 0;
            }
            .section-lg {
                padding: 32px 0;
            }
            .container-main {
                padding-left: 14px;
                padding-right: 14px;
            }
            .whitepaper-cover {
                max-width: 200px;
            }
            .course-card-image {
                height: 140px;
            }
            .form-input-white {
                font-size: 14px;
                padding: 10px 14px;
            }
            .btn-red {
                font-size: 14px;
                padding: 10px 20px;
            }
            h1 {
                font-size: 22px !important;
            }
            h2 {
                font-size: 18px !important;
            }
            h3 {
                font-size: 16px !important;
            }
        }

/* roulang page: category2 */
:root {
            --brand-blue: #1A3A5C;
            --brand-blue-light: #2C5F8A;
            --brand-red: #D9434E;
            --brand-red-dark: #B8323A;
            --brand-bg: #F9FAFB;
            --brand-card: #FFFFFF;
            --brand-border: #E5E7EB;
            --brand-gray: #F5F7FA;
            --brand-gray-light: #EBF0F5;
            --brand-dark: #1A1F2B;
            --brand-text: #1F2937;
            --brand-text-weak: #6B7280;
            --card-radius: 10px;
            --btn-radius: 6px;
            --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            line-height: 1.7;
            color: #1F2937;
            background-color: #F9FAFB;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header / Navigation */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid #E5E7EB;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.10);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            height: 64px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }

        .nav-logo {
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 700;
            color: #1A3A5C;
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
            text-align: center;
        }

        .nav-logo:hover {
            color: #2C5F8A;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: #4B5563;
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-link:hover {
            color: #1A3A5C;
            background-color: #F5F7FA;
        }

        .nav-link.active {
            color: #1A3A5C;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: #D9434E;
            border-radius: 1px;
        }

        .nav-cta {
            background: #D9434E;
            color: #FFFFFF;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .nav-cta:hover {
            background: #B8323A;
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(217, 67, 78, 0.3);
        }

        /* Mobile Menu */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: #1A3A5C;
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 20px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 16px;
            border-radius: 8px;
            text-align: center;
        }

        /* Section base */
        .section {
            padding: 60px 0;
        }

        .section-sm {
            padding: 40px 0;
        }

        .section-lg {
            padding: 80px 0;
        }

        /* Hero - 对比选型风格 */
        .hero-category {
            background: linear-gradient(160deg, #F0F4F8 0%, #E8EEF4 30%, #F5F7FA 60%, #FAFBFC 100%);
            position: relative;
            overflow: hidden;
            padding: 60px 0 70px;
            min-height: 480px;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -120px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(44, 95, 138, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-category::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -80px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(217, 67, 78, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        /* 高亮推荐卡片 */
        .highlight-card {
            background: #FFFFFF;
            border: 2px solid #D9434E;
            border-radius: 12px;
            padding: 28px 24px;
            box-shadow: 0 6px 28px rgba(217, 67, 78, 0.15);
            position: relative;
            transition: all var(--transition-smooth);
            z-index: 1;
        }

        .highlight-card::before {
            content: '推荐分析';
            position: absolute;
            top: -14px;
            left: 24px;
            background: #D9434E;
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            z-index: 2;
        }

        .highlight-card:hover {
            box-shadow: 0 10px 36px rgba(217, 67, 78, 0.22);
            transform: translateY(-3px);
        }

        /* 对比卡片 */
        .compare-card {
            background: #FFFFFF;
            border: 1px solid #E5E7EB;
            border-radius: 10px;
            padding: 20px 18px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
            transition: all var(--transition-smooth);
        }

        .compare-card:hover {
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.10);
            transform: translateY(-2px);
            border-color: #D1D5DB;
        }

        /* 战队档案卡片 - 非对称Grid */
        .team-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .team-card {
            background: #FFFFFF;
            border: 1px solid #E5E7EB;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            transition: all var(--transition-smooth);
            cursor: pointer;
            display: flex;
            flex-direction: column;
        }

        .team-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
            border-color: #D1D5DB;
        }

        .team-card.span-2-col {
            grid-column: span 2;
        }

        .team-card.span-2-row {
            grid-row: span 2;
        }

        .team-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            background: #F5F7FA;
        }

        .team-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .team-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .team-card .card-body {
            padding: 18px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .team-card .card-body.large-body {
            padding: 24px 20px;
            gap: 12px;
        }

        .team-badge {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 4px;
            letter-spacing: 0.3px;
        }

        .badge-s {
            background: #E8F4FD;
            color: #1A3A5C;
        }

        .badge-a {
            background: #FFF3E0;
            color: #E67E22;
        }

        .badge-b {
            background: #F5F7FA;
            color: #6B7280;
        }

        .badge-hot {
            background: #FDE8EA;
            color: #D9434E;
        }

        .stat-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: #6B7280;
        }

        .stat-row .stat-val {
            font-weight: 600;
            color: #1F2937;
            font-size: 15px;
        }

        .stat-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            margin-right: 6px;
        }

        .dot-up {
            background: #10B981;
        }

        .dot-down {
            background: #EF4444;
        }

        .dot-stable {
            background: #F59E0B;
        }

        /* 数据对比双栏 */
        .compare-table-wrap {
            overflow-x: auto;
            border-radius: 10px;
            border: 1px solid #E5E7EB;
            background: #FFFFFF;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }

        .compare-table thead th {
            background: #F5F7FA;
            padding: 14px 16px;
            font-size: 13px;
            font-weight: 600;
            color: #4B5563;
            text-align: left;
            border-bottom: 2px solid #E5E7EB;
            white-space: nowrap;
        }

        .compare-table tbody td {
            padding: 12px 16px;
            font-size: 14px;
            border-bottom: 1px solid #F3F4F6;
            color: #1F2937;
        }

        .compare-table tbody tr:hover {
            background: #FAFBFC;
        }

        .compare-table .highlight-row {
            background: #FFF8F8;
            font-weight: 600;
        }

        .compare-table .highlight-row:hover {
            background: #FFF3F3;
        }

        /* 流程步骤 */
        .step-list {
            display: flex;
            gap: 0;
            counter-reset: step;
            flex-wrap: wrap;
        }

        .step-item {
            flex: 1;
            min-width: 200px;
            padding: 28px 20px;
            position: relative;
            text-align: center;
            counter-increment: step;
            background: #FFFFFF;
            border: 1px solid #E5E7EB;
            border-radius: 10px;
            margin: 0 8px;
            transition: all var(--transition-smooth);
        }

        .step-item:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
            border-color: #D1D5DB;
        }

        .step-item::before {
            content: counter(step);
            display: block;
            width: 44px;
            height: 44px;
            line-height: 44px;
            margin: 0 auto 14px;
            background: #1A3A5C;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 18px;
            border-radius: 50%;
            text-align: center;
        }

        .step-item .step-arrow {
            position: absolute;
            right: -16px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 20px;
            color: #CBD5E1;
            z-index: 1;
        }

        .step-item:last-child .step-arrow {
            display: none;
        }

        /* FAQ 手风琴 */
        .faq-item {
            border: 1px solid #E5E7EB;
            border-radius: 8px;
            margin-bottom: 10px;
            background: #FFFFFF;
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #D1D5DB;
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: #1F2937;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-align: left;
            gap: 12px;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: #FAFBFC;
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            transition: transform var(--transition-smooth);
            color: #6B7280;
            font-size: 14px;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            color: #D9434E;
        }

        .faq-item.open .faq-question {
            color: #1A3A5C;
            background: #FAFBFC;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
        }

        .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: 14px;
            color: #4B5563;
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            background: #1A3A5C;
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -60px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30px;
            left: -40px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(217, 67, 78, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-form input {
            padding: 12px 16px;
            border-radius: 6px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.08);
            color: #FFFFFF;
            font-size: 14px;
            width: 100%;
            transition: all var(--transition-fast);
            outline: none;
        }

        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }

        .cta-form input:focus {
            border-color: rgba(255, 255, 255, 0.5);
            background: rgba(255, 255, 255, 0.14);
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.06);
        }

        .btn-primary {
            background: #D9434E;
            color: #FFFFFF;
            padding: 12px 24px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary:hover {
            background: #B8323A;
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(217, 67, 78, 0.35);
        }

        .btn-secondary {
            background: transparent;
            color: #1A3A5C;
            padding: 10px 20px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 14px;
            border: 1px solid #1A3A5C;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-secondary:hover {
            background: #F0F4F8;
            border-color: #2C5F8A;
            color: #2C5F8A;
        }

        .btn-text-link {
            color: #1A3A5C;
            font-weight: 500;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
        }

        .btn-text-link:hover {
            color: #D9434E;
            gap: 8px;
        }

        .btn-text-link i {
            transition: transform var(--transition-fast);
        }

        .btn-text-link:hover i {
            transform: translateX(3px);
        }

        /* Brand banner */
        .brand-banner {
            background: #EBF0F5;
            border-radius: 10px;
            padding: 36px 32px;
            position: relative;
            overflow: hidden;
        }

        .brand-banner::after {
            content: '';
            position: absolute;
            right: -40px;
            bottom: -40px;
            width: 160px;
            height: 160px;
            background: radial-gradient(circle, rgba(26, 58, 92, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        /* Footer */
        .site-footer {
            background: #1A1F2B;
            padding: 40px 0 24px;
            color: #FFFFFF;
        }

        .site-footer a {
            color: #CBD5E1;
            transition: color var(--transition-fast);
        }

        .site-footer a:hover {
            color: #FFFFFF;
            text-decoration: underline;
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            margin: 20px 0;
        }

        /* Section title */
        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: #1A3A5C;
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }

        .section-subtitle {
            font-size: 15px;
            color: #6B7280;
            margin-bottom: 32px;
            max-width: 600px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .team-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .team-card.span-2-col {
                grid-column: span 2;
            }
            .step-list {
                gap: 12px;
            }
            .step-item {
                flex: 0 0 calc(50% - 12px);
                min-width: 0;
                margin: 0;
            }
            .step-item .step-arrow {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .nav-container {
                justify-content: space-between;
                padding: 0 16px;
                height: 60px;
            }
            .nav-logo {
                font-size: 18px;
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }
            .team-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .team-card.span-2-col {
                grid-column: span 2;
            }
            .team-card.span-2-row {
                grid-row: span 1;
            }
            .hero-category {
                padding: 40px 0 50px;
                min-height: auto;
            }
            .section {
                padding: 40px 0;
            }
            .section-lg {
                padding: 50px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .highlight-card {
                padding: 20px 16px;
            }
            .compare-table {
                min-width: 560px;
                font-size: 12px;
            }
            .compare-table thead th,
            .compare-table tbody td {
                padding: 10px 12px;
                font-size: 12px;
            }
            .cta-form .flex {
                flex-direction: column;
            }
            .step-item {
                flex: 0 0 100%;
            }
            .brand-banner {
                padding: 24px 20px;
            }
        }

        @media (max-width: 520px) {
            .team-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .team-card.span-2-col {
                grid-column: span 1;
            }
            .team-card.span-2-row {
                grid-row: span 1;
            }
            .section-title {
                font-size: 20px;
            }
            .highlight-card::before {
                font-size: 10px;
                padding: 3px 10px;
                top: -12px;
                left: 16px;
            }
            .hero-category {
                padding: 30px 0 40px;
            }
            .cta-section {
                padding: 40px 0;
            }
            .site-footer {
                padding: 28px 0 18px;
            }
        }

/* roulang page: category3 */
:root {
            --brand-blue: #1A3A5C;
            --brand-blue-light: #2C5F8A;
            --brand-red: #D9434E;
            --brand-red-dark: #B8323A;
            --brand-bg: #F9FAFB;
            --brand-card: #FFFFFF;
            --brand-border: #E5E7EB;
            --brand-gray: #F5F7FA;
            --brand-gray-light: #EBF0F5;
            --brand-dark: #1A1F2B;
            --brand-text: #1F2937;
            --brand-text-weak: #6B7280;
            --card-radius: 10px;
            --btn-radius: 6px;
            --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            line-height: 1.7;
            color: #1F2937;
            background-color: #F9FAFB;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header / Navigation */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid #E5E7EB;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.10);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            height: 64px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }

        .nav-logo {
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 700;
            color: #1A3A5C;
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
            text-align: center;
        }

        .nav-logo:hover {
            color: #2C5F8A;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: #4B5563;
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-link:hover {
            color: #1A3A5C;
            background-color: #F5F7FA;
        }

        .nav-link.active {
            color: #1A3A5C;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: #D9434E;
            border-radius: 1px;
        }

        .nav-cta {
            background: #D9434E;
            color: #FFFFFF;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .nav-cta:hover {
            background: #B8323A;
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(217, 67, 78, 0.3);
        }

        /* Mobile Menu */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: #1A3A5C;
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 20px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 16px;
            border-radius: 8px;
            text-align: center;
        }

        /* Section base */
        .section {
            padding: 60px 0;
        }

        .section-sm {
            padding: 40px 0;
        }

        .section-lg {
            padding: 80px 0;
        }

        /* Hero - 训练营预告 */
        .hero-edu {
            background: linear-gradient(160deg, #F0F4F8 0%, #E3EBF3 30%, #F5F7FA 60%, #EBF0F5 100%);
            position: relative;
            overflow: hidden;
            padding: 60px 0 70px;
            min-height: 500px;
        }

        .hero-edu::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -120px;
            width: 450px;
            height: 450px;
            background: radial-gradient(circle, rgba(26, 58, 92, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-edu::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -80px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(217, 67, 78, 0.03) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-edu-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .hero-edu-badge {
            display: inline-block;
            background: #D9434E;
            color: #FFFFFF;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            animation: pulse-badge 2.5s ease-in-out infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(217, 67, 78, 0.35);
            }
            50% {
                box-shadow: 0 0 0 12px rgba(217, 67, 78, 0);
            }
        }

        .hero-edu-title {
            font-size: 34px;
            font-weight: 700;
            color: #1A3A5C;
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }

        .hero-edu-subtitle {
            font-size: 16px;
            color: #4B5563;
            line-height: 1.7;
            margin-bottom: 24px;
            max-width: 480px;
        }

        .countdown-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .countdown-item {
            background: #FFFFFF;
            border-radius: 10px;
            padding: 14px 18px;
            text-align: center;
            min-width: 70px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
            border: 1px solid #E5E7EB;
        }

        .countdown-num {
            font-size: 28px;
            font-weight: 700;
            color: #D9434E;
            line-height: 1;
            display: block;
        }

        .countdown-label {
            font-size: 12px;
            color: #6B7280;
            margin-top: 4px;
            display: block;
        }

        .hero-edu-visual {
            position: relative;
            z-index: 2;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.10);
            aspect-ratio: 16/10;
            background: #D9E2EC;
        }

        .hero-edu-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .btn-primary {
            display: inline-block;
            background: #D9434E;
            color: #FFFFFF;
            padding: 13px 28px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
            text-align: center;
        }

        .btn-primary:hover {
            background: #B8323A;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(217, 67, 78, 0.3);
            color: #FFFFFF;
        }

        .btn-outline {
            display: inline-block;
            background: transparent;
            color: #1A3A5C;
            padding: 12px 26px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 15px;
            border: 1.5px solid #1A3A5C;
            transition: all var(--transition-fast);
            cursor: pointer;
            text-align: center;
        }

        .btn-outline:hover {
            background: #EBF0F5;
            border-color: #2C5F8A;
            color: #2C5F8A;
        }

        /* Course Cards */
        .course-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .course-card {
            background: #FFFFFF;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            border: 1px solid #E5E7EB;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

        .course-card:hover {
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.12);
            transform: translateY(-3px);
            border-color: #CBD5E1;
        }

        .course-card-img {
            aspect-ratio: 16/9;
            background: #E2E8F0;
            overflow: hidden;
            position: relative;
        }

        .course-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .course-card:hover .course-card-img img {
            transform: scale(1.04);
        }

        .course-card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: #D9434E;
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            z-index: 2;
        }

        .course-card-body {
            padding: 20px 22px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .course-card-title {
            font-size: 18px;
            font-weight: 600;
            color: #1A3A5C;
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .course-card-desc {
            font-size: 14px;
            color: #6B7280;
            line-height: 1.6;
            margin-bottom: 12px;
            flex: 1;
        }

        .course-card-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: #4B5563;
            margin-bottom: 10px;
            align-items: center;
        }

        .course-card-meta span {
            background: #F5F7FA;
            padding: 4px 10px;
            border-radius: 4px;
            white-space: nowrap;
        }

        .course-card-price {
            font-size: 22px;
            font-weight: 700;
            color: #D9434E;
            margin-bottom: 4px;
        }

        .course-card-price small {
            font-size: 13px;
            font-weight: 400;
            color: #6B7280;
        }

        .course-card-footer {
            padding: 0 22px 18px;
            display: flex;
            gap: 10px;
        }

        .course-card-footer .btn-primary {
            flex: 1;
            padding: 10px 16px;
            font-size: 14px;
            text-align: center;
        }

        /* Coach Section */
        .coach-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .coach-card {
            background: #FFFFFF;
            border-radius: 12px;
            padding: 24px 20px;
            text-align: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            border: 1px solid #E5E7EB;
            transition: all var(--transition-smooth);
        }

        .coach-card:hover {
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.10);
            transform: translateY(-2px);
        }

        .coach-avatar {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            margin: 0 auto 14px;
            overflow: hidden;
            background: #E2E8F0;
            border: 3px solid #EBF0F5;
        }

        .coach-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .coach-name {
            font-size: 17px;
            font-weight: 600;
            color: #1A3A5C;
            margin-bottom: 2px;
        }

        .coach-title-tag {
            font-size: 13px;
            color: #D9434E;
            font-weight: 500;
            margin-bottom: 6px;
        }

        .coach-desc {
            font-size: 13px;
            color: #6B7280;
            line-height: 1.5;
        }

        /* Pathway */
        .pathway-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            position: relative;
        }

        .pathway-step {
            text-align: center;
            position: relative;
            padding: 20px 16px;
        }

        .pathway-step::after {
            content: '';
            position: absolute;
            top: 40px;
            right: -12px;
            width: 28px;
            height: 2px;
            background: #CBD5E1;
        }

        .pathway-step:last-child::after {
            display: none;
        }

        .pathway-step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: #1A3A5C;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 20px;
            margin-bottom: 12px;
            position: relative;
            z-index: 2;
        }

        .pathway-step.active .pathway-step-num {
            background: #D9434E;
        }

        .pathway-step-title {
            font-size: 15px;
            font-weight: 600;
            color: #1A3A5C;
            margin-bottom: 4px;
        }

        .pathway-step-desc {
            font-size: 13px;
            color: #6B7280;
            line-height: 1.5;
        }

        /* Comparison */
        .compare-table-wrap {
            overflow-x: auto;
            border-radius: 12px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            border: 1px solid #E5E7EB;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background: #FFFFFF;
            min-width: 600px;
        }

        .compare-table th {
            background: #1A3A5C;
            color: #FFFFFF;
            padding: 14px 18px;
            font-weight: 600;
            font-size: 14px;
            text-align: left;
        }

        .compare-table td {
            padding: 12px 18px;
            font-size: 14px;
            border-bottom: 1px solid #F0F0F0;
            color: #4B5563;
        }

        .compare-table tr:hover td {
            background: #FAFBFC;
        }

        .compare-table .highlight-cell {
            color: #D9434E;
            font-weight: 600;
        }

        /* Brand Intro */
        .brand-intro-bar {
            background: #EBF0F5;
            border-radius: 12px;
            padding: 36px 40px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .brand-intro-bar h3 {
            font-size: 22px;
            font-weight: 700;
            color: #1A3A5C;
            margin-bottom: 10px;
        }

        .brand-intro-bar p {
            font-size: 15px;
            color: #4B5563;
            line-height: 1.8;
        }

        .brand-intro-bar .intro-visual {
            border-radius: 10px;
            overflow: hidden;
            aspect-ratio: 16/10;
            background: #D9E2EC;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
        }

        .brand-intro-bar .intro-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #FFFFFF;
            border-radius: 10px;
            margin-bottom: 10px;
            border: 1px solid #E5E7EB;
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #CBD5E1;
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 16px 20px;
            font-size: 16px;
            font-weight: 600;
            color: #1A3A5C;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-align: left;
            line-height: 1.4;
        }

        .faq-arrow {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform var(--transition-smooth);
            color: #6B7280;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: #D9434E;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 20px;
            font-size: 15px;
            color: #4B5563;
            line-height: 1.7;
            background: #FAFBFC;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 12px 20px 18px;
        }

        .faq-item.open {
            border-color: #CBD5E1;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }

        /* CTA Section */
        .cta-section {
            background: #1A3A5C;
            padding: 56px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .cta-text h2 {
            font-size: 28px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }

        .cta-text p {
            font-size: 15px;
            color: #CBD5E1;
            line-height: 1.7;
        }

        .cta-form {
            background: #FFFFFF;
            border-radius: 12px;
            padding: 28px 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: flex-end;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }

        .cta-form .form-group {
            flex: 1;
            min-width: 140px;
        }

        .cta-form label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: #4B5563;
            margin-bottom: 4px;
        }

        .cta-form input,
        .cta-form select {
            width: 100%;
            padding: 10px 12px;
            border: 1.5px solid #E5E7EB;
            border-radius: 6px;
            font-size: 14px;
            color: #1F2937;
            background: #FAFBFC;
            transition: border-color var(--transition-fast);
            box-sizing: border-box;
        }

        .cta-form input:focus,
        .cta-form select:focus {
            outline: none;
            border-color: #1A3A5C;
            background: #FFFFFF;
            box-shadow: 0 0 0 3px rgba(26, 58, 92, 0.06);
        }

        .cta-form .btn-primary {
            flex-shrink: 0;
            padding: 11px 24px;
            font-size: 14px;
            white-space: nowrap;
        }

        /* Footer */
        .site-footer {
            background: #1A1F2B;
            color: #FFFFFF;
            padding: 40px 0 28px;
            font-size: 14px;
        }

        .site-footer a {
            color: #CBD5E1;
            transition: color var(--transition-fast);
        }

        .site-footer a:hover {
            color: #FFFFFF;
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            margin: 20px 0;
        }

        /* Section titles */
        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: #1A3A5C;
            margin-bottom: 8px;
            letter-spacing: -0.2px;
        }

        .section-subtitle {
            font-size: 15px;
            color: #6B7280;
            margin-bottom: 32px;
            line-height: 1.6;
        }

        .section-header {
            text-align: center;
            margin-bottom: 36px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-edu-content {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-edu-visual {
                aspect-ratio: 16/8;
                max-height: 300px;
            }
            .course-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .coach-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pathway-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .pathway-step::after {
                display: none;
            }
            .brand-intro-bar {
                grid-template-columns: 1fr;
                padding: 28px 24px;
            }
            .cta-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .nav-left,
            .nav-right {
                gap: 2px;
            }
            .nav-link {
                font-size: 13px;
                padding: 6px 8px;
            }
            .nav-logo {
                font-size: 17px;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .nav-container {
                justify-content: space-between;
            }
            .nav-logo {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }
            .hero-edu-title {
                font-size: 26px;
            }
            .hero-edu {
                padding: 40px 0 50px;
                min-height: auto;
            }
            .course-grid {
                grid-template-columns: 1fr;
                max-width: 420px;
                margin: 0 auto;
            }
            .coach-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .pathway-steps {
                grid-template-columns: 1fr;
                max-width: 320px;
                margin: 0 auto;
            }
            .section-title {
                font-size: 22px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form .form-group {
                min-width: 100%;
            }
            .countdown-item {
                min-width: 55px;
                padding: 10px 12px;
            }
            .countdown-num {
                font-size: 22px;
            }
            .compare-table th,
            .compare-table td {
                padding: 8px 10px;
                font-size: 12px;
            }
            .section {
                padding: 40px 0;
            }
            .brand-intro-bar {
                padding: 20px 16px;
            }
            .brand-intro-bar h3 {
                font-size: 18px;
            }
            .brand-intro-bar p {
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .coach-grid {
                grid-template-columns: 1fr;
                max-width: 280px;
                margin: 0 auto;
            }
            .hero-edu-title {
                font-size: 22px;
            }
            .hero-edu-subtitle {
                font-size: 14px;
            }
            .countdown-row {
                gap: 8px;
            }
            .countdown-item {
                min-width: 48px;
                padding: 8px 10px;
            }
            .countdown-num {
                font-size: 18px;
            }
            .countdown-label {
                font-size: 10px;
            }
            .btn-primary,
            .btn-outline {
                padding: 10px 18px;
                font-size: 13px;
            }
            .section-title {
                font-size: 20px;
            }
            .course-card-title {
                font-size: 16px;
            }
            .course-card-body {
                padding: 14px 16px 10px;
            }
            .course-card-footer {
                padding: 0 16px 14px;
                flex-direction: column;
            }
        }

/* roulang page: category4 */
:root {
            --brand-blue: #1A3A5C;
            --brand-blue-light: #2C5F8A;
            --brand-red: #D9434E;
            --brand-red-dark: #B8323A;
            --brand-bg: #F9FAFB;
            --brand-card: #FFFFFF;
            --brand-border: #E5E7EB;
            --brand-gray: #F5F7FA;
            --brand-gray-light: #EBF0F5;
            --brand-dark: #1A1F2B;
            --brand-text: #1F2937;
            --brand-text-weak: #6B7280;
            --card-radius: 10px;
            --btn-radius: 6px;
            --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            line-height: 1.7;
            color: #1F2937;
            background-color: #F9FAFB;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header / Navigation */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid #E5E7EB;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.10);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            height: 64px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }

        .nav-logo {
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 700;
            color: #1A3A5C;
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
            text-align: center;
        }

        .nav-logo:hover {
            color: #2C5F8A;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: #4B5563;
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-link:hover {
            color: #1A3A5C;
            background-color: #F5F7FA;
        }

        .nav-link.active {
            color: #1A3A5C;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: #D9434E;
            border-radius: 1px;
        }

        .nav-cta {
            background: #D9434E;
            color: #FFFFFF;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .nav-cta:hover {
            background: #B8323A;
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(217, 67, 78, 0.3);
        }

        /* Mobile Menu */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: #1A3A5C;
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 20px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 16px;
            border-radius: 8px;
            text-align: center;
        }

        /* Section base */
        .section {
            padding: 60px 0;
        }

        .section-sm {
            padding: 40px 0;
        }

        .section-lg {
            padding: 80px 0;
        }

        /* Page Banner */
        .page-banner {
            background: linear-gradient(135deg, #1A3A5C 0%, #1F4460 30%, #1A3A5C 60%, #152D47 100%);
            position: relative;
            overflow: hidden;
            padding: 60px 0 64px;
            color: #FFFFFF;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -120px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -80px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(217, 67, 78, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-banner .banner-content {
            position: relative;
            z-index: 1;
        }

        /* Article Card */
        .article-card {
            background: #FFFFFF;
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            border: 1px solid var(--brand-border);
            transition: all var(--transition-smooth);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
        }

        .article-card.featured {
            flex-direction: row;
            min-height: 280px;
        }

        .article-card .article-img-wrap {
            flex-shrink: 0;
            overflow: hidden;
            position: relative;
        }

        .article-card .article-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .article-card:hover .article-img-wrap img {
            transform: scale(1.04);
        }

        .article-card .article-body {
            padding: 20px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-card .article-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: #D9434E;
            background: #FEF2F2;
            padding: 3px 10px;
            border-radius: 4px;
            margin-bottom: 10px;
            width: fit-content;
            letter-spacing: 0.3px;
        }

        .article-card .article-date {
            font-size: 13px;
            color: #9CA3AF;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-card .article-date::before {
            content: '';
            display: inline-block;
            width: 6px;
            height: 6px;
            background: #D1D5DB;
            border-radius: 50%;
        }

        .article-card .article-title {
            font-size: 18px;
            font-weight: 700;
            color: #1F2937;
            margin-bottom: 8px;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }

        .article-card:hover .article-title {
            color: #1A3A5C;
        }

        .article-card .article-excerpt {
            font-size: 14px;
            color: #6B7280;
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            font-weight: 600;
            color: #1A3A5C;
            margin-top: 12px;
            transition: all var(--transition-fast);
            width: fit-content;
        }

        .article-card .read-more:hover {
            color: #D9434E;
            gap: 8px;
        }

        .article-card .read-more svg {
            width: 16px;
            height: 16px;
            transition: transform var(--transition-fast);
        }

        .article-card .read-more:hover svg {
            transform: translateX(3px);
        }

        /* Sidebar */
        .sidebar-card {
            background: #FFFFFF;
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            border: 1px solid var(--brand-border);
            padding: 24px;
            margin-bottom: 24px;
        }

        .sidebar-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: #1F2937;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid #F3F4F6;
            position: relative;
        }

        .sidebar-card h3::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 36px;
            height: 2px;
            background: #D9434E;
            border-radius: 1px;
        }

        .sidebar-card .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .sidebar-card .tag-item {
            font-size: 13px;
            padding: 6px 14px;
            border-radius: 20px;
            background: #F5F7FA;
            color: #4B5563;
            transition: all var(--transition-fast);
            cursor: pointer;
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .sidebar-card .tag-item:hover {
            background: #EBF0F5;
            color: #1A3A5C;
            border-color: #D1D5DB;
        }

        .sidebar-card .mini-article {
            display: flex;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid #F3F4F6;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .sidebar-card .mini-article:last-child {
            border-bottom: none;
        }

        .sidebar-card .mini-article:hover {
            background: #FAFBFC;
            margin: 0 -10px;
            padding-left: 10px;
            padding-right: 10px;
            border-radius: 6px;
        }

        .sidebar-card .mini-article .mini-img {
            width: 60px;
            height: 60px;
            border-radius: 6px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .sidebar-card .mini-article .mini-info h4 {
            font-size: 13px;
            font-weight: 600;
            color: #1F2937;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .sidebar-card .mini-article .mini-info span {
            font-size: 11px;
            color: #9CA3AF;
            margin-top: 4px;
            display: block;
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .pagination .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 500;
            color: #4B5563;
            background: #FFFFFF;
            border: 1px solid #E5E7EB;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .pagination .page-btn:hover {
            background: #F5F7FA;
            border-color: #D1D5DB;
            color: #1A3A5C;
        }

        .pagination .page-btn.active {
            background: #1A3A5C;
            color: #FFFFFF;
            border-color: #1A3A5C;
            font-weight: 700;
            box-shadow: 0 2px 8px rgba(26, 58, 92, 0.25);
        }

        .pagination .page-btn.disabled {
            opacity: 0.4;
            pointer-events: none;
            cursor: not-allowed;
        }

        .pagination .page-dots {
            padding: 0 4px;
            color: #9CA3AF;
            font-weight: 500;
        }

        /* FAQ Accordion */
        .faq-item {
            background: #FFFFFF;
            border: 1px solid #E5E7EB;
            border-radius: 8px;
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #D1D5DB;
        }

        .faq-question {
            width: 100%;
            padding: 18px 24px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: #1F2937;
            background: #FFFFFF;
            border: none;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            transition: background var(--transition-fast);
            line-height: 1.4;
        }

        .faq-question:hover {
            background: #FAFBFC;
        }

        .faq-question .faq-arrow {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform var(--transition-smooth);
            color: #9CA3AF;
        }

        .faq-item.open .faq-question .faq-arrow {
            transform: rotate(180deg);
            color: #D9434E;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            padding: 0 24px;
            font-size: 15px;
            color: #4B5563;
            line-height: 1.7;
            background: #FAFBFC;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 16px 24px 20px;
        }

        .faq-item.open {
            border-color: #D1D5DB;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(160deg, #1A3A5C 0%, #1F4460 35%, #1A3A5C 70%, #152D47 100%);
            color: #FFFFFF;
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(217, 67, 78, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        /* Footer */
        .site-footer {
            background: #1A1F2B;
            color: #D1D5DB;
            padding: 40px 0 24px;
            font-size: 14px;
        }

        .site-footer a {
            color: #9CA3AF;
            transition: color var(--transition-fast);
        }

        .site-footer a:hover {
            color: #FFFFFF;
        }

        .footer-divider {
            border-top: 1px solid #374151;
            margin: 20px 0;
        }

        /* Highlighted stats bar */
        .stats-bar {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            justify-content: center;
            background: #FFFFFF;
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            border: 1px solid var(--brand-border);
            padding: 24px 32px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .stat-item {
            text-align: center;
            flex: 1;
            min-width: 120px;
            padding: 8px 16px;
        }

        .stat-item .stat-number {
            font-size: 28px;
            font-weight: 700;
            color: #1A3A5C;
            line-height: 1.2;
        }

        .stat-item .stat-label {
            font-size: 13px;
            color: #6B7280;
            margin-top: 4px;
        }

        .stat-divider {
            width: 1px;
            background: #E5E7EB;
            flex-shrink: 0;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-card.featured {
                flex-direction: column;
                min-height: auto;
            }
            .article-card.featured .article-img-wrap {
                height: 200px;
            }
            .stats-bar {
                gap: 12px;
                padding: 16px 20px;
            }
            .stat-divider {
                display: none;
            }
            .stat-item {
                min-width: 80px;
                padding: 6px 10px;
            }
            .stat-item .stat-number {
                font-size: 22px;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-container {
                justify-content: space-between;
            }
            .hamburger-btn {
                display: flex;
            }
            .nav-logo {
                font-size: 18px;
            }
            .section {
                padding: 40px 0;
            }
            .section-lg {
                padding: 50px 0;
            }
            .page-banner {
                padding: 40px 0 44px;
            }
            .article-card .article-body {
                padding: 16px;
            }
            .article-card .article-title {
                font-size: 16px;
            }
            .stats-bar {
                flex-wrap: wrap;
                margin-top: -30px;
                padding: 16px;
                gap: 8px;
                border-radius: 8px;
            }
            .stat-item {
                flex: 0 0 calc(50% - 8px);
                min-width: auto;
            }
            .stat-item .stat-number {
                font-size: 20px;
            }
            .pagination .page-btn {
                min-width: 34px;
                height: 34px;
                font-size: 13px;
                padding: 0 8px;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 13px;
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 12px 16px 16px;
            }
            .sidebar-card {
                padding: 16px;
            }
            .cta-section {
                padding: 40px 0;
            }
        }

        @media (max-width: 520px) {
            .container-main {
                padding-left: 12px;
                padding-right: 12px;
            }
            .page-banner h1 {
                font-size: 22px;
            }
            .article-card .article-title {
                font-size: 15px;
            }
            .article-card .article-excerpt {
                font-size: 13px;
            }
            .stat-item .stat-number {
                font-size: 18px;
            }
            .stat-item .stat-label {
                font-size: 11px;
            }
            .pagination {
                gap: 3px;
            }
            .pagination .page-btn {
                min-width: 30px;
                height: 30px;
                font-size: 12px;
                padding: 0 6px;
            }
        }

/* roulang page: category5 */
:root {
            --brand-blue: #1A3A5C;
            --brand-blue-light: #2C5F8A;
            --brand-red: #D9434E;
            --brand-red-dark: #B8323A;
            --brand-bg: #F9FAFB;
            --brand-card: #FFFFFF;
            --brand-border: #E5E7EB;
            --brand-gray: #F5F7FA;
            --brand-gray-light: #EBF0F5;
            --brand-dark: #1A1F2B;
            --brand-text: #1F2937;
            --brand-text-weak: #6B7280;
            --card-radius: 10px;
            --btn-radius: 6px;
            --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            line-height: 1.7;
            color: #1F2937;
            background-color: #F9FAFB;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header / Navigation */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid #E5E7EB;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.10);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            height: 64px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }

        .nav-logo {
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 700;
            color: #1A3A5C;
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
            text-align: center;
        }

        .nav-logo:hover {
            color: #2C5F8A;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: #4B5563;
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-link:hover {
            color: #1A3A5C;
            background-color: #F5F7FA;
        }

        .nav-link.active {
            color: #1A3A5C;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: #D9434E;
            border-radius: 1px;
        }

        .nav-cta {
            background: #D9434E;
            color: #FFFFFF;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .nav-cta:hover {
            background: #B8323A;
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(217, 67, 78, 0.3);
        }

        /* Mobile Menu */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: #1A3A5C;
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 20px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 16px;
            border-radius: 8px;
            text-align: center;
        }

        /* Section base */
        .section {
            padding: 60px 0;
        }

        .section-sm {
            padding: 40px 0;
        }

        .section-lg {
            padding: 80px 0;
        }

        /* Hero - 品牌旗舰店风格 */
        .hero-shop {
            background: linear-gradient(160deg, #1A2D40 0%, #1A3A5C 30%, #1A3A5C 70%, #0F2235 100%);
            position: relative;
            overflow: hidden;
            padding: 60px 0 70px;
            min-height: 480px;
            color: #FFFFFF;
        }

        .hero-shop::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(217, 67, 78, 0.08);
            pointer-events: none;
        }

        .hero-shop::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(44, 95, 138, 0.12);
            pointer-events: none;
        }

        .hero-shop .hero-bg-pattern {
            position: absolute;
            inset: 0;
            opacity: 0.04;
            background-image: radial-gradient(circle, #ffffff 1px, transparent 1px);
            background-size: 28px 28px;
            pointer-events: none;
        }

        .hero-shop-content {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 20px;
        }

        .hero-shop-tag {
            display: inline-block;
            background: rgba(217, 67, 78, 0.2);
            color: #FCA5A5;
            border: 1px solid rgba(217, 67, 78, 0.4);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.5px;
        }

        .hero-shop h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: 0.5px;
            max-width: 700px;
            color: #FFFFFF;
        }

        .hero-shop-subtitle {
            font-size: 16px;
            color: #CBD5E1;
            max-width: 560px;
            line-height: 1.6;
        }

        .hero-series-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            justify-content: center;
            margin-top: 8px;
        }

        .hero-series-tag {
            padding: 10px 20px;
            border-radius: 24px;
            font-size: 14px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.07);
            color: #E2E8F0;
            border: 1px solid rgba(255, 255, 255, 0.15);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .hero-series-tag:hover,
        .hero-series-tag.active-tag {
            background: rgba(217, 67, 78, 0.35);
            border-color: #D9434E;
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(217, 67, 78, 0.3);
        }

        .hero-shop-cta {
            display: inline-block;
            background: #D9434E;
            color: #FFFFFF;
            padding: 14px 36px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.5px;
            transition: all var(--transition-fast);
            margin-top: 8px;
            border: none;
            cursor: pointer;
        }

        .hero-shop-cta:hover {
            background: #B8323A;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(217, 67, 78, 0.4);
        }

        /* 产品卡片 */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .product-card {
            background: #FFFFFF;
            border-radius: 10px;
            border: 1px solid #E5E7EB;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            overflow: hidden;
            transition: all var(--transition-smooth);
            cursor: pointer;
            position: relative;
            display: flex;
            flex-direction: column;
        }

        .product-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.14);
            border-color: #CBD5E1;
        }

        .product-card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 4/3;
            background: #F5F7FA;
        }

        .product-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .product-card:hover .product-card-img-wrap img {
            transform: scale(1.06);
        }

        .product-badge {
            position: absolute;
            top: 10px;
            left: 10px;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 11px;
            font-weight: 600;
            z-index: 2;
            letter-spacing: 0.3px;
        }

        .badge-hot {
            background: #D9434E;
            color: #FFFFFF;
        }

        .badge-new {
            background: #1A3A5C;
            color: #FFFFFF;
        }

        .badge-sale {
            background: #F59E0B;
            color: #1F2937;
        }

        .product-card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .product-card-name {
            font-size: 15px;
            font-weight: 600;
            color: #1F2937;
            line-height: 1.4;
        }

        .product-card-desc {
            font-size: 13px;
            color: #6B7280;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .product-stars {
            display: flex;
            align-items: center;
            gap: 2px;
            font-size: 14px;
            color: #F59E0B;
        }

        .product-stars .score-num {
            font-size: 12px;
            color: #6B7280;
            margin-left: 4px;
        }

        .product-price {
            font-size: 18px;
            font-weight: 700;
            color: #D9434E;
            letter-spacing: 0.3px;
        }

        .product-price .price-unit {
            font-size: 13px;
            font-weight: 500;
        }

        .product-price .price-sep {
            font-size: 13px;
            color: #9CA3AF;
            font-weight: 400;
            margin: 0 4px;
        }

        /* 套装卡片 */
        .bundle-card {
            background: #FFFFFF;
            border-radius: 12px;
            border: 1px solid #E5E7EB;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
            padding: 28px 24px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .bundle-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.10);
            border-color: #CBD5E1;
        }

        .bundle-card.recommended {
            border-color: #D9434E;
            box-shadow: 0 4px 20px rgba(217, 67, 78, 0.08);
        }

        .bundle-badge-rec {
            position: absolute;
            top: 0;
            right: 0;
            background: #D9434E;
            color: #FFFFFF;
            padding: 6px 16px;
            border-radius: 0 12px 0 12px;
            font-size: 12px;
            font-weight: 600;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid #E5E7EB;
            border-radius: 8px;
            margin-bottom: 10px;
            overflow: hidden;
            background: #FFFFFF;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #CBD5E1;
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: #1F2937;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-align: left;
            gap: 12px;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: #F9FAFB;
        }

        .faq-arrow {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform var(--transition-smooth);
            color: #6B7280;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: #D9434E;
        }

        .faq-item.open .faq-question {
            color: #1A3A5C;
            background: #F9FAFB;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: #4B5563;
            line-height: 1.7;
            margin: 0;
        }

        /* CTA Section */
        .cta-section {
            background: #1A3A5C;
            padding: 60px 0;
            color: #FFFFFF;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            pointer-events: none;
        }

        .cta-form-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: flex-end;
        }

        .cta-input {
            flex: 1;
            min-width: 180px;
            padding: 12px 16px;
            border-radius: 6px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.08);
            color: #FFFFFF;
            font-size: 14px;
            transition: all var(--transition-fast);
            outline: none;
        }

        .cta-input::placeholder {
            color: #94A3B8;
        }

        .cta-input:focus {
            border-color: #D9434E;
            background: rgba(255, 255, 255, 0.14);
            box-shadow: 0 0 0 3px rgba(217, 67, 78, 0.2);
        }

        .cta-btn {
            background: #D9434E;
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: 6px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            white-space: nowrap;
            transition: all var(--transition-fast);
            letter-spacing: 0.4px;
        }

        .cta-btn:hover {
            background: #B8323A;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(217, 67, 78, 0.4);
        }

        /* Footer */
        .site-footer {
            background: #1A1F2B;
            padding: 40px 0 24px;
            color: #FFFFFF;
        }

        .site-footer a {
            color: #9CA3AF;
            transition: color var(--transition-fast);
        }

        .site-footer a:hover {
            color: #FFFFFF;
            text-decoration: underline;
        }

        .footer-divider {
            border-top: 1px solid #374151;
            margin: 20px 0;
        }

        /* 筛选标签 */
        .filter-tag {
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid #D1D5DB;
            background: #FFFFFF;
            color: #4B5563;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-tag:hover,
        .filter-tag.active-filter {
            background: #1A3A5C;
            color: #FFFFFF;
            border-color: #1A3A5C;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .product-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .hero-shop h1 {
                font-size: 30px;
            }
            .hero-series-nav {
                gap: 6px;
            }
            .hero-series-tag {
                padding: 8px 14px;
                font-size: 12px;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-container {
                justify-content: space-between;
            }
            .nav-logo {
                order: 1;
                flex: 1;
                text-align: left;
                padding-left: 0;
            }
            .hamburger-btn {
                display: flex;
                order: 2;
            }
            .nav-container {
                padding: 0 16px;
            }
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .hero-shop {
                padding: 40px 0 50px;
                min-height: auto;
            }
            .hero-shop h1 {
                font-size: 26px;
            }
            .hero-shop-subtitle {
                font-size: 14px;
            }
            .hero-series-tag {
                padding: 7px 12px;
                font-size: 11px;
            }
            .hero-shop-cta {
                padding: 12px 28px;
                font-size: 14px;
            }
            .section {
                padding: 40px 0;
            }
            .cta-form-row {
                flex-direction: column;
            }
            .cta-input {
                min-width: 100%;
            }
            .product-card-body {
                padding: 12px 14px 14px;
            }
            .product-card-name {
                font-size: 13px;
            }
            .product-price {
                font-size: 15px;
            }
            .filter-tag {
                padding: 6px 12px;
                font-size: 11px;
            }
        }

        @media (max-width: 520px) {
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .hero-shop h1 {
                font-size: 22px;
            }
            .hero-series-nav {
                gap: 4px;
            }
            .hero-series-tag {
                padding: 6px 10px;
                font-size: 10px;
                border-radius: 16px;
            }
            .product-card-body {
                padding: 10px 10px 12px;
            }
            .product-card-name {
                font-size: 12px;
            }
            .product-price {
                font-size: 14px;
            }
            .product-stars {
                font-size: 11px;
            }
        }

/* roulang page: category6 */
:root {
            --brand-blue: #1A3A5C;
            --brand-blue-light: #2C5F8A;
            --brand-red: #D9434E;
            --brand-red-dark: #B8323A;
            --brand-bg: #F9FAFB;
            --brand-card: #FFFFFF;
            --brand-border: #E5E7EB;
            --brand-gray: #F5F7FA;
            --brand-gray-light: #EBF0F5;
            --brand-dark: #1A1F2B;
            --brand-text: #1F2937;
            --brand-text-weak: #6B7280;
            --card-radius: 10px;
            --btn-radius: 6px;
            --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            line-height: 1.7;
            color: #1F2937;
            background-color: #F9FAFB;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid #E5E7EB;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.10);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            height: 64px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }

        .nav-logo {
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 700;
            color: #1A3A5C;
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
            text-align: center;
        }

        .nav-logo:hover {
            color: #2C5F8A;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: #4B5563;
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-link:hover {
            color: #1A3A5C;
            background-color: #F5F7FA;
        }

        .nav-link.active {
            color: #1A3A5C;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: #D9434E;
            border-radius: 1px;
        }

        .nav-cta {
            background: #D9434E;
            color: #FFFFFF;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .nav-cta:hover {
            background: #B8323A;
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(217, 67, 78, 0.3);
        }

        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: #1A3A5C;
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 20px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 16px;
            border-radius: 8px;
            text-align: center;
        }

        .section {
            padding: 60px 0;
        }

        .section-sm {
            padding: 40px 0;
        }

        .section-lg {
            padding: 80px 0;
        }

        .hero-community {
            background: linear-gradient(160deg, #F0F4F8 0%, #E4ECF3 30%, #F5F7FA 60%, #EDF2F7 100%);
            position: relative;
            overflow: hidden;
            padding: 60px 0 70px;
            min-height: 440px;
        }

        .hero-community::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(26, 58, 92, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-community::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(217, 67, 78, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .card-topic {
            background: #FFFFFF;
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            border: 1px solid var(--brand-border);
            overflow: hidden;
            transition: all var(--transition-smooth);
            cursor: pointer;
            break-inside: avoid;
            display: flex;
            flex-direction: column;
        }

        .card-topic:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
            border-color: #CBD5E1;
        }

        .card-topic-img {
            width: 100%;
            object-fit: cover;
            display: block;
        }

        .card-topic-body {
            padding: 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-topic-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 20px;
            margin-bottom: 10px;
            width: fit-content;
            letter-spacing: 0.3px;
        }

        .tag-hot {
            background: #FEF2F2;
            color: #D9434E;
        }

        .tag-new {
            background: #EFF6FF;
            color: #2C5F8A;
        }

        .tag-active {
            background: #F0FDF4;
            color: #16A34A;
        }

        .tag-featured {
            background: #FFF7ED;
            color: #EA580C;
        }

        .card-topic-title {
            font-size: 17px;
            font-weight: 600;
            color: #1F2937;
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .card-topic-desc {
            font-size: 13px;
            color: #6B7280;
            line-height: 1.5;
            flex: 1;
        }

        .card-topic-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: #9CA3AF;
            margin-top: 12px;
            padding-top: 10px;
            border-top: 1px solid #F3F4F6;
        }

        .masonry-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            grid-auto-rows: 140px;
            grid-auto-flow: dense;
        }

        .masonry-grid .card-topic {
            grid-row: span 2;
        }

        .masonry-grid .card-topic.span-3 {
            grid-row: span 3;
        }

        .masonry-grid .card-topic.span-4 {
            grid-row: span 4;
        }

        .masonry-grid .card-topic.span-col-2 {
            grid-column: span 2;
        }

        .faq-item {
            background: #FFFFFF;
            border: 1px solid #E5E7EB;
            border-radius: 8px;
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #CBD5E1;
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: #1F2937;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            line-height: 1.4;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: #FAFBFC;
        }

        .faq-arrow {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform var(--transition-smooth);
            position: relative;
        }

        .faq-arrow::before,
        .faq-arrow::after {
            content: '';
            position: absolute;
            background: #6B7280;
            transition: all var(--transition-smooth);
        }

        .faq-arrow::before {
            width: 12px;
            height: 2px;
            top: 9px;
            left: 4px;
            border-radius: 1px;
        }

        .faq-arrow::after {
            width: 2px;
            height: 12px;
            left: 9px;
            top: 4px;
            border-radius: 1px;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-item.open .faq-arrow::after {
            opacity: 0;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 20px;
            font-size: 15px;
            color: #4B5563;
            line-height: 1.7;
            background: #FAFBFC;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 16px 20px 20px;
        }

        .cta-section {
            background: #1A3A5C;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -60px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .site-footer {
            background: #1A1F2B;
            padding: 40px 0 28px;
            color: #D1D5DB;
        }

        .site-footer a {
            color: #D1D5DB;
            transition: color var(--transition-fast);
        }

        .site-footer a:hover {
            color: #FFFFFF;
            text-decoration: underline;
        }

        .footer-divider {
            border-top: 1px solid #374151;
            margin: 24px 0;
        }

        .btn-primary {
            background: #D9434E;
            color: #FFFFFF;
            padding: 12px 24px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 15px;
            display: inline-block;
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
            text-align: center;
        }

        .btn-primary:hover {
            background: #B8323A;
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(217, 67, 78, 0.35);
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid #1A3A5C;
            color: #1A3A5C;
            padding: 10px 20px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 14px;
            display: inline-block;
            transition: all var(--transition-fast);
            cursor: pointer;
            text-align: center;
        }

        .btn-outline:hover {
            background: #F0F4F8;
            border-color: #2C5F8A;
            color: #2C5F8A;
        }

        .btn-white-outline {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.6);
            color: #FFFFFF;
            padding: 10px 20px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 14px;
            display: inline-block;
            transition: all var(--transition-fast);
            cursor: pointer;
            text-align: center;
        }

        .btn-white-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #FFFFFF;
        }

        @media (max-width: 1024px) {
            .masonry-grid {
                grid-template-columns: repeat(2, 1fr);
                grid-auto-rows: 130px;
                gap: 16px;
            }
            .masonry-grid .card-topic.span-col-2 {
                grid-column: span 2;
            }
            .hero-community {
                padding: 45px 0 50px;
                min-height: 360px;
            }
            .nav-left,
            .nav-right {
                gap: 2px;
            }
            .nav-link {
                font-size: 13px;
                padding: 6px 9px;
            }
        }

        @media (max-width: 768px) {
            .hamburger-btn {
                display: flex;
            }
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-container {
                justify-content: space-between;
                height: 56px;
            }
            .nav-logo {
                font-size: 18px;
            }
            .masonry-grid {
                grid-template-columns: 1fr;
                grid-auto-rows: auto;
                gap: 14px;
            }
            .masonry-grid .card-topic {
                grid-row: span 1 !important;
                grid-column: span 1 !important;
            }
            .masonry-grid .card-topic.span-col-2 {
                grid-column: span 1 !important;
            }
            .hero-community {
                padding: 35px 0 40px;
                min-height: 300px;
            }
            .section {
                padding: 40px 0;
            }
            .section-lg {
                padding: 50px 0;
            }
            .card-topic-body {
                padding: 14px 16px;
            }
            .card-topic-title {
                font-size: 15px;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 13px;
            }
            .faq-item.open .faq-answer {
                padding: 12px 16px 16px;
            }
            .site-footer {
                padding: 28px 0 20px;
            }
            .btn-primary,
            .btn-outline {
                padding: 10px 18px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .nav-logo {
                font-size: 16px;
            }
            .hero-community {
                padding: 28px 0 32px;
                min-height: 260px;
            }
            .masonry-grid {
                gap: 10px;
            }
            .card-topic-body {
                padding: 12px 14px;
            }
            .card-topic-title {
                font-size: 14px;
            }
            .card-topic-desc {
                font-size: 12px;
            }
            .card-topic-meta {
                font-size: 11px;
                gap: 8px;
            }
        }

/* roulang page: category7 */
:root {
            --brand-blue: #1A3A5C;
            --brand-blue-light: #2C5F8A;
            --brand-red: #D9434E;
            --brand-red-dark: #B8323A;
            --brand-bg: #F9FAFB;
            --brand-card: #FFFFFF;
            --brand-border: #E5E7EB;
            --brand-gray: #F5F7FA;
            --brand-gray-light: #EBF0F5;
            --brand-dark: #1A1F2B;
            --brand-text: #1F2937;
            --brand-text-weak: #6B7280;
            --card-radius: 10px;
            --btn-radius: 6px;
            --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
            --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            line-height: 1.7;
            color: #1F2937;
            background-color: #F9FAFB;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header / Navigation */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid #E5E7EB;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.10);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            height: 64px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
            padding-right: 20px;
        }

        .nav-right {
            justify-content: flex-start;
            padding-left: 20px;
        }

        .nav-logo {
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 700;
            color: #1A3A5C;
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
            text-align: center;
        }

        .nav-logo:hover {
            color: #2C5F8A;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: #4B5563;
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-link:hover {
            color: #1A3A5C;
            background-color: #F5F7FA;
        }

        .nav-link.active {
            color: #1A3A5C;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: #D9434E;
            border-radius: 1px;
        }

        .nav-cta {
            background: #D9434E;
            color: #FFFFFF;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .nav-cta:hover {
            background: #B8323A;
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(217, 67, 78, 0.3);
        }

        /* Mobile Menu */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: #1A3A5C;
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 20px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            display: block;
            padding: 14px 16px;
            font-size: 16px;
            border-radius: 8px;
            text-align: center;
        }

        /* Section base */
        .section {
            padding: 60px 0;
        }

        .section-sm {
            padding: 40px 0;
        }

        .section-lg {
            padding: 80px 0;
        }

        /* Hero - Bento */
        .hero-partners {
            background: linear-gradient(160deg, #F0F4F8 0%, #E4ECF3 35%, #F5F7FA 70%, #EDF2F7 100%);
            position: relative;
            overflow: hidden;
            padding: 60px 0 70px;
            min-height: 480px;
        }

        .hero-partners::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 340px;
            height: 340px;
            border-radius: 50%;
            background: rgba(26, 58, 92, 0.03);
            pointer-events: none;
        }

        .hero-partners::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(217, 67, 78, 0.03);
            pointer-events: none;
        }

        .bento-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            grid-template-rows: auto auto;
            gap: 20px;
            position: relative;
            z-index: 1;
        }

        .bento-main {
            grid-row: 1 / 3;
            background: #FFFFFF;
            border-radius: 14px;
            padding: 36px 32px;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--brand-border);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .bento-sub {
            background: #FFFFFF;
            border-radius: 14px;
            padding: 24px 28px;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--brand-border);
            display: flex;
            align-items: center;
            gap: 16px;
            transition: all var(--transition-fast);
        }

        .bento-sub:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .bento-cta-bar {
            grid-column: 1 / -1;
            background: var(--brand-blue);
            border-radius: 12px;
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            color: #FFFFFF;
        }

        .bento-stat-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: #EBF0F5;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 22px;
            color: var(--brand-blue);
        }

        /* Logo Wall */
        .logo-wall {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 16px;
            align-items: center;
            justify-items: center;
        }

        .logo-wall-item {
            background: #FFFFFF;
            border-radius: 10px;
            padding: 20px 16px;
            border: 1px solid var(--brand-border);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            min-height: 80px;
            width: 100%;
            cursor: default;
        }

        .logo-wall-item:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
            border-color: #CBD5E1;
        }

        .logo-wall-item .logo-placeholder {
            font-weight: 700;
            font-size: 15px;
            color: #374151;
            text-align: center;
            letter-spacing: 0.3px;
        }

        /* Case Card */
        .case-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: #FFFFFF;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--brand-border);
            transition: all var(--transition-fast);
            margin-bottom: 28px;
        }

        .case-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .case-card.reverse {
            direction: rtl;
        }

        .case-card.reverse .case-content {
            direction: ltr;
        }

        .case-card.reverse .case-image-wrap {
            direction: ltr;
        }

        .case-image-wrap {
            position: relative;
            overflow: hidden;
            min-height: 300px;
            background: #E8EEF4;
        }

        .case-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .case-card:hover .case-image-wrap img {
            transform: scale(1.04);
        }

        .case-content {
            padding: 32px 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .case-tag {
            display: inline-block;
            background: #EBF0F5;
            color: #1A3A5C;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
            width: fit-content;
            letter-spacing: 0.5px;
        }

        .case-metrics {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 12px;
        }

        .case-metric {
            text-align: center;
            min-width: 60px;
        }

        .case-metric-value {
            font-size: 26px;
            font-weight: 700;
            color: #D9434E;
            line-height: 1.2;
        }

        .case-metric-label {
            font-size: 12px;
            color: #6B7280;
            margin-top: 2px;
        }

        /* Process Steps */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .process-step {
            background: #FFFFFF;
            border-radius: 12px;
            padding: 28px 22px;
            text-align: center;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--brand-border);
            position: relative;
            transition: all var(--transition-fast);
        }

        .process-step:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
        }

        .process-step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--brand-blue);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            transition: all var(--transition-fast);
        }

        .process-step:hover .process-step-num {
            background: #D9434E;
            transform: scale(1.08);
        }

        .process-connector {
            display: none;
        }

        /* Testimonial */
        .testimonial-card {
            background: #FFFFFF;
            border-radius: 14px;
            padding: 28px 24px;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--brand-border);
            position: relative;
            transition: all var(--transition-fast);
        }

        .testimonial-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .testimonial-card::before {
            content: '"';
            position: absolute;
            top: 10px;
            left: 18px;
            font-size: 60px;
            color: #E5E7EB;
            font-family: Georgia, serif;
            line-height: 1;
            pointer-events: none;
        }

        .testimonial-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: #E8EEF4;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #1A3A5C;
            flex-shrink: 0;
            font-size: 16px;
        }

        /* FAQ */
        .faq-item {
            background: #FFFFFF;
            border-radius: 10px;
            margin-bottom: 10px;
            border: 1px solid var(--brand-border);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        .faq-question {
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: #1F2937;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            transition: background var(--transition-fast);
            gap: 12px;
        }

        .faq-question:hover {
            background: #F9FAFB;
        }

        .faq-arrow {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            transition: transform var(--transition-smooth);
            color: #6B7280;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: #D9434E;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 22px;
            color: #4B5563;
            font-size: 15px;
            line-height: 1.7;
            background: #FAFBFC;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        .faq-item.open .faq-question {
            background: #F9FAFB;
            color: #1A3A5C;
        }

        /* CTA Section */
        .cta-section {
            background: var(--brand-blue);
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30px;
            left: -30px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }

        .cta-form input {
            padding: 12px 16px;
            border-radius: 6px;
            border: 1px solid #CBD5E1;
            font-size: 15px;
            outline: none;
            transition: all var(--transition-fast);
            background: #FFFFFF;
            width: 100%;
        }

        .cta-form input:focus {
            border-color: #D9434E;
            box-shadow: 0 0 0 3px rgba(217, 67, 78, 0.1);
        }

        .btn-primary {
            background: #D9434E;
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            display: inline-block;
            text-align: center;
        }

        .btn-primary:hover {
            background: #B8323A;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(217, 67, 78, 0.35);
        }

        .btn-outline {
            background: transparent;
            color: #1A3A5C;
            padding: 10px 22px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 14px;
            border: 1px solid #1A3A5C;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            display: inline-block;
            text-align: center;
        }

        .btn-outline:hover {
            background: #EBF0F5;
            border-color: #2C5F8A;
            color: #2C5F8A;
        }

        .btn-white-outline {
            background: transparent;
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 14px;
            border: 1px solid rgba(255, 255, 255, 0.5);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            display: inline-block;
            text-align: center;
        }

        .btn-white-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #FFFFFF;
        }

        /* Footer */
        .site-footer {
            background: #1A1F2B;
            padding: 40px 0 28px;
            color: #FFFFFF;
        }

        .site-footer a {
            color: #D1D5DB;
            transition: color var(--transition-fast);
        }

        .site-footer a:hover {
            color: #FFFFFF;
            text-decoration: underline;
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            margin: 20px 0;
        }

        /* Section title */
        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: #1F2937;
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }

        .section-subtitle {
            font-size: 15px;
            color: #6B7280;
            margin-bottom: 32px;
            max-width: 600px;
        }

        .section-label {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: #D9434E;
            margin-bottom: 8px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .bento-grid {
                grid-template-columns: 1fr;
                grid-template-rows: auto;
            }
            .bento-main {
                grid-row: auto;
            }
            .logo-wall {
                grid-template-columns: repeat(4, 1fr);
            }
            .case-card {
                grid-template-columns: 1fr;
            }
            .case-card.reverse {
                direction: ltr;
            }
            .case-image-wrap {
                min-height: 220px;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .section {
                padding: 40px 0;
            }
            .section-lg {
                padding: 50px 0;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .nav-container {
                justify-content: space-between;
                height: 56px;
            }
            .nav-logo {
                font-size: 18px;
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }
            .hamburger-btn {
                margin-left: auto;
                order: 3;
            }
            .logo-wall {
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
            }
            .logo-wall-item {
                padding: 14px 10px;
                min-height: 60px;
            }
            .logo-wall-item .logo-placeholder {
                font-size: 12px;
            }
            .bento-sub {
                flex-direction: column;
                text-align: center;
            }
            .bento-cta-bar {
                flex-direction: column;
                text-align: center;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .process-step {
                padding: 20px 14px;
            }
            .case-content {
                padding: 22px 16px;
            }
            .section-title {
                font-size: 22px;
            }
            .cta-form {
                flex-direction: column;
            }
            .hero-partners {
                padding: 40px 0 50px;
                min-height: auto;
            }
            .bento-main {
                padding: 24px 18px;
            }
            .case-metrics {
                gap: 12px;
            }
            .case-metric-value {
                font-size: 22px;
            }
        }

        @media (max-width: 520px) {
            .logo-wall {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .logo-wall-item {
                padding: 12px 8px;
                min-height: 50px;
            }
            .logo-wall-item .logo-placeholder {
                font-size: 11px;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .bento-main {
                padding: 20px 14px;
            }
            .bento-sub {
                padding: 16px 14px;
            }
            .bento-cta-bar {
                padding: 16px 14px;
            }
            .case-content {
                padding: 18px 12px;
            }
            .section {
                padding: 30px 0;
            }
            .section-title {
                font-size: 20px;
            }
            .container-main {
                padding-left: 12px;
                padding-right: 12px;
            }
        }