/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a4a;
            --primary-dark: #0f1a30;
            --primary-light: #2c3e6b;
            --accent: #d4a030;
            --accent-light: #e8c060;
            --accent-dark: #b8891e;
            --bg-light: #f5f6fa;
            --bg-white: #ffffff;
            --bg-dark: #0f1a30;
            --text-dark: #1a1a2e;
            --text-body: #3d4050;
            --text-muted: #7a7e8c;
            --text-light: #f0f2f8;
            --border-light: #e2e5ef;
            --border-medium: #c8cddb;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(26, 42, 74, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 42, 74, 0.10);
            --shadow-lg: 0 12px 40px rgba(26, 42, 74, 0.14);
            --shadow-xl: 0 20px 60px rgba(26, 42, 74, 0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --spacer-section: 5rem;
            --spacer-section-mobile: 3rem;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            line-height: 1.3;
            font-weight: 700;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            padding: 0 24px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Section Spacing ===== */
        .section-padding {
            padding: var(--spacer-section) 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: var(--spacer-section-mobile) 0;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .site-header .navbar {
            padding: 0;
            min-height: 72px;
        }
        .site-header .navbar-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
            padding: 0.5rem 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-header .navbar-brand .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
        }
        .site-header .navbar-brand:hover {
            color: var(--primary);
        }
        .site-header .nav-link {
            color: var(--text-body);
            font-weight: 500;
            padding: 0.6rem 1rem !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            font-size: 0.95rem;
        }
        .site-header .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 42, 74, 0.04);
        }
        .site-header .nav-link.active {
            color: var(--accent-dark);
            background: rgba(212, 160, 48, 0.08);
        }
        .site-header .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 1rem;
            right: 1rem;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .site-header .nav-cta {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--primary-dark) !important;
            font-weight: 700;
            padding: 0.5rem 1.5rem !important;
            border-radius: var(--radius-md);
            box-shadow: 0 4px 14px rgba(212, 160, 48, 0.30);
            transition: var(--transition);
        }
        .site-header .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(212, 160, 48, 0.40);
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
        }
        .navbar-toggler {
            border: none;
            padding: 0.5rem;
            color: var(--primary);
            font-size: 1.5rem;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 3px solid var(--accent);
        }
        @media (max-width: 991px) {
            .site-header .navbar {
                min-height: 64px;
            }
            .site-header .navbar-collapse {
                background: var(--bg-white);
                padding: 1rem 0;
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-lg);
                margin-top: 0.5rem;
            }
            .site-header .nav-link.active::after {
                display: none;
            }
            .site-header .nav-cta {
                margin-top: 0.5rem;
                text-align: center;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            background: var(--primary-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.35;
            transform: scale(1.02);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg {
            transform: scale(1.06);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 48, 0.88) 0%, rgba(26, 42, 74, 0.70) 50%, rgba(15, 26, 48, 0.85) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 4rem 0 5rem;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212, 160, 48, 0.18);
            border: 1px solid rgba(212, 160, 48, 0.30);
            color: var(--accent-light);
            padding: 0.4rem 1.4rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            backdrop-filter: blur(4px);
            margin-bottom: 1.5rem;
        }
        .hero-badge i {
            font-size: 0.7rem;
            color: var(--accent);
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--text-light);
            line-height: 1.2;
            margin-bottom: 1.2rem;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.30);
        }
        .hero-title .highlight {
            color: var(--accent-light);
            background: linear-gradient(135deg, var(--accent-light), #f0d080);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-sub {
            font-size: 1.15rem;
            color: rgba(240, 242, 248, 0.80);
            max-width: 680px;
            margin: 0 auto 2.2rem;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .hero-actions .btn {
            padding: 0.8rem 2.4rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            font-size: 1.05rem;
            transition: var(--transition);
        }
        .hero-actions .btn-primary-custom {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--primary-dark);
            border: none;
            box-shadow: 0 8px 28px rgba(212, 160, 48, 0.35);
        }
        .hero-actions .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(212, 160, 48, 0.50);
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
        }
        .hero-actions .btn-outline-custom {
            background: transparent;
            color: var(--text-light);
            border: 2px solid rgba(255, 255, 255, 0.30);
            backdrop-filter: blur(4px);
        }
        .hero-actions .btn-outline-custom:hover {
            border-color: var(--accent-light);
            color: var(--accent-light);
            background: rgba(212, 160, 48, 0.10);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 2.5rem 4rem;
            margin-top: 3.5rem;
            padding-top: 2.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.10);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-light);
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.9rem;
            color: rgba(240, 242, 248, 0.60);
            margin-top: 0.2rem;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 70vh;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-actions .btn {
                padding: 0.65rem 1.6rem;
                font-size: 0.95rem;
                width: 100%;
                max-width: 280px;
            }
            .hero-stats {
                gap: 1.5rem 2rem;
            }
            .hero-stat-item .number {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 0.3rem 1rem;
            }
        }

        /* ===== Section Title ===== */
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 0.6rem;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 3rem;
            line-height: 1.7;
        }
        .section-title-center {
            text-align: center;
        }
        .section-title-center .section-title {
            position: relative;
            display: inline-block;
        }
        .section-title-center .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            border-radius: 4px;
            margin: 0.8rem auto 0;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 2rem;
            }
        }

        /* ===== Intro Section ===== */
        .intro-section {
            background: var(--bg-white);
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem 4rem;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .intro-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .intro-image:hover img {
            transform: scale(1.04);
        }
        .intro-content h2 {
            font-size: 2rem;
            margin-bottom: 1.2rem;
        }
        .intro-content p {
            font-size: 1.05rem;
            color: var(--text-body);
            margin-bottom: 1rem;
            line-height: 1.8;
        }
        .intro-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 1.5rem;
        }
        .intro-tags .tag {
            background: rgba(26, 42, 74, 0.06);
            color: var(--primary-light);
            padding: 0.3rem 1rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .intro-tags .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        @media (max-width: 991px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .intro-image img {
                height: 280px;
            }
            .intro-content h2 {
                font-size: 1.6rem;
            }
        }

        /* ===== Categories Section ===== */
        .categories-section {
            background: var(--bg-light);
        }
        .category-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            border: 1px solid var(--border-light);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent-light);
        }
        .category-card .card-img {
            height: 200px;
            overflow: hidden;
        }
        .category-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .card-img img {
            transform: scale(1.08);
        }
        .category-card .card-body {
            padding: 1.5rem 1.8rem 2rem;
        }
        .category-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--text-dark);
        }
        .category-card .card-body p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1.2rem;
        }
        .category-card .card-body .btn-category {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: var(--primary-light);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .category-card .card-body .btn-category i {
            transition: transform 0.3s ease;
        }
        .category-card .card-body .btn-category:hover {
            color: var(--accent);
        }
        .category-card .card-body .btn-category:hover i {
            transform: translateX(4px);
        }
        @media (max-width: 768px) {
            .category-card .card-img {
                height: 160px;
            }
            .category-card .card-body {
                padding: 1.2rem 1.4rem 1.6rem;
            }
        }

        /* ===== Advantages Section ===== */
        .advantages-section {
            background: var(--bg-white);
        }
        .advantage-item {
            text-align: center;
            padding: 2rem 1.5rem;
            border-radius: var(--radius-md);
            transition: var(--transition);
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            height: 100%;
        }
        .advantage-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent-light);
        }
        .advantage-item .icon-box {
            width: 64px;
            height: 64px;
            margin: 0 auto 1.2rem;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            box-shadow: 0 8px 20px rgba(26, 42, 74, 0.15);
        }
        .advantage-item h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
        }
        .advantage-item p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .advantage-item {
                padding: 1.5rem 1rem;
            }
        }

        /* ===== News / CMS List Section ===== */
        .news-section {
            background: var(--bg-light);
        }
        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent-light);
        }
        .news-card .news-img {
            height: 180px;
            overflow: hidden;
        }
        .news-card .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .news-card:hover .news-img img {
            transform: scale(1.06);
        }
        .news-card .news-body {
            padding: 1.3rem 1.5rem 1.6rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .news-body .news-meta {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 0.6rem;
        }
        .news-card .news-body .news-meta .category-badge {
            background: rgba(212, 160, 48, 0.12);
            color: var(--accent-dark);
            padding: 0.15rem 0.8rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.78rem;
        }
        .news-card .news-body .news-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.6rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-body .news-title a {
            color: inherit;
        }
        .news-card .news-body .news-title a:hover {
            color: var(--primary-light);
        }
        .news-card .news-body .news-excerpt {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.8rem;
        }
        .news-card .news-body .news-link {
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--primary-light);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .news-card .news-body .news-link i {
            transition: transform 0.3s ease;
        }
        .news-card .news-body .news-link:hover i {
            transform: translateX(4px);
        }
        .news-empty {
            text-align: center;
            padding: 3rem 1rem;
            color: var(--text-muted);
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-medium);
            font-size: 1.05rem;
        }
        @media (max-width: 768px) {
            .news-card .news-img {
                height: 140px;
            }
            .news-card .news-body {
                padding: 1rem 1.2rem 1.3rem;
            }
        }

        /* ===== Process Section ===== */
        .process-section {
            background: var(--bg-white);
        }
        .process-step {
            text-align: center;
            position: relative;
            padding: 0 1rem;
        }
        .process-step .step-number {
            width: 56px;
            height: 56px;
            margin: 0 auto 1.2rem;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 24px rgba(26, 42, 74, 0.20);
            position: relative;
            z-index: 2;
        }
        .process-step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .process-step p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .process-connector {
            position: absolute;
            top: 28px;
            left: 60%;
            right: -20%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-light), var(--accent-light));
            z-index: 1;
            opacity: 0.3;
        }
        @media (max-width: 768px) {
            .process-step {
                margin-bottom: 2rem;
            }
            .process-connector {
                display: none;
            }
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: var(--bg-light);
        }
        .faq-accordion .accordion-item {
            border: none;
            margin-bottom: 0.8rem;
            border-radius: var(--radius-md) !important;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            background: var(--bg-white);
            border: 1px solid var(--border-light);
        }
        .faq-accordion .accordion-button {
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--text-dark);
            padding: 1.2rem 1.6rem;
            background: var(--bg-white);
            box-shadow: none;
            border-radius: var(--radius-md) !important;
            transition: var(--transition);
        }
        .faq-accordion .accordion-button::after {
            background-size: 1rem;
            transition: var(--transition);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(26, 42, 74, 0.02);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 3px solid var(--accent);
            outline-offset: -3px;
        }
        .faq-accordion .accordion-body {
            padding: 0.2rem 1.6rem 1.4rem;
            color: var(--text-body);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.10;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 1rem 0;
        }
        .cta-content h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 1rem;
        }
        .cta-content p {
            font-size: 1.1rem;
            color: rgba(240, 242, 248, 0.75);
            max-width: 560px;
            margin: 0 auto 2rem;
            line-height: 1.8;
        }
        .cta-content .btn-cta {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--primary-dark);
            font-weight: 700;
            padding: 0.9rem 3rem;
            border-radius: var(--radius-md);
            font-size: 1.1rem;
            border: none;
            box-shadow: 0 8px 32px rgba(212, 160, 48, 0.35);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .cta-content .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 48px rgba(212, 160, 48, 0.50);
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
        }
        @media (max-width: 768px) {
            .cta-content h2 {
                font-size: 1.6rem;
            }
            .cta-content p {
                font-size: 0.95rem;
            }
            .cta-content .btn-cta {
                padding: 0.75rem 2rem;
                font-size: 1rem;
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(240, 242, 248, 0.70);
            padding: 4rem 0 0;
        }
        .site-footer h5 {
            color: var(--text-light);
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 1.2rem;
        }
        .site-footer a {
            color: rgba(240, 242, 248, 0.65);
            transition: var(--transition);
            font-size: 0.92rem;
        }
        .site-footer a:hover {
            color: var(--accent-light);
        }
        .site-footer .footer-links li {
            margin-bottom: 0.5rem;
        }
        .site-footer .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .site-footer .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-dark);
            font-weight: 800;
            font-size: 1rem;
        }
        .site-footer .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 1.5rem;
            max-width: 320px;
        }
        .site-footer .social-links {
            display: flex;
            gap: 0.8rem;
        }
        .site-footer .social-links a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: rgba(240, 242, 248, 0.60);
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .site-footer .social-links a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
            transform: translateY(-3px);
        }
        .site-footer .footer-bottom {
            margin-top: 3rem;
            padding: 1.5rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.85rem;
            text-align: center;
            color: rgba(240, 242, 248, 0.45);
        }
        @media (max-width: 768px) {
            .site-footer {
                padding: 3rem 0 0;
            }
            .site-footer .footer-brand {
                font-size: 1.1rem;
            }
            .site-footer .footer-bottom {
                margin-top: 2rem;
                padding: 1rem 0;
            }
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            z-index: 1040;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            background: var(--primary-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .back-to-top:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        @media (max-width: 768px) {
            .back-to-top {
                bottom: 1.2rem;
                right: 1.2rem;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

        /* ===== Responsive Utilities ===== */
        @media (max-width: 576px) {
            .container {
                padding: 0 12px;
            }
            .section-padding {
                padding: 2.5rem 0;
            }
            .row {
                margin-left: -8px;
                margin-right: -8px;
            }
            .col-6,
            .col-md-4,
            .col-md-6,
            .col-lg-3,
            .col-lg-4 {
                padding-left: 8px;
                padding-right: 8px;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2a6df4;
            --primary-dark: #1a4db8;
            --primary-light: #e8f0fe;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --success: #10b981;
            --danger: #ef4444;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-gray: #f1f5f9;
            --bg-dark: #0f172a;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-white: #ffffff;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            transition: var(--transition);
        }
        button:focus,
        input:focus,
        textarea:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        ul,
        ol {
            padding-left: 0;
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-top: 0;
        }
        p {
            margin-top: 0;
            color: var(--text-secondary);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            padding-left: 20px;
            padding-right: 20px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .navbar {
            padding: 0;
            width: 100%;
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            padding: 0;
        }
        .site-header .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 2px 10px rgba(42, 109, 244, 0.3);
        }
        .site-header .navbar-brand:hover {
            color: var(--text-primary);
        }
        .site-header .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .site-header .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .site-header .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .site-header .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .site-header .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(42, 109, 244, 0.3);
        }
        .site-header .nav-cta:hover {
            background: linear-gradient(135deg, var(--primary-dark), #0f3a8e);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(42, 109, 244, 0.4);
            color: #fff !important;
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 24px;
            color: var(--text-primary);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
        }

        /* ===== Banner / Hero ===== */
        .page-banner {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, #0f172a 0%, #1a2a4a 50%, #0f172a 100%);
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 1;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
            z-index: 2;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 3;
            text-align: center;
        }
        .page-banner .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 20px;
        }
        .page-banner .banner-badge i {
            color: var(--accent);
        }
        .page-banner h1 {
            font-size: 48px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -1px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        .page-banner .banner-sub {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .page-banner .banner-actions {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .page-banner .banner-actions .btn {
            padding: 12px 32px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
        }
        .page-banner .banner-actions .btn-primary {
            background: var(--primary);
            border: none;
            box-shadow: 0 4px 16px rgba(42, 109, 244, 0.4);
        }
        .page-banner .banner-actions .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(42, 109, 244, 0.5);
        }
        .page-banner .banner-actions .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            background: transparent;
        }
        .page-banner .banner-actions .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 80px 0;
        }
        .section-block .section-title {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-block .section-sub {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 48px;
            text-align: center;
        }
        .section-block .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-block .section-header .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 40px;
            margin-bottom: 12px;
        }

        /* ===== 入口卡片 ===== */
        .entry-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .entry-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .entry-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .entry-card:hover::before {
            opacity: 1;
        }
        .entry-card .entry-icon {
            width: 56px;
            height: 56px;
            background: var(--primary-light);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 18px;
            transition: var(--transition);
        }
        .entry-card:hover .entry-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .entry-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .entry-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .entry-card .entry-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 16px;
        }
        .entry-card .entry-tags span {
            background: var(--bg-gray);
            color: var(--text-secondary);
            font-size: 12px;
            padding: 2px 12px;
            border-radius: 20px;
            font-weight: 500;
        }
        .entry-card .entry-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }
        .entry-card .entry-link i {
            transition: var(--transition);
        }
        .entry-card .entry-link:hover i {
            transform: translateX(4px);
        }
        .entry-card .entry-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--accent-light);
            color: #b45309;
            font-size: 12px;
            font-weight: 600;
            padding: 2px 14px;
            border-radius: 20px;
        }
        .entry-card .entry-badge.hot {
            background: #fee2e2;
            color: #b91c1c;
        }
        .entry-card .entry-badge.new {
            background: #d1fae5;
            color: #065f46;
        }

        /* ===== 详细步骤 ===== */
        .step-section {
            background: var(--bg-white);
        }
        .step-card {
            display: flex;
            gap: 20px;
            padding: 28px 24px;
            background: var(--bg-body);
            border-radius: var(--radius-md);
            transition: var(--transition);
            border: 1px solid var(--border-color);
            margin-bottom: 16px;
        }
        .step-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            box-shadow: 0 4px 12px rgba(42, 109, 244, 0.25);
        }
        .step-card .step-content h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-card .step-content p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== 安全认证 ===== */
        .security-section {
            background: var(--bg-gray);
        }
        .security-card {
            text-align: center;
            padding: 32px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
        }
        .security-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .security-card .sec-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--primary);
            transition: var(--transition);
        }
        .security-card:hover .sec-icon {
            background: var(--primary);
            color: #fff;
        }
        .security-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .security-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== 用户评价 / 数据 ===== */
        .testimonial-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .testimonial-card .stars {
            color: var(--accent);
            font-size: 14px;
            margin-bottom: 12px;
        }
        .testimonial-card blockquote {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            font-style: italic;
        }
        .testimonial-card .testi-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-card .testi-author .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 700;
            font-size: 16px;
        }
        .testimonial-card .testi-author .info strong {
            font-size: 14px;
            display: block;
        }
        .testimonial-card .testi-author .info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-white);
        }
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--bg-body);
            transition: var(--transition);
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-item .faq-question:hover {
            background: var(--primary-light);
        }
        .faq-item .faq-question i {
            transition: var(--transition);
            color: var(--primary);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a, #1a2a4a);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-cta {
            background: var(--accent);
            color: #0f172a;
            padding: 14px 40px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 17px;
            border: none;
            box-shadow: 0 6px 24px rgba(245, 158, 11, 0.35);
            transition: var(--transition);
        }
        .cta-section .btn-cta:hover {
            background: #fbbf24;
            transform: translateY(-2px);
            box-shadow: 0 10px 36px rgba(245, 158, 11, 0.45);
            color: #0f172a;
        }
        .cta-section .btn-outline-cta {
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
            background: transparent;
            transition: var(--transition);
        }
        .cta-section .btn-outline-cta:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: translateY(-2px);
            color: #fff;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer .footer-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 20px;
            font-weight: 800;
        }
        .site-footer .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 320px;
        }
        .site-footer .social-links {
            display: flex;
            gap: 12px;
        }
        .site-footer .social-links a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 18px;
            transition: var(--transition);
        }
        .site-footer .social-links a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .site-footer h5 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .site-footer .footer-links {
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 10px;
            font-size: 14px;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .site-footer .footer-links i {
            color: var(--primary);
            width: 20px;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            margin-top: 40px;
            text-align: center;
        }
        .site-footer .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            margin: 0;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .page-banner h1 {
                font-size: 38px;
            }
            .section-block .section-title {
                font-size: 28px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .site-header .navbar-brand {
                font-size: 18px;
            }
            .site-header .navbar-brand .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .page-banner {
                padding: 70px 0 50px;
                min-height: 300px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner .banner-sub {
                font-size: 15px;
            }
            .page-banner .banner-actions .btn {
                padding: 10px 24px;
                font-size: 14px;
            }
            .section-block {
                padding: 50px 0;
            }
            .section-block .section-title {
                font-size: 24px;
            }
            .section-block .section-sub {
                font-size: 15px;
                margin-bottom: 32px;
            }
            .entry-card {
                padding: 24px 20px;
            }
            .entry-card .entry-icon {
                width: 48px;
                height: 48px;
                font-size: 20px;
            }
            .step-card {
                flex-direction: column;
                gap: 12px;
                padding: 20px 16px;
            }
            .step-card .step-num {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }
            .security-card {
                padding: 24px 16px;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section .btn-cta {
                padding: 12px 28px;
                font-size: 15px;
            }
            .site-footer {
                padding: 40px 0 0;
            }
            .site-footer .footer-brand {
                font-size: 18px;
            }
            .navbar-collapse {
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                padding: 16px 20px;
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-lg);
                margin-top: 12px;
                border: 1px solid var(--border-color);
            }
            .site-header .nav-link.active::after {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 22px;
            }
            .page-banner .banner-sub {
                font-size: 14px;
            }
            .page-banner .banner-actions {
                flex-direction: column;
                align-items: center;
            }
            .page-banner .banner-actions .btn {
                width: 100%;
                max-width: 260px;
            }
            .section-block .section-title {
                font-size: 20px;
            }
            .entry-card h3 {
                font-size: 17px;
            }
            .testimonial-card blockquote {
                font-size: 14px;
            }
            .faq-item .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-item .faq-answer {
                font-size: 13px;
                padding: 0 16px 14px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .cta-section p {
                font-size: 14px;
            }
        }

        /* ===== 辅助 ===== */
        .bg-soft-primary {
            background: var(--primary-light);
        }
        .text-primary {
            color: var(--primary) !important;
        }
        .gap-1 {
            gap: 4px;
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-2 {
            margin-top: 8px;
        }
        .mt-3 {
            margin-top: 16px;
        }
        .mt-4 {
            margin-top: 24px;
        }
        .mb-3 {
            margin-bottom: 16px;
        }
        .mb-4 {
            margin-bottom: 24px;
        }
        .rounded-pill {
            border-radius: 40px;
        }
        .fw-600 {
            font-weight: 600;
        }

        /* 分页 / 面包屑 */
        .breadcrumb-area {
            background: var(--bg-body);
            padding: 16px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb-area .breadcrumb {
            margin: 0;
            font-size: 13px;
        }
        .breadcrumb-area .breadcrumb-item a {
            color: var(--text-secondary);
        }
        .breadcrumb-area .breadcrumb-item.active {
            color: var(--text-primary);
            font-weight: 600;
        }
        .breadcrumb-area .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-muted);
        }

/* roulang page: article */
:root {
            --primary: #6C5CE7;
            --primary-dark: #5A4BD1;
            --primary-light: #A29BFE;
            --secondary: #FDCB6E;
            --secondary-light: #FFEAA7;
            --accent: #FD79A8;
            --bg: #f5f6fa;
            --bg-card: #ffffff;
            --bg-dark: #2d3436;
            --text: #2d3436;
            --text-light: #636e72;
            --text-muted: #b2bec3;
            --border: #e9ecef;
            --border-light: #f0f0f5;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(108, 92, 231, 0.10);
            --shadow-lg: 0 16px 48px rgba(108, 92, 231, 0.15);
            --shadow-hover: 0 12px 40px rgba(108, 92, 231, 0.18);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: var(--font);
            font-size: 1rem;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--primary-dark);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

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

        .container {
            max-width: 1200px;
            padding: 0 20px;
            margin: 0 auto;
        }

        .container-narrow {
            max-width: 860px;
            padding: 0 20px;
            margin: 0 auto;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid rgba(108, 92, 231, 0.08);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
        }

        .navbar {
            padding: 0.6rem 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            text-decoration: none;
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }

        .navbar-brand:hover {
            color: var(--primary);
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 12px;
            font-size: 1.3rem;
            font-weight: 700;
            box-shadow: 0 4px 12px rgba(108, 92, 231, 0.25);
        }

        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 1.4rem;
            color: var(--text);
            padding: 4px 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }

        .navbar-toggler:hover {
            background: var(--border-light);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2);
            outline: none;
        }

        .navbar-nav {
            gap: 2px;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            padding: 0.55rem 1rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(108, 92, 231, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
            background: rgba(108, 92, 231, 0.10);
            font-weight: 600;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            padding: 0.55rem 1.4rem !important;
            border-radius: 40px;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.25);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(108, 92, 231, 0.35);
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff !important;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.92), rgba(45, 52, 54, 0.88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg), transparent);
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .banner-badge {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(6px);
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 16px;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }

        .banner-title {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            max-width: 800px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }

        .banner-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.8);
        }

        .banner-meta i {
            margin-right: 6px;
        }

        .banner-meta span {
            display: inline-flex;
            align-items: center;
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 40px 0 60px;
            position: relative;
            z-index: 3;
            margin-top: -40px;
        }

        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 48px 56px;
            border: 1px solid rgba(108, 92, 231, 0.04);
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }

        .article-body h2,
        .article-body h3,
        .article-body h4 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.3px;
        }

        .article-body h2 {
            font-size: 1.7rem;
            border-bottom: 2px solid var(--border-light);
            padding-bottom: 0.5rem;
        }

        .article-body h3 {
            font-size: 1.35rem;
        }

        .article-body h4 {
            font-size: 1.15rem;
        }

        .article-body p {
            margin-bottom: 1.25rem;
        }

        .article-body ul,
        .article-body ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
        }

        .article-body li {
            margin-bottom: 0.5rem;
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: rgba(108, 92, 231, 0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }

        .article-body img {
            border-radius: var(--radius-sm);
            margin: 1.5rem auto;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-body a:hover {
            color: var(--primary-dark);
        }

        .article-body code {
            background: var(--border-light);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            font-family: 'SF Mono', 'Fira Code', monospace;
        }

        .article-body pre {
            background: var(--bg-dark);
            color: #f8f9fa;
            padding: 1.25rem 1.5rem;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 1.5rem 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .article-body pre code {
            background: transparent;
            padding: 0;
            color: inherit;
            font-size: inherit;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
        }

        .article-body th,
        .article-body td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-body th {
            background: rgba(108, 92, 231, 0.06);
            font-weight: 600;
        }

        .article-body hr {
            margin: 2rem 0;
            border: none;
            border-top: 2px solid var(--border-light);
        }

        /* ===== Article Footer ===== */
        .article-footer {
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(108, 92, 231, 0.07);
            color: var(--primary);
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            transition: background var(--transition), color var(--transition);
        }

        .tag:hover {
            background: var(--primary);
            color: #fff;
        }

        .article-share {
            display: flex;
            gap: 10px;
            align-items: center;
            font-size: 0.9rem;
            color: var(--text-light);
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--border-light);
            color: var(--text-light);
            font-size: 1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }

        .share-btn:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg);
        }

        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-header h2 {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.4px;
            color: var(--text);
            margin-bottom: 10px;
        }

        .section-header p {
            color: var(--text-light);
            font-size: 1.05rem;
            max-width: 520px;
            margin: 0 auto;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid rgba(108, 92, 231, 0.04);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .related-card .card-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .related-card .card-img .card-cat {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 3px 12px;
            background: rgba(108, 92, 231, 0.85);
            backdrop-filter: blur(4px);
            border-radius: 40px;
            font-size: 0.7rem;
            font-weight: 600;
            color: #fff;
            letter-spacing: 0.3px;
        }

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

        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            color: var(--text);
            flex: 1;
        }

        .related-card .card-body h3 a {
            color: inherit;
            text-decoration: none;
        }

        .related-card .card-body h3 a:hover {
            color: var(--primary);
        }

        .related-card .card-body .card-excerpt {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body .card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: auto;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 60px 0 70px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.4px;
        }

        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.85;
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .cta-btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            transition: transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
        }

        .cta-btn-primary {
            background: #fff;
            color: var(--primary) !important;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
        }

        .cta-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
            color: var(--primary-dark) !important;
        }

        .cta-btn-outline {
            background: transparent;
            color: #fff !important;
            border: 2px solid rgba(255, 255, 255, 0.35);
        }

        .cta-btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-3px);
            color: #fff !important;
        }

        /* ===== Not Found ===== */
        .not-found-section {
            padding: 100px 0 120px;
            text-align: center;
        }

        .not-found-icon {
            font-size: 4rem;
            color: var(--primary-light);
            margin-bottom: 20px;
        }

        .not-found-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .not-found-section p {
            color: var(--text-light);
            font-size: 1.1rem;
            margin-bottom: 28px;
        }

        .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 40px;
            font-weight: 600;
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .btn-home:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(108, 92, 231, 0.30);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 20px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
            max-width: 360px;
        }

        .social-links {
            display: flex;
            gap: 12px;
        }

        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.15rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }

        .social-links a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        .site-footer h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
            font-size: 0.9rem;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
            text-decoration: none;
        }

        .footer-links a:hover {
            color: var(--secondary);
        }

        .footer-links i {
            width: 20px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .banner-title {
                font-size: 2rem;
            }
            .article-card {
                padding: 36px 32px;
            }
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 60px 0 50px;
                min-height: 220px;
            }
            .banner-title {
                font-size: 1.6rem;
            }
            .banner-meta {
                font-size: 0.8rem;
                gap: 10px 16px;
            }
            .article-section {
                padding: 20px 0 40px;
                margin-top: -20px;
            }
            .article-card {
                padding: 24px 20px;
                border-radius: var(--radius);
            }
            .article-body {
                font-size: 1rem;
            }
            .article-body h2 {
                font-size: 1.4rem;
            }
            .article-body h3 {
                font-size: 1.2rem;
            }
            .article-footer {
                flex-direction: column;
                align-items: flex-start;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-btn {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
            .site-footer {
                padding: 40px 0 16px;
            }
            .navbar-brand {
                font-size: 1.15rem;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 1.1rem;
            }
            .nav-link {
                padding: 0.5rem 0.8rem;
                font-size: 0.9rem;
            }
            .nav-cta {
                padding: 0.5rem 1.2rem !important;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner {
                padding: 40px 0 40px;
                min-height: 180px;
            }
            .banner-title {
                font-size: 1.3rem;
            }
            .banner-badge {
                font-size: 0.7rem;
                padding: 3px 12px;
            }
            .banner-meta {
                font-size: 0.75rem;
                gap: 6px 12px;
                flex-wrap: wrap;
            }
            .article-card {
                padding: 18px 14px;
                border-radius: var(--radius-sm);
            }
            .article-body {
                font-size: 0.95rem;
                line-height: 1.8;
            }
            .article-body h2 {
                font-size: 1.25rem;
            }
            .article-body h3 {
                font-size: 1.1rem;
            }
            .article-body blockquote {
                padding: 0.75rem 1rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .related-card .card-img {
                height: 150px;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .cta-section {
                padding: 40px 0 50px;
            }
            .cta-section h2 {
                font-size: 1.25rem;
            }
            .cta-section p {
                font-size: 0.88rem;
            }
            .cta-btn-group {
                flex-direction: column;
                align-items: center;
            }
            .cta-btn {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
            .not-found-section {
                padding: 60px 0 80px;
            }
            .not-found-icon {
                font-size: 3rem;
            }
            .not-found-section h2 {
                font-size: 1.5rem;
            }
            .site-footer {
                padding: 32px 0 12px;
            }
            .footer-brand {
                font-size: 1.15rem;
            }
            .social-links a {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }
            .footer-links li {
                font-size: 0.85rem;
            }
            .navbar-brand {
                font-size: 1rem;
            }
            .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 1rem;
                border-radius: 10px;
            }
            .nav-link {
                font-size: 0.85rem;
                padding: 0.4rem 0.6rem;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --secondary: #fd79a8;
            --accent: #00cec9;
            --bg-dark: #0f0a1e;
            --bg-darker: #0a0718;
            --bg-card: #1a1335;
            --bg-card-hover: #221b42;
            --bg-section: #120d26;
            --bg-soft: #1e1638;
            --text-white: #f8f7fc;
            --text-light: #d5d0e8;
            --text-muted: #9a92b8;
            --border-color: #2d2450;
            --border-light: #3d3270;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.15);
            --shadow-md: 0 8px 30px rgba(108, 92, 231, 0.20);
            --shadow-lg: 0 20px 60px rgba(108, 92, 231, 0.25);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            outline: none;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            padding: 0 20px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: rgba(15, 10, 30, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: 0;
            transition: var(--transition);
        }
        .site-header .navbar {
            padding: 12px 0;
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: -0.3px;
        }
        .site-header .navbar-brand:hover {
            color: var(--primary-light);
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
        }
        .nav-link {
            color: var(--text-muted) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover,
        .nav-link:focus-visible {
            color: var(--text-white) !important;
            background: rgba(108, 92, 231, 0.15);
        }
        .nav-link.active {
            color: var(--text-white) !important;
            background: rgba(108, 92, 231, 0.20) !important;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary-light);
            border-radius: 4px;
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary)) !important;
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: var(--radius-sm);
            font-weight: 600;
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.3);
            border: none;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(108, 92, 231, 0.45);
            color: #fff !important;
            background: linear-gradient(135deg, var(--primary-dark), var(--secondary)) !important;
        }
        .navbar-toggler {
            border: none;
            color: var(--text-light);
            font-size: 1.4rem;
            padding: 4px 8px;
            background: transparent;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.4);
        }

        /* ===== Breadcrumb ===== */
        .page-breadcrumb {
            padding: 20px 0 10px;
            background: transparent;
        }
        .page-breadcrumb .breadcrumb {
            background: transparent;
            padding: 0;
            margin: 0;
        }
        .page-breadcrumb .breadcrumb-item {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .page-breadcrumb .breadcrumb-item a {
            color: var(--primary-light);
        }
        .page-breadcrumb .breadcrumb-item a:hover {
            color: var(--secondary);
        }
        .page-breadcrumb .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-muted);
            content: '›';
        }
        .page-breadcrumb .breadcrumb-item.active {
            color: var(--text-light);
        }

        /* ===== Hero Banner ===== */
        .features-hero {
            padding: 80px 0 100px;
            background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-section) 50%, var(--bg-dark) 100%);
            position: relative;
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }
        .features-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .features-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(253, 121, 168, 0.10) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .features-hero .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.10;
            mix-blend-mode: overlay;
            pointer-events: none;
        }
        .features-hero .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .features-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(108, 92, 231, 0.20);
            border: 1px solid rgba(108, 92, 231, 0.30);
            padding: 6px 20px;
            border-radius: 100px;
            font-size: 0.85rem;
            color: var(--primary-light);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .features-hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .features-hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .features-hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 720px;
            margin: 0 auto 30px;
            line-height: 1.8;
        }
        .features-hero .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 30px;
        }
        .features-hero .hero-stats .stat-item {
            text-align: center;
        }
        .features-hero .hero-stats .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            display: block;
            line-height: 1.2;
        }
        .features-hero .hero-stats .stat-number .accent {
            color: var(--secondary);
        }
        .features-hero .hero-stats .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .features-hero {
                padding: 60px 0 70px;
                min-height: auto;
            }
            .features-hero h1 {
                font-size: 2rem;
            }
            .features-hero p {
                font-size: 1rem;
            }
            .features-hero .hero-stats {
                gap: 24px;
            }
            .features-hero .hero-stats .stat-number {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .features-hero h1 {
                font-size: 1.6rem;
            }
            .features-hero .hero-stats {
                gap: 16px;
            }
            .features-hero .hero-stats .stat-number {
                font-size: 1.3rem;
            }
        }

        /* ===== 板块通用 ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-padding-sm {
            padding: 50px 0;
        }
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 50px;
            line-height: 1.7;
        }
        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(108, 92, 231, 0.15);
            border: 1px solid rgba(108, 92, 231, 0.20);
            padding: 4px 16px;
            border-radius: 100px;
            font-size: 0.8rem;
            color: var(--primary-light);
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 30px;
            }
        }

        /* ===== 功能特色卡片网格 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-light);
            box-shadow: var(--shadow-md);
            background: var(--bg-card-hover);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card .icon-box {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: #fff;
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 4px 15px rgba(108, 92, 231, 0.30);
        }
        .feature-card .icon-box.pink {
            background: linear-gradient(135deg, var(--secondary), #e84393);
        }
        .feature-card .icon-box.teal {
            background: linear-gradient(135deg, var(--accent), #00b894);
        }
        .feature-card .icon-box.amber {
            background: linear-gradient(135deg, #fdcb6e, #e17055);
        }
        .feature-card .icon-box.purple {
            background: linear-gradient(135deg, #a29bfe, #6c5ce7);
        }
        .feature-card .icon-box.rose {
            background: linear-gradient(135deg, #fd79a8, #d63031);
        }
        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .feature-card .feature-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary-light);
            background: rgba(108, 92, 231, 0.15);
            border: 1px solid rgba(108, 92, 231, 0.20);
            margin-right: 6px;
            margin-bottom: 6px;
        }

        @media (max-width: 992px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 576px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 28px 20px 24px;
            }
            .feature-card h3 {
                font-size: 1.1rem;
            }
        }

        /* ===== 图文交错区块 ===== */
        .alternating-section {
            background: var(--bg-section);
        }
        .alt-row {
            display: flex;
            align-items: center;
            gap: 50px;
            margin-bottom: 60px;
        }
        .alt-row:last-child {
            margin-bottom: 0;
        }
        .alt-row.reverse {
            flex-direction: row-reverse;
        }
        .alt-row .alt-image {
            flex: 0 0 48%;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            min-height: 280px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .alt-row .alt-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .alt-row .alt-image:hover img {
            transform: scale(1.03);
        }
        .alt-row .alt-text {
            flex: 1;
        }
        .alt-row .alt-text .alt-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(108, 92, 231, 0.15);
            border: 1px solid rgba(108, 92, 231, 0.20);
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.75rem;
            color: var(--primary-light);
            margin-bottom: 12px;
        }
        .alt-row .alt-text h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .alt-row .alt-text p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .alt-row .alt-text .alt-list {
            padding: 0;
            margin: 0 0 20px;
        }
        .alt-row .alt-text .alt-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .alt-row .alt-text .alt-list li i {
            color: var(--accent);
            font-size: 1rem;
            margin-top: 4px;
            flex-shrink: 0;
        }

        @media (max-width: 992px) {
            .alt-row {
                flex-direction: column;
                gap: 30px;
                margin-bottom: 40px;
            }
            .alt-row.reverse {
                flex-direction: column;
            }
            .alt-row .alt-image {
                flex: none;
                width: 100%;
                min-height: 220px;
            }
            .alt-row .alt-text h2 {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 576px) {
            .alt-row .alt-text h2 {
                font-size: 1.3rem;
            }
            .alt-row .alt-text p {
                font-size: 0.92rem;
            }
        }

        /* ===== 数据面板 ===== */
        .stats-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }
        .stats-panel .stat-item {
            padding: 10px;
        }
        .stats-panel .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stats-panel .stat-label {
            font-size: 0９5rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .stats-panel {
                grid-template-columns: repeat(2, 1fr);
                padding: 30px 20px;
                gap: 16px;
            }
            .stats-panel .stat-number {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .stats-panel {
                grid-template-columns: 1fr 1fr;
                padding: 24px 16px;
            }
            .stats-panel .stat-number {
                font-size: 1.6rem;
            }
        }

        /* ===== 技术架构卡片 ===== */
        .tech-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .tech-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: var(--transition);
        }
        .tech-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .tech-card .tech-icon {
            font-size: 2.2rem;
            margin-bottom: 16px;
            color: var(--primary-light);
        }
        .tech-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .tech-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        @media (max-width: 992px) {
            .tech-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 576px) {
            .tech-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .tech-card {
                padding: 20px 16px;
            }
            .tech-card .tech-icon {
                font-size: 1.6rem;
            }
            .tech-card h4 {
                font-size: 1rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-section);
        }
        .faq-accordion .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .faq-accordion .accordion-button {
            background: var(--bg-card);
            color: var(--text-white);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 18px 24px;
            border: none;
            box-shadow: none;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--bg-card-hover);
            color: var(--primary-light);
        }
        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23a29bfe'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.25);
        }
        .faq-accordion .accordion-body {
            background: var(--bg-card);
            color: var(--text-muted);
            padding: 0 24px 20px;
            font-size: 0.95rem;
            line-height: 1.7;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-darker), var(--bg-section));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-box {
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.12), rgba(253, 121, 168, 0.08));
            border: 1px solid rgba(108, 92, 231, 0.25);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            position: relative;
            z-index: 2;
        }
        .cta-box p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 30px;
            position: relative;
            z-index: 2;
        }
        .cta-box .btn-group {
            position: relative;
            z-index: 2;
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            border: none;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.30);
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 35px rgba(108, 92, 231, 0.45);
            color: #fff;
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-light);
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .btn-outline-custom:hover {
            background: rgba(108, 92, 231, 0.15);
            border-color: var(--primary-light);
            color: var(--text-white);
            transform: translateY(-3px);
        }

        @media (max-width: 768px) {
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .btn-primary-custom,
            .btn-outline-custom {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 0;
            color: var(--text-muted);
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .site-footer .footer-desc {
            font-size: 0.92rem;
            line-height: 1.7;
            color: var(--text-muted);
            margin-bottom: 20px;
            max-width: 360px;
        }
        .site-footer .social-links {
            display: flex;
            gap: 12px;
        }
        .site-footer .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(108, 92, 231, 0.12);
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .site-footer .social-links a:hover {
            background: rgba(108, 92, 231, 0.25);
            color: var(--primary-light);
            border-color: var(--border-light);
            transform: translateY(-3px);
        }
        .site-footer h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-links li {
            margin-bottom: 10px;
        }
        .site-footer .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .site-footer .footer-links i {
            width: 18px;
            color: var(--primary-light);
        }
        .site-footer .footer-bottom {
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid var(--border-color);
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .site-footer .footer-bottom p {
            margin: 0;
        }

        @media (max-width: 768px) {
            .site-footer {
                padding: 40px 0 0;
            }
            .site-footer .footer-brand {
                font-size: 1.15rem;
            }
            .site-footer .footer-desc {
                max-width: 100%;
            }
        }

        /* ===== 额外辅助 ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .gap-1 {
            gap: 4px;
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .mt-2 {
            margin-top: 8px;
        }
        .mt-3 {
            margin-top: 16px;
        }
        .mt-4 {
            margin-top: 24px;
        }
        .mb-2 {
            margin-bottom: 8px;
        }
        .mb-3 {
            margin-bottom: 16px;
        }
        .mb-4 {
            margin-bottom: 24px;
        }
        .text-center {
            text-align: center;
        }
        .text-muted {
            color: var(--text-muted) !important;
        }
        .w-100 {
            width: 100%;
        }
        .d-flex {
            display: flex;
        }
        .align-items-center {
            align-items: center;
        }
        .justify-content-center {
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* focus-visible 可访问性 */
        :focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* 滚动条美化 */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--border-light);
        }

        /* 图片占位背景（防止加载闪烁） */
        .alt-image,
        .feature-card .card-img-top {
            background: var(--bg-card);
        }

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --primary: #4f46e5;
            --primary-dark: #3730a3;
            --primary-light: #818cf8;
            --primary-bg: #eef2ff;
            --secondary: #0ea5e9;
            --secondary-dark: #0284c7;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --success: #10b981;
            --danger: #ef4444;
            --dark: #0f172a;
            --dark-2: #1e293b;
            --gray-900: #111827;
            --gray-800: #1f2937;
            --gray-700: #374151;
            --gray-600: #4b5563;
            --gray-500: #6b7280;
            --gray-400: #9ca3af;
            --gray-300: #d1d5db;
            --gray-200: #e5e7eb;
            --gray-100: #f3f4f6;
            --gray-50: #f9fafb;
            --white: #ffffff;
            --body-bg: #f8fafc;
            --body-color: #1e293b;
            --muted-color: #64748b;
            --border-color: #e2e8f0;
            --border-radius: 12px;
            --border-radius-sm: 8px;
            --border-radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1280px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--body-color);
            background: var(--body-bg);
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius-sm);
        }

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

        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--dark);
            margin-bottom: 0.5rem;
        }

        p {
            margin-bottom: 1rem;
            color: var(--gray-600);
        }

        .container {
            max-width: var(--container-max);
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== Header / Navbar ===== */
        .site-header {
            background: var(--white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1080;
            box-shadow: var(--shadow-sm);
            backdrop-filter: blur(12px);
            background: rgba(255, 255, 255, 0.96);
        }

        .site-header .navbar {
            padding-top: 0;
            padding-bottom: 0;
            min-height: 68px;
        }

        .navbar-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 12px 0;
        }
        .navbar-brand:hover {
            color: var(--primary);
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            border-radius: 10px;
            box-shadow: 0 2px 8px rgba(79, 70, 229, 0.35);
        }

        .navbar-nav .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--gray-700);
            padding: 8px 16px !important;
            border-radius: var(--border-radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
            color: #fff !important;
            padding: 8px 22px !important;
            border-radius: 50px !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4) !important;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary)) !important;
        }
        .nav-cta i {
            font-size: 0.8rem;
        }

        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 1.4rem;
            color: var(--gray-700);
            padding: 6px 10px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .navbar-toggler:hover {
            background: var(--gray-100);
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary-light);
        }

        /* ===== Hero Banner ===== */
        .help-hero {
            position: relative;
            padding: 80px 0 70px;
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #3730a3 70%, #4f46e5 100%);
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .help-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .help-hero::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(129, 140, 248, 0.3) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .help-hero .container {
            position: relative;
            z-index: 2;
        }
        .help-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -1px;
            margin-bottom: 12px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        .help-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin-bottom: 24px;
        }
        .help-hero .hero-search {
            max-width: 560px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 60px;
            padding: 6px 6px 6px 20px;
            display: flex;
            align-items: center;
        }
        .help-hero .hero-search input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 12px 8px;
            font-size: 1rem;
            color: #fff;
            outline: none;
        }
        .help-hero .hero-search input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }
        .help-hero .hero-search button {
            background: var(--white);
            color: var(--primary);
            border: none;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .help-hero .hero-search button:hover {
            background: var(--primary);
            color: #fff;
            transform: scale(1.02);
        }

        .help-hero .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        .help-hero .hero-badges span {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: rgba(255, 255, 255, 0.9);
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
        }

        /* ===== Section Common ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
            letter-spacing: -0.5px;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--muted-color);
            max-width: 620px;
            margin-bottom: 40px;
        }
        .section-title-center {
            text-align: center;
        }
        .section-sub-center {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Quick Help Cards ===== */
        .quick-help-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .quick-help-card {
            background: var(--white);
            border-radius: var(--border-radius);
            padding: 28px 20px 24px;
            text-align: center;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            cursor: default;
        }
        .quick-help-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .quick-help-card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .quick-help-card:hover .icon-wrap {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .quick-help-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--dark);
        }
        .quick-help-card p {
            font-size: 0.88rem;
            color: var(--gray-500);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== Guide Steps ===== */
        .guide-steps {
            background: var(--white);
            border-radius: var(--border-radius-lg);
            box-shadow: var(--shadow-md);
            padding: 48px 40px;
            border: 1px solid var(--border-color);
        }
        .step-item {
            display: flex;
            gap: 20px;
            padding: 24px 0;
            border-bottom: 1px solid var(--gray-100);
        }
        .step-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .step-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
        }
        .step-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--dark);
        }
        .step-content p {
            font-size: 0.95rem;
            color: var(--gray-600);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--white);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .faq-accordion .accordion-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-accordion .accordion-button {
            font-size: 1rem;
            font-weight: 600;
            color: var(--dark);
            background: var(--white);
            padding: 18px 24px;
            border: none;
            box-shadow: none !important;
            transition: var(--transition);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .faq-accordion .accordion-button::after {
            background-size: 1rem;
            transition: var(--transition);
        }
        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--gray-600);
            line-height: 1.8;
            background: var(--white);
        }
        .faq-accordion .accordion-body strong {
            color: var(--dark);
        }

        /* ===== Category Tags ===== */
        .category-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 32px;
            justify-content: center;
        }
        .category-tags .tag {
            padding: 6px 18px;
            border-radius: 30px;
            background: var(--white);
            border: 1px solid var(--border-color);
            color: var(--gray-600);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            cursor: pointer;
        }
        .category-tags .tag:hover,
        .category-tags .tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
            transform: translateY(-2px);
        }

        /* ===== Help Articles ===== */
        .help-article-card {
            background: var(--white);
            border-radius: var(--border-radius);
            border: 1px solid var(--border-color);
            padding: 24px 24px 20px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .help-article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .help-article-card .article-icon {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .help-article-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--dark);
        }
        .help-article-card p {
            font-size: 0.9rem;
            color: var(--gray-500);
            margin-bottom: 12px;
            flex: 1;
        }
        .help-article-card .article-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--gray-400);
            border-top: 1px solid var(--gray-100);
            padding-top: 12px;
            margin-top: auto;
        }
        .help-article-card .article-meta a {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.88rem;
        }
        .help-article-card .article-meta a:hover {
            color: var(--primary-dark);
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4f46e5 100%);
            border-radius: var(--border-radius-lg);
            padding: 56px 48px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-block .container {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-block p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 28px;
        }
        .cta-block .btn-cta-light {
            background: #fff;
            color: var(--primary);
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
            transition: var(--transition);
        }
        .cta-block .btn-cta-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
            background: var(--primary-light);
            color: #fff;
        }
        .cta-block .btn-cta-outline {
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            border: 2px solid rgba(255, 255, 255, 0.4);
            transition: var(--transition);
            margin-left: 12px;
        }
        .cta-block .btn-cta-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-footer .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 1.1rem;
        }
        .site-footer .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            max-width: 320px;
            margin-bottom: 18px;
            line-height: 1.7;
        }
        .site-footer .social-links {
            display: flex;
            gap: 12px;
        }
        .site-footer .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.2rem;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.05);
        }
        .site-footer .social-links a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(79, 70, 229, 0.35);
        }
        .site-footer h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-links li {
            margin-bottom: 10px;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer .footer-links a:hover {
            color: #fff;
            transform: translateX(4px);
        }
        .site-footer .footer-links i {
            width: 18px;
            color: var(--primary-light);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
            margin-top: 40px;
            text-align: center;
        }
        .site-footer .footer-bottom p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            margin-bottom: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .quick-help-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .help-hero h1 {
                font-size: 2.2rem;
            }
            .cta-block {
                padding: 40px 28px;
            }
        }

        @media (max-width: 768px) {
            .help-hero {
                padding: 60px 0 50px;
                min-height: auto;
            }
            .help-hero h1 {
                font-size: 1.8rem;
            }
            .help-hero p {
                font-size: 1rem;
            }
            .help-hero .hero-search {
                flex-direction: column;
                background: transparent;
                border: none;
                padding: 0;
                gap: 10px;
            }
            .help-hero .hero-search input {
                background: rgba(255, 255, 255, 0.15);
                border-radius: 40px;
                padding: 12px 20px;
                width: 100%;
                border: 1px solid rgba(255, 255, 255, 0.2);
            }
            .help-hero .hero-search button {
                width: 100%;
                justify-content: center;
            }
            .help-hero .hero-badges {
                justify-content: center;
            }
            .section-padding {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .guide-steps {
                padding: 28px 20px;
            }
            .step-item {
                flex-direction: column;
                gap: 12px;
                padding: 18px 0;
            }
            .quick-help-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .quick-help-card {
                padding: 20px 14px;
            }
            .quick-help-card .icon-wrap {
                width: 44px;
                height: 44px;
                font-size: 1.2rem;
            }
            .cta-block {
                padding: 36px 20px;
                text-align: center;
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .cta-block .btn-cta-outline {
                margin-left: 0;
                margin-top: 10px;
                display: block;
                width: 100%;
            }
            .cta-block .btn-cta-light {
                width: 100%;
            }
            .category-tags .tag {
                font-size: 0.82rem;
                padding: 4px 14px;
            }
            .help-article-card {
                padding: 18px 16px;
            }
            .site-footer .footer-brand {
                font-size: 1.2rem;
            }
            .navbar-nav .nav-link.active::after {
                display: none;
            }
            .navbar-nav .nav-link {
                padding: 10px 16px !important;
                border-radius: 8px;
            }
            .nav-cta {
                margin-top: 8px;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .help-hero h1 {
                font-size: 1.5rem;
            }
            .quick-help-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .quick-help-card {
                padding: 16px 10px;
            }
            .quick-help-card h4 {
                font-size: 0.92rem;
            }
            .quick-help-card p {
                font-size: 0.8rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .guide-steps {
                padding: 20px 14px;
            }
            .step-content h4 {
                font-size: 1rem;
            }
            .step-content p {
                font-size: 0.88rem;
            }
            .help-article-card h4 {
                font-size: 0.95rem;
            }
            .faq-accordion .accordion-button {
                font-size: 0.92rem;
                padding: 14px 16px;
            }
            .faq-accordion .accordion-body {
                padding: 0 16px 16px;
                font-size: 0.88rem;
            }
            .cta-block h2 {
                font-size: 1.3rem;
            }
            .cta-block p {
                font-size: 0.92rem;
            }
        }

        /* ===== Helper ===== */
        .mb-0 {
            margin-bottom: 0;
        }
        .gap-1 {
            gap: 0.25rem;
        }
        .gap-2 {
            gap: 0.5rem;
        }