/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0d1b2a;
            --primary-light: #1b3a4b;
            --accent: #f0a500;
            --accent-hover: #d49400;
            --secondary: #00b4d8;
            --secondary-hover: #0096b8;
            --bg: #f4f6f8;
            --bg-card: #ffffff;
            --bg-dark: #0d1b2a;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #e2e6ea;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
        }

        /* ===== Base / Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--primary); }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

        /* ===== Navbar ===== */
        .site-header {
            background: var(--bg-card);
            box-shadow: 0 2px 16px rgba(0,0,0,0.04);
            position: sticky;
            top: 0;
            z-index: 1050;
            border-bottom: 1px solid var(--border);
        }
        .navbar {
            padding: 12px 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary) !important;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-brand i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        .navbar-brand span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-pills-custom {
            display: flex;
            gap: 4px;
            align-items: center;
        }
        .nav-pills-custom .nav-link {
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: var(--transition);
            background: transparent;
            border: 1px solid transparent;
        }
        .nav-pills-custom .nav-link:hover {
            color: var(--primary);
            background: rgba(13,27,42,0.04);
            border-color: var(--border);
        }
        .nav-pills-custom .nav-link.active {
            color: var(--text-white) !important;
            background: var(--primary) !important;
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(13,27,42,0.2);
        }
        .nav-cta {
            background: var(--accent) !important;
            color: var(--primary) !important;
            border-color: var(--accent) !important;
            font-weight: 700 !important;
            padding: 8px 24px !important;
            border-radius: 50px !important;
            box-shadow: 0 4px 12px rgba(240,165,0,0.3);
        }
        .nav-cta:hover {
            background: var(--accent-hover) !important;
            box-shadow: 0 6px 20px rgba(240,165,0,0.4);
            transform: translateY(-1px);
        }
        .navbar-toggler {
            border: none;
            padding: 8px;
            color: var(--primary);
            font-size: 1.5rem;
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(13,27,42,0.92), rgba(27,58,75,0.85)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: var(--text-white);
            padding: 60px 0;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg), transparent);
            pointer-events: none;
        }
        .hero-content {
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(240,165,0,0.2);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(240,165,0,0.3);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 20px;
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .hero h1 span {
            color: var(--accent);
            position: relative;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.8);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-accent {
            background: var(--accent);
            color: var(--primary) !important;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            transition: var(--transition);
            box-shadow: 0 6px 24px rgba(240,165,0,0.35);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(240,165,0,0.45);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-white) !important;
            border: 2px solid rgba(255,255,255,0.4);
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.1);
            border-color: var(--text-white);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            justify-content: center;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent);
            display: block;
        }
        .hero-stat .label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            margin-top: 4px;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            text-align: center;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto 48px;
            text-align: center;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 0 auto 24px;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        /* ===== Cards ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow);
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(240,165,0,0.2);
        }
        .card-custom .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border);
        }
        .card-custom .card-body {
            padding: 24px;
        }
        .card-custom .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .card-custom .card-text {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .card-custom .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .card-custom .badge-tag {
            background: rgba(240,165,0,0.12);
            color: var(--accent-hover);
            padding: 4px 14px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.8rem;
        }

        /* ===== Category Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            box-shadow: var(--shadow);
            text-align: center;
            padding: 32px 20px;
            height: 100%;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(240,165,0,0.2);
        }
        .category-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(240,165,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.8rem;
            color: var(--accent);
        }
        .category-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .category-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 16px;
        }
        .category-card .btn-sm {
            padding: 6px 20px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            background: var(--primary);
            color: var(--text-white);
            border: none;
            transition: var(--transition);
        }
        .category-card .btn-sm:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        /* ===== Latest Posts List ===== */
        .post-list {
            display: grid;
            gap: 20px;
        }
        .post-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            transition: var(--transition);
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }
        .post-item:hover {
            border-color: rgba(240,165,0,0.2);
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
        }
        .post-item .post-index {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: var(--text-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .post-item .post-content {
            flex: 1;
        }
        .post-item .post-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
            transition: var(--transition);
        }
        .post-item .post-title:hover {
            color: var(--accent-hover);
        }
        .post-item .post-excerpt {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.5;
            margin-bottom: 6px;
        }
        .post-item .post-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .post-item .post-meta i {
            margin-right: 4px;
        }

        /* ===== Features / Icons ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 28px;
        }
        .feature-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .feature-item .f-icon {
            font-size: 2.4rem;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .feature-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .feature-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== Stats ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 24px;
            background: var(--bg-dark);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            color: var(--text-white);
        }
        .stats-row .stat-item {
            text-align: center;
        }
        .stats-row .stat-item .num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            display: block;
        }
        .stats-row .stat-item .label {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.65);
            margin-top: 4px;
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            position: relative;
            transition: var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: var(--text-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 16px;
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(240,165,0,0.15);
            box-shadow: var(--shadow);
        }
        .faq-item .faq-q {
            font-weight: 700;
            color: var(--primary);
            font-size: 1.05rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }
        .faq-item .faq-q i {
            color: var(--accent);
            transition: var(--transition);
        }
        .faq-item .faq-a {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-light)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            color: var(--text-white);
            margin: 0 20px;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn-cta {
            background: var(--accent);
            color: var(--primary) !important;
            padding: 16px 44px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            border: none;
            transition: var(--transition);
            box-shadow: 0 6px 24px rgba(240,165,0,0.35);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(240,165,0,0.45);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 24px;
            margin-top: 80px;
        }
        .site-footer .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-footer .footer-brand i {
            color: var(--accent);
        }
        .site-footer p {
            font-size: 0.95rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .site-footer h5 {
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 16px;
        }
        .site-footer a {
            color: rgba(255,255,255,0.6);
            font-size: 0.95rem;
            transition: var(--transition);
            display: block;
            padding: 4px 0;
        }
        .site-footer a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .site-footer .social-links {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .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: var(--text-white);
            font-size: 1.1rem;
            transition: var(--transition);
            padding: 0;
        }
        .site-footer .social-links a:hover {
            background: var(--accent);
            color: var(--primary);
            padding: 0;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            margin-top: 32px;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }

        /* ===== Empty State ===== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-light);
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .empty-state i {
            font-size: 3rem;
            color: var(--border);
            margin-bottom: 16px;
        }
        .empty-state p {
            font-size: 1rem;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.6rem; }
            .section-title { font-size: 1.9rem; }
            .cta-section { padding: 48px 24px; }
            .cta-section h2 { font-size: 1.8rem; }
        }
        @media (max-width: 768px) {
            .hero { min-height: 70vh; padding: 40px 0; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 24px; }
            .hero-stat .num { font-size: 1.6rem; }
            .section { padding: 56px 0; }
            .section-title { font-size: 1.6rem; }
            .stats-row { grid-template-columns: repeat(2, 1fr); gap: 16px; padding: 32px 20px; }
            .stats-row .stat-item .num { font-size: 2rem; }
            .category-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
            .features-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
            .steps-grid { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
            .post-item { flex-direction: column; gap: 12px; padding: 16px; }
            .post-item .post-index { width: 28px; height: 28px; font-size: 0.8rem; }
            .cta-section { margin: 0 12px; padding: 40px 20px; }
            .cta-section h2 { font-size: 1.5rem; }
            .navbar-brand { font-size: 1.2rem; }
            .nav-pills-custom { gap: 2px; }
            .nav-pills-custom .nav-link { padding: 6px 14px; font-size: 0.85rem; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.6rem; }
            .hero-actions { flex-direction: column; align-items: center; }
            .btn-accent, .btn-outline-light { width: 100%; justify-content: center; }
            .section-title { font-size: 1.3rem; }
            .stats-row { grid-template-columns: 1fr 1fr; gap: 12px; padding: 24px 16px; }
            .stats-row .stat-item .num { font-size: 1.6rem; }
            .category-grid { grid-template-columns: 1fr; }
            .features-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .faq-item { padding: 16px; }
            .cta-section { padding: 32px 16px; }
            .cta-section h2 { font-size: 1.3rem; }
            .site-footer .footer-brand { font-size: 1.1rem; }
        }

        /* ===== Utilities ===== */
        .text-accent { color: var(--accent); }
        .bg-soft-accent { background: rgba(240,165,0,0.06); }
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 16px; }
        .mt-2 { margin-top: 8px; }
        .mt-3 { margin-top: 16px; }
        .mb-2 { margin-bottom: 8px; }
        .mb-3 { margin-bottom: 16px; }
        .mb-4 { margin-bottom: 24px; }
        .mb-5 { margin-bottom: 48px; }
        .text-center { text-align: center; }
        .fw-bold { font-weight: 700; }
        .btn:focus, .form-control:focus { box-shadow: 0 0 0 3px rgba(240,165,0,0.2); outline: none; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #D4A43A;
            --primary-dark: #B88A2E;
            --primary-light: #E8C56A;
            --secondary: #1A1A2E;
            --accent: #E94560;
            --bg-dark: #0F0F1A;
            --bg-card: #1A1A2E;
            --bg-body: #0A0A14;
            --bg-section: #111122;
            --text-light: #F5F5F5;
            --text-muted: #A0A0B8;
            --text-dark: #E0E0E0;
            --border-color: #2A2A42;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 8px 32px rgba(0,0,0,0.4);
            --shadow-sm: 0 4px 16px rgba(0,0,0,0.3);
            --shadow-glow: 0 0 30px rgba(212,164,58,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
        }

        /* ===== Reset ===== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-main);
            background-color: var(--bg-body);
            color: var(--text-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-light);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea, select {
            font-family: inherit;
            outline: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            padding: 0 20px;
            margin: 0 auto;
        }

        /* ===== 导航 ===== */
        .site-header {
            background: rgba(15, 15, 26, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: 8px 0;
            transition: var(--transition);
        }
        .site-header .navbar {
            padding: 0;
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 1px;
            transition: var(--transition);
        }
        .site-header .navbar-brand i {
            font-size: 1.8rem;
            color: var(--primary);
            filter: drop-shadow(0 0 8px rgba(212,164,58,0.3));
        }
        .site-header .navbar-brand span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-header .navbar-brand:hover {
            transform: scale(1.02);
        }
        .nav-pills-custom {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-pills-custom .nav-item .nav-link {
            color: var(--text-muted);
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            font-size: 0.95rem;
            position: relative;
        }
        .nav-pills-custom .nav-item .nav-link:hover {
            color: var(--text-light);
            background: rgba(212, 164, 58, 0.08);
        }
        .nav-pills-custom .nav-item .nav-link.active {
            color: var(--primary);
            background: rgba(212, 164, 58, 0.12);
            box-shadow: inset 0 -2px 0 var(--primary);
        }
        .nav-pills-custom .nav-item .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            padding: 8px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
            box-shadow: 0 4px 16px rgba(212,164,58,0.25);
        }
        .nav-pills-custom .nav-item .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(212,164,58,0.35);
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }
        .navbar-toggler {
            border: 1px solid var(--border-color);
            padding: 8px 12px;
            color: var(--text-light);
            background: transparent;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(212,164,58,0.2);
        }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--secondary) 100%);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
            pointer-events: none;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-banner .breadcrumb {
            background: transparent;
            padding: 0;
            margin-bottom: 20px;
            font-size: 0.9rem;
        }
        .article-banner .breadcrumb-item a {
            color: var(--text-muted);
        }
        .article-banner .breadcrumb-item a:hover {
            color: var(--primary);
        }
        .article-banner .breadcrumb-item.active {
            color: var(--primary-light);
        }
        .article-banner .breadcrumb-item + .breadcrumb-item::before {
            color: var(--text-muted);
            content: '›';
        }
        .article-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-light);
            margin-bottom: 16px;
            max-width: 900px;
        }
        .article-banner .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .article-banner .article-meta i {
            color: var(--primary);
            margin-right: 6px;
            width: 16px;
        }
        .article-banner .article-meta .badge-category {
            background: rgba(212,164,58,0.15);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(212,164,58,0.2);
        }

        /* ===== 文章正文 ===== */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 48px 50px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
        }
        .article-content .post-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-dark);
        }
        .article-content .post-body p {
            margin-bottom: 1.4em;
        }
        .article-content .post-body h2,
        .article-content .post-body h3 {
            color: var(--text-light);
            font-weight: 700;
            margin-top: 1.6em;
            margin-bottom: 0.8em;
        }
        .article-content .post-body h2 {
            font-size: 1.6rem;
        }
        .article-content .post-body h3 {
            font-size: 1.25rem;
        }
        .article-content .post-body ul,
        .article-content .post-body ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
        }
        .article-content .post-body li {
            margin-bottom: 0.5em;
        }
        .article-content .post-body a {
            color: var(--primary);
            border-bottom: 1px solid rgba(212,164,58,0.3);
        }
        .article-content .post-body a:hover {
            border-bottom-color: var(--primary);
        }
        .article-content .post-body img {
            border-radius: var(--radius);
            margin: 1.5em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content .post-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 1.5em 0;
            background: rgba(212,164,58,0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-content .post-body code {
            background: rgba(212,164,58,0.1);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-light);
        }

        /* ===== 文章底部 ===== */
        .article-footer-bar {
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-tags .tag {
            background: rgba(212,164,58,0.08);
            color: var(--text-muted);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: rgba(212,164,58,0.15);
            color: var(--primary);
            border-color: rgba(212,164,58,0.3);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .article-share .share-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-dark);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-share .share-link:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== 内容未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--primary);
            margin-bottom: 24px;
            opacity: 0.5;
        }
        .not-found-box h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-muted);
            font-size: 1.05rem;
            margin-bottom: 28px;
        }
        .not-found-box .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
            border: none;
        }
        .not-found-box .btn-home:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(212,164,58,0.3);
            color: #fff;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
            margin-top: 0;
        }
        .site-footer .footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .site-footer .footer-brand i {
            font-size: 1.6rem;
        }
        .site-footer p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .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: var(--bg-card);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .site-footer .social-links a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(212,164,58,0.2);
        }
        .site-footer h5 {
            color: var(--text-light);
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .site-footer .col-md-2 a,
        .site-footer .col-md-3 a,
        .site-footer .col-md-4 a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .site-footer .col-md-2 a:hover,
        .site-footer .col-md-3 a:hover,
        .site-footer .col-md-4 a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
            letter-spacing: 0.3px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-content {
                padding: 36px 32px;
            }
            .article-banner h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .site-header .navbar-brand {
                font-size: 1.3rem;
            }
            .site-header .navbar-brand i {
                font-size: 1.4rem;
            }
            .nav-pills-custom {
                gap: 2px;
                padding: 12px 0 6px;
            }
            .nav-pills-custom .nav-item .nav-link {
                padding: 6px 14px;
                font-size: 0.88rem;
            }
            .nav-pills-custom .nav-item .nav-cta {
                padding: 6px 18px;
                font-size: 0.88rem;
                margin-top: 4px;
            }
            .article-banner {
                padding: 60px 0 40px;
            }
            .article-banner h1 {
                font-size: 1.5rem;
            }
            .article-banner .article-meta {
                font-size: 0.85rem;
                gap: 12px;
            }
            .article-main {
                padding: 40px 0 60px;
            }
            .article-content {
                padding: 28px 20px;
            }
            .article-content .post-body {
                font-size: 0.98rem;
            }
            .article-content .post-body h2 {
                font-size: 1.35rem;
            }
            .article-content .post-body h3 {
                font-size: 1.1rem;
            }
            .article-footer-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .site-footer {
                padding: 40px 0 20px;
            }
            .site-footer .footer-brand {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-banner h1 {
                font-size: 1.25rem;
            }
            .article-content {
                padding: 20px 16px;
                border-radius: var(--radius);
            }
            .article-content .post-body {
                font-size: 0.92rem;
            }
            .article-content .post-body h2 {
                font-size: 1.2rem;
            }
            .article-banner .article-meta {
                flex-wrap: wrap;
                gap: 8px;
            }
            .nav-pills-custom .nav-item .nav-link {
                padding: 5px 10px;
                font-size: 0.82rem;
            }
            .nav-pills-custom .nav-item .nav-cta {
                padding: 5px 14px;
                font-size: 0.82rem;
            }
            .site-footer .social-links a {
                width: 34px;
                height: 34px;
                font-size: 0.95rem;
            }
        }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #1a73e8;
            --primary-dark: #0d47a1;
            --primary-light: #e8f0fe;
            --secondary: #f5a623;
            --secondary-dark: #d4891a;
            --accent: #34a853;
            --bg-body: #f8f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0b1a2e;
            --bg-card: #ffffff;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-muted: #8a9aaa;
            --text-white: #ffffff;
            --border-color: #e2e8f0;
            --border-light: #f0f2f5;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.12);
            --font-base: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --spacer: 2rem;
        }

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

        body {
            font-family: var(--font-base);
            background-color: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        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-md);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: var(--shadow-sm);
            padding: 0;
            transition: box-shadow var(--transition);
        }
        .site-header:hover {
            box-shadow: var(--shadow-md);
        }

        .site-header .navbar {
            padding: 0.75rem 0;
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .site-header .navbar-brand i {
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .site-header .navbar-brand span {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-header .navbar-brand:hover {
            color: var(--primary-dark);
        }

        .nav-pills-custom {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-pills-custom .nav-link {
            padding: 0.5rem 1.1rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-pills-custom .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-pills-custom .nav-link.active {
            color: var(--text-white);
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(26, 115, 232, 0.35);
        }
        .nav-pills-custom .nav-link.active:hover {
            color: var(--text-white);
            background: var(--primary-dark);
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark)) !important;
            color: #fff !important;
            border-radius: 50px !important;
            padding: 0.5rem 1.4rem !important;
            font-weight: 700 !important;
            box-shadow: 0 4px 14px rgba(245, 166, 35, 0.35);
            transition: all var(--transition) !important;
        }
        .nav-cta i {
            margin-right: 0.3rem;
            font-size: 0.85rem;
        }
        .nav-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 24px rgba(245, 166, 35, 0.45) !important;
            color: #fff !important;
        }

        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 1.5rem;
            color: var(--text-primary);
            padding: 0.25rem 0.5rem;
            border-radius: var(--radius-sm);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.25);
            outline: none;
        }

        /* ===== 页面 Banner ===== */
        .page-banner {
            position: relative;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #132a4a 100%);
            padding: 5rem 0 4rem;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') no-repeat center center / cover;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(26, 115, 232, 0.15), transparent 70%);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 0.75rem;
        }
        .page-banner h1 i {
            color: var(--secondary);
            margin-right: 0.4rem;
        }
        .page-banner .lead {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            margin-bottom: 0;
        }
        .page-banner .breadcrumb-custom {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            list-style: none;
            padding: 0;
            margin: 0 0 1.2rem 0;
            font-size: 0.9rem;
        }
        .page-banner .breadcrumb-custom li {
            color: rgba(255, 255, 255, 0.6);
        }
        .page-banner .breadcrumb-custom li+li::before {
            content: '/';
            margin-right: 0.5rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .page-banner .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.8);
        }
        .page-banner .breadcrumb-custom a:hover {
            color: var(--secondary);
        }
        .page-banner .breadcrumb-custom .active {
            color: var(--secondary);
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 4.5rem 0;
        }
        .section-block .section-title {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }
        .section-block .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 2.5rem;
        }
        .section-block .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-block .section-header .section-title {
            position: relative;
            display: inline-block;
        }
        .section-block .section-header .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 0.75rem auto 0;
        }

        .bg-white-section {
            background: var(--bg-white);
        }
        .bg-light-section {
            background: var(--bg-body);
        }
        .bg-dark-section {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .bg-dark-section .section-title {
            color: var(--text-white);
        }
        .bg-dark-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 卡片通用 ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .card-custom .card-body {
            padding: 1.5rem;
        }
        .card-custom .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .card-custom .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }
        .card-custom .card-text {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .card-custom .card-meta {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .card-custom .card-meta i {
            margin-right: 0.25rem;
        }

        /* ===== 标签 / Badge ===== */
        .badge-custom {
            display: inline-block;
            padding: 0.3rem 0.9rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
            transition: all var(--transition);
        }
        .badge-custom:hover {
            background: var(--primary);
            color: #fff;
        }
        .badge-hot {
            background: #fef2f2;
            color: #dc2626;
        }
        .badge-hot:hover {
            background: #dc2626;
            color: #fff;
        }
        .badge-new {
            background: #ecfdf5;
            color: #059669;
        }
        .badge-new:hover {
            background: #059669;
            color: #fff;
        }

        /* ===== 步骤 / 流程 ===== */
        .steps-row {
            counter-reset: step;
        }
        .step-item {
            counter-increment: step;
            position: relative;
            padding-left: 3.5rem;
            padding-bottom: 2.5rem;
            border-left: 2px dashed var(--border-color);
        }
        .step-item:last-child {
            border-left: 2px dashed transparent;
            padding-bottom: 0;
        }
        .step-item::before {
            content: counter(step);
            position: absolute;
            left: -1.1rem;
            top: 0;
            width: 2.4rem;
            height: 2.4rem;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
        }
        .step-item h5 {
            font-weight: 700;
            margin-bottom: 0.3rem;
            color: var(--text-primary);
        }
        .step-item p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 1.2rem 0;
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 0;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 1.2rem;
            color: var(--primary);
            transition: transform var(--transition);
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding-top: 0.75rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer p:last-child {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 4rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') no-repeat center center / cover;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.75rem;
            letter-spacing: -0.5px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 600px;
            margin: 0 auto 2rem;
        }
        .cta-btn {
            display: inline-block;
            padding: 0.85rem 2.8rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            background: #fff;
            color: var(--primary) !important;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
            transition: all var(--transition);
        }
        .cta-btn i {
            margin-left: 0.5rem;
            transition: transform var(--transition);
        }
        .cta-btn:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark) !important;
        }
        .cta-btn:hover i {
            transform: translateX(4px);
        }

        /* ===== 底部 Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 0;
        }
        .site-footer .footer-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .site-footer .footer-brand i {
            color: var(--secondary);
        }
        .site-footer p {
            font-size: 0.95rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .site-footer h5 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1.2rem;
            letter-spacing: 0.5px;
        }
        .site-footer a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            padding: 0.25rem 0;
            transition: all var(--transition);
        }
        .site-footer a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .site-footer .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1.25rem;
        }
        .site-footer .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.4rem;
            height: 2.4rem;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            padding: 0;
            transition: all var(--transition);
        }
        .site-footer .social-links a:hover {
            background: var(--secondary);
            color: #fff;
            padding: 0;
            transform: translateY(-3px);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.5rem 0;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .page-banner h1 {
                font-size: 2.2rem;
            }
            .page-banner .lead {
                font-size: 1.05rem;
            }
            .section-block {
                padding: 3.5rem 0;
            }
            .section-block .section-title {
                font-size: 1.6rem;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .nav-pills-custom {
                gap: 0;
            }
            .nav-pills-custom .nav-link {
                padding: 0.4rem 0.9rem;
                font-size: 0.88rem;
            }
        }

        @media (max-width: 767.98px) {
            .site-header .navbar-brand {
                font-size: 1.3rem;
            }
            .site-header .navbar-brand i {
                font-size: 1.3rem;
            }
            .nav-pills-custom {
                flex-direction: column;
                align-items: stretch;
                gap: 0.25rem;
                padding: 0.75rem 0 0.25rem;
            }
            .nav-pills-custom .nav-link {
                border-radius: var(--radius-sm);
                padding: 0.6rem 1rem;
            }
            .nav-pills-custom .nav-link.active {
                border-radius: var(--radius-sm);
            }
            .nav-cta {
                text-align: center;
                margin-top: 0.25rem;
                border-radius: var(--radius-sm) !important;
            }
            .page-banner {
                padding: 3rem 0 2.5rem;
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .page-banner .lead {
                font-size: 0.95rem;
            }
            .section-block {
                padding: 2.5rem 0;
            }
            .section-block .section-title {
                font-size: 1.4rem;
            }
            .section-block .section-subtitle {
                font-size: 0.95rem;
            }
            .card-custom .card-img-top {
                height: 160px;
            }
            .step-item {
                padding-left: 3rem;
                padding-bottom: 1.8rem;
            }
            .step-item::before {
                width: 2rem;
                height: 2rem;
                left: -0.9rem;
                font-size: 0.85rem;
            }
            .cta-section {
                padding: 3rem 0;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
            .cta-btn {
                padding: 0.7rem 2rem;
                font-size: 1rem;
            }
            .site-footer {
                padding: 2.5rem 0 0;
            }
            .site-footer .footer-bottom {
                margin-top: 2rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .page-banner .lead {
                font-size: 0.9rem;
            }
            .section-block .section-title {
                font-size: 1.25rem;
            }
            .card-custom .card-body {
                padding: 1.1rem;
            }
            .card-custom .card-title {
                font-size: 1.05rem;
            }
            .cta-section h2 {
                font-size: 1.3rem;
            }
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        /* ===== 辅助 ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .gap-grid {
            gap: 1.5rem 1rem;
        }
        .shadow-hover {
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .shadow-hover:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .rounded-xl {
            border-radius: var(--radius-lg);
        }
        .mt-section {
            margin-top: 0;
        }

        /* ===== 对比 / 列表增强 ===== */
        .feature-compare {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .feature-compare-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.8rem;
            transition: all var(--transition);
        }
        .feature-compare-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .feature-compare-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feature-compare-item h4 i {
            color: var(--primary);
        }
        .feature-compare-item p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            margin-bottom: 0;
        }

        @media (max-width: 767.98px) {
            .feature-compare {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
        }

        /* ===== 评分条 ===== */
        .rating-bar {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 0.5rem;
        }
        .rating-bar .label {
            min-width: 80px;
            font-weight: 600;
            font-size: 0.92rem;
        }
        .rating-bar .bar-track {
            flex: 1;
            height: 8px;
            background: var(--border-color);
            border-radius: 8px;
            overflow: hidden;
        }
        .rating-bar .bar-fill {
            height: 100%;
            border-radius: 8px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            transition: width 0.8s ease;
        }
        .rating-bar .score {
            min-width: 36px;
            font-weight: 700;
            font-size: 0.92rem;
            color: var(--text-primary);
        }