/* roulang page: index */
:root {
            --primary: #162447;
            --primary-light: #1f3a6b;
            --primary-dark: #0d192e;
            --accent: #fca311;
            --accent-dark: #e09000;
            --accent-light: #fff4e0;
            --bg: #f4f6fa;
            --bg-white: #ffffff;
            --bg-dark: #0d192e;
            --text-main: #1c2430;
            --text-muted: #70809a;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(20, 40, 80, 0.06);
            --shadow: 0 4px 20px rgba(20, 40, 80, 0.08);
            --shadow-lg: 0 14px 44px rgba(20, 40, 80, 0.14);
            --transition: all 0.3s ease;
            --font: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            color: var(--text-main);
            background: var(--bg);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
        }
        button {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 16px rgba(20, 40, 80, 0.05);
        }
        .custom-navbar {
            min-height: 76px;
            padding: 0;
        }
        .custom-navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-link-custom {
            font-weight: 500;
            color: var(--text-main);
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 15px;
            line-height: 1.4;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link-custom:hover {
            color: var(--accent-dark);
            background: var(--accent-light);
        }
        .nav-link-custom.active {
            color: var(--accent-dark);
            background: var(--accent-light);
            font-weight: 600;
        }
        .brand-center {
            font-size: 26px;
            font-weight: 800;
            letter-spacing: 1px;
            background: linear-gradient(135deg, var(--primary) 30%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            position: relative;
            z-index: 2;
        }
        .brand-center:hover {
            opacity: 0.85;
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            border: none;
            border-radius: 50px;
            padding: 10px 26px;
            font-size: 14px;
            line-height: 1.5;
            box-shadow: 0 4px 16px rgba(252, 163, 17, 0.35);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(252, 163, 17, 0.4);
        }
        .btn-accent:focus {
            outline: none;
            box-shadow: 0 0 0 4px rgba(252, 163, 17, 0.25);
        }
        .navbar-toggler {
            border: none;
            padding: 6px 10px;
            border-radius: 8px;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(252, 163, 17, 0.25);
            border: none;
        }
        .mobile-menu {
            padding-top: 8px;
        }
        .mobile-menu-title {
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--text-muted);
            margin-bottom: 10px;
            padding-left: 4px;
        }
        .mobile-nav-link {
            display: block;
            padding: 10px 14px;
            border-radius: 10px;
            font-weight: 500;
            color: var(--text-main);
            margin-bottom: 4px;
        }
        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            background: var(--bg);
            color: var(--accent-dark);
        }
        @media (max-width: 991.98px) {
            .custom-navbar .container {
                justify-content: flex-end;
            }
            .navbar-toggler {
                margin-left: auto;
            }
            .navbar-brand {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }
            .navbar-collapse {
                flex-basis: 100%;
                width: 100%;
            }
        }
        @media (max-width: 520px) {
            .brand-center {
                font-size: 21px;
                letter-spacing: 0.3px;
            }
            .custom-navbar {
                min-height: 64px;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 120px 0 100px;
            background:
                linear-gradient(135deg, rgba(13, 25, 46, 0.92), rgba(22, 36, 71, 0.75)),
                url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, rgba(244, 246, 250, 0.15), transparent);
            pointer-events: none;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 50px;
            padding: 6px 22px;
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.5px;
            color: #f0f2f5;
            margin-bottom: 22px;
            backdrop-filter: blur(6px);
        }
        .hero-title {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: 1px;
            margin-bottom: 20px;
        }
        .hero-subtitle {
            font-size: 18px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            margin: 0 auto;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
            margin-top: 34px;
        }
        .btn-light-custom {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            border-radius: 50px;
            padding: 12px 34px;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            backdrop-filter: blur(6px);
        }
        .btn-light-custom:hover {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
            border-color: #fff;
            transform: translateY(-2px);
        }
        .hero-stats {
            margin-top: 72px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 44px;
        }
        .hero-stat-item {
            text-align: center;
            padding: 12px 16px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }
        .hero-stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }
        .hero-stat-item .stat-num {
            display: block;
            font-size: 36px;
            font-weight: 800;
            color: var(--accent);
        }
        .hero-stat-item .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0 70px;
            }
            .hero-title {
                font-size: 34px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-stats {
                margin-top: 50px;
            }
            .hero-stat-item {
                margin-bottom: 14px;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 28px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 260px;
            }
        }

        /* ===== Section ===== */
        .section {
            padding: 90px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent-dark);
            background: var(--accent-light);
            padding: 6px 18px;
            border-radius: 50px;
            margin-bottom: 16px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--primary);
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.8;
        }
        .text-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }
        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 26px;
            }
        }

        /* ===== Feature Cards ===== */
        .feature-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 26px;
            height: 100%;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent-dark);
            background: var(--accent-light);
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .feature-card {
                padding: 24px 20px;
            }
        }

        /* ===== Category Cards ===== */
        .category-card {
            position: relative;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
        }
        .category-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        .category-card .cat-img-wrap {
            position: relative;
            height: 190px;
            overflow: hidden;
        }
        .category-card .cat-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }
        .category-card:hover .cat-img-wrap img {
            transform: scale(1.06);
        }
        .category-card .cat-img-wrap::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.45), transparent);
        }
        .category-card .cat-body {
            padding: 24px;
            position: relative;
        }
        .category-card .cat-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            border-radius: 50px;
            padding: 4px 16px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .category-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .category-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .category-card .cat-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-dark);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .category-card .cat-link i {
            transition: transform 0.3s ease;
        }
        .category-card .cat-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Stats / Flow ===== */
        .stats-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            padding: 80px 0;
        }
        .stats-section .section-title {
            color: #fff;
        }
        .stats-section .section-desc {
            color: rgba(255, 255, 255, 0.7);
        }
        .stat-card {
            text-align: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius);
            padding: 32px 16px;
            backdrop-filter: blur(8px);
            transition: var(--transition);
            height: 100%;
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }
        .stat-card .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .stat-card .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            margin-top: 8px;
        }
        .flow-step {
            text-align: center;
            padding: 20px;
            position: relative;
        }
        .flow-step .step-number {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            font-size: 22px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 24px rgba(252, 163, 17, 0.3);
        }
        .flow-step h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .flow-step p {
            font-size: 14px;
            color: var(--text-muted);
            max-width: 260px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .flow-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 24px;
        }
        @media (max-width: 768px) {
            .stat-card .stat-number {
                font-size: 32px;
            }
            .flow-arrow {
                transform: rotate(90deg);
                margin: 8px 0;
            }
        }

        /* ===== News Cards ===== */
        .news-card {
            display: block;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            height: 100%;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: rgba(252, 163, 17, 0.4);
        }
        .news-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 12px;
            flex-wrap: wrap;
            gap: 8px;
        }
        .badge-soft {
            background: var(--accent-light);
            color: var(--accent-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
        }
        .news-date {
            font-size: 13px;
            color: var(--text-muted);
        }
        .news-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-dark);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .news-card-more i {
            transition: transform 0.3s ease;
        }
        .news-card:hover .news-card-more i {
            transform: translateX(4px);
        }
        .empty-state {
            background: var(--bg-white);
            border: 1px dashed var(--border);
            border-radius: var(--radius);
            padding: 48px 24px;
            text-align: center;
            color: var(--text-muted);
            font-size: 16px;
        }
        @media (max-width: 768px) {
            .news-card {
                padding: 20px;
            }
        }

        /* ===== Feature / Showcase ===== */
        .feature-section .feature-image {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            object-fit: cover;
        }
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 24px 0 0;
        }
        .feature-list li {
            font-size: 15px;
            color: var(--text-main);
            padding: 8px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            border-bottom: 1px solid var(--border);
        }
        .feature-list li:last-child {
            border-bottom: none;
        }
        .feature-list i {
            color: var(--accent);
            font-size: 18px;
        }
        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 50px;
            padding: 12px 34px;
            font-weight: 600;
            font-size: 15px;
            box-shadow: 0 4px 18px rgba(22, 36, 71, 0.25);
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(22, 36, 71, 0.3);
        }
        .btn-primary-custom:focus {
            outline: none;
            box-shadow: 0 0 0 4px rgba(22, 36, 71, 0.2);
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-white);
        }
        .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            background: #fff;
            padding: 20px 24px;
            border: none;
            box-shadow: none;
        }
        .accordion-button:not(.collapsed) {
            background: var(--accent-light);
            color: var(--accent-dark);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(252, 163, 17, 0.15);
            border: none;
        }
        .accordion-body {
            padding: 0 24px 22px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
        }
        .accordion-button::after {
            background-size: 16px;
            opacity: 0.6;
            margin-left: auto;
        }

        /* ===== CTA ===== */
        .cta-section {
            background:
                linear-gradient(135deg, rgba(13, 25, 46, 0.92), rgba(22, 36, 71, 0.82)),
                url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 90px 0;
            color: #fff;
            text-align: center;
        }
        .cta-section .section-title {
            color: #fff;
            font-size: 36px;
        }
        .cta-section .section-desc {
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto;
        }
        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
            margin-top: 30px;
        }
        @media (max-width: 768px) {
            .cta-section .section-title {
                font-size: 26px;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .cta-buttons .btn {
                width: 100%;
                max-width: 280px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 70px 0 0;
        }
        .site-footer .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }
        .site-footer .footer-brand span {
            background: linear-gradient(135deg, #fff, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }
        .site-footer .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 10px;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            transition: var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 22px 0;
            margin-top: 50px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .site-footer {
                padding-top: 50px;
            }
            .site-footer .footer-bottom {
                margin-top: 30px;
            }
        }

        /* ===== BackTop ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            border: none;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 20px rgba(252, 163, 17, 0.35);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: var(--transition);
            cursor: pointer;
        }
        .back-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
        }
        @media (max-width: 520px) {
            .back-top {
                bottom: 18px;
                right: 18px;
                width: 38px;
                height: 38px;
                font-size: 14px;
            }
        }

/* roulang page: category1 */
/* ============ 设计变量 ============ */
        :root {
            --clr-primary: #4f46e5;
            --clr-primary-600: #4338ca;
            --clr-primary-soft: #eef2ff;
            --clr-accent: #f59e0b;
            --clr-accent-hover: #d97706;
            --clr-dark: #0b1120;
            --clr-dark-2: #111a2e;
            --clr-dark-3: #1b2545;
            --clr-bg: #f8fafc;
            --clr-card: #ffffff;
            --clr-text: #0f172a;
            --clr-text-light: #64748b;
            --clr-text-white: #f1f5f9;
            --clr-border: #e2e8f0;
            --radius-lg: 22px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
            --shadow-md: 0 12px 32px rgba(15, 23, 42, .1);
            --shadow-lg: 0 28px 64px rgba(15, 23, 42, .16);
            --transition: .25s ease;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--clr-text);
            background: var(--clr-bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a:hover {
            color: var(--clr-primary-600);
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
        }

        /* ============ 容器 ============ */
        .container {
            max-width: 1200px;
            margin-inline: auto;
        }

        /* ============ Header / 导航 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(11, 17, 32, .92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, .06);
            box-shadow: 0 4px 24px rgba(2, 6, 17, .28);
        }

        .custom-navbar {
            padding: .75rem 0;
            min-height: 72px;
        }

        .custom-navbar .container {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: .5rem;
        }

        .navbar-brand.brand-center {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            color: #fff;
            font-size: 1.45rem;
            font-weight: 800;
            letter-spacing: .04em;
            white-space: nowrap;
            background: linear-gradient(120deg, #f8fafc, #c7d2fe);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            transition: opacity var(--transition);
        }

        .navbar-brand.brand-center:hover {
            opacity: .85;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: .25rem;
            position: relative;
            z-index: 2;
        }

        .nav-left {
            margin-right: auto;
        }

        .nav-right {
            margin-left: auto;
        }

        .nav-link-custom {
            display: inline-block;
            padding: .5rem .9rem;
            border-radius: var(--radius-sm);
            color: rgba(241, 245, 249, .78);
            font-size: .95rem;
            font-weight: 500;
            transition: background var(--transition), color var(--transition);
        }

        .nav-link-custom:hover {
            color: #fff;
            background: rgba(255, 255, 255, .08);
        }

        .nav-link-custom.active {
            color: #fff;
            background: rgba(79, 70, 229, .45);
            box-shadow: inset 0 0 0 1px rgba(129, 140, 248, .4);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, .18);
            border-radius: 10px;
            padding: .4rem .6rem;
            background: rgba(255, 255, 255, .06);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(99, 102, 241, .35);
            outline: none;
        }

        .navbar-toggler-icon {
            width: 1.4em;
            height: 1.4em;
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(241,245,249,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .mobile-menu {
            padding: 1.2rem 1rem 1.5rem;
            background: var(--clr-dark-2);
            border-radius: 0 0 18px 18px;
            margin-top: .75rem;
            border-top: 1px solid rgba(255, 255, 255, .06);
        }

        .mobile-menu-title {
            color: rgba(241, 245, 249, .5);
            font-size: .82rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: .08em;
            margin-bottom: .8rem;
        }

        .mobile-nav-link {
            display: block;
            padding: .7rem .8rem;
            border-radius: 10px;
            color: rgba(241, 245, 249, .8);
            font-weight: 500;
            margin-bottom: .2rem;
            transition: background var(--transition), color var(--transition);
        }

        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            color: #fff;
            background: rgba(79, 70, 229, .35);
        }

        /* Button */
        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: .45rem;
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
            color: #0b1120;
            font-weight: 700;
            border: none;
            border-radius: 12px;
            padding: .55rem 1.3rem;
            box-shadow: 0 6px 20px rgba(245, 158, 11, .3);
            transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
        }

        .btn-accent:hover {
            color: #0b1120;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(245, 158, 11, .4);
            filter: brightness(1.03);
        }

        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 4px 14px rgba(245, 158, 11, .3);
        }

        .btn-accent:focus-visible {
            outline: 3px solid rgba(245, 158, 11, .5);
            outline-offset: 2px;
        }

        .btn-outline-light-custom {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            border: 1px solid rgba(255, 255, 255, .35);
            color: #fff;
            background: transparent;
            border-radius: 12px;
            padding: .5rem 1.2rem;
            font-weight: 600;
            transition: background var(--transition), border var(--transition);
        }

        .btn-outline-light-custom:hover {
            background: rgba(255, 255, 255, .1);
            border-color: rgba(255, 255, 255, .6);
            color: #fff;
        }

        /* ============ Hero ============ */
        .category-hero {
            position: relative;
            padding: 100px 0 90px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 17, 32, .94) 0%, rgba(17, 26, 46, .88) 50%, rgba(11, 17, 32, .72) 100%);
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb-wrap {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: .4rem;
            font-size: .9rem;
            color: rgba(241, 245, 249, .6);
            margin-bottom: 1.5rem;
        }

        .breadcrumb-wrap a {
            color: rgba(241, 245, 249, .75);
            transition: color var(--transition);
        }

        .breadcrumb-wrap a:hover {
            color: #fff;
        }

        .breadcrumb-wrap .sep {
            opacity: .5;
        }

        .category-hero h1 {
            color: #fff;
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 800;
            letter-spacing: .02em;
            line-height: 1.2;
            margin-bottom: .8rem;
            text-shadow: 0 4px 24px rgba(2, 6, 17, .4);
        }

        .category-hero .lead {
            color: rgba(241, 245, 249, .8);
            font-size: clamp(1rem, 1.6vw, 1.2rem);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 1.5rem;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .18);
            border-radius: 40px;
            color: #fff;
            font-size: .82rem;
            font-weight: 600;
            padding: .35rem 1rem;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(6px);
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 2rem;
            color: rgba(241, 245, 249, .65);
            font-size: .9rem;
        }

        /* ============ 通用 Section ============ */
        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: var(--clr-card);
            border-top: 1px solid var(--clr-border);
            border-bottom: 1px solid var(--clr-border);
        }

        .section-head {
            margin-bottom: 3rem;
        }

        .section-head .subtitle {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            font-size: .88rem;
            font-weight: 700;
            color: var(--clr-primary);
            letter-spacing: .06em;
            text-transform: uppercase;
            margin-bottom: .6rem;
        }

        .section-head h2 {
            font-size: clamp(1.7rem, 3vw, 2.4rem);
            font-weight: 800;
            color: var(--clr-text);
            line-height: 1.3;
            margin-bottom: .75rem;
        }

        .section-head p {
            color: var(--clr-text-light);
            max-width: 640px;
            line-height: 1.75;
        }

        /* ============ 指南分类卡片 ============ */
        .guide-card {
            display: block;
            background: var(--clr-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            height: 100%;
        }

        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(79, 70, 229, .25);
        }

        .guide-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }

        .guide-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .45s ease;
        }

        .guide-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }

        .guide-card .card-img-wrap::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(11, 17, 32, .18));
        }

        .guide-card .card-tag {
            position: absolute;
            left: 16px;
            top: 16px;
            z-index: 2;
            background: rgba(11, 17, 32, .7);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: .78rem;
            font-weight: 600;
            padding: .3rem .8rem;
            border-radius: 40px;
        }

        .guide-card .card-body {
            padding: 1.6rem 1.5rem 1.8rem;
        }

        .guide-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: .5rem;
        }

        .guide-card p {
            font-size: .9rem;
            color: var(--clr-text-light);
            line-height: 1.7;
            margin-bottom: 1rem;
        }

        .guide-card .card-link {
            font-size: .9rem;
            font-weight: 600;
            color: var(--clr-primary);
            display: inline-flex;
            align-items: center;
            gap: .35rem;
        }

        .guide-card .card-link i {
            transition: transform var(--transition);
        }

        .guide-card:hover .card-link i {
            transform: translateX(4px);
        }

        /* ============ 图文区块 ============ */
        .feature-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }

        .feature-img-wrap img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .feature-img-wrap::before {
            content: "";
            position: absolute;
            inset: 0;
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: inherit;
            pointer-events: none;
        }

        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0 0 1.8rem;
        }

        .feature-list li {
            display: flex;
            gap: .8rem;
            align-items: flex-start;
            padding: .55rem 0;
            font-size: .98rem;
            color: var(--clr-text);
        }

        .feature-list li i {
            color: var(--clr-primary);
            margin-top: .3rem;
            font-size: .95rem;
            width: 20px;
            flex-shrink: 0;
        }

        .feature-list li span {
            color: var(--clr-text-light);
        }

        /* ============ 文章列表 ============ */
        .post-card {
            display: flex;
            gap: 1.2rem;
            padding: 1.4rem;
            background: var(--clr-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            margin-bottom: 1.2rem;
            transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
        }

        .post-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: rgba(79, 70, 229, .2);
        }

        .post-card .post-thumb {
            width: 200px;
            min-width: 200px;
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .post-card .post-thumb img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            transition: transform .4s ease;
        }

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

        .post-card .post-content {
            flex: 1;
        }

        .post-card .post-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: .8rem;
            font-size: .82rem;
            color: var(--clr-text-light);
            margin-bottom: .4rem;
        }

        .post-card .post-meta .badge-soft {
            background: var(--clr-primary-soft);
            color: var(--clr-primary);
            font-weight: 600;
            padding: .25rem .7rem;
            border-radius: 40px;
            font-size: .78rem;
        }

        .post-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: .35rem;
        }

        .post-card h3 a {
            color: var(--clr-text);
        }

        .post-card h3 a:hover {
            color: var(--clr-primary);
        }

        .post-card .post-excerpt {
            font-size: .9rem;
            color: var(--clr-text-light);
            line-height: 1.7;
            margin-bottom: .6rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* 侧栏 */
        .sidebar-card {
            background: var(--clr-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            padding: 1.8rem 1.6rem;
            box-shadow: var(--shadow-sm);
            margin-bottom: 1.5rem;
        }

        .sidebar-card .sidebar-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: 1rem;
            padding-bottom: .75rem;
            border-bottom: 1px solid var(--clr-border);
            display: flex;
            align-items: center;
            gap: .5rem;
        }

        .sidebar-card .sidebar-title i {
            color: var(--clr-primary);
        }

        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-nav li {
            margin-bottom: .3rem;
        }

        .sidebar-nav a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: .5rem .7rem;
            border-radius: var(--radius-sm);
            color: var(--clr-text);
            font-size: .9rem;
            font-weight: 500;
            transition: background var(--transition), color var(--transition);
        }

        .sidebar-nav a:hover {
            background: var(--clr-primary-soft);
            color: var(--clr-primary);
        }

        .sidebar-nav a.active {
            background: var(--clr-primary-soft);
            color: var(--clr-primary);
            font-weight: 600;
        }

        .sidebar-nav a i {
            font-size: .7rem;
            opacity: .5;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: .55rem;
        }

        .tag-item {
            display: inline-block;
            padding: .3rem .8rem;
            background: var(--clr-bg);
            border: 1px solid var(--clr-border);
            border-radius: 40px;
            font-size: .8rem;
            font-weight: 500;
            color: var(--clr-text-light);
            transition: background var(--transition), color var(--transition), border var(--transition);
        }

        .tag-item:hover {
            background: var(--clr-primary-soft);
            border-color: rgba(79, 70, 229, .25);
            color: var(--clr-primary);
        }

        .contact-mini {
            background: linear-gradient(135deg, var(--clr-dark), var(--clr-dark-2));
            border-radius: var(--radius-lg);
            padding: 1.8rem 1.5rem;
            color: #fff;
            text-align: center;
        }

        .contact-mini h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: .5rem;
        }

        .contact-mini p {
            font-size: .85rem;
            opacity: .7;
            margin-bottom: 1rem;
        }

        .contact-mini .btn-accent {
            width: 100%;
            justify-content: center;
        }

        /* ============ 使用步骤 ============ */
        .section-steps {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            background-attachment: fixed;
            padding: 90px 0;
        }

        .section-steps::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(11, 17, 32, .92);
        }

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

        .section-steps .section-head h2 {
            color: #fff;
        }

        .section-steps .section-head p {
            color: rgba(241, 245, 249, .7);
        }

        .step-card {
            text-align: center;
            padding: 2rem 1.5rem;
            background: rgba(255, 255, 255, .04);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius-lg);
            height: 100%;
            backdrop-filter: blur(8px);
            transition: background var(--transition), transform var(--transition), border var(--transition);
        }

        .step-card:hover {
            background: rgba(255, 255, 255, .07);
            transform: translateY(-5px);
            border-color: rgba(255, 255, 255, .22);
        }

        .step-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 1.1rem;
            border-radius: 18px;
            background: linear-gradient(135deg, var(--clr-primary), #818cf8);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: #fff;
            box-shadow: 0 10px 24px rgba(79, 70, 229, .35);
        }

        .step-num {
            display: inline-block;
            font-size: .78rem;
            font-weight: 700;
            color: var(--clr-accent);
            letter-spacing: .08em;
            margin-bottom: .4rem;
        }

        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: .5rem;
        }

        .step-card p {
            font-size: .88rem;
            color: rgba(241, 245, 249, .65);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ============ FAQ ============ */
        .faq-accordion .accordion-item {
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md) !important;
            margin-bottom: .9rem;
            overflow: hidden;
            background: var(--clr-card);
            box-shadow: var(--shadow-sm);
        }

        .faq-accordion .accordion-button {
            font-weight: 600;
            color: var(--clr-text);
            background: var(--clr-card);
            padding: 1.2rem 1.4rem;
            font-size: .98rem;
            box-shadow: none;
            border: none;
            transition: color var(--transition), background var(--transition);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--clr-primary);
            background: var(--clr-primary-soft);
            box-shadow: none;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(79, 70, 229, .25);
            outline: none;
        }

        .faq-accordion .accordion-button::after {
            background-size: 1rem;
            transition: transform var(--transition);
        }

        .faq-accordion .accordion-body {
            padding: 1.2rem 1.4rem;
            color: var(--clr-text-light);
            font-size: .92rem;
            line-height: 1.75;
            border-top: 1px solid var(--clr-border);
        }

        /* ============ CTA ============ */
        .section-cta {
            padding: 80px 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            position: relative;
        }

        .section-cta::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(79, 70, 229, .92), rgba(11, 17, 32, .94));
        }

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

        .section-cta h2 {
            color: #fff;
            font-size: clamp(1.8rem, 3.4vw, 2.7rem);
            font-weight: 800;
            margin-bottom: .8rem;
        }

        .section-cta p {
            color: rgba(241, 245, 249, .8);
            max-width: 560px;
            margin: 0 auto 2rem;
            font-size: 1.05rem;
        }

        .cta-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--clr-dark);
            color: rgba(241, 245, 249, .7);
            padding: 68px 0 0;
            border-top: 4px solid var(--clr-primary);
        }

        .site-footer .footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: .02em;
            margin-bottom: .8rem;
        }

        .site-footer .footer-brand span {
            color: var(--clr-accent);
        }

        .site-footer .footer-desc {
            font-size: .9rem;
            line-height: 1.8;
            color: rgba(241, 245, 249, .55);
            margin-bottom: 0;
            max-width: 340px;
        }

        .site-footer .footer-title {
            font-size: .95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1.1rem;
            letter-spacing: .03em;
        }

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

        .site-footer .footer-links li {
            margin-bottom: .55rem;
            font-size: .9rem;
        }

        .site-footer .footer-links a {
            color: rgba(241, 245, 249, .6);
            transition: color var(--transition), padding-left var(--transition);
        }

        .site-footer .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .site-footer .footer-links span {
            color: rgba(241, 245, 249, .5);
            font-size: .88rem;
        }

        .site-footer .footer-bottom {
            margin-top: 3rem;
            padding: 1.4rem 0;
            border-top: 1px solid rgba(255, 255, 255, .06);
            text-align: center;
            font-size: .85rem;
            color: rgba(241, 245, 249, .4);
        }

        .site-footer .footer-bottom p {
            margin: 0;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 991.98px) {
            .navbar-brand.brand-center {
                position: static;
                transform: none;
                margin-right: auto;
            }

            .custom-navbar .container {
                flex-wrap: wrap;
            }

            .nav-left,
            .nav-right {
                display: none !important;
            }

            .navbar-toggler {
                display: block;
            }

            .category-hero {
                padding: 70px 0 60px;
            }

            .section {
                padding: 64px 0;
            }

            .section-steps {
                background-attachment: scroll;
                padding: 64px 0;
            }

            .section-cta {
                padding: 60px 0;
            }
        }

        @media (max-width: 767.98px) {
            .post-card {
                flex-direction: column;
            }

            .post-card .post-thumb {
                width: 100%;
                min-width: 0;
            }

            .post-card .post-thumb img {
                height: 180px;
            }

            .site-footer {
                padding-top: 48px;
            }

            .guide-card .card-body {
                padding: 1.2rem;
            }
        }

        @media (max-width: 575.98px) {
            body {
                font-size: 15px;
            }

            .category-hero h1 {
                font-size: 1.8rem;
            }

            .category-hero .lead {
                font-size: .95rem;
            }

            .hero-meta {
                gap: .8rem;
                font-size: .82rem;
            }

            .section {
                padding: 48px 0;
            }

            .section-head h2 {
                font-size: 1.5rem;
            }

            .step-card {
                padding: 1.5rem 1rem;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .cta-buttons .btn-accent,
            .cta-buttons .btn-outline-light-custom {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 360px) {
            .navbar-brand.brand-center {
                font-size: 1.2rem;
            }

            .guide-card .card-body {
                padding: 1rem;
            }

            .post-card {
                padding: 1rem;
            }
        }

/* roulang page: article */
:root {
    --primary: #4F46E5;
    --primary-light: #EEF2FF;
    --primary-dark: #3730A3;
    --accent: #F59E0B;
    --accent-light: #FEF3C7;
    --dark: #0F172A;
    --dark-2: #1E293B;
    --body-bg: #F8FAFC;
    --white: #FFFFFF;
    --text-main: #1E293B;
    --text-muted: #64748B;
    --border: #E2E8F0;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 8px;
    --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 6px 24px rgba(15, 23, 42, 0.10);
    --shadow-lg: 0 14px 44px rgba(15, 23, 42, 0.14);
    --transition: all 0.3s ease;
    --font-main: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background: var(--body-bg);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

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

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

button,
input {
    font-family: inherit;
}

ul,
ol {
    list-style: none;
}

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

/* ===== Header / Navbar ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 18px rgba(15, 23, 42, 0.06);
}

.custom-navbar {
    padding: 0.75rem 0;
    min-height: 72px;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dark-2);
    letter-spacing: 0.5px;
    padding: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    transition: var(--transition);
}

.navbar-brand:hover {
    opacity: 0.85;
    color: var(--dark-2);
}

.nav-left,
.nav-right {
    flex: 1;
}

.nav-right {
    justify-content: flex-end;
}

.nav-link-custom {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-main);
    padding: 0.55rem 1.1rem;
    border-radius: 50px;
    transition: var(--transition);
    position: relative;
}

.nav-link-custom:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.nav-link-custom.active {
    color: var(--primary);
    background: var(--primary-light);
    font-weight: 600;
}

.navbar-toggler {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.4rem 0.65rem;
    outline: none;
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%234F46E5' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.mobile-menu {
    padding: 1rem 0 0.75rem;
    border-top: 1px solid var(--border);
    margin-top: 0.75rem;
}

.mobile-menu-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.mobile-nav-link {
    display: block;
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-main);
    transition: var(--transition);
}

.mobile-nav-link:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.mobile-nav-link.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

/* ===== Buttons ===== */
.btn {
    border-radius: 50px;
    font-weight: 600;
    padding: 0.6rem 1.5rem;
    transition: var(--transition);
    border: none;
    letter-spacing: 0.3px;
}

.btn:focus,
.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.25);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.35);
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent) 0%, #F97316 100%);
    color: #fff;
    border-radius: 50px;
    padding: 0.6rem 1.4rem;
    font-weight: 600;
    transition: var(--transition);
}

.btn-accent:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

.btn-sm {
    padding: 0.45rem 1.1rem;
    font-size: 0.88rem;
}

.btn-lg {
    padding: 0.8rem 2.2rem;
    font-size: 1.05rem;
}

/* ===== Article Hero ===== */
.article-hero {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(79, 70, 229, 0.78) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    padding: 4.5rem 0 3.8rem;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.article-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 480px;
    height: 480px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 50%;
    pointer-events: none;
}

.breadcrumb-nav {
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.breadcrumb-nav .breadcrumb {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 50px;
    padding: 0.45rem 1.1rem;
    display: inline-flex;
    backdrop-filter: blur(8px);
    margin-bottom: 0;
}

.breadcrumb-nav .breadcrumb-item {
    font-size: 0.85rem;
}

.breadcrumb-nav .breadcrumb-item + .breadcrumb-item::before {
    color: rgba(255, 255, 255, 0.5);
}

.breadcrumb-nav .breadcrumb-item a {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb-nav .breadcrumb-item a:hover {
    color: #fff;
}

.breadcrumb-nav .breadcrumb-item.active {
    color: #fff;
    font-weight: 500;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #fff;
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.35rem 1.1rem;
    border-radius: 50px;
    backdrop-filter: blur(8px);
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
}

.article-hero h1 {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 1rem;
    max-width: 860px;
    color: #fff;
}

.article-hero .hero-desc {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 720px;
    margin-bottom: 1.5rem;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem;
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.75);
}

.hero-meta span {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.hero-meta i {
    color: var(--accent);
}

/* ===== Main Layout ===== */
.article-main {
    padding: 3.5rem 0 4rem;
}

.article-main-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

.article-lead {
    font-size: 1.12rem;
    line-height: 1.8;
    color: var(--text-muted);
    background: var(--primary-light);
    border-radius: var(--radius-md);
    padding: 1.2rem 1.5rem;
    margin-bottom: 2rem;
    border-left: 4px solid var(--primary);
}

.article-content {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text-main);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.article-content p {
    margin-bottom: 1.4rem;
}

.article-content h2,
.article-content h3,
.article-content h4 {
    font-weight: 700;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--dark-2);
    line-height: 1.4;
}

.article-content h2 {
    font-size: 1.45rem;
    padding-bottom: 0.6rem;
    border-bottom: 2px solid var(--border);
}

.article-content h3 {
    font-size: 1.25rem;
}

.article-content h4 {
    font-size: 1.1rem;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
    box-shadow: var(--shadow-sm);
}

.article-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    font-weight: 500;
}

.article-content a:hover {
    color: var(--primary-dark);
    text-decoration-thickness: 2px;
}

.article-content ul,
.article-content ol {
    margin-bottom: 1.4rem;
    padding-left: 1.6rem;
}

.article-content ul {
    list-style: disc;
}

.article-content ol {
    list-style: decimal;
}

.article-content li {
    margin-bottom: 0.55rem;
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-light);
    padding: 1.2rem 1.4rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 1.6rem 0;
    color: var(--dark-2);
    font-style: italic;
}

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

.article-content table th,
.article-content table td {
    border: 1px solid var(--border);
    padding: 0.75rem 1rem;
    text-align: left;
}

.article-content table th {
    background: var(--body-bg);
    font-weight: 600;
}

.article-content code {
    background: #F1F5F9;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.92em;
    color: var(--primary-dark);
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.tag-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-right: 0.25rem;
}

.badge-tag {
    background: var(--body-bg);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 0.3rem 0.9rem;
    font-size: 0.82rem;
    color: var(--text-main);
    transition: var(--transition);
}

.badge-tag:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary);
}

.article-back {
    margin-top: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.8rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}

/* ===== Not Found ===== */
.not-found-box {
    text-align: center;
    padding: 3rem 1.5rem;
}

.not-found-box i {
    font-size: 3.5rem;
    color: var(--primary);
    margin-bottom: 1.2rem;
    display: inline-block;
}

.not-found-box h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-2);
    margin-bottom: 0.75rem;
}

.not-found-box p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* ===== Sidebar ===== */
.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.side-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 1.6rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.side-card:hover {
    box-shadow: var(--shadow-md);
}

.side-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dark-2);
    margin-bottom: 1.2rem;
    padding-bottom: 0.7rem;
    border-bottom: 2px solid var(--primary-light);
    position: relative;
}

.side-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

.side-list li {
    margin-bottom: 0.3rem;
}

.side-list a {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    color: var(--text-main);
    transition: var(--transition);
}

.side-list a i {
    font-size: 0.75rem;
    color: var(--primary);
    transition: var(--transition);
}

.side-list a:hover {
    background: var(--primary-light);
    color: var(--primary);
    padding-left: 1rem;
}

.side-list a:hover i {
    transform: translateX(3px);
}

.side-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.side-tags a {
    font-size: 0.82rem;
    color: var(--text-main);
    background: var(--body-bg);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 0.3rem 0.9rem;
    transition: var(--transition);
}

.side-tags a:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-2px);
}

.side-promo {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    border: none;
    text-align: center;
    padding: 2rem 1.5rem;
    position: relative;
    overflow: hidden;
}

.side-promo::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -30%;
    width: 160px;
    height: 160px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.side-promo h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    color: #fff;
}

.side-promo p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1.2rem;
}

/* ===== Related Section ===== */
.related-section {
    padding: 4rem 0;
    background: var(--white);
    border-top: 1px solid var(--border);
}

.section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-header h2 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--dark-2);
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.related-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    height: 100%;
}

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

.related-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.related-card-body {
    padding: 1.4rem;
}

.related-card-body .badge-category {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 600;
    border-radius: 50px;
    padding: 0.25rem 0.85rem;
    margin-bottom: 0.75rem;
}

.related-card-body h3 {
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--dark-2);
    margin-bottom: 0.5rem;
}

.related-card-body p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-link {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--transition);
}

.card-link i {
    transition: var(--transition);
}

.card-link:hover {
    color: var(--primary-dark);
}

.card-link:hover i {
    transform: translateX(4px);
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(79, 70, 229, 0.85) 100%), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
    padding: 5rem 0;
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    bottom: -60%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: #fff;
    position: relative;
    z-index: 1;
}

.cta-section p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 620px;
    margin: 0 auto 2rem;
    position: relative;
    z-index: 1;
}

.cta-section .btn {
    position: relative;
    z-index: 1;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.75);
    padding: 4rem 0 1.5rem;
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 1rem;
}

.footer-brand span {
    color: var(--accent);
}

.footer-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0;
}

.footer-title {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.65);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-links span {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 0;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .article-hero h1 {
        font-size: 1.9rem;
    }

    .article-main-card {
        padding: 1.8rem;
    }
}

@media (max-width: 768px) {
    .article-hero {
        padding: 3rem 0 2.5rem;
    }

    .article-hero h1 {
        font-size: 1.6rem;
    }

    .hero-desc {
        font-size: 0.98rem;
    }

    .article-main {
        padding: 2.5rem 0 3rem;
    }

    .article-main-card {
        padding: 1.4rem;
        border-radius: var(--radius-md);
    }

    .article-lead {
        font-size: 1rem;
        padding: 1rem 1.2rem;
    }

    .article-content {
        font-size: 1rem;
        line-height: 1.85;
    }

    .article-content h2 {
        font-size: 1.25rem;
    }

    .article-sidebar {
        margin-top: 1.5rem;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

    .cta-section {
        padding: 3.5rem 0;
    }

    .cta-section h2 {
        font-size: 1.6rem;
    }

    .site-footer {
        padding: 3rem 0 1.25rem;
    }
}

@media (max-width: 520px) {
    .article-hero h1 {
        font-size: 1.4rem;
    }

    .hero-meta {
        gap: 0.8rem;
        font-size: 0.82rem;
    }

    .article-main-card {
        padding: 1.1rem;
    }

    .article-tags {
        gap: 0.4rem;
    }

    .badge-tag {
        font-size: 0.78rem;
        padding: 0.25rem 0.7rem;
    }

    .related-card img {
        height: 160px;
    }

    .cta-section h2 {
        font-size: 1.35rem;
    }

    .cta-section p {
        font-size: 0.95rem;
    }

    .footer-brand {
        font-size: 1.3rem;
    }
}

/* roulang page: category3 */
:root {
            --primary: #4f46e5;
            --primary-light: #818cf8;
            --primary-dark: #3730a3;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-2: #1e293b;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border-light: #e2e8f0;
            --border-dark: #334155;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 8px rgba(30, 41, 59, 0.06);
            --shadow-md: 0 8px 24px rgba(30, 41, 59, 0.08);
            --shadow-lg: 0 16px 48px rgba(30, 41, 59, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-width: 1200px;
            --header-height: 72px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }
        input,
        textarea {
            font-family: inherit;
        }
        .container {
            max-width: var(--container-width);
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .custom-navbar {
            padding: 0;
            width: 100%;
        }
        .custom-navbar .container {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            z-index: 2;
        }
        .brand-center {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            z-index: 3;
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--text-main);
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
            transition: var(--transition);
            padding: 6px 20px;
            border-radius: 40px;
            background-color: rgba(255, 255, 255, 0.8);
            box-shadow: 0 2px 16px rgba(79, 70, 229, 0.12);
        }
        .brand-center:hover {
            transform: translateX(-50%) translateY(-2px);
            box-shadow: 0 6px 24px rgba(79, 70, 229, 0.2);
        }
        .nav-link-custom {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 8px 16px;
            border-radius: 40px;
            transition: var(--transition);
        }
        .nav-link-custom:hover {
            color: var(--primary);
            background: rgba(79, 70, 229, 0.06);
        }
        .nav-link-custom.active {
            color: var(--primary);
            background: rgba(79, 70, 229, 0.1);
            font-weight: 600;
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            color: #fff;
            font-weight: 600;
            border-radius: 40px;
            padding: 10px 24px;
            font-size: 0.9rem;
            border: none;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
        }
        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4);
            color: #fff;
        }
        .btn-primary-custom {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            font-weight: 600;
            border-radius: 40px;
            padding: 12px 28px;
            font-size: 0.95rem;
            border: none;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
            color: #fff;
        }
        .btn-outline-custom {
            background: transparent;
            border: 2px solid var(--border-light);
            color: var(--text-main);
            font-weight: 500;
            border-radius: 40px;
            padding: 10px 24px;
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-outline-custom:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(79, 70, 229, 0.04);
            transform: translateY(-2px);
        }
        .navbar-toggler {
            border: 2px solid var(--border-light);
            padding: 6px 10px;
            border-radius: 10px;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(30,41,59,0.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        .mobile-menu {
            padding: 20px 0 28px;
            background: #fff;
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            box-shadow: var(--shadow-md);
        }
        .mobile-menu-title {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
            font-weight: 600;
            padding: 0 8px;
        }
        .mobile-nav-link {
            display: block;
            padding: 12px 16px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-main);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            background: rgba(79, 70, 229, 0.06);
            color: var(--primary);
        }

        .page-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1e1b4b 60%, #312e81 100%);
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: 50%;
            transform: translateX(-50%);
            width: 800px;
            height: 200px;
            background: radial-gradient(ellipse, rgba(129, 140, 248, 0.25) 0%, transparent 70%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--accent-light);
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            backdrop-filter: blur(8px);
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 2px;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .page-banner .banner-desc {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.05rem;
            max-width: 640px;
            margin-bottom: 28px;
            line-height: 1.8;
        }
        .banner-stats {
            display: flex;
            gap: 36px;
            flex-wrap: wrap;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }
        .banner-stat {
            display: flex;
            flex-direction: column;
        }
        .banner-stat .num {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
        }
        .banner-stat .label {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.65);
            letter-spacing: 1px;
        }

        .section-block {
            padding: 70px 0;
        }
        .section-head {
            margin-bottom: 44px;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(79, 70, 229, 0.08);
            padding: 6px 16px;
            border-radius: 40px;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 560px;
            line-height: 1.7;
        }

        .features-section {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-light);
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 54px;
            height: 54px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.12), rgba(129, 140, 248, 0.12));
            color: var(--primary);
        }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }

        .strategy-grid-section {
            background: var(--bg-body);
        }
        .strategy-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
        }
        .strategy-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        .strategy-card-img {
            position: relative;
            height: 190px;
            overflow: hidden;
        }
        .strategy-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .strategy-card:hover .strategy-card-img img {
            transform: scale(1.06);
        }
        .strategy-card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(15, 23, 42, 0.8);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .strategy-card-body {
            padding: 22px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .strategy-card-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.5;
            transition: var(--transition);
        }
        .strategy-card:hover .strategy-card-body h3 {
            color: var(--primary);
        }
        .strategy-card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .strategy-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .strategy-card-meta .tag-list {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .strategy-card-meta .badge-light {
            background: var(--bg-body);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: 20px;
        }

        .ranking-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1e1b4b 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .ranking-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(129, 140, 248, 0.15) 0%, transparent 70%);
        }
        .ranking-section .section-title,
        .ranking-section .section-subtitle {
            color: #fff;
        }
        .ranking-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .ranking-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            display: flex;
            align-items: center;
            gap: 18px;
            transition: var(--transition);
            backdrop-filter: blur(8px);
        }
        .ranking-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateX(6px);
        }
        .ranking-num {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
            background: rgba(255, 255, 255, 0.1);
            color: var(--accent-light);
            flex-shrink: 0;
        }
        .ranking-item:nth-child(1) .ranking-num {
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
            color: #fff;
        }
        .ranking-info {
            flex: 1;
        }
        .ranking-info h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
            color: #fff;
        }
        .ranking-info p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin: 0;
        }
        .ranking-value {
            text-align: right;
            flex-shrink: 0;
        }
        .ranking-value .val {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--accent-light);
        }
        .ranking-value .unit {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }

        .flow-section {
            background: var(--bg-card);
        }
        .flow-step {
            text-align: center;
            padding: 30px 20px;
            position: relative;
        }
        .flow-step::after {
            content: '\f105';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--primary-light);
            font-size: 1.2rem;
        }
        .flow-step:last-child::after {
            display: none;
        }
        .flow-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.3);
        }
        .flow-step h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .flow-step p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        .faq-section {
            background: var(--bg-body);
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            margin-bottom: 14px;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--primary-light);
        }
        .faq-question {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .faq-question::before {
            content: '\f059';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--primary);
            font-size: 1.1rem;
        }
        .faq-answer {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.8;
            padding-left: 30px;
            margin-top: 12px;
        }

        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary) 60%, var(--primary-light));
            position: relative;
            overflow: hidden;
            padding: 70px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            left: -80px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -40px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 70%);
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-desc {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.05rem;
            margin-bottom: 32px;
            max-width: 520px;
        }
        .cta-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-cta-light {
            background: #fff;
            color: var(--primary-dark);
            font-weight: 600;
            border-radius: 40px;
            padding: 14px 32px;
            font-size: 1rem;
            border: none;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-cta-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }
        .btn-cta-ghost {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-weight: 500;
            border-radius: 40px;
            padding: 12px 28px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .btn-cta-ghost:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .cta-note {
            margin-top: 24px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
        }

        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 60px 0 0;
        }
        .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand span {
            color: var(--accent-light);
        }
        .footer-desc {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 300px;
        }
        .footer-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a,
        .footer-links span {
            font-size: 0.88rem;
            color: var(--text-light);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            margin-top: 40px;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 0.82rem;
            color: var(--text-light);
            margin: 0;
        }

        @media (max-width: 1024px) {
            :root {
                --header-height: 64px;
            }
            .page-banner {
                padding: 70px 0 50px;
            }
            .page-banner h1 {
                font-size: 2.3rem;
            }
            .section-block {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .flow-step::after {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .brand-center {
                font-size: 1.15rem;
                padding: 4px 14px;
            }
            .page-banner {
                padding: 56px 0 44px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
                letter-spacing: 1px;
            }
            .page-banner .banner-desc {
                font-size: 0.95rem;
            }
            .banner-stats {
                gap: 24px;
            }
            .section-block {
                padding: 44px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .cta-title {
                font-size: 1.7rem;
            }
            .ranking-value {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .brand-center {
                font-size: 1rem;
                padding: 4px 10px;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .banner-stats {
                gap: 16px;
            }
            .banner-stat .num {
                font-size: 1.3rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .flow-step {
                padding: 20px 8px;
            }
            .cta-buttons {
                flex-direction: column;
                width: 100%;
            }
            .btn-cta-light,
            .btn-cta-ghost {
                text-align: center;
                justify-content: center;
            }
        }

/* roulang page: category2 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #2b3a8f;
            --primary-dark: #1b2670;
            --primary-light: #5f6fc5;
            --accent: #ff9f2e;
            --accent-dark: #e6841a;
            --cyan: #19b8c7;
            --bg: #f4f6fb;
            --surface: #ffffff;
            --surface-dark: #141a33;
            --text: #1c2440;
            --text-weak: #6c7592;
            --border: #e6eaf3;
            --radius: 18px;
            --radius-sm: 12px;
            --shadow-sm: 0 4px 14px rgba(28, 36, 64, .06);
            --shadow-md: 0 12px 32px rgba(28, 36, 64, .10);
            --shadow-lg: 0 24px 56px rgba(28, 36, 64, .16);
            --space-section: 5.5rem;
            --font-base: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
        }

        /* ========== 基础重置 ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            margin: 0;
            font-family: var(--font-base);
            font-size: 1rem;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        button,
        input,
        textarea {
            font: inherit;
            color: inherit;
        }
        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 通用组件 ========== */
        .section-pad {
            padding: var(--space-section) 0;
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 3rem;
        }
        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 18px;
            border-radius: 999px;
            background: rgba(43, 58, 143, .08);
            color: var(--primary);
            font-size: .85rem;
            letter-spacing: 1px;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .section-head h2 {
            font-size: clamp(1.6rem, 3vw, 2.35rem);
            font-weight: 700;
            color: var(--text);
            margin: 0 0 12px;
            letter-spacing: -0.5px;
        }
        .section-head p {
            color: var(--text-weak);
            font-size: 1.02rem;
            margin: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 26px;
            border-radius: 999px;
            font-weight: 600;
            font-size: .95rem;
            line-height: 1.4;
            border: 2px solid transparent;
            transition: all .25s ease;
            cursor: pointer;
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent), #ffb85c);
            color: #1c2440;
            border-color: transparent;
            box-shadow: 0 8px 22px rgba(255, 159, 46, .32);
        }
        .btn-accent:hover {
            background: linear-gradient(135deg, var(--accent-dark), var(--accent));
            color: #1c2440;
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(255, 159, 46, .42);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, .12);
            color: #fff;
            border-color: rgba(255, 255, 255, .55);
            backdrop-filter: blur(4px);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, .22);
            color: #fff;
            border-color: #fff;
        }
        .btn-primary-solid {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 22px rgba(43, 58, 143, .28);
        }
        .btn-primary-solid:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn:focus-visible {
            outline: 3px solid rgba(43, 58, 143, .35);
            outline-offset: 3px;
        }

        .badge-tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(43, 58, 143, .07);
            color: var(--primary);
            font-size: .82rem;
            font-weight: 600;
            gap: 6px;
        }

        /* ========== 导航栏 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1080;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 24px rgba(28, 36, 64, .05);
        }
        .custom-navbar {
            padding: 14px 0;
            position: relative;
        }
        .brand-center {
            font-size: 1.42rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 1px;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            white-space: nowrap;
            background: linear-gradient(135deg, var(--primary) 20%, var(--primary-light) 60%, var(--cyan) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-left,
        .nav-right {
            z-index: 2;
        }
        .nav-link-custom {
            padding: 8px 18px;
            border-radius: 999px;
            font-weight: 500;
            font-size: .95rem;
            color: var(--text);
            background: transparent;
            border: 1px solid transparent;
            transition: all .25s ease;
        }
        .nav-link-custom:hover {
            background: rgba(43, 58, 143, .06);
            color: var(--primary);
        }
        .nav-link-custom.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 16px rgba(43, 58, 143, .25);
        }
        .btn-accent.btn-sm {
            padding: 8px 18px;
            font-size: .85rem;
        }
        .navbar-toggler {
            border: none;
            padding: 6px 10px;
            border-radius: 10px;
            background: rgba(43, 58, 143, .06);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(43, 58, 143, .2);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(43,58,143,1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2.4' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        .mobile-menu {
            padding: 18px 0 8px;
        }
        .mobile-menu-title {
            font-size: .8rem;
            letter-spacing: 1px;
            color: var(--text-weak);
            margin-bottom: 10px;
            font-weight: 600;
        }
        .mobile-nav-link {
            display: block;
            padding: 11px 14px;
            border-radius: 12px;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 4px;
            transition: all .2s ease;
        }
        .mobile-nav-link:hover {
            background: rgba(43, 58, 143, .06);
            color: var(--primary);
        }
        .mobile-nav-link.active {
            background: var(--primary);
            color: #fff;
        }

        /* ========== 页首横幅 ========== */
        .page-hero {
            position: relative;
            padding: 6.2rem 0 5.4rem;
            background-size: cover;
            background-position: center;
            background-color: var(--primary-dark);
            color: #fff;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(27, 38, 112, .88), rgba(43, 58, 143, .65), rgba(25, 184, 199, .28));
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero-content {
            max-width: 720px;
        }
        .badge-hero {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 18px;
            border-radius: 999px;
            background: rgba(255, 255, 255, .14);
            color: #fff;
            font-size: .84rem;
            letter-spacing: 1px;
            margin-bottom: 22px;
            border: 1px solid rgba(255, 255, 255, .25);
            backdrop-filter: blur(6px);
        }
        .page-hero h1 {
            font-size: clamp(2rem, 5vw, 3.4rem);
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.2;
            margin: 0 0 18px;
        }
        .page-hero h1 span {
            color: var(--accent);
        }
        .page-hero p.lead-text {
            font-size: 1.12rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 30px;
        }
        .hero-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
            font-size: .88rem;
            color: rgba(255, 255, 255, .75);
            margin-top: 26px;
        }
        .hero-breadcrumb a {
            color: rgba(255, 255, 255, .85);
        }
        .hero-breadcrumb a:hover {
            color: var(--accent);
        }
        .hero-breadcrumb i {
            font-size: .7rem;
            color: rgba(255, 255, 255, .5);
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* ========== 百科分类 ========== */
        .topic-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            height: 100%;
            box-shadow: var(--shadow-sm);
            transition: all .3s ease;
        }
        .topic-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(43, 58, 143, .25);
        }
        .topic-img {
            position: relative;
            height: 168px;
            overflow: hidden;
        }
        .topic-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .topic-card:hover .topic-img img {
            transform: scale(1.06);
        }
        .topic-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 45%, rgba(20, 26, 51, .55));
        }
        .topic-icon {
            position: absolute;
            left: 18px;
            bottom: 14px;
            z-index: 2;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(255, 255, 255, .92);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.15rem;
            box-shadow: 0 6px 16px rgba(20, 26, 51, .18);
        }
        .topic-body {
            padding: 22px 22px 24px;
        }
        .topic-body h3 {
            font-size: 1.18rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .topic-body p {
            color: var(--text-weak);
            font-size: .93rem;
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .topic-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: .84rem;
            color: var(--text-weak);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }
        .topic-link {
            font-weight: 600;
            color: var(--primary);
        }
        .topic-link:hover {
            color: var(--accent-dark);
        }

        /* ========== 热门百科词条 ========== */
        .entry-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
            transition: all .3s ease;
        }
        .entry-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }
        .entry-img {
            height: 168px;
            overflow: hidden;
            position: relative;
        }
        .entry-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .entry-card:hover .entry-img img {
            transform: scale(1.05);
        }
        .entry-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 5px 12px;
            background: rgba(255, 255, 255, .9);
            border-radius: 999px;
            font-size: .78rem;
            font-weight: 600;
            color: var(--primary);
            backdrop-filter: blur(4px);
            box-shadow: 0 4px 10px rgba(20, 26, 51, .1);
        }
        .entry-body {
            padding: 20px 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .entry-body h3 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.45;
        }
        .entry-body p {
            font-size: .92rem;
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .entry-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border);
            padding-top: 14px;
            font-size: .82rem;
            color: var(--text-weak);
        }
        .entry-footer .author {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ========== 数据与流程 ========== */
        .stats-section {
            position: relative;
            background: var(--surface-dark);
            color: #fff;
            overflow: hidden;
        }
        .stats-section::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(25, 184, 199, .35), transparent 70%);
        }
        .stats-section .section-head h2 {
            color: #fff;
        }
        .stats-section .section-head p {
            color: rgba(255, 255, 255, .65);
        }
        .stats-section .section-badge {
            background: rgba(255, 255, 255, .1);
            color: var(--accent);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
            margin-bottom: 3rem;
        }
        .stat-item {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius);
            padding: 30px 18px;
            text-align: center;
            transition: all .3s ease;
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, .1);
            transform: translateY(-4px);
        }
        .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            display: block;
            line-height: 1.3;
        }
        .stat-item .label {
            font-size: .88rem;
            color: rgba(255, 255, 255, .75);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }
        .process-item {
            position: relative;
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius);
            padding: 28px 20px;
            transition: all .3s ease;
        }
        .process-item:hover {
            background: rgba(255, 255, 255, .09);
        }
        .process-step {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent), #ffb85c);
            color: #1c2440;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .process-item h4 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .process-item p {
            color: rgba(255, 255, 255, .62);
            font-size: .88rem;
            margin: 0;
            line-height: 1.65;
        }

        /* ========== 专题推荐 ========== */
        .feature-line {
            display: grid;
            grid-template-columns: 1fr 1.6fr;
            gap: 26px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            margin-bottom: 22px;
            transition: all .3s ease;
        }
        .feature-line:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(43, 58, 143, .2);
            transform: translateY(-3px);
        }
        .feature-cover {
            position: relative;
            min-height: 220px;
            overflow: hidden;
        }
        .feature-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }
        .feature-body {
            padding: 30px 30px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .feature-body .badge-tag {
            align-self: flex-start;
            margin-bottom: 12px;
        }
        .feature-body h3 {
            font-size: 1.28rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-body p {
            color: var(--text-weak);
            margin-bottom: 18px;
            line-height: 1.7;
        }
        .feature-meta {
            display: flex;
            align-items: center;
            gap: 18px;
            font-size: .84rem;
            color: var(--text-weak);
        }
        .feature-meta i {
            margin-right: 5px;
            color: var(--accent);
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--surface);
        }
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            background: #fbfcff;
            overflow: hidden;
            transition: all .25s ease;
        }
        .faq-item:hover {
            border-color: rgba(43, 58, 143, .25);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: .98rem;
            color: var(--text);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            color: var(--primary);
            transition: transform .3s ease;
            font-size: .9rem;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            display: none;
            padding: 0 22px 20px;
            color: var(--text-weak);
            font-size: .93rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            padding: 5rem 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary) 60%, var(--cyan));
            color: #fff;
            text-align: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: .14;
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-card-inner {
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-section h2 {
            font-size: clamp(1.7rem, 3vw, 2.5rem);
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, .8);
            margin-bottom: 28px;
            font-size: 1.05rem;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--surface-dark);
            color: rgba(255, 255, 255, .72);
            padding: 4.5rem 0 0;
        }
        .footer-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }
        .footer-brand span {
            color: var(--accent);
        }
        .footer-desc {
            color: rgba(255, 255, 255, .58);
            font-size: .92rem;
            line-height: 1.75;
            max-width: 320px;
        }
        .footer-title {
            font-size: .95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: .5px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a,
        .footer-links span {
            color: rgba(255, 255, 255, .58);
            font-size: .9rem;
            transition: all .2s ease;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            margin-top: 3.5rem;
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 20px 0;
            text-align: center;
            color: rgba(255, 255, 255, .4);
            font-size: .85rem;
        }
        .footer-bottom p {
            margin: 0;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 820px) {
            :root {
                --space-section: 3.8rem;
            }
            .feature-line {
                grid-template-columns: 1fr;
            }
            .feature-cover {
                min-height: 180px;
                position: relative;
            }
            .feature-cover img {
                position: static;
                height: 180px;
            }
            .page-hero {
                padding: 4.6rem 0 4rem;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 18px;
            }
            .stats-grid,
            .process-grid {
                grid-template-columns: 1fr;
            }
            .brand-center {
                font-size: 1.18rem;
            }
            .nav-link-custom {
                padding: 7px 14px;
                font-size: .88rem;
            }
            .page-hero h1 {
                font-size: 1.95rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .section-head {
                margin-bottom: 2rem;
            }
            .topic-img {
                height: 140px;
            }
            .entry-img {
                height: 140px;
            }
            .feature-body {
                padding: 22px;
            }
            .feature-meta {
                flex-wrap: wrap;
                gap: 10px;
            }
            .footer-bottom {
                padding: 16px 12px;
            }
        }

        @media (max-width: 520px) {
            .brand-center {
                font-size: 1.05rem;
                letter-spacing: 0;
            }
            .btn {
                padding: 10px 20px;
                font-size: .9rem;
            }
            .section-head h2 {
                font-size: 1.45rem;
            }
            .page-hero p.lead-text {
                font-size: 1rem;
            }
            .topic-body {
                padding: 18px 16px;
            }
            .entry-body {
                padding: 16px 16px 20px;
            }
            .faq-question {
                padding: 15px 16px;
                font-size: .92rem;
            }
            .faq-answer {
                padding: 0 16px 16px;
            }
        }