/* roulang page: index */
/* ========== 设计变量 ========== */
        :root {
            --primary: #0ea5e9;
            --primary-dark: #0369a1;
            --primary-light: #e0f2fe;
            --accent: #f59e0b;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --ink: #0f172a;
            --ink-light: #475569;
            --ink-faint: #94a3b8;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 14px 40px rgba(15, 23, 42, 0.12);
            --spacing: 24px;
            --header-h: 76px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--ink);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

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

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

        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }

        input,
        textarea {
            font-family: inherit;
        }

        ul {
            list-style: none;
        }

        /* ========== 容器 ========== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .container-narrow {
            max-width: 860px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== 顶部导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            height: var(--header-h);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.07);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            font-size: 1.5rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--ink);
            line-height: 1.2;
            white-space: nowrap;
        }

        .site-logo span {
            color: var(--primary);
            font-weight: 600;
            margin-left: 2px;
        }

        .site-logo i {
            color: var(--primary);
            margin-right: 8px;
            font-size: 1.4rem;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--ink-light);
            padding: 6px 2px;
            transition: color var(--transition);
        }

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

        .nav-link:hover,
        .nav-link.active {
            color: var(--primary-dark);
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }

        .nav-btn {
            margin-left: 8px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            border-radius: 8px;
            background: var(--primary-light);
            transition: background var(--transition);
        }

        .nav-toggle span {
            display: block;
            height: 2px;
            border-radius: 2px;
            background: var(--primary-dark);
            transition: transform var(--transition), opacity var(--transition);
        }

        .nav-toggle:hover {
            background: #c7e6fb;
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.95rem;
            font-weight: 600;
            padding: 12px 24px;
            border-radius: 999px;
            transition: all var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(2, 132, 199, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(2, 132, 199, 0.3);
        }

        .btn-outline {
            border-color: #fff;
            color: #fff;
            background: transparent;
            backdrop-filter: blur(4px);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.8);
            transform: translateY(-2px);
        }

        .btn-warm {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }

        .btn-warm:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
        }

        .btn:focus-visible {
            outline: 3px solid rgba(14, 165, 233, 0.4);
            outline-offset: 2px;
        }

        /* ========== 徽章 / 标签 ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary-dark);
            border: 1px solid rgba(14, 165, 233, 0.2);
        }

        .badge-accent {
            background: #fef3c7;
            color: #b45309;
            border-color: rgba(245, 158, 11, 0.25);
        }

        .badge-green {
            background: #ecfdf5;
            color: #047857;
            border-color: rgba(16, 185, 129, 0.25);
        }

        /* ========== Hero 板块 ========== */
        .hero {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            background-image: linear-gradient(78deg, rgba(2, 6, 23, 0.88) 0%, rgba(2, 6, 23, 0.62) 45%, rgba(2, 6, 23, 0.35) 100%),
                url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            color: #fff;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            right: -10%;
            top: -20%;
            width: 460px;
            height: 460px;
            background: radial-gradient(circle, rgba(14, 165, 233, 0.3), transparent 70%);
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            padding: 80px 0;
            max-width: 680px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 0.85rem;
            font-weight: 500;
            backdrop-filter: blur(8px);
            margin-bottom: 24px;
            color: rgba(255, 255, 255, 0.9);
        }

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

        .hero-title {
            font-size: clamp(2.4rem, 5vw, 4rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            background: linear-gradient(120deg, #ffffff 60%, #bae6fd);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 540px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-top: 52px;
            max-width: 520px;
        }

        .hero-stat {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            border-radius: 14px;
            padding: 14px 12px;
            text-align: center;
        }

        .hero-stat-value {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
        }

        .hero-stat-label {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 2px;
        }

        /* ========== 通用板块 ========== */
        .section {
            padding: 88px 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-header {
            text-align: center;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
            margin-bottom: 52px;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .section-title {
            font-size: clamp(1.8rem, 3.4vw, 2.6rem);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            color: var(--ink);
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--ink-light);
            line-height: 1.8;
        }

        /* ========== 分类卡片 ========== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .category-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow);
            display: flex;
            flex-direction: column;
        }

        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(14, 165, 233, 0.35);
        }

        .category-card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

        .category-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        .category-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(2, 6, 23, 0.45), transparent 60%);
        }

        .category-card-body {
            padding: 26px 28px 30px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .category-card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
        }

        .category-card-body p {
            font-size: 0.92rem;
            color: var(--ink-light);
            line-height: 1.7;
            margin-bottom: 20px;
            flex: 1;
        }

        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            transition: gap var(--transition);
        }

        .category-link:hover {
            gap: 10px;
        }

        /* ========== 特色功能卡片 ========== */
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 26px;
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(14, 165, 233, 0.3);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 18px;
        }

        .feature-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--ink-light);
            line-height: 1.7;
        }

        /* ========== 流程步骤 ========== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-item {
            position: relative;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            text-align: center;
            transition: all var(--transition);
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .step-number {
            position: relative;
            width: 56px;
            height: 56px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 16px rgba(2, 132, 199, 0.28);
        }

        .step-item h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.88rem;
            color: var(--ink-light);
            line-height: 1.7;
        }

        /* ========== 最新资讯 ========== */
        .news-section {
            background: linear-gradient(180deg, #f8fafc 0%, #eef7ff 100%);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .news-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 26px 28px;
            display: flex;
            flex-direction: column;
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }

        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(14, 165, 233, 0.25);
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }

        .news-date {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            color: var(--ink-faint);
        }

        .news-date i {
            color: var(--primary);
        }

        .news-cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary-dark);
            background: var(--primary-light);
            padding: 2px 10px;
            border-radius: 999px;
        }

        .news-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.5;
            color: var(--ink);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card p {
            font-size: 0.9rem;
            color: var(--ink-light);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            margin-top: auto;
        }

        .news-more i {
            transition: transform var(--transition);
        }

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

        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px;
            color: var(--ink-faint);
            font-size: 0.95rem;
            background: #fff;
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color var(--transition);
        }

        .faq-item.open {
            border-color: rgba(14, 165, 233, 0.3);
            box-shadow: var(--shadow);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--ink);
            text-align: left;
            background: none;
            cursor: pointer;
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: var(--bg-alt);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: transform var(--transition), background var(--transition);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .faq-answer-inner {
            padding: 0 24px 22px;
            font-size: 0.92rem;
            color: var(--ink-light);
            line-height: 1.8;
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            background-image: linear-gradient(90deg, rgba(2, 6, 23, 0.88), rgba(14, 165, 233, 0.72)),
                url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            padding: 88px 0;
            color: #fff;
            text-align: center;
        }

        .cta-title {
            font-size: clamp(1.8rem, 3.4vw, 2.6rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .cta-desc {
            max-width: 620px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
        }

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

        /* ========== 页脚 ========== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .site-logo {
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition), padding-left var(--transition);
        }

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

        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 0.82rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 0;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

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

        /* ========== 响应式断点 ========== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .steps {
                grid-template-columns: repeat(2, 1fr);
            }

            .grid-3 {
                gap: 20px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .site-header {
                height: auto;
                min-height: 64px;
            }

            .header-inner {
                flex-wrap: wrap;
                padding: 12px 0;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 6px;
                padding: 12px 0 16px;
                align-items: stretch;
            }

            .main-nav.open {
                display: flex;
            }

            .nav-link {
                font-size: 0.95rem;
                padding: 12px 8px;
                border-radius: 8px;
            }

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

            .nav-link::after {
                display: none;
            }

            .nav-btn {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }

            .hero {
                min-height: auto;
            }

            .hero-inner {
                padding: 64px 0;
            }

            .hero-title {
                font-size: 2.2rem;
            }

            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 8px;
                margin-top: 36px;
            }

            .section {
                padding: 64px 0;
            }

            .grid-3,
            .news-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .cta-section {
                padding: 64px 0;
            }
        }

        @media (max-width: 520px) {
            .grid-4 {
                grid-template-columns: 1fr;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .hero-stat {
                padding: 10px 6px;
            }

            .hero-stat-value {
                font-size: 1.1rem;
            }

            .hero-stat-label {
                font-size: 0.72rem;
            }

            .section-title {
                font-size: 1.6rem;
            }

            .news-card {
                padding: 20px;
            }
        }

        /* ========== 可访问性 Focus ========== */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(14, 165, 233, 0.4);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ========== 辅助 ========== */
        .mt-8 {
            margin-top: 32px;
        }

        .text-center {
            text-align: center;
        }

        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2b4c;
            --primary-light: #2a3f6a;
            --primary-dark: #0f1e38;
            --accent: #d4a24e;
            --accent-light: #e8c172;
            --accent-dark: #b8863b;
            --bg: #f5f7fb;
            --bg-white: #ffffff;
            --bg-dark: #0f1e38;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            width: min(1200px, 92%);
            margin-inline: auto;
        }

        /* ===== 头部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 10px rgba(15, 30, 56, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }

        .site-logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }

        .site-logo span {
            color: var(--accent);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 26px;
        }

        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            padding: 8px 2px;
            position: relative;
            line-height: 1.4;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }

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

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
            line-height: 1.4;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(212, 162, 78, 0.4);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26, 43, 76, 0.2);
        }

        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 43, 76, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline {
            border: 2px solid var(--border);
            color: var(--text);
            background: transparent;
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(212, 162, 78, 0.06);
        }

        .btn-accent {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(212, 162, 78, 0.3);
        }

        .btn-accent:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(212, 162, 78, 0.4);
        }

        .nav-btn {
            padding: 10px 20px;
            font-size: 0.9rem;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 42px;
            height: 42px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            border-color: var(--accent);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Hero ===== */
        .hero-banner {
            position: relative;
            padding: 110px 0 130px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }

        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 30, 56, 0.92) 0%, rgba(15, 30, 56, 0.72) 50%, rgba(15, 30, 56, 0.35) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            background: rgba(212, 162, 78, 0.15);
            border: 1px solid rgba(212, 162, 78, 0.35);
            border-radius: 50px;
            color: var(--accent-light);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }

        .hero-title {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -1px;
            margin-bottom: 18px;
        }

        .hero-title span {
            color: var(--accent);
        }

        .hero-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 620px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .breadcrumb {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 28px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }

        .breadcrumb a:hover {
            color: var(--accent-light);
        }

        .breadcrumb i {
            font-size: 0.7rem;
        }

        /* ===== 板块 ===== */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: var(--bg-white);
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 52px;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(212, 162, 78, 0.12);
            border: 1px solid rgba(212, 162, 78, 0.3);
            border-radius: 50px;
            color: var(--accent-dark);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: clamp(1.8rem, 3.2vw, 2.5rem);
            font-weight: 800;
            color: var(--primary-dark);
            line-height: 1.3;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .section-desc {
            color: var(--text-light);
            font-size: 1rem;
            line-height: 1.8;
        }

        /* ===== 平台简介 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .intro-media {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .intro-media img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }

        .intro-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(15, 30, 56, 0.4));
            pointer-events: none;
        }

        .intro-content .intro-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 20px;
            line-height: 1.4;
        }

        .intro-content p {
            color: var(--text-light);
            margin-bottom: 16px;
            line-height: 1.9;
        }

        .intro-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 24px;
        }

        .intro-tags .tag {
            padding: 6px 16px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 50px;
            font-size: 0.82rem;
            color: var(--text);
            font-weight: 500;
        }

        /* ===== 功能卡片 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-align: center;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-5px);
            border-color: rgba(212, 162, 78, 0.4);
        }

        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            box-shadow: 0 6px 16px rgba(26, 43, 76, 0.2);
        }

        .feature-card:nth-child(2) .feature-icon {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--primary-dark);
            box-shadow: 0 6px 16px rgba(212, 162, 78, 0.3);
        }

        .feature-card:nth-child(3) .feature-icon {
            background: linear-gradient(135deg, #3a7ca5, #5ba3d0);
        }

        .feature-card:nth-child(4) .feature-icon {
            background: linear-gradient(135deg, #6878b8, #8b96e0);
        }

        .feature-card:nth-child(5) .feature-icon {
            background: linear-gradient(135deg, #3a8a7a, #5bb8a8);
        }

        .feature-card:nth-child(6) .feature-icon {
            background: linear-gradient(135deg, #d47a5a, #e8a080);
        }

        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== 流程 ===== */
        .steps-wrapper {
            position: relative;
            padding: 0 20px;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
        }

        .steps-grid::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(to right, var(--accent), rgba(212, 162, 78, 0.2));
            z-index: 0;
        }

        .step-item {
            position: relative;
            z-index: 1;
            text-align: center;
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 30px 20px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .step-num {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.4rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 4px solid var(--accent);
            box-shadow: 0 4px 12px rgba(26, 43, 76, 0.2);
        }

        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            background: var(--bg-dark);
            color: #fff;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .stat-card {
            padding: 40px 24px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
        }

        .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent-light);
            margin-bottom: 8px;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
        }

        .stat-icon {
            font-size: 1.8rem;
            color: var(--accent);
            margin-bottom: 16px;
        }

        /* ===== 使用技巧 ===== */
        .media-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

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

        .media-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .media-image {
            position: relative;
            overflow: hidden;
            height: 220px;
        }

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

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

        .media-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(15, 30, 56, 0.25));
        }

        .media-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            padding: 5px 14px;
            background: rgba(15, 30, 56, 0.75);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 50px;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .media-body {
            padding: 28px;
        }

        .media-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .media-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.8;
        }

        .media-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 16px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--accent-dark);
        }

        .media-link:hover {
            color: var(--primary);
            gap: 12px;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(212, 162, 78, 0.4);
            box-shadow: var(--shadow);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            width: 100%;
            padding: 20px 24px;
            background: transparent;
            cursor: pointer;
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(212, 162, 78, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-dark);
            font-size: 0.8rem;
            transition: var(--transition);
        }

        .faq-item.active .faq-icon {
            background: var(--accent);
            color: #fff;
            transform: rotate(45deg);
        }

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

        .faq-answer p {
            padding: 0 24px 22px;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 18px;
            margin-top: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 80px 0;
            background: linear-gradient(120deg, #0f1e38, #1a2b4c, #1e4059);
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(212, 162, 78, 0.12), transparent 70%);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding-top: 60px;
            border-top: 4px solid var(--accent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .site-logo {
            color: #fff;
            margin-bottom: 16px;
        }

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

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 340px;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 2px;
            background: var(--accent);
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps-grid::before {
                display: none;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .intro-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 0 20px;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 10px 20px rgba(15, 30, 56, 0.08);
            }

            .main-nav.open {
                max-height: 400px;
                padding: 16px 20px 20px;
            }

            .main-nav .nav-link {
                width: 100%;
                padding: 14px 0;
                font-size: 1rem;
            }

            .nav-link::after {
                display: none;
            }

            .nav-link.active {
                color: var(--accent-dark);
            }

            .nav-btn {
                width: 100%;
                margin-top: 8px;
            }

            .hero-banner {
                padding: 80px 0 90px;
            }

            .section {
                padding: 56px 0;
            }

            .feature-grid,
            .steps-grid,
            .media-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-card {
                padding: 28px 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .hero-actions,
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
                width: 100%;
            }

            .hero-actions .btn,
            .cta-actions .btn {
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                height: 64px;
            }

            .site-logo {
                font-size: 1.15rem;
            }

            .main-nav {
                top: 64px;
            }

            .hero-title {
                font-size: 1.9rem;
            }

            .hero-desc {
                font-size: 1rem;
            }

            .feature-grid,
            .stats-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .section-head {
                margin-bottom: 36px;
            }

            .section-title {
                font-size: 1.6rem;
            }
        }

/* roulang page: article */
:root {
            --brand-50: #eef4fa;
            --brand-100: #d9e6f3;
            --brand-600: #1e3a5f;
            --brand-700: #182f4d;
            --brand-800: #12233a;
            --accent-500: #f59e0b;
            --accent-600: #d97706;
            --text-main: #1e293b;
            --text-sub: #64748b;
            --border-light: #e2e8f0;
            --bg-soft: #f8fafc;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--text-main);
            background: var(--bg-soft);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            transition: box-shadow 0.35s ease, background 0.35s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 8px 32px rgba(30, 58, 95, 0.1);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--brand-600);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }

        .site-logo i {
            font-size: 26px;
            color: var(--accent-500);
            transition: transform 0.3s ease;
        }

        .site-logo:hover i {
            transform: rotate(-12deg) scale(1.05);
        }

        .site-logo span {
            color: var(--accent-600);
            font-weight: 700;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 500;
            color: #334155;
            transition: all 0.25s ease;
            position: relative;
        }

        .nav-link:hover {
            color: var(--brand-600);
            background: var(--brand-50);
        }

        .nav-link.active {
            color: var(--brand-600);
            background: var(--brand-50);
            font-weight: 700;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent-500);
            border-radius: 4px;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            padding: 10px;
            border-radius: 8px;
            z-index: 1100;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--brand-600);
            margin: 5px 0;
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 15px;
            border: 2px solid transparent;
            transition: all 0.25s ease;
            text-decoration: none;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--brand-600);
            color: #fff;
            box-shadow: 0 4px 16px rgba(30, 58, 95, 0.25);
        }

        .btn-primary:hover {
            background: var(--brand-700);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(30, 58, 95, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(30, 58, 95, 0.2);
        }

        .btn-accent {
            background: var(--accent-500);
            color: #1e293b;
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
        }

        .btn-accent:hover {
            background: var(--accent-600);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(217, 119, 6, 0.3);
        }

        .btn-nav {
            padding: 10px 22px;
            font-size: 14px;
            margin-left: 10px;
        }

        .article-hero {
            background:
                linear-gradient(135deg, rgba(18, 35, 58, 0.94), rgba(30, 58, 95, 0.88)),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 150px 0 80px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.2) 0%, transparent 70%);
            border-radius: 50%;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            transition: color 0.2s;
        }

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

        .breadcrumb i {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        .article-hero .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(245, 158, 11, 0.2);
            border: 1px solid rgba(245, 158, 11, 0.4);
            color: #fbd163;
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 18px;
        }

        .article-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
            max-width: 800px;
        }

        .article-hero .lead {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 720px;
            margin-bottom: 24px;
            line-height: 1.7;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-main {
            padding: 60px 0;
        }

        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: #334155;
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--brand-600);
            margin-top: 36px;
            margin-bottom: 18px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--brand-50);
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--brand-600);
            margin-top: 28px;
            margin-bottom: 14px;
        }

        .article-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: #334155;
            margin-top: 20px;
            margin-bottom: 10px;
        }

        .article-body p {
            margin-bottom: 18px;
        }

        .article-body ul,
        .article-body ol {
            margin-bottom: 18px;
            padding-left: 26px;
        }

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

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

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body img {
            border-radius: 14px;
            margin: 24px 0;
            box-shadow: var(--tw-shadow-card, 0 4px 16px rgba(30, 58, 95, 0.1));
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent-500);
            background: #fff8eb;
            padding: 16px 24px;
            border-radius: 0 14px 14px 0;
            margin: 24px 0;
            color: #92600a;
        }

        .article-body blockquote p {
            margin-bottom: 0;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
        }

        .article-body table th,
        .article-body table td {
            border: 1px solid var(--border-light);
            padding: 12px 16px;
            text-align: left;
        }

        .article-body table th {
            background: var(--brand-50);
            font-weight: 600;
            color: var(--brand-600);
        }

        .article-body a {
            color: var(--accent-600);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-body code {
            background: #f1f5f9;
            padding: 3px 8px;
            border-radius: 6px;
            font-size: 14px;
            color: var(--brand-600);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: var(--brand-50);
            color: var(--brand-600);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
        }

        .share-box {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 24px;
            flex-wrap: wrap;
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--border-light);
            background: #fff;
            color: #475569;
            transition: all 0.2s ease;
        }

        .share-btn:hover {
            border-color: var(--brand-600);
            color: var(--brand-600);
            background: var(--brand-50);
        }

        .side-card {
            background: #fff;
            border-radius: 18px;
            padding: 24px;
            box-shadow: 0 4px 16px rgba(30, 58, 95, 0.07);
            margin-bottom: 24px;
            border: 1px solid rgba(226, 232, 240, 0.5);
            transition: box-shadow 0.3s ease;
        }

        .side-card:hover {
            box-shadow: 0 8px 28px rgba(30, 58, 95, 0.1);
        }

        .side-card-title {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 17px;
            font-weight: 700;
            color: var(--brand-600);
            margin-bottom: 18px;
        }

        .side-card-title i {
            color: var(--accent-500);
            font-size: 18px;
        }

        .side-category-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 14px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: #334155;
            transition: all 0.2s ease;
        }

        .side-category-item:hover {
            background: var(--brand-50);
            color: var(--brand-600);
        }

        .side-post-item {
            display: flex;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px dashed var(--border-light);
            align-items: flex-start;
        }

        .side-post-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .side-post-item .num {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 13px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .side-post-item a {
            font-size: 14px;
            line-height: 1.5;
            color: #475569;
            transition: color 0.2s;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .side-post-item a:hover {
            color: var(--brand-600);
        }

        .security-card {
            background: linear-gradient(135deg, #fff8eb, #fef3c7);
            border: 1px solid #fde68a;
            border-radius: 18px;
            padding: 24px;
            margin-bottom: 24px;
        }

        .security-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: #92400e;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .security-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .security-card li {
            font-size: 13px;
            color: #78350f;
            padding: 6px 0;
            padding-left: 20px;
            position: relative;
            line-height: 1.6;
        }

        .security-card li::before {
            content: '•';
            position: absolute;
            left: 4px;
            color: #d97706;
            font-weight: 700;
        }

        .rel-section {
            background: #fff;
            padding: 70px 0;
        }

        .rel-card {
            background: #fff;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(30, 58, 95, 0.08);
            border: 1px solid var(--border-light);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .rel-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 16px 40px rgba(30, 58, 95, 0.14);
        }

        .rel-card img {
            width: 100%;
            height: 190px;
            object-fit: cover;
        }

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

        .rel-card .badge {
            align-self: flex-start;
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
        }

        .rel-card h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text-main);
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .rel-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .rel-card .read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-600);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .rel-card .read-more:hover {
            gap: 10px;
        }

        .faq-section {
            padding: 70px 0;
            background: var(--bg-soft);
        }

        .faq-item {
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--border-light);
            margin-bottom: 16px;
            overflow: hidden;
            transition: box-shadow 0.3s ease;
        }

        .faq-item:hover {
            box-shadow: 0 8px 28px rgba(30, 58, 95, 0.08);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            list-style: none;
            position: relative;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary i.fa-chevron-down {
            margin-left: auto;
            transition: transform 0.3s ease;
            color: var(--accent-500);
        }

        .faq-item[open] summary i.fa-chevron-down {
            transform: rotate(180deg);
        }

        .faq-item summary .q-icon {
            width: 32px;
            height: 32px;
            background: var(--brand-50);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-600);
            font-size: 14px;
            flex-shrink: 0;
        }

        .faq-item .answer {
            padding: 0 24px 22px 70px;
            font-size: 15px;
            color: #64748b;
            line-height: 1.75;
        }

        .cta-section {
            padding: 0 0 70px;
            background: var(--bg-soft);
        }

        .cta-box {
            background:
                linear-gradient(120deg, rgba(18, 35, 58, 0.95), rgba(47, 90, 140, 0.9)),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-radius: 28px;
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.3), transparent 70%);
            border-radius: 50%;
        }

        .cta-box h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }

        .cta-box p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 580px;
            margin: 0 auto 30px;
        }

        .site-footer {
            background: var(--brand-800);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .site-logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
        }

        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }

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

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-links a:hover {
            color: var(--accent-400);
            transform: translateX(4px);
        }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom p {
            margin: 0;
        }

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

        .section-title-wrap .sub-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            background: var(--brand-50);
            border-radius: 16px;
            color: var(--brand-600);
            font-size: 22px;
            margin-bottom: 14px;
        }

        .section-title-wrap h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.3px;
        }

        .section-title-wrap p {
            font-size: 15px;
            color: var(--text-sub);
            margin-top: 8px;
        }

        .not-found-box {
            text-align: center;
            padding: 70px 30px;
            background: #fff;
            border-radius: 24px;
            box-shadow: 0 4px 16px rgba(30, 58, 95, 0.07);
        }

        .not-found-box i {
            font-size: 56px;
            color: #cbd5e1;
            margin-bottom: 20px;
        }

        .not-found-box h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .not-found-box p {
            color: var(--text-sub);
            margin-bottom: 24px;
        }

        @media (max-width: 1023px) {
            .nav-toggle {
                display: block;
            }

            .main-nav {
                position: fixed;
                top: 0;
                right: -100%;
                width: min(360px, 85%);
                height: 100vh;
                background: #fff;
                flex-direction: column;
                justify-content: flex-start;
                padding: 90px 28px 28px;
                gap: 10px;
                transition: right 0.35s ease;
                box-shadow: -20px 0 60px rgba(30, 58, 95, 0.15);
                z-index: 1050;
            }

            .main-nav.open {
                right: 0;
            }

            .main-nav .nav-link {
                font-size: 17px;
                padding: 14px 20px;
                width: 100%;
            }

            .main-nav .nav-link.active::after {
                bottom: 6px;
            }

            .nav-btn {
                margin-top: 20px;
                width: 100%;
                justify-content: center;
            }

            .header-inner {
                height: 64px;
            }

            .article-hero {
                padding: 120px 0 60px;
            }

            .article-hero h1 {
                font-size: 32px;
            }

            .article-hero .lead {
                font-size: 15px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .article-hero h1 {
                font-size: 26px;
            }

            .article-hero .lead {
                font-size: 14px;
            }

            .article-meta {
                gap: 12px;
                font-size: 13px;
            }

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

            .cta-box {
                padding: 40px 24px;
                border-radius: 20px;
            }

            .cta-box h2 {
                font-size: 24px;
            }

            .faq-item summary {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-item .answer {
                padding: 0 18px 18px 52px;
                font-size: 14px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .site-logo {
                font-size: 19px;
            }

            .article-hero h1 {
                font-size: 34px;
            }

            .section-title-wrap h2 {
                font-size: 25px;
            }
        }

        @media (max-width: 520px) {
            .article-hero {
                padding: 110px 0 50px;
            }

            .article-hero h1 {
                font-size: 24px;
            }

            .breadcrumb {
                font-size: 13px;
            }

            .article-body {
                font-size: 15px;
            }

            .side-card {
                padding: 18px;
            }

            .rel-card img {
                height: 150px;
            }

            .rel-card .card-body {
                padding: 18px;
            }

            .cta-box h2 {
                font-size: 22px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1d4ed8;
            --primary-dark: #1e3a8a;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(15, 23, 42, .08);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, .12);
            --transition: all .3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font: inherit;
            border: none;
            outline: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, .8);
            box-shadow: 0 1px 12px rgba(15, 23, 42, .04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 24px;
        }

        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: .5px;
            white-space: nowrap;
        }

        .site-logo i {
            font-size: 24px;
            color: var(--primary);
            background: linear-gradient(135deg, #2563eb, #1e40af);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .site-logo span {
            color: var(--accent);
            font-weight: 700;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: #eff6ff;
        }

        .nav-link.active {
            color: var(--primary-dark);
            background: #eff6ff;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 4px;
            height: 3px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        .nav-btn {
            margin-left: 8px;
            white-space: nowrap;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 4px;
            transition: var(--transition);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: absolute;
                top: 74px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 16px 40px rgba(15, 23, 42, .1);
                display: none;
            }

            .main-nav.open {
                display: flex;
            }

            .nav-link,
            .nav-btn {
                padding: 12px 16px;
                border-radius: 12px;
                margin: 0;
                text-align: center;
            }

            .nav-link.active::after {
                display: none;
            }

            .nav-btn {
                margin-top: 8px;
            }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 6px 20px rgba(29, 78, 216, .35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(29, 78, 216, .45);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, .6);
            color: #fff;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, .15);
            border-color: #fff;
            color: #fff;
        }

        .btn-light {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(15, 23, 42, .1);
        }

        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(15, 23, 42, .15);
            color: var(--primary);
        }

        /* ===== 页面 Hero/Banner ===== */
        .page-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 23, 42, .88), rgba(30, 64, 175, .82)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #fff;
            padding: 88px 0 72px;
            text-align: center;
        }

        .page-breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .75);
            background: rgba(255, 255, 255, .1);
            padding: 6px 18px;
            border-radius: 50px;
            backdrop-filter: blur(8px);
            margin-bottom: 20px;
        }

        .page-breadcrumb a:hover {
            color: var(--accent-light);
        }

        .page-breadcrumb i {
            font-size: 10px;
            color: rgba(255, 255, 255, .5);
        }

        .hero-title {
            font-size: clamp(30px, 5vw, 48px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }

        .hero-title .highlight {
            background: linear-gradient(90deg, #fbbf24, #f59e0b);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-subtitle {
            max-width: 720px;
            margin: 0 auto 28px;
            font-size: 17px;
            color: rgba(255, 255, 255, .85);
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 88px 0;
        }

        .section.white {
            background: #fff;
        }

        .section-alt {
            background: #f1f5f9;
        }

        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 52px;
        }

        .section-tag {
            display: inline-block;
            background: #eff6ff;
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: 50px;
            letter-spacing: 1px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .section-title {
            font-size: clamp(26px, 4vw, 38px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.8;
        }

        /* ===== 快速入口卡片 ===== */
        .quick-cards-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .quick-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .quick-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

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

        .quick-card:hover::before {
            opacity: 1;
        }

        .quick-card-icon {
            width: 58px;
            height: 58px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: #fff;
            background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
            margin-bottom: 18px;
            box-shadow: 0 8px 20px rgba(29, 78, 216, .25);
        }

        .quick-card-icon.orange {
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
            box-shadow: 0 8px 20px rgba(245, 158, 11, .3);
        }

        .quick-card-icon.green {
            background: linear-gradient(135deg, #34d399, #059669);
            box-shadow: 0 8px 20px rgba(5, 150, 105, .25);
        }

        .quick-card-icon.purple {
            background: linear-gradient(135deg, #a78bfa, #7c3aed);
            box-shadow: 0 8px 20px rgba(124, 58, 237, .25);
        }

        .quick-card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .quick-card-desc {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .quick-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .quick-card-link i {
            font-size: 12px;
            transition: var(--transition);
        }

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

        @media (max-width: 1024px) {
            .quick-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .quick-cards-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 登录流程步骤 ===== */
        .steps-section {
            background: #fff;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            text-align: center;
            padding: 24px 16px;
            border-radius: var(--radius);
            background: #f8fafc;
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: var(--primary-light);
        }

        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 6px 16px rgba(29, 78, 216, .3);
        }

        .step-icon {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .step-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .step-desc {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 常见问题排查 ===== */
        .trouble-layout {
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 48px;
            align-items: center;
        }

        .trouble-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .trouble-card {
            display: flex;
            gap: 16px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 20px 22px;
            transition: var(--transition);
        }

        .trouble-card:hover {
            box-shadow: var(--shadow);
            border-color: var(--primary-light);
            transform: translateX(4px);
        }

        .trouble-icon {
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            border-radius: 12px;
            background: #eff6ff;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .trouble-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }

        .trouble-card-desc {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        .trouble-image-wrap {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }

        .trouble-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .trouble-image-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(15, 23, 42, .85));
            color: #fff;
            padding: 32px 24px 20px;
        }

        .trouble-image-overlay h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .trouble-image-overlay p {
            font-size: 13px;
            color: rgba(255, 255, 255, .8);
        }

        @media (max-width: 900px) {
            .trouble-layout {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 安全提示深色区 ===== */
        .security-section {
            background: linear-gradient(135deg, rgba(15, 23, 42, .92), rgba(30, 64, 175, .85)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            color: #fff;
        }

        .security-section .section-title {
            color: #fff;
        }

        .security-section .section-desc {
            color: rgba(255, 255, 255, .75);
        }

        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .security-item {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .12);
            border-radius: var(--radius-sm);
            padding: 28px 22px;
            text-align: center;
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }

        .security-item:hover {
            background: rgba(255, 255, 255, .14);
            transform: translateY(-4px);
        }

        .security-icon {
            font-size: 30px;
            color: var(--accent-light);
            margin-bottom: 14px;
        }

        .security-title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .security-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, .75);
            line-height: 1.7;
        }

        @media (max-width: 900px) {
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .security-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: #fff;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: #f8fafc;
            border: 1px solid var(--border);
            border-radius: 14px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item.open {
            background: #fff;
            box-shadow: var(--shadow);
            border-color: var(--primary-light);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            text-align: left;
            transition: var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question i {
            font-size: 14px;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #eff6ff, #dbeafe);
        }

        .cta-inner {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 24px;
            padding: 52px 48px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            box-shadow: 0 16px 48px rgba(29, 78, 216, .3);
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: "";
            position: absolute;
            top: -40%;
            right: -10%;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .1);
        }

        .cta-title {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .cta-desc {
            font-size: 15px;
            color: rgba(255, 255, 255, .85);
            max-width: 420px;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            flex-shrink: 0;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        @media (max-width: 768px) {
            .cta-inner {
                flex-direction: column;
                text-align: center;
                padding: 40px 28px;
            }

            .cta-desc {
                margin: 0 auto;
            }

            .cta-actions {
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, .7);
            padding: 64px 0 28px;
        }

        .site-footer .site-logo {
            color: #fff;
            margin-bottom: 12px;
        }

        .site-footer .site-logo i {
            background: linear-gradient(135deg, #60a5fa, #3b82f6);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 44px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
            margin-top: 6px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary-light), var(--accent));
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
                text-align: center;
            }

            .footer-brand p {
                margin: 0 auto;
            }

            .footer-title::after {
                left: 50%;
                transform: translateX(-50%);
            }
        }

        /* ===== 通用工具 ===== */
        .text-center {
            text-align: center;
        }

        .mt-16 {
            margin-top: 16px;
        }

        .mb-24 {
            margin-bottom: 24px;
        }

/* roulang page: category3 */
:root {
            --primary: #234bc4;
            --primary-dark: #1c347c;
            --primary-light: #6092fa;
            --accent: #f5a623;
            --accent-dark: #b45309;
            --bg: #f1f5f9;
            --surface: #ffffff;
            --surface-2: #f8fafc;
            --text: #0f172a;
            --text-muted: #5b6b82;
            --border: #e2e8f0;
            --radius: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 4px 12px rgba(15, 23, 42, .05);
            --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
            --shadow-lg: 0 16px 44px rgba(15, 23, 42, .13);
            --font-sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, sans-serif;
            --header-h: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            color: var(--text);
            background: var(--bg);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

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

        ul,
        ol {
            list-style: none;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input,
        textarea {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: 1300px;
            margin-inline: auto;
            padding-inline: 1.25rem;
        }

        .section-pad {
            padding: 76px 0;
        }

        .section-pad-sm {
            padding: 48px 0;
        }

        .section-head {
            max-width: 680px;
            margin-bottom: 40px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: .82rem;
            font-weight: 700;
            letter-spacing: .08em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-head .eyebrow::before {
            content: "";
            width: 22px;
            height: 2px;
            border-radius: 4px;
            background: var(--accent);
        }

        .section-title {
            font-size: 2.05rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -.02em;
            margin-bottom: 14px;
        }

        .section-subtitle {
            color: var(--text-muted);
            font-size: 1.02rem;
            line-height: 1.7;
            max-width: 620px;
        }

        .bg-surface {
            background: var(--surface);
        }

        .bg-brand-800 {
            background: var(--primary-dark);
        }

        .text-muted {
            color: var(--text-muted);
        }

        .text-brand-600 {
            color: var(--primary);
        }

        .hover\:text-brand-600:hover {
            color: var(--primary);
        }

        .border-border {
            border-color: var(--border);
        }

        .rounded-2xl {
            border-radius: var(--radius-lg);
        }

        .shadow-sm {
            box-shadow: var(--shadow-sm);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 14px rgba(15, 23, 42, .04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
        }

        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 1.28rem;
            font-weight: 900;
            color: var(--primary);
            letter-spacing: -.02em;
            transition: color .2s;
        }

        .site-logo i {
            font-size: 1.45rem;
            color: var(--primary);
        }

        .site-logo span {
            color: var(--text);
            font-weight: 700;
        }

        .site-logo:hover {
            color: var(--primary-dark);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            padding: 11px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 12px;
            transition: border-color .2s;
        }

        .nav-toggle span {
            display: block;
            height: 2px;
            width: 100%;
            background: var(--text);
            border-radius: 3px;
            transition: transform .3s, opacity .3s, background .2s;
        }

        .nav-toggle:hover {
            border-color: var(--primary-light);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
            background: var(--primary);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
            background: var(--primary);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 9px 15px;
            border-radius: 10px;
            font-weight: 600;
            font-size: .94rem;
            color: var(--text-muted);
            transition: color .2s, background .2s;
        }

        .nav-link:hover {
            color: var(--primary);
            background: #eff4ff;
        }

        .nav-link.active {
            color: var(--primary);
            background: #eff4ff;
            font-weight: 700;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 15px;
            right: 15px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        .nav-btn {
            margin-left: 8px;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            border-radius: 12px;
            font-weight: 600;
            font-size: .93rem;
            line-height: 1.4;
            transition: transform .2s, box-shadow .2s, background .2s, border-color .2s, color .2s;
            white-space: nowrap;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #eff4ff;
        }

        .btn-glass {
            background: rgba(255, 255, 255, .14);
            border: 1px solid rgba(255, 255, 255, .35);
            color: #fff;
            backdrop-filter: blur(8px);
        }

        .btn-glass:hover {
            background: rgba(255, 255, 255, .24);
            border-color: rgba(255, 255, 255, .6);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: .87rem;
            border-radius: 10px;
        }

        .btn-lg {
            padding: 14px 30px;
            font-size: 1rem;
            border-radius: 14px;
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        .nav-toggle:focus-visible,
        .faq-question:focus-visible {
            outline: 3px solid rgba(96, 146, 250, .45);
            outline-offset: 2px;
        }

        /* Badges */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 5px 13px;
            border-radius: 999px;
            font-size: .75rem;
            font-weight: 700;
            line-height: 1.5;
            letter-spacing: .02em;
            white-space: nowrap;
        }

        .badge-blue {
            background: #eff4ff;
            color: var(--primary);
        }

        .badge-amber {
            background: #fef3c7;
            color: var(--accent-dark);
        }

        .badge-green {
            background: #ecfdf5;
            color: #047857;
        }

        .badge-red {
            background: #fef2f2;
            color: #b91c1c;
        }

        /** Hero/Banner **/
        .page-banner {
            position: relative;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: #fff;
            padding: 96px 0 80px;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, .78) 0%, rgba(15, 23, 42, .42) 100%);
        }

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

        .breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: .82rem;
            color: rgba(255, 255, 255, .78);
            padding: 8px 16px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .18);
            border-radius: 999px;
            margin-bottom: 22px;
            backdrop-filter: blur(6px);
        }

        .breadcrumb a {
            color: #fff;
            transition: color .2s;
        }

        .breadcrumb a:hover {
            color: #dbe7fe;
        }

        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -.03em;
            line-height: 1.15;
            margin-bottom: 16px;
        }

        .page-banner p {
            max-width: 720px;
            font-size: 1.08rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, .88);
            margin-bottom: 28px;
        }

        /* Cards */
        .card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform .25s, box-shadow .25s, border-color .25s;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: #c7d7f5;
        }

        .news-card img {
            transition: transform .4s;
        }

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

        .news-card .p-6 {
            position: relative;
        }

        /* Feature Card */
        .feature-card {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: transform .25s, box-shadow .25s;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        /* Side List */
        .side-list-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
            transition: background .2s;
        }

        .side-list-item:last-child {
            border-bottom: 0;
            padding-bottom: 0;
        }

        .side-list-item:hover {
            background: #f8fafc;
        }

        .side-list-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            flex-shrink: 0;
            border-radius: 10px;
            background: #eff4ff;
            color: var(--primary);
            font-size: .9rem;
        }

        /* Announcement */
        .announce-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 22px 26px;
            box-shadow: var(--shadow-sm);
            transition: transform .2s, box-shadow .2s, border-color .2s;
        }

        .announce-item:hover {
            transform: translateX(4px);
            border-color: #c7d7f5;
            box-shadow: var(--shadow-md);
        }

        .announce-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-top: 12px;
            margin-bottom: 8px;
        }

        .announce-item p {
            font-size: .92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .info-panel {
            background: var(--primary-dark);
            border-radius: var(--radius-lg);
            padding: 28px;
            color: #dbe7fe;
            line-height: 1.7;
            box-shadow: var(--shadow-md);
            position: relative;
            overflow: hidden;
        }

        .info-panel::after {
            content: "";
            position: absolute;
            right: -40px;
            top: -40px;
            width: 120px;
            height: 120px;
            background: rgba(255, 255, 255, .06);
            border-radius: 50%;
        }

        /* Timeline */
        .timeline {
            position: relative;
            padding-left: 36px;
        }

        .timeline::before {
            content: "";
            position: absolute;
            left: 11px;
            top: 6px;
            bottom: 10px;
            width: 2px;
            background: linear-gradient(180deg, var(--primary-light), var(--border));
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding-bottom: 34px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: "";
            position: absolute;
            left: -36px;
            top: 5px;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--surface);
            border: 3px solid var(--primary);
            box-shadow: 0 0 0 5px rgba(35, 75, 196, .12);
        }

        .timeline-item h4 {
            font-size: 1.03rem;
            font-weight: 700;
        }

        .timeline-item time {
            display: inline-block;
            font-size: .8rem;
            color: var(--text-muted);
            background: #f1f5f9;
            border-radius: 999px;
            padding: 2px 12px;
            margin: 4px 0 8px;
        }

        .timeline-item p {
            font-size: .92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .version-tag {
            display: inline-block;
            font-size: .75rem;
            font-weight: 800;
            color: var(--primary);
            background: #eff4ff;
            border: 1px solid #dbe7fe;
            border-radius: 8px;
            padding: 2px 10px;
            margin-left: 8px;
        }

        /* Stats */
        .stats-band {
            position: relative;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: #fff;
            padding: 84px 0;
        }

        .stats-band::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, .92) 0%, rgba(30, 60, 130, .82) 100%);
        }

        .stats-band .container {
            position: relative;
            z-index: 1;
        }

        .stat-card {
            text-align: center;
            padding: 36px 22px;
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .16);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(6px);
            transition: transform .25s, background .25s;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            background: rgba(255, 255, 255, .16);
        }

        .stat-card .num {
            font-size: 2.4rem;
            font-weight: 900;
            letter-spacing: -.02em;
            line-height: 1.2;
        }

        .stat-card .label {
            margin-top: 6px;
            font-size: .86rem;
            color: rgba(255, 255, 255, .8);
        }

        .progress-item {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .12);
            border-radius: var(--radius);
            padding: 18px 22px;
            margin-top: 14px;
            transition: background .2s;
        }

        .progress-item:hover {
            background: rgba(255, 255, 255, .12);
        }

        .progress-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: .88rem;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .progress-bar {
            height: 7px;
            background: rgba(255, 255, 255, .18);
            border-radius: 999px;
            overflow: hidden;
        }

        .progress-bar span {
            display: block;
            height: 100%;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--accent), #ffd28f);
            animation: growBar 1.2s ease both;
        }

        @keyframes growBar {
            from {
                width: 0;
            }
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background: var(--surface);
            overflow: hidden;
            margin-bottom: 14px;
            box-shadow: var(--shadow-sm);
            transition: border-color .2s, box-shadow .2s;
        }

        .faq-item.open {
            border-color: #bfd5fe;
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            width: 100%;
            padding: 20px 24px;
            font-size: 1.02rem;
            font-weight: 700;
            color: var(--text);
            text-align: left;
            background: transparent;
            transition: background .2s, color .2s;
        }

        .faq-question:hover {
            background: #f8fafc;
            color: var(--primary);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: #eff4ff;
            color: var(--primary);
            font-size: .9rem;
            transition: transform .3s, background .2s;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }

        .faq-answer p {
            padding: 0 24px 22px;
            color: var(--text-muted);
            font-size: .94rem;
            line-height: 1.75;
        }

        /* CTA */
        .cta-section {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 84px 0;
            color: #fff;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, .85) 0%, rgba(28, 52, 124, .78) 100%);
        }

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

        .cta-box {
            text-align: center;
            max-width: 760px;
            margin: 0 auto;
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -.02em;
            margin-bottom: 14px;
        }

        .cta-box p {
            color: rgba(255, 255, 255, .82);
            font-size: 1rem;
            line-height: 1.75;
            margin-bottom: 28px;
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 44px;
            border-bottom: 1px solid #1e293b;
        }

        .footer-brand .site-logo {
            color: #e2e8f0;
        }

        .footer-brand .site-logo i {
            color: #93b9fd;
        }

        .footer-brand .site-logo span {
            color: #e2e8f0;
        }

        .footer-brand p {
            margin-top: 16px;
            max-width: 340px;
            line-height: 1.75;
            font-size: .9rem;
        }

        .footer-title {
            color: #e2e8f0;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 18px;
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: #94a3b8;
            font-size: .9rem;
            transition: color .2s, padding-left .2s;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 22px 0 34px;
            font-size: .85rem;
            color: #64748b;
        }

        /* Focus & misc */
        a:focus-visible {
            outline: 3px solid rgba(96, 146, 250, .4);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .feature-card {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .section-pad {
                padding: 56px 0;
            }

            .section-title {
                font-size: 1.65rem;
            }

            .page-banner {
                padding: 68px 0 56px;
            }

            .page-banner h1 {
                font-size: 2rem;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--surface);
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                padding: 18px 24px 26px;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                display: none;
            }

            .main-nav.open {
                display: flex;
            }

            .nav-link {
                padding: 12px 14px;
                border-radius: 10px;
                font-size: 1rem;
            }

            .nav-link.active::after {
                display: none;
            }

            .nav-link.active {
                background: #eff4ff;
                color: var(--primary);
            }

            .nav-btn {
                margin-top: 12px;
                margin-left: 0;
                justify-content: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .stats-band {
                padding: 60px 0;
            }

            .stat-card {
                padding: 26px 16px;
            }

            .stat-card .num {
                font-size: 1.9rem;
            }

            .cta-section {
                padding: 56px 0;
            }

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

            .timeline {
                padding-left: 30px;
            }

            .timeline-item::before {
                left: -30px;
                width: 18px;
                height: 18px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-inline: 1rem;
            }

            .section-pad {
                padding: 44px 0;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .page-banner h1 {
                font-size: 1.72rem;
            }

            .page-banner p {
                font-size: .94rem;
            }

            .breadcrumb {
                font-size: .76rem;
            }

            .btn-lg {
                padding: 12px 22px;
                font-size: .92rem;
            }

            .announce-item {
                padding: 18px;
            }

            .stat-card .num {
                font-size: 1.65rem;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }