/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b1a30;
            --primary-light: #132a4a;
            --primary-dark: #060f1c;
            --accent: #f0b90b;
            --accent-hover: #d4a509;
            --accent-glow: rgba(240, 185, 11, 0.25);
            --bg-body: #f4f6f9;
            --bg-white: #ffffff;
            --bg-dark: #0b1a30;
            --bg-card: #ffffff;
            --text-primary: #0b1a30;
            --text-secondary: #4a5568;
            --text-muted: #8896ab;
            --text-inverse: #ffffff;
            --text-inverse-muted: rgba(255, 255, 255, 0.7);
            --border: #e2e8f0;
            --border-light: #f0f2f5;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --shadow-accent: 0 4px 20px rgba(240, 185, 11, 0.35);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
            --topbar-h: 40px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-body);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }

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

        /* ===== 顶部信息条 ===== */
        .topbar {
            background: var(--primary-dark);
            color: var(--text-inverse-muted);
            font-size: 13px;
            height: var(--topbar-h);
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .topbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .topbar__info {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .topbar__info span {
            opacity: 0.8;
        }
        .topbar__info strong {
            color: var(--accent);
            font-weight: 600;
        }
        .topbar__action a {
            color: var(--accent);
            font-weight: 500;
            padding: 4px 14px;
            border-radius: 20px;
            border: 1px solid var(--accent);
            font-size: 12px;
            transition: var(--transition);
        }
        .topbar__action a:hover {
            background: var(--accent);
            color: var(--primary-dark);
        }
        @media (max-width: 640px) {
            .topbar__info span {
                display: none;
            }
            .topbar__action a {
                padding: 3px 10px;
                font-size: 11px;
            }
        }

        /* ===== 主导航 ===== */
        .header {
            background: var(--bg-white);
            height: var(--header-h);
            display: flex;
            align-items: center;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .header__logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.5px;
        }
        .header__logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 20px;
            font-weight: 700;
        }
        .header__nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .header__nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
        }
        .header__nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: var(--transition);
        }
        .header__nav a:hover {
            color: var(--primary);
        }
        .header__nav a:hover::after {
            width: 100%;
        }
        .header__nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .header__nav a.active::after {
            width: 100%;
        }
        .header__actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header__actions .btn-primary {
            padding: 8px 22px;
            border-radius: 24px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            box-shadow: var(--shadow-accent);
        }
        .header__actions .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(240, 185, 11, 0.4);
        }
        .header__menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--bg-body);
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--text-primary);
            transition: var(--transition);
        }
        .header__menu-toggle:hover {
            background: var(--border);
        }
        @media (max-width: 768px) {
            .header__nav {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 12px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                z-index: 99;
            }
            .header__nav.open {
                display: flex;
            }
            .header__nav a {
                font-size: 16px;
                padding: 10px 0;
                width: 100%;
                border-bottom: 1px solid var(--border-light);
            }
            .header__nav a:last-child {
                border-bottom: none;
            }
            .header__nav a::after {
                display: none;
            }
            .header__menu-toggle {
                display: flex;
            }
            .header__actions .btn-primary {
                display: none;
            }
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            background: var(--primary-dark);
            overflow: hidden;
        }
        .hero__bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .hero__overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 26, 48, 0.92) 0%, rgba(11, 26, 48, 0.72) 60%, rgba(11, 26, 48, 0.88) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
            padding-top: 40px;
            padding-bottom: 40px;
        }
        .hero__content {
            max-width: 720px;
        }
        .hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(240, 185, 11, 0.15);
            border: 1px solid rgba(240, 185, 11, 0.25);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 24px;
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }
        .hero__title {
            font-size: 44px;
            font-weight: 800;
            color: var(--text-inverse);
            line-height: 1.15;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }
        .hero__title span {
            color: var(--accent);
        }
        .hero__desc {
            font-size: 18px;
            color: var(--text-inverse-muted);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 580px;
        }
        .hero__actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .hero__actions .btn-primary {
            padding: 14px 36px;
            border-radius: 30px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 16px;
            transition: var(--transition);
            box-shadow: var(--shadow-accent);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .hero__actions .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(240, 185, 11, 0.45);
        }
        .hero__actions .btn-outline {
            padding: 14px 36px;
            border-radius: 30px;
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            color: var(--text-inverse);
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .hero__actions .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(240, 185, 11, 0.08);
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 420px;
            }
            .hero__title {
                font-size: 30px;
            }
            .hero__desc {
                font-size: 16px;
            }
            .hero__actions .btn-primary,
            .hero__actions .btn-outline {
                padding: 12px 28px;
                font-size: 15px;
            }
        }
        @media (max-width: 520px) {
            .hero__title {
                font-size: 26px;
            }
            .hero__badge {
                font-size: 12px;
                padding: 4px 12px;
            }
        }

        /* ===== 滚动更新条 ===== */
        .ticker {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            overflow: hidden;
        }
        .ticker .container {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .ticker__label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 12px;
            padding: 4px 14px;
            border-radius: 20px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .ticker__list {
            display: flex;
            gap: 40px;
            animation: tickerScroll 28s linear infinite;
            white-space: nowrap;
        }
        .ticker__list span {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .ticker__list span::before {
            content: '●';
            color: var(--accent);
            font-size: 8px;
        }
        @keyframes tickerScroll {
            0% {
                transform: translateX(0);
            }
            100% {
                transform: translateX(-50%);
            }
        }
        @media (max-width: 640px) {
            .ticker__label {
                font-size: 11px;
                padding: 3px 10px;
            }
            .ticker__list span {
                font-size: 13px;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 72px 0;
        }
        .section__header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section__header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section__header p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section__header .tagline {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(240, 185, 11, 0.1);
            padding: 4px 18px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section__header h2 {
                font-size: 26px;
            }
            .section__header p {
                font-size: 15px;
            }
            .section__header {
                margin-bottom: 32px;
            }
        }

        /* ===== 核心优势卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(240, 185, 11, 0.2);
        }
        .feature-card__icon {
            width: 60px;
            height: 60px;
            border-radius: 18px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin: 0 auto 18px;
            color: var(--accent);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 900px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: 28px 20px 24px;
            }
        }

        /* ===== 分类入口 / 封面网格 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            min-height: 240px;
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .category-card__img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .category-card__body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card__body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .category-card__body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }
        .category-card__body .btn-link {
            color: var(--accent);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 12px;
            transition: var(--transition);
        }
        .category-card__body .btn-link:hover {
            gap: 10px;
            color: var(--accent-hover);
        }
        @media (max-width: 640px) {
            .category-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-card__img {
                height: 160px;
            }
        }

        /* ===== 最新资讯列表 (CMS) ===== */
        .news-list {
            display: grid;
            gap: 20px;
        }
        .news-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            align-items: flex-start;
            gap: 20px;
        }
        .news-item:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(240, 185, 11, 0.15);
        }
        .news-item__num {
            font-size: 28px;
            font-weight: 800;
            color: var(--border);
            min-width: 40px;
            line-height: 1;
            flex-shrink: 0;
        }
        .news-item__content {
            flex: 1;
            min-width: 0;
        }
        .news-item__content h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .news-item__content h3 a {
            color: var(--text-primary);
            transition: var(--transition);
        }
        .news-item__content h3 a:hover {
            color: var(--accent);
        }
        .news-item__meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 6px;
        }
        .news-item__meta .tag {
            background: rgba(240, 185, 11, 0.1);
            color: var(--accent);
            padding: 1px 10px;
            border-radius: 12px;
            font-weight: 500;
            font-size: 12px;
        }
        .news-item__summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            text-align: center;
            padding: 48px 20px;
            color: var(--text-muted);
            font-size: 15px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        @media (max-width: 640px) {
            .news-item {
                flex-direction: column;
                gap: 10px;
                padding: 16px 18px;
            }
            .news-item__num {
                font-size: 22px;
                min-width: auto;
            }
            .news-item__content h3 {
                font-size: 15px;
            }
        }

        /* ===== 数据统计 ===== */
        .stats {
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }
        .stats__bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .stats .container {
            position: relative;
            z-index: 1;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stat-item {
            padding: 24px 12px;
        }
        .stat-item__num {
            font-size: 40px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-item__label {
            font-size: 15px;
            color: var(--text-inverse-muted);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item__num {
                font-size: 32px;
            }
        }
        @media (max-width: 460px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-item__num {
                font-size: 28px;
            }
            .stat-item__label {
                font-size: 13px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(240, 185, 11, 0.2);
        }
        .faq-item__q {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            transition: var(--transition);
            user-select: none;
        }
        .faq-item__q:hover {
            color: var(--accent);
        }
        .faq-item__q .icon {
            font-size: 20px;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-item__q .icon {
            transform: rotate(45deg);
            color: var(--accent);
        }
        .faq-item__a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.active .faq-item__a {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        @media (max-width: 640px) {
            .faq-item__q {
                padding: 14px 18px;
                font-size: 15px;
            }
            .faq-item__a {
                padding: 0 18px;
                font-size: 13px;
            }
            .faq-item.active .faq-item__a {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta {
            background: var(--bg-white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .cta__inner {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta__inner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta__inner>* {
            position: relative;
            z-index: 1;
        }
        .cta__inner h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-inverse);
            margin-bottom: 12px;
        }
        .cta__inner p {
            font-size: 16px;
            color: var(--text-inverse-muted);
            max-width: 520px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .cta__inner .btn-primary {
            padding: 14px 40px;
            border-radius: 30px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 16px;
            transition: var(--transition);
            box-shadow: var(--shadow-accent);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .cta__inner .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(240, 185, 11, 0.45);
        }
        @media (max-width: 640px) {
            .cta__inner {
                padding: 36px 24px;
                border-radius: var(--radius-md);
            }
            .cta__inner h2 {
                font-size: 24px;
            }
            .cta__inner p {
                font-size: 15px;
            }
            .cta__inner .btn-primary {
                padding: 12px 30px;
                font-size: 15px;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary-dark);
            color: var(--text-inverse-muted);
            padding: 48px 0 28px;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer__brand .header__logo {
            color: var(--text-inverse);
            margin-bottom: 12px;
        }
        .footer__brand .header__logo .logo-icon {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .footer__brand p {
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer__col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-inverse);
            margin-bottom: 16px;
        }
        .footer__col ul li {
            margin-bottom: 10px;
        }
        .footer__col ul li a {
            font-size: 14px;
            color: var(--text-inverse-muted);
            transition: var(--transition);
        }
        .footer__col ul li a:hover {
            color: var(--accent);
        }
        .footer__bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            font-size: 13px;
            gap: 12px;
        }
        .footer__bottom span {
            opacity: 0.7;
        }
        .footer__bottom a {
            color: var(--accent);
            opacity: 0.8;
        }
        .footer__bottom a:hover {
            opacity: 1;
        }
        @media (max-width: 768px) {
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 520px) {
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 通用工具 ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-8 {
            margin-bottom: 8px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 480px) {
            .header__logo {
                font-size: 18px;
            }
            .header__logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 16px;
            }
            .hero__title {
                font-size: 24px;
            }
            .hero__desc {
                font-size: 15px;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a4a;
            --accent: #e94e1b;
            --accent-light: #f06a3e;
            --accent-dark: #c43d12;
            --bg-body: #f5f7fb;
            --bg-card: #ffffff;
            --bg-dark: #0d1117;
            --bg-section-alt: #eef1f7;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8888a0;
            --text-light: #f0f2f8;
            --border: #e0e4ee;
            --border-light: #f0f2f8;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26, 42, 108, 0.06);
            --shadow: 0 6px 24px rgba(26, 42, 108, 0.08);
            --shadow-lg: 0 16px 48px rgba(26, 42, 108, 0.12);
            --shadow-accent: 0 6px 24px rgba(233, 78, 27, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1200px;
            --header-height: 80px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: var(--transition);
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 顶部信息条 ===== */
        .topbar {
            background: var(--primary-dark);
            color: var(--text-light);
            font-size: 13px;
            padding: 6px 0;
            letter-spacing: 0.3px;
        }
        .topbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px 16px;
        }
        .topbar__info {
            display: flex;
            align-items: center;
            gap: 8px;
            opacity: 0.85;
        }
        .topbar__info i {
            font-size: 12px;
            color: var(--accent);
        }
        .topbar__cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .topbar__cta a {
            color: var(--text-light);
            font-weight: 500;
            padding: 2px 12px;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.08);
            font-size: 12px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .topbar__cta a:hover {
            background: var(--accent);
            color: #fff;
        }

        /* ===== Header / Nav ===== */
        .header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .header__logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .header__logo .logo-icon {
            font-size: 28px;
            color: var(--accent);
        }
        .header__logo:hover {
            color: var(--primary);
        }
        .header__nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header__nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            color: var(--text-secondary);
            position: relative;
            transition: var(--transition);
        }
        .header__nav a:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.05);
        }
        .header__nav a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 2px 12px rgba(26, 42, 108, 0.2);
        }
        .header__actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header__search {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border-radius: 24px;
            padding: 4px 4px 4px 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .header__search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 42, 108, 0.1);
        }
        .header__search input {
            background: transparent;
            border: none;
            padding: 6px 0;
            font-size: 14px;
            color: var(--text-primary);
            width: 140px;
        }
        .header__search input::placeholder {
            color: var(--text-muted);
        }
        .header__search button {
            background: var(--primary);
            color: #fff;
            border: none;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: var(--transition);
        }
        .header__search button:hover {
            background: var(--accent);
            transform: scale(1.05);
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 26px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .menu-toggle:hover {
            background: var(--bg-body);
        }

        /* ===== 文章页专用样式 ===== */
        .article-page {
            padding: 40px 0 60px;
        }
        .article-page .container {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 40px;
        }
        .article__main {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px 44px;
            overflow: hidden;
        }
        .article__header {
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 2px solid var(--border-light);
        }
        .article__breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .article__breadcrumb a {
            color: var(--text-muted);
        }
        .article__breadcrumb a:hover {
            color: var(--accent);
        }
        .article__breadcrumb .sep {
            color: var(--text-muted);
            font-size: 12px;
        }
        .article__category {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 16px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .article__title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .article__meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .article__meta i {
            margin-right: 6px;
            color: var(--primary-light);
        }
        .article__featured-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 28px;
            box-shadow: var(--shadow-sm);
        }
        .article__featured-img img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .article__content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-secondary);
        }
        .article__content p {
            margin-bottom: 20px;
        }
        .article__content h2,
        .article__content h3 {
            margin-top: 32px;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .article__content h2 {
            font-size: 24px;
            border-left: 4px solid var(--accent);
            padding-left: 16px;
        }
        .article__content h3 {
            font-size: 20px;
        }
        .article__content ul,
        .article__content ol {
            margin: 16px 0 20px 24px;
        }
        .article__content li {
            margin-bottom: 8px;
            list-style: disc;
        }
        .article__content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article__content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-section-alt);
            padding: 16px 24px;
            margin: 20px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article__tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article__tags .tag {
            display: inline-block;
            background: var(--bg-section-alt);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 18px;
            border-radius: 20px;
            transition: var(--transition);
        }
        .article__tags .tag:hover {
            background: var(--primary);
            color: #fff;
        }
        .article__nav-links {
            display: flex;
            justify-content: space-between;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            gap: 16px;
            flex-wrap: wrap;
        }
        .article__nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: var(--primary);
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            background: var(--bg-section-alt);
            transition: var(--transition);
            font-size: 14px;
        }
        .article__nav-links a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateX(4px);
        }
        .article__nav-links a:last-child:hover {
            transform: translateX(-4px);
        }

        /* ===== 侧边栏 ===== */
        .article__sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar__card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
        }
        .sidebar__card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar__card h3 i {
            color: var(--accent);
        }
        .sidebar__list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar__list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar__list li:last-child {
            border-bottom: none;
        }
        .sidebar__list a {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            font-size: 14px;
            line-height: 1.5;
            color: var(--text-secondary);
        }
        .sidebar__list a:hover {
            color: var(--accent);
        }
        .sidebar__list .thumb {
            width: 60px;
            height: 60px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-section-alt);
        }
        .sidebar__list .info {
            flex: 1;
        }
        .sidebar__list .info .title {
            font-weight: 600;
            color: var(--text-primary);
            display: block;
            margin-bottom: 4px;
        }
        .sidebar__list .info .date {
            font-size: 12px;
            color: var(--text-muted);
        }
        .sidebar__tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar__tags a {
            display: inline-block;
            background: var(--bg-section-alt);
            color: var(--text-secondary);
            font-size: 13px;
            padding: 6px 16px;
            border-radius: 20px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .sidebar__tags a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .sidebar__cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 28px 24px;
            border-radius: var(--radius);
            text-align: center;
        }
        .sidebar__cta h4 {
            color: #fff;
            font-size: 20px;
            margin-bottom: 12px;
        }
        .sidebar__cta p {
            font-size: 14px;
            opacity: 0.85;
            margin-bottom: 18px;
        }
        .sidebar__cta .btn {
            background: var(--accent);
            color: #fff;
            padding: 12px 32px;
            border-radius: 30px;
            font-weight: 700;
            display: inline-block;
            transition: var(--transition);
        }
        .sidebar__cta .btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-accent);
        }

        /* ===== 文章缺失状态 ===== */
        .article__not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .article__not-found i {
            font-size: 64px;
            color: var(--text-muted);
            margin-bottom: 24px;
            display: block;
        }
        .article__not-found h2 {
            font-size: 28px;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .article__not-found p {
            color: var(--text-secondary);
            font-size: 16px;
            margin-bottom: 24px;
        }
        .article__not-found .btn {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 12px 36px;
            border-radius: 30px;
            font-weight: 700;
            transition: var(--transition);
        }
        .article__not-found .btn:hover {
            background: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-accent);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
            margin-top: 20px;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer__brand .header__logo {
            color: #fff;
            font-size: 22px;
            margin-bottom: 12px;
        }
        .footer__brand .header__logo .logo-icon {
            font-size: 24px;
        }
        .footer__brand p {
            font-size: 14px;
            line-height: 1.7;
            opacity: 0.7;
            max-width: 360px;
        }
        .footer__col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer__col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--accent);
        }
        .footer__col ul li {
            margin-bottom: 10px;
        }
        .footer__col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer__col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer__bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            font-size: 13px;
            opacity: 0.6;
        }
        .footer__bottom a {
            color: rgba(255, 255, 255, 0.7);
        }
        .footer__bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-page .container {
                grid-template-columns: 1fr;
            }
            .article__sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .topbar__info span {
                display: none;
            }
            .header__nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-card);
                flex-direction: column;
                padding: 16px 24px;
                box-shadow: var(--shadow-lg);
                border-top: 1px solid var(--border);
                border-radius: 0 0 var(--radius) var(--radius);
                gap: 4px;
            }
            .header__nav.open {
                display: flex;
            }
            .header__nav a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .header__search input {
                width: 100px;
            }
            .menu-toggle {
                display: block;
            }
            .article__main {
                padding: 24px 20px;
            }
            .article__title {
                font-size: 24px;
            }
            .article__sidebar {
                grid-template-columns: 1fr;
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }
            .article__nav-links a {
                font-size: 13px;
                padding: 8px 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .header__logo {
                font-size: 18px;
            }
            .header__logo .logo-icon {
                font-size: 20px;
            }
            .header__search input {
                width: 80px;
                font-size: 12px;
            }
            .header__search button {
                width: 28px;
                height: 28px;
                font-size: 12px;
            }
            .article__title {
                font-size: 20px;
            }
            .article__meta {
                font-size: 12px;
                gap: 8px 16px;
            }
            .article__content {
                font-size: 15px;
            }
            .article__content h2 {
                font-size: 20px;
            }
            .article__content h3 {
                font-size: 18px;
            }
            .sidebar__card {
                padding: 20px 16px;
            }
            .footer {
                padding: 40px 0 20px;
            }
            .topbar {
                font-size: 11px;
            }
            .topbar__cta a {
                font-size: 10px;
                padding: 1px 10px;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a4a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-section-alt: #f1f5f9;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f8fafc;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-hover: 0 12px 36px rgba(26, 42, 108, 0.13);
            --transition: 0.30s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --header-h: 72px;
            --topbar-h: 40px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--primary-dark);
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2.2rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
        }
        p {
            color: var(--text-light);
            margin-bottom: 0.8rem;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Top Bar ===== */
        .topbar {
            background: var(--primary-dark);
            color: var(--text-white);
            font-size: 0.82rem;
            height: var(--topbar-h);
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .topbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .topbar__left {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.7);
        }
        .topbar__left i {
            font-size: 0.7rem;
            color: var(--accent);
        }
        .topbar__left span {
            color: var(--text-white);
            font-weight: 500;
        }
        .topbar__right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .topbar__right a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.78rem;
            transition: color var(--transition);
        }
        .topbar__right a:hover {
            color: var(--accent-light);
        }
        .topbar__right .topbar__cta {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 16px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.78rem;
            transition: background var(--transition);
        }
        .topbar__right .topbar__cta:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
        }

        /* ===== Header / Nav ===== */
        .header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            height: var(--header-h);
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
        }
        .header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .header__logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .header__logo .logo-icon {
            font-size: 1.6rem;
            line-height: 1;
        }
        .header__logo:hover {
            color: var(--primary);
            opacity: 0.92;
        }
        .header__nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header__nav a {
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .header__nav a:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.05);
        }
        .header__nav a.active {
            color: var(--bg-card);
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(26, 42, 108, 0.25);
        }
        .header__nav a.active:hover {
            background: var(--primary-light);
            color: var(--bg-card);
        }
        .header__toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--primary);
            padding: 6px 10px;
            border-radius: var(--radius-xs);
            background: var(--bg-section-alt);
            transition: background var(--transition);
        }
        .header__toggle:hover {
            background: var(--border);
        }

        /* ===== Mobile Nav ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: calc(var(--topbar-h) + var(--header-h));
            left: 0;
            right: 0;
            background: var(--bg-card);
            border-bottom: 2px solid var(--border);
            box-shadow: var(--shadow-lg);
            z-index: 99;
            padding: 12px 20px;
            flex-direction: column;
            gap: 6px;
            max-height: 70vh;
            overflow-y: auto;
            opacity: 0;
            transform: translateY(-12px);
            transition: opacity 0.3s ease, transform 0.3s ease;
            pointer-events: none;
        }
        .mobile-nav.open {
            display: flex;
            opacity: 1;
            transform: translateY(0);
            pointer-events: all;
        }
        .mobile-nav a {
            display: block;
            padding: 12px 18px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
        }
        .mobile-nav a:hover {
            background: var(--bg-section-alt);
            color: var(--primary);
        }
        .mobile-nav a.active {
            background: var(--primary);
            color: var(--bg-card);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 72px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            color: var(--text-white);
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .page-banner p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.15rem;
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-bottom: 20px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--accent-light);
        }
        .page-banner .breadcrumb span {
            color: var(--accent);
        }

        /* ===== Section通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section--alt {
            background: var(--bg-section-alt);
        }
        .section__title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section__title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }
        .section__title p {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 560px;
            margin: 0 auto;
        }
        .section__title .badge {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 18px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        /* ===== 平台简介 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-grid__image img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }
        .intro-grid__content h3 {
            font-size: 1.6rem;
            margin-bottom: 16px;
            color: var(--primary-dark);
        }
        .intro-grid__content p {
            font-size: 1rem;
            line-height: 1.8;
            color: var(--text-light);
        }
        .intro-grid__content .intro-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        .intro-grid__content .intro-tags span {
            background: var(--bg-section-alt);
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary);
            border: 1px solid var(--border);
        }

        /* ===== 核心功能卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .feature-card__icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.5rem;
            color: var(--bg-card);
        }
        .feature-card h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: var(--primary-dark);
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-bottom: 0;
            line-height: 1.7;
        }
        .feature-card .feature-tag {
            display: inline-block;
            margin-top: 14px;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 2px 14px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        /* ===== 使用步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 20px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            text-align: center;
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-card::before {
            counter-increment: step;
            content: '0' counter(step);
            position: absolute;
            top: 14px;
            left: 20px;
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--border);
            line-height: 1;
            opacity: 0.5;
        }
        .step-card__icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 14px;
            position: relative;
        }
        .step-card h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            color: var(--primary-dark);
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .step-card .step-badge {
            display: inline-block;
            margin-top: 12px;
            background: var(--bg-section-alt);
            color: var(--primary);
            padding: 2px 16px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 500;
            border: 1px solid var(--border);
        }

        /* ===== 热门榜单 / 推荐资源 ===== */
        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 720px;
            margin: 0 auto;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 14px 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .rank-item:hover {
            transform: translateX(6px);
            border-color: var(--primary-light);
            box-shadow: var(--shadow-hover);
        }
        .rank-item__num {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--primary);
            min-width: 36px;
            text-align: center;
        }
        .rank-item__num.top {
            color: var(--accent);
        }
        .rank-item__content {
            flex: 1;
        }
        .rank-item__content h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 2px;
        }
        .rank-item__content p {
            font-size: 0.84rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .rank-item__tag {
            background: var(--bg-section-alt);
            padding: 4px 14px;
            border-radius: 14px;
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--primary);
            border: 1px solid var(--border);
            white-space: nowrap;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .faq-item__question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary-dark);
            cursor: pointer;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-item__question:hover {
            background: var(--bg-section-alt);
        }
        .faq-item__question i {
            font-size: 0.85rem;
            color: var(--primary-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-item__question i {
            transform: rotate(180deg);
        }
        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.active .faq-item__answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 64px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            max-width: 540px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-section .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 14px 40px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .cta-section .btn-primary:hover {
            background: var(--accent-light);
            transform: scale(1.04);
            box-shadow: 0 8px 30px rgba(245, 158, 11, 0.35);
        }
        .cta-section .btn-outline {
            background: transparent;
            color: var(--text-white);
            padding: 14px 36px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .cta-section .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(255, 255, 255, 0.05);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 28px;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer__brand .header__logo {
            color: var(--text-white);
            font-size: 1.3rem;
            margin-bottom: 12px;
            display: inline-flex;
        }
        .footer__brand .header__logo .logo-icon {
            font-size: 1.5rem;
        }
        .footer__brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer__col h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .footer__col ul li {
            margin-bottom: 8px;
        }
        .footer__col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer__col ul li a:hover {
            color: var(--accent-light);
        }
        .footer__bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer__bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer__bottom a:hover {
            color: var(--accent-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .intro-grid {
                gap: 32px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
                --topbar-h: 36px;
            }
            .topbar__left span {
                display: none;
            }
            .topbar__right a:not(.topbar__cta) {
                display: none;
            }
            .header__nav {
                display: none;
            }
            .header__toggle {
                display: block;
            }
            .page-banner {
                padding: 56px 0 48px;
                min-height: auto;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
            .section {
                padding: 48px 0;
            }
            .section__title {
                margin-bottom: 32px;
            }
            .section__title h2 {
                font-size: 1.5rem;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .intro-grid__image {
                order: -1;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 18px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .step-card {
                padding: 24px 16px 20px;
            }
            .step-card::before {
                font-size: 1.6rem;
                top: 10px;
                left: 14px;
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .rank-item {
                flex-wrap: wrap;
                padding: 12px 16px;
            }
            .rank-item__tag {
                margin-left: auto;
            }
            .faq-item__question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-item__answer {
                padding: 0 16px;
                font-size: 0.88rem;
            }
            .faq-item.active .faq-item__answer {
                padding: 0 16px 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .feature-card__icon {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }
            .intro-grid__content h3 {
                font-size: 1.25rem;
            }
            .rank-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .rank-item__tag {
                margin-left: 0;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            justify-content: center;
            align-items: center;
        }