/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0f1724;
            --color-primary-light: #1a2744;
            --color-accent: #c9a84c;
            --color-accent-hover: #dbbd5e;
            --color-accent-dark: #b8942e;
            --color-bg: #ffffff;
            --color-bg-alt: #f1f5f9;
            --color-bg-dark: #0a0f1a;
            --color-text: #1e293b;
            --color-text-light: #64748b;
            --color-text-inverse: #f8fafc;
            --color-border: #e2e8f0;
            --color-border-light: #f0f2f5;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.16);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== 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: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-accent-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 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;
            font-weight: 700;
            color: var(--color-primary);
        }
        h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.15rem, 2vw, 1.5rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 0.8rem;
            color: var(--color-text-light);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
        }
        .btn-primary:hover {
            background: var(--color-accent-hover);
            border-color: var(--color-accent-hover);
            color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(201, 168, 76, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(201, 168, 76, 0.25);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-text-inverse);
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--color-text-inverse);
            color: var(--color-text-inverse);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-white {
            background: var(--color-bg);
            color: var(--color-primary);
            border-color: var(--color-bg);
        }
        .btn-white:hover {
            background: var(--color-bg-alt);
            border-color: var(--color-bg-alt);
            color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }
        .btn-lg {
            padding: 16px 44px;
            font-size: 1.05rem;
            border-radius: var(--radius-lg);
        }
        .btn:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(201, 168, 76, 0.12);
            color: var(--color-accent-dark);
            border: 1px solid rgba(201, 168, 76, 0.2);
        }
        .badge-primary {
            background: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
        }
        .badge-light {
            background: rgba(255, 255, 255, 0.15);
            color: var(--color-text-inverse);
            border-color: rgba(255, 255, 255, 0.2);
        }
        .badge-success {
            background: rgba(16, 185, 129, 0.12);
            color: #065f46;
            border-color: rgba(16, 185, 129, 0.2);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(15, 23, 36, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 1000;
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-text-inverse);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }
        .logo i {
            color: var(--color-accent);
            font-size: 1.5rem;
        }
        .logo:hover {
            color: var(--color-accent-hover);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.7);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a i {
            font-size: 0.85rem;
            opacity: 0.6;
        }
        .nav-list a:hover {
            color: var(--color-text-inverse);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-list a.active {
            color: var(--color-accent);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }
        .nav-list a.active i {
            opacity: 1;
            color: var(--color-accent);
        }
        .nav-toggle {
            display: none;
            color: var(--color-text-inverse);
            font-size: 1.5rem;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-list {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                background: rgba(15, 23, 36, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 20px 24px;
                gap: 4px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                transform: translateY(-100%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s ease;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                padding: 12px 16px;
                font-size: 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-list a.active {
                background: rgba(201, 168, 76, 0.1);
            }
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: var(--color-bg-dark);
            position: relative;
            overflow: hidden;
            padding: calc(var(--nav-height) + 40px) 0 80px;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            mix-blend-mode: luminosity;
            filter: saturate(0.6);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(15, 23, 36, 0.6) 0%, rgba(10, 15, 26, 0.92) 70%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            border-radius: 100px;
            background: rgba(201, 168, 76, 0.15);
            border: 1px solid rgba(201, 168, 76, 0.25);
            color: var(--color-accent);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            color: var(--color-text-inverse);
            max-width: 800px;
            margin: 0 auto 20px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .hero h1 span {
            color: var(--color-accent);
        }
        .hero-sub {
            font-size: clamp(1rem, 1.8vw, 1.2rem);
            color: rgba(255, 255, 255, 0.65);
            max-width: 620px;
            margin: 0 auto 40px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 60px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
            color: var(--color-text-inverse);
        }
        .hero-stat .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 90vh;
                padding: calc(var(--nav-height) + 24px) 0 50px;
            }
            .hero-stats {
                gap: 24px;
                margin-top: 40px;
            }
            .hero-stat .num {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--color-bg-alt);
        }
        .section-dark {
            background: var(--color-bg-dark);
            color: var(--color-text-inverse);
        }
        .section-dark h2,
        .section-dark h3 {
            color: var(--color-text-inverse);
        }
        .section-dark p {
            color: rgba(255, 255, 255, 0.6);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header .badge {
            margin-bottom: 16px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            max-width: 560px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .section-header .subtitle {
            color: var(--color-text-light);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-dark .section-header .subtitle {
            color: rgba(255, 255, 255, 0.5);
        }
        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--color-accent);
        }
        .card-image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: var(--color-bg-alt);
        }
        .card-body {
            padding: 24px;
        }
        .card-body .badge {
            margin-bottom: 10px;
        }
        .card-body h3 {
            margin-bottom: 8px;
        }
        .card-body h3 a {
            color: var(--color-primary);
        }
        .card-body h3 a:hover {
            color: var(--color-accent);
        }
        .card-body p {
            font-size: 0.92rem;
            margin-bottom: 16px;
        }
        .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid var(--color-border-light);
            font-size: 0.85rem;
            color: var(--color-text-light);
        }
        .card-footer .date {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .card-footer .date i {
            font-size: 0.75rem;
        }
        .card-link {
            color: var(--color-accent-dark);
            font-weight: 600;
            font-size: 0.88rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-link:hover {
            gap: 10px;
        }

        /* ===== 网格 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }
        @media (max-width: 520px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== 特性 / 图标矩阵 ===== */
        .feature-card {
            text-align: center;
            padding: 32px 20px;
            border-radius: var(--radius-lg);
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--color-accent);
        }
        .feature-card .icon-wrap {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            border-radius: var(--radius-md);
            background: rgba(201, 168, 76, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--color-accent);
            transition: all var(--transition);
        }
        .feature-card:hover .icon-wrap {
            background: var(--color-accent);
            color: var(--color-primary);
        }
        .feature-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.9rem;
            margin-bottom: 0;
        }

        /* ===== 分类入口卡片 ===== */
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--color-bg-dark);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            aspect-ratio: 4 / 3;
            display: flex;
            align-items: flex-end;
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.55;
            transition: all 0.5s ease;
        }
        .category-card:hover img {
            opacity: 0.35;
            transform: scale(1.05);
        }
        .category-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(15, 23, 36, 0.85) 0%, rgba(15, 23, 36, 0.1) 70%);
        }
        .category-card .content {
            position: relative;
            z-index: 2;
            padding: 28px 24px;
            width: 100%;
        }
        .category-card .content h3 {
            color: var(--color-text-inverse);
            font-size: 1.25rem;
            margin-bottom: 6px;
        }
        .category-card .content p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            margin-bottom: 12px;
        }
        .category-card .content .btn {
            padding: 6px 18px;
            font-size: 0.82rem;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-accent);
        }

        /* ===== 数据 / 统计 ===== */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .data-card {
            text-align: center;
            padding: 28px 16px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition);
        }
        .data-card:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
            border-color: rgba(201, 168, 76, 0.3);
        }
        .data-card .num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
        }
        .data-card .num span {
            font-size: 1.4rem;
            font-weight: 600;
            opacity: 0.8;
        }
        .data-card .label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 8px;
        }
        @media (max-width: 768px) {
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .data-card .num {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
        }

        /* ===== 流程 / 时间线 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .steps::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: rgba(201, 168, 76, 0.2);
            z-index: 0;
        }
        .step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .step .step-num {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: var(--color-accent);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 800;
            border: 4px solid var(--color-bg-dark);
            box-shadow: 0 0 0 2px rgba(201, 168, 76, 0.3);
        }
        .step h4 {
            color: var(--color-text-inverse);
            margin-bottom: 6px;
        }
        .step p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 16px;
            }
            .steps::before {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .steps {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--color-border);
            padding: 20px 0;
        }
        .section-dark .faq-item {
            border-color: rgba(255, 255, 255, 0.08);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--color-primary);
            cursor: pointer;
            padding: 4px 0;
            transition: color var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .section-dark .faq-question {
            color: var(--color-text-inverse);
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question i {
            font-size: 0.9rem;
            color: var(--color-accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px 0 0;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-top: 14px;
        }
        .faq-answer p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            margin-bottom: 0;
        }
        .section-dark .faq-answer p {
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-bg-dark);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }
        .cta-section .cta-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: luminosity;
            filter: saturate(0.4);
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            color: var(--color-text-inverse);
            max-width: 600px;
            margin: 0 auto 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.6);
            max-width: 520px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-section .btn {
            font-size: 1.05rem;
            padding: 16px 48px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.6);
            padding: 56px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .site-footer .grid-4 {
            gap: 32px;
        }
        .site-footer h4 {
            color: var(--color-text-inverse);
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .site-footer p,
        .site-footer a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            line-height: 2;
        }
        .site-footer a:hover {
            color: var(--color-accent);
        }
        .site-footer .logo {
            margin-bottom: 12px;
            font-size: 1.2rem;
        }
        .site-footer .social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .site-footer .social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.5);
            font-size: 1rem;
            transition: all var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-footer .social a:hover {
            background: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
            transform: translateY(-2px);
        }
        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
            font-size: 0.85rem;
        }
        .site-footer .footer-bottom a:hover {
            color: var(--color-accent);
        }
        @media (max-width: 768px) {
            .site-footer .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .site-footer .grid-4 {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 文章列表（CMS） ===== */
        .post-list .card {
            display: flex;
            flex-direction: column;
        }
        .post-list .card-image {
            aspect-ratio: 16 / 9;
        }
        .post-empty {
            text-align: center;
            padding: 48px 24px;
            color: var(--color-text-light);
            background: var(--color-bg-alt);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--color-border);
        }
        .post-empty i {
            font-size: 2.4rem;
            color: var(--color-border);
            margin-bottom: 16px;
            display: block;
        }
        .section-dark .post-empty {
            background: rgba(255, 255, 255, 0.04);
            border-color: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.4);
        }
        .section-dark .post-empty i {
            color: rgba(255, 255, 255, 0.1);
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mt-48 {
            margin-top: 48px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        @media (max-width: 520px) {
            .hide-mobile {
                display: none !important;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a3a;
            --primary-light: #2c4056;
            --primary-dark: #0f1a26;
            --accent: #d4a843;
            --accent-light: #e8c56e;
            --accent-dark: #b8912e;
            --bg: #f5f6f8;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f1a26;
            --text: #1a1a2e;
            --text-light: #5a6a7a;
            --text-white: #f0f2f5;
            --border: #e2e6ec;
            --border-light: #f0f2f5;
            --shadow: 0 4px 20px rgba(26, 42, 58, 0.08);
            --shadow-hover: 0 12px 40px rgba(26, 42, 58, 0.14);
            --radius: 12px;
            --radius-sm: 6px;
            --radius-lg: 20px;
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 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);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 2px;
        }

        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;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
        }

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

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo i {
            color: var(--accent);
            font-size: 26px;
        }
        .logo:hover {
            color: var(--primary);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a i {
            font-size: 16px;
            color: var(--text-light);
            transition: color var(--transition);
        }
        .nav-list a:hover {
            color: var(--primary);
            background: rgba(26, 42, 58, 0.04);
        }
        .nav-list a:hover i {
            color: var(--primary);
        }
        .nav-list a.active {
            color: var(--primary);
            background: rgba(212, 168, 67, 0.10);
        }
        .nav-list a.active i {
            color: var(--accent);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--primary);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(26, 42, 58, 0.06);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Hero / 横幅 ===== */
        .hero {
            position: relative;
            min-height: 360px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 24px 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(212, 168, 67, 0.08) 0%, transparent 60%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero h1 {
            font-size: 48px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 2px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .hero h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .hero p {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .hero-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.20);
            border-radius: 50px;
            padding: 4px 4px 4px 20px;
            max-width: 480px;
            width: 100%;
            backdrop-filter: blur(8px);
        }
        .hero-search input {
            flex: 1;
            background: transparent;
            color: var(--text-white);
            padding: 12px 8px;
            font-size: 16px;
            min-width: 0;
        }
        .hero-search input::placeholder {
            color: rgba(255, 255, 255, 0.55);
        }
        .hero-search button {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .hero-search button:hover {
            background: var(--accent-light);
            transform: scale(1.02);
        }
        .hero-search button:active {
            transform: scale(0.97);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-header h2 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .section-header p {
            font-size: 18px;
            color: var(--text-light);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-header .divider {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 2px;
            margin: 16px auto 0;
        }

        .section.bg-white {
            background: var(--bg-white);
        }
        .section.bg-light {
            background: var(--bg);
        }
        .section.bg-dark {
            background: var(--bg-dark);
        }
        .section.bg-dark .section-header h2 {
            color: var(--text-white);
        }
        .section.bg-dark .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 标签云 ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 8px;
        }
        .tag-cloud .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 22px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
            cursor: pointer;
        }
        .tag-cloud .tag i {
            color: var(--accent);
            font-size: 14px;
        }
        .tag-cloud .tag:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26, 42, 58, 0.15);
        }
        .tag-cloud .tag:hover i {
            color: var(--accent-light);
        }
        .tag-cloud .tag.active {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
            font-weight: 600;
        }
        .tag-cloud .tag.active i {
            color: var(--primary-dark);
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border);
        }
        .card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img {
            transform: scale(1.03);
        }
        .card .card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 10px;
        }
        .card .card-tags span {
            display: inline-block;
            padding: 2px 12px;
            font-size: 12px;
            font-weight: 500;
            border-radius: 50px;
            background: rgba(212, 168, 67, 0.10);
            color: var(--accent-dark);
        }
        .card .card-tags span.hard {
            background: rgba(220, 80, 80, 0.10);
            color: #c0392b;
        }
        .card .card-tags span.easy {
            background: rgba(46, 204, 113, 0.10);
            color: #27ae60;
        }
        .card .card-tags span.medium {
            background: rgba(212, 168, 67, 0.10);
            color: var(--accent-dark);
        }
        .card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
            line-height: 1.4;
        }
        .card h3 a {
            color: var(--text);
        }
        .card h3 a:hover {
            color: var(--accent-dark);
        }
        .card .card-excerpt {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }
        .card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: auto;
        }
        .card .card-meta i {
            margin-right: 4px;
            color: var(--accent);
        }
        .card .card-meta .views {
            margin-left: auto;
        }

        /* ===== 统计数据 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-item {
            text-align: center;
            padding: 36px 20px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
        }
        .stat-item .stat-icon {
            font-size: 36px;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .stat-item .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 1px;
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 6px;
        }

        /* ===== 文章列表 ===== */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .article-item {
            display: flex;
            gap: 24px;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            align-items: flex-start;
        }
        .article-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: var(--border);
        }
        .article-item .article-img {
            width: 200px;
            min-height: 130px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }
        .article-item .article-content {
            flex: 1;
            min-width: 0;
        }
        .article-item .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 6px;
        }
        .article-item .article-tags span {
            padding: 2px 12px;
            font-size: 12px;
            font-weight: 500;
            border-radius: 50px;
            background: rgba(212, 168, 67, 0.10);
            color: var(--accent-dark);
        }
        .article-item h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .article-item h3 a {
            color: var(--text);
        }
        .article-item h3 a:hover {
            color: var(--accent-dark);
        }
        .article-item .article-excerpt {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-item .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            margin-top: 10px;
        }
        .article-item .article-meta i {
            margin-right: 4px;
            color: var(--accent);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-item .faq-question:hover {
            background: rgba(212, 168, 67, 0.04);
        }
        .faq-item .faq-question i {
            color: var(--accent);
            font-size: 14px;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px;
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }
        .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;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 540px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 168, 67, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255, 255, 255, 0.30);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 168, 67, 0.15);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 0;
        }
        .site-footer .grid-4 {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
        }
        .site-footer .logo {
            color: var(--text-white);
            font-size: 20px;
        }
        .site-footer .logo i {
            color: var(--accent);
        }
        .site-footer h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .site-footer a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 15px;
            line-height: 2.2;
            transition: color var(--transition);
        }
        .site-footer a:hover {
            color: var(--accent);
        }
        .site-footer .social {
            display: flex;
            gap: 14px;
            margin-top: 18px;
        }
        .site-footer .social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            font-size: 18px;
            color: rgba(255, 255, 255, 0.6);
            transition: all var(--transition);
        }
        .site-footer .social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }
        .site-footer p {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
        }
        .site-footer p i {
            color: var(--accent);
        }
        .footer-bottom {
            margin-top: 48px;
            padding: 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
            font-size: 14px;
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .site-footer .grid-4 {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .hero h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
                pointer-events: none;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                padding: 12px 16px;
                font-size: 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-list a.active {
                background: rgba(212, 168, 67, 0.10);
                border-left: 3px solid var(--accent);
            }
            .nav-toggle {
                display: block;
            }

            .hero {
                min-height: 300px;
                padding: 60px 20px 48px;
            }
            .hero h1 {
                font-size: 30px;
            }
            .hero p {
                font-size: 17px;
            }
            .hero-search {
                flex-direction: column;
                background: transparent;
                border: none;
                padding: 0;
                gap: 12px;
            }
            .hero-search input {
                background: rgba(255, 255, 255, 0.12);
                border: 1px solid rgba(255, 255, 255, 0.20);
                border-radius: 50px;
                padding: 12px 20px;
                width: 100%;
            }
            .hero-search button {
                width: 100%;
                text-align: center;
            }

            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .section-header p {
                font-size: 16px;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card .card-img {
                height: 180px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 32px;
            }

            .article-item {
                flex-direction: column;
                padding: 18px;
            }
            .article-item .article-img {
                width: 100%;
                height: 180px;
            }

            .site-footer .grid-4 {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }

            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }

            .tag-cloud {
                gap: 8px;
            }
            .tag-cloud .tag {
                padding: 6px 16px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 26px;
            }
            .hero p {
                font-size: 15px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 24px 12px;
            }
            .stat-item .stat-number {
                font-size: 28px;
            }
            .stat-item .stat-icon {
                font-size: 28px;
            }
            .card .card-body {
                padding: 18px 18px 20px;
            }
            .faq-item .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-item .faq-answer {
                padding: 0 18px 16px;
                font-size: 14px;
            }
            .site-footer {
                padding: 40px 0 0;
            }
            .container {
                padding: 0 16px;
            }
            .logo {
                font-size: 18px;
            }
            .logo i {
                font-size: 22px;
            }
        }

        /* ===== 辅助类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-8 {
            margin-bottom: 8px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* 滚动条美化 */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary);
        }

        /* 选中颜色 */
        ::selection {
            background: var(--accent);
            color: var(--primary-dark);
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --primary: #e74c3c;
        --primary-dark: #c0392b;
        --primary-light: #fadbd8;
        --secondary: #2c3e50;
        --secondary-light: #34495e;
        --accent: #f39c12;
        --bg: #f8f9fa;
        --bg-card: #ffffff;
        --bg-dark: #1a1a2e;
        --bg-dark-alt: #16213e;
        --text: #2c3e50;
        --text-light: #7f8c8d;
        --text-white: #f1f1f1;
        --border: #e9ecef;
        --border-light: #f0f0f0;
        --radius: 16px;
        --radius-sm: 8px;
        --radius-lg: 24px;
        --shadow: 0 8px 32px rgba(0,0,0,0.08);
        --shadow-hover: 0 16px 48px rgba(0,0,0,0.14);
        --shadow-dark: 0 8px 32px rgba(0,0,0,0.3);
        --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
        --font: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
        --max-width: 1200px;
        --header-h: 72px;
    }

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

    /* ===== 按钮 ===== */
    .btn {
        display: inline-flex; align-items: center; gap: 10px;
        padding: 14px 32px; border-radius: 50px;
        font-weight: 600; font-size: 16px; line-height: 1;
        border: none; cursor: pointer;
        transition: var(--transition);
        background: var(--primary); color: #fff;
        box-shadow: 0 4px 16px rgba(231,76,60,0.3);
    }
    .btn:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(231,76,60,0.4); }
    .btn:active { transform: translateY(0); }
    .btn-outline {
        background: transparent; color: var(--primary);
        border: 2px solid var(--primary); box-shadow: none;
    }
    .btn-outline:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
    .btn-sm { padding: 10px 22px; font-size: 14px; }
    .btn-lg { padding: 18px 44px; font-size: 18px; }

    /* ===== 标签 / 徽章 ===== */
    .badge {
        display: inline-block; padding: 4px 16px; border-radius: 50px;
        font-size: 13px; font-weight: 600; line-height: 1.6;
        background: var(--primary-light); color: var(--primary-dark);
    }
    .badge-secondary { background: #e8eaf6; color: #3f51b5; }
    .badge-accent { background: #fef3e2; color: #e67e22; }
    .badge-dark { background: rgba(255,255,255,0.15); color: #fff; }

    /* ===== Header & Nav ===== */
    .site-header {
        position: fixed; top: 0; left: 0; width: 100%;
        height: var(--header-h); z-index: 1000;
        background: rgba(255,255,255,0.96);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
        transition: var(--transition);
    }
    .site-header .container {
        display: flex; align-items: center; justify-content: space-between;
        height: 100%;
    }
    .logo {
        display: flex; align-items: center; gap: 10px;
        font-size: 22px; font-weight: 800; color: var(--secondary);
        letter-spacing: -0.5px;
    }
    .logo i { color: var(--primary); font-size: 26px; }
    .logo:hover { color: var(--primary); }
    .nav-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--text); cursor: pointer; padding: 8px; }
    .nav-list { display: flex; align-items: center; gap: 6px; }
    .nav-list a {
        display: flex; align-items: center; gap: 6px;
        padding: 10px 20px; border-radius: 50px;
        font-size: 15px; font-weight: 500; color: var(--text-light);
        transition: var(--transition);
    }
    .nav-list a i { font-size: 16px; }
    .nav-list a:hover { color: var(--primary); background: var(--primary-light); }
    .nav-list a.active { color: #fff; background: var(--primary); box-shadow: 0 4px 14px rgba(231,76,60,0.3); }
    .nav-list a.active:hover { color: #fff; background: var(--primary-dark); }

    /* ===== Hero / Banner ===== */
    .article-hero {
        position: relative; margin-top: var(--header-h);
        padding: 100px 0 80px;
        background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-alt) 100%);
        overflow: hidden;
    }
    .article-hero::before {
        content: ''; position: absolute; inset: 0;
        background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        opacity: 0.2; mix-blend-mode: overlay;
    }
    .article-hero .container { position: relative; z-index: 2; }
    .article-hero .breadcrumb {
        display: flex; align-items: center; gap: 10px;
        font-size: 14px; color: rgba(255,255,255,0.6); margin-bottom: 24px;
    }
    .article-hero .breadcrumb a { color: rgba(255,255,255,0.7); }
    .article-hero .breadcrumb a:hover { color: #fff; }
    .article-hero .breadcrumb span { color: rgba(255,255,255,0.9); }
    .article-hero .badge { margin-bottom: 16px; }
    .article-hero h1 {
        font-size: 42px; font-weight: 800; color: #fff;
        max-width: 860px; line-height: 1.2; margin-bottom: 20px;
    }
    .article-hero .meta {
        display: flex; flex-wrap: wrap; gap: 24px;
        font-size: 15px; color: rgba(255,255,255,0.7); margin-top: 8px;
    }
    .article-hero .meta i { margin-right: 6px; color: var(--accent); }

    /* ===== 文章正文 ===== */
    .article-body {
        padding: 60px 0 40px;
        background: var(--bg);
    }
    .article-body .content-wrap {
        max-width: 820px; margin: 0 auto;
        background: var(--bg-card); border-radius: var(--radius);
        padding: 48px 56px; box-shadow: var(--shadow);
    }
    .article-body .content-wrap .post-content {
        font-size: 17px; line-height: 1.9; color: var(--text);
    }
    .article-body .content-wrap .post-content p { margin-bottom: 1.4em; }
    .article-body .content-wrap .post-content h2 { font-size: 26px; margin: 1.4em 0 0.6em; color: var(--secondary); }
    .article-body .content-wrap .post-content h3 { font-size: 22px; margin: 1.2em 0 0.5em; color: var(--secondary); }
    .article-body .content-wrap .post-content ul, 
    .article-body .content-wrap .post-content ol { margin-bottom: 1.4em; padding-left: 24px; }
    .article-body .content-wrap .post-content li { margin-bottom: 0.5em; list-style: disc; }
    .article-body .content-wrap .post-content img { border-radius: var(--radius-sm); margin: 24px 0; }
    .article-body .content-wrap .post-content blockquote {
        border-left: 4px solid var(--primary); padding: 16px 24px;
        margin: 24px 0; background: var(--primary-light); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        font-style: italic; color: var(--secondary);
    }
    .article-body .content-wrap .post-content a { color: var(--primary); text-decoration: underline; }
    .article-body .content-wrap .post-tags {
        display: flex; flex-wrap: wrap; gap: 10px; margin-top: 40px; padding-top: 24px;
        border-top: 1px solid var(--border);
    }
    .article-body .content-wrap .post-tags .badge { cursor: default; }
    .article-not-found {
        text-align: center; padding: 80px 24px;
    }
    .article-not-found i { font-size: 64px; color: var(--text-light); margin-bottom: 24px; }
    .article-not-found h2 { font-size: 28px; color: var(--text); margin-bottom: 12px; }
    .article-not-found p { color: var(--text-light); margin-bottom: 24px; font-size: 16px; }

    /* ===== 相关推荐 ===== */
    .related-section {
        padding: 60px 0; background: var(--bg-card);
    }
    .section-title {
        font-size: 28px; font-weight: 700; color: var(--secondary);
        text-align: center; margin-bottom: 8px;
    }
    .section-subtitle {
        text-align: center; color: var(--text-light); font-size: 16px;
        margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto;
    }
    .related-grid {
        display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
    }
    .card {
        background: var(--bg-card); border-radius: var(--radius);
        box-shadow: var(--shadow); overflow: hidden;
        transition: var(--transition); border: 1px solid var(--border);
    }
    .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
    .card .card-img {
        width: 100%; height: 180px; object-fit: cover;
        border-radius: var(--radius) var(--radius) 0 0;
    }
    .card .card-body { padding: 20px 22px 24px; }
    .card .card-body .badge { margin-bottom: 10px; }
    .card .card-body h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
    .card .card-body h3 a { color: var(--text); }
    .card .card-body h3 a:hover { color: var(--primary); }
    .card .card-body p { font-size: 14px; color: var(--text-light); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .card .card-body .meta { font-size: 13px; color: var(--text-light); margin-top: 12px; display: flex; gap: 14px; }

    /* ===== 分类入口 ===== */
    .category-entry {
        padding: 60px 0; background: var(--bg);
    }
    .cat-grid {
        display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
    }
    .cat-card {
        border-radius: var(--radius); overflow: hidden;
        position: relative; height: 240px;
        background: var(--bg-dark); box-shadow: var(--shadow);
        transition: var(--transition); cursor: pointer;
    }
    .cat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .cat-card img {
        width: 100%; height: 100%; object-fit: cover;
        transition: var(--transition); opacity: 0.6;
    }
    .cat-card:hover img { transform: scale(1.05); opacity: 0.4; }
    .cat-card .overlay {
        position: absolute; inset: 0;
        display: flex; flex-direction: column; justify-content: flex-end;
        padding: 28px 24px;
        background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 60%);
    }
    .cat-card .overlay h3 { color: #fff; font-size: 22px; font-weight: 700; margin-bottom: 4px; }
    .cat-card .overlay p { color: rgba(255,255,255,0.8); font-size: 14px; }

    /* ===== FAQ ===== */
    .faq-section {
        padding: 60px 0; background: var(--bg-card);
    }
    .faq-list { max-width: 780px; margin: 0 auto; }
    .faq-item {
        border: 1px solid var(--border); border-radius: var(--radius-sm);
        margin-bottom: 12px; overflow: hidden; transition: var(--transition);
    }
    .faq-item:hover { border-color: var(--primary-light); }
    .faq-question {
        display: flex; justify-content: space-between; align-items: center;
        padding: 18px 24px; cursor: pointer;
        font-weight: 600; font-size: 16px; color: var(--text);
        background: var(--bg-card); transition: var(--transition);
        user-select: none;
    }
    .faq-question:hover { background: var(--primary-light); }
    .faq-question i { color: var(--primary); transition: var(--transition); font-size: 14px; }
    .faq-item.active .faq-question i { transform: rotate(180deg); }
    .faq-answer {
        padding: 0 24px; max-height: 0; overflow: hidden;
        transition: var(--transition); background: var(--bg-card);
        color: var(--text-light); font-size: 15px; line-height: 1.7;
    }
    .faq-item.active .faq-answer { padding: 0 24px 20px; max-height: 300px; }

    /* ===== CTA ===== */
    .cta-section {
        padding: 80px 0; background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-alt) 100%);
        position: relative; overflow: hidden;
    }
    .cta-section::before {
        content: ''; position: absolute; inset: 0;
        background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        opacity: 0.1; mix-blend-mode: overlay;
    }
    .cta-section .container { position: relative; z-index: 2; text-align: center; }
    .cta-section h2 { font-size: 32px; font-weight: 700; color: #fff; margin-bottom: 12px; }
    .cta-section p { font-size: 17px; color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 32px; }
    .cta-section .btn { background: var(--accent); color: #fff; box-shadow: 0 4px 20px rgba(243,156,18,0.4); }
    .cta-section .btn:hover { background: #e67e22; box-shadow: 0 8px 32px rgba(243,156,18,0.5); }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--secondary); color: rgba(255,255,255,0.8);
        padding: 60px 0 0;
    }
    .site-footer .grid-4 {
        display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px;
        padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .site-footer .logo { color: #fff; margin-bottom: 12px; }
    .site-footer .logo i { color: var(--accent); }
    .site-footer p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.6); }
    .site-footer h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
    .site-footer a { color: rgba(255,255,255,0.6); font-size: 14px; display: inline-block; margin-bottom: 8px; }
    .site-footer a:hover { color: var(--accent); }
    .site-footer .social { display: flex; gap: 14px; margin-top: 16px; }
    .site-footer .social a {
        width: 40px; height: 40px; border-radius: 50%;
        background: rgba(255,255,255,0.1); display: flex; align-items: center; justify-content: center;
        color: rgba(255,255,255,0.7); font-size: 18px; margin-bottom: 0;
        transition: var(--transition);
    }
    .site-footer .social a:hover { background: var(--primary); color: #fff; }
    .footer-bottom {
        display: flex; justify-content: space-between; align-items: center;
        padding: 20px 0; font-size: 13px; color: rgba(255,255,255,0.4);
        flex-wrap: wrap; gap: 12px;
    }
    .footer-bottom a { color: rgba(255,255,255,0.5); margin: 0 4px; }
    .footer-bottom a:hover { color: var(--accent); }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .related-grid { grid-template-columns: repeat(2, 1fr); }
        .cat-grid { grid-template-columns: repeat(2, 1fr); }
        .site-footer .grid-4 { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    }
    @media (max-width: 768px) {
        :root { --header-h: 64px; }
        .nav-toggle { display: block; }
        .nav-list {
            position: fixed; top: var(--header-h); left: 0; width: 100%;
            flex-direction: column; background: rgba(255,255,255,0.98);
            backdrop-filter: blur(20px); padding: 16px 24px 24px;
            box-shadow: var(--shadow); gap: 4px;
            transform: translateY(-120%); opacity: 0; pointer-events: none;
            transition: var(--transition); border-bottom: 1px solid var(--border);
        }
        .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
        .nav-list a { width: 100%; justify-content: center; padding: 12px 20px; font-size: 16px; }
        .article-hero { padding: 80px 0 60px; }
        .article-hero h1 { font-size: 28px; }
        .article-body .content-wrap { padding: 28px 24px; }
        .article-body .content-wrap .post-content { font-size: 16px; }
        .related-grid { grid-template-columns: 1fr; gap: 20px; }
        .cat-grid { grid-template-columns: 1fr; gap: 20px; }
        .cat-card { height: 200px; }
        .site-footer .grid-4 { grid-template-columns: 1fr; gap: 28px; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .cta-section h2 { font-size: 26px; }
        .section-title { font-size: 24px; }
        .article-hero .meta { gap: 16px; font-size: 14px; flex-wrap: wrap; }
    }
    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .article-hero h1 { font-size: 22px; }
        .article-body .content-wrap { padding: 20px 16px; border-radius: var(--radius-sm); }
        .article-body .content-wrap .post-content { font-size: 15px; }
        .btn { padding: 12px 24px; font-size: 15px; }
        .logo { font-size: 18px; }
        .logo i { font-size: 22px; }
        .cat-card { height: 170px; }
        .cat-card .overlay { padding: 20px 18px; }
        .cat-card .overlay h3 { font-size: 18px; }
        .faq-question { font-size: 15px; padding: 14px 18px; }
        .faq-answer { font-size: 14px; }
        .section-title { font-size: 20px; }
        .section-subtitle { font-size: 14px; }
    }