/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --clr-primary: #1a3a6b;
        --clr-primary-dark: #0f1f3d;
        --clr-primary-light: #2a5a9b;
        --clr-accent: #d4a843;
        --clr-accent-light: #e8c56a;
        --clr-accent-dark: #b8902e;
        --clr-bg: #f5f3ef;
        --clr-bg-alt: #ebe8e2;
        --clr-bg-card: #ffffff;
        --clr-text: #1a1a2e;
        --clr-text-light: #555570;
        --clr-text-muted: #8a8a9a;
        --clr-border: #ddd9d2;
        --clr-border-light: #edeae4;
        --clr-shadow: rgba(26, 26, 46, 0.08);
        --clr-shadow-hover: rgba(26, 26, 46, 0.15);
        --clr-overlay: rgba(10, 18, 30, 0.65);
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --shadow-sm: 0 2px 8px var(--clr-shadow);
        --shadow-md: 0 6px 24px var(--clr-shadow);
        --shadow-lg: 0 12px 40px var(--clr-shadow-hover);
        --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        --container-max: 1200px;
        --container-pad: 24px;
        --nav-height: 72px;
    }

    /* ===== 基础重置 ===== */
    *,
    *::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(--clr-text);
        background: var(--clr-bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: var(--transition);
    }
    a:hover {
        color: var(--clr-primary-light);
    }
    a:focus-visible {
        outline: 2px solid var(--clr-accent);
        outline-offset: 2px;
        border-radius: var(--radius-sm);
    }
    img {
        display: block;
        max-width: 100%;
        height: auto;
    }
    button,
    input,
    textarea,
    select {
        font: inherit;
        color: inherit;
        border: none;
        outline: none;
        background: transparent;
    }
    button {
        cursor: pointer;
    }
    ul,
    ol {
        list-style: none;
    }
    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        line-height: 1.3;
        font-weight: 700;
        color: var(--clr-primary-dark);
    }
    h1 {
        font-size: clamp(2.2rem, 5.5vw, 3.6rem);
    }
    h2 {
        font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    }
    h3 {
        font-size: clamp(1.2rem, 2.2vw, 1.6rem);
    }
    p {
        margin-bottom: 1rem;
        color: var(--clr-text-light);
    }

    /* ===== 容器 ===== */
    .container {
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 0 var(--container-pad);
        width: 100%;
    }

    /* ===== 通用板块间距 ===== */
    .section {
        padding: 80px 0;
    }
    .section-alt {
        background: var(--clr-bg-alt);
    }
    .section-title {
        text-align: center;
        margin-bottom: 12px;
    }
    .section-subtitle {
        text-align: center;
        color: var(--clr-text-muted);
        font-size: 1.05rem;
        max-width: 640px;
        margin: 0 auto 48px auto;
    }
    .section-divider {
        width: 60px;
        height: 3px;
        background: var(--clr-accent);
        border-radius: 4px;
        margin: 16px auto 32px auto;
    }

    /* ===== 按钮 ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 28px;
        font-weight: 600;
        font-size: 0.95rem;
        border-radius: var(--radius-md);
        transition: var(--transition);
        border: 2px solid transparent;
        text-align: center;
        justify-content: center;
    }
    .btn-primary {
        background: var(--clr-accent);
        color: var(--clr-primary-dark);
        border-color: var(--clr-accent);
        box-shadow: 0 4px 14px rgba(212, 168, 67, 0.35);
    }
    .btn-primary:hover {
        background: var(--clr-accent-light);
        border-color: var(--clr-accent-light);
        box-shadow: 0 6px 24px rgba(212, 168, 67, 0.45);
        transform: translateY(-2px);
        color: var(--clr-primary-dark);
    }
    .btn-primary:active {
        transform: translateY(0);
        box-shadow: 0 2px 8px rgba(212, 168, 67, 0.3);
    }
    .btn-outline {
        background: transparent;
        color: var(--clr-bg-card);
        border-color: var(--clr-bg-card);
    }
    .btn-outline:hover {
        background: var(--clr-bg-card);
        color: var(--clr-primary-dark);
        border-color: var(--clr-bg-card);
        transform: translateY(-2px);
    }
    .btn-outline:active {
        transform: translateY(0);
    }
    .btn-sm {
        padding: 8px 18px;
        font-size: 0.85rem;
        border-radius: var(--radius-sm);
    }
    .btn-lg {
        padding: 16px 36px;
        font-size: 1.05rem;
        border-radius: var(--radius-lg);
    }

    /* ===== 卡片基础 ===== */
    .card {
        background: var(--clr-bg-card);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        overflow: hidden;
    }
    .card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-4px);
    }
    .card-img {
        width: 100%;
        aspect-ratio: 16 / 10;
        object-fit: cover;
        display: block;
    }
    .card-body {
        padding: 24px;
    }
    .card-title {
        font-size: 1.15rem;
        font-weight: 700;
        margin-bottom: 8px;
        color: var(--clr-primary-dark);
    }
    .card-text {
        font-size: 0.92rem;
        color: var(--clr-text-light);
        line-height: 1.6;
    }
    .card-tag {
        display: inline-block;
        padding: 4px 12px;
        font-size: 0.78rem;
        font-weight: 600;
        border-radius: 20px;
        background: var(--clr-bg-alt);
        color: var(--clr-text-light);
        margin-bottom: 12px;
    }
    .card-tag-accent {
        background: rgba(212, 168, 67, 0.15);
        color: var(--clr-accent-dark);
    }

    /* ===== 徽章 ===== */
    .badge {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        padding: 4px 14px;
        font-size: 0.78rem;
        font-weight: 600;
        border-radius: 20px;
        background: var(--clr-primary);
        color: #fff;
    }
    .badge-accent {
        background: var(--clr-accent);
        color: var(--clr-primary-dark);
    }

    /* ===== 导航 ===== */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(15, 26, 46, 0.92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        height: var(--nav-height);
        transition: var(--transition);
    }
    .header.scrolled {
        background: rgba(15, 26, 46, 0.98);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }
    .nav {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: var(--nav-height);
    }
    .nav-logo {
        font-size: 1.2rem;
        font-weight: 800;
        color: #fff;
        letter-spacing: 0.5px;
        display: flex;
        align-items: center;
        gap: 8px;
        white-space: nowrap;
    }
    .nav-logo i {
        color: var(--clr-accent);
        font-size: 1.4rem;
    }
    .nav-logo:hover {
        color: var(--clr-accent-light);
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .nav-link {
        padding: 8px 18px;
        font-size: 0.9rem;
        font-weight: 500;
        color: rgba(255, 255, 255, 0.75);
        border-radius: var(--radius-sm);
        transition: var(--transition);
        white-space: nowrap;
    }
    .nav-link:hover {
        color: #fff;
        background: rgba(255, 255, 255, 0.08);
    }
    .nav-link.active {
        color: #fff;
        background: rgba(212, 168, 67, 0.2);
        box-shadow: inset 0 -2px 0 var(--clr-accent);
    }
    .nav-cta {
        margin-left: 12px;
        padding: 8px 20px;
        background: var(--clr-accent);
        color: var(--clr-primary-dark) !important;
        border-radius: var(--radius-sm);
        font-weight: 700;
        font-size: 0.88rem;
        transition: var(--transition);
        white-space: nowrap;
    }
    .nav-cta:hover {
        background: var(--clr-accent-light);
        transform: translateY(-1px);
        box-shadow: 0 4px 14px rgba(212, 168, 67, 0.4);
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: 8px;
        background: transparent;
        border: none;
        cursor: pointer;
    }
    .nav-toggle span {
        display: block;
        width: 26px;
        height: 2.5px;
        background: #fff;
        border-radius: 4px;
        transition: var(--transition);
    }
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        min-height: 92vh;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: 120px 0 80px;
        overflow: hidden;
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        filter: brightness(0.45) saturate(1.1);
        z-index: 0;
    }
    .hero-bg::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(10, 18, 30, 0.75) 0%, rgba(15, 26, 46, 0.5) 50%, rgba(10, 18, 30, 0.75) 100%);
        z-index: 1;
    }
    .hero .container {
        position: relative;
        z-index: 2;
        max-width: 860px;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 20px;
        background: rgba(212, 168, 67, 0.2);
        border: 1px solid rgba(212, 168, 67, 0.3);
        border-radius: 40px;
        color: var(--clr-accent-light);
        font-size: 0.85rem;
        font-weight: 500;
        margin-bottom: 24px;
        backdrop-filter: blur(4px);
    }
    .hero-title {
        color: #fff;
        font-weight: 800;
        line-height: 1.15;
        margin-bottom: 20px;
        text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    }
    .hero-title span {
        color: var(--clr-accent);
    }
    .hero-sub {
        font-size: clamp(1.05rem, 2vw, 1.3rem);
        color: rgba(255, 255, 255, 0.8);
        max-width: 640px;
        margin: 0 auto 36px auto;
        line-height: 1.7;
        text-shadow: 0 1px 8px rgba(0, 0, 0, 0.2);
    }
    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        justify-content: center;
    }
    .hero-stats {
        display: flex;
        flex-wrap: wrap;
        gap: 32px 48px;
        justify-content: center;
        margin-top: 56px;
        padding-top: 40px;
        border-top: 1px solid rgba(255, 255, 255, 0.12);
    }
    .hero-stat {
        text-align: center;
    }
    .hero-stat-num {
        font-size: 2.2rem;
        font-weight: 800;
        color: #fff;
        line-height: 1.2;
    }
    .hero-stat-num span {
        color: var(--clr-accent);
    }
    .hero-stat-label {
        font-size: 0.85rem;
        color: rgba(255, 255, 255, 0.6);
        margin-top: 4px;
    }

    /* ===== 特性/优势 ===== */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        gap: 28px;
    }
    .feature-card {
        text-align: center;
        padding: 40px 28px;
        background: var(--clr-bg-card);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        border: 1px solid var(--clr-border-light);
    }
    .feature-card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-6px);
        border-color: var(--clr-accent);
    }
    .feature-icon {
        width: 64px;
        height: 64px;
        margin: 0 auto 20px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(212, 168, 67, 0.12);
        border-radius: 50%;
        font-size: 1.6rem;
        color: var(--clr-accent);
        transition: var(--transition);
    }
    .feature-card:hover .feature-icon {
        background: var(--clr-accent);
        color: #fff;
        transform: scale(1.05);
    }
    .feature-title {
        font-size: 1.15rem;
        font-weight: 700;
        margin-bottom: 10px;
        color: var(--clr-primary-dark);
    }
    .feature-desc {
        font-size: 0.92rem;
        color: var(--clr-text-light);
        line-height: 1.7;
        margin-bottom: 0;
    }

    /* ===== 认证分类 ===== */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
        gap: 24px;
    }
    .category-card {
        position: relative;
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        cursor: pointer;
        background: var(--clr-bg-card);
    }
    .category-card:hover {
        box-shadow: var(--shadow-lg);
        transform: translateY(-6px);
    }
    .category-card img {
        width: 100%;
        aspect-ratio: 16 / 11;
        object-fit: cover;
        transition: var(--transition);
    }
    .category-card:hover img {
        transform: scale(1.03);
    }
    .category-overlay {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        padding: 20px 24px;
        background: linear-gradient(transparent, rgba(10, 18, 30, 0.85));
        color: #fff;
    }
    .category-overlay h3 {
        color: #fff;
        font-size: 1.15rem;
        font-weight: 700;
        margin-bottom: 4px;
    }
    .category-overlay p {
        color: rgba(255, 255, 255, 0.7);
        font-size: 0.85rem;
        margin-bottom: 0;
    }
    .category-tag {
        position: absolute;
        top: 16px;
        left: 16px;
        padding: 4px 14px;
        background: var(--clr-accent);
        color: var(--clr-primary-dark);
        font-size: 0.75rem;
        font-weight: 700;
        border-radius: 20px;
        z-index: 2;
    }

    /* ===== 最新资讯 ===== */
    .news-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 24px;
    }
    .news-card {
        background: var(--clr-bg-card);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }
    .news-card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-4px);
    }
    .news-card img {
        width: 100%;
        aspect-ratio: 16 / 10;
        object-fit: cover;
    }
    .news-body {
        padding: 20px 24px 24px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .news-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 0.8rem;
        color: var(--clr-text-muted);
        margin-bottom: 10px;
    }
    .news-meta .badge {
        font-size: 0.7rem;
        padding: 2px 10px;
    }
    .news-title {
        font-size: 1.05rem;
        font-weight: 700;
        color: var(--clr-primary-dark);
        margin-bottom: 8px;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-excerpt {
        font-size: 0.88rem;
        color: var(--clr-text-light);
        line-height: 1.6;
        flex: 1;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 16px;
    }
    .news-link {
        font-size: 0.85rem;
        font-weight: 600;
        color: var(--clr-primary);
        display: inline-flex;
        align-items: center;
        gap: 4px;
        margin-top: auto;
    }
    .news-link:hover {
        color: var(--clr-accent-dark);
        gap: 8px;
    }
    .news-empty {
        grid-column: 1 / -1;
        text-align: center;
        padding: 48px 24px;
        background: var(--clr-bg-card);
        border-radius: var(--radius-md);
        color: var(--clr-text-muted);
        font-size: 1rem;
    }

    /* ===== 认证流程 ===== */
    .process {
        background: var(--clr-primary-dark);
        color: #fff;
    }
    .process .section-title {
        color: #fff;
    }
    .process .section-subtitle {
        color: rgba(255, 255, 255, 0.65);
    }
    .process .section-divider {
        background: var(--clr-accent);
    }
    .process-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 24px;
        position: relative;
    }
    .process-step {
        text-align: center;
        padding: 32px 20px;
        position: relative;
        background: rgba(255, 255, 255, 0.05);
        border-radius: var(--radius-md);
        border: 1px solid rgba(255, 255, 255, 0.08);
        transition: var(--transition);
    }
    .process-step:hover {
        background: rgba(255, 255, 255, 0.1);
        transform: translateY(-4px);
    }
    .process-step-num {
        width: 48px;
        height: 48px;
        margin: 0 auto 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--clr-accent);
        color: var(--clr-primary-dark);
        font-size: 1.2rem;
        font-weight: 800;
        border-radius: 50%;
    }
    .process-step h4 {
        color: #fff;
        font-size: 1.1rem;
        font-weight: 700;
        margin-bottom: 8px;
    }
    .process-step p {
        color: rgba(255, 255, 255, 0.65);
        font-size: 0.88rem;
        margin-bottom: 0;
    }

    /* ===== FAQ ===== */
    .faq-list {
        max-width: 780px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: var(--clr-bg-card);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        overflow: hidden;
        border: 1px solid var(--clr-border-light);
        transition: var(--transition);
    }
    .faq-item:hover {
        box-shadow: var(--shadow-md);
    }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 18px 24px;
        font-weight: 600;
        font-size: 1rem;
        color: var(--clr-primary-dark);
        cursor: pointer;
        background: transparent;
        width: 100%;
        text-align: left;
        transition: var(--transition);
        gap: 12px;
    }
    .faq-question:hover {
        color: var(--clr-primary-light);
    }
    .faq-question i {
        font-size: 0.9rem;
        color: var(--clr-accent);
        transition: var(--transition);
        flex-shrink: 0;
    }
    .faq-item.active .faq-question i {
        transform: rotate(180deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.3s ease;
        padding: 0 24px;
        color: var(--clr-text-light);
        font-size: 0.92rem;
        line-height: 1.7;
    }
    .faq-item.active .faq-answer {
        max-height: 300px;
        padding: 0 24px 20px;
    }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--clr-primary-dark) 0%, var(--clr-primary) 100%);
        color: #fff;
        text-align: center;
        padding: 80px 0;
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        opacity: 0.08;
        z-index: 0;
    }
    .cta-section .container {
        position: relative;
        z-index: 1;
    }
    .cta-section h2 {
        color: #fff;
        font-size: clamp(1.8rem, 3.5vw, 2.6rem);
        margin-bottom: 16px;
    }
    .cta-section p {
        color: rgba(255, 255, 255, 0.75);
        font-size: 1.05rem;
        max-width: 560px;
        margin: 0 auto 32px;
    }
    .cta-section .btn-primary {
        font-size: 1.05rem;
        padding: 16px 40px;
    }

    /* ===== 页脚 ===== */
    .footer {
        background: #0c1524;
        color: rgba(255, 255, 255, 0.7);
        padding: 60px 0 0;
    }
    .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 .nav-logo {
        font-size: 1.15rem;
        margin-bottom: 12px;
    }
    .footer-brand p {
        font-size: 0.88rem;
        color: rgba(255, 255, 255, 0.5);
        max-width: 320px;
        line-height: 1.7;
    }
    .footer-col h4 {
        color: #fff;
        font-size: 0.95rem;
        font-weight: 700;
        margin-bottom: 16px;
    }
    .footer-col ul li {
        margin-bottom: 10px;
    }
    .footer-col ul li a {
        font-size: 0.88rem;
        color: rgba(255, 255, 255, 0.55);
        transition: var(--transition);
    }
    .footer-col ul li a:hover {
        color: var(--clr-accent);
        padding-left: 4px;
    }
    .footer-social {
        display: flex;
        gap: 12px;
        margin-top: 16px;
    }
    .footer-social a {
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(255, 255, 255, 0.08);
        border-radius: 50%;
        color: rgba(255, 255, 255, 0.6);
        font-size: 1rem;
        transition: var(--transition);
    }
    .footer-social a:hover {
        background: var(--clr-accent);
        color: var(--clr-primary-dark);
        transform: translateY(-2px);
    }
    .footer-bottom {
        padding: 24px 0;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        gap: 12px;
        font-size: 0.82rem;
        color: rgba(255, 255, 255, 0.35);
    }
    .footer-bottom a {
        color: rgba(255, 255, 255, 0.35);
    }
    .footer-bottom a:hover {
        color: var(--clr-accent);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .process-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }

    @media (max-width: 768px) {
        :root {
            --container-pad: 18px;
            --nav-height: 64px;
        }
        .section {
            padding: 56px 0;
        }
        .nav-links {
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: rgba(15, 26, 46, 0.98);
            backdrop-filter: blur(16px);
            flex-direction: column;
            padding: 20px 24px 28px;
            gap: 8px;
            transform: translateY(-110%);
            opacity: 0;
            transition: var(--transition);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
            align-items: stretch;
        }
        .nav-links.open {
            transform: translateY(0);
            opacity: 1;
        }
        .nav-link {
            padding: 12px 16px;
            font-size: 1rem;
            text-align: center;
        }
        .nav-cta {
            margin-left: 0;
            margin-top: 8px;
            text-align: center;
            padding: 12px 16px;
        }
        .nav-toggle {
            display: flex;
        }
        .hero {
            min-height: 80vh;
            padding: 100px 0 60px;
        }
        .hero-stats {
            gap: 24px 32px;
            padding-top: 28px;
            margin-top: 36px;
        }
        .hero-stat-num {
            font-size: 1.6rem;
        }
        .features-grid {
            grid-template-columns: 1fr;
        }
        .category-grid {
            grid-template-columns: 1fr 1fr;
        }
        .news-grid {
            grid-template-columns: 1fr;
        }
        .process-grid {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
        .faq-question {
            padding: 14px 18px;
            font-size: 0.92rem;
        }
        .faq-answer {
            padding: 0 18px;
            font-size: 0.88rem;
        }
        .faq-item.active .faq-answer {
            padding: 0 18px 16px;
        }
        .cta-section {
            padding: 56px 0;
        }
    }

    @media (max-width: 520px) {
        .category-grid {
            grid-template-columns: 1fr;
        }
        .hero-actions {
            flex-direction: column;
            align-items: center;
        }
        .hero-actions .btn {
            width: 100%;
            max-width: 280px;
        }
        .hero-stats {
            flex-direction: column;
            gap: 16px;
        }
        .nav-logo {
            font-size: 1rem;
        }
        .nav-logo i {
            font-size: 1.1rem;
        }
    }

    /* ===== 滚动条美化 ===== */
    ::-webkit-scrollbar {
        width: 8px;
        height: 8px;
    }
    ::-webkit-scrollbar-track {
        background: var(--clr-bg);
    }
    ::-webkit-scrollbar-thumb {
        background: var(--clr-border);
        border-radius: 8px;
    }
    ::-webkit-scrollbar-thumb:hover {
        background: var(--clr-text-muted);
    }

    /* ===== 选中高亮 ===== */
    ::selection {
        background: var(--clr-accent);
        color: var(--clr-primary-dark);
    }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8a;
            --primary-dark: #0f2440;
            --accent: #e8b830;
            --accent-light: #f0d060;
            --accent-dark: #c9a020;
            --bg: #f8f9fc;
            --bg-alt: #edf0f5;
            --bg-card: #ffffff;
            --text: #1e2a3a;
            --text-light: #5a6a7a;
            --text-muted: #8a9aaa;
            --border: #dce0e8;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 6px 24px rgba(26, 58, 92, 0.08);
            --shadow-hover: 0 12px 36px rgba(26, 58, 92, 0.14);
            --shadow-nav: 0 4px 20px rgba(0, 0, 0, 0.06);
            --font: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
            --transition: 0.32s cubic-bezier(0.22, 1, 0.36, 1);
            --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);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            padding-top: var(--header-h);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        ul {
            list-style: none;
        }

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

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 999;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
        }
        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            transition: opacity var(--transition);
        }
        .nav-logo i {
            color: var(--accent);
            font-size: 24px;
        }
        .nav-logo:hover {
            opacity: 0.82;
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 15px;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 58, 92, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(26, 58, 92, 0.08);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .nav-cta {
            background: var(--primary);
            color: #fff !important;
            padding: 9px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 12px rgba(26, 58, 92, 0.18);
        }
        .nav-cta:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(26, 58, 92, 0.22);
        }
        .nav-cta i {
            font-size: 14px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(26, 58, 92, 0.06);
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 6px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -6px);
        }

        /* ===== Banner ===== */
        .banner {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
            padding: 60px 24px;
        }
        .banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .banner::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 80px;
            background: var(--bg);
            clip-path: ellipse(70% 100% at 50% 100%);
        }
        .banner-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(232, 184, 48, 0.18);
            color: var(--accent-light);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 500;
            border: 1px solid rgba(232, 184, 48, 0.25);
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .banner h1 {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 620px;
            margin: 0 auto 28px;
        }
        .banner-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(232, 184, 48, 0.3);
        }
        .btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 184, 48, 0.35);
            color: var(--primary-dark);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            box-shadow: none;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-sub {
            font-size: 17px;
            color: var(--text-light);
            max-width: 640px;
            margin-bottom: 44px;
        }
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-head .section-sub {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 卡片网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 22px 24px 26px;
        }
        .card-tag {
            display: inline-block;
            background: rgba(232, 184, 48, 0.14);
            color: var(--accent-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 30px;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }
        .card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .card p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.6;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .card-meta i {
            margin-right: 4px;
        }

        /* ===== 赛程板块 ===== */
        .schedule-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .schedule-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 18px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .schedule-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
        }
        .schedule-date {
            min-width: 70px;
            text-align: center;
            font-weight: 700;
            color: var(--primary);
            font-size: 15px;
            line-height: 1.3;
        }
        .schedule-date span {
            display: block;
            font-size: 22px;
            font-weight: 800;
            color: var(--accent-dark);
        }
        .schedule-info {
            flex: 1;
        }
        .schedule-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }
        .schedule-info p {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .schedule-badge {
            background: var(--primary);
            color: #fff;
            padding: 5px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            white-space: nowrap;
        }
        .schedule-badge.live {
            background: #d43f3f;
            animation: pulse-live 1.8s infinite;
        }
        @keyframes pulse-live {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.6;
            }
        }

        /* ===== 场馆图文 ===== */
        .venue-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .venue-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .venue-image img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            transition: transform var(--transition);
        }
        .venue-image:hover img {
            transform: scale(1.03);
        }
        .venue-info h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .venue-info p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .venue-stats {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }
        .venue-stat {
            text-align: center;
        }
        .venue-stat .num {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent-dark);
            line-height: 1.1;
        }
        .venue-stat .label {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ===== 攻略列表 ===== */
        .tip-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .tip-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            text-align: center;
        }
        .tip-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent);
        }
        .tip-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(232, 184, 48, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 26px;
            color: var(--accent-dark);
        }
        .tip-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .tip-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 16px;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(26, 58, 92, 0.03);
        }
        .faq-question i {
            color: var(--accent);
            font-size: 18px;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 72px 24px;
            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 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.78);
            max-width: 560px;
            margin: 0 auto 30px;
        }
        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
        }
        .footer .nav-logo {
            color: #fff;
            margin-bottom: 8px;
        }
        .footer .nav-logo:hover {
            opacity: 0.85;
            color: #fff;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin: 12px 0 18px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .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, 0.7);
            font-size: 18px;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .tip-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .venue-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .banner h1 {
                font-size: 36px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .nav-links {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-nav);
                transform: translateY(-110%);
                opacity: 0;
                transition: all 0.4s ease;
                pointer-events: none;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-link {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-cta {
                justify-content: center;
                margin-top: 6px;
            }
            .nav-toggle {
                display: flex;
            }
            .banner {
                min-height: 280px;
                padding: 40px 20px;
            }
            .banner h1 {
                font-size: 28px;
            }
            .banner p {
                font-size: 16px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .tip-list {
                grid-template-columns: 1fr;
            }
            .schedule-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 16px 18px;
            }
            .schedule-date {
                display: flex;
                gap: 6px;
                align-items: baseline;
                min-width: auto;
            }
            .schedule-date span {
                display: inline;
                font-size: 20px;
            }
            .schedule-badge {
                align-self: flex-start;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .venue-info h2 {
                font-size: 24px;
            }
            .venue-stats {
                gap: 16px;
            }
            .venue-stat .num {
                font-size: 26px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .banner h1 {
                font-size: 22px;
            }
            .banner-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
                font-size: 15px;
            }
            .section-title {
                font-size: 22px;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 16px;
            }
            .cta-section {
                padding: 48px 16px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 滚动渐入 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a45;
            --secondary: #e8b830;
            --secondary-light: #f0d060;
            --secondary-dark: #c9a020;
            --accent: #d4452a;
            --accent-light: #e86045;
            --bg: #f8f7f4;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-soft: #f0efe8;
            --text: #1e1e2a;
            --text-light: #5a5a6a;
            --text-white: #fefefe;
            --border: #e0dfd8;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.10);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --header-h: 76px;
        }

        /* ===== 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);
            padding-top: var(--header-h);
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        a:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        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;
        }

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

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
        }
        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .nav-logo i {
            font-size: 1.6rem;
            color: var(--secondary);
            filter: drop-shadow(0 2px 6px rgba(232, 184, 48, 0.3));
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.10);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .nav-link.nav-cta {
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 8px 22px;
            border-radius: 50px;
            box-shadow: 0 4px 14px rgba(232, 184, 48, 0.3);
            transition: all var(--transition);
            margin-left: 8px;
        }
        .nav-link.nav-cta:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(232, 184, 48, 0.4);
        }
        .nav-link.nav-cta i {
            margin-right: 6px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--text);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 6px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -6px);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 60px 0 50px;
            position: relative;
            overflow: hidden;
            min-height: 200px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -30px;
            left: 0;
            width: 100%;
            height: 60px;
            background: var(--bg);
            border-radius: 50% 50% 0 0 / 100% 100% 0 0;
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            color: var(--text-white);
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.3;
            max-width: 800px;
            margin: 0 auto 12px;
        }
        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--secondary);
        }
        .page-banner .breadcrumb span {
            color: var(--secondary);
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 50px 0 70px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px 44px;
            transition: box-shadow var(--transition);
        }
        .article-body:hover {
            box-shadow: var(--shadow-hover);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 28px;
            margin-bottom: 28px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
        }
        .article-meta .badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--secondary);
            color: var(--primary-dark);
        }
        .article-meta .date {
            font-size: 0.9rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .date i {
            color: var(--primary-light);
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-content p {
            margin-bottom: 1.4em;
        }
        .article-content h2,
        .article-content h3 {
            margin-top: 1.8em;
            margin-bottom: 0.8em;
            font-weight: 700;
            color: var(--primary);
        }
        .article-content h2 {
            font-size: 1.6rem;
        }
        .article-content h3 {
            font-size: 1.25rem;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
        }
        .article-content ul li {
            list-style: disc;
            margin-bottom: 0.4em;
        }
        .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.4em;
        }
        .article-content blockquote {
            border-left: 4px solid var(--secondary);
            background: var(--bg-soft);
            padding: 16px 24px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-content img {
            margin: 1.6em 0;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
        }
        .article-content a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover {
            color: var(--accent-light);
        }
        .article-footer-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-tags .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--bg-soft);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-soft);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .article-share a:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px 24px;
            transition: box-shadow var(--transition);
        }
        .sidebar-card:hover {
            box-shadow: var(--shadow-hover);
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: var(--secondary);
        }
        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar-list li a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            background: var(--bg);
            transition: all var(--transition);
            font-size: 0.92rem;
            color: var(--text);
            line-height: 1.4;
        }
        .sidebar-list li a:hover {
            background: var(--bg-soft);
            transform: translateX(4px);
            color: var(--primary);
        }
        .sidebar-list li a .num {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
        }
        .sidebar-list li a .num.gold {
            background: var(--secondary);
            color: var(--primary-dark);
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            color: var(--text-white);
        }
        .sidebar-cta h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .sidebar-cta p {
            font-size: 0.92rem;
            opacity: 0.85;
            margin-bottom: 20px;
        }
        .sidebar-cta .btn {
            display: inline-block;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.95rem;
            background: var(--secondary);
            color: var(--primary-dark);
            box-shadow: 0 4px 16px rgba(232, 184, 48, 0.3);
            transition: all var(--transition);
        }
        .sidebar-cta .btn:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(232, 184, 48, 0.4);
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--border);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.6rem;
            color: var(--text);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .not-found-box .btn-back {
            display: inline-block;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            background: var(--primary);
            color: var(--text-white);
            transition: all var(--transition);
        }
        .not-found-box .btn-back:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 50px 0 60px;
            background: var(--bg-soft);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            text-align: center;
            margin-bottom: 12px;
        }
        .related-section .section-sub {
            text-align: center;
            color: var(--text-light);
            margin-bottom: 36px;
            font-size: 0.95rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            height: 180px;
            background: var(--bg-soft);
            overflow: hidden;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.88rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-body .meta {
            font-size: 0.8rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-card .card-body .meta .badge-sm {
            padding: 2px 12px;
            border-radius: 50px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 600;
            font-size: 0.7rem;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-logo {
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .footer-brand .nav-logo i {
            color: var(--secondary);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            opacity: 0.75;
            max-width: 320px;
            margin-bottom: 18px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.82rem;
            opacity: 0.6;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.75);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .nav-links {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 28px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s ease;
                pointer-events: none;
                border-radius: 0 0 var(--radius) var(--radius);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-link {
                width: 100%;
                padding: 12px 18px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }
            .nav-link.nav-cta {
                margin-left: 0;
                margin-top: 6px;
                text-align: center;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }

            .page-banner {
                padding: 40px 0 36px;
                min-height: 160px;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .article-body {
                padding: 24px 20px;
            }
            .article-meta {
                gap: 12px 20px;
                margin-bottom: 20px;
                padding-bottom: 16px;
            }
            .article-content {
                font-size: 0.98rem;
            }
            .article-content h2 {
                font-size: 1.3rem;
            }
            .article-content h3 {
                font-size: 1.1rem;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .related-section {
                padding: 36px 0 44px;
            }
            .related-section .section-title {
                font-size: 1.3rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-logo {
                font-size: 1.05rem;
            }
            .nav-logo i {
                font-size: 1.2rem;
            }
            .page-banner h1 {
                font-size: 1.2rem;
            }
            .article-body {
                padding: 18px 14px;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .article-footer-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .sidebar-card {
                padding: 20px 16px;
            }
            .sidebar-cta {
                padding: 24px 16px;
            }
        }

        /* ===== Skeleton / Loading ===== */
        @keyframes shimmer {
            0% {
                background-position: -200px 0;
            }
            100% {
                background-position: 200px 0;
            }
        }
        .skeleton {
            background: linear-gradient(90deg, var(--bg) 25%, var(--bg-soft) 50%, var(--bg) 75%);
            background-size: 400px 100%;
            animation: shimmer 1.6s infinite;
            border-radius: var(--radius-sm);
        }

        /* ===== Print ===== */
        @media print {
            .header,
            .footer,
            .article-sidebar,
            .related-section,
            .page-banner::after {
                display: none !important;
            }
            body {
                padding-top: 0 !important;
                background: #fff;
            }
            .article-body {
                box-shadow: none;
                border: 1px solid #ddd;
                padding: 20px;
            }
            .page-banner {
                padding: 20px 0;
                background: #f5f5f5 !important;
                min-height: auto;
            }
            .page-banner h1 {
                color: #000 !important;
            }
            .page-banner .breadcrumb {
                color: #666 !important;
            }
            .page-banner .breadcrumb a {
                color: #333 !important;
            }
        }