/* roulang page: index */
/* ========== 设计变量与基础 Reset ========== */
    :root {
        --primary: #0D2530;
        --accent: #E9A338;
        --accent-dark: #D78B24;
        --accent-grad: linear-gradient(135deg, #F7C65A, #E49A2A);
        --bg-white: #FFFFFF;
        --bg-light: #F3F7F9;
        --text-dark: #15262F;
        --text-body: #51656F;
        --text-muted: #8B9AA3;
        --border: #E3E9ED;
        --success: #1D9E5A;
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --shadow-sm: 0 1px 3px rgba(13, 37, 48, .06);
        --shadow-hover: 0 12px 24px rgba(13, 37, 48, .12);
        --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
        --font-num: "Inter", "DIN Alternate", sans-serif;
        --transition: all .25s ease;
    }
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: var(--font-sans);
        font-size: 15px;
        line-height: 1.8;
        color: var(--text-body);
        background: var(--bg-white);
        -webkit-font-smoothing: antialiased;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: var(--transition);
    }
    button {
        font-family: inherit;
        border: none;
        cursor: pointer;
        background: none;
    }
    input {
        font-family: inherit;
        border: none;
        outline: none;
    }
    ul,
    ol {
        list-style: none;
    }

    /* ========== 容器与通用布局 ========== */
    .container {
        max-width: 1240px;
        margin: 0 auto;
        padding: 0 24px;
    }
    .section {
        padding: 96px 0;
    }
    .section-alt {
        background: var(--bg-light);
    }
    .section-title {
        font-size: 34px;
        font-weight: 700;
        color: var(--text-dark);
        line-height: 1.25;
        letter-spacing: -0.01em;
        margin-bottom: 16px;
    }
    .section-sub {
        font-size: 16px;
        color: var(--text-body);
        max-width: 640px;
        line-height: 1.7;
        margin-bottom: 48px;
    }
    .section-head {
        margin-bottom: 48px;
    }

    /* ========== 按钮 ========== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: 10px;
        font-size: 15px;
        font-weight: 600;
        line-height: 1.2;
        min-height: 44px;
        transition: var(--transition);
        border: 1px solid transparent;
        white-space: nowrap;
        cursor: pointer;
    }
    .btn-primary {
        background: var(--accent-grad);
        color: #15262F;
        box-shadow: 0 2px 8px rgba(233, 163, 56, .35);
    }
    .btn-primary:hover {
        box-shadow: 0 8px 20px rgba(233, 163, 56, .45);
        filter: brightness(1.05);
        transform: translateY(-1px);
    }
    .btn-primary:active {
        transform: scale(.98);
    }
    .btn-outline {
        background: transparent;
        color: #fff;
        border-color: rgba(255, 255, 255, .7);
    }
    .btn-outline:hover {
        background: rgba(255, 255, 255, .1);
        border-color: #fff;
    }
    .btn-light {
        background: #fff;
        color: var(--primary);
        border: 1px solid var(--border);
    }
    .btn-light:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-1px);
    }
    .btn-lg {
        padding: 16px 40px;
        font-size: 16px;
        border-radius: 12px;
    }
    .btn-sm {
        padding: 8px 18px;
        font-size: 13px;
        min-height: 36px;
        border-radius: 8px;
    }
    .btn:focus-visible,
    a:focus-visible {
        outline: 3px solid rgba(233, 163, 56, .5);
        outline-offset: 2px;
    }

    /* ========== 标签 / 徽章 ========== */
    .badge {
        display: inline-block;
        padding: 4px 12px;
        border-radius: var(--radius-sm);
        font-size: 12px;
        font-weight: 600;
        line-height: 1.4;
    }
    .badge-green {
        background: rgba(29, 158, 90, .12);
        color: var(--success);
    }
    .badge-gold {
        background: rgba(233, 163, 56, .15);
        color: #B8751F;
    }
    .badge-dark {
        background: var(--primary);
        color: var(--accent);
    }
    .hero-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        border: 1px solid rgba(233, 163, 56, .6);
        color: var(--accent);
        font-size: 13px;
        font-weight: 600;
        padding: 6px 16px;
        border-radius: 30px;
        background: rgba(13, 37, 48, .3);
        margin-bottom: 24px;
        letter-spacing: .02em;
    }

    /* ========== Header / Nav ========== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: #fff;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 1px 6px rgba(13, 37, 48, .04);
        height: 72px;
        display: flex;
        align-items: center;
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        width: 100%;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 12px;
        flex-shrink: 0;
    }
    .logo-icon {
        width: 44px;
        height: 44px;
        border-radius: 10px;
        background: var(--primary);
        color: var(--accent);
        font-family: var(--font-num);
        font-weight: 800;
        font-size: 18px;
        display: flex;
        align-items: center;
        justify-content: center;
        letter-spacing: -.02em;
        flex-shrink: 0;
    }
    .logo-text {
        font-size: 18px;
        font-weight: 800;
        color: var(--text-dark);
        letter-spacing: -0.01em;
        white-space: nowrap;
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: 4px;
    }
    .main-nav .nav-link {
        padding: 8px 14px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-body);
        border-radius: 8px;
        position: relative;
        transition: var(--transition);
        white-space: nowrap;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }
    .main-nav .nav-link:hover {
        color: var(--primary);
        background: rgba(13, 37, 48, .04);
    }
    .main-nav .nav-link.active {
        color: var(--primary);
        font-weight: 700;
    }
    .main-nav .nav-link.active::after {
        content: '';
        position: absolute;
        left: 14px;
        right: 14px;
        bottom: 0;
        height: 3px;
        border-radius: 3px 3px 0 0;
        background: var(--accent);
    }
    .header-actions {
        display: flex;
        align-items: center;
        gap: 12px;
        flex-shrink: 0;
    }
    .search-box {
        position: relative;
    }
    .search-box input {
        width: 180px;
        height: 40px;
        padding: 0 14px 0 38px;
        border-radius: 10px;
        background: var(--bg-light);
        border: 1px solid transparent;
        font-size: 14px;
        color: var(--text-dark);
        transition: var(--transition);
    }
    .search-box input::placeholder {
        color: var(--text-muted);
    }
    .search-box input:focus {
        width: 220px;
        border-color: var(--accent);
        box-shadow: 0 0 0 3px rgba(233, 163, 56, .2);
        background: #fff;
    }
    .search-box .search-icon {
        position: absolute;
        left: 12px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--text-muted);
        font-size: 14px;
        pointer-events: none;
    }
    .hamburger {
        display: none;
        width: 44px;
        height: 44px;
        border-radius: 10px;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        color: var(--text-dark);
        border: 1px solid var(--border);
        background: #fff;
    }

    /* ========== Hero ========== */
    .hero {
        position: relative;
        min-height: 680px;
        display: flex;
        align-items: center;
        overflow: hidden;
        background: var(--primary);
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background-size: cover;
        background-position: center;
        opacity: .6;
    }
    .hero-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(13, 37, 48, .88) 10%, rgba(13, 37, 48, .75) 40%, rgba(13, 37, 48, .6));
        z-index: 1;
    }
    .hero-inner {
        position: relative;
        z-index: 2;
        width: 100%;
        padding: 80px 0;
    }
    .hero h1 {
        font-size: 54px;
        font-weight: 800;
        color: #fff;
        line-height: 1.18;
        letter-spacing: -0.01em;
        max-width: 720px;
        margin-bottom: 20px;
    }
    .hero-sub {
        font-size: 18px;
        line-height: 1.7;
        color: rgba(255, 255, 255, .85);
        max-width: 560px;
        margin-bottom: 36px;
    }
    .hero-ctas {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
        margin-bottom: 56px;
    }
    .hero-trust {
        display: flex;
        align-items: center;
        gap: 32px;
        flex-wrap: wrap;
    }
    .hero-trust span {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        color: rgba(255, 255, 255, .8);
        font-size: 14px;
        font-weight: 500;
    }
    .hero-trust i {
        color: var(--accent);
        font-size: 16px;
    }

    /* ========== 价值点卡片 ========== */
    .values-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }
    .value-card {
        background: #fff;
        border-radius: var(--radius-md);
        padding: 32px 28px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        transition: var(--transition);
    }
    .value-card:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-4px);
    }
    .value-card .value-icon {
        width: 48px;
        height: 48px;
        border-radius: 12px;
        background: rgba(233, 163, 56, .12);
        color: var(--accent-dark);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        margin-bottom: 20px;
    }
    .value-card h3 {
        font-size: 19px;
        font-weight: 700;
        color: var(--text-dark);
        margin-bottom: 10px;
        line-height: 1.4;
    }
    .value-card p {
        font-size: 14px;
        line-height: 1.7;
        color: var(--text-body);
    }

    /* ========== 功能分组 Tab ========== */
    .features-wrap {
        display: grid;
        grid-template-columns: 300px 1fr;
        gap: 48px;
        align-items: start;
    }
    .features-tabs {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
    .feature-tab {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 16px 20px;
        border-radius: var(--radius-md);
        font-size: 15px;
        font-weight: 500;
        color: var(--text-body);
        background: #fff;
        border: 1px solid var(--border);
        transition: var(--transition);
        text-align: left;
        width: 100%;
        cursor: pointer;
    }
    .feature-tab:hover {
        border-color: var(--accent);
        color: var(--primary);
    }
    .feature-tab.active {
        border-left: 3px solid var(--accent);
        color: var(--primary);
        font-weight: 700;
        background: #fff;
        box-shadow: var(--shadow-sm);
    }
    .feature-tab i {
        font-size: 18px;
        color: var(--accent-dark);
        width: 24px;
        text-align: center;
    }
    .features-panel {
        background: #fff;
        border-radius: var(--radius-lg);
        padding: 36px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
    }
    .features-panel h3 {
        font-size: 24px;
        font-weight: 700;
        color: var(--text-dark);
        margin-bottom: 12px;
    }
    .features-panel .panel-desc {
        font-size: 15px;
        line-height: 1.75;
        color: var(--text-body);
        margin-bottom: 20px;
        max-width: 520px;
    }
    .feature-list {
        margin-bottom: 24px;
    }
    .feature-list li {
        display: flex;
        align-items: flex-start;
        gap: 10px;
        font-size: 14px;
        color: var(--text-body);
        padding: 6px 0;
    }
    .feature-list li i {
        color: var(--accent);
        font-size: 14px;
        margin-top: 5px;
    }
    .panel-img {
        border-radius: var(--radius-md);
        overflow: hidden;
        aspect-ratio: 16/10;
    }
    .panel-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    /* ========== 场景区 ========== */
    .scenario-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    .scenario-card {
        background: #fff;
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        transition: var(--transition);
    }
    .scenario-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-hover);
    }
    .scenario-card .scenario-img {
        aspect-ratio: 16/9;
        overflow: hidden;
        background: var(--bg-light);
    }
    .scenario-card .scenario-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .4s ease;
    }
    .scenario-card:hover .scenario-img img {
        transform: scale(1.03);
    }
    .scenario-body {
        padding: 24px 28px 28px;
    }
    .scenario-body h3 {
        font-size: 19px;
        font-weight: 700;
        color: var(--text-dark);
        margin-bottom: 8px;
    }
    .scenario-body p {
        font-size: 14px;
        color: var(--text-body);
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .scenario-body .scenario-link {
        font-size: 14px;
        font-weight: 600;
        color: var(--accent-dark);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .scenario-body .scenario-link:hover {
        color: var(--accent-dark);
        gap: 10px;
    }

    /* ========== 数据墙 ========== */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 48px;
        text-align: center;
        margin-bottom: 64px;
    }
    .stat-item .stat-num {
        font-family: var(--font-num);
        font-size: 42px;
        font-weight: 800;
        color: var(--accent);
        line-height: 1.2;
        margin-bottom: 8px;
    }
    .stat-item .stat-label {
        font-size: 14px;
        color: var(--text-muted);
    }
    .logo-wall {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 56px;
        flex-wrap: wrap;
        padding: 24px 0;
    }
    .brand-wordmark {
        font-family: var(--font-num);
        font-size: 22px;
        font-weight: 700;
        color: #B5C1C8;
        letter-spacing: .02em;
        white-space: nowrap;
        filter: grayscale(1);
        opacity: .7;
        transition: var(--transition);
    }
    .brand-wordmark:hover {
        opacity: 1;
        color: var(--text-body);
    }

    /* ========== 价格区 ========== */
    .pricing-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
        align-items: center;
    }
    .price-card {
        background: #fff;
        border-radius: var(--radius-md);
        border: 1px solid var(--border);
        padding: 40px 32px;
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        position: relative;
    }
    .price-card:hover {
        box-shadow: var(--shadow-hover);
    }
    .price-card.featured {
        background: var(--primary);
        border-radius: var(--radius-lg);
        padding: 56px 40px;
        box-shadow: 0 20px 40px rgba(13, 37, 48, .25);
        border: none;
        transform: translateY(-8px);
    }
    .price-card .price-name {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-dark);
        margin-bottom: 12px;
    }
    .price-card.featured .price-name {
        color: #fff;
    }
    .price-card .price-amount {
        font-family: var(--font-num);
        font-size: 42px;
        font-weight: 800;
        color: var(--text-dark);
        line-height: 1.1;
        margin-bottom: 24px;
    }
    .price-card.featured .price-amount {
        color: var(--accent);
    }
    .price-card .price-desc {
        font-size: 14px;
        color: var(--text-muted);
        margin-bottom: 24px;
    }
    .price-card.featured .price-desc {
        color: rgba(255, 255, 255, .6);
    }
    .price-features {
        margin-bottom: 32px;
    }
    .price-features li {
        display: flex;
        align-items: flex-start;
        gap: 10px;
        font-size: 14px;
        color: var(--text-body);
        padding: 6px 0;
    }
    .price-card.featured .price-features li {
        color: rgba(255, 255, 255, .85);
    }
    .price-features li i {
        color: var(--accent);
        margin-top: 5px;
        font-size: 14px;
    }
    .featured-badge {
        position: absolute;
        top: -16px;
        left: 50%;
        transform: translateX(-50%);
        background: var(--accent-grad);
        color: var(--text-dark);
        font-size: 13px;
        font-weight: 700;
        padding: 6px 20px;
        border-radius: 30px;
        box-shadow: 0 4px 12px rgba(233, 163, 56, .4);
    }

    /* ========== 最新资讯 ========== */
    .news-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
        margin-top: 48px;
    }
    .news-card {
        display: flex;
        background: #fff;
        border-radius: var(--radius-md);
        overflow: hidden;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
    }
    .news-card:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-3px);
        border-color: rgba(233, 163, 56, .4);
    }
    .news-thumb {
        width: 160px;
        min-height: 120px;
        flex-shrink: 0;
        background: var(--bg-light);
        overflow: hidden;
    }
    .news-thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .news-thumb-placeholder {
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, #E9EEF1, #F3F7F9);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-muted);
        font-size: 24px;
    }
    .news-body {
        padding: 16px 20px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .news-body h3 {
        font-size: 17px;
        font-weight: 700;
        color: var(--text-dark);
        line-height: 1.4;
        margin-bottom: 8px;
        display: -webkit-box;
        -webkit-line-clamp: 1;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-body p {
        font-size: 14px;
        color: var(--text-body);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 12px;
        flex: 1;
    }
    .news-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 13px;
        color: var(--text-muted);
    }
    .news-meta .news-cat {
        background: var(--bg-light);
        padding: 2px 10px;
        border-radius: 20px;
        font-weight: 600;
        color: var(--text-body);
        font-size: 12px;
    }
    .section-more {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 14px;
        font-weight: 600;
        color: var(--accent-dark);
        transition: var(--transition);
    }
    .section-more:hover {
        gap: 10px;
        color: var(--accent-dark);
    }

    /* ========== FAQ ========== */
    .faq-grid {
        max-width: 860px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }
    .faq-item {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        padding: 24px 28px;
        transition: var(--transition);
    }
    .faq-item:hover {
        border-color: rgba(233, 163, 56, .4);
    }
    .faq-q {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        font-size: 16px;
        font-weight: 600;
        color: var(--text-dark);
        cursor: pointer;
        user-select: none;
    }
    .faq-q .faq-icon {
        width: 32px;
        height: 32px;
        border-radius: 50%;
        background: var(--bg-light);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        color: var(--accent-dark);
        transition: transform .3s ease;
        flex-shrink: 0;
    }
    .faq-item.open .faq-icon {
        transform: rotate(45deg);
        background: rgba(233, 163, 56, .15);
    }
    .faq-a {
        max-height: 0;
        overflow: hidden;
        transition: max-height .35s ease, padding .3s ease;
        font-size: 14px;
        line-height: 1.75;
        color: var(--text-body);
        padding-top: 0;
    }
    .faq-item.open .faq-a {
        max-height: 300px;
        padding-top: 16px;
    }

    /* ========== 结尾 CTA ========== */
    .cta-band {
        background: var(--primary);
        border-radius: var(--radius-lg);
        padding: 56px 64px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 40px;
        position: relative;
        overflow: hidden;
        margin: 96px 0 64px;
    }
    .cta-band::before {
        content: '';
        position: absolute;
        right: -60px;
        top: -60px;
        width: 240px;
        height: 240px;
        border-radius: 50%;
        background: rgba(233, 163, 56, .08);
    }
    .cta-band h2 {
        font-size: 28px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 8px;
        line-height: 1.3;
    }
    .cta-band p {
        color: rgba(255, 255, 255, .7);
        font-size: 15px;
    }
    .cta-band .btn {
        position: relative;
        z-index: 2;
        flex-shrink: 0;
    }

    /* ========== Footer ========== */
    .site-footer {
        background: var(--primary);
        color: rgba(255, 255, 255, .75);
        padding-top: 64px;
        margin-top: 96px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.2fr;
        gap: 48px;
        padding-bottom: 48px;
    }
    .footer-brand .footer-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 16px;
    }
    .footer-brand .footer-logo .logo-icon {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    .footer-brand .footer-logo .logo-text {
        color: #fff;
        font-size: 17px;
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.7;
        max-width: 240px;
        color: rgba(255, 255, 255, .65);
    }
    .footer-col h4 {
        font-size: 15px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 20px;
    }
    .footer-col ul li {
        margin-bottom: 10px;
    }
    .footer-col ul a {
        font-size: 14px;
        color: rgba(255, 255, 255, .65);
        transition: var(--transition);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .footer-col ul a:hover {
        color: var(--accent);
        padding-left: 4px;
    }
    .footer-col .contact-info li {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        color: rgba(255, 255, 255, .65);
        margin-bottom: 12px;
    }
    .footer-col .contact-info i {
        width: 18px;
        color: var(--accent);
        text-align: center;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, .1);
        padding: 20px 0;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        flex-wrap: wrap;
        font-size: 13px;
        color: rgba(255, 255, 255, .5);
    }

    /* ========== 空态 ========== */
    .empty-state {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 64px 24px;
        color: var(--text-muted);
        font-size: 15px;
        text-align: center;
        border: 1px dashed var(--border);
        border-radius: var(--radius-md);
        grid-column: 1 / -1;
    }
    .empty-state i {
        font-size: 32px;
        margin-bottom: 12px;
        color: #C0CBD1;
    }

    /* ========== 响应式 ========== */
    @media (max-width: 1024px) {
        .section {
            padding: 72px 0;
        }
        .values-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .features-wrap {
            grid-template-columns: 240px 1fr;
            gap: 32px;
        }
        .stats-grid {
            gap: 24px;
        }
        .pricing-grid {
            gap: 16px;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
        .main-nav .nav-link {
            padding: 8px 10px;
            font-size: 14px;
        }
        .search-box input {
            width: 140px;
        }
        .search-box input:focus {
            width: 180px;
        }
    }
    @media (max-width: 768px) {
        .site-header {
            height: 64px;
        }
        .main-nav,
        .search-box {
            display: none;
        }
        .hamburger {
            display: flex;
        }
        .header-actions .btn {
            padding: 8px 14px;
            font-size: 13px;
        }
        .hero {
            min-height: 560px;
        }
        .hero h1 {
            font-size: 34px;
        }
        .hero-sub {
            font-size: 16px;
        }
        .hero-ctas .btn {
            width: 100%;
        }
        .hero-trust {
            gap: 16px;
        }
        .hero-trust span {
            font-size: 13px;
        }
        .section-title {
            font-size: 26px;
        }
        .values-grid {
            grid-template-columns: 1fr;
        }
        .features-wrap {
            grid-template-columns: 1fr;
        }
        .features-tabs {
            flex-direction: row;
            overflow-x: auto;
            padding-bottom: 8px;
            gap: 8px;
        }
        .feature-tab {
            white-space: nowrap;
            width: auto;
            flex-shrink: 0;
            border-left: 1px solid var(--border);
            padding: 12px 16px;
        }
        .feature-tab.active {
            border-left: 1px solid var(--accent);
        }
        .feature-tab i {
            display: none;
        }
        .features-panel {
            padding: 24px;
        }
        .scenario-grid {
            grid-template-columns: 1fr;
        }
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 32px 16px;
        }
        .stat-item .stat-num {
            font-size: 32px;
        }
        .pricing-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .price-card.featured {
            transform: none;
            padding: 48px 32px;
        }
        .news-grid {
            grid-template-columns: 1fr;
        }
        .news-card {
            flex-direction: column;
        }
        .news-thumb {
            width: 100%;
            height: 160px;
        }
        .cta-band {
            flex-direction: column;
            padding: 40px 28px;
            text-align: center;
        }
        .cta-band .btn {
            width: 100%;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
        .logo-wall {
            gap: 24px;
        }
        .brand-wordmark {
            font-size: 18px;
        }
    }
    @media (max-width: 520px) {
        .container {
            padding: 0 16px;
        }
        .header-actions .btn {
            display: none;
        }
        .hamburger {
            display: flex;
        }
        .hero-ctas {
            flex-direction: column;
        }
        .hero-trust {
            flex-direction: column;
            align-items: flex-start;
            gap: 10px;
        }
        .section {
            padding: 56px 0;
        }
        .stats-grid {
            grid-template-columns: 1fr 1fr;
        }
        .news-meta {
            flex-wrap: wrap;
        }
    }

/* roulang page: article */
:root {
            --c-primary: #0D2530;
            --c-primary-light: #16343F;
            --c-accent: #E9A338;
            --c-accent-dark: #D78B24;
            --c-accent-grad: linear-gradient(135deg, #F7C65A 0%, #E49A2A 100%);
            --c-bg: #FFFFFF;
            --c-bg-alt: #F3F7F9;
            --c-title: #15262F;
            --c-body: #51656F;
            --c-muted: #8B9AA3;
            --c-border: #E3E9ED;
            --c-success: #1D9E5A;
            --r-sm: 6px;
            --r-md: 12px;
            --r-lg: 20px;
            --s-sm: 0 1px 3px rgba(13, 37, 48, 0.06);
            --s-md: 0 6px 16px rgba(13, 37, 48, 0.08);
            --s-lg: 0 12px 24px rgba(13, 37, 48, 0.12);
            --f-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
            --f-num: "Inter", "DIN Alternate", sans-serif;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--f-cn);
            font-size: 15px;
            line-height: 1.75;
            color: var(--c-body);
            background: var(--c-bg);
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== Header ========== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--c-border);
            box-shadow: 0 0.5px 0 rgba(13, 37, 48, 0.04);
            position: sticky;
            top: 0;
            z-index: 100;
            height: 72px;
        }
        .header-inner {
            height: 72px;
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--c-primary);
            color: var(--c-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            letter-spacing: -0.02em;
            font-family: var(--f-num);
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 16px;
            font-weight: 800;
            color: var(--c-title);
            white-space: nowrap;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 2px;
            margin-left: auto;
        }
        .nav-link {
            display: block;
            padding: 10px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--c-body);
            border-radius: var(--r-sm);
            transition: color .2s ease, background .2s ease;
            position: relative;
            white-space: nowrap;
            line-height: 1.4;
        }
        .nav-link:hover {
            color: var(--c-primary);
            background: rgba(13, 37, 48, 0.03);
        }
        .nav-link.active {
            color: var(--c-primary);
            font-weight: 700;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 3px;
            border-radius: 3px 3px 0 0;
            background: var(--c-accent);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--c-bg-alt);
            border: 1px solid var(--c-border);
            border-radius: 10px;
            padding: 0 12px;
            height: 40px;
            width: 160px;
            transition: width .25s ease, border-color .2s ease, box-shadow .2s ease;
        }
        .search-box i {
            color: var(--c-muted);
            font-size: 13px;
            margin-right: 8px;
            flex-shrink: 0;
        }
        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            color: var(--c-title);
            width: 100%;
        }
        .search-box input::placeholder { color: var(--c-muted); }
        .search-box:focus-within {
            width: 200px;
            border-color: var(--c-accent);
            box-shadow: 0 0 0 3px rgba(233, 163, 56, 0.2);
            background: #fff;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            height: 44px;
            padding: 0 22px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: all .2s ease;
            white-space: nowrap;
            line-height: 1;
        }
        .btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(233, 163, 56, 0.4);
        }
        .btn:active { transform: scale(0.98); }
        .btn-accent {
            background: var(--c-accent-grad);
            color: #1F2018;
            box-shadow: 0 2px 8px rgba(233, 163, 56, 0.3);
        }
        .btn-accent:hover {
            filter: brightness(1.08);
            box-shadow: 0 6px 16px rgba(233, 163, 56, 0.4);
            transform: translateY(-1px);
        }
        .btn-accent:active { transform: scale(0.98); }
        .btn-light {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.5);
            backdrop-filter: blur(4px);
        }
        .btn-light:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--c-primary);
            border: 1px solid var(--c-border);
        }
        .btn-outline:hover {
            border-color: var(--c-accent);
            color: var(--c-accent-dark);
            background: rgba(233, 163, 56, 0.04);
        }
        .btn-block { width: 100%; }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            cursor: pointer;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--c-title);
            border-radius: 2px;
            transition: all .3s ease;
        }
        .mobile-panel {
            display: none;
            background: #fff;
            border-bottom: 1px solid var(--c-border);
            padding: 16px 0 24px;
            box-shadow: var(--s-md);
        }
        .mobile-panel.open { display: block; }
        .mobile-search {
            display: flex;
            align-items: center;
            background: var(--c-bg-alt);
            border: 1px solid var(--c-border);
            border-radius: 10px;
            padding: 0 12px;
            height: 44px;
            margin-bottom: 12px;
        }
        .mobile-search i { color: var(--c-muted); margin-right: 8px; font-size: 13px; }
        .mobile-search input { border: none; outline: none; background: transparent; width: 100%; font-size: 14px; color: var(--c-title); }
        .mobile-nav { display: flex; flex-direction: column; gap: 4px; }
        .mobile-nav .nav-link {
            padding: 12px 14px;
            font-size: 15px;
            border-radius: 8px;
        }
        .mobile-nav .nav-link.active {
            background: rgba(233, 163, 56, 0.08);
            color: var(--c-accent-dark);
        }
        .mobile-nav .nav-link.active::after { display: none; }

        /* ========== Breadcrumb ========== */
        .breadcrumb-wrap {
            background: #F8FAFB;
            border-bottom: 1px solid var(--c-border);
            padding: 14px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--c-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--c-muted); transition: color .2s ease; }
        .breadcrumb a:hover { color: var(--c-accent-dark); }
        .breadcrumb .sep { color: #C6D0D6; }
        .breadcrumb .current {
            color: var(--c-body);
            max-width: 400px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ========== Article Main ========== */
        .article-main {
            padding: 48px 0 64px;
            background: #fff;
        }
        .article-header {
            max-width: 720px;
            margin: 0 auto 24px;
            padding-bottom: 28px;
            border-bottom: 1px solid var(--c-border);
        }
        .article-title {
            font-size: 36px;
            line-height: 1.3;
            font-weight: 800;
            color: var(--c-title);
            letter-spacing: -0.01em;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--c-muted);
        }
        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .meta-item i { font-size: 13px; color: var(--c-accent); }
        .meta-item .cat-tag {
            display: inline-block;
            background: rgba(233, 163, 56, 0.1);
            color: var(--c-accent-dark);
            padding: 2px 10px;
            border-radius: var(--r-sm);
            font-size: 12px;
            font-weight: 600;
        }

        /* Article body */
        .article-content {
            max-width: 720px;
            margin: 0 auto;
            font-size: 17px;
            line-height: 1.9;
            color: var(--c-body);
        }
        .article-content p {
            margin-bottom: 16px;
            color: var(--c-body);
        }
        .article-content h1,
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            color: var(--c-title);
            font-weight: 700;
            margin-top: 36px;
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .article-content h1 { font-size: 30px; }
        .article-content h2 { font-size: 28px; }
        .article-content h3 { font-size: 22px; }
        .article-content h4 { font-size: 18px; }
        .article-content img {
            border-radius: var(--r-md);
            margin: 24px 0;
            box-shadow: var(--s-sm);
        }
        .article-content blockquote {
            border-left: 4px solid var(--c-accent);
            background: #FBF8F2;
            padding: 16px 20px;
            margin: 24px 0;
            border-radius: 0 var(--r-md) var(--r-md) 0;
            color: var(--c-body);
            font-style: normal;
        }
        .article-content ul,
        .article-content ol {
            margin: 16px 0;
            padding-left: 24px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content pre {
            background: #F1F4F6;
            border-radius: var(--r-md);
            padding: 16px 20px;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
            font-size: 13px;
            line-height: 1.7;
            overflow-x: auto;
            margin: 24px 0;
            color: var(--c-title);
        }
        .article-content code {
            font-family: "SFMono-Regular", Consolas, monospace;
            font-size: 13px;
            background: #F1F4F6;
            padding: 2px 6px;
            border-radius: 4px;
            color: var(--c-primary);
        }
        .article-content pre code { background: none; padding: 0; }
        .article-content figure {
            margin: 24px 0;
        }
        .article-content figcaption {
            font-size: 13px;
            color: var(--c-muted);
            text-align: center;
            margin-top: 8px;
        }
        .article-content a {
            color: var(--c-accent-dark);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color .2s ease;
        }
        .article-content a:hover { color: var(--c-accent); }

        /* Empty state */
        .article-empty {
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
            padding: 80px 24px;
            background: var(--c-bg-alt);
            border-radius: var(--r-lg);
        }
        .article-empty i {
            font-size: 48px;
            color: var(--c-muted);
            margin-bottom: 16px;
            display: block;
        }
        .article-empty .title {
            font-size: 20px;
            font-weight: 700;
            color: var(--c-title);
            margin-bottom: 8px;
        }
        .article-empty .desc {
            font-size: 14px;
            color: var(--c-muted);
            margin-bottom: 24px;
        }

        /* ========== Related Section ========== */
        .related-section {
            background: var(--c-bg-alt);
            padding: 64px 0;
        }
        .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--c-title);
            line-height: 1.3;
            position: relative;
            padding-left: 16px;
        }
        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 22px;
            border-radius: 4px;
            background: var(--c-accent);
        }
        .section-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--c-accent-dark);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .2s ease, color .2s ease;
        }
        .section-more:hover { gap: 10px; color: var(--c-accent); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: #fff;
            border-radius: var(--r-md);
            border: 1px solid var(--c-border);
            overflow: hidden;
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--s-lg);
            border-color: transparent;
        }
        .related-card-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #E8EEF1;
        }
        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .related-card:hover .related-card-img img { transform: scale(1.04); }
        .related-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .related-card-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-title);
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color .2s ease;
        }
        .related-card:hover .related-card-body h3 { color: var(--c-accent-dark); }
        .related-card-meta {
            font-size: 13px;
            color: var(--c-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: auto;
        }
        .related-card-meta i { font-size: 12px; }

        /* ========== CTA Band ========== */
        .cta-band-wrap {
            padding: 64px 0;
            background: #fff;
        }
        .cta-band {
            background: var(--c-primary);
            border-radius: var(--r-lg);
            padding: 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }
        .cta-band::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--c-accent-grad);
        }
        .cta-band-text h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .cta-band-text p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 15px;
        }
        .cta-band .btn { flex-shrink: 0; }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--c-primary);
            color: rgba(255, 255, 255, 0.7);
            padding-top: 64px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .footer-logo .logo-icon {
            width: 40px;
            height: 40px;
            font-size: 15px;
            border-radius: 10px;
        }
        .footer-logo .logo-text {
            color: #fff;
            font-size: 16px;
            font-weight: 800;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            max-width: 260px;
            line-height: 1.6;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            transition: color .2s ease;
        }
        .footer-col ul li a:hover { color: var(--c-accent); }
        .contact-info li {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .contact-info li i {
            color: var(--c-accent);
            font-size: 13px;
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .main-nav { display: none; }
            .search-box { display: none; }
            .nav-toggle { display: flex; }
            .header-actions .btn { display: none; }
            .header-inner { gap: 12px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            .site-header { height: 64px; }
            .header-inner { height: 64px; }
            .logo-icon { width: 40px; height: 40px; font-size: 15px; }
            .article-title { font-size: 28px; }
            .article-content { font-size: 16px; }
            .cta-band { padding: 32px 24px; }
            .cta-band-text h2 { font-size: 22px; }
            .related-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 640px) {
            .container { padding: 0 16px; }
            .logo-text { font-size: 15px; }
            .breadcrumb .current { max-width: 180px; }
            .article-main { padding: 32px 0 48px; }
            .article-header { padding-bottom: 20px; }
            .article-meta { gap: 10px; }
            .related-section { padding: 48px 0; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-band { flex-direction: column; align-items: flex-start; }
            .cta-band .btn { width: 100%; }
            .section-title { font-size: 22px; }
            .mobile-panel .container { padding: 0 16px; }
        }

/* roulang page: category1 */
:root {
  --primary: #0D2530;
  --primary-deep: #091B24;
  --accent: #E9A338;
  --accent-hover: #D78B24;
  --accent-grad: linear-gradient(135deg, #F7C65A 0%, #E49A2A 100%);
  --white: #FFFFFF;
  --light-bg: #F3F7F9;
  --text-dark: #15262F;
  --text-body: #51656F;
  --text-muted: #8B9AA3;
  --border: #E3E9ED;
  --green: #1D9E5A;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(13,37,48,.06);
  --shadow-hover: 0 12px 24px rgba(13,37,48,.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  color: var(--text-body);
  background: var(--white);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .25s; }
ul, ol { list-style: none; }
button { font-family: inherit; }

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

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 600; border-radius: 10px; cursor: pointer;
  transition: all .25s; border: none; min-height: 44px;
  padding: 0 24px; font-size: 15px; line-height: 1; gap: 8px;
}
.btn-primary {
  background: var(--accent-grad);
  color: var(--text-dark);
  box-shadow: 0 4px 12px rgba(233,163,56,.35);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #F7C65A, #D78B24);
  box-shadow: 0 8px 20px rgba(233,163,56,.45);
  transform: translateY(-1px);
}
.btn-primary:active { transform: scale(.98); }
.btn-outline {
  background: transparent; border: 1px solid rgba(255,255,255,.85); color: #fff;
}
.btn-outline:hover { background: rgba(255,255,255,.12); }
.btn-outline-dark {
  background: var(--white); border: 1px solid var(--border); color: var(--text-dark);
}
.btn-outline-dark:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { min-height: 40px; padding: 0 18px; font-size: 14px; }
.btn-lg { min-height: 52px; padding: 0 36px; font-size: 16px; }
.btn-block { width: 100%; margin-top: 16px; }
.btn:focus-visible, .nav-link:focus-visible, .faq-question:focus-visible, .search-box:focus-within {
  outline: 3px solid rgba(233,163,56,.4); outline-offset: 2px;
}

/* ============ 顶部导航 ============ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.98);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 .5px 0 rgba(13,37,48,.06);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-icon {
  width: 44px; height: 44px; border-radius: 10px; background: var(--primary);
  color: var(--accent); font-weight: 800; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  font-family: "Inter", "DIN Alternate", sans-serif;
  letter-spacing: .01em;
}
.logo-text { font-size: 17px; font-weight: 800; color: var(--text-dark); letter-spacing: .01em; white-space: nowrap; }
.main-nav { display: flex; align-items: center; gap: 28px; margin-left: 16px; }
.nav-link {
  position: relative; font-size: 15px; color: var(--text-body);
  padding: 10px 0; font-weight: 500;
}
.nav-link:hover { color: var(--text-dark); }
.nav-link.active { color: var(--text-dark); font-weight: 700; }
.nav-link.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 3px; border-radius: 3px; background: var(--accent);
}
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.search-box {
  display: flex; align-items: center; gap: 8px;
  border: 1px solid var(--border); border-radius: 10px;
  padding: 0 14px; height: 42px; width: 180px;
  background: var(--white); transition: all .25s;
}
.search-box:focus-within { width: 200px; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(233,163,56,.2); }
.search-box i { color: var(--text-muted); font-size: 14px; flex-shrink: 0; }
.search-box input {
  border: none; outline: none; background: transparent;
  font-size: 14px; width: 100%; color: var(--text-dark);
}
.search-box input::placeholder { color: var(--text-muted); }

.menu-toggle {
  display: none; width: 44px; height: 44px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--white);
  color: var(--text-dark); font-size: 18px; cursor: pointer;
  align-items: center; justify-content: center; margin-left: auto;
}
.menu-toggle:hover { border-color: var(--accent); color: var(--accent); }

.mobile-panel { display: none; border-top: 1px solid var(--border); padding: 16px 24px 20px; background: var(--white); }
.mobile-panel.open { display: block; }
.mobile-nav { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav .nav-link { padding: 12px 0; border-bottom: 1px solid var(--border); display: block; }
.mobile-nav .nav-link:last-child { border-bottom: none; }
.mobile-nav .nav-link.active { color: var(--accent); font-weight: 700; }
.mobile-nav .nav-link.active::after { display: none; }
.mobile-panel .search-box { width: 100%; margin-top: 14px; }
.mobile-panel .btn { width: 100%; margin-top: 14px; }

/* ============ 通用区块 ============ */
.section { padding: 88px 0; }
.section.bg-light { background: var(--light-bg); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.section-tag {
  display: inline-block; font-size: 13px; font-weight: 600;
  color: var(--accent); background: rgba(233,163,56,.1);
  padding: 6px 14px; border-radius: 6px; margin-bottom: 12px;
}
.section-title { font-size: 30px; font-weight: 700; color: var(--text-dark); margin-bottom: 12px; letter-spacing: -.01em; }
.section-desc { font-size: 15px; color: var(--text-body); }

/* ============ 分类页头 ============ */
.category-hero {
  position: relative; padding: 68px 0 64px;
  background: var(--light-bg); overflow: hidden;
}
.category-hero-bg {
  position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  opacity: .12;
}
.category-hero-inner { position: relative; z-index: 1; text-align: center; max-width: 760px; margin: 0 auto; }
.category-hero-title {
  font-size: 34px; font-weight: 800; color: var(--text-dark);
  letter-spacing: -.01em; line-height: 1.3;
}
.category-hero-desc { margin-top: 14px; font-size: 16px; color: var(--text-body); line-height: 1.8; }

/* ============ 版本下载卡阵 ============ */
.version-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.version-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-md); overflow: hidden;
  box-shadow: var(--shadow-sm); transition: all .3s ease;
  display: flex; flex-direction: column;
}
.version-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.version-card-img { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.version-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.version-card:hover .version-card-img img { transform: scale(1.03); }
.badge {
  position: absolute; top: 12px; right: 12px;
  padding: 4px 10px; border-radius: var(--radius-sm);
  font-size: 12px; font-weight: 600; line-height: 1.4;
}
.badge-hot { background: var(--accent); color: var(--text-dark); }
.badge-new { background: var(--green); color: #fff; }
.version-card-body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.version-name { font-size: 18px; font-weight: 700; color: var(--text-dark); }
.version-num {
  margin-top: 4px; font-size: 14px; color: var(--accent);
  font-weight: 600; font-family: "Inter", "DIN Alternate", sans-serif;
}
.version-meta { margin-top: 12px; }
.version-meta li { font-size: 13px; color: var(--text-muted); padding: 3px 0; display: flex; align-items: center; gap: 8px; }
.version-meta li::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent); flex-shrink: 0;
}
.version-card .btn { margin-top: auto; }

/* ============ 选择提醒横条 ============ */
.tip-section { background: var(--light-bg); padding: 64px 0; }
.tip-strip {
  background: var(--primary); border-radius: 14px;
  padding: 28px 36px;
  display: flex; align-items: center; justify-content: space-around;
  gap: 28px; flex-wrap: wrap;
}
.tip-item { display: flex; align-items: center; gap: 14px; color: #fff; }
.tip-item i {
  width: 42px; height: 42px; border-radius: 10px; flex-shrink: 0;
  background: rgba(233,163,56,.15); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-size: 16px;
}
.tip-item span { font-size: 15px; font-weight: 500; }

/* ============ 下载流程 ============ */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.process-step {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 28px 24px;
  box-shadow: var(--shadow-sm); transition: all .3s;
}
.process-step:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.step-num {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--accent-grad); color: var(--text-dark);
  font-weight: 800; display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-family: "Inter", sans-serif; margin-bottom: 16px;
}
.process-step h3 { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.process-step p { font-size: 14px; color: var(--text-muted); line-height: 1.75; }

/* ============ FAQ ============ */
.faq-section { background: var(--light-bg); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-md); margin-bottom: 14px;
  overflow: hidden; box-shadow: var(--shadow-sm); transition: box-shadow .3s;
}
.faq-item:hover { box-shadow: var(--shadow-hover); }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  text-align: left; padding: 20px 24px; background: none; border: none;
  cursor: pointer; font-size: 15px; font-weight: 600; color: var(--text-dark);
  min-height: 56px; gap: 16px;
}
.faq-question i { color: var(--accent); font-size: 14px; transition: transform .3s; flex-shrink: 0; }
.faq-item.active .faq-question i { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-answer p { padding: 0 24px 20px; font-size: 14px; color: var(--text-body); line-height: 1.75; }

/* ============ 结尾 CTA ============ */
.cta-section { padding: 64px 0 88px; }
.cta-box {
  background: var(--primary); border-radius: var(--radius-lg);
  padding: 48px; display: flex; align-items: center;
  justify-content: space-between; gap: 32px; flex-wrap: wrap;
}
.cta-text h2 { color: #fff; font-size: 28px; font-weight: 700; letter-spacing: -.01em; }
.cta-text p { color: rgba(255,255,255,.7); margin-top: 8px; font-size: 15px; }

/* ============ 页脚 ============ */
.site-footer { background: var(--primary); color: rgba(255,255,255,.72); padding: 64px 0 0; font-size: 14px; }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px; padding-bottom: 40px;
}
.footer-logo { display: flex; align-items: center; gap: 12px; }
.footer-logo .logo-text { color: #fff; font-size: 18px; }
.footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.6); }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: rgba(255,255,255,.66); transition: color .25s; }
.footer-col a:hover { color: var(--accent); }
.contact-info li { color: rgba(255,255,255,.66); display: flex; align-items: center; gap: 10px; }
.contact-info i { color: var(--accent); width: 16px; text-align: center; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0; display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 8px; color: rgba(255,255,255,.5); font-size: 13px;
}

/* ============ 响应式 ============ */
@media (min-width: 1025px) {
  .version-card:nth-child(4) { margin-top: -16px; }
}
@media (max-width: 1024px) {
  .main-nav { display: none; }
  .header-actions .search-box { display: none; }
  .menu-toggle { display: flex; }
  .header-inner { height: 64px; gap: 16px; }
  .header-actions { margin-left: auto; }
  .version-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 72px 0; }
}
@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .section { padding: 64px 0; }
  .section-title { font-size: 26px; }
  .category-hero { padding: 52px 0 48px; }
  .category-hero-title { font-size: 32px; }
  .category-hero-desc { font-size: 15px; }
  .version-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .tip-strip { padding: 24px 20px; flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-box { padding: 32px 24px; flex-direction: column; text-align: center; }
  .cta-text h2 { font-size: 24px; }
  .header-actions .btn-sm { padding: 0 14px; font-size: 13px; }
  .logo-text { font-size: 15px; }
}

/* roulang page: category2 */
:root {
  --primary: #0D2530;
  --accent: #E9A338;
  --accent-hover: #D78B24;
  --accent-grad: linear-gradient(135deg, #F7C65A, #E49A2A);
  --bg-white: #FFFFFF;
  --bg-light: #F3F7F9;
  --text-title: #15262F;
  --text-body: #51656F;
  --text-muted: #8B9AA3;
  --success: #1D9E5A;
  --border: #E3E9ED;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(13,37,48,.06);
  --shadow-hover: 0 12px 24px rgba(13,37,48,.12);
  --transition: all .25s ease;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,sans-serif; background:#fff; color:var(--text-body); font-size:15px; line-height:1.75; -webkit-font-smoothing:antialiased; }
img { max-width:100%; display:block; }
a { text-decoration:none; color:inherit; transition:var(--transition); }
button { cursor:pointer; font-family:inherit; }
input,button { outline:none; border:none; }
ul,ol { list-style:none; }
h1,h2,h3,h4,h5,h6 { font-weight:700; color:var(--text-title); line-height:1.4; }
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
section { padding:96px 0; position:relative; }
@media (max-width:768px){
  section { padding:64px 0; }
  .container { padding:0 20px; }
}

/* Header */
.site-header {
  position:sticky; top:0; z-index:100;
  background:#fff; height:72px;
  border-bottom:1px solid var(--border);
  box-shadow:0 .5px 4px rgba(13,37,48,.04);
}
.header-inner { display:flex; align-items:center; justify-content:space-between; height:100%; }
.logo { display:flex; align-items:center; gap:10px; }
.logo-icon {
  width:40px; height:40px; border-radius:10px;
  background:var(--primary); color:var(--accent);
  display:flex; align-items:center; justify-content:center;
  font-weight:800; font-size:15px; letter-spacing:.02em;
  flex-shrink:0;
}
.logo-text { font-size:16px; font-weight:800; color:var(--text-title); letter-spacing:-.01em; }
.main-nav { display:flex; align-items:center; gap:28px; }
.nav-link {
  font-size:14px; font-weight:500; color:var(--text-body); position:relative; padding:0 2px 8px;
  transition:var(--transition);
}
.nav-link:hover { color:var(--text-title); }
.nav-link.active { color:var(--text-title); font-weight:700; }
.nav-link.active::after {
  content:''; position:absolute; left:0; bottom:0; width:100%; height:3px;
  background:var(--accent); border-radius:2px;
}
.header-actions { display:flex; align-items:center; gap:14px; }
.search-box { position:relative; width:160px; transition:var(--transition); }
.search-box input {
  width:100%; padding:8px 12px 8px 34px;
  border:1px solid var(--border); border-radius:10px;
  font-size:14px; transition:var(--transition);
}
.search-box input:focus { width:200px; border-color:var(--accent); box-shadow:0 0 0 2px rgba(233,163,56,.2); }
.search-box i { position:absolute; left:12px; top:50%; transform:translateY(-50%); color:var(--text-muted); font-size:14px; }
.hamburger-btn { display:none; width:44px; height:44px; align-items:center; justify-content:center; background:transparent; font-size:20px; color:var(--text-title); border-radius:8px; }
.hamburger-btn:hover { background:var(--bg-light); }
.mobile-menu { display:none; background:#fff; border-bottom:1px solid var(--border); padding:12px 24px 20px; }
.mobile-menu.open { display:block; }
.mobile-link { display:block; padding:10px 0; font-size:15px; color:var(--text-body); border-bottom:1px solid #f0f3f6; }
.mobile-link.active { color:var(--accent); font-weight:700; }
.mobile-search { margin-top:14px; }
.mobile-search input { width:100%; padding:10px 14px; border:1px solid var(--border); border-radius:10px; font-size:14px; }

/* Buttons */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:6px;
  padding:10px 24px; border-radius:10px; font-size:14px; font-weight:700;
  transition:var(--transition); min-height:44px; white-space:nowrap;
}
.btn-accent {
  background:var(--accent-grad); color:var(--primary);
  box-shadow:0 2px 8px rgba(233,163,56,.25);
}
.btn-accent:hover { filter:brightness(1.08); box-shadow:0 6px 18px rgba(233,163,56,.35); transform:translateY(-1px); }
.btn-accent:active { transform:scale(.98); }
.btn-lg { padding:14px 36px; font-size:15px; }
.btn-outline { border:1.5px solid rgba(255,255,255,.85); color:#fff; background:transparent; }
.btn-outline:hover { background:rgba(255,255,255,.12); border-color:#fff; }
.btn-dark { background:var(--primary); color:#fff; }
.btn-dark:hover { background:#173a4a; transform:translateY(-1px); box-shadow:var(--shadow-hover); }
.btn:focus-visible { outline:3px solid rgba(233,163,56,.45); outline-offset:2px; }

/* Page header */
.page-header {
  background:#fff; padding:64px 0 48px; text-align:center;
  border-bottom:1px solid #f0f3f6;
}
.page-header h1 { font-size:44px; font-weight:800; color:var(--text-title); letter-spacing:-.01em; }
.page-header p { max-width:560px; margin:16px auto 0; color:var(--text-body); font-size:15px; }
@media (max-width:768px){
  .page-header { padding:48px 0 36px; }
  .page-header h1 { font-size:32px; }
}

/* Download cards */
.download-section { background:var(--bg-light); }
.section-title-wrap { text-align:center; margin-bottom:48px; }
.section-tag { display:inline-block; padding:4px 14px; border-radius:var(--radius-sm); background:rgba(233,163,56,.12); color:var(--accent-hover); font-size:13px; font-weight:700; margin-bottom:14px; letter-spacing:.02em; }
.section-title { font-size:34px; font-weight:700; color:var(--text-title); }
.section-subtitle { max-width:620px; margin:14px auto 0; color:var(--text-body); font-size:15px; }
.download-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; align-items:start; }
.download-card {
  background:#fff; border-radius:var(--radius-md); overflow:hidden;
  box-shadow:var(--shadow-sm); border:1px solid var(--border);
  transition:var(--transition); display:flex; flex-direction:column;
}
.download-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-hover); border-color:transparent; }
.download-card .thumb-wrap { position:relative; aspect-ratio:16/10; overflow:hidden; background:var(--bg-light); }
.download-card .thumb-wrap img { width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
.download-card:hover .thumb-wrap img { transform:scale(1.04); }
.badge {
  position:absolute; top:12px; left:12px; z-index:2;
  padding:3px 10px; border-radius:var(--radius-sm); font-size:12px; font-weight:700;
  background:var(--success); color:#fff; box-shadow:0 2px 6px rgba(29,158,90,.3);
}
.badge-hot { background:var(--accent); color:var(--primary); box-shadow:0 2px 6px rgba(233,163,56,.4); }
.card-body { padding:20px 22px 22px; display:flex; flex-direction:column; flex:1; }
.card-body h3 { font-size:18px; font-weight:700; color:var(--text-title); margin-bottom:8px; }
.sys-line { display:flex; align-items:center; gap:8px; font-size:13px; color:var(--text-muted); margin-bottom:4px; }
.sys-line i { width:14px; font-size:12px; color:var(--accent); }
.card-desc { font-size:14px; color:var(--text-body); margin:10px 0 14px; }
.card-footer { display:flex; align-items:center; justify-content:space-between; margin-top:auto; }
.pkg-size { font-size:13px; color:var(--text-muted); }
.download-grid .offset-up { transform:translateY(-16px); }
.download-grid .offset-up:hover { transform:translateY(-20px); }
@media (max-width:1024px){
  .download-grid { grid-template-columns:repeat(2,1fr); }
  .download-grid .offset-up { transform:none; }
  .download-grid .offset-up:hover { transform:translateY(-4px); }
}
@media (max-width:640px){
  .download-grid { grid-template-columns:1fr; }
  .card-footer { flex-wrap:wrap; gap:10px; }
  .card-footer .btn { width:100%; }
}

/* Scene cards */
.scene-section { background:#fff; }
.scene-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.scene-card {
  display:flex; gap:20px; padding:28px; border-radius:var(--radius-md);
  border:1px solid var(--border); background:#fff;
  transition:var(--transition);
}
.scene-card:hover { box-shadow:var(--shadow-hover); transform:translateY(-4px); border-color:transparent; }
.scene-icon {
  width:52px; height:52px; border-radius:12px; flex-shrink:0;
  background:rgba(233,163,56,.12); color:var(--accent-hover);
  display:flex; align-items:center; justify-content:center; font-size:20px;
}
.scene-card h3 { font-size:18px; font-weight:700; color:var(--text-title); margin-bottom:6px; }
.scene-card p { font-size:14px; color:var(--text-body); line-height:1.7; }
@media (max-width:768px){
  .scene-grid { grid-template-columns:1fr; }
  .scene-card { padding:22px; flex-direction:column; gap:14px; }
}

/* Process */
.process-section { background:var(--bg-light); }
.process-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.process-step { text-align:center; padding:32px 20px; background:#fff; border-radius:var(--radius-md); box-shadow:var(--shadow-sm); transition:var(--transition); position:relative; }
.process-step:hover { box-shadow:var(--shadow-hover); transform:translateY(-4px); }
.step-num {
  width:36px; height:36px; border-radius:50%; margin:0 auto 16px;
  background:var(--primary); color:var(--accent);
  display:flex; align-items:center; justify-content:center;
  font-family:'Inter','DIN Alternate',sans-serif; font-size:16px; font-weight:800;
}
.process-step h3 { font-size:16px; font-weight:700; color:var(--text-title); margin-bottom:8px; }
.process-step p { font-size:13px; color:var(--text-muted); line-height:1.6; max-width:200px; margin:0 auto; }
@media (max-width:1024px){
  .process-grid { grid-template-columns:repeat(2,1fr); }
}
@media (max-width:640px){
  .process-grid { grid-template-columns:1fr; }
}

/* Security */
.security-section { background:#fff; }
.security-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.security-card { text-align:center; padding:36px 24px; border-radius:var(--radius-md); border:1px solid var(--border); background:#fff; transition:var(--transition); }
.security-card:hover { box-shadow:var(--shadow-hover); transform:translateY(-4px); }
.sec-icon {
  width:56px; height:56px; border-radius:50%; margin:0 auto 18px;
  background:rgba(29,158,90,.1); color:var(--success);
  display:flex; align-items:center; justify-content:center; font-size:22px;
}
.security-card h3 { font-size:17px; font-weight:700; color:var(--text-title); margin-bottom:8px; }
.security-card p { font-size:14px; color:var(--text-body); }
@media (max-width:768px){
  .security-grid { grid-template-columns:1fr; }
  .security-card { padding:28px 20px; }
}

/* FAQ */
.faq-section { background:var(--bg-light); }
.faq-wrap { max-width:860px; margin:0 auto; display:flex; flex-direction:column; gap:16px; }
.faq-item {
  background:#fff; border-radius:var(--radius-md); border:1px solid var(--border);
  overflow:hidden; transition:var(--transition);
}
.faq-item.open { box-shadow:var(--shadow-hover); border-color:transparent; }
.faq-question {
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  width:100%; padding:18px 22px; background:transparent;
  font-size:15px; font-weight:700; color:var(--text-title); text-align:left;
}
.faq-question:hover { background:#fafbfc; }
.faq-icon { width:28px; height:28px; flex-shrink:0; border-radius:6px; background:var(--bg-light); color:var(--accent-hover); display:flex; align-items:center; justify-content:center; font-size:16px; transition:transform .3s ease; }
.faq-item.open .faq-icon { transform:rotate(45deg); background:rgba(233,163,56,.15); }
.faq-answer { max-height:0; overflow:hidden; transition:max-height .35s ease; }
.faq-answer-inner { padding:0 22px 20px; font-size:14px; color:var(--text-body); line-height:1.75; border-top:1px dashed #edf0f3; padding-top:14px; }

/* CTA */
.cta-section { background:#fff; padding:56px 0; }
.cta-box {
  background:var(--primary); border-radius:var(--radius-lg); padding:48px 56px;
  display:flex; align-items:center; justify-content:space-between; gap:32px;
  box-shadow:0 16px 40px rgba(13,37,48,.2);
}
.cta-box h2 { color:#fff; font-size:28px; font-weight:800; }
.cta-box p { color:rgba(255,255,255,.7); font-size:14px; margin-top:8px; max-width:400px; }
@media (max-width:768px){
  .cta-box { flex-direction:column; text-align:center; padding:36px 24px; }
  .cta-box .btn { width:100%; }
}

/* Footer */
.site-footer { background:var(--primary); color:rgba(255,255,255,.7); padding-top:64px; }
.footer-grid { display:grid; grid-template-columns:1.4fr 1fr 1fr 1.2fr; gap:40px; padding-bottom:48px; }
.footer-brand .footer-logo { display:flex; align-items:center; gap:10px; margin-bottom:16px; }
.footer-brand .logo-icon { width:38px; height:38px; background:var(--accent); color:var(--primary); border-radius:10px; display:flex; align-items:center; justify-content:center; font-weight:800; }
.footer-brand .logo-text { color:#fff; font-size:16px; font-weight:800; }
.footer-brand p { font-size:14px; line-height:1.7; max-width:260px; }
.footer-col h4 { color:#fff; font-size:15px; font-weight:700; margin-bottom:16px; }
.footer-col li { margin-bottom:10px; }
.footer-col a { font-size:14px; color:rgba(255,255,255,.65); transition:var(--transition); }
.footer-col a:hover { color:var(--accent); }
.contact-info li { display:flex; align-items:center; gap:8px; font-size:14px; color:rgba(255,255,255,.65); }
.contact-info i { color:var(--accent); font-size:13px; width:16px; }
.footer-bottom { border-top:1px solid rgba(255,255,255,.1); padding:20px 0; display:flex; justify-content:space-between; flex-wrap:wrap; gap:8px; font-size:13px; color:rgba(255,255,255,.45); }
@media (max-width:1024px){
  .footer-grid { grid-template-columns:1fr 1fr; }
}
@media (max-width:640px){
  .footer-grid { grid-template-columns:1fr; gap:32px; }
  .footer-bottom { flex-direction:column; align-items:center; text-align:center; }
}

/* Responsive nav */
@media (max-width:1024px){
  .main-nav { display:none; }
  .header-actions .search-box { display:none; }
  .hamburger-btn { display:flex; }
  .mobile-menu { display:none; }
  .mobile-menu.open { display:block; }
}

/* roulang page: category3 */
:root {
            --ink-900: #0D2530;
            --ink-800: #102B38;
            --ink-700: #15262F;
            --ink-500: #51656F;
            --ink-300: #8B9AA3;
            --gold-600: #D78B24;
            --gold-500: #E9A338;
            --gold-400: #F7C65A;
            --bg-soft: #F3F7F9;
            --border-soft: #E3E9ED;
            --green-500: #1D9E5A;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(13,37,48,.06);
            --shadow-lg: 0 12px 24px rgba(13,37,48,.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            color: var(--ink-500);
            font-size: 15px;
            line-height: 1.75;
            background: #fff;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input {
            font-family: inherit;
        }

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

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: #fff;
            border-bottom: 1px solid var(--border-soft);
            box-shadow: var(--shadow-sm);
            height: 72px;
        }

        .header-inner {
            height: 72px;
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--ink-900);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gold-500);
            font-weight: 800;
            font-size: 16px;
            letter-spacing: .02em;
        }

        .logo-text {
            font-size: 18px;
            font-weight: 800;
            color: var(--ink-700);
            letter-spacing: -.01em;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: auto;
        }

        .nav-link {
            position: relative;
            padding: 26px 14px 24px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-500);
            transition: color .2s;
        }

        .nav-link:hover {
            color: var(--ink-700);
        }

        .nav-link.active {
            color: var(--ink-700);
            font-weight: 700;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 0;
            height: 3px;
            background: var(--gold-500);
            border-radius: 3px 3px 0 0;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-soft);
            border: 1px solid transparent;
            border-radius: 10px;
            padding: 0 14px;
            height: 44px;
            width: 160px;
            transition: all .3s;
            color: var(--ink-300);
        }

        .search-box:focus-within {
            width: 200px;
            border-color: var(--gold-500);
            box-shadow: 0 0 0 3px rgba(233, 163, 56, .2);
            background: #fff;
        }

        .search-box i {
            font-size: 14px;
        }

        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            color: var(--ink-700);
            width: 100%;
            height: 100%;
            margin-left: 8px;
        }

        .search-box input::placeholder {
            color: var(--ink-300);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 0;
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--ink-700);
            transition: all .3s;
            border-radius: 2px;
            margin-left: auto;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border-soft);
            box-shadow: var(--shadow-lg);
            padding: 16px 20px 24px;
            z-index: 49;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu a {
            padding: 14px 16px;
            border-radius: 10px;
            font-weight: 500;
            color: var(--ink-700);
        }

        .mobile-menu a:hover {
            background: var(--bg-soft);
        }

        .mobile-menu a.active {
            background: rgba(233, 163, 56, .12);
            color: var(--gold-600);
            font-weight: 700;
        }

        .mobile-menu .search-box {
            display: flex;
            width: 100%;
            margin-top: 12px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 22px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: all .25s;
            line-height: 1;
            white-space: nowrap;
        }

        .btn:active {
            transform: scale(.98);
        }

        .btn:focus-visible {
            outline: 3px solid rgba(233, 163, 56, .4);
            outline-offset: 2px;
        }

        .btn-gold {
            background: linear-gradient(135deg, var(--gold-400), var(--gold-500));
            color: var(--ink-900);
            box-shadow: 0 4px 14px rgba(233, 163, 56, .35);
        }

        .btn-gold:hover {
            filter: brightness(1.06);
            box-shadow: 0 8px 20px rgba(233, 163, 56, .45);
        }

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

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

        .btn-lg {
            height: 52px;
            padding: 0 32px;
            font-size: 16px;
            border-radius: 12px;
        }

        /* ===== Page Head ===== */
        .page-head {
            padding: 56px 0 40px;
            background: #fff;
            border-bottom: 1px solid var(--border-soft);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--ink-300);
            margin-bottom: 20px;
        }

        .breadcrumb a {
            color: var(--ink-500);
            transition: color .2s;
        }

        .breadcrumb a:hover {
            color: var(--gold-500);
        }

        .page-head h1 {
            font-size: 34px;
            font-weight: 800;
            color: var(--ink-700);
            letter-spacing: -.01em;
            line-height: 1.3;
        }

        .page-desc {
            margin-top: 12px;
            font-size: 15px;
            color: var(--ink-500);
            max-width: 680px;
            line-height: 1.8;
        }

        /* ===== Section ===== */
        .section {
            padding: 96px 0;
        }

        .section-head {
            margin-bottom: 48px;
            max-width: 640px;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 700;
            color: var(--ink-700);
            margin-top: 16px;
            letter-spacing: -.01em;
            line-height: 1.3;
        }

        .section-head p {
            margin-top: 12px;
            font-size: 15px;
            color: var(--ink-500);
            line-height: 1.8;
        }

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

        .section-head.light p {
            color: rgba(255, 255, 255, .72);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 700;
            color: var(--gold-600);
            background: rgba(233, 163, 56, .1);
            border: 1px solid rgba(233, 163, 56, .25);
            border-radius: 999px;
            padding: 5px 14px;
            letter-spacing: .02em;
        }

        .section-tag.gold {
            color: var(--gold-400);
            background: rgba(233, 163, 56, .12);
            border-color: rgba(233, 163, 56, .35);
        }

        /* ===== Feature Showcase ===== */
        .feature-showcase {
            padding: 96px 0;
            background: var(--bg-soft);
        }

        .showcase-grid {
            display: grid;
            grid-template-columns: 1.05fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .showcase-media img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            height: auto;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }

        .showcase-content h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--ink-700);
            margin: 16px 0;
            line-height: 1.35;
            letter-spacing: -.01em;
        }

        .showcase-content p {
            font-size: 15px;
            line-height: 1.85;
            color: var(--ink-500);
            margin-bottom: 14px;
        }

        .showcase-content .btn {
            margin-top: 12px;
        }

        /* ===== Capability ===== */
        .capability-section {
            padding: 96px 0;
            background: #fff;
        }

        .capability-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
        }

        .capability-card {
            background: #fff;
            border: 1px solid var(--border-soft);
            border-radius: 16px;
            padding: 14px 14px 32px;
            box-shadow: var(--shadow-sm);
            transition: transform .3s, box-shadow .3s, border-color .3s;
        }

        .capability-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(233, 163, 56, .4);
        }

        .capability-media {
            position: relative;
            border-radius: 12px;
            overflow: hidden;
            height: 140px;
        }

        .capability-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s;
        }

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

        .capability-icon {
            position: absolute;
            right: 14px;
            bottom: 14px;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--ink-900);
            color: var(--gold-500);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            box-shadow: var(--shadow-lg);
        }

        .capability-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--ink-700);
            margin: 22px 22px 0;
        }

        .capability-card p {
            margin: 10px 22px 0;
            font-size: 15px;
            line-height: 1.8;
            color: var(--ink-500);
        }

        .capability-card>a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin: 18px 22px 0;
            font-size: 14px;
            font-weight: 700;
            color: var(--gold-600);
            transition: gap .2s, color .2s;
        }

        .capability-card>a:hover {
            gap: 10px;
            color: var(--gold-500);
        }

        /* ===== Feature Detail ===== */
        .feature-detail {
            padding: 96px 0;
            background: var(--ink-900);
            position: relative;
            overflow: hidden;
        }

        .feature-detail::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            opacity: .08;
        }

        .feature-detail .container {
            position: relative;
            z-index: 1;
        }

        .feature-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .feature-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 12px;
            padding: 18px 24px;
            transition: background .3s, border-color .3s;
        }

        .feature-item:hover {
            background: rgba(255, 255, 255, .1);
            border-color: rgba(233, 163, 56, .4);
        }

        .feature-name {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .feature-name i {
            color: var(--gold-500);
            font-size: 14px;
            width: 18px;
            text-align: center;
        }

        .feature-tag {
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            padding: 4px 14px;
            background: rgba(255, 255, 255, .1);
            color: rgba(255, 255, 255, .8);
            white-space: nowrap;
        }

        .feature-tag.all {
            background: var(--green-500);
            color: #fff;
        }

        .feature-tag.pro {
            background: var(--gold-500);
            color: var(--ink-900);
        }

        .feature-tag.enterprise {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, .4);
            color: #fff;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 96px 0;
            background: var(--bg-soft);
        }

        .faq-grid {
            max-width: 860px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .faq-card {
            background: #fff;
            border: 1px solid var(--border-soft);
            border-radius: 12px;
            padding: 0 22px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s, border-color .3s;
        }

        .faq-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: rgba(233, 163, 56, .3);
        }

        .faq-card summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            padding: 20px 0;
            font-size: 15px;
            font-weight: 700;
            color: var(--ink-700);
            gap: 16px;
        }

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

        .faq-card summary::after {
            content: "+";
            font-size: 22px;
            font-weight: 400;
            color: var(--gold-500);
            transition: transform .3s;
            flex-shrink: 0;
            line-height: 1;
        }

        .faq-card[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-card p {
            padding: 0 0 20px;
            font-size: 14px;
            line-height: 1.75;
            color: var(--ink-500);
        }

        /* ===== Bottom CTA ===== */
        .bottom-cta {
            padding: 64px 0;
            background: #fff;
        }

        .cta-bar {
            background: var(--ink-900);
            border-radius: 20px;
            padding: 48px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            box-shadow: var(--shadow-lg);
        }

        .cta-text h2 {
            color: #fff;
            font-size: 26px;
            font-weight: 700;
            letter-spacing: -.01em;
        }

        .cta-text p {
            margin-top: 8px;
            color: rgba(255, 255, 255, .7);
            font-size: 15px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--ink-900);
            color: rgba(255, 255, 255, .72);
            padding: 72px 0 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .footer-logo .logo-icon {
            background: rgba(255, 255, 255, .1);
        }

        .footer-logo .logo-text {
            color: #fff;
            font-size: 18px;
            font-weight: 800;
        }

        .footer-brand p {
            line-height: 1.7;
            max-width: 280px;
            color: rgba(255, 255, 255, .6);
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            color: rgba(255, 255, 255, .65);
            transition: color .2s;
        }

        .footer-col a:hover {
            color: var(--gold-400);
        }

        .contact-info li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, .65);
        }

        .contact-info i {
            color: var(--gold-500);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 22px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .main-nav {
                display: none;
            }

            .header-actions .search-box {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .showcase-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }

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

        @media (max-width: 640px) {
            .container {
                padding: 0 20px;
            }

            .site-header,
            .site-header .header-inner {
                height: 64px;
            }

            .header-inner {
                height: 64px;
                gap: 16px;
            }

            .logo-text {
                font-size: 16px;
            }

            .header-actions .btn {
                padding: 0 16px;
                font-size: 14px;
            }

            .page-head {
                padding: 40px 0 32px;
            }

            .page-head h1 {
                font-size: 28px;
            }

            .section {
                padding: 64px 0;
            }

            .feature-showcase {
                padding: 64px 0;
            }

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

            .feature-detail {
                padding: 64px 0;
            }

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

            .section-head h2,
            .showcase-content h2 {
                font-size: 26px;
            }

            .section-head {
                margin-bottom: 32px;
            }

            .capability-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .capability-card {
                padding: 10px 10px 28px;
            }

            .feature-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                padding: 16px 18px;
            }

            .feature-tag {
                align-self: flex-start;
            }

            .cta-bar {
                flex-direction: column;
                align-items: flex-start;
                padding: 32px 24px;
            }

            .cta-bar .btn {
                width: 100%;
            }

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

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

            .showcase-content .btn {
                width: 100%;
            }

            .btn-outline-light {
                width: auto;
            }
        }