/* roulang page: index */
:root {
        --color-primary: #2563eb;
        --color-primary-dark: #1e4fbf;
        --color-secondary: #06b6d4;
        --color-secondary-light: #22d3ee;
        --color-dark: #0b1220;
        --color-dark-soft: #111c30;
        --color-light: #f8fafc;
        --color-muted: #64748b;
        --color-border: #e2e8f0;
        --color-success: #10b981;
        --radius-sm: 0.5rem;
        --radius-md: 0.75rem;
        --radius-lg: 1rem;
        --radius-xl: 1.5rem;
        --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
        --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
        --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.14);
        --shadow-primary: 0 8px 30px rgba(37, 99, 235, 0.28);
        --transition: all 0.3s ease;
    }

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

    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }

    body {
        font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif;
        line-height: 1.6;
        background-color: var(--color-light);
        color: #1e293b;
    }

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

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

    button,
    input {
        font-family: inherit;
    }

    .container-custom {
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .section-padding {
        padding-top: 4.5rem;
        padding-bottom: 4.5rem;
    }

    /* 顶部信息条 */
    .topbar {
        background: #0b1220;
        color: rgba(255, 255, 255, 0.72);
        font-size: 0.8rem;
        padding: 0.45rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .topbar a {
        color: rgba(255, 255, 255, 0.85);
        display: inline-flex;
        align-items: center;
        gap: 0.35rem;
        transition: var(--transition);
    }

    .topbar a:hover {
        color: #22d3ee;
    }

    .topbar i {
        color: #22d3ee;
        font-size: 0.85em;
    }

    /* 主导航 */
    .main-header {
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--color-border);
        position: sticky;
        top: 0;
        z-index: 999;
        box-shadow: var(--shadow-sm);
    }

    .main-header .inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 4.5rem;
        gap: 1rem;
    }

    .logo-brand {
        display: inline-flex;
        align-items: center;
        gap: 0.6rem;
        flex-shrink: 0;
        font-weight: 800;
        font-size: 1.3rem;
        color: var(--color-dark);
        letter-spacing: 0.02em;
    }

    .logo-brand .logo-icon {
        width: 42px;
        height: 42px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
        color: #fff;
        font-size: 1.15rem;
        box-shadow: var(--shadow-primary);
    }

    .main-nav {
        display: flex;
        align-items: center;
        gap: 0.4rem;
    }

    .nav-link {
        display: inline-flex;
        align-items: center;
        gap: 0.35rem;
        padding: 0.55rem 1rem;
        border-radius: 999px;
        font-size: 0.92rem;
        font-weight: 500;
        color: #334155;
        position: relative;
    }

    .nav-link:hover {
        background: rgba(37, 99, 235, 0.08);
        color: var(--color-primary);
    }

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

    .nav-cta {
        display: flex;
        align-items: center;
        gap: 0.6rem;
        margin-left: 0.5rem;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        font-weight: 600;
        border-radius: 999px;
        padding: 0.65rem 1.6rem;
        font-size: 0.92rem;
        line-height: 1.4;
        border: 0;
        cursor: pointer;
        transition: var(--transition);
        text-decoration: none;
        white-space: nowrap;
    }

    .btn-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 0;
        width: 2.5rem;
        height: 2.5rem;
        border-radius: 999px;
        font-size: 1rem;
        background: rgba(37, 99, 235, 0.1);
        color: var(--color-primary);
        border: 1px solid rgba(37, 99, 235, 0.15);
    }

    .btn-icon:hover {
        background: var(--color-primary);
        color: #fff;
        border-color: var(--color-primary);
        transform: translateY(-2px);
    }

    .btn-primary {
        background: linear-gradient(135deg, var(--color-primary) 0%, #3b82f6 100%);
        color: #fff;
        box-shadow: var(--shadow-primary);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 36px rgba(37, 99, 235, 0.35);
        filter: brightness(1.05);
    }

    .btn-outline {
        background: transparent;
        color: var(--color-dark);
        border: 1.5px solid var(--color-border);
    }

    .btn-outline:hover {
        border-color: var(--color-primary);
        color: var(--color-primary);
        background: rgba(37, 99, 235, 0.05);
        transform: translateY(-2px);
    }

    .btn-light {
        background: #fff;
        color: var(--color-dark);
        box-shadow: var(--shadow-md);
    }

    .btn-light:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-lg);
    }

    .hamburger {
        display: none;
        width: 42px;
        height: 42px;
        border-radius: 10px;
        background: rgba(37, 99, 235, 0.08);
        color: var(--color-dark);
        border: 0;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
    }

    /* 移动导航抽屉 */
    .mobile-menu {
        display: none;
        background: #fff;
        border-top: 1px solid var(--color-border);
        padding: 1rem 1.25rem 1.25rem;
        box-shadow: var(--shadow-lg);
    }

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

    .mobile-menu .m-link {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        padding: 0.9rem 1rem;
        border-radius: var(--radius-md);
        color: var(--color-dark);
        font-weight: 600;
        font-size: 0.95rem;
        transition: var(--transition);
    }

    .mobile-menu .m-link:hover,
    .mobile-menu .m-link.active {
        background: rgba(37, 99, 235, 0.08);
        color: var(--color-primary);
    }

    /* Hero */
    .hero {
        position: relative;
        background-image: url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        padding: 5.5rem 0 6.5rem;
    }

    .hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(105deg, rgba(8, 15, 30, 0.9) 0%, rgba(11, 18, 32, 0.78) 35%, rgba(11, 18, 32, 0.45) 75%, rgba(11, 18, 32, 0.35) 100%);
    }

    .hero::after {
        content: "";
        position: absolute;
        inset: auto 0 0 0;
        height: 120px;
        background: linear-gradient(to top, rgba(248, 250, 252, 1) 0%, transparent 100%);
        pointer-events: none;
    }

    .hero .container-custom {
        position: relative;
        z-index: 2;
    }

    .hero-eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        background: rgba(255, 255, 255, 0.12);
        border: 1px solid rgba(255, 255, 255, 0.18);
        backdrop-filter: blur(12px);
        color: #fff;
        padding: 0.45rem 1.1rem;
        border-radius: 999px;
        font-size: 0.85rem;
        font-weight: 500;
        letter-spacing: 0.03em;
        margin-bottom: 1.6rem;
    }

    .hero-eyebrow i {
        color: #22d3ee;
    }

    .hero-title {
        color: #fff;
        font-size: clamp(2.2rem, 5vw, 3.6rem);
        line-height: 1.2;
        font-weight: 800;
        max-width: 760px;
        text-shadow: 0 4px 30px rgba(0, 0, 0, 0.35);
        margin-bottom: 1.4rem;
    }

    .hero-title span {
        background: linear-gradient(90deg, #38bdf8, #22d3ee);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }

    .hero-subtitle {
        color: rgba(255, 255, 255, 0.82);
        font-size: 1.08rem;
        max-width: 620px;
        margin-bottom: 2rem;
        line-height: 1.8;
    }

    .hero-buttons {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
        margin-bottom: 3rem;
    }

    .hero-features {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .hero-feature-item {
        display: flex;
        align-items: center;
        gap: 0.6rem;
        background: rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(8px);
        border: 1px solid rgba(255, 255, 255, 0.14);
        border-radius: var(--radius-md);
        padding: 0.6rem 1.05rem;
        color: rgba(255, 255, 255, 0.88);
        font-size: 0.86rem;
        font-weight: 500;
    }

    .hero-feature-item i {
        color: #22d3ee;
        font-size: 1rem;
    }

    /* 数据条 */
    .stats-section {
        margin-top: -1.5rem;
        position: relative;
        z-index: 3;
        padding-bottom: 2rem;
    }

    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 1rem;
    }

    .stat-card {
        background: #fff;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-lg);
        padding: 1.4rem 1.5rem;
        display: flex;
        align-items: center;
        gap: 1rem;
        box-shadow: var(--shadow-md);
        transition: var(--transition);
    }

    .stat-card:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-lg);
        border-color: rgba(37, 99, 235, 0.3);
    }

    .stat-icon {
        width: 48px;
        height: 48px;
        flex-shrink: 0;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 14px;
        background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
        color: var(--color-primary);
        font-size: 1.2rem;
    }

    .stat-num {
        font-size: 1.5rem;
        font-weight: 800;
        line-height: 1.2;
        color: var(--color-dark);
        letter-spacing: -0.02em;
    }

    .stat-label {
        font-size: 0.82rem;
        color: var(--color-muted);
        margin-top: 2px;
    }

    /* 板块标题 */
    .section-head {
        text-align: center;
        max-width: 680px;
        margin: 0 auto 3rem;
    }

    .section-eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 0.4rem;
        background: rgba(37, 99, 235, 0.08);
        color: var(--color-primary);
        padding: 0.35rem 1rem;
        border-radius: 999px;
        font-size: 0.82rem;
        font-weight: 600;
        letter-spacing: 0.05em;
        margin-bottom: 1rem;
        text-transform: uppercase;
    }

    .section-title {
        font-size: clamp(1.7rem, 3.2vw, 2.4rem);
        font-weight: 800;
        color: var(--color-dark);
        line-height: 1.3;
        letter-spacing: -0.02em;
        margin-bottom: 1rem;
    }

    .section-subtitle {
        color: var(--color-muted);
        font-size: 1rem;
        line-height: 1.8;
    }

    /* 分类卡片 */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }

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

    .category-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        border-color: rgba(37, 99, 235, 0.25);
    }

    .category-img-wrap {
        position: relative;
        height: 190px;
        overflow: hidden;
    }

    .category-img-wrap img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.6s ease;
    }

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

    .category-img-wrap::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(11, 18, 32, 0.6) 0%, transparent 50%);
    }

    .category-tag {
        position: absolute;
        left: 1.1rem;
        bottom: 1rem;
        z-index: 2;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(8px);
        color: var(--color-dark);
        padding: 0.3rem 0.9rem;
        border-radius: 999px;
        font-size: 0.78rem;
        font-weight: 600;
    }

    .category-body {
        padding: 1.7rem;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .category-body h3 {
        font-size: 1.25rem;
        font-weight: 700;
        color: var(--color-dark);
        margin-bottom: 0.6rem;
    }

    .category-body p {
        color: var(--color-muted);
        font-size: 0.92rem;
        line-height: 1.7;
        flex: 1;
        margin-bottom: 1.2rem;
    }

    .category-link {
        display: inline-flex;
        align-items: center;
        gap: 0.4rem;
        color: var(--color-primary);
        font-weight: 600;
        font-size: 0.88rem;
    }

    .category-link:hover {
        gap: 0.7rem;
        color: var(--color-primary-dark);
    }

    /* 功能图文区 */
    .feature-block {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 3.5rem;
        align-items: center;
        margin-bottom: 5rem;
    }

    .feature-block.reverse {
        direction: rtl;
    }

    .feature-block.reverse>* {
        direction: ltr;
    }

    .feature-media {
        position: relative;
        border-radius: var(--radius-xl);
        overflow: hidden;
        box-shadow: var(--shadow-lg);
    }

    .feature-media img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        min-height: 320px;
    }

    .feature-media::after {
        content: "";
        position: absolute;
        inset: 0;
        border: 1px solid rgba(255, 255, 255, 0.15);
        border-radius: var(--radius-xl);
        pointer-events: none;
    }

    .feature-content {
        padding: 0 0.5rem;
    }

    .feature-content .footer-eyebrow {
        margin-bottom: 0.8rem;
    }

    .feature-content h3 {
        font-size: 1.7rem;
        font-weight: 800;
        color: var(--color-dark);
        line-height: 1.35;
        margin-bottom: 1rem;
    }

    .feature-content>p {
        color: var(--color-muted);
        margin-bottom: 1.5rem;
        line-height: 1.8;
    }

    .feature-list {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 0.85rem;
    }

    .feature-list li {
        display: flex;
        align-items: flex-start;
        gap: 0.75rem;
        font-size: 0.94rem;
        color: #334155;
    }

    .feature-list li i {
        margin-top: 0.25rem;
        width: 22px;
        height: 22px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        background: rgba(16, 185, 129, 0.12);
        color: var(--color-success);
        font-size: 0.75rem;
        flex-shrink: 0;
    }

    .eyebrow-sm {
        display: inline-flex;
        align-items: center;
        gap: 0.35rem;
        background: rgba(37, 99, 235, 0.08);
        color: var(--color-primary);
        padding: 0.3rem 0.9rem;
        border-radius: 999px;
        font-size: 0.78rem;
        font-weight: 600;
        margin-bottom: 0.8rem;
    }

    /* 资讯区 */
    .news-section {
        background: #fff;
        border-top: 1px solid var(--color-border);
        border-bottom: 1px solid var(--color-border);
    }

    .news-layout {
        display: grid;
        grid-template-columns: 1.7fr 1fr;
        gap: 2rem;
        align-items: start;
    }

    .news-list {
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
    }

    .news-item {
        display: flex;
        align-items: center;
        gap: 1.2rem;
        background: var(--color-light);
        border-radius: var(--radius-lg);
        padding: 1.2rem 1.4rem;
        border: 1px solid var(--color-border);
        transition: var(--transition);
    }

    .news-item:hover {
        background: #fff;
        border-color: rgba(37, 99, 235, 0.3);
        box-shadow: var(--shadow-md);
        transform: translateX(4px);
    }

    .news-icon {
        width: 48px;
        height: 48px;
        flex-shrink: 0;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 14px;
        background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(6, 182, 212, 0.08));
        color: var(--color-primary);
        font-size: 1.1rem;
    }

    .news-main {
        flex: 1;
        min-width: 0;
    }

    .news-main h3 {
        font-size: 1rem;
        font-weight: 600;
        color: var(--color-dark);
        margin-bottom: 0.25rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .news-main h3 a:hover {
        color: var(--color-primary);
    }

    .news-main p {
        font-size: 0.87rem;
        color: var(--color-muted);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .news-meta {
        display: flex;
        flex-direction: column;
        align-items: flex-end;
        gap: 0.3rem;
        flex-shrink: 0;
    }

    .badge-pill {
        display: inline-flex;
        align-items: center;
        gap: 0.3rem;
        background: rgba(37, 99, 235, 0.08);
        color: var(--color-primary);
        padding: 0.25rem 0.8rem;
        border-radius: 999px;
        font-size: 0.75rem;
        font-weight: 600;
    }

    .news-meta time {
        font-size: 0.75rem;
        color: #94a3b8;
    }

    .news-arrow {
        width: 32px;
        height: 32px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        background: #fff;
        border: 1px solid var(--color-border);
        color: var(--color-primary);
        font-size: 0.8rem;
        transition: var(--transition);
        flex-shrink: 0;
    }

    .news-item:hover .news-arrow {
        background: var(--color-primary);
        color: #fff;
        border-color: var(--color-primary);
    }

    .empty-text {
        padding: 2.5rem;
        text-align: center;
        color: var(--color-muted);
        background: var(--color-light);
        border: 1px dashed var(--color-border);
        border-radius: var(--radius-lg);
    }

    .news-side {
        border-radius: var(--radius-xl);
        overflow: hidden;
        position: sticky;
        top: 6rem;
        box-shadow: var(--shadow-md);
        border: 1px solid var(--color-border);
    }

    .news-side img {
        width: 100%;
        height: 320px;
        object-fit: cover;
    }

    .news-side-body {
        padding: 1.5rem;
        background: #fff;
    }

    .news-side-body h4 {
        font-size: 1.1rem;
        font-weight: 700;
        margin-bottom: 0.5rem;
    }

    .news-side-body p {
        font-size: 0.88rem;
        color: var(--color-muted);
        line-height: 1.7;
        margin-bottom: 1rem;
    }

    /* 流程 */
    .process-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 1.5rem;
    }

    .process-step {
        position: relative;
        background: #fff;
        border-radius: var(--radius-xl);
        padding: 2rem 1.5rem 1.8rem;
        border: 1px solid var(--color-border);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        text-align: center;
    }

    .process-step:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }

    .step-num {
        position: absolute;
        top: -14px;
        left: 50%;
        transform: translateX(-50%);
        width: 28px;
        height: 28px;
        background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
        color: #fff;
        border-radius: 50%;
        font-size: 0.8rem;
        font-weight: 700;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: var(--shadow-primary);
    }

    .step-icon {
        width: 56px;
        height: 56px;
        margin: 0 auto 1rem;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 18px;
        background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(6, 182, 212, 0.08));
        color: var(--color-primary);
        font-size: 1.35rem;
    }

    .process-step h3 {
        font-size: 1.05rem;
        font-weight: 700;
        margin-bottom: 0.4rem;
        color: var(--color-dark);
    }

    .process-step p {
        font-size: 0.86rem;
        color: var(--color-muted);
        line-height: 1.7;
    }

    /* FAQ */
    .faq-section {
        background: #f1f5f9;
    }

    .faq-wrap {
        max-width: 820px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 0.85rem;
    }

    .faq-item {
        background: #fff;
        border-radius: var(--radius-lg);
        border: 1px solid var(--color-border);
        overflow: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow-sm);
    }

    .faq-item:hover {
        border-color: rgba(37, 99, 235, 0.3);
        box-shadow: var(--shadow-md);
    }

    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1rem;
        padding: 1.1rem 1.4rem;
        cursor: pointer;
        font-weight: 600;
        font-size: 0.98rem;
        color: var(--color-dark);
        background: transparent;
        border: 0;
        text-align: left;
        width: 100%;
        transition: var(--transition);
    }

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

    .faq-question .q-icon {
        width: 30px;
        height: 30px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        background: rgba(37, 99, 235, 0.08);
        color: var(--color-primary);
        font-size: 0.8rem;
        font-weight: 700;
        flex-shrink: 0;
    }

    .faq-question .toggle-icon {
        width: 30px;
        height: 30px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        background: var(--color-light);
        color: var(--color-muted);
        font-size: 0.8rem;
        transition: var(--transition);
        flex-shrink: 0;
    }

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

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
    }

    .faq-answer-inner {
        padding: 0 1.4rem 1.3rem;
        color: var(--color-muted);
        font-size: 0.92rem;
        line-height: 1.8;
        border-top: 1px solid var(--color-border);
        padding-top: 1rem;
    }

    /* CTA */
    .cta-section {
        position: relative;
        background-image: url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
        padding: 5rem 0;
        text-align: center;
    }

    .cta-section::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(120deg, rgba(11, 18, 32, 0.94), rgba(37, 99, 235, 0.7), rgba(6, 182, 212, 0.55));
    }

    .cta-section .container-custom {
        position: relative;
        z-index: 2;
    }

    .cta-title {
        color: #fff;
        font-size: clamp(1.6rem, 3.4vw, 2.5rem);
        font-weight: 800;
        margin-bottom: 1rem;
        letter-spacing: -0.01em;
    }

    .cta-text {
        color: rgba(255, 255, 255, 0.85);
        font-size: 1.02rem;
        max-width: 560px;
        margin: 0 auto 2rem;
        line-height: 1.8;
    }

    .cta-buttons {
        display: flex;
        justify-content: center;
        gap: 1rem;
        flex-wrap: wrap;
    }

    /* Footer */
    .site-footer {
        background: var(--color-dark);
        color: rgba(255, 255, 255, 0.68);
        padding-top: 4rem;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.2fr;
        gap: 3rem;
        padding-bottom: 3rem;
    }

    .footer-brand h3 {
        color: #fff;
        font-size: 1.35rem;
        font-weight: 800;
        margin-bottom: 0.8rem;
        display: flex;
        align-items: center;
        gap: 0.6rem;
    }

    .footer-brand h3 i {
        color: #22d3ee;
    }

    .footer-brand p {
        font-size: 0.88rem;
        line-height: 1.8;
        color: rgba(255, 255, 255, 0.6);
        max-width: 280px;
    }

    .footer-col h4 {
        color: #fff;
        font-size: 0.95rem;
        font-weight: 600;
        margin-bottom: 1.2rem;
        letter-spacing: 0.03em;
    }

    .footer-col ul {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }

    .footer-col ul a {
        font-size: 0.86rem;
        color: rgba(255, 255, 255, 0.58);
        transition: var(--transition);
        display: inline-block;
    }

    .footer-col ul a:hover {
        color: #22d3ee;
        padding-left: 4px;
    }

    .footer-contact li {
        display: flex;
        align-items: center;
        gap: 0.6rem;
        font-size: 0.86rem;
        color: rgba(255, 255, 255, 0.58);
        margin-bottom: 0.6rem;
    }

    .footer-contact li i {
        color: #22d3ee;
        width: 20px;
        text-align: center;
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding: 1.3rem 0;
        text-align: center;
        font-size: 0.82rem;
        color: rgba(255, 255, 255, 0.42);
    }

    .footer-bottom a {
        color: rgba(255, 255, 255, 0.55);
    }

    .footer-bottom a:hover {
        color: #22d3ee;
    }

    /* 焦点可见性 */
    a:focus-visible,
    button:focus-visible,
    input:focus-visible {
        outline: 3px solid rgba(37, 99, 235, 0.5);
        outline-offset: 2px;
        border-radius: 6px;
    }

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

        .nav-cta .btn-outline {
            display: none;
        }

        .hamburger {
            display: inline-flex;
        }

        .category-grid {
            gap: 1.2rem;
        }

        .process-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

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

        .feature-block {
            gap: 2rem;
        }

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

        .news-side {
            position: static;
        }

        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
    }

    @media (max-width: 768px) {
        .section-padding {
            padding-top: 3rem;
            padding-bottom: 3rem;
        }

        .hero {
            padding: 3.5rem 0 5rem;
        }

        .hero-title {
            font-size: 2rem;
        }

        .hero-subtitle {
            font-size: 0.96rem;
        }

        .hero-features {
            gap: 0.6rem;
        }

        .hero-feature-item {
            font-size: 0.78rem;
            padding: 0.45rem 0.8rem;
        }

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

        .feature-block,
        .feature-block.reverse {
            grid-template-columns: 1fr;
            gap: 2rem;
            direction: ltr;
        }

        .feature-media img {
            min-height: 240px;
        }

        .feature-content {
            padding: 0;
        }

        .stats-grid {
            grid-template-columns: 1fr 1fr;
            gap: 0.75rem;
        }

        .stat-card {
            padding: 1rem;
        }

        .stat-icon {
            width: 40px;
            height: 40px;
            font-size: 1rem;
        }

        .stat-num {
            font-size: 1.2rem;
        }

        .process-grid {
            grid-template-columns: 1fr;
            gap: 1.25rem;
        }

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

        .news-item {
            flex-wrap: wrap;
            gap: 0.8rem;
        }

        .news-meta {
            flex-direction: row;
            align-items: center;
            gap: 0.5rem;
        }

        .news-arrow {
            display: none;
        }

        .news-main h3,
        .news-main p {
            white-space: normal;
            overflow: visible;
        }

        .topbar .topbar-right {
            display: none;
        }

        .topbar {
            text-align: center;
        }
    }

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

        .logo-brand {
            font-size: 1.1rem;
        }

        .logo-brand .logo-icon {
            width: 36px;
            height: 36px;
            font-size: 1rem;
        }

        .main-header .inner {
            height: 4rem;
        }

        .nav-cta .btn {
            font-size: 0.85rem;
            padding: 0.55rem 1.1rem;
        }

        .btn-icon {
            width: 2.2rem;
            height: 2.2rem;
        }

        .hero-buttons .btn {
            font-size: 0.88rem;
            padding: 0.6rem 1.2rem;
        }

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

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

        .footer-grid {
            gap: 1.5rem;
        }
    }

/* roulang page: category1 */
:root {
            --primary: #0e4d92;
            --primary-light: #1a6bc7;
            --primary-dark: #083a6d;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #f8fafc;
            --bg-alt: #f1f5f9;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --radius: 14px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --transition: all 0.3s ease;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; }
        .container-custom { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        img { max-width: 100%; height: auto; }
        .topbar { background: var(--primary-dark); color: #fff; font-size: 13px; padding: 6px 0; }
        .topbar .container-custom { display: flex; justify-content: space-between; align-items: center; }
        .topbar-info { color: rgba(255,255,255,0.8); }
        .topbar-links a { color: rgba(255,255,255,0.8); margin-left: 16px; }
        .topbar-links a:hover { color: #fff; }
        @media (max-width: 640px) { .topbar-links { display: none; } .topbar-info { width: 100%; text-align: center; } }
        .main-header { background: #fff; padding: 0; box-shadow: 0 2px 8px rgba(0,0,0,0.05); padding: 12px 0; position: sticky; top: 0; z-index: 100; }
        .header-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
        .logo { font-size: 22px; font-weight: 800; color: var(--primary); display: flex; align-items: center; gap: 10px; }
        .logo i { color: var(--accent); }
        .main-nav { display: flex; gap: 6px; flex-wrap: wrap; }
        .main-nav .nav-link { display: inline-flex; align-items: center; gap: 6px; padding: 10px 18px; border-radius: 8px; font-size: 15px; font-weight: 500; color: var(--text); transition: var(--transition); }
        .main-nav .nav-link:hover { background: var(--bg-alt); color: var(--primary); }
        .main-nav .nav-link.active { background: var(--primary); color: #fff; box-shadow: 0 2px 12px rgba(14,77,146,0.25); }
        .nav-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--primary); cursor: pointer; }
        @media (max-width: 768px) {
            .nav-toggle { display: inline-flex; }
            .main-nav { display: none; width: 100%; padding-top: 12px; flex-direction: column; }
            .main-nav.open { display: flex; }
            .main-nav .nav-link { justify-content: center; }
        }
        .page-banner { background-image: linear-gradient(135deg, rgba(14,77,146,0.92), rgba(14,77,146,0.75)), url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; color: #fff; padding: 80px 0 60px; text-align: center; }
        .page-banner h1 { font-size: 40px; font-weight: 800; margin-bottom: 12px; }
        .page-banner p { font-size: 17px; max-width: 700px; margin: 0 auto 24px; color: rgba(255,255,255,0.9); }
        .breadcrumb { display: flex; gap: 8px; justify-content: center; font-size: 14px; color: rgba(255,255,255,0.7); }
        .breadcrumb a { color: rgba(255,255,255,0.85); }
        .breadcrumb a:hover { color: #fff; }
        @media (max-width: 768px) {
            .page-banner { padding: 48px 0 36px; }
            .page-banner h1 { font-size: 28px; }
        }
        .section { padding: 72px 0; }
        .section-alt { background: var(--bg-alt); }
        .section .container-custom { position: relative; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title .sub-title { display: inline-flex; align-items: center; gap: 8px; background: rgba(14,77,146,0.08); color: var(--primary); padding: 4px 14px; border-radius: 50px; font-size: 13px; font-weight: 600; margin-bottom: 12px; }
        .section-title h2 { font-size: 30px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
        .section-title p { color: var(--text-light); max-width: 640px; margin: 0 auto; }
        .cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; }
        .cards-grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
        .cards-grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); gap: 24px; }
        @media (max-width: 768px) { .cards-grid-2 { grid-template-columns: 1fr; min-width: 0; } }
        .feature-card { background: #fff; border-radius: var(--radius); padding: 28px 22px; border: 1px solid var(--border); box-shadow: var(--shadow); transition: var(--transition); }
        .feature-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.1); }
        .feature-card .icon { font-size: 32px; color: var(--primary); margin-bottom: 14px; width: 56px; height: 56px; background: rgba(14,77,146,0.1); border-radius: 12px; display: flex; align-items: center; justify-content: center; }
        .feature-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
        .feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }
        .step-container { counter-reset: step; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
        .step-item { position: relative; background: #fff; border-radius: var(--radius); padding: 24px; text-align: center; border: 1px solid var(--border); transition: var(--transition); }
        .step-item:hover { transform: translateY(-3px); box-shadow: 0 6px 24px rgba(0,0,0,0.08); }
        .step-item::before { counter-increment: step; content: counter(step); position: absolute; top: -14px; left: 50%; transform: translateX(-50%); width: 28px; height: 28px; background: var(--accent); color: #fff; border-radius: 50%; font-size: 13px; font-weight: 700; line-height: 28px; }
        .step-item .icon { font-size: 30px; color: var(--primary); margin-bottom: 12px; }
        .step-item h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
        .step-item p { font-size: 14px; color: var(--text-light); }
        .faq-item { background: #fff; border-radius: var(--radius); border: 1px solid var(--border); margin-bottom: 12px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.03); }
        .faq-question { display: flex; justify-content: space-between; align-items: center; padding: 18px 24px; cursor: pointer; font-weight: 600; background: #fff; border: none; width: 100%; text-align: left; color: var(--text); font-size: 15px; }
        .faq-answer { padding: 0 24px 18px; color: var(--text-light); font-size: 14px; display: none; }
        .faq-question i { transition: transform 0.3s ease; font-size: 14px; }
        .faq-item.open .faq-answer { display: block; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, #0b2545 100%); color: #fff; padding: 64px 0; border-radius: 0; }
        .cta-inner { text-align: center; }
        .cta-inner h2 { font-size: 30px; margin-bottom: 12px; }
        .cta-inner p { font-size: 16px; margin-bottom: 28px; color: rgba(255,255,255,0.85); }
        .btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 8px; font-weight: 600; font-size: 16px; transition: var(--transition); border: none; cursor: pointer; }
        .btn-primary { background: var(--accent); color: #1e293b; box-shadow: 0 4px 16px rgba(245,158,11,0.3); }
        .btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(245,158,11,0.4); }
        .btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.6); }
        .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; transform: translateY(-2px); }
        .site-footer { background: #0f172a; color: #94a3b8; padding: 64px 0 0; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); }
        @media (max-width: 992px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; } }
        .footer-brand h3 { color: #fff; font-size: 20px; margin-bottom: 12px; }
        .footer-brand h3 i { color: var(--accent); }
        .footer-brand p { font-size: 14px; line-height: 1.8; }
        .footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
        .footer-col ul { list-style: none; }
        .footer-col ul li { margin-bottom: 10px; font-size: 14px; }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-contact li { display: flex; gap: 10px; }
        .footer-bottom { text-align: center; padding: 20px 0 24px; font-size: 13px; color: rgba(255,255,255,0.5); }
        .tech-card { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow); transition: var(--transition); }
        .tech-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.1); }
        .tech-card img { width: 100%; height: 180px; object-fit: cover; }
        .tech-card-body { padding: 22px; }
        .tech-card-body h3 { font-size: 18px; margin-bottom: 8px; }
        .tech-card-body p { font-size: 14px; color: var(--text-light); }
        .data-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 20px; }
        .data-item { text-align: center; padding: 32px 16px; background: #fff; border-radius: var(--radius); border: 1px solid var(--border); }
        .data-item .num { font-size: 36px; font-weight: 800; color: var(--primary); line-height: 1.2; }
        .data-item .label { font-size: 14px; color: var(--text-light); margin-top: 8px; }
        .route-list { list-style: none; }
        .route-list li { display: flex; align-items: flex-start; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--border); }
        .route-list li .route-icon { color: var(--accent); font-size: 18px; }
        .route-list li .route-content h4 { font-size: 15px; font-weight: 600; color: var(--primary); margin-bottom: 4px; }
        .route-list li .route-content p { font-size: 14px; color: var(--text-light); }
        .badge { display: inline-block; padding: 3px 10px; border-radius: 50px; font-size: 12px; font-weight: 600; }
        .label { display: inline-block; padding: 4px 12px; }

/* roulang page: category2 */
:root {
            --brand: #1a6fe0;
            --brand-dark: #1558b8;
            --brand-light: #eef7ff;
            --accent: #f59e0b;
            --deep-bg: #0f172a;
            --text-main: #1e293b;
            --text-weak: #64748b;
            --border-color: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --space-section: 5rem;
            --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 12px 40px rgba(26, 111, 224, 0.14);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            color: var(--text-main);
            background: #f8fafc;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

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

        /* ===== Top Info Bar ===== */
        .top-bar {
            background: var(--deep-bg);
            color: rgba(255, 255, 255, 0.85);
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .top-bar .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }

        .top-bar a {
            color: rgba(255, 255, 255, 0.85);
        }

        .top-bar a:hover {
            color: #fff;
        }

        .top-contact span {
            margin-right: 20px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: #fff;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            flex-wrap: wrap;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-main);
            white-space: nowrap;
        }

        .brand i {
            color: var(--brand);
            font-size: 28px;
        }

        .brand span {
            background: linear-gradient(135deg, #1a6fe0, #59b0ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            border-radius: 999px;
            font-weight: 500;
            font-size: 15px;
            color: var(--text-weak);
            transition: all 0.25s ease;
            border: 1px solid transparent;
        }

        .nav-link i {
            font-size: 14px;
        }

        .nav-link:hover {
            color: var(--brand);
            background: var(--brand-light);
            border-color: #bce0ff;
        }

        .nav-link.active {
            background: linear-gradient(135deg, #1a6fe0, #338ef5);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26, 111, 224, 0.3);
        }

        .nav-cta {
            margin-left: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: all 0.25s ease;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, #1a6fe0, #338ef5);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26, 111, 224, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 111, 224, 0.36);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.7);
            color: #fff;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
        }

        /* ===== Hero / Page Banner ===== */
        .page-banner {
            position: relative;
            background: linear-gradient(135deg, #0f172a 0%, #1a2b4a 60%, #1a6fe0 100%);
            color: #fff;
            padding: 100px 0 90px;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
            opacity: 0.25;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(89, 176, 255, 0.3) 0%, transparent 70%);
            border-radius: 50%;
        }

        .page-banner .container-custom {
            position: relative;
            z-index: 2;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 6px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            backdrop-filter: blur(8px);
        }

        .page-banner h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.15;
            margin: 20px 0 16px;
        }

        .page-banner h1 span {
            color: #8eccff;
        }

        .page-banner p.lead {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 620px;
            margin-bottom: 28px;
        }

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

        .banner-metrics {
            display: flex;
            gap: 32px;
            margin-top: 48px;
            flex-wrap: wrap;
        }

        .banner-metrics .metric {
            text-align: center;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 14px 28px;
            border-radius: var(--radius);
            backdrop-filter: blur(8px);
        }

        .banner-metrics .metric strong {
            font-size: 26px;
            font-weight: 800;
            display: block;
            color: #8eccff;
        }

        .banner-metrics .metric span {
            font-size: 13px;
            opacity: 0.8;
        }

        /* ===== Section General ===== */
        .section {
            padding: var(--space-section) 0;
        }

        .section-alt {
            background: #f1f5f9;
        }

        .section-white {
            background: #fff;
        }

        .section-head {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 48px;
        }

        .section-head .tag {
            display: inline-block;
            background: var(--brand-light);
            color: var(--brand);
            font-size: 14px;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: 999px;
            margin-bottom: 14px;
            border: 1px solid #bce0ff;
        }

        .section-head h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-main);
        }

        .section-head p {
            color: var(--text-weak);
            font-size: 17px;
            line-height: 1.7;
        }

        /* ===== Feature Cards Grid ===== */
        .grid-features {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 28px;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: #bce0ff;
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--brand-light), #d9edff);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--brand);
            margin-bottom: 18px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .feature-card p {
            color: var(--text-weak);
            font-size: 14.5px;
            line-height: 1.7;
        }

        /* ===== Image Text Block ===== */
        .image-text-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .image-text-grid.reverse .text-side {
            order: 2;
        }

        .image-text-grid.reverse .image-side {
            order: 1;
        }

        .text-side h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .text-side p {
            color: var(--text-weak);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .check-list {
            list-style: none;
            padding: 0;
            margin: 16px 0 24px;
        }

        .check-list li {
            padding: 8px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 500;
        }

        .check-list li i {
            color: var(--brand);
            background: var(--brand-light);
            width: 26px;
            height: 26px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
        }

        .image-side {
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            border: 4px solid #fff;
            background: #fff;
        }

        .image-side img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        .image-side .img-caption {
            padding: 14px 18px;
            text-align: center;
            font-size: 14px;
            color: var(--text-weak);
            border-top: 1px solid var(--border-color);
        }

        /* ===== Flow / Steps ===== */
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            text-align: center;
            padding: 28px 20px;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
            position: relative;
        }

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

        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #1a6fe0, #338ef5);
            color: #fff;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 16px;
            box-shadow: 0 4px 12px rgba(26, 111, 224, 0.3);
        }

        .step-item h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-weak);
        }

        /* ===== Stats band ===== */
        .stats-band {
            background: linear-gradient(135deg, #0f172a, #1a2b4a);
            padding: 60px 0;
            color: #fff;
        }

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

        .stat-item strong {
            font-size: 40px;
            font-weight: 800;
            background: linear-gradient(135deg, #8eccff, #fff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: block;
        }

        .stat-item span {
            font-size: 15px;
            opacity: 0.75;
            margin-top: 6px;
            display: block;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow 0.3s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-card);
        }

        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            list-style: none;
        }

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

        .faq-item summary::before {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--brand);
            transition: transform 0.3s ease;
            font-size: 14px;
        }

        .faq-item[open] summary::before {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 24px 18px 44px;
            color: var(--text-weak);
            line-height: 1.75;
            font-size: 15px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1a6fe0, #338ef5);
            border-radius: 24px;
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50px;
            left: -50px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            right: -40px;
            width: 160px;
            height: 160px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
        }

        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 17px;
            opacity: 0.9;
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }

        .cta-section .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .btn-white {
            background: #fff;
            color: var(--brand);
        }

        .btn-white:hover {
            background: #f1f5f9;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 70px 0 24px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .footer-brand h3 i {
            color: #338ef5;
            margin-right: 6px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #94a3b8;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
        }

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

        .footer-col ul li a {
            color: #94a3b8;
            font-size: 14px;
            transition: color 0.25s ease;
        }

        .footer-col ul li a:hover {
            color: #338ef5;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
        }

        .footer-contact li i {
            color: #338ef5;
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 14px;
            color: #64748b;
        }

        /* ===== Mobile Menu ===== */
        .mobile-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-color);
            color: var(--text-main);
            width: 42px;
            height: 42px;
            border-radius: 10px;
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all 0.25s ease;
        }

        .mobile-toggle:hover {
            background: var(--brand-light);
            border-color: var(--brand);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-features {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

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

            .image-text-grid {
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 3.5rem;
            }

            .container-custom {
                padding: 0 16px;
            }

            .top-bar .container-custom {
                justify-content: center;
                text-align: center;
            }

            .top-contact {
                display: none;
            }

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

            .brand {
                font-size: 18px;
            }

            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0;
                gap: 6px;
                border-top: 1px solid var(--border-color);
                margin-top: 12px;
            }

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

            .nav-link {
                padding: 12px 16px;
                border-radius: 10px;
                justify-content: flex-start;
            }

            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
            }

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

            .mobile-toggle {
                display: flex;
            }

            .page-banner {
                padding: 60px 0 50px;
            }

            .page-banner h1 {
                font-size: 30px;
            }

            .page-banner p.lead {
                font-size: 16px;
            }

            .banner-metrics {
                gap: 14px;
                margin-top: 28px;
            }

            .banner-metrics .metric {
                padding: 10px 16px;
                flex: 1;
            }

            .banner-metrics .metric strong {
                font-size: 20px;
            }

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

            .section-head p {
                font-size: 15px;
            }

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

            .image-text-grid,
            .image-text-grid.reverse {
                grid-template-columns: 1fr;
            }

            .image-text-grid.reverse .text-side {
                order: 1;
            }

            .image-text-grid.reverse .image-side {
                order: 2;
            }

            .image-side img {
                height: 220px;
            }

            .flow-steps {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .stat-item strong {
                font-size: 30px;
            }

            .faq-list {
                padding: 0;
            }

            .cta-section {
                padding: 36px 24px;
                border-radius: 16px;
            }

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

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

            .footer-bottom {
                font-size: 13px;
            }

            .footer-bottom p {
                padding: 0 12px;
                line-height: 1.6;
            }
        }

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

            .banner-metrics {
                flex-direction: column;
            }

            .banner-metrics .metric {
                width: 100%;
            }

            .page-banner h1 {
                font-size: 26px;
            }

            .section-head h2 {
                font-size: 22px;
            }

            .cta-section {
                padding: 30px 18px;
            }

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

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

/* roulang page: article */
:root {
            --primary: #0b1f3a;
            --primary-light: #1a365d;
            --accent: #c8a46e;
            --accent-hover: #b8945a;
            --bg-light: #f5f7fa;
            --text-body: #334155;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --card-shadow: 0 4px 24px rgba(2, 12, 27, 0.06);
            --radius: 16px;
            --radius-sm: 10px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            color: var(--text-body);
            background: #fff;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

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

        ul,
        ol {
            list-style: none;
        }

        .container-custom {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        @media (min-width: 768px) {
            .container-custom {
                padding-left: 1.75rem;
                padding-right: 1.75rem;
            }
        }
        @media (min-width: 1280px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* ===== 顶部信息条 ===== */
        .top-bar {
            background: linear-gradient(135deg, #081524 0%, #0b1f3a 100%);
            color: rgba(255, 255, 255, .82);
            font-size: .82rem;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            position: relative;
            z-index: 20;
        }
        .top-bar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 38px;
        }
        .top-bar a {
            color: var(--accent);
        }
        .top-bar a:hover {
            color: #e0c697;
        }

        /* ===== 主导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, .96);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(226, 232, 240, .8);
            box-shadow: 0 1px 12px rgba(2, 12, 27, .04);
        }
        .header-main-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            min-height: 74px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: .65rem;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #0f2a43, #1a365d);
            color: var(--accent);
            border-radius: 12px;
            font-size: 1.2rem;
            box-shadow: 0 4px 14px rgba(11, 31, 58, .25);
        }
        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: .02em;
            white-space: nowrap;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: .35rem;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: .4rem;
            padding: .55rem 1rem;
            border-radius: 10px;
            font-size: .94rem;
            font-weight: 600;
            color: #475569;
            transition: all .2s ease;
            position: relative;
        }
        .nav-link i {
            font-size: .9rem;
            color: var(--accent);
            transition: transform .2s ease;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(200, 164, 110, .12);
        }
        .nav-link:hover i {
            transform: translateY(-2px);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(11, 31, 58, .06);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
        }
        .nav-link:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: none;
            background: var(--bg-light);
            border-radius: 10px;
            color: var(--primary);
            font-size: 1.1rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all .2s ease;
        }
        .menu-toggle:hover {
            background: rgba(200, 164, 110, .2);
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 12px 30px rgba(2, 12, 27, .1);
            padding: .8rem 1.2rem 1.2rem;
            flex-direction: column;
            gap: .3rem;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            display: flex;
            align-items: center;
            gap: .5rem;
            padding: .7rem .8rem;
            border-radius: 10px;
            font-weight: 600;
            font-size: .95rem;
            color: #475569;
            transition: background .2s ease;
        }
        .mobile-menu a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        @media (max-width: 1024px) {
            .main-nav {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
        }
        @media (max-width: 640px) {
            .logo-text {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
            .top-bar-inner {
                min-height: 34px;
                font-size: .75rem;
            }
        }

        /* ===== 页面 Banner ===== */
        .page-banner {
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 4.5rem 0 5.5rem;
            color: #fff;
            text-align: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 31, 58, .78) 0%, rgba(11, 31, 58, .55) 50%, rgba(11, 31, 58, .82) 100%);
        }
        .page-banner > .container-custom {
            position: relative;
            z-index: 1;
        }
        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            padding: .4rem 1.2rem;
            border-radius: 999px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .25);
            font-size: .85rem;
            letter-spacing: .04em;
            backdrop-filter: blur(6px);
            margin-bottom: 1rem;
        }
        .banner-title {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 700;
            line-height: 1.3;
            max-width: 800px;
            margin: 0 auto .6rem;
            text-shadow: 0 2px 12px rgba(0, 0, 0, .3);
        }
        .banner-desc {
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
            color: rgba(255, 255, 255, .85);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            border-bottom: 1px solid var(--border-color);
            background: #f8fafc;
            padding: .8rem 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: .4rem;
            font-size: .88rem;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color .2s ease;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
            max-width: 260px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ===== 文章主体 ===== */
        .article-section {
            padding: 3rem 0 4rem;
            background: var(--bg-light);
        }
        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr);
            gap: 2.2rem;
        }
        @media (min-width: 1024px) {
            .article-layout {
                grid-template-columns: minmax(0, 1fr) 340px;
                gap: 2.5rem;
            }
        }

        .article-card {
            background: #fff;
            border-radius: var(--radius);
            padding: clamp(1.5rem, 3vw, 2.5rem);
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(226, 232, 240, .6);
        }
        .article-title {
            font-size: clamp(1.5rem, 2.5vw, 2.1rem);
            font-weight: 700;
            color: var(--primary);
            line-height: 1.35;
            margin-bottom: 1rem;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: .85rem;
            color: var(--text-muted);
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 1.1rem;
            margin-bottom: 1.6rem;
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: .35rem;
        }
        .article-meta i {
            color: var(--accent);
        }

        .article-content {
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text-body);
            word-break: break-word;
        }
        .article-content h2 {
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--primary);
            margin: 2rem 0 .9rem;
            padding-left: .9rem;
            border-left: 4px solid var(--accent);
            line-height: 1.4;
        }
        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary);
            margin: 1.6rem 0 .7rem;
        }
        .article-content p {
            margin-bottom: 1.2rem;
        }
        .article-content ul,
        .article-content ol {
            margin: 1rem 0 1.3rem;
            padding-left: 1.4rem;
        }
        .article-content ul li {
            list-style: disc;
            margin-bottom: .45rem;
        }
        .article-content ol li {
            list-style: decimal;
            margin-bottom: .45rem;
        }
        .article-content img {
            border-radius: 12px;
            margin: 1.2rem 0;
        }
        .article-content a {
            color: var(--primary);
            font-weight: 600;
            border-bottom: 1px solid var(--accent);
        }
        .article-content a:hover {
            color: var(--accent-hover);
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: rgba(200, 164, 110, .08);
            padding: .8rem 1.2rem;
            border-radius: 0 10px 10px 0;
            margin: 1.2rem 0;
            color: var(--primary);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: .6rem;
            margin-top: 2rem;
            padding-top: 1.4rem;
            border-top: 1px solid var(--border-color);
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: .35rem;
            padding: .35rem .9rem;
            border-radius: 999px;
            background: rgba(200, 164, 110, .14);
            color: var(--primary);
            font-size: .8rem;
            font-weight: 600;
            border: 1px solid rgba(200, 164, 110, .3);
        }

        .article-notfound {
            text-align: center;
            padding: 3.5rem 1.5rem;
        }
        .article-notfound i {
            font-size: 3rem;
            color: var(--accent);
            margin-bottom: 1.2rem;
        }
        .article-notfound h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: .6rem;
        }
        .article-notfound p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            padding: .75rem 1.7rem;
            border-radius: 12px;
            background: linear-gradient(135deg, #0f2a43, #1a365d);
            color: #fff;
            font-weight: 600;
            font-size: .92rem;
            border: none;
            cursor: pointer;
            box-shadow: 0 6px 20px rgba(11, 31, 58, .2);
            transition: all .25s ease;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(11, 31, 58, .28);
            color: #fff;
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        .btn-gold {
            background: linear-gradient(135deg, #c8a46e, #b8945a);
            color: #fff;
            box-shadow: 0 6px 20px rgba(200, 164, 110, .35);
        }
        .btn-gold:hover {
            background: linear-gradient(135deg, #d4b583, #c8a46e);
            box-shadow: 0 10px 28px rgba(200, 164, 110, .42);
            color: #fff;
        }

        /* ===== 侧边栏 ===== */
        .sidebar-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(226, 232, 240, .6);
            margin-bottom: 1.5rem;
        }
        .sidebar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: .5rem;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: .85rem;
            margin-bottom: 1rem;
        }
        .sidebar-card h3 i {
            color: var(--accent);
        }
        .sidebar-nav li {
            margin-bottom: .4rem;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: .55rem;
            padding: .65rem .85rem;
            border-radius: 10px;
            font-weight: 600;
            font-size: .9rem;
            color: #475569;
            transition: all .2s ease;
        }
        .sidebar-nav a:hover {
            background: rgba(200, 164, 110, .1);
            color: var(--primary);
            padding-left: 1.1rem;
        }
        .sidebar-nav a i {
            color: var(--accent);
            width: 18px;
            text-align: center;
        }

        .side-post {
            display: flex;
            gap: .75rem;
            padding: .6rem 0;
            border-bottom: 1px solid rgba(226, 232, 240, .6);
            align-items: flex-start;
        }
        .side-post:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .side-post img {
            width: 76px;
            height: 60px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
        }
        .side-post a {
            font-size: .86rem;
            font-weight: 600;
            color: #334155;
            line-height: 1.5;
            transition: color .2s ease;
        }
        .side-post a:hover {
            color: var(--accent-hover);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 3.5rem 0;
            background: #fff;
        }
        .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: .8rem;
            margin-bottom: 2rem;
        }
        .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            position: relative;
            padding-left: 1rem;
            border-left: 4px solid var(--accent);
            line-height: 1.3;
        }
        .section-link {
            font-size: .9rem;
            color: var(--text-muted);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            transition: color .2s ease;
        }
        .section-link:hover {
            color: var(--primary);
        }

        .related-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        @media (min-width: 640px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        .related-card {
            background: #fff;
            border: 1px solid rgba(226, 232, 240, .7);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(2, 12, 27, .04);
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 14px 34px rgba(2, 12, 27, .1);
            border-color: rgba(200, 164, 110, .4);
        }
        .related-card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }
        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .45s ease;
        }
        .related-card:hover .related-card-img img {
            transform: scale(1.06);
        }
        .related-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(11, 31, 58, .45));
        }
        .related-card-body {
            padding: 1.3rem 1.4rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: .5rem;
            line-height: 1.45;
            transition: color .2s ease;
        }
        .related-card:hover .related-card-body h3 {
            color: var(--accent-hover);
        }
        .related-card-body p {
            font-size: .88rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 1rem;
            flex: 1;
        }
        .related-card-link {
            font-size: .86rem;
            font-weight: 700;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            transition: gap .2s ease;
        }
        .related-card-link:hover {
            gap: .7rem;
            color: var(--accent-hover);
        }

        /* ===== 功能特征条 ===== */
        .feature-strip {
            padding: 3rem 0;
            background: linear-gradient(135deg, #0b1f3a, #0f2a43);
            color: #fff;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        @media (min-width: 768px) {
            .feature-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        .feature-item {
            display: flex;
            gap: 1rem;
            padding: 1.4rem;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            transition: all .3s ease;
        }
        .feature-item:hover {
            background: rgba(255, 255, 255, .1);
            transform: translateY(-3px);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: rgba(200, 164, 110, .2);
            color: var(--accent);
            font-size: 1.2rem;
        }
        .feature-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: .35rem;
        }
        .feature-item p {
            font-size: .85rem;
            color: rgba(255, 255, 255, .75);
            line-height: 1.65;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 3.5rem 0;
            position: relative;
            background-size: cover;
            background-position: center;
        }
        .cta-card {
            background: #fff;
            border-radius: 20px;
            padding: 2.5rem 2rem;
            box-shadow: 0 16px 45px rgba(2, 12, 27, .12);
            text-align: center;
            border: 1px solid rgba(226, 232, 240, .5);
            position: relative;
            overflow: hidden;
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), #d4b583, var(--accent));
        }
        .cta-card h2 {
            font-size: 1.65rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: .5rem;
        }
        .cta-card p {
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 auto 1.6rem;
            font-size: .95rem;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: .8rem;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #071120;
            color: rgba(255, 255, 255, .75);
            padding: 3.5rem 0 1.6rem;
            font-size: .88rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            margin-bottom: 2.2rem;
        }
        @media (min-width: 640px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            }
        }
        .footer-brand h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: .6rem;
            margin-bottom: .8rem;
        }
        .footer-brand h3 i {
            color: var(--accent);
        }
        .footer-brand p {
            line-height: 1.7;
            color: rgba(255, 255, 255, .65);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
            position: relative;
            padding-bottom: .5rem;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: .5rem;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, .65);
            transition: all .2s ease;
        }
        .footer-col ul a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: .55rem;
            color: rgba(255, 255, 255, .65);
        }
        .footer-contact i {
            color: var(--accent);
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding-top: 1.4rem;
            text-align: center;
            color: rgba(255, 255, 255, .45);
            font-size: .82rem;
        }

        /* ===== 焦点可访问性 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        @media (max-width: 520px) {
            .banner-title {
                font-size: 1.5rem;
            }
            .article-card {
                padding: 1.2rem;
            }
            .cta-card {
                padding: 1.8rem 1.2rem;
            }
            .cta-buttons .btn-primary {
                width: 100%;
                justify-content: center;
            }
            .feature-item {
                padding: 1rem;
            }
        }

/* roulang page: category3 */
:root {
    --primary: #0f7a72;
    --primary-dark: #0d625d;
    --primary-light: #d7f3f0;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --radius: 0.875rem;
    --radius-lg: 1.25rem;
    --shadow-card: 0 4px 20px rgba(15, 122, 114, 0.08);
    --shadow-hover: 0 12px 32px rgba(15, 122, 114, 0.16);
    --transition-fast: all 0.25s ease;
    --transition-slow: all 0.4s ease;
  }

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

  html { scroll-behavior: smooth; }

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

  a { color: inherit; text-decoration: none; transition: var(--transition-fast); }
  img { max-width: 100%; height: auto; display: block; }
  button { font-family: inherit; cursor: pointer; }

  .container-custom {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
  }

  .text-link { color: var(--primary); }
  .text-link:hover { color: var(--primary-dark); text-decoration: underline; }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--primary);
    color: #fff;
    padding: 0.75rem 1.75rem;
    border-radius: 0.5rem;
    font-weight: 600;
    border: 2px solid transparent;
    transition: var(--transition-fast);
    box-shadow: 0 4px 14px rgba(15, 122, 114, 0.2);
  }
  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(15, 122, 114, 0.28);
  }
  .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(15, 122, 114, 0.2); }
  .btn-primary:focus-visible { outline: 3px solid rgba(15, 122, 114, 0.3); outline-offset: 2px; }

  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: transparent;
    color: var(--primary);
    padding: 0.75rem 1.75rem;
    border-radius: 0.5rem;
    font-weight: 600;
    border: 2px solid var(--primary);
    transition: var(--transition-fast);
  }
  .btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
  }
  .btn-outline:focus-visible { outline: 3px solid rgba(15, 122, 114, 0.3); outline-offset: 2px; }

  .card {
    background: var(--bg-white);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    transition: var(--transition-fast);
  }
  .card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.875rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
  }

  .section-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.3;
    letter-spacing: -0.01em;
  }

  .section-title span { color: var(--primary); }

  .section-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 640px;
  }

  .faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: #fff;
    overflow: hidden;
    transition: var(--transition-fast);
  }
  .faq-item:hover { border-color: var(--primary); box-shadow: var(--shadow-card); }
  .faq-item.active { border-color: var(--primary); box-shadow: var(--shadow-card); }
  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-main);
    user-select: none;
    background: transparent;
    width: 100%;
    text-align: left;
    border: none;
  }
  .faq-question:hover { color: var(--primary); }
  .faq-question .icon {
    width: 32px;
    height: 32px;
    min-width: 32px;
    border-radius: 9999px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    transition: var(--transition-fast);
  }
  .faq-item.active .faq-question .icon { background: var(--primary); color: #fff; transform: rotate(180deg); }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 1.5rem;
    color: var(--text-muted);
    line-height: 1.8;
    font-size: 0.9375rem;
  }
  .faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem;
  }

  .top-bar {
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-muted);
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-wrap: wrap;
  }
  .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--text-muted);
    transition: var(--transition-fast);
  }
  .nav-link:hover { color: var(--primary); background: var(--primary-light); }
  .nav-link.active {
    color: var(--primary);
    background: var(--primary-light);
    font-weight: 600;
  }
  .nav-link i { font-size: 0.875rem; }

  .site-header {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
  }

  .category-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
    background: #fff;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: var(--transition-fast);
    white-space: nowrap;
  }
  .category-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
  }
  .category-tab.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 4px 14px rgba(15, 122, 114, 0.28);
  }

  .footer-col h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: #d1d5db;
    margin-bottom: 1rem;
  }
  .footer-col ul { list-style: none; }
  .footer-col ul li { margin-bottom: 0.625rem; }
  .footer-col ul li a {
    color: #9ca3af;
    font-size: 0.875rem;
    transition: var(--transition-fast);
  }
  .footer-col ul li a:hover { color: #fff; padding-left: 4px; }
  .footer-contact li { color: #9ca3af; font-size: 0.875rem; }
  .footer-contact li i { color: var(--primary); width: 20px; margin-right: 4px; }

  .hero-back {
    background-image: linear-gradient(to bottom, rgba(13, 61, 58, 0.86), rgba(13, 98, 93, 0.78)), url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    position: relative;
  }

  .help-step {
    position: relative;
    padding-left: 3.5rem;
  }
  .help-step::before {
    content: '';
    position: absolute;
    left: 1rem;
    top: 2.5rem;
    bottom: -1.5rem;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-light), var(--border-color));
  }
  .help-step:last-child::before { display: none; }
  .step-number {
    position: absolute;
    left: 0;
    top: 0;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 9999px;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    box-shadow: 0 4px 12px rgba(15, 122, 114, 0.3);
    z-index: 1;
  }

  @media (max-width: 768px) {
    .container-custom { padding: 0 1rem; }
    .section-title { font-size: 1.5rem; }
    .main-nav { gap: 0.15rem; }
    .nav-link { padding: 0.375rem 0.625rem; font-size: 0.8125rem; }
    .top-bar { font-size: 0.75rem; }
  }

  @media (max-width: 520px) {
    .nav-link i { display: none; }
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 2rem;
  }
  @media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 640px) {
    .footer-grid { grid-template-columns: 1fr; }
  }