/* roulang page: index */
:root {
        --bg-base: #031018;
        --bg-soft: #071623;
        --panel: rgba(13, 28, 43, 0.6);
        --panel-strong: rgba(15, 32, 49, 0.82);
        --stroke: rgba(157, 196, 222, 0.14);
        --primary: #3bc4ff;
        --primary-deep: #0a5c9e;
        --accent: #7388ff;
        --success: #21d6a0;
        --warning: #f8b64e;
        --text-title: #e8f0f7;
        --text-body: #a7bbca;
        --muted: #62778a;
        --glow: rgba(59, 196, 255, 0.35);
        --radius-lg: 20px;
        --radius-md: 16px;
        --radius-sm: 12px;
        --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
        --font-num: Tahoma, Arial;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: var(--font-cn);
        font-size: 16px;
        line-height: 1.8;
        background-color: var(--bg-base);
        color: var(--text-body);
        -webkit-font-smoothing: antialiased;
        overflow-x: hidden;
    }

    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 1400px;
        height: 1400px;
        background: radial-gradient(ellipse at center, rgba(59, 196, 255, 0.08) 0%, transparent 65%);
        pointer-events: none;
        z-index: 0;
    }

    img {
        max-width: 100%;
        height: auto;
        border-style: none;
    }

    a {
        color: var(--primary);
        text-decoration: none;
        transition: color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
    }

    button, input, select, textarea {
        font-family: var(--font-cn);
    }

    .container {
        max-width: 1280px;
        margin: 0 auto;
        padding-left: 24px;
        padding-right: 24px;
    }

    .section {
        padding: 100px 0;
        position: relative;
    }

    .section-alt {
        background-color: var(--bg-soft);
    }

    .text-glow {
        color: var(--primary);
    }

    .section-header {
        margin-bottom: 40px;
    }

    .section-tag {
        display: inline-block;
        font-size: 13px;
        letter-spacing: 2px;
        text-transform: uppercase;
        color: var(--primary);
        background: rgba(59, 196, 255, 0.1);
        border: 1px solid rgba(59, 196, 255, 0.2);
        padding: 5px 16px;
        border-radius: 40px;
        margin-bottom: 16px;
    }

    .section-title {
        font-size: 34px;
        line-height: 1.4;
        font-weight: 700;
        color: var(--text-title);
        margin-bottom: 16px;
        letter-spacing: 0.5px;
    }

    .section-desc {
        font-size: 16px;
        line-height: 1.9;
        color: var(--text-body);
        max-width: 800px;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 14px 30px;
        border-radius: 40px;
        font-weight: 600;
        cursor: pointer;
        font-size: 15px;
        letter-spacing: 0.5px;
        transition: all 0.2s ease;
        border: 1px solid transparent;
        line-height: 1.4;
        gap: 8px;
    }

    .btn-primary {
        background: linear-gradient(135deg, #3ac9ff 0%, #0d8de0 100%);
        color: #fff;
        box-shadow: 0 0 24px rgba(59, 196, 255, 0.2), 0 4px 20px rgba(13, 141, 224, 0.25);
    }

    .btn-primary:hover {
        background: linear-gradient(135deg, #59d3ff 0%, #129ef5 100%);
        box-shadow: 0 0 34px rgba(59, 196, 255, 0.35), 0 8px 28px rgba(13, 141, 224, 0.3);
        transform: translateY(-2px);
        color: #fff;
    }

    .btn-primary:active {
        transform: translateY(0);
    }

    .btn-secondary {
        background: rgba(10, 24, 40, 0.5);
        border-color: rgba(157, 196, 222, 0.3);
        color: var(--text-title);
        backdrop-filter: blur(6px);
    }

    .btn-secondary:hover {
        background: rgba(255, 255, 255, 0.06);
        border-color: rgba(157, 196, 222, 0.5);
        color: #fff;
    }

    .btn-ghost {
        background: transparent;
        color: var(--text-body);
        padding-left: 0;
        padding-right: 0;
    }

    .btn-ghost:hover {
        color: var(--primary);
    }

    .btn-ghost .fa-arrow-right {
        transition: transform 0.2s ease;
    }

    .btn-ghost:hover .fa-arrow-right {
        transform: translateX(4px);
    }

    .glass-card {
        background: var(--panel);
        border: 1px solid var(--stroke);
        border-radius: var(--radius-lg);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    }

    .glass-card:hover {
        border-color: rgba(59, 196, 255, 0.3);
        box-shadow: 0 0 0 1px rgba(59, 196, 255, 0.08), 0 16px 42px rgba(0, 0, 0, 0.3);
    }

    /* ---------- Header ---------- */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 200;
        background: rgba(4, 12, 22, 0.82);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(157, 196, 222, 0.08);
        padding: 0;
        height: 72px;
        display: flex;
        align-items: center;
    }

    .site-header .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        width: 100%;
    }

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

    .logo-badge {
        width: 38px;
        height: 38px;
        border-radius: 10px;
        background: linear-gradient(135deg, #3ac9ff 0%, #0a5c9e 100%);
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 0 18px rgba(59, 196, 255, 0.35);
        color: #fff;
        font-size: 16px;
        font-wial: 700;
    }

    .logo-text {
        display: flex;
        flex-direction: column;
        line-height: 1.2;
    }

    .logo-text .cn-name {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-title);
        letter-spacing: 1px;
    }

    .logo-text .en-name {
        font-size: 10px;
        color: var(--muted);
        letter-spacing: 1.5px;
        text-transform: uppercase;
    }

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

    .site-header .main-nav a {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 8px 18px;
        font-size: 14px;
        color: #8899a7;
        border-radius: 6px;
        transition: color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
        gap: 8px;
        font-weight: 500;
    }

    .site-header .main-nav a .fa-bolt {
        font-size: 12px;
        color: var(--accent);
    }

    .site-header .main-nav a .fa-fire {
        font-size: 12px;
        color: var(--warning);
    }

    .site-header .main-nav a:hover {
        color: var(--primary);
    }

    .site-header .main-nav a.active {
        color: var(--primary);
        box-shadow: inset 0 -2px 0 var(--primary);
        background: transparent;
    }

    .header-actions {
        display: flex;
        align-items: center;
        gap: 8px;
        flex-shrink: 0;
    }

    .search-btn {
        display: flex;
        align-items: center;
        gap: 8px;
        background: rgba(157, 196, 222, 0.08);
        border: 1px solid rgba(157, 196, 222, 0.12);
        border-radius: 8px;
        padding: 8px 14px;
        font-size: 13px;
        color: var(--muted);
        cursor: pointer;
        min-width: 130px;
        justify-content: space-between;
        transition: background 0.2s ease, border-color 0.2s ease;
    }

    .search-btn:hover {
        background: rgba(157, 196, 222, 0.14);
        border-color: rgba(59, 196, 255, 0.3);
    }

    .search-btn .fa-command {
        color: var(--primary);
    }

    .header-actions .quick-link {
        font-size: 13px;
        padding: 8px 12px;
        color: #8899a7;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        border-radius: 8px;
        transition: background 0.2s;
        cursor: pointer;
    }

    .header-actions .quick-link:hover {
        color: var(--primary);
        background: rgba(157, 196, 222, 0.06);
    }

    .header-actions .quick-link .dot {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--success);
    }

    .header-cta {
        background: linear-gradient(135deg, #3ac9ff 0%, #0d8de0 100%);
        color: #fff !important;
        padding: 10px 20px !important;
        font-size: 13px !important;
        border-radius: 32px !important;
        box-shadow: 0 0 14px rgba(59, 196, 255, 0.25);
        transition: all 0.2s ease !important;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .header-cta:hover {
        box-shadow: 0 0 24px rgba(59, 196, 255, 0.4);
        transform: translateY(-1px);
        color: #fff !important;
        background: linear-gradient(135deg, #59d3ff 0%, #129ef5 100%) !important;
    }

    /* Hamburger */
    .hamburger-btn {
        display: none;
        background: transparent;
        border: 1px solid rgba(157, 196, 222, 0.2);
        padding: 8px 12px;
        border-radius: 8px;
        cursor: pointer;
        color: var(--text-title);
        font-size: 18px;
        transition: background 0.2s;
    }

    .hamburger-btn:hover {
        background: rgba(157, 196, 222, 0.1);
    }

    .mobile-menu {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(4, 12, 22, 0.97);
        backdrop-filter: blur(20px);
        z-index: 199;
        padding: 16px 0 32px;
        box-shadow: 0 24px 40px rgba(0, 0, 0, 0.5);
        border-bottom: 1px solid rgba(157, 196, 222, 0.1);
    }

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

    .mobile-menu .inner-links {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    .mobile-menu .mobile-nav-link {
        padding: 12px 24px;
        font-size: 16px;
        color: var(--text-body);
        display: flex;
        align-items: center;
        gap: 10px;
        border-radius: 8px;
        cursor: pointer;
    }

    .mobile-menu .mobile-nav-link:hover,
    .mobile-menu .mobile-nav-link.active {
        background: rgba(59, 196, 255, 0.08);
        color: var(--primary);
    }

    /* ---------- Hero ---------- */
    .hero-section {
        position: relative;
        min-height: 700px;
        display: flex;
        align-items: center;
        padding: 80px 0;
        overflow: hidden;
    }

    .hero-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(3, 16, 24, 0.85) 0%, rgba(7, 22, 35, 0.7) 60%, rgba(3, 16, 24, 0.9) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
        z-index: -1;
    }

    .hero-grid {
        display: grid;
        grid-template-columns: 1.1fr 0.9fr;
        gap: 60px;
        align-items: center;
    }

    .hero-tag {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 6px 18px;
        border-radius: 40px;
        background: rgba(59, 196, 255, 0.1);
        border: 1px solid rgba(59, 196, 255, 0.2);
        font-size: 13px;
        color: var(--primary);
        margin-bottom: 24px;
    }

    .hero-tag .pulse-dot {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--success);
        animation: pulse 2s infinite;
    }

    @keyframes pulse {
        0%, 100% { opacity: 1; }
        50% { opacity: 0.4; }
    }

    .hero-title {
        font-size: 51px;
        line-height: 1.25;
        font-weight: 700;
        color: #fff;
        margin-bottom: 20px;
        letter-spacing: 0.5px;
    }

    .hero-title .text-hl {
        background: linear-gradient(135deg, #3bc4ff, #9edcf8);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .hero-desc {
        font-size: 18px;
        line-height: 1.9;
        color: rgba(167, 187, 202, 0.95);
        max-width: 580px;
        margin-bottom: 32px;
    }

    .hero-actions {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
        margin-bottom: 32px;
        align-items: center;
    }

    .hero-metric-badge {
        display: flex;
        align-items: center;
        gap: 8px;
        background: rgba(157, 196, 222, 0.06);
        border: 1px solid rgba(157, 196, 222, 0.12);
        border-radius: 40px;
        padding: 8px 20px;
        font-size: 14px;
        color: #c6d5df;
    }

    .hero-metric-badge .fa-circle {
        font-size: 6px;
        color: var(--warning);
    }

    /* Hero Dashboard Right */
    .dashboard-area {
        position: relative;
    }

    .dashboard-card {
        background: rgba(10, 26, 42, 0.75);
        border: 1px solid rgba(157, 196, 222, 0.1);
        border-radius: var(--radius-lg);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
        padding: 28px;
        position: relative;
        z-index: 1;
    }

    .dashboard-card .card-head {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 22px;
    }

    .dashboard-card .card-title {
        font-size: 14px;
        color: var(--muted);
        letter-spacing: 1px;
    }

    .dashboard-card .live-tag {
        display: flex;
        align-items: center;
        gap: 6px;
        font-size: 12px;
        color: var(--success);
        background: rgba(33, 214, 160, 0.1);
        padding: 4px 12px;
        border-radius: 20px;
    }

    .metric-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 14px 0;
        border-bottom: 1px solid rgba(157, 196, 222, 0.08);
    }

    .metric-row:last-child {
        border-bottom: none;
    }

    .metric-left {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .metric-left .fa-dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        flex-shrink: 0;
    }

    .metric-label {
        font-size: 14px;
        color: var(--text-body);
    }

    .metric-value {
        font-family: var(--font-num);
        font-variant-numeric: tabular-nums;
        font-weight: 700;
        font-size: 18px;
        color: var(--text-title);
        display: flex;
        align-items: baseline;
        gap: 6px;
    }

    .metric-value .status-up {
        color: var(--success);
        font-size: 12px;
    }

    .metric-value .status-warn {
        color: var(--warning);
        font-size: 12px;
    }

    /* ---------- Countdown ---------- */
    .countdown-strip {
        background: rgba(10, 26, 42, 0.6);
        backdrop-filter: blur(8px);
        border: 1px solid rgba(157, 196, 222, 0.1);
        border-radius: var(--radius-md);
        padding: 18px 24px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        font-size: 14px;
        color: var(--text-body);
        margin-top: 24px;
        flex-wrap: wrap;
    }

    .countdown-items {
        display: flex;
        gap: 24px;
    }

    .countdown-item {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .countdown-item strong {
        font-family: var(--font-num);
        font-size: 20px;
        color: var(--primary);
        font-variant-numeric: tabular-nums;
    }

    .countdown-label {
        color: var(--muted);
        font-size: 13px;
    }

    /* ---------- Metrics Bar ---------- */
    .metrics-bar {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        margin-top: 10px;
        position: relative;
        z-index: 2;
    }

    .metric-item {
        background: rgba(8, 20, 36, 0.9);
        border: 1px solid rgba(157, 196, 222, 0.08);
        border-radius: var(--radius-md);
        padding: 20px 20px;
        text-align: center;
        backdrop-filter: blur(8px);
        transition: border-color 0.2s ease, transform 0.2s;
    }

    .metric-item:hover {
        transform: translateY(-2px);
        border-color: rgba(59, 196, 255, 0.2);
    }

    .metric-item .metric-num {
        font-family: var(--font-num);
        font-size: 30px;
        font-weight: 700;
        color: var(--text-title);
        line-height: 1.2;
        font-variant-numeric: tabular-nums;
        display: flex;
        justify-content: center;
        align-items: baseline;
        gap: 4px;
    }

    .metric-item .metric-num i {
        font-style: normal;
        font-size: 18px;
        color: var(--primary);
    }

    .metric-item .metric-label {
        color: var(--muted);
        font-size: 13px;
        margin-top: 4px;
        letter-spacing: 1px;
    }

    /* ---------- Glass Card general ---------- */
    .card-general {
        background: var(--panel);
        border: 1px solid var(--stroke);
        border-radius: var(--radius-lg);
        padding: 30px;
        transition: all 0.2s ease;
    }

    .card-general:hover {
        border-color: rgba(59, 196, 255, 0.25);
        box-shadow: 0 18px 40px rgba(0, 0, 0, 0.25);
    }

    /* ---------- Service Matrix (Bento) ---------- */
    .bento-grid {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        grid-auto-rows: minmax(170px, auto);
        gap: 20px;
    }

    .bento-card {
        background: var(--panel);
        border: 1px solid var(--stroke);
        border-radius: var(--radius-lg);
        padding: 28px;
        position: relative;
        overflow: hidden;
        transition: border-color 0.2s ease, box-shadow 0.2s ease;
        min-height: 170px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        backdrop-filter: blur(8px);
    }

    .bento-card:hover {
        border-color: rgba(59, 196, 255, 0.3);
        box-shadow: 0 0 0 1px rgba(59, 196, 255, 0.08), 0 16px 42px rgba(0, 0, 0, 0.3);
    }

    .bento-card.wide {
        grid-column: span 2;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 24px;
    }

    .bento-card.wide .bento-content {
        flex: 1;
    }

    .bento-card.wide .bento-visual {
        flex: 1;
        height: 120px;
        background: url('/assets/images/coverpic/cover-2.png') center/cover no-repeat;
        border-radius: var(--radius-sm);
        border: 1px solid rgba(157, 196, 222, 0.1);
    }

    .bento-icon {
        width: 48px;
        height: 48px;
        border-radius: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        background: rgba(59, 196, 255, 0.1);
        border: 1px solid rgba(59, 196, 255, 0.15);
        color: var(--primary);
        margin-bottom: 14px;
    }

    .bento-title {
        font-size: 20px;
        font-weight: 600;
        color: var(--text-title);
        margin-bottom: 8px;
        line-height: 1.4;
    }

    .bento-desc {
        font-size: 14px;
        line-height: 1.7;
        color: var(--muted);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .bento-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        color: var(--primary);
        font-size: 14px;
        cursor: pointer;
        transition: opacity 0.2s;
        margin-top: 10px;
    }

    .bento-link:hover {
        opacity: 0.8;
    }

    .bento-link .fa-arrow-right {
        font-size: 12px;
        transition: transform 0.2s;
    }

    .bento-link:hover .fa-arrow-right {
        transform: translateX(4px);
    }

    /* Success story image block */
    .bento-tall-image {
        grid-row: span 2;
        background: url('/assets/images/coverpic/cover-4.webp') center/cover no-repeat;
        border-radius: var(--radius-lg);
        border: 1px solid var(--stroke);
        min-height: 260px;
        position: relative;
        overflow: hidden;
    }

    .bento-tall-image .overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(3, 16, 24, 0.15) 0%, rgba(3, 16, 24, 0.85) 80%);
        padding: 24px;
        display: flex;
        align-items: flex-end;
    }

    .bento-tall-image .overlay .photo-tag {
        color: #fff;
        font-size: 16px;
        font-weight: 600;
        line-height: 1.5;
    }

    /* ---------- Compared Cards ---------- */
    .compare-block {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
        margin: 24px 0;
    }

    .compare-box {
        border-radius: var(--radius-lg);
        padding: 30px;
        background: rgba(157, 196, 222, 0.02);
    }

    .compare-box.before-box {
        border: 1px solid rgba(157, 196, 222, 0.08);
    }

    .compare-box.after-box {
        background: rgba(13, 35, 55, 0.7);
        border: 1px solid rgba(59, 196, 255, 0.2);
        box-shadow: 0 0 34px rgba(59, 196, 255, 0.06);
    }

    .compare-box .compare-label-title {
        font-size: 13px;
        color: var(--muted);
        letter-spacing: 2px;
        margin-bottom: 14px;
        text-transform: uppercase;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .compare-box.after-box .compare-label-title {
        color: var(--primary);
    }

    .compare-table-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 10px 0;
        border-bottom: 1px solid rgba(157, 196, 222, 0.05);
        gap: 16px;
    }

    .compare-table-row:last-child {
        border-bottom: none;
    }

    .compare-table-row .row-label {
        color: var(--text-body);
        font-size: 14px;
    }

    .compare-table-row .row-value {
        font-family: var(--font-num);
        font-weight: 600;
        font-size: 18px;
        color: var(--text-title);
        font-variant-numeric: tabular-nums;
    }

    .compare-table-row .row-value.bad {
        color: var(--muted);
        text-decoration: line-through;
        text-decoration-color: rgba(248, 182, 78, 0.4);
    }

    .compare-table-row .row-value.good {
        color: var(--success);
    }

    .compare-divider {
        text-align: center;
        padding: 12px 0;
        font-size: 20px;
        color: var(--primary);
        position: relative;
    }

    .compare-divider .fa-arrow-right {
        background: rgba(5, 18, 30, 0.9);
        padding: 8px 14px;
        border-radius: 50%;
        border: 1px solid rgba(59, 196, 255, 0.2);
        box-shadow: 0 0 18px rgba(59, 196, 255, 0.2);
    }

    /* ---------- News List / CMS board ---------- */
    .news-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .news-item {
        display: flex;
        align-items: center;
        gap: 20px;
        padding: 18px 20px;
        border-radius: var(--radius-md);
        transition: background 0.2s ease, border-color 0.2s ease;
        background: rgba(157, 196, 222, 0.02);
        border: 1px solid rgba(157, 196, 222, 0.06);
        cursor: pointer;
    }

    .news-item:hover {
        background: rgba(59, 196, 255, 0.05);
        border-color: rgba(59, 196, 255, 0.14);
    }

    .news-item .news-thumb {
        width: 180px;
        height: 90px;
        border-radius: var(--radius-sm);
        background: linear-gradient(135deg, rgba(59, 196, 255, 0.15), transparent);
        border: 1px dashed rgba(157, 196, 222, 0.16);
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        color: #2d4859;
        font-size: 24px;
        overflow: hidden;
    }

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

    .news-item .news-title {
        font-size: 16px;
        color: var(--text-title);
        font-weight: 600;
        line-height: 1.4;
        margin-bottom: 4px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        cursor: pointer;
    }

    .news-item .news-summary {
        font-size: 14px;
        color: var(--muted);
        overflow: hidden;
        text-overflow: ellipsis;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
    }

    .news-meta {
        display: flex;
        flex-direction: column;
        align-items: flex-end;
        gap: 8px;
        flex-shrink: 0;
    }

    .news-meta .news-tag {
        display: inline-block;
        font-size: 12px;
        padding: 3px 12px;
        border-radius: 20px;
        background: rgba(59, 196, 255, 0.08);
        border: 1px solid rgba(59, 196, 255, 0.15);
        color: var(--primary);
        cursor: pointer;
        white-space: nowrap;
    }

    .news-meta .news-time {
        font-size: 12px;
        color: var(--muted);
        font-family: var(--font-num);
    }

    .news-item:hover .news-title {
        color: var(--primary);
    }

    .empty-state {
        text-align: center;
        padding: 60px 20px;
        color: var(--muted);
        background: rgba(157, 196, 222, 0.03);
        border: 1px dashed rgba(157, 196, 222, 0.1);
        border-radius: var(--radius-lg);
        width: 100%;
    }

    .empty-state .fa-inbox {
        font-size: 32px;
        margin-bottom: 12px;
        opacity: 0.6;
    }

    /* ---------- Accordion FAQ ---------- */
    .faq-container {
        max-width: 860px;
        margin: 0 auto;
    }

    .faq-item {
        background: var(--panel);
        border: 1px solid var(--stroke);
        border-radius: var(--radius-md);
        margin-bottom: 10px;
        padding: 0;
        transition: border-color 0.2s ease;
    }

    .faq-item.open {
        border-color: rgba(59, 196, 255, 0.25);
    }

    .faq-question {
        width: 100%;
        background: transparent;
        border: none;
        padding: 20px 24px;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        text-align: left;
        color: var(--text-title);
        font-size: 16px;
        font-weight: 500;
        line-height: 1.4;
    }

    .faq-icon {
        width: 24px;
        height: 24px;
        border-radius: 50%;
        border: 1px solid rgba(59, 196, 255, 0.3);
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        transition: all 0.2s ease;
        color: var(--primary);
        font-size: 14px;
        cursor: pointer;
    }

    .faq-item.open .faq-icon {
        transform: rotate(45deg);
    }

    .faq-answer {
        padding: 0 24px;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
        font-size: 14px;
        line-height: 1.8;
        color: var(--text-body);
    }

    .faq-item.open .faq-answer {
        padding: 0 24px 20px;
        max-height: 300px;
    }

    /* ---------- Form CTA Section ---------- */
    .cta-section {
        background: transparent;
        position: relative;
    }

    .cta-section:before {
        content: '';
        position: absolute;
        left: 0;
        right: 0;
        height: 100%;
        background: radial-gradient(ellipse at bottom, rgba(115, 136, 255, 0.15) 0%, transparent 65%);
        top: 0;
        pointer-events: none;
    }

    .cta-layout {
        display: grid;
        grid-template-columns: 1fr 0.9fr;
        gap: 60px;
        align-items: center;
        position: relative;
    }

    .cta-copy .section-title {
        margin-bottom: 12px;
    }

    .cta-copy .cta-list {
        list-style: none;
        padding: 0;
        margin: 24px 0;
    }

    .cta-copy .cta-list li {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--text-body);
        margin-bottom: 12px;
        font-size: 15px;
    }

    .cta-copy .cta-list li i {
        color: var(--primary);
        font-size: 12px;
    }

    .cta-form-card {
        background: var(--panel-strong);
        border: 1px solid var(--stroke);
        border-radius: var(--radius-lg);
        padding: 32px;
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    }

    .cta-form-card .form-title {
        color: var(--text-title);
        font-size: 20px;
        font-weight: 600;
        margin-bottom: 6px;
    }

    .cta-form-card label {
        color: var(--text-body);
        font-size: 13px;
        margin-bottom: 4px;
    }

    .cta-form-card input,
    .cta-form-card textarea,
    .cta-form-card select {
        width: 100%;
        background: rgba(157, 196, 222, 0.05);
        border: 1px solid rgba(157, 196, 222, 0.12);
        padding: 12px 16px;
        border-radius: 10px;
        color: #d5e2ea;
        font-size: 14px;
        outline: none;
        transition: border-color 0.2s ease, box-shadow 0.2s ease;
        margin-bottom: 16px;
        font-family: var(--font-cn);
    }

    .cta-form-card input::placeholder,
    .cta-form-card textarea::placeholder {
        color: rgba(98, 119, 138, 0.6);
    }

    .cta-form-card input:focus,
    .cta-form-card textarea:focus,
    .cta-form-card select:focus {
        border-color: rgba(59, 196, 255, 0.4);
        box-shadow: 0 0 0 3px rgba(59, 196, 255, 0.12);
    }

    .cta-form-card textarea {
        min-height: 70px;
        resize: vertical;
    }

    .cta-form-card select {
        appearance: none;
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23a7bbca' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 16px center;
        padding-right: 36px;
        cursor: pointer;
    }

    .cta-form-card select option {
        background: rgba(15, 32, 49, 0.98);
        color: #d5e2ea;
    }

    .cta-form-card .btn-primary {
        width: 100%;
        justify-content: center;
        margin-top: 4px;
    }

    .form-note {
        font-size: 12px;
        color: var(--muted);
        margin-top: 10px;
        text-align: center;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
    }

    .form-note .fa-shield {
        color: var(--primary);
        font-size: 11px;
    }

    /* ---------- Footer ---------- */
    .site-footer {
        background: #020c15;
        border-top: 1px solid rgba(157, 196, 222, 0.07);
        padding: 70px 0 0;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
        gap: 40px;
        padding-bottom: 40px;
    }

    .footer-brand .footer-logo-txt {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 14px;
    }

    .footer-brand .footer-logo-txt .logo-badge {
        width: 34px;
        height: 34px;
        font-size: 15px;
    }

    .footer-brand .foot-slogan {
        color: var(--muted);
        font-size: 14px;
        line-height: 1.9;
        margin-bottom: 18px;
    }

    .footer-col-title {
        font-size: 14px;
        color: var(--text-title);
        font-weight: 600;
        margin-bottom: 14px;
        letter-spacing: 2px;
    }

    .footer-col-list a {
        display: block;
        padding: 5px 0;
        color: var(--muted);
        font-size: 14px;
        transition: color 0.2s;
        cursor: pointer;
    }

    .footer-col-list a:hover {
        color: var(--primary);
    }

    .footer-subscribe .subscribe-desc {
        font-size: 13px;
        color: var(--muted);
        margin-bottom: 12px;
    }

    .subscribe-input-group {
        display: flex;
        gap: 8px;
    }

    .subscribe-input-group input {
        flex: 1;
        background: rgba(157, 196, 222, 0.05);
        border: 1px solid rgba(157, 196, 222, 0.1);
        border-radius: 8px;
        padding: 8px 14px;
        color: var(--text-title);
        font-size: 13px;
        outline: none;
        transition: border-color 0.2s;
    }

    .subscribe-input-group input:focus {
        border-color: rgba(59, 196, 255, 0.4);
    }

    .footer-bottom {
        border-top: 1px solid rgba(157, 196, 222, 0.06);
        padding: 18px 0;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        align-items: center;
        gap: 12px;
        color: var(--muted);
        font-size: 13px;
    }

    .footer-bottom .copy a {
        color: var(--muted);
        cursor: pointer;
    }

    .footer-bottom .copy a:hover {
        color: var(--primary);
    }

    .footer-bottom .status-line {
        display: flex;
        gap: 16px;
        align-items: center;
    }

    .footer-status-dot {
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .footer-status-dot .dot {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--success);
    }

    /* ---------- Floating search modal ---------- */
    .search-overlay {
        position: fixed;
        inset: 0;
        z-index: 400;
        background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(6px);
        display: none;
        align-items: flex-start;
        justify-content: center;
        padding-top: 15vh;
    }

    .search-overlay.open {
        display: flex;
    }

    .search-panel {
        background: rgba(10, 26, 42, 0.96);
        border: 1px solid rgba(157, 196, 222, 0.16);
        border-radius: var(--radius-lg);
        padding: 24px;
        width: 320px;
        box-shadow: 0 28px 60px rgba(0, 0, 0, 0.5);
    }

    .search-panel input {
        width: 100%;
        padding: 10px 14px;
        background: rgba(157, 196, 222, 0.06);
        border: 1px solid rgba(59, 196, 255, 0.25);
        border-radius: 10px;
        color: #e8f0f7;
        font-size: 14px;
        margin-bottom: 14px;
        outline: none;
    }

    .search-panel .search-shortcuts {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
    }

    .search-panel .shortcut-chip {
        font-size: 13px;
        color: var(--muted);
        background: rgba(157, 196, 222, 0.07);
        border: 1px solid rgba(157, 196, 222, 0.1);
        padding: 4px 14px;
        border-radius: 20px;
        cursor: pointer;
        transition: background 0.2s;
    }

    .search-panel .shortcut-chip:hover {
        background: rgba(157, 196, 222, 0.15);
        color: var(--primary);
    }

    /* ---------- Responsive ---------- */
    @media (max-width: 1024px) {
        .container {
            padding-left: 20px;
            padding-right: 20px;
        }

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

        .hero-title {
            font-size: 44px;
        }

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

        .bento-card.wide {
            grid-column: span 2;
            flex-direction: column;
            align-items: flex-start;
        }

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

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

        .main-nav {
            display: none;
        }

        .hamburger-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .search-btn {
            display: none;
        }
    }

    @media (max-width: 768px) {
        .section {
            padding: 60px 0;
        }

        .section-title {
            font-size: 28px;
        }

        .hero-title {
            font-size: 38px;
        }

        .hero-desc {
            font-size: 16px;
        }

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

        .bento-card.wide {
            grid-column: span 1;
        }

        .compare-block {
            grid-template-columns: 1fr;
        }

        .news-item {
            flex-direction: column;
            align-items: flex-start;
            gap: 12px;
        }

        .metrics-bar {
            grid-template-columns: 1fr 1fr;
        }

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

        .header-cta {
            display: none;
        }
    }

    @media (max-width: 520px) {
        .header-actions .quick-link {
            display: none;
        }
        .hero-actions {
            flex-direction: column;
            gap: 10px;
            width: 100%;
        }
        .hero-actions .btn {
            width: 100%;
            text-align: center;
        }
        .hero-count {
            padding: 12px;
        }

        .bento-card {
            padding: 20px;
        }

        .cta-form-card {
            padding: 22px;
        }
        .metrics-bar {
            grid-template-columns: 1fr;
        }
    }

/* roulang page: category1 */
:root {
            --bg-base: #031018;
            --bg-soft: #071623;
            --panel: rgba(13, 28, 43, 0.55);
            --panel-strong: rgba(15, 32, 49, 0.82);
            --stroke: rgba(157, 196, 222, 0.14);
            --stroke-bright: rgba(59, 196, 255, 0.3);
            --primary: #3bc4ff;
            --primary-deep: #0a5c9e;
            --accent: #7388ff;
            --success: #21d6a0;
            --warning: #f8b64e;
            --text-title: #e8f0f7;
            --text-body: #a7bbca;
            --text-muted: #62778a;
            --glow: rgba(59, 196, 255, 0.35);
            --radius: 16px;
            --radius-lg: 22px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
            background: var(--bg-base);
            color: var(--text-body);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: fixed;
            inset: 0;
            background: radial-gradient(ellipse 60% 40% at 15% 0%, rgba(59, 196, 255, 0.12), transparent 60%),
                        radial-gradient(ellipse 40% 35% at 85% 20%, rgba(115, 136, 255, 0.07), transparent 60%);
            pointer-events: none;
            z-index: 0;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
            position: relative;
            z-index: 2;
        }

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

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

        i {
            color: inherit;
        }

        .fa,
        .fas,
        .far {
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
        }

        .section-pad {
            padding: 100px 0;
            position: relative;
        }

        .section-pad-sm {
            padding: 64px 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: rgba(59, 196, 255, 0.08);
            border: 1px solid rgba(59, 196, 255, 0.18);
            padding: 6px 16px;
            border-radius: 40px;
            font-weight: 500;
            margin-bottom: 18px;
            text-transform: uppercase;
        }

        .section-label i {
            font-size: 11px;
        }

        .h2-s {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-title);
            line-height: 1.35;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-body);
            max-width: 760px;
            line-height: 1.85;
        }

        .txt-gradient {
            background: linear-gradient(135deg, #60d5ff 10%, #8d9cff 90%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        /* ---------- Header ---------- */
        .topbar {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(4, 12, 22, 0.78);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(157, 196, 222, 0.1);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .topbar-inner {
            display: flex;
            width: 100%;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            gap: 20px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }

        .logo-badge {
            width: 32px;
            height: 32px;
            background: linear-gradient(130deg, #3bc4ff, #0a5c9e);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 14px;
            box-shadow: 0 0 12px rgba(59, 196, 255, 0.2);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
            margin-left: 4px;
        }

        .logo-text .cn-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-title);
            letter-spacing: 0.01em;
        }

        .logo-text .en-sub {
            font-size: 10px;
            color: var(--text-muted);
            letter-spacing: 0.08em;
            font-family: Tahoma, Arial, sans-serif;
        }

        .main-nav {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 34px;
            margin: 0 auto;
        }

        .main-nav a {
            font-size: 15px;
            font-weight: 400;
            color: var(--text-body);
            padding: 8px 2px;
            position: relative;
            transition: color 0.2s ease;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .main-nav a i {
            color: var(--primary);
            font-size: 12px;
        }

        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), transparent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
        }

        .main-nav a:hover {
            color: var(--text-title);
        }

        .main-nav a:hover::after {
            transform: scaleX(1);
        }

        .main-nav a.active {
            color: var(--text-title);
            font-weight: 500;
        }

        .main-nav a.active::after {
            transform: scaleX(1);
        }

        .topbar-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .command-search {
            height: 38px;
            display: flex;
            align-items: center;
            gap: 5px;
            background: rgba(157, 196, 222, 0.06);
            border: 1px solid rgba(157, 196, 222, 0.14);
            border-radius: 999px;
            padding: 0 15px;
            font-size: 13px;
            color: var(--text-muted);
            cursor: pointer;
            transition: all 0.2s ease;
            white-space: nowrap;
            min-width: 160px;
        }

        .command-search i {
            font-size: 11px;
            color: var(--primary);
        }

        .command-search span {
            color: var(--text-muted);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
        }

        .command-search:hover {
            border-color: rgba(59, 196, 255, 0.4);
            background: rgba(59, 196, 255, 0.05);
        }

        .quick-link {
            font-size: 13px;
            color: var(--text-body);
            white-space: nowrap;
            transition: color 0.2s;
            padding: 4px 6px;
        }

        .quick-link:hover {
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 10px;
            font-weight: 500;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            font-family: inherit;
            white-space: nowrap;
            outline: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, #3ac9ff 0%, #0d8de0 60%, #0a5c9e 100%);
            color: #fff;
            padding: 12px 24px;
            font-size: 15px;
            box-shadow: 0 0 16px rgba(59, 196, 255, 0.18), 0 6px 12px rgba(0, 0, 0, 0.2);
            border-radius: 10px;
        }

        .btn-primary:hover {
            filter: brightness(1.1);
            transform: translateY(-2px);
            box-shadow: 0 0 26px rgba(59, 196, 255, 0.35), 0 8px 18px rgba(0, 0, 0, 0.25);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(157, 196, 222, 0.22);
            color: var(--text-body);
            padding: 11px 24px;
            font-size: 15px;
        }

        .btn-ghost:hover {
            border-color: rgba(59, 196, 255, 0.5);
            color: var(--text-title);
            background: rgba(59, 196, 255, 0.05);
        }

        .btn-outline {
            background: rgba(157, 196, 222, 0.04);
            border: 1px solid rgba(157, 196, 222, 0.2);
            color: var(--primary);
            padding: 8px 18px;
            font-size: 14px;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(59, 196, 255, 0.08);
        }

        .btn .arrow {
            display: inline-block;
            transition: transform 0.3s;
            font-size: 13px;
        }

        .btn:hover .arrow {
            transform: translateX(4px);
        }

        .header-cta {
            padding: 10px 22px;
            font-size: 14px;
            color: #fff;
        }

        .header-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--success);
            display: inline-block;
            box-shadow: 0 0 8px rgba(33, 214, 160, 0.5);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: 1px solid rgba(157, 196, 222, 0.2);
            color: var(--text-title);
            font-size: 18px;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }

        .btn-header-sm {
            padding: 9px 19px;
            font-size: 14px;
        }

        /* ---------- Hero ---------- */
        .hero-race {
            position: relative;
            padding: 96px 0 76px;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.35;
            z-index: 0;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(3, 16, 24, 0.93) 20%, rgba(3, 16, 24, 0.68) 60%, rgba(3, 16, 24, 0.42) 100%);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(10, 40, 60, 0.6);
            border: 1px solid rgba(59, 196, 255, 0.24);
            border-radius: 40px;
            padding: 6px 18px;
            font-size: 13px;
            color: #a7d7ee;
            margin-bottom: 24px;
            backdrop-filter: blur(10px);
        }

        .hero-badge .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--success);
            box-shadow: 0 0 8px rgba(33, 214, 160, 0.6);
            flex-shrink: 0;
            animation: pulseDot 2.8s infinite;
        }

        @keyframes pulseDot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.45; }
        }

        .hero-ctn {
            display: flex;
            gap: 60px;
            justify-content: space-between;
            align-items: center;
        }

        .hero-left {
            flex: 1 1 54%;
            max-width: 680px;
        }

        .hero-left h1 {
            font-size: 46px;
            color: var(--text-title);
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: -0.02em;
            margin: 0 0 24px;
        }

        .hero-left h1 .line-block {
            display: block;
        }

        .hero-left .sub {
            color: var(--text-body);
            font-size: 17px;
        }

/* ---------- 响应式 navigation ---------- */
        .main-nav.m-nav-open {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: rgba(4, 12, 22, 0.97);
            padding: 22px 24px;
            gap: 10px;
            align-items: flex-start;
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(59, 196, 255, 0.14);
            z-index: 10;
        }

        .main-nav.m-nav-open a {
            display: block;
            padding: 10px 0;
            width: 100%;
            font-size: 17px;
            border-bottom: 1px solid rgba(157,196,222,0.06);
        }

        @media (max-width: 980px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(4,12,22,0.97);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 14px 25px 25px;
                z-index: 12;
                border-bottom: 1px solid rgba(157,196,222,0.1);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                font-size: 18px;
                padding: 12px 0px;
                border-bottom: 1px solid rgba(157,196,222,0.07);
            }
            .menu-toggle {
                display: flex !important;
            }
            .command-search {
                display: none;
            }
            .quick-link {
                display: none;
            }
            .hero-ctn {
                flex-direction: row;
                align-items: flex-start;
            }
            .hero-left h1 {
                font-size: 36px;
            }
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .section-pad {
                padding: 78px 0;
            }
        }

        @media (max-width: 640px) {
            .topbar-inner {
                height: 62px;
                padding: 0 16px;
            }
            .logo-text .cn-title {
                font-size: 17px;
            }
            .btn-header-sm {
                display: none;
            }
            .hero-left h1 {
                font-size: 29px;
                margin-bottom: 15px;
            }
            .hero-race {
                padding: 36px 0 35px;
            }
            .section-pad {
                padding: 56px 0;
            }
        }

        /* 卡片、动作细调整 */
        .question-open {}
        .fa-plus {
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            transition: transform 0.22s ease;
        }
        div[onclick]:hover .fa-plus {
            color: #28e0ff;
        }

        /* footer css */
        .site-footer {
            background: #030b10;
            padding: 65px 0 34px;
            border-top: 1px solid rgba(157,196,222,0.1);
            margin-top: 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.9fr 1fr 1.2fr 1.4fr;
            gap: 40px;
            border-bottom: 1px solid rgba(157,196,222,0.07);
            padding-bottom: 45px;
            margin-bottom: 22px;
        }
        .footer-logo-txt {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .foot-slogan {
            font-size: 14px;
            color: #8096a7;
            margin-top: 18px;
            max-width: 280px;
            line-height: 1.85;
        }
        .footer-col-title {
            font-size: 15px;
            font-weight: 600;
            color: #c3dceb;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .footer-col-list {
            display: flex;
            flex-direction: column;
            gap: 9px;
        }
        .footer-col-list a {
            color: #637a8d;
            font-size: 14px;
            text-decoration: none;
        }
        .footer-col-list a:hover {
            color: #7dcbff;
        }
        .subscribe-desc {
            font-size: 13px;
            color: #62778a;
            margin-bottom: 15px;
        }
        .footer-subscribe input[type=email] {
            flex: 1;
            background: rgba(157,196,222,0.05);
            border: 1px solid rgba(157,196,222,0.15);
            min-width: 0;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
        }
        .copy {
            font-size: 13px;
            color: #4c6170;
        }   
        .copy a {
            color: #7c9fb5;
            text-decoration: none;
        }
        .status-line {
            color: #637f92;
            font-size: 12px;
            display: flex;
            align-items: center;
        }
        .footer-status-dot .dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            background: var(--success);
            border-radius: 50%;
            margin-right: 6px;
            box-shadow: 0 0 8px rgba(33,214,160,0.5);
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 600px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 25px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        .btn-outline {
            color: #b9cedc;
        }
        .btn-header-sm .header-dot {
            margin-right: 8px;
        }

.que-ans {
            transition: none;
        }
        /* 修正 FontAwesome unicode */
        .fa-regular.fa-command,
        .fa-regular.fa-diagram-project,
        .fa-regular.fa-trophy,
        .fa-regular.fa-ranking-star {
            font-family: 'Font Awesome 6 Free';
            font-weight: 400;
        }
        body .main-nav a i, body .section-label i, body .footer-logo-txt i, body .quick-link i, body .header-dot {
            font-style: normal;
        }

        .fa-regular::before {
            font-family: 'Font Awesome 6 Free';
            font-weight: 400;
        }
        .fa-solid::before {
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
        }

        i[class*="fa-"] {
            font-family: 'Font Awesome 6 Free' !important;
        }

        i.fa-bars::before {
            content: "\f0c9";
        }
        i.fa-xmark::before {
            content: "\f00d";
        }
        i.fa-plus::before {
            content: "+";
            font-family: 'Font Awesome 6 Free' !important;
            font-weight: 900;
        }
        i.fa-fire::before {
            content: "\f06d";
        }
        i.fa-bolt::before {
            content: "\f0e7";
        }
        i.fa-shield-halved::before {
            content: "\f3ed";
        }
        i.fa-check::before {
            content: "\f00c";
        }
        i.fa-arrow-right::before {
            content: "\f061";
        }
        i.fa-gauge-high::before {
            content: "\f625";
        }
        i.fa-circle-question:before {
            content: "\f059";
        }
        i.fa-tag:before {
            content: "\f02b";
        }
        i.fa-diagram-project::before {
            content: "\f542";
        }
        i.fa-command:before {
            content: "\f6cb";
        }
        i.fa-trophy::before {
            content: "\f091";
        }
        i.fa-building::before {
            content: "\f1ad";
        }
        i.fa-ranking-star::before {
            content: "\f561";
        }
        i.fa-bezier-curve::before {
            content: "\f55b";
        }
        i.fa-gauge-simple:before {
            content: "\f62a";
        }
        i.fa-sort:before {
            content: "\f0dc";
        }

/* roulang page: article */
:root {
    --bg-base: #031018;
    --bg-soft: #071623;
    --panel: rgba(13, 28, 43, 0.6);
    --panel-strong: rgba(15, 32, 49, 0.88);
    --stroke: rgba(157, 196, 222, 0.14);
    --primary: #3bc4ff;
    --primary-deep: #0a5c9e;
    --accent: #7388ff;
    --success: #21d6a0;
    --warning: #f8b64e;
    --text-title: #e8f0f7;
    --text-body: #a7bbca;
    --muted: #62778a;
    --glow: rgba(59,196,255,0.35);
    --radius: 16px;
    --radius-lg: 22px;
    --font-en: Tahoma, Arial, "Helvetica Neue", sans-serif;
    --transition: border-color .2s, box-shadow .2s, background .2s, color .2s, opacity .2s;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
    background: var(--bg-base);
    color: var(--text-body);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid rgba(59, 196, 255, .6); outline-offset: 2px; }
img { display: block; max-width: 100%; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 980px; }
@media screen and (max-width: 639px) {
    .container { padding: 0 16px; }
}

/* site header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid var(--stroke);
    background: rgba(3, 10, 18, 0.84);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}
.header-inner {
    height: 72px;
    display: flex;
    align-items: center;
    gap: 28px;
}
.logo-block {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-badge {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(59,196,255,.16), rgba(10,92,158,.3));
    border: 1px solid rgba(59,196,255,.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    box-shadow: 0 0 18px rgba(59,196,255,.15);
}
.logo-text .cn { display: block; font-weight: 700; font-size: 20px; color: var(--text-title); letter-spacing: .3px; line-height: 1.2; }
.logo-text .en { display: block; font-size: 10px; letter-spacing: .52px; color: var(--primary); opacity: .65; text-transform: uppercase; line-height: 1.4; }
.main-nav { display: flex; align-items: center; gap: 20px; margin-left: 18px; }
.main-nav a {
    display: inline-flex;
    align-items: center;
    color: #8fa5b6;
    font-size: 15px;
    font-weight: 500;
    gap: 5px;
    padding: 12px 0 10px;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
}
.main-nav a i { color: var(--primary); opacity: .55; transition: var(--transition); }
.main-nav a:hover { color: var(--primary); }
.main-nav a:hover i { opacity: 1; }
.main-nav a.active { color: var(--primary); border-bottom-color: var(--primary); }
.main-nav a.active i { opacity: 1; }
.header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}
.search-trigger {
    height: 36px;
    width: 190px;
    border-radius: 9px;
    border: 1px solid var(--stroke);
    background: rgba(255,255,255,.045);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 12px;
    color: var(--muted);
    cursor: pointer;
    font-size: 13px;
    transition: var(--transition);
}
.search-trigger i { opacity: .5; font-size: 13px; }
.search-trigger kbd {
    font-family: var(--font-en);
    font-size: 11px;
    background: rgba(255,255,255,.08);
    padding: 1px 5px;
    border-radius: 4px;
    margin-left: auto;
}
.search-trigger:hover { border-color: rgba(59,196,255,.3); background: rgba(59,196,255,.05); color:#d7e5f0; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 40px;
    padding: 0 18px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .2s, box-shadow .2s, background .2s, color .2s, border-color .2s;
    white-space: nowrap;
    font-family: inherit;
}
.btn-primary {
    background: linear-gradient(120deg, #3ac9ff, #0d8de0);
    color: #eef8ff;
    box-shadow: 0 8px 22px rgba(59,196,255,.28);
}
.btn-primary:hover { transform: translateY(-1px); filter: brightness(1.08); box-shadow: 0 12px 28px rgba(59,196,255,.35); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
    background: rgba(255,255,255,.05);
    border-color: var(--stroke);
    color: #b9d1df;
}
.btn-secondary:hover { border-color: rgba(59,196,255,.4); background: rgba(255,255,255,.09); color: #e8f0f7; }
.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--primary);
    padding: 0 4px;
}
.btn-ghost i { transition: transform .2s; }
.btn-ghost:hover i { transform: translateX(3px); }
.header-mobile { display: none; }
.menu-toggle {
    border: 1px solid var(--stroke);
    background: rgba(255,255,255,.05);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    color: var(--text-title);
    cursor: pointer;
}

@media screen and (max-width: 1023px) {
    .header-right .search-trigger { width: 150px; }
    .header-right .btn-ghost { display: none; }
    .main-nav { gap: 14px; margin-left: 6px; }
}
@media screen and (max-width: 799px) {
    .header-cta-wrap { display: none; }
    .main-nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(3,10,18,.97);
        backdrop-filter: blur(18px);
        border-bottom: 1px solid var(--stroke);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 10px 22px 18px;
        display: none;
        box-shadow: 0 24px 60px rgba(0,0,0,.45);
        z-index: 60;
    }
    .main-nav.show { display: flex; }
    .main-nav a {
        justify-content: flex-start;
        padding: 14px 4px;
        border-bottom: 1px solid rgba(255,255,255,.06);
        border-left: 0;
    }
    .main-nav a:last-child { border-bottom: 0; }
    .header-mobile { display: inline-flex; margin-left: auto; }
    .header-inner { flex-wrap: wrap; gap: 12px; }
    .header-right { width: 100%; margin-left: 0; margin-top: 0; }
}
@media screen and (max-width: 639px) {
    .search-trigger span { display: none; }
    .search-trigger kbd { display: none; }
    .search-trigger { width: 40px; padding: 0; justify-content: center; }
}

/* article hero */
.article-hero {
    position: relative;
    background:
        radial-gradient(ellipse at 80% 0%, rgba(59,196,255,.12), transparent 42%),
        radial-gradient(ellipse at 10% 20%, rgba(115,136,255,.06), transparent 40%),
        var(--bg-base);
    border-bottom: 1px solid rgba(157,196,222,.08);
    padding: 56px 0 40px;
    overflow: hidden;
}
.article-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
    background-size: 42px 42px;
    opacity: .3;
    pointer-events: none;
    -webkit-mask-image: linear-gradient(to bottom, black, transparent 88%);
    mask-image: linear-gradient(to bottom, black, transparent 88%);
}
.article-hero .container { position: relative; z-index: 2; }
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--muted);
    margin-bottom: 26px;
    flex-wrap: wrap;
}
.breadcrumb a { color: var(--muted); transition: var(--transition); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .crumb-sep { color: rgba(157,196,222,.4); font-size: 12px; }
.breadcrumb .current { color: #bdd3e2; }
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.cat-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--primary);
    background: rgba(59,196,255,.1);
    border: 1px solid rgba(59,196,255,.2);
    letter-spacing: .3px;
}
.article-h1 {
    font-size: clamp(28px, 4.2vw, 48px);
    line-height: 1.25;
    color: var(--text-title);
    font-weight: 700;
    letter-spacing: -.4px;
    max-width: 900px;
    margin-bottom: 14px;
}
.article-summary {
    max-width: 860px;
    font-size: 16px;
    color: var(--text-body);
    margin-top: 8px;
    line-height: 1.85;
}
.article-meta-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 18px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid rgba(157,196,222,.1);
}
.meta-item {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 14px;
    color: var(--muted);
}
.meta-item i { font-size: 13px; color: var(--primary); opacity: .75; }
.meta-item .meta-user {
    width: 24px; height: 24px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-deep), var(--primary));
    display: inline-block;
}
@media screen and (max-width: 799px) {
    .article-hero { padding: 36px 0 28px; }
    .article-h1 { font-size: 30px; }
}

/* cover image */
.article-feature {
    background: var(--bg-base);
    padding: 48px 0 20px;
}
.cover-wrap {
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--stroke);
    box-shadow: 0 18px 50px rgba(0,0,0,.25);
    max-height: 520px;
    background: #081420;
}
.cover-wrap img {
    width: 100%;
    height: 100%;
    max-height: 520px;
    object-fit: cover;
    aspect-ratio: 16 / 7;
    background: rgba(10,36,53,.5);
}
@media screen and (max-width: 639px) {
    .cover-wrap img { aspect-ratio: 16 / 9; }
}

/* article content */
.article-content-section {
    background: var(--bg-base);
    padding: 34px 0 60px;
}
.content-layout {
    max-width: 760px;
    margin: 0 auto;
    background: var(--panel-strong);
    border: 1px solid var(--stroke);
    border-radius: var(--radius-lg);
    padding: 48px 50px;
    box-shadow: 0 10px 34px rgba(0,0,0,.18);
}
@media screen and (max-width: 799px) {
    .content-layout { padding: 28px 20px; border-radius: var(--radius); }
}

.cms-article-body {
    color: #b6c8d4;
    font-size: 16px;
    line-height: 1.95;
    word-break: break-word;
}
.cms-article-body > *:first-child { margin-top: 0; }
.cms-article-body > *:last-child { margin-bottom: 0; }
.cms-article-body h1,
.cms-article-body h2,
.cms-article-body h3,
.cms-article-body h4 {
    color: var(--text-title);
    font-weight: 700;
    line-height: 1.4;
    margin: 2rem 0 .85rem;
}
.cms-article-body h2 { font-size: 28px; }
.cms-article-body h3 { font-size: 22px; }
.cms-article-body h4 { font-size: 18px; }
.cms-article-body p { margin-bottom: 1.65rem; }
.cms-article-body a { color: var(--primary); border-bottom: 1px solid rgba(59,196,255,.3); transition: var(--transition); }
.cms-article-body a:hover { color: #7dd8ff; border-bottom-color: #7dd8ff; }
.cms-article-body ul,
.cms-article-body ol {
    margin: 0 0 1.6rem 1.25rem;
    padding: 0;
}
.cms-article-body ul { list-style: none; }
.cms-article-body ul li { position: relative; padding-left: 8px; margin-bottom: .55rem; }
.cms-article-body ul li::before {
    content: "";
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 8px rgba(59,196,255,.5);
    position: absolute;
    left: -16px; top: .72em;
}
.cms-article-body ol li { margin-bottom: .5rem; padding-left: 6px; }
.cms-article-body blockquote {
    border-left: 3px solid var(--primary);
    background: rgba(59,196,255,.06);
    border-radius: 0 12px 12px 0;
    padding: 16px 20px;
    margin: 2rem 0;
    color: #b8cfe0;
}
.cms-article-body blockquote p { margin-bottom: .4rem; }
.cms-article-body code {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    background: rgba(59,196,255,.1);
    color: #89e1ff;
    border-radius: 6px;
    padding: 2px 7px;
    font-size: .88em;
    word-break: break-word;
}
.cms-article-body pre {
    background: #030c14;
    border: 1px solid rgba(115,136,255,.15);
    border-radius: 14px;
    padding: 18px 20px;
    overflow-x: auto;
    margin: 1.8rem 0;
    line-height: 1.7;
}
.cms-article-body pre code {
    background: transparent;
    padding: 0;
    font-size: .92em;
    color: #b9e9ff;
}
.cms-article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.8rem 0;
    background: rgba(10,26,42,.5);
    border: 1px solid var(--stroke);
    border-radius: 12px;
    overflow: hidden;
    font-size: 15px;
}
.cms-article-body table th {
    background: rgba(59,196,255,.08);
    color: #dcebf7;
    font-weight: 600;
    text-align: left;
    padding: 13px 16px;
}
.cms-article-body table td {
    border-top: 1px solid rgba(157,196,222,.1);
    padding: 12px 16px;
}
.cms-article-body img {
    border-radius: 14px;
    margin: 1.8rem 0;
    border: 1px solid var(--stroke);
}
.cms-article-body hr {
    opacity: .2;
    border: none;
    border-top: 1px solid var(--stroke);
    margin: 2.4rem 0;
}
.cms-article-body .cms-cta-box,
.cms-article-body .cta-qrcode {
    background: radial-gradient(circle at 20% 0%, rgba(59,196,255,.12), transparent 50%), rgba(13,28,43,.6);
    border: 1px solid rgba(59,196,255,.28);
    border-radius: 16px;
    padding: 22px 24px;
    margin: 2rem 0;
    color: #bdd3e4;
}
.cms-article-body .cms-cta-box h4 { margin-top: 0; }
.cms-article-body .cms-cta-box a { color: var(--primary); }
.cms-article-body .cms-cover-quote {
    font-size: 18px;
    background: linear-gradient(130deg, rgba(13,28,43,.8), rgba(15,32,49,.7));
    border-radius: 16px;
    padding: 28px 30px;
    border-left: 3px solid var(--primary);
    color: #d3e1ec;
    margin: 2rem 0;
}
.empty-state {
    text-align: center;
    padding: 70px 20px;
    color: var(--muted);
}
.empty-state i { font-size: 40px; margin-bottom: 16px; opacity: .4; }
.empty-state p { font-size: 17px; margin-bottom: 18px; color: #b6c8d4; }
.empty-state a { color: var(--primary); font-weight: 600; }
@media screen and (max-width: 639px) {
    .cms-article-body { font-size: 15px; }
    .cms-article-body h2 { font-size: 22px; }
    .cms-article-body blockquote, .cms-article-body pre { padding: 14px 14px; }
}

/* bottom actions */
.article-bottom-actions {
    background: var(--bg-base);
    padding-bottom: 46px;
}
.actions-card {
    max-width: 760px;
    margin: 0 auto;
    background: transparent;
    border-top: 1px solid var(--stroke);
    padding-top: 28px;
    margin-top: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.actions-card .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.mini-tag {
    font-size: 13px;
    padding: 5px 12px;
    border-radius: 100px;
    color: #8fa5b6;
    background: rgba(255,255,255,.04);
    border: 1px solid var(--stroke);
    transition: var(--transition);
}
.mini-tag:hover { color: var(--primary); border-color: rgba(59,196,255,.3); }
.return-btn { color: var(--primary); font-size: 14px; }
.return-btn i { margin-right: 6px; transition: transform .2s; }
.return-btn:hover i { transform: translateX(-3px); }
.article-pn {
    background: var(--bg-base);
    padding-bottom: 40px;
}
.pn-grid {
    max-width: 960px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
@media screen and (max-width: 639px) {
    .pn-grid { grid-template-columns: 1fr; gap: 12px; }
}
.pn-card {
    background: var(--panel);
    border: 1px solid var(--stroke);
    border-radius: 14px;
    padding: 20px 24px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.pn-card:hover { border-color: rgba(59,196,255,.3); box-shadow: 0 8px 26px rgba(0,0,0,.2); }
.pn-card .pn-label { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 8px; }
.pn-card.next { text-align: right; }
.pn-card.next .pn-label { justify-content: flex-end; }
.pn-card .pn-title { font-size: 17px; font-weight: 600; color: var(--text-title); line-height: 1.5; }
.pn-card i { color: var(--primary); opacity: .7; }
.pn-card.next i { order: 2; }

/* related section */
.related-section {
    background: var(--bg-soft);
    border-top: 1px solid rgba(157,196,222,.08);
    padding: 70px 0;
}
.related-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}
.small-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: .2px;
    text-transform: uppercase;
    margin-bottom: 12px;
}
.small-tag::before {
    content: "";
    width: 22px;
    height: 1px;
    background: var(--primary);
}
.section-title {
    font-size: clamp(24px, 3vw, 34px);
    line-height: 1.3;
    color: var(--text-title);
    font-weight: 700;
    max-width: 680px;
}
.section-title .hl { color: var(--primary); }
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
@media screen and (max-width: 1023px) {
    .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media screen and (max-width: 639px) {
    .related-grid { grid-template-columns: 1fr; gap: 16px; }
}
.article-card {
    background: var(--panel);
    border: 1px solid var(--stroke);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}
.article-card:hover {
    border-color: rgba(59,196,255,.3);
    box-shadow: 0 18px 40px rgba(0,0,0,.25);
}
.article-card .thumb {
    background: #08111b;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-bottom: 1px solid rgba(157,196,222,.08);
}
.article-card .thumb img { width: 100%; height: 100%; object-fit: cover; opacity: .95; transform: scale(1); transition: transform .3s; }
.article-card:hover .thumb img { transform: scale(1.03); }
.article-card .card-content { padding: 20px 20px 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.article-card .card-cat { font-size: 12px; color: var(--primary); }
.article-card h3 { font-size: 18px; color: var(--text-title); font-weight: 600; line-height: 1.5; }
.article-card h3 a { transition: var(--transition); }
.article-card h3 a:hover { color: var(--primary); }
.article-card p { font-size: 14px; color: #96aab8; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-card .card-foot {
    margin-top: auto;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--muted);
}
.article-card .card-foot i { font-size: 12px; }
@media screen and (max-width: 799px) {
    .related-section { padding: 48px 0; }
}

/* CTA */
.cta-section {
    background: var(--bg-base);
    padding: 60px 0 86px;
}
.cta-inner {
    max-width: 960px;
    margin: 0 auto;
    border-radius: 28px;
    overflow: hidden;
    background:
        radial-gradient(ellipse at -10% 10%, rgba(59,196,255,.14), transparent 48%),
        radial-gradient(ellipse at 120% 30%, rgba(115,136,255,.1), transparent 55%),
        linear-gradient(115deg, rgba(10,30,48,.9), rgba(6,18,31,.94));
    border: 1px solid rgba(59,196,255,.2);
    padding: 44px 44px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 36px;
    flex-wrap: wrap;
}
.cta-inner h2 { font-size: clamp(20px, 2.4vw, 28px); color: var(--text-title); font-weight: 700; margin-bottom: 8px; }
.cta-inner p { color: #9cb2c0; max-width: 480px; font-size: 15px; }
.cta-btns { display: flex; gap: 12px; flex-wrap: wrap; }
@media screen and (max-width: 639px) {
    .cta-section { padding-bottom: 60px; }
    .cta-inner { padding: 30px 22px; }
}

/* site footer */
.site-footer {
    background: #010910;
    border-top: 1px solid rgba(157,196,222,.08);
    color: #8095a6;
}
.site-footer .container { padding-top: 52px; padding-bottom: 30px; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.6fr;
    gap: 40px;
}
.footer-logo-txt {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}
.footer-logo-txt .cn-name { color: #e8f0f7; font-size: 22px; font-weight: 700; }
.foot-slogan {
    font-size: 15px;
    line-height: 1.85;
    max-width: 360px;
    margin-bottom: 18px;
    color: #6f8599;
}
.footer-col-title {
    font-size: 14px;
    font-weight: 600;
    color: #c8d9e6;
    margin-bottom: 16px;
    letter-spacing: .3px;
}
.footer-col-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 14px;
}
.footer-col-list a { color: #6f8599; transition: var(--transition); }
.footer-col-list a:hover { color: var(--primary); }
.footer-subscribe .subscribe-desc { font-size: 14px; color: #6f8599; margin-bottom: 12px; }
.footer-subscribe input {
    background: rgba(255,255,255,.05);
    border: 1px solid var(--stroke);
    color: #d6e5ef;
    border-radius: 9px;
    padding: 10px 14px;
    width: 100%;
    font-size: 14px;
    height: 42px;
}
.footer-subscribe input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59,196,255,.2);
    outline: none;
}
.footer-subscribe .btn { height: 42px; }
.footer-bottom {
    border-top: 1px solid rgba(157,196,222,.08);
    margin-top: 48px;
    padding-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 13px;
}
.copy a { color: #8095a6; }
.copy a:hover { color: var(--primary); }
.status-line { display: flex; align-items: center; gap: 10px; color: #748b9c; }
.footer-status-dot { display: flex; align-items: center; gap: 6px; }
.footer-status-dot .dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--success);
    display: inline-block;
    box-shadow: 0 0 10px rgba(33,214,160,.5);
}
@media screen and (max-width: 1023px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media screen and (max-width: 639px) {
    .site-footer .container { padding-top: 40px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* roulang page: category2 */
:root {
            --bg-base: #031018;
            --bg-soft: #071623;
            --panel: rgba(13, 28, 43, 0.6);
            --panel-strong: rgba(15, 32, 49, 0.86);
            --stroke: rgba(157, 196, 222, 0.14);
            --primary: #3bc4ff;
            --primary-deep: #0a5c9e;
            --accent: #7388ff;
            --success: #21d6a0;
            --warning: #f8b64e;
            --text-title: #e8f0f7;
            --text-body: #a7bbca;
            --muted: #62778a;
            --glow: rgba(59, 196, 255, 0.32);
            --radius: 16px;
            --radius-lg: 22px;
            --shadow-card: 0 18px 38px rgba(0, 0, 0, 0.26);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg-base);
            color: var(--text-body);
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            overflow-x: hidden;
        }

        body::before {
            content: "";
            pointer-events: none;
            position: fixed;
            inset: 0;
            z-index: 0;
            background:
                radial-gradient(640px 360px at 82% -4%, rgba(59, 196, 255, 0.12), transparent 60%),
                radial-gradient(900px 500px at -8% 24%, rgba(115, 136, 255, 0.08), transparent 55%);
        }

        body > header,
        body > main,
        body > footer {
            position: relative;
            z-index: 1;
        }

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

        img {
            max-width: 100%;
            display: block;
            border: 0;
        }

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

        button {
            cursor: pointer;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 5px 12px;
            border: 1px solid rgba(59, 196, 255, 0.24);
            background: rgba(59, 196, 255, 0.06);
            border-radius: 999px;
            color: #8fd8ff;
            font-size: 13px;
            letter-spacing: 0.04em;
            font-weight: 500;
        }

        .section-eyebrow i {
            font-size: 12px;
            color: var(--primary);
        }

        .section-title {
            margin: 18px 0 12px;
            font-size: 32px;
            line-height: 1.35;
            color: var(--text-title);
            font-weight: 700;
            letter-spacing: -0.01em;
        }

        .section-sub {
            font-size: 16px;
            color: var(--text-body);
            max-width: 760px;
            margin-bottom: 0;
        }

        .section-head {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 24px;
            margin-bottom: 34px;
            flex-wrap: wrap;
        }

        .section-head .more-link {
            color: #8fd8ff;
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            transition: color 0.2s;
        }

        .section-head .more-link i {
            margin-left: 4px;
            transition: transform 0.2s;
        }

        .section-head .more-link:hover {
            color: var(--primary);
        }

        .section-head .more-link:hover i {
            transform: translateX(4px);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 11px;
            border: 1px solid transparent;
            height: 46px;
            padding: 0 22px;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, #3ac9ff, #0d8de0);
            box-shadow: 0 0 20px rgba(59, 196, 255, 0.16);
            transition: box-shadow .2s, border-color .2s, background .2s, transform .2s, color .2s;
            white-space: nowrap;
        }

        .btn:hover {
            box-shadow: 0 0 30px rgba(59, 196, 255, 0.36);
            transform: translateY(-1px);
            background: linear-gradient(135deg, #66d7ff, #169dee);
        }

        .btn:active {
            transform: translateY(0);
        }

        .btn-ghost {
            background: rgba(5, 18, 30, 0.68);
            border-color: rgba(157, 196, 222, 0.3);
            color: #b8d2e6;
            box-shadow: none;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(59, 196, 255, 0.38);
            color: #fff;
            box-shadow: none;
            transform: translateY(-1px);
        }

        .btn-sm {
            height: 38px;
            padding: 0 16px;
            font-size: 14px;
            border-radius: 9px;
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(59, 196, 255, 0.55);
            color: #9edadf;
        }

        .btn-outline:hover {
            background: rgba(59, 196, 255, 0.08);
            color: #fff;
            border-color: var(--primary);
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #98d7ff;
            font-size: 14px;
            transition: color .2s;
        }

        .text-link i {
            transition: transform .2s;
        }

        .text-link:hover {
            color: #e5f6ff;
        }

        .text-link:hover i {
            transform: translateX(4px);
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(4, 12, 22, 0.84);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(157, 196, 222, 0.12);
            z-index: 99;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 26px;
        }

        .brand-lockup {
            display: flex;
            align-items: center;
            gap: 12px;
            min-width: 0;
        }

        .brand-mark {
            width: 38px;
            height: 38px;
            flex: 0 0 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            color: var(--primary);
            background: linear-gradient(145deg, rgba(59, 196, 255, 0.2), rgba(255, 255, 255, 0.02));
            border: 1px solid rgba(59, 196, 255, 0.5);
            box-shadow: 0 0 16px rgba(59, 196, 255, 0.12);
        }

        .brand-cn {
            font-size: 20px;
            line-height: 1;
            font-weight: 700;
            color: #eef5fb;
            letter-spacing: 0.01em;
        }

        .brand-sub {
            max-width: 86px;
            color: var(--muted);
            font-size: 10px;
            line-height: 13px;
            font-family: Tahoma, Arial, sans-serif;
            border-left: 1px solid rgba(157, 196, 222, 0.2);
            padding-left: 10px;
            letter-spacing: 0.03em;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 30px;
            margin-left: auto;
        }

        .main-nav a {
            position: relative;
            font-size: 15px;
            line-height: 1.2;
            color: #8da2b3;
            font-weight: 500;
            padding: 6px 0;
            transition: color .2s;
        }

        .main-nav a i {
            margin-right: 4px;
            font-size: 11px;
            color: #5b7892;
            transition: color .2s;
        }

        .main-nav a::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            box-shadow: 0 0 10px var(--glow);
            opacity: 0;
            transform: scaleX(0.3);
            transition: opacity .2s, transform .2s;
        }

        .main-nav a:hover {
            color: #d9eefc;
        }

        .main-nav a:hover i {
            color: var(--primary);
        }

        .main-nav a.active {
            color: #fff;
        }

        .main-nav a.active::after {
            opacity: 1;
            transform: scaleX(1);
        }

        .main-nav a.active i {
            color: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
        }

        .cmd-search {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(10, 23, 36, 0.74);
            border: 1px solid var(--stroke);
            border-radius: 10px;
            color: #7b93a8;
            height: 38px;
            padding: 0 12px;
            width: 196px;
            font-size: 13px;
            transition: border-color .2s, box-shadow .2s, background .2s;
        }

        .cmd-search i {
            color: #5f8ea8;
        }

        .cmd-search span {
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .cmd-search kbd {
            font-size: 11px;
            font-family: Tahoma, Arial, sans-serif;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(157, 196, 222, 0.2);
            border-radius: 5px;
            padding: 0 4px;
            margin-left: auto;
            color: #58718a;
        }

        .cmd-search:hover,
        .cmd-search:focus-within {
            border-color: rgba(59, 196, 255, 0.55);
            box-shadow: 0 0 0 3px rgba(59, 196, 255, 0.08);
        }

        .quick-link {
            color: #8fc0da;
            font-size: 14px;
            font-weight: 500;
            transition: color .2s;
            white-space: nowrap;
        }

        .quick-link:hover {
            color: #fff;
        }

        .nav-cta {
            height: 38px;
            font-size: 14px;
            padding: 0 18px;
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            gap: 4px;
            flex-direction: column;
            background: transparent;
            border: 1px solid var(--stroke);
            border-radius: 10px;
            padding: 0 10px;
        }

        .mobile-toggle span {
            display: block;
            height: 2px;
            width: 18px;
            background: #d4e7f5;
            border-radius: 2px;
            transition: transform .2s, opacity .2s;
        }

        .site-header.mobile-open .mobile-toggle span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }

        .site-header.mobile-open .mobile-toggle span:nth-child(2) {
            opacity: 0;
        }

        .site-header.mobile-open .mobile-toggle span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s, background .2s;
            background: rgba(4, 12, 22, 0.96);
        }

        .site-header.mobile-open .mobile-menu {
            display: block;
            max-height: 420px;
            border-top: 1px solid var(--stroke);
        }

        .mobile-menu a {
            display: block;
            padding: 15px 26px;
            color: #a9bfd1;
            border-bottom: 1px solid rgba(157, 196, 222, 0.08);
            font-size: 15px;
        }

        .mobile-menu a:last-child {
            border-bottom: 0;
        }

        .mobile-menu a.active {
            color: #fff;
            background: rgba(59, 196, 255, 0.06);
        }

        .category2-main {
            padding-top: 74px;
        }

        .page-top {
            padding: 78px 0 30px;
            background:
                radial-gradient(620px 240px at 15% 0%, rgba(59, 196, 255, 0.06), transparent 70%);
        }

        .page-top-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }

        .page-top-left {
            max-width: 820px;
            flex: 1 1 620px;
        }

        .page-top-right {
            flex: 1 1 260px;
            display: flex;
            justify-content: flex-end;
        }

        .page-h1 {
            font-size: 42px;
            line-height: 1.35;
            margin: 22px 0 16px;
            font-weight: 700;
            color: var(--text-title);
            letter-spacing: -0.015em;
            max-width: 780px;
        }

        .page-h1 .primary-word {
            color: var(--primary);
        }

        .page-lead {
            font-size: 17px;
            color: #a6bbc9;
            line-height: 1.9;
            max-width: 720px;
            margin: 0;
        }

        .category-switch {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 5px;
            background: rgba(8, 21, 33, 0.7);
            border: 1px solid rgba(157, 196, 222, 0.16);
            border-radius: 14px;
            min-width: 264px;
        }

        .category-switch a {
            flex: 1;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 5px;
            color: #7891a5;
            font-size: 14px;
            font-weight: 500;
            padding: 10px 10px;
            border-radius: 10px;
            transition: background .2s, color .2s, box-shadow .2s;
            white-space: nowrap;
        }

        .category-switch a i {
            font-size: 12px;
        }

        .category-switch a:hover {
            color: #c5ddeb;
        }

        .category-switch a.active {
            background: linear-gradient(135deg, rgba(58, 201, 255, 0.22), rgba(13, 141, 224, 0.18));
            color: #fff;
            box-shadow: inset 0 0 0 1px rgba(59, 196, 255, 0.32), 0 6px 18px rgba(0, 0, 0, 0.2);
        }

        .library-section {
            padding: 40px 0 100px;
            background: transparent;
        }

        .library-stack {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .lib-row {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--panel);
            border: 1px solid var(--stroke);
            border-radius: var(--radius);
            padding: 22px 24px;
            transition: border-color .2s, box-shadow .2s, background .2s;
        }

        .lib-row:hover {
            background: var(--panel-strong);
            border-color: rgba(59, 196, 255, 0.35);
            box-shadow: 0 0 0 1px rgba(59, 196, 255, 0.08), var(--shadow-card);
        }

        .lib-icon {
            flex: 0 0 50px;
            width: 50px;
            height: 50px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            color: #c9e2ff;
            background: rgba(59, 196, 255, 0.11);
            border: 1px solid rgba(59, 196, 255, 0.22);
            font-size: 21px;
        }

        .lib-main {
            flex: 1 1 auto;
            min-width: 220px;
        }

        .lib-title {
            margin: 0 0 4px;
            color: #e9f2fa;
            font-size: 18px;
            font-weight: 600;
            line-height: 1.5;
        }

        .lib-desc {
            margin: 0;
            font-size: 14.5px;
            line-height: 1.7;
            color: #99b1c1;
            max-width: 720px;
        }

        .lib-tags {
            display: flex;
            gap: 8px;
            margin-top: 10px;
            flex-wrap: wrap;
        }

        .lib-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            border: 1px solid rgba(157, 196, 222, 0.15);
            border-radius: 999px;
            padding: 3px 9px;
            background: rgba(255, 255, 255, 0.02);
            color: #7e9bb1;
            font-size: 12px;
            line-height: 1.5;
        }

        .lib-action {
            flex: 0 0 auto;
            display: flex;
            align-items: center;
            gap: 6px;
            color: #8fd3f8;
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            padding: 8px;
            border-radius: 9px;
            transition: color .2s, background .2s;
        }

        .lib-action i {
            transition: transform .2s;
        }

        .lib-action:hover {
            color: #fff;
            background: rgba(59, 196, 255, 0.1);
        }

        .lib-action:hover i {
            transform: translateX(3px);
        }

        .flow-section {
            padding: 30px 0 100px;
        }

        .flow-panel {
            background: rgba(7, 22, 35, 0.72);
            border: 1px solid rgba(157, 196, 222, 0.14);
            border-radius: 26px;
            padding: 34px;
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.22);
        }

        .flow-media-row {
            display: flex;
            gap: 30px;
            align-items: stretch;
            flex-wrap: wrap;
        }

        .flow-image-wrap {
            flex: 1 1 300px;
            border-radius: 20px;
            overflow: hidden;
            position: relative;
            border: 1px solid rgba(157, 196, 222, 0.12);
            min-height: 300px;
            max-height: 420px;
            background: #06121e;
        }

        .flow-image-wrap img {
            width: 100%;
            height: 100%;
            min-height: 300px;
            max-height: 420px;
            object-fit: cover;
            opacity: 0.92;
        }

        .flow-image-wrap::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(3, 16, 24, 0) 30%, rgba(3, 16, 24, 0.62) 100%);
        }

        .flow-desc {
            flex: 1 1 440px;
            min-height: 300px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .flow-desc h3 {
            font-size: 27px;
            line-height: 1.5;
            color: var(--text-title);
            margin: 14px 0 16px;
            max-width: 620px;
            font-weight: 700;
        }

        .flow-desc p {
            color: #a4b9c8;
            line-height: 1.9;
            margin: 0 0 22px;
        }

        .insight-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 16px;
            margin-top: 20px;
        }

        .insight-card {
            background: rgba(12, 30, 47, 0.7);
            border: 1px solid var(--stroke);
            border-radius: 16px;
            padding: 20px 20px 18px;
            transition: border-color .2s, box-shadow .2s;
        }

        .insight-card:hover {
            border-color: rgba(59, 196, 255, 0.35);
            box-shadow: 0 0 0 1px rgba(59, 196, 255, 0.1), 0 16px 32px rgba(0, 0, 0, 0.22);
        }

        .insight-card .ic {
            color: var(--primary);
            margin-bottom: 10px;
            font-size: 19px;
        }

        .insight-card .insight-title {
            display: block;
            margin-bottom: 6px;
            font-weight: 600;
            color: #e2eff8;
            font-size: 16px;
        }

        .insight-card p {
            margin: 0;
            font-size: 14px;
            line-height: 1.75;
            color: #92a9b8;
        }

        .cadence-section {
            padding: 76px 0 104px;
            background-image:
                linear-gradient(100deg, rgba(3, 16, 24, 0.96), rgba(4, 18, 29, 0.82)),
                url('/assets/images/backpic/back-2.png');
            background-position: center;
            background-size: cover;
        }

        .cadence-section .section-title {
            max-width: 680px;
        }

        .cadence-section .section-sub {
            max-width: 680px;
        }

        .cadence-list {
            margin-top: 36px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .cadence-row {
            display: grid;
            grid-template-columns: 180px 1fr 240px;
            align-items: center;
            gap: 18px;
            background: rgba(9, 24, 36, 0.74);
            border: 1px solid rgba(157, 196, 222, 0.16);
            border-radius: 18px;
            padding: 22px 26px;
            backdrop-filter: blur(6px);
            transition: border-color .2s, box-shadow .2s;
        }

        .cadence-row:hover {
            border-color: rgba(59, 196, 255, 0.32);
            box-shadow: 0 0 0 1px rgba(59, 196, 255, 0.08), var(--shadow-card);
        }

        .cadence-stage {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .stage-num {
            flex: 0 0 34px;
            width: 34px;
            height: 34px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 700;
            color: #bfe5ff;
            font-family: Tahoma, Arial, sans-serif;
            background: rgba(59, 196, 255, 0.14);
            border: 1px solid rgba(59, 196, 255, 0.3);
        }

        .cadence-stage b {
            font-size: 17px;
            color: #eaf3fb;
            font-weight: 600;
        }

        .cadence-desc {
            color: #98b3c5;
            font-size: 15px;
            line-height: 1.85;
            margin: 0;
        }

        .cadence-metrics {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .cadence-metric {
            color: #c9e6ff;
            font-size: 13px;
            padding: 5px 10px;
            background: rgba(59, 196, 255, 0.08);
            border: 1px solid rgba(59, 196, 255, 0.18);
            border-radius: 999px;
            white-space: nowrap;
        }

        .faq-section {
            padding: 96px 0 24px;
        }

        .faq-wrap {
            max-width: 880px;
            margin: 0 auto;
        }

        .faq-list {
            margin: 0 !important;
            padding: 0;
            list-style: none;
        }

        .faq-item {
            background: rgba(13, 28, 43, 0.58);
            border: 1px solid var(--stroke);
            border-radius: 16px !important;
            margin-bottom: 12px !important;
            padding: 0 22px;
            transition: border-color .2s, box-shadow .2s;
        }

        .faq-item:hover {
            border-color: rgba(157, 196, 222, 0.25);
        }

        .faq-item.is-active {
            border-color: rgba(59, 196, 255, 0.42);
            box-shadow: 0 0 0 1px rgba(59, 196, 255, 0.08);
        }

        .faq-question-title {
            display: flex !important;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 14px;
            align-items: center;
            width: 100%;
            color: #e4eff8 !important;
            font-size: 16px;
            font-weight: 600;
            padding: 19px 0 !important;
            transition: color .2s;
        }

        .faq-question-title .faq-q {
            color: #d5edff;
            font-size: 15px;
        }

        .faq-question-title .faq-icon {
            margin-left: auto;
            color: #7ea6c2;
            width: 28px;
            height: 28px;
            flex: 0 0 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(59, 196, 255, 0.1);
            border: 1px solid rgba(157, 196, 222, 0.18);
            font-size: 12px;
            transition: background .2s, color .2s, transform .2s, border-color .2s;
        }

        .faq-item.is-active .faq-icon {
            background: rgba(59, 196, 255, 0.16);
            border-color: rgba(59, 196, 255, 0.4);
            color: var(--primary);
            transform: rotate(45deg);
        }

        .faq-answer {
            color: #9db3c2;
            font-size: 15px;
            line-height: 1.9;
            padding-bottom: 20px;
        }

        .faq-answer p {
            margin: 0;
        }

        .cta-section {
            padding: 96px 0 30px;
        }

        .cta-panel {
            background:
                radial-gradient(620px 300px at 14% 0%, rgba(59, 196, 255, 0.14), transparent 65%),
                radial-gradient(480px 260px at 95% 100%, rgba(115, 136, 255, 0.1), transparent 60%),
                rgba(7, 22, 35, 0.84);
            border: 1px solid rgba(115, 196, 240, 0.22);
            border-radius: 28px;
            padding: 58px 60px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 42px;
            flex-wrap: wrap;
            box-shadow: 0 32px 70px rgba(0, 0, 0, 0.26);
        }

        .cta-left {
            max-width: 640px;
        }

        .cta-left h2 {
            margin: 14px 0 12px;
            font-size: 30px;
            line-height: 1.5;
            color: #f0f7fd;
            font-weight: 700;
        }

        .cta-left p {
            color: #a7bdcc;
            font-size: 16px;
            line-height: 1.9;
            margin: 0 0 18px;
        }

        .cta-action {
            display: flex;
            gap: 14px;
            align-items: center;
            flex-wrap: wrap;
            margin-top: 12px;
        }

        .cta-back {
            color: #7f9bad;
            font-size: 13px;
        }

        .cta-back:hover {
            color: #bfe5ff;
        }

        .site-footer {
            background: rgba(2, 10, 17, 0.95);
            border-top: 1px solid rgba(157, 196, 222, 0.1);
            padding: 76px 0 28px;
            margin-top: 120px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 0.9fr 0.9fr 1.1fr;
            gap: 32px;
        }

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

        .logo-badge {
            width: 32px;
            height: 32px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 9px;
            background: rgba(59, 196, 255, 0.16);
            border: 1px solid rgba(59, 196, 255, 0.3);
            color: var(--primary);
        }

        .site-footer .foot-slogan {
            margin: 16px 0 0;
            color: #7d95a8;
            font-size: 15px;
            line-height: 1.8;
            max-width: 340px;
        }

        .footer-col-title {
            font-size: 15px;
            font-weight: 600;
            color: #c7ddee;
            margin: 12px 0 14px;
        }

        .footer-col-list {
            display: flex;
            flex-direction: column;
            gap: 9px;
        }

        .footer-col-list a {
            color: #7a91a3;
            font-size: 14px;
            transition: color .2s;
        }

        .footer-col-list a:hover {
            color: var(--primary);
        }

        .subscribe-desc {
            color: #7a91a3;
            font-size: 14px;
            margin: 0 0 14px;
        }

        .footer-subscribe input {
            flex: 1 1 120px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--stroke);
            border-radius: 9px;
            height: 38px;
            padding: 0 12px;
            color: #ddf2ff;
            min-width: 0;
            outline: none;
            transition: border-color .2s, box-shadow .2s;
        }

        .footer-subscribe input:focus {
            border-color: rgba(59, 196, 255, 0.5);
            box-shadow: 0 0 0 3px rgba(59, 196, 255, 0.08);
        }

        .footer-bottom {
            margin-top: 44px;
            padding-top: 22px;
            border-top: 1px solid rgba(157, 196, 222, 0.09);
            display: flex;
            justify-content: space-between;
            gap: 18px;
            flex-wrap: wrap;
            color: #60788c;
            font-size: 13px;
        }

        .footer-bottom a {
            color: #7a9cb4;
            transition: color .2s;
        }

        .footer-bottom a:hover {
            color: var(--primary);
        }

        .status-line {
            display: flex;
            align-items: center;
            gap: 6px;
            color: #6f899e;
        }

        .footer-status-dot {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-status-dot .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--success);
            box-shadow: 0 0 8px rgba(33, 214, 160, 0.7);
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        @media screen and (max-width: 1180px) {
            .container {
                padding-left: 22px;
                padding-right: 22px;
            }

            .main-nav {
                gap: 18px;
            }

            .main-nav a {
                font-size: 14px;
            }

            .cmd-search {
                width: 154px;
            }

            .quick-link {
                display: none;
            }
        }

        @media screen and (max-width: 980px) {
            .main-nav {
                display: none;
            }

            .mobile-toggle {
                display: inline-flex;
            }

            .nav-actions {
                margin-left: 0;
            }

            .library-row {
                flex-wrap: wrap;
            }

            .flow-media-row {
                flex-direction: column;
            }

            .flow-image-wrap img,
            .flow-image-wrap {
                min-height: 280px;
                max-height: 320px;
                width: 100%;
            }

            .cadence-row {
                grid-template-columns: 1fr;
                gap: 10px;
                align-items: flex-start;
            }

            .cadence-metrics {
                padding-top: 4px;
            }

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

            .cta-panel {
                padding: 42px 30px;
            }
        }

        @media screen and (max-width: 760px) {
            .page-top {
                padding: 64px 0 28px;
            }

            .page-top-grid {
                flex-direction: column;
                align-items: stretch;
                gap: 24px;
            }

            .page-top-right {
                justify-content: flex-start;
            }

            .page-h1 {
                font-size: 32px;
                line-height: 1.4;
            }

            .section-title {
                font-size: 26px;
                line-height: 1.45;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                margin-bottom: 26px;
            }

            .library-section {
                padding: 20px 0 72px;
            }

            .flow-section {
                padding: 10px 0 70px;
            }

            .flow-panel {
                padding: 22px 18px;
            }

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

            .cadence-section {
                padding: 70px 0 80px;
            }

            .faq-section {
                padding: 80px 0 24px;
            }

            .cta-section {
                padding: 72px 0 20px;
            }

            .cta-panel {
                padding: 30px 18px;
                flex-direction: column;
                align-items: stretch;
            }

            .cta-left h2 {
                font-size: 25px;
            }

            .site-footer {
                padding: 58px 0 22px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .footer-col-title {
                margin: 0 0 14px;
            }
        }

        @media screen and (max-width: 620px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .header-inner {
                height: 66px;
                gap: 12px;
            }

            .category2-main {
                padding-top: 66px;
            }

            .brand-cn {
                font-size: 18px;
            }

            .brand-sub {
                display: none;
            }

            .cmd-search {
                width: 42px;
                padding: 0 12px;
                justify-content: center;
            }

            .cmd-search span,
            .cmd-search kbd {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .mobile-toggle {
                width: 38px;
                height: 38px;
            }

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

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

            .category-switch {
                width: 100%;
                max-width: none;
            }

            .lib-row {
                flex-direction: column;
                align-items: flex-start;
                padding: 18px;
                gap: 14px;
            }

            .lib-action {
                padding: 6px 2px;
            }

            .cadence-row {
                padding: 18px;
            }

            .faq-item {
                padding: 0 16px;
            }

            .faq-question-title {
                font-size: 15px;
                padding: 16px 0 !important;
            }

            .faq-question-title .faq-q {
                font-size: 14px;
            }

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

            .footer-bottom {
                flex-direction: column;
            }
        }