/* roulang page: index */
:root {
        --primary: #1B6DFF;
        --primary-hover: #2E7EFF;
        --signal: #22D3EE;
        --amber: #F2A33C;
        --ink-deep: #080D1A;
        --ink-soft: #101827;
        --ink-card: #141E2E;
        --text-white: #F8FAFC;
        --text-muted: #B0B8C4;
        --text-subtle: #748094;
        --line-white: rgba(255, 255, 255, 0.09);
        --glass-bg: rgba(255, 255, 255, 0.045);
        --glass-border: rgba(255, 255, 255, 0.12);
        --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.28), 0 1px 2px rgba(0, 0, 0, 0.2);
        --shadow-btn: 0 0 0 1px rgba(27, 109, 255, 0.35), 0 10px 40px -6px rgba(27, 109, 255, 0.55);
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        background: #F4F6FA;
        color: #1E293B;
        line-height: 1.75;
        font-size: 16px;
        margin: 0;
        -webkit-font-smoothing: antialiased;
    }

    * {
        box-sizing: border-box;
    }

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

    a, button, input, textarea {
        outline: none;
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible,
    summary:focus-visible {
        box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.35);
        border-radius: 8px;
    }

    .container-xl {
        max-width: 1240px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 24px;
        padding-right: 24px;
    }

    .section-pad {
        padding-top: 96px;
        padding-bottom: 96px;
    }

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

    h1, h2, h3, h4 {
        line-height: 1.35;
        color: #0B1424;
    }

    .dark-section h1,
    .dark-section h2,
    .dark-section h3,
    .dark-section h4 {
        color: #F8FAFC;
    }

    .site-header {
        background: #060B14;
        border-bottom: 1px solid rgba(255, 255, 255, 0.07);
        position: relative;
        z-index: 50;
    }

    .utility-bar {
        background: rgba(255, 255, 255, 0.03);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        padding-top: 6px;
        padding-bottom: 6px;
        color: #8B95A7;
        font-size: 13px;
        letter-spacing: 0.02em;
    }

    .main-nav {
        display: flex;
        align-items: center;
        min-height: 72px;
        gap: 20px;
    }

    .logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        text-decoration: none;
        flex-shrink: 0;
    }

    .logo-mark {
        width: 38px;
        height: 38px;
        background: linear-gradient(135deg, #1B6DFF, #3E8BFF);
        border-radius: 10px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-weight: 800;
        font-size: 16px;
        letter-spacing: -0.5px;
        box-shadow: var(--shadow-btn);
    }

    .logo-text {
        color: #F8FAFC;
        font-size: 18px;
        font-weight: 700;
        white-space: nowrap;
        letter-spacing: 0.01em;
    }

    .logo-text small {
        display: block;
        font-size: 11px;
        color: #748094;
        font-weight: 400;
        margin-top: 2px;
        letter-spacing: 0.05em;
    }

    .nav-list {
        display: flex;
        align-items: center;
        gap: 6px;
        margin-left: auto;
    }

    .nav-link {
        position: relative;
        display: inline-flex;
        align-items: center;
        color: #C7CFDA;
        font-size: 15px;
        text-decoration: none;
        padding: 10px 14px;
        border-radius: 8px;
        transition: background 0.2s ease, color 0.2s ease;
    }

    .nav-link::after {
        content: "";
        position: absolute;
        left: 14px;
        right: 14px;
        bottom: 4px;
        height: 2px;
        border-radius: 4px;
        background: linear-gradient(90deg, var(--signal), transparent);
        transform: scaleX(0);
        transform-origin: left center;
        transition: transform 0.22s ease-out;
    }

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

    .nav-link:hover::after,
    .nav-link.active::after {
        transform: scaleX(1);
    }

    .nav-link.active {
        color: #fff;
        background: rgba(27, 109, 255, 0.1);
    }

    .mega-trigger {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        border-radius: 10px;
        border: 1px solid rgba(255, 255, 255, 0.16);
        background: rgba(255, 255, 255, 0.05);
        color: #D5DBE3;
        cursor: pointer;
        transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
    }

    .mega-trigger:hover {
        color: #fff;
        background: rgba(27, 109, 255, 0.25);
        border-color: rgba(34, 211, 238, 0.4);
        transform: rotate(-6deg);
    }

    .btn-primary, .btn-secondary, .btn-light {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        border-radius: 10px;
        font-size: 15px;
        line-height: 1;
        text-decoration: none;
        padding: 14px 24px;
        transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.1s ease;
        cursor: pointer;
        border: 0;
        font-weight: 600;
    }

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

    .btn-primary:hover {
        background: var(--primary-hover);
        box-shadow: 0 0 0 1px rgba(27, 109, 255, 0.45), 0 16px 45px -8px rgba(27, 109, 255, 0.75);
    }

    .btn-primary:active {
        transform: translateY(1px);
    }

    .btn-secondary {
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.26);
        color: #E4E8EE;
        box-shadow: none;
    }

    .btn-secondary:hover {
        background: rgba(27, 109, 255, 0.22);
        border-color: rgba(27, 109, 255, 0.45);
        color: #fff;
    }

    .btn-light {
        background: #1B6DFF;
        color: #fff;
        box-shadow: 0 8px 30px -10px rgba(27, 109, 255, 0.6);
    }

    .btn-light:hover {
        background: #2E7EFF;
    }

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

    .hero {
        position: relative;
        background: #080D1A;
        min-height: 720px;
        overflow: hidden;
    }

    .hero-bgimg {
        position: absolute;
        inset: 0;
        background-image: url("/assets/images/backpic/back-1.webp");
        background-position: center 20%;
        background-size: cover;
        opacity: 0.55;
    }

    .hero-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(105deg, rgba(6, 11, 20, 0.96), rgba(6, 11, 20, 0.78) 58%, rgba(16, 24, 39, 0.55));
    }

    .hero-grid-mask {
        position: absolute;
        inset: 0;
        background-image: linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
        background-size: 44px 44px;
        opacity: 0.3;
        mask-image: linear-gradient(135deg, transparent 5%, #000 80%);
        -webkit-mask-image: linear-gradient(135deg, transparent 5%, #000 80%);
    }

    .hero-content {
        position: relative;
        z-index: 3;
    }

    .hero-eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        color: #BFE6FF;
        font-size: 14px;
        border: 1px solid rgba(34, 211, 238, 0.28);
        background: rgba(27, 109, 255, 0.16);
        padding: 6px 12px;
        border-radius: 999px;
        letter-spacing: 0.05em;
    }

    .badge, .mini-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        border-radius: 999px;
        padding: 5px 10px;
        font-size: 13px;
        letter-spacing: 0.02em;
        line-height: 1.4;
    }

    .badge-blue {
        background: rgba(27, 109, 255, 0.14);
        border: 1px solid rgba(27, 109, 255, 0.32);
        color: #7DB2FF;
    }

    .badge-cyan {
        background: rgba(34, 211, 238, 0.1);
        border: 1px solid rgba(34, 211, 238, 0.26);
        color: #67E8F9;
    }

    .badge-amber {
        background: rgba(242, 163, 60, 0.14);
        border: 1px solid rgba(242, 163, 60, 0.35);
        color: #FFD29A;
    }

    .glass-card {
        background: linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.02));
        border: 1px solid rgba(255, 255, 255, 0.12);
        box-shadow: var(--shadow-card);
        backdrop-filter: blur(12px);
        border-radius: 20px;
    }

    .white-card {
        background: #fff;
        border: 1px solid #E8ECF2;
        border-radius: 18px;
        box-shadow: 0 8px 24px rgba(2, 12, 27, 0.05);
        transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .white-card:hover {
        transform: translateY(-3px);
        box-shadow: 0 16px 34px rgba(2, 12, 27, 0.09);
        border-color: rgba(27, 109, 255, 0.22);
    }

    .case-card .img-wrap {
        overflow: hidden;
    }

    .case-card img {
        transition: transform 0.45s ease;
    }

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

    .section-title-h2 {
        font-size: clamp(24px, 2.4vw, 32px);
        font-weight: 700;
        letter-spacing: 0.01em;
        margin-bottom: 12px;
    }

    .mega-panel {
        position: absolute;
        top: calc(100% + 0px);
        left: 0;
        right: 0;
        background: rgba(10, 16, 30, 0.93);
        backdrop-filter: blur(18px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.38);
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        transition: opacity 0.18s ease-out, transform 0.18s ease-out, visibility 0.18s;
        pointer-events: none;
    }

    .mega-panel.open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        pointer-events: auto;
    }

    .mega-card {
        border-radius: 16px;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.09);
        padding: 18px;
        transition: background 0.2s ease;
    }

    .mega-card:hover {
        background: rgba(27, 109, 255, 0.1);
        border-color: rgba(27, 109, 255, 0.28);
    }

    .mobile-drawer {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: min(84vw, 360px);
        background: #061024;
        border-left: 1px solid rgba(255, 255, 255, 0.12);
        z-index: 100;
        padding: 24px 20px;
        transform: translateX(100%);
        transition: transform 0.25s ease;
        visibility: hidden;
        overflow-y: auto;
    }

    .mobile-drawer.open {
        transform: translateX(0);
        visibility: visible;
    }

    .mobile-nav-link {
        display: flex;
        align-items: center;
        height: 48px;
        border-radius: 10px;
        color: #D5DBE3;
        text-decoration: none;
        padding: 0 16px;
        font-size: 16px;
        transition: background 0.15s ease, color 0.15s ease;
    }

    .mobile-nav-link:hover, .mobile-nav-link.active {
        color: #fff;
        background: rgba(27, 109, 255, 0.2);
    }

    .drawer-overlay {
        position: fixed;
        inset: 0;
        background: rgba(2, 6, 17, 0.58);
        backdrop-filter: blur(2px);
        z-index: 90;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.2s ease, visibility 0.2s;
    }

    .drawer-overlay.open {
        opacity: 1;
        visibility: visible;
    }

    .industry-strip {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 12px 8px;
        color: #9AA6B5;
        font-size: 14px;
    }

    .industry-strip .dot {
        width: 4px;
        height: 4px;
        border-radius: 50%;
        background: var(--signal);
        opacity: 0.6;
    }

    .feature-row {
        border-bottom: 1px solid rgba(2, 12, 27, 0.08);
        padding: 24px 0;
    }

    .feature-row:last-child {
        border-bottom: 0;
    }

    .scenario-number {
        font-family: "DIN Alternate", Inter, "Helvetica Neue", sans-serif;
        font-size: 28px;
        font-weight: 600;
        color: var(--primary);
        letter-spacing: 0.02em;
    }

    .plan-step {
        background: rgba(255, 255, 255, 0.055);
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: 18px;
        padding: 24px;
        position: relative;
    }

    .plan-step .step-num {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--primary);
        color: #fff;
        font-weight: 700;
        box-shadow: 0 0 0 6px rgba(27, 109, 255, 0.14);
        margin-bottom: 14px;
    }

    .faq-item {
        background: #fff;
        border: 1px solid #E7ECF2;
        border-radius: 16px;
        margin-bottom: 14px;
        overflow: hidden;
        transition: border-color 0.2s ease;
    }

    .faq-item[open] {
        border-color: rgba(27, 109, 255, 0.28);
        box-shadow: 0 8px 24px rgba(2, 12, 27, 0.05);
    }

    .faq-question {
        list-style: none;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        padding: 18px 20px;
        font-size: 16px;
        font-weight: 600;
        color: #152032;
        cursor: pointer;
        user-select: none;
        transition: color 0.2s ease;
    }

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

    .faq-item[open] .faq-question {
        color: var(--primary);
    }

    .faq-icon {
        position: relative;
        width: 22px;
        height: 22px;
        flex-shrink: 0;
        border-radius: 50%;
        border: 1px solid rgba(27, 109, 255, 0.3);
        transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
    }

    .faq-icon::before,
    .faq-icon::after {
        content: "";
        position: absolute;
        top: 50%;
        left: 50%;
        width: 10px;
        height: 1.8px;
        background: var(--primary);
        border-radius: 4px;
        transform: translate(-50%, -50%);
        transition: transform 0.2s ease;
    }

    .faq-icon::after {
        transform: translate(-50%, -50%) rotate(90deg);
    }

    .faq-item[open] .faq-icon {
        background: rgba(27, 109, 255, 0.1);
        transform: rotate(45deg);
    }

    .faq-answer {
        padding: 4px 22px 22px;
        color: #56647A;
        line-height: 1.85;
        font-size: 15px;
    }

    .cta-band {
        position: relative;
        background: linear-gradient(100deg, #0B1528 0%, #0E2A58 55%, #164470 100%);
        overflow: hidden;
        border-radius: 24px;
    }

    .cta-band::after {
        content: "";
        position: absolute;
        width: 280px;
        height: 280px;
        border-radius: 50%;
        background: rgba(34, 211, 238, 0.09);
        top: -120px;
        right: 40px;
        filter: blur(50px);
    }

    .footer {
        background: #060B14;
        position: relative;
        overflow: hidden;
    }

    .footer-watermark {
        pointer-events: none;
        position: absolute;
        right: -20px;
        bottom: -80px;
        font-size: 260px;
        font-weight: 800;
        color: rgba(255, 255, 255, 0.04);
        line-height: 1;
        user-select: none;
        z-index: 0;
    }

    .footer a {
        color: #93A6BC;
        text-decoration: none;
        transition: color 0.2s ease;
    }

    .footer a:hover {
        color: #fff;
    }

    .footer-title {
        color: #E8EDF4;
        font-size: 15px;
        font-weight: 600;
        margin-bottom: 14px;
    }

    .footer-sub {
        color: #748094;
        font-size: 14px;
        line-height: 1.8;
    }

    .copyright-line {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        color: #5F6B80;
        font-size: 13px;
    }

    .dark-section {
        background: var(--ink-deep);
        color: #C1C9D4;
    }

    .dark-section-soft {
        background: var(--ink-soft);
        color: #C1C9D4;
    }

    .section-white {
        background: #fff;
    }

    .section-mist {
        background: #F4F6FA;
    }

    .img-placeholder {
        min-height: 120px;
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
        display: flex;
        align-items: center;
        justify-content: center;
        color: rgba(255, 255, 255, 0.35);
    }

    .skip-link {
        position: absolute;
        left: -9999px;
        top: 8px;
        z-index: 200;
        background: #1B6DFF;
        color: #fff;
        padding: 8px 16px;
        border-radius: 8px;
        text-decoration: none;
    }

    .skip-link:focus {
        left: 8px;
    }

    @media (max-width: 767px) {
        .section-pad {
            padding-top: 64px;
            padding-bottom: 64px;
        }

        .hero {
            min-height: 0;
            padding-bottom: 48px;
        }

        .nav-desktop {
            display: none !important;
        }

        .mobile-nav-toggle {
            display: inline-flex !important;
        }
    }

    @media (min-width: 768px) {
        .mobile-nav-toggle {
            display: none !important;
        }
    }

    @media (max-width: 1023px) {
        .nav-list {
            gap: 4px;
        }

        .nav-link {
            padding: 8px 10px;
            font-size: 14px;
        }
    }

    @media (prefers-reduced-motion: reduce) {
        * {
            animation-duration: 0.01ms !important;
            transition-duration: 0.01ms !important;
        }

        html {
            scroll-behavior: auto;
        }
    }

/* roulang page: category1 */
:root {
            --brand: #1B6DFF;
            --brand-hover: #2E7EFF;
            --signal: #22D3EE;
            --amber: #F2A33C;
            --bg-dark: #080D1A;
            --bg-sub: #101827;
            --text-white: #F8FAFC;
            --text-body: #B0B8C4;
            --text-dim: #748094;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --glow-blue: 0 0 0 1px rgba(27, 109, 255, 0.35), 0 10px 40px -6px rgba(27, 109, 255, 0.55);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            background: var(--bg-dark);
            color: var(--text-body);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; }
        img { display: block; max-width: 100%; }
        button, input, select, textarea { font-family: inherit; }

        .container-xl {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section-pad { padding: 96px 0; }
        .text-glow { text-shadow: 0 0 30px rgba(34, 211, 238, 0.25); }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 12px;
            font-size: 13px;
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.07);
            color: #CBD5E1;
            border: 1px solid rgba(255, 255, 255, 0.1);
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--brand);
            color: #fff;
            padding: 13px 28px;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 10px;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all .25s ease;
            box-shadow: var(--glow-blue);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .btn-primary:hover { background: #2E7EFF; transform: translateY(-2px); box-shadow: 0 0 0 1px rgba(46, 126, 255, 0.45), 0 16px 50px -6px rgba(27, 109, 255, 0.7); }
        .btn-primary:active { transform: translateY(1px) scale(0.99); }

        .btn-outline {
            background: rgba(255, 255, 255, 0.05);
            color: #F8FAFC;
            padding: 13px 26px;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.35);
            transition: all .25s ease;
        }
        .btn-outline:hover { border-color: var(--brand); background: rgba(27, 109, 255, 0.2); color: #fff; transform: translateY(-2px); }
        .btn-outline:active { transform: scale(0.98); }

        .section-label {
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.14em;
            color: var(--signal);
            text-transform: uppercase;
        }
        .section-title {
            font-size: clamp(28px, 3.2vw, 36px);
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-top: 12px;
        }
        .section-head-desc { max-width: 720px; margin-top: 14px; font-size: 16px; color: var(--text-body); }

        .glass-card {
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: var(--radius-md);
        }

        .item-card {
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 16px;
            overflow: hidden;
            transition: all .3s ease;
        }
        .item-card:hover {
            border-color: rgba(34, 211, 238, 0.3);
            transform: translateY(-4px);
            box-shadow: 0 20px 40px -18px rgba(0, 0, 0, 0.6);
        }

        .spec-line {
            display: flex; align-items: center; gap: 8px;
            font-size: 14px; color: var(--text-body);
        }
        .spec-line i { color: var(--brand-hover); font-size: 14px; }

        .footer { position: relative; overflow: hidden; background: #050A16; border-top: 1px solid rgba(255, 255, 255, 0.05); }
        .footer-watermark {
            position: absolute; right: -20px; bottom: -70px; font-size: 260px; font-weight: 800;
            color: rgba(255, 255, 255, 0.02); pointer-events: none; line-height: 1;
        }
        .footer-title { font-size: 15px; color: #F8FAFC; font-weight: 600; margin-bottom: 18px; }
        .footer a:hover { color: #fff; }
        .copyright-line { border-top: 1px solid rgba(255, 255, 255, 0.07); font-size: 14px; color: #64748B; }

        .format-card {
            background: rgba(255, 255, 255, 0.03);
            border-radius: 14px;
            padding: 24px;
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all .3s;
        }
        .format-card:hover { border-color: rgba(219, 234, 254, 0.2); }

        .faq-answer {
            display: none;
            color: var(--text-body);
            padding: 2px 0 16px;
            line-height: 1.9;
            font-size: 15px;
        }
        .faq-item.active .faq-answer { display: block; animation: fadeUp .3s ease; }
        .faq-item.active .faq-toggle { transform: rotate(45deg); color: var(--brand-hover); border-color: var(--brand); }
        @keyframes fadeUp { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }
        .faq-toggle {
            width: 32px; height: 32px; border-radius: 8px; border: 1px solid rgba(255, 255, 255, 0.2);
            display: inline-flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 300;
            transition: all .3s;
            color: #94A3B8;
            background: transparent;
        }

        .form-control {
            width: 100%;
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 12px 16px;
            font-size: 14px;
            color: #E2E8F0;
            transition: border-color .2s;
        }
        .form-control::placeholder { color: #64748B; }
        .form-control:focus { outline: none; border-color: var(--brand); }
        textarea.form-control { resize: vertical; min-height: 112px; }

        .table-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

        @media (max-width: 768px) {
            .section-pad { padding: 64px 0; }
            .table-row { grid-template-columns: 1fr; }
        }
        .mega-panel { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(6, 16, 36, 0.94); backdrop-filter: blur(18px); border-bottom: 1px solid rgba(255, 255, 255, 0.08); box-shadow: 0 24px 60px -16px rgba(0,0,0,0.5); border-radius: 0 0 18px 18px; z-index: 60; }
        .mega-panel.open { display: block; animation: megaIn .2s ease-out; }
        @keyframes megaIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
        .site-header { position: sticky; top: 0; z-index: 90; width: 100%; background: rgba(8, 13, 26, 0.88); backdrop-filter: blur(16px); }
        .mobile-drawer { position: fixed; top: 0; right: -320px; width: 300px; height: 100vh; background: #061024; z-index: 100; transition: right .3s ease; display: block; overflow-y: auto; }
        .mobile-drawer.open { right: 0; box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5); }
        .drawer-overlay { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.6); z-index: 99; opacity: 0; pointer-events: none; transition: opacity .3s; }
        .drawer-overlay.open { opacity: 1; pointer-events: auto; }

        .hero-banner-product {
            position: relative;
            background: radial-gradient(ellipse 60% 60% at 25% 20%, rgba(27, 109, 255, 0.25) 0%, transparent 70%),
                        linear-gradient(135deg, #0A1428 0%, #0B1222 45%, #101A30 100%);
            overflow: hidden;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero-grid-lines {
            position: absolute; inset: 0; pointer-events: none;
            background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
            background-size: 56px 56px;
            mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 70%);
        }
        .rating-num { font-size: 32px; font-weight: 700; color: #fff; line-height: 1.2; }
        .rating-unit { font-size: 14px; color: var(--text-body); display: block; margin-top: 4px; }

        .product-tab {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 14px;
            border: 1px solid rgba(255,255,255,0.14);
            border-radius: 999px;
            color: #94A3B8;
            transition: all .2s;
        }
        .product-tab:hover { color: #fff; border-color: var(--brand); }
        .product-tab.active { background: var(--brand); color: #fff; border-color: var(--brand); }

/* roulang page: article */
:root {
            --bg-deep: #080D1A;
            --bg-sub: #101827;
            --brand: #1B6DFF;
            --brand-hover: #2E7EFF;
            --cyan: #22D3EE;
            --amber: #F2A33C;
            --success: #34D399;
            --text-main: #F8FAFC;
            --text-soft: #B0B8C4;
            --text-dim: #748094;
            --radius-xl: 20px;
            --radius-lg: 14px;
            --radius-md: 10px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, .28), 0 1px 2px rgba(0, 0, 0, .2);
            --shadow-btn: 0 0 0 1px rgba(27, 109, 255, .35), 0 10px 40px -6px rgba(27, 109, 255, .55);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        }

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

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

        body {
            font-family: var(--font-cn);
            background: var(--bg-deep);
            color: var(--text-soft);
            line-height: 1.65;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            font: inherit;
            border: 0;
            background: none;
            color: inherit;
            cursor: pointer;
        }

        input,
        textarea {
            font: inherit;
        }

        .container-xl {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 按钮 ===== */
        .btn-primary,
        .btn-secondary,
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 24px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            transition: background .22s ease, transform .18s ease, border-color .22s ease, box-shadow .22s ease, color .22s ease;
            outline-offset: 3px;
        }

        .btn-primary {
            background: linear-gradient(180deg, #2A78FF, #1B6DFF);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .12);
            box-shadow: var(--shadow-btn);
        }

        .btn-primary:hover {
            background: linear-gradient(180deg, #3A88FF, #2E7EFF);
            box-shadow: 0 0 0 1px rgba(27, 109, 255, .45), 0 14px 46px -6px rgba(27, 109, 255, .7);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0) scale(.99);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 3px;
        }

        .btn-secondary {
            background: transparent;
            border: 1px solid rgba(148, 163, 184, .65);
            color: #475569;
        }

        .btn-secondary:hover {
            background: rgba(27, 109, 255, .08);
            border-color: rgba(27, 109, 255, .55);
            color: #1B6DFF;
            transform: translateY(-1px);
        }

        .btn-secondary:active {
            transform: translateY(0) scale(.99);
        }

        .btn-secondary:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 3px;
        }

        .btn-ghost {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .22);
            color: #F8FAFC;
            backdrop-filter: blur(8px);
        }

        .btn-ghost:hover {
            background: rgba(27, 109, 255, .24);
            border-color: rgba(27, 109, 255, .65);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-ghost:active {
            transform: translateY(0) scale(.99);
        }

        .btn-ghost:focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 3px;
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 70;
            background: rgba(6, 11, 24, .88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, .06);
        }

        .utility-bar {
            background: rgba(2, 6, 18, .6);
            border-bottom: 1px solid rgba(255, 255, 255, .045);
            font-size: 12px;
            color: rgba(148, 163, 184, .85);
            letter-spacing: .02em;
        }

        .utility-bar .container-xl {
            height: 34px;
        }

        .main-nav {
            position: relative;
            display: flex;
            align-items: center;
            height: 72px;
            gap: 8px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-mark {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: linear-gradient(135deg, #1B6DFF 0%, #0D48C4 100%);
            color: #fff;
            font-weight: 800;
            font-size: 16px;
            letter-spacing: .04em;
            box-shadow: 0 8px 24px -6px rgba(27, 109, 255, .7);
        }

        .logo-text {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            line-height: 1.2;
        }

        .logo-text small {
            display: block;
            color: var(--text-dim);
            font-size: 11px;
            font-weight: 400;
            letter-spacing: .04em;
            margin-top: 2px;
        }

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

        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            color: var(--text-soft);
            font-size: 15px;
            font-weight: 500;
            padding: 9px 2px;
            transition: color .2s ease;
            white-space: nowrap;
        }

        .nav-link:hover,
        .nav-link.active {
            color: #fff;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            height: 2px;
            width: 0;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--brand), var(--cyan));
            transition: width .24s ease;
        }

        .nav-link.active::after,
        .nav-link:hover::after {
            width: 100%;
        }

        .mega-trigger {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, .1);
            background: rgba(255, 255, 255, .04);
            color: #cbd5e1;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: border-color .2s ease, background .2s ease, color .2s ease, transform .2s ease;
            flex-shrink: 0;
        }

        .mega-trigger:hover {
            border-color: rgba(34, 211, 238, .55);
            background: rgba(27, 109, 255, .18);
            color: #fff;
            transform: rotate(5deg);
        }

        .mega-trigger:focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 3px;
        }

        .mega-trigger.mega-open {
            background: rgba(27, 109, 255, .24);
            border-color: rgba(27, 109, 255, .65);
            color: #fff;
        }

        .mobile-nav-toggle {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, .12);
            background: rgba(255, 255, 255, .06);
            color: #fff;
            align-items: center;
            justify-content: center;
        }

        @media (min-width: 1024px) {
            .mobile-nav-toggle {
                display: none;
            }
        }

        .mega-panel {
            position: absolute;
            left: 0;
            right: 0;
            top: 100%;
            background: rgba(12, 20, 38, .96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid rgba(255, 255, 255, .07);
            border-bottom: 1px solid rgba(255, 255, 255, .07);
            box-shadow: 0 26px 60px -18px rgba(0, 0, 0, .62);
            opacity: 0;
            visibility: hidden;
            transform: translateY(-8px);
            transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
            z-index: 50;
        }

        .mega-panel.mega-open {
            opacity: 1;
            visibility: visible;
            transform: none;
        }

        .mega-card {
            border: 1px solid transparent;
            border-radius: 12px;
            transition: background .2s ease, border-color .2s ease, transform .2s ease;
        }

        .mega-card:hover {
            background: rgba(255, 255, 255, .06);
            border-color: rgba(255, 255, 255, .08);
            transform: translateX(3px);
        }

        .mobile-nav-panel {
            display: none;
            position: absolute;
            left: 0;
            right: 0;
            top: 100%;
            background: rgba(8, 15, 32, .98);
            backdrop-filter: blur(18px);
            border-top: 1px solid rgba(255, 255, 255, .07);
            border-bottom: 1px solid rgba(255, 255, 255, .07);
            max-height: 82vh;
            overflow-y: auto;
            z-index: 52;
        }

        .mobile-nav-panel.open {
            display: block;
        }

        @media (min-width: 1024px) {
            .mobile-nav-panel {
                display: none !important;
            }
        }

        .mobile-nav-item {
            display: block;
            padding: 13px 16px;
            border-radius: 10px;
            color: #cbd5e1;
            font-size: 15px;
            font-weight: 500;
            transition: background .2s ease, color .2s ease;
        }

        .mobile-nav-item:hover,
        .mobile-nav-item.active {
            color: #fff;
            background: rgba(255, 255, 255, .07);
        }

        .mobile-nav-sub {
            font-size: 13px;
            color: var(--text-dim);
        }

        /* ===== 文章页 ===== */
        .article-page-main {
            background: transparent;
        }

        .article-hero-zone {
            position: relative;
            background: #080D1A;
            overflow: hidden;
            padding: 64px 0 128px;
        }

        .article-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url("/assets/images/backpic/back-1.webp");
            background-size: cover;
            background-position: center;
            opacity: .26;
        }

        .article-hero-cover {
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(8, 13, 26, .96) 22%, rgba(8, 13, 26, .78) 60%, rgba(8, 13, 26, .55) 100%);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            color: #7f8ea3;
            font-size: 13px;
            letter-spacing: .02em;
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb .dim {
            color: #57657a;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: .08em;
            color: #22D3EE;
            background: rgba(34, 211, 238, .1);
            border: 1px solid rgba(34, 211, 238, .22);
            padding: 5px 12px;
            border-radius: 999px;
            text-transform: uppercase;
        }

        .pinned-flag {
            color: #F2A33C;
            background: rgba(242, 163, 60, .12);
            border-color: rgba(242, 163, 60, .32);
        }

        .article-page-title {
            max-width: 880px;
            margin-top: 18px;
            color: #fff;
            font-size: clamp(26px, 3.4vw, 42px);
            line-height: 1.3;
            font-weight: 700;
            letter-spacing: -.01em;
        }

        .article-meta-line {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px 22px;
            margin-top: 24px;
            color: #98a5bb;
            font-size: 14px;
        }

        .article-meta-line .meta-dot {
            width: 4px;
            height: 4px;
            border-radius: 999px;
            background: rgba(255, 255, 255, .25);
            display: inline-block;
        }

        .article-reading-zone {
            background: #EAF0F7;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr);
            gap: 26px;
            align-items: start;
            padding-bottom: 72px;
        }

        .article-card {
            margin-top: -84px;
            background: #fff;
            border-radius: 20px;
            box-shadow: 0 20px 44px -20px rgba(2, 12, 32, .28), 0 0 0 1px rgba(255, 255, 255, .7);
            padding: 42px 46px;
            position: relative;
            z-index: 2;
        }

        .article-body {
            color: #2f3a4c;
            font-size: 16px;
            line-height: 1.95;
        }

        .article-body p {
            margin: 1.35em 0;
            color: #3e4a5e;
        }

        .article-body h2 {
            font-size: 25px;
            line-height: 1.4;
            font-weight: 700;
            color: #0f172a;
            margin: 2.2em 0 .8em;
            padding-bottom: .55em;
            border-bottom: 1px solid #e4eaf1;
            scroll-margin-top: 130px;
        }

        .article-body h3 {
            font-size: 20px;
            line-height: 1.45;
            font-weight: 700;
            color: #13203a;
            margin: 1.9em 0 .7em;
            scroll-margin-top: 130px;
        }

        .article-body h4 {
            font-size: 17px;
            line-height: 1.5;
            font-weight: 700;
            color: #1a293f;
            margin: 1.6em 0 .6em;
        }

        .article-body a {
            color: #1B6DFF;
            text-decoration: underline;
            text-underline-offset: 4px;
            text-decoration-thickness: 1px;
            transition: color .2s ease;
        }

        .article-body a:hover {
            color: #0c4fd4;
        }

        .article-body ul,
        .article-body ol {
            margin: 1.3em 0;
            padding-left: 1.5em;
        }

        .article-body ul {
            list-style: disc;
        }

        .article-body ol {
            list-style: decimal;
        }

        .article-body li {
            margin: .5em 0;
        }

        .article-body blockquote {
            margin: 1.8em 0;
            padding: 16px 22px;
            border-left: 3px solid #1B6DFF;
            background: #f4f7fc;
            border-radius: 0 12px 12px 0;
            color: #445069;
        }

        .article-body img {
            border-radius: 14px;
            margin: 1.8em auto;
            box-shadow: 0 12px 28px -12px rgba(0, 0, 0, .3);
        }

        .article-body figure {
            margin: 1.8em 0;
        }

        .article-body figcaption {
            text-align: center;
            color: #8a97a8;
            font-size: 13px;
            margin-top: 8px;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            margin: 1.6em 0;
            display: block;
            overflow-x: auto;
        }

        .article-body th,
        .article-body td {
            border: 1px solid #dfe6ef;
            padding: 11px 13px;
            text-align: left;
        }

        .article-body th {
            background: #f5f8fc;
            color: #18243a;
            font-weight: 600;
        }

        .article-body code {
            padding: 2px 7px;
            border-radius: 6px;
            background: #0f172a;
            color: #d1e6ff;
            font-size: .92em;
        }

        .article-body pre {
            background: #0b1424;
            color: #d6e4ff;
            padding: 18px 20px;
            border-radius: 12px;
            overflow-x: auto;
            margin: 1.6em 0;
            line-height: 1.7;
        }

        .article-body pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        .article-body .cta-box,
        .article-body .note-box {
            border: 1px solid rgba(27, 109, 255, .28);
            background: linear-gradient(180deg, rgba(27, 109, 255, .06), rgba(27, 109, 255, .015));
            border-radius: 14px;
            padding: 20px 22px;
            margin: 1.8em 0;
        }

        .article-body .cta-box a {
            margin-top: 12px;
            display: inline-flex;
        }

        .article-divider {
            height: 1px;
            background: #e6ebf2;
            margin: 40px 0 26px;
        }

        .article-foot {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 14px;
        }

        .article-toc {
            display: none;
            position: sticky;
            top: 130px;
        }

        @media (min-width: 1280px) {
            .article-layout {
                grid-template-columns: minmax(0, 1fr) 272px;
            }

            .article-toc {
                display: block;
            }
        }

        .article-toc-inner {
            background: rgba(255, 255, 255, .82);
            border: 1px solid rgba(226, 232, 240, .95);
            border-radius: 16px;
            padding: 22px 20px;
            box-shadow: 0 10px 26px -18px rgba(15, 23, 42, .35);
        }

        .article-toc-inner .toc-label {
            font-size: 12px;
            font-weight: 700;
            color: #94a3b8;
            letter-spacing: .12em;
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .article-toc-inner ul {
            list-style: none;
            display: grid;
            gap: 4px;
        }

        .article-toc-inner li a {
            color: #526175;
            font-size: 13px;
            line-height: 1.5;
            display: block;
            padding: 7px 10px;
            border-left: 2px solid transparent;
            border-radius: 0 8px 8px 0;
            transition: color .2s ease, border-color .2s ease, background .2s ease;
        }

        .article-toc-inner li a:hover,
        .article-toc-inner li a.toc-active {
            color: #1B6DFF;
            border-left-color: #1B6DFF;
            background: rgba(27, 109, 255, .07);
        }

        .article-toc-inner li.sub-item a {
            padding-left: 24px;
            font-size: 12px;
            color: #728097;
        }

        .article-related-zone {
            background: #EAF0F7;
            padding-bottom: 64px;
        }

        .article-cta-zone {
            position: relative;
            background: #080D1A;
            overflow: hidden;
        }

        .article-cta-bg {
            position: absolute;
            inset: 0;
            background-image: url("/assets/images/backpic/back-2.png");
            background-size: cover;
            background-position: center 20%;
            opacity: .22;
        }

        .article-cta-cover {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, #080D1A 0%, rgba(8, 13, 26, .82) 45%, rgba(8, 13, 26, .45) 100%);
        }

        .article-empty-zone {
            min-height: 70vh;
            display: flex;
            align-items: center;
            background:
                linear-gradient(rgba(8, 13, 26, .82), rgba(8, 13, 26, .96)),
                url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
        }

        .empty-card {
            background: rgba(255, 255, 255, .055);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 20px;
            backdrop-filter: blur(16px);
            max-width: 590px;
            margin: 0 auto;
            padding: 56px 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
        }

        .empty-card h1 {
            color: #fff;
            font-size: 28px;
            margin-top: 20px;
            font-weight: 700;
        }

        .empty-card p {
            color: #8c9bb0;
            line-height: 1.8;
            font-size: 15px;
            margin-top: 14px;
        }

        /* ===== 页脚 ===== */
        .footer {
            position: relative;
            background: #060c1a;
            border-top: 1px solid rgba(255, 255, 255, .05);
            color: #94a3b8;
            overflow: hidden;
        }

        .footer-watermark {
            position: absolute;
            right: -20px;
            bottom: -110px;
            font-size: 320px;
            line-height: 1;
            font-weight: 800;
            color: rgba(255, 255, 255, .018);
            pointer-events: none;
            user-select: none;
            z-index: 0;
        }

        .footer .logo-text {
            color: #fff;
            font-size: 15px;
        }

        .footer-title {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-sub {
            color: #8d9bb1;
            font-size: 14px;
            line-height: 1.8;
        }

        .footer ul li a {
            color: #8d9bb1;
            transition: color .2s ease, transform .2s ease;
        }

        .footer ul li a:hover {
            color: #22D3EE;
            transform: translateX(2px);
        }

        .footer .copyright-line {
            border-top: 1px solid rgba(255, 255, 255, .06);
            font-size: 13px;
            color: #64748b;
        }

        /* ===== 通用响应式 ===== */
        @media (max-width: 1023.98px) {
            .nav-desktop {
                display: none;
            }

            .mega-trigger {
                display: none;
            }
        }

        @media (max-width: 767.98px) {
            .utility-bar .container-xl {
                height: auto;
                min-height: 32px;
                padding-top: 7px;
                padding-bottom: 7px;
                gap: 4px;
                flex-wrap: wrap;
            }

            .main-nav {
                height: 64px;
            }

            .logo-mark {
                width: 40px;
                height: 40px;
                border-radius: 11px;
                font-size: 15px;
            }

            .logo-text {
                font-size: 15px;
            }

            .logo-text small {
                font-size: 10px;
            }

            .article-hero-zone {
                padding: 48px 0 118px;
            }

            .article-card {
                margin-top: -76px;
                padding: 26px 20px;
                border-radius: 16px;
            }

            .article-body {
                font-size: 15px;
            }

            .article-body h2 {
                font-size: 21px;
            }

            .article-body h3 {
                font-size: 18px;
            }

            .article-foot {
                flex-direction: column;
                align-items: stretch;
            }

            .btn-primary,
            .btn-secondary,
            .btn-ghost {
                width: auto;
            }
        }

        @media (max-width: 420px) {
            .article-hero-zone {
                padding: 38px 0 96px;
            }

            .article-page-title {
                font-size: 24px;
            }

            .article-meta-line {
                font-size: 13px;
                gap: 10px 14px;
            }

            .article-card {
                padding: 22px 16px;
            }

            .article-body h2 {
                font-size: 20px;
            }

            .article-related-zone .grid-cols-1 {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category2 */
:root {
        --bg-deep: #080D1A;
        --bg-mid: #101827;
        --bg-panel: #121B2B;
        --glass: rgba(255, 255, 255, 0.045);
        --glass-strong: rgba(255, 255, 255, 0.08);
        --glass-border: rgba(255, 255, 255, 0.09);
        --brand: #1B6DFF;
        --brand-hover: #2E7EFF;
        --cyan: #22D3EE;
        --amber: #F2A33C;
        --green: #34D399;
        --text-main: #F8FAFC;
        --text-secondary: #B0B8C4;
        --text-dim: #748094;
        --radius-lg: 20px;
        --radius-md: 14px;
        --radius-sm: 10px;
        --shadow-card: 0 10px 30px rgba(0, 0, 0, .28), 0 1px 2px rgba(0, 0, 0, .2);
    }

    html {
        scroll-behavior: smooth;
    }

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

    ::selection {
        background: rgba(34, 211, 238, .25);
        color: #fff;
    }

    #app,
    main {
        background: transparent;
    }

    .container-xl {
        max-width: 1240px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    /* ============ Header ============ */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 50;
        background: rgba(8, 13, 26, .82);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(255, 255, 255, .06);
    }

    .utility-bar {
        background: linear-gradient(90deg, rgba(27, 109, 255, .18), rgba(8, 13, 26, .4));
        border-bottom: 1px solid rgba(255, 255, 255, .04);
        font-size: 12px;
        color: var(--text-secondary);
        padding: 6px 0;
        letter-spacing: .01em;
    }

    .main-nav {
        display: flex;
        align-items: center;
        gap: 18px;
        height: 72px;
    }

    .logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        text-decoration: none;
        flex-shrink: 0;
    }

    .logo-mark {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: 12px;
        background: var(--brand);
        color: #fff;
        font-weight: 800;
        font-size: 16px;
        letter-spacing: .02em;
        box-shadow: 0 8px 22px -8px rgba(27, 109, 255, .65);
    }

    .logo-text {
        display: flex;
        flex-direction: column;
        color: #fff;
        font-weight: 700;
        font-size: 19px;
        line-height: 1.15;
        white-space: nowrap;
    }

    .logo-text small {
        font-weight: 400;
        font-size: 11px;
        color: var(--text-secondary);
        letter-spacing: .04em;
        margin-top: 2px;
    }

    .nav-list {
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .nav-desktop .nav-link {
        display: inline-flex;
        align-items: center;
        padding: 8px 16px;
        font-size: 15px;
        color: var(--text-secondary);
        text-decoration: none;
        border-radius: 10px;
        transition: color .2s;
        position: relative;
        font-weight: 500;
    }

    .nav-desktop .nav-link:hover {
        color: #fff;
        background: rgba(255, 255, 255, .05);
    }

    .nav-desktop .nav-link.active {
        color: #fff;
    }

    .nav-desktop .nav-link.active::after {
        content: "";
        position: absolute;
        left: 16px;
        right: 16px;
        bottom: 3px;
        height: 2px;
        border-radius: 10px;
        background: linear-gradient(90deg, var(--cyan), transparent);
    }

    .mega-trigger,
    .mobile-nav-toggle {
        background: rgba(255, 255, 255, .06);
        border: 1px solid rgba(255, 255, 255, .12);
        color: #fff;
        width: 40px;
        height: 40px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
        transition: all .2s;
        cursor: pointer;
    }

    .mega-trigger:hover,
    .mobile-nav-toggle:hover {
        background: rgba(27, 109, 255, .25);
        border-color: rgba(27, 109, 255, .45);
    }

    .mega-trigger:focus-visible,
    .mobile-nav-toggle:focus-visible,
    .mobile-menu a:focus-visible,
    .btn:focus-visible {
        outline: 2px solid var(--cyan);
        outline-offset: 2px;
    }

    .mega-panel {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(9, 14, 27, .92);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-bottom: 1px solid rgba(255, 255, 255, .08);
        border-top: 1px solid rgba(255, 255, 255, .05);
        box-shadow: 0 30px 50px -15px rgba(0, 0, 0, .45);
    }

    .mega-panel.open {
        display: block;
        animation: megaIn .2s ease-out;
    }

    @keyframes megaIn {
        from {
            opacity: 0;
            transform: translateY(-8px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .mega-card {
        display: block;
        text-decoration: none;
        padding: 12px 14px;
        border-radius: 12px;
        border: 1px solid transparent;
        transition: all .2s;
    }

    .mega-card:hover {
        background: rgba(255, 255, 255, .06);
        border-color: rgba(255, 255, 255, .09);
    }

    .mobile-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #061024;
        border-bottom: 1px solid rgba(255, 255, 255, .08);
        padding: 16px;
        z-index: 60;
    }

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

    .mobile-menu a {
        display: block;
        padding: 12px 14px;
        color: var(--text-secondary);
        text-decoration: none;
        border-radius: 10px;
        font-size: 15px;
    }

    .mobile-menu a:hover,
    .mobile-menu a.active {
        background: rgba(255, 255, 255, .07);
        color: #fff;
    }

    /* ============ Buttons ============ */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-weight: 600;
        font-size: 15px;
        line-height: 1.2;
        padding: 13px 24px;
        border-radius: 12px;
        border: 1px solid transparent;
        cursor: pointer;
        transition: all .2s ease;
        text-decoration: none;
        white-space: nowrap;
    }

    .btn-primary {
        background: var(--brand);
        color: #fff;
        border-color: var(--brand);
        box-shadow: 0 0 0 1px rgba(27, 109, 255, .35), 0 10px 40px -8px rgba(27, 109, 255, .55);
    }

    .btn-primary:hover {
        background: var(--brand-hover);
        border-color: #3d8aff;
        box-shadow: 0 0 0 1px rgba(27, 109, 255, .6), 0 16px 44px -8px rgba(27, 109, 255, .72);
        transform: translateY(-1px);
    }

    .btn-primary:active {
        transform: translateY(1px) scale(.99);
    }

    .btn-secondary {
        background: rgba(255, 255, 255, .04);
        color: #fff;
        border-color: rgba(255, 255, 255, .32);
        backdrop-filter: blur(6px);
    }

    .btn-secondary:hover {
        background: rgba(27, 109, 255, .16);
        border-color: rgba(34, 211, 238, .55);
        color: #fff;
        transform: translateY(-1px);
    }

    .btn-secondary:active {
        transform: translateY(1px) scale(.99);
    }

    .btn-amber {
        background: var(--amber);
        color: #0e1420;
        border-color: var(--amber);
        font-weight: 700;
    }

    .btn-amber:hover {
        background: #ffb255;
        border-color: #ffb255;
        box-shadow: 0 10px 32px -10px rgba(242, 163, 60, .6);
    }

    .btn-sm {
        padding: 9px 16px;
        font-size: 13px;
        border-radius: 10px;
    }

    /* ============ Hero ============ */
    .page-hero {
        position: relative;
        background-image: linear-gradient(80deg, rgba(8, 13, 26, .95) 0%, rgba(10, 19, 34, .72) 58%, rgba(15, 26, 46, .55) 100%), url('/assets/images/backpic/back-1.webp');
        background-size: cover;
        background-position: center;
        padding: 74px 0 88px;
        overflow: hidden;
    }

    .page-hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background-image: linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .025) 1px, transparent 1px);
        background-size: 52px 52px;
        pointer-events: none;
        z-index: 0;
    }

    .breadcrumb {
        position: relative;
        z-index: 2;
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: var(--text-secondary);
        margin-bottom: 22px;
    }

    .breadcrumb a {
        color: var(--text-secondary);
        text-decoration: none;
    }

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

    .page-hero h1 {
        position: relative;
        z-index: 2;
        font-size: 38px;
        line-height: 1.26;
        font-weight: 700;
        max-width: 760px;
        letter-spacing: .01em;
    }

    .page-hero h1 .grad-text {
        background: linear-gradient(90deg, #6ea8ff, #22D3EE);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }

    .hero-lead {
        position: relative;
        z-index: 2;
        margin-top: 22px;
        max-width: 660px;
        color: var(--text-secondary);
        font-size: 16.5px;
    }

    .hero-actions {
        position: relative;
        z-index: 2;
        display: flex;
        gap: 14px;
        margin-top: 34px;
        flex-wrap: wrap;
    }

    .hero-badges {
        position: relative;
        z-index: 2;
        margin-top: 40px;
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }

    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 8px 14px;
        border-radius: 40px;
        background: rgba(255, 255, 255, .07);
        border: 1px solid rgba(255, 255, 255, .12);
        color: #cfd8e3;
        font-size: 13px;
        backdrop-filter: blur(8px);
    }

    .hero-badge i {
        color: var(--cyan);
        font-size: 11px;
    }

    /* ============ Anchor chips ============ */
    .scene-anchors {
        border-bottom: 1px solid rgba(255, 255, 255, .08);
        background: rgba(16, 24, 39, .55);
        padding: 18px 0;
        position: sticky;
        top: 72px;
        z-index: 20;
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
    }

    .scene-anchors-inner {
        display: flex;
        align-items: center;
        gap: 12px;
        overflow-x: auto;
        scrollbar-width: thin;
    }

    .anchor-chip {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        flex-shrink: 0;
        padding: 9px 17px;
        border-radius: 100px;
        color: var(--text-secondary);
        border: 1px solid rgba(255, 255, 255, .11);
        background: rgba(255, 255, 255, .04);
        font-size: 14px;
        text-decoration: none;
        transition: all .2s;
    }

    .anchor-chip:hover {
        border-color: rgba(34, 211, 238, .5);
        color: #fff;
        background: rgba(34, 211, 238, .07);
    }

    .anchor-chip .num {
        color: var(--cyan);
        font-weight: 600;
        font-size: 12px;
    }

    /* ============ Blocks ============ */
    .section-block {
        padding: 84px 0;
    }

    .section-label {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        letter-spacing: .12em;
        color: var(--cyan);
        text-transform: uppercase;
        font-weight: 600;
    }

    .section-label::before {
        content: "";
        width: 26px;
        height: 1px;
        background: var(--cyan);
        opacity: .7;
    }

    .section-title {
        color: #fff;
        font-weight: 700;
        font-size: 32px;
        line-height: 1.3;
        margin: 12px 0 12px;
    }

    .section-desc {
        color: var(--text-secondary);
        max-width: 680px;
        font-size: 15.5px;
        margin-bottom: 32px;
    }

    /* Solution giant cards */
    .solution-row {
        display: grid;
        gap: 24px;
    }

    .solution-card {
        position: relative;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0;
        border-radius: var(--radius-lg);
        background: linear-gradient(180deg, rgba(255, 255, 255, .075) 0%, rgba(255, 255, 255, .02) 100%);
        border: 1px solid rgba(255, 255, 255, .09);
        overflow: hidden;
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        box-shadow: var(--shadow-card);
        margin-bottom: 26px;
        transition: border-color .3s ease, transform .3s ease;
    }

    .solution-card:hover {
        border-color: rgba(34, 211, 238, .32);
        transform: translateY(-3px);
    }

    .solution-image-wrap {
        position: relative;
        min-height: 300px;
    }

    .solution-image-wrap img {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }

    .solution-image-wrap::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(105deg, transparent 40%, rgba(8, 13, 26, .75) 100%);
    }

    .solution-content {
        padding: 38px 34px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .sol-index {
        font-size: 13px;
        color: var(--cyan);
        font-weight: 700;
        letter-spacing: .08em;
        margin-bottom: 10px;
    }

    .solution-content h3 {
        font-size: 23px;
        color: #fff;
        font-weight: 700;
        line-height: 1.35;
        margin-bottom: 12px;
    }

    .solution-content p {
        color: var(--text-secondary);
        font-size: 15px;
        margin-bottom: 16px;
    }

    .feature-mini-list {
        display: flex;
        flex-direction: column;
        gap: 10px;
        margin: 8px 0 20px;
        padding: 0;
        list-style: none;
    }

    .feature-mini-list li {
        display: flex;
        align-items: flex-start;
        gap: 10px;
        color: #c3cbd6;
        font-size: 14px;
    }

    .feature-mini-list li i {
        color: var(--green);
        margin-top: 4px;
        font-size: 13px;
    }

    /* details toggle */
    .solution-toggle {
        border-top: 1px solid rgba(255, 255, 255, .1);
        margin-top: 12px;
        padding-top: 14px;
    }

    .solution-toggle summary {
        cursor: pointer;
        list-style: none;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        color: var(--cyan);
        font-size: 14px;
        font-weight: 600;
        transition: color .2s;
    }

    .solution-toggle summary:hover {
        color: #fff;
    }

    .solution-toggle summary::-webkit-details-marker {
        display: none;
    }

    .solution-toggle summary i {
        font-size: 12px;
        transition: transform .25s ease;
        color: var(--cyan);
    }

    .solution-toggle[open] summary i {
        transform: rotate(45deg);
    }

    .toggle-body {
        margin-top: 16px;
        padding: 18px 20px;
        border-radius: 14px;
        background: rgba(255, 255, 255, .045);
        border: 1px solid rgba(255, 255, 255, .1);
    }

    .toggle-body h6 {
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        margin-bottom: 8px;
    }

    .toggle-body ul {
        margin: 0;
        padding: 0 0 0 16px;
        display: grid;
        gap: 8px;
        color: var(--text-secondary);
        font-size: 14px;
    }

    /* ============ Process ============ */
    .process-section {
        background: #0d1424;
        border-top: 1px solid rgba(255, 255, 255, .06);
        border-bottom: 1px solid rgba(255, 255, 255, .06);
        padding: 92px 0;
        position: relative;
        overflow: hidden;
    }

    .process-section::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(closest-side at 15% 15%, rgba(27, 109, 255, .14), transparent 70%), radial-gradient(closest-side at 90% 80%, rgba(34, 211, 238, .08), transparent 70%);
        pointer-events: none;
    }

    .process-grid {
        position: relative;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        margin-top: 32px;
    }

    .process-node {
        position: relative;
        padding: 0 20px;
        text-align: left;
    }

    .process-node:not(:last-child)::after {
        content: "";
        position: absolute;
        top: 26px;
        right: 0;
        width: 100%;
        height: 1px;
        background: repeating-linear-gradient(90deg, rgba(255, 255, 255, .2) 0 5px, transparent 5px 9px);
    }

    .process-number {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 52px;
        height: 52px;
        border-radius: 16px;
        background: linear-gradient(145deg, rgba(27, 109, 255, .25), rgba(27, 109, 255, .06));
        border: 1px solid rgba(27, 109, 255, .4);
        color: #fff;
        font-size: 20px;
        font-weight: 800;
        margin-bottom: 18px;
    }

    .process-node h4 {
        color: #fff;
        font-size: 18px;
        font-weight: 600;
        margin-bottom: 8px;
    }

    .process-node p {
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.7;
    }

    /* ============ CTA strip ============ */
    .cta-strip {
        position: relative;
        border-radius: 22px;
        background-image: linear-gradient(90deg, #0B1B36, #102642), url('/assets/images/backpic/back-3.png');
        background-size: cover;
        background-blend-mode: soft-light;
        background-position: center;
        border: 1px solid rgba(34, 211, 238, .24);
        padding: 42px 46px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 20px;
        overflow: hidden;
        box-shadow: 0 20px 70px -28px rgba(27, 109, 255, .4);
    }

    .cta-strip::after {
        content: "";
        position: absolute;
        right: -40px;
        top: -40px;
        width: 260px;
        height: 260px;
        border: 1px solid rgba(255, 255, 255, .05);
        border-radius: 40%;
        transform: rotate(26deg);
        pointer-events: none;
    }

    .cta-title {
        color: #fff;
        font-size: 26px;
        font-weight: 700;
        line-height: 1.4;
    }

    .cta-sub {
        color: #c4cfdd;
        font-size: 14px;
        max-width: 600px;
        margin-top: 6px;
    }

    .cta-actions {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
    }

    /* ============ FAQ ============ */
    .faq-shell {
        display: grid;
        grid-template-columns: 300px 1fr;
        gap: 44px;
        margin-top: 40px;
    }

    .faq-shell aside {
        position: sticky;
        top: 170px;
        align-self: start;
        background: rgba(255, 255, 255, .025);
        border: 1px solid rgba(255, 255, 255, .08);
        border-radius: 18px;
        padding: 28px 24px;
    }

    .faq-shell aside h3 {
        color: #fff;
        font-size: 18px;
        font-weight: 600;
    }

    .faq-shell aside p {
        color: var(--text-secondary);
        font-size: 14px;
        margin: 10px 0 18px;
    }

    .faq-list {
        display: grid;
        gap: 0;
    }

    .faq-item {
        border-bottom: 1px solid rgba(255, 255, 255, .09);
    }

    .faq-item:first-child {
        border-top: 1px solid rgba(255, 255, 255, .09);
    }

    .faq-q {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
        padding: 20px 4px;
        cursor: pointer;
        color: #e5e9ee;
        font-weight: 600;
        font-size: 16px;
        transition: color .2s;
    }

    .faq-q:hover,
    .faq-item[open] .faq-q {
        color: #fff;
    }

    .faq-q .icon {
        flex-shrink: 0;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 29px;
        height: 29px;
        border-radius: 8px;
        border: 1px solid rgba(255, 255, 255, .2);
        color: var(--cyan);
        font-style: normal;
        font-size: 16px;
        transition: transform .25s ease, background .2s;
    }

    .faq-item[open] .faq-q .icon {
        transform: rotate(45deg);
        background: rgba(34, 211, 238, .12);
        border-color: rgba(34, 211, 238, .5);
    }

    .faq-a {
        padding: 2px 24px 18px 0;
        color: var(--text-secondary);
        font-size: 15px;
        max-width: 680px;
        line-height: 1.8;
        margin-left: 4px;
    }

    /* ============ Card ============ */
    .value-panel {
        background: rgba(255, 255, 255, .02);
        border: 1px solid rgba(255, 255, 255, .08);
        border-radius: 20px;
        padding: 24px;
        transition: background .25s;
    }

    .value-panel:hover {
        background: rgba(255, 255, 255, .045);
    }

    .value-panel .value-icon {
        width: 42px;
        height: 42px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 12px;
        background: rgba(27, 109, 255, .15);
        color: var(--cyan);
    }

    /* ============ Section bg ============ */
    .bg-panel-inverse {
        background: #0d1424;
        border-top: 1px solid rgba(255, 255, 255, .06);
        border-bottom: 1px solid rgba(255, 255, 255, .06);
    }

    .split-card {
        display: grid;
        grid-template-columns: 1.1fr 1fr;
        border-radius: 22px;
        background: linear-gradient(180deg, rgba(255, 255, 255, .05), transparent);
        border: 1px solid rgba(255, 255, 255, .09);
        overflow: hidden;
    }

    .split-card-img {
        min-height: 340px;
        position: relative;
    }

    .split-card-img img {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .split-card-content {
        padding: 48px;
    }

    /* ============ Footer ============ */
    .footer {
        background: #05080f;
        position: relative;
        overflow: hidden;
    }

    .footer::before {
        content: "";
        position: absolute;
        left: 0;
        right: 0;
        top: 0;
        height: 1px;
        background: linear-gradient(90deg, transparent, rgba(27, 109, 255, .5), rgba(34, 211, 238, .5), transparent);
    }

    .footer-watermark {
        position: absolute;
        right: -40px;
        bottom: -120px;
        font-size: 340px;
        font-weight: 900;
        letter-spacing: -.04em;
        color: rgba(255, 255, 255, .018);
        line-height: 1;
        z-index: 0;
        pointer-events: none;
        user-select: none;
    }

    .footer a {
        color: var(--text-secondary);
        text-decoration: none;
        transition: color .15s;
    }

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

    .footer-title {
        color: #dbe2ea;
        font-weight: 600;
        font-size: 15px;
        margin-bottom: 14px;
        letter-spacing: .04em;
    }

    .footer-sub {
        color: var(--text-dim);
        font-size: 13.5px;
        line-height: 1.8;
    }

    .copyright-line {
        border-top: 1px solid rgba(255, 255, 255, .08);
        font-size: 13px;
        color: var(--text-dim);
    }

    /* ============ Responsive ============ */
    @media (max-width: 1024px) {
        .solution-card {
            grid-template-columns: 1fr;
        }

        .solution-image-wrap {
            min-height: 220px;
        }

        .split-card {
            grid-template-columns: 1fr;
        }

        .process-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 40px 10px;
        }

        .process-node:nth-child(2)::after {
            display: none;
        }

        .process-node:not(:last-child)::after {
            width: 0;
            height: 0;
        }

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

        .faq-shell aside {
            position: static;
        }
    }

    @media (max-width: 767px) {
        .nav-desktop {
            display: none !important;
        }

        .main-nav {
            height: 62px;
        }

        .scene-anchors {
            top: 62px;
        }

        .page-hero {
            padding: 48px 0 62px;
        }

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

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

        .section-title {
            font-size: 25px;
        }

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

        .solution-content {
            padding: 26px 20px;
        }

        .solution-card {
            margin-bottom: 16px;
        }

        .solution-image-wrap {
            min-height: 180px;
        }

        .cta-strip {
            padding: 30px 22px;
        }

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

        .process-grid {
            grid-template-columns: 1fr;
            gap: 30px;
        }

        .footer {
            padding-top: 44px;
        }
    }

    @media (max-width: 520px) {
        .logo-text {
            font-size: 17px;
        }

        .logo-text small {
            display: none;
        }

        .section-label {
            font-size: 12px;
        }

        .hero-badges {
            gap: 8px;
        }

        .split-card-content {
            padding: 24px;
        }
    }

/* roulang page: category3 */
:root {
            --brand: #1B6DFF;
            --brand-hover: #2E7EFF;
            --deep: #080D1A;
            --ink: #101827;
            --cyan: #22D3EE;
            --amber: #F2A33C;
            --success: #34D399;
            --soft-bg: #F3F6FC;
            --line: rgba(148, 163, 184, .18);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            background: var(--deep);
            color: #F8FAFC;
            line-height: 1.75;
            font-feature-settings: "tnum" on, "lnum" on;
        }
        img,
        svg,
        video {
            display: block;
            max-width: 100%;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease;
        }
        button {
            cursor: pointer;
            border: 0;
            background: none;
            font-family: inherit;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid rgba(34, 211, 238, .9);
            outline-offset: 2px;
            border-radius: 8px;
        }
        .container-xl {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        /* header */
        .site-header {
            position: relative;
            z-index: 60;
            background: rgba(8, 13, 26, .92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .utility-bar {
            background: #050915;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
            font-size: 13px;
            letter-spacing: .02em;
            color: #B0B8C4;
            padding: 7px 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 14px;
            min-height: 72px;
            position: relative;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--brand);
            font-weight: 800;
            font-size: 17px;
            letter-spacing: .02em;
            color: #fff;
            box-shadow: 0 8px 26px -8px rgba(27, 109, 255, .7);
        }
        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #F8FAFC;
            line-height: 1.2;
            display: flex;
            flex-direction: column;
        }
        .logo-text small {
            font-size: 11.5px;
            font-weight: 400;
            color: #748094;
            margin-top: 3px;
            letter-spacing: .08em;
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 30px;
            margin-left: auto;
        }
        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 500;
            color: #B0B8C4;
            padding: 8px 2px;
            white-space: nowrap;
        }
        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, #22D3EE, #1B6DFF);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .28s ease;
        }
        .nav-link:hover {
            color: #fff;
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }
        .nav-link.active {
            color: #fff;
        }
        .mega-trigger,
        .mobile-nav-toggle {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, .12);
            background: rgba(255, 255, 255, .05);
            color: #cbd5e1;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: border-color .2s, background .2s, color .2s;
        }
        .mega-trigger:hover,
        .mobile-nav-toggle:hover {
            border-color: rgba(34, 211, 238, .5);
            background: rgba(27, 109, 255, .18);
            color: #fff;
        }
        .mobile-nav-toggle {
            display: none;
        }
        /* mega panel */
        .mega-panel {
            position: absolute;
            left: 0;
            right: 0;
            top: 100%;
            max-height: 0;
            overflow: hidden;
            background: rgba(8, 13, 26, .96);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            transition: max-height .35s ease;
            box-shadow: 0 30px 60px -15px rgba(0, 0, 0, .55);
        }
        .mega-panel.open {
            max-height: 620px;
        }
        .mega-card {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, .06);
            background: rgba(255, 255, 255, .04);
        }
        .mega-card:hover {
            background: rgba(27, 109, 255, .14);
            border-color: rgba(27, 109, 255, .35);
        }
        .mega-title {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .12em;
            color: #748094;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .mega-image {
            border-radius: 14px;
            object-fit: cover;
            height: 170px;
            width: 100%;
        }
        /* mobile nav */
        .mobile-nav {
            position: fixed;
            inset: 0;
            background: rgba(6, 16, 36, .98);
            z-index: 100;
            padding: 90px 24px 24px;
            transform: translateX(105%);
            transition: transform .3s ease;
            display: flex;
            flex-direction: column;
            gap: 4px;
            overflow-y: auto;
        }
        .mobile-nav.open {
            transform: translateX(0);
        }
        .mobile-nav a {
            display: flex;
            align-items: center;
            min-height: 48px;
            padding: 0 14px;
            border-radius: 12px;
            color: #d9e2f0;
            font-size: 17px;
        }
        .mobile-nav a:hover,
        .mobile-nav a.active-link {
            background: rgba(27, 109, 255, .22);
            color: #fff;
        }
        .mobile-nav .mobile-close {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, .14);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        /* buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 24px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            border: 1px solid transparent;
            transition: all .2s ease;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--brand);
            color: #fff;
            box-shadow: 0 0 0 1px rgba(27, 109, 255, .35), 0 12px 36px -6px rgba(27, 109, 255, .45);
        }
        .btn-primary:hover {
            background: var(--brand-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 0 0 1px rgba(27, 109, 255, .5), 0 18px 44px -4px rgba(27, 109, 255, .6);
        }
        .btn-primary:active {
            transform: translateY(1px) scale(.99);
        }
        .btn-ghost {
            border-color: rgba(255, 255, 255, .35);
            background: rgba(255, 255, 255, .04);
            color: #E2E8F0;
        }
        .btn-ghost:hover {
            border-color: rgba(34, 211, 238, .7);
            background: rgba(27, 109, 255, .18);
            color: #fff;
        }
        .btn-dark {
            background: #0B1322;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .14);
        }
        .btn-dark:hover {
            background: #141F36;
            color: #fff;
            border-color: rgba(255, 255, 255, .26);
        }
        /* hero */
        .hero-support {
            position: relative;
            overflow: hidden;
            background: #080D1A;
        }
        .hero-bgimg {
            position: absolute;
            inset: 0;
            background-image: url("/assets/images/backpic/back-1.webp");
            background-position: center;
            background-size: cover;
            background-repeat: no-repeat;
            opacity: .4;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(75deg, rgba(8, 13, 26, .98) 0%, rgba(10, 23, 44, .94) 52%, rgba(8, 13, 26, .7) 100%);
        }
        .grid-lines {
            position: absolute;
            right: -4%;
            top: -20%;
            width: 58%;
            height: 140%;
            opacity: .13;
            background-image: linear-gradient(rgba(34, 211, 238, .35) 1px, transparent 1px), linear-gradient(90deg, rgba(34, 211, 238, .35) 1px, transparent 1px);
            background-size: 46px 46px;
            transform: perspective(900px) rotateY(-14deg);
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 13px;
            color: #748094;
            margin-bottom: 18px;
        }
        .breadcrumb a {
            color: #90a4c3;
        }
        .breadcrumb a:hover {
            color: var(--cyan);
        }
        .hero-visual {
            position: relative;
            border-radius: 22px;
            overflow: hidden;
            box-shadow: 0 35px 80px -20px rgba(0, 0, 0, .65);
            border: 1px solid rgba(255, 255, 255, .13);
        }
        .hero-visual-card {
            background: rgba(13, 24, 44, .78);
            border: 1px solid rgba(255, 255, 255, .12);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-radius: 14px;
            padding: 18px 18px;
        }
        .hero-visual-card .dot {
            width: 8px;
            height: 8px;
            border-radius: 99px;
            background: var(--success);
            box-shadow: 0 0 10px rgba(52, 211, 153, .8);
        }
        /* service promise strip */
        .promise-strip {
            position: relative;
            margin-top: -30px;
            z-index: 6;
            border-radius: 18px;
            border: 1px solid rgba(255, 255, 255, .12);
            background: rgba(12, 22, 42, .8);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: 0 22px 52px -18px rgba(0, 0, 0, .45);
        }
        .promise-item {
            padding: 20px 18px;
        }
        .promise-item .num {
            color: var(--amber);
            font-size: 12px;
            font-weight: 700;
            letter-spacing: .1em;
            display: block;
            margin-bottom: 6px;
        }
        .promise-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: #F1F5F9;
            margin: 0 0 8px;
        }
        .promise-item p {
            font-size: 13px;
            color: #8fa3bc;
            line-height: 1.6;
            margin: 0;
        }
        /* service rows */
        .service-row {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 26px 4px;
            border-bottom: 1px solid var(--line);
            transition: background .2s ease, padding-left .2s ease;
        }
        .service-row:hover {
            background: linear-gradient(90deg, rgba(27, 109, 255, .07), transparent);
            padding-left: 16px;
        }
        .service-row .s-idx {
            font-weight: 800;
            font-size: 22px;
            color: rgba(27, 109, 255, .2);
            letter-spacing: .02em;
            line-height: 1.2;
            min-width: 48px;
            font-variant-numeric: tabular-nums;
        }
        .service-row:hover .s-idx {
            color: var(--brand);
        }
        .service-row h3 {
            font-size: 18px;
            font-weight: 700;
            color: #0F172A;
            margin: 0 0 6px;
        }
        .service-row p {
            font-size: 15px;
            color: #475569;
            margin: 0;
            line-height: 1.75;
            max-width: 56ch;
        }
        .service-entry {
            flex-shrink: 0;
            align-self: center;
            margin-left: auto;
            padding: 8px 14px;
            border: 1px solid #cbd5e1;
            border-radius: 10px;
            font-size: 13.5px;
            font-weight: 600;
            color: #0F172A;
            transition: all .2s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #fff;
        }
        .service-entry:hover {
            border-color: var(--brand);
            background: var(--brand);
            color: #fff;
            transform: translateX(2px);
        }
        .rightsheet {
            border-radius: 24px;
            overflow: hidden;
            background: #fff;
            box-shadow: 0 32px 90px -28px rgba(2, 12, 27, .3);
            border: 1px solid rgba(148, 163, 184, .18);
        }
        .rightsheet .inner {
            padding: 26px;
        }
        .sheet-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12.5px;
            font-weight: 700;
            letter-spacing: .08em;
            color: var(--brand);
            background: rgba(27, 109, 255, .08);
            border-radius: 99px;
            padding: 6px 12px;
        }
        .sheet-list {
            margin: 16px 0 0;
            padding: 0;
            list-style: none;
            display: grid;
            gap: 10px;
        }
        .sheet-list li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 14px;
            color: #334155;
        }
        .sheet-list li svg {
            color: var(--success);
            flex-shrink: 0;
            margin-top: 4px;
        }
        /* process */
        .process-step {
            position: relative;
            padding: 28px 8px 8px 8px;
        }
        .step-circle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 54px;
            height: 54px;
            border-radius: 18px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .16);
            font-size: 20px;
            font-weight: 800;
            color: var(--cyan);
            margin-bottom: 18px;
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15);
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            color: #F1F5F9;
            margin: 0 0 10px;
        }
        .process-step p {
            font-size: 14px;
            color: #9FB0C5;
            line-height: 1.7;
            margin: 0;
            max-width: 42ch;
        }
        .arrow-flow {
            display: none;
            color: rgba(148, 163, 184, .5);
            align-items: center;
            justify-content: center;
        }
        @media (min-width:1024px) {
            .arrow-flow {
                display: flex;
            }
        }
        /* topic chip links */
        .topic-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 18px;
            border-radius: 999px;
            border: 1px solid #cbd5e1;
            background: #fff;
            color: #334155;
            font-size: 14px;
            font-weight: 600;
            transition: all .2s ease;
        }
        .topic-link:hover {
            border-color: var(--brand);
            color: var(--brand);
            transform: translateY(-2px);
            box-shadow: 0 10px 22px -12px rgba(27, 109, 255, .6);
        }
        .topic-link .t-dot {
            width: 6px;
            height: 6px;
            border-radius: 99px;
            background: var(--cyan);
        }
        /* FAQ */
        .faq-widget {
            border-bottom: 1px solid var(--line);
        }
        .faq-widget:first-of-type {
            border-top: 1px solid var(--line);
        }
        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 22px 6px;
            cursor: pointer;
        }
        .faq-q .faq-q-title {
            font-size: 17px;
            font-weight: 600;
            color: #0F172A;
            margin: 0;
            line-height: 1.5;
            transition: color .18s;
        }
        .faq-q:hover .faq-q-title {
            color: var(--brand);
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 9px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid #cbd5e1;
            color: #64748b;
            transition: transform .3s, color .2s, border-color .2s;
            font-weight: 800;
            font-size: 18px;
        }
        .faq-widget.open .faq-icon {
            transform: rotate(135deg);
            border-color: var(--brand);
            color: var(--brand);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .45s ease;
        }
        .faq-a-inner {
            padding-bottom: 26px;
            padding-right: 30px;
            font-size: 15px;
            color: #334155;
            line-height: 1.8;
            max-width: 72ch;
        }
        /* contact form */
        .support-form-card {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .12);
            border-radius: 24px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            padding: 28px;
        }
        .form-field label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .04em;
            color: #B0B8C4;
            margin-bottom: 6px;
        }
        .form-field input,
        .form-field textarea {
            width: 100%;
            border-radius: 12px;
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .12);
            color: #F1F5F9;
            font-size: 15px;
            padding: 12px 14px;
            font-family: inherit;
            transition: border-color .2s, box-shadow .2s, background .2s;
        }
        .form-field input::placeholder,
        .form-field textarea::placeholder {
            color: #64748b;
        }
        .form-field input:focus,
        .form-field textarea:focus {
            border-color: var(--brand);
            background: rgba(27, 109, 255, .06);
            box-shadow: 0 0 0 3px rgba(27, 109, 255, .14);
            outline: none;
        }
        .captcha-code {
            font-weight: 800;
            letter-spacing: .15em;
            color: var(--cyan);
            background: rgba(255, 255, 255, .07);
            border: 1px dashed rgba(255, 255, 255, .2);
            border-radius: 10px;
            font-size: 15px;
            padding: 11px 16px;
            display: inline-flex;
            align-items: center;
        }
        .form-note {
            font-size: 13px;
            color: #8fa3bc;
        }
        /* mini CTA */
        .cta-bar {
            background: linear-gradient(100deg, rgba(8, 13, 26, .98) 0%, #0B1B36 55%, rgba(10, 28, 53, .95) 100%);
            position: relative;
            overflow: hidden;
            border-top: 1px solid rgba(27, 109, 255, .3);
            border-bottom: 1px solid rgba(27, 109, 255, .3);
        }
        .cta-bar:before {
            content: "";
            position: absolute;
            top: -100%;
            left: 20%;
            width: 120px;
            height: 400%;
            transform: rotate(18deg);
            background: linear-gradient(90deg, transparent, rgba(34, 211, 238, .18), transparent);
        }
        /* footer */
        .footer {
            background: #050915;
            border-top: 1px solid rgba(255, 255, 255, .06);
        }
        .footer-sub {
            color: #8fa3bc;
            font-size: 14px;
            line-height: 1.8;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #E2E8F0;
            margin-bottom: 18px;
            letter-spacing: .03em;
        }
        .footer ul a {
            color: #8fa3bc;
        }
        .footer ul a:hover {
            color: var(--cyan);
        }
        .footer-watermark {
            position: absolute;
            right: -5px;
            bottom: -35px;
            font-size: 260px;
            line-height: 1;
            font-weight: 800;
            color: rgba(255, 255, 255, .028);
            pointer-events: none;
            user-select: none;
            letter-spacing: -.08em;
        }
        .copyright-line {
            border-top: 1px solid rgba(255, 255, 255, .07);
            color: #64748b;
            font-size: 13px;
        }
        .copyright-line span:last-child {
            letter-spacing: .02em;
            opacity: .7;
        }
        /* section helpers */
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12.5px;
            font-weight: 700;
            letter-spacing: .14em;
            color: var(--brand);
            text-transform: uppercase;
            background: rgba(27, 109, 255, .09);
            border: 1px solid rgba(27, 109, 255, .12);
            border-radius: 99px;
            padding: 6px 13px;
        }
        .title-divider {
            width: 52px;
            height: 4px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--brand), var(--cyan));
        }
        /* media queries */
        @media (max-width:1023px) {
            .nav-desktop {
                display: none;
            }
            .main-nav {
                min-height: 66px;
            }
            .mega-trigger {
                display: none;
            }
            .mobile-nav-toggle {
                display: inline-flex;
            }
            .mega-panel {
                display: none;
            }
            .service-row {
                flex-wrap: wrap;
            }
            .service-entry {
                margin-left: 64px;
            }
        }
        @media (max-width:767px) {
            .utility-bar {
                display: none;
            }
            .logo-text {
                font-size: 16px;
            }
            .logo-text small {
                font-size: 10px;
            }
            .promise-strip {
                margin-top: -20px;
            }
            .service-row {
                padding: 22px 0;
            }
            .service-row .s-idx {
                min-width: 38px;
            }
            .support-form-card {
                padding: 20px;
            }
            .copyright-line {
                flex-direction: column;
                text-align: center;
            }
            .footer .grid {
                gap: 30px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: .01ms !important;
                transition-duration: .01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }