/* roulang page: index */
:root {
        --bg-base: #060D1F;
        --bg-soft: #0A1226;
        --bg-panel: #0D1730;
        --brand: #4F7DFF;
        --brand-glow: #29E6FF;
        --accent: #F5B848;
        --text-main: #F0F4FF;
        --text-sub: #A9B8D8;
        --text-light: #6A7DA3;
        --glass-bg: rgba(255, 255, 255, 0.06);
        --glass-border: rgba(255, 255, 255, 0.12);
        --glass-strong: rgba(255, 255, 255, 0.10);
        --radius-card: 18px;
        --radius-btn: 10px;
        --shadow-glow: 0 0 0 1px rgba(41, 230, 255, .2), 0 10px 40px -10px rgba(41, 230, 255, .35);
        --font-sans: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        background-color: var(--bg-base);
        color: var(--text-main);
        font-family: var(--font-sans);
        line-height: 1.7;
        margin: 0;
        -webkit-font-smoothing: antialiased;
        background-image: linear-gradient(rgba(15, 27, 55, .25) 1px, transparent 1px),
            linear-gradient(90deg, rgba(15, 27, 55, .18) 1px, transparent 1px);
        background-size: 44px 44px;
    }

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

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

    button,
    input,
    select,
    textarea {
        font-family: inherit;
        font-size: 1rem;
    }

    .container-x {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 32px;
    }

    /* ===== Header ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 80;
        height: 72px;
        display: flex;
        align-items: center;
        background: rgba(6, 13, 31, 0.22);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        transition: background .3s, box-shadow .3s, border-color .3s;
        padding: 0 20px;
    }

    .site-header.scrolled {
        background: rgba(6, 13, 31, 0.92);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        box-shadow: 0 10px 28px rgba(0, 0, 0, .25);
    }

    .nav-shell {
        max-width: 1200px;
        width: 100%;
        margin: 0 auto;
        display: flex;
        align-items: center;
        gap: 16px;
        position: relative;
    }

    .brand-logo {
        font-size: 1.25rem;
        font-weight: 700;
        letter-spacing: .02em;
        color: #fff;
        white-space: nowrap;
        display: flex;
        align-items: center;
        gap: 8px;
        line-height: 1.25;
    }

    .logo-mark {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: linear-gradient(145deg, rgba(79, 125, 255, .35), rgba(41, 230, 255, .12));
        position: relative;
        border: 1px solid rgba(255, 255, 255, .14);
        flex: 0 0 36px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .logo-mark::after {
        content: "";
        width: 14px;
        height: 14px;
        border-radius: 50%;
        background: var(--brand-glow);
        box-shadow: 0 0 12px rgba(41, 230, 255, .62);
        border: 3px solid rgba(255, 255, 255, .45);
    }

    .main-nav {
        display: flex;
        align-items: center;
        gap: 2px;
        margin-left: 10px;
    }

    .main-nav a {
        position: relative;
        display: inline-flex;
        align-items: center;
        padding: 10px 12px;
        border-radius: 10px;
        font-size: 0.92rem;
        font-weight: 500;
        color: rgba(240, 244, 255, .82);
        transition: background .2s, color .2s;
    }

    .main-nav a:hover {
        background: rgba(255, 255, 255, .08);
        color: #fff;
    }

    .main-nav a.active {
        color: #fff;
        font-weight: 600;
    }

    .main-nav a.active::after {
        content: "";
        position: absolute;
        bottom: 2px;
        left: 14px;
        right: 14px;
        height: 2px;
        border-radius: 4px;
        background: linear-gradient(90deg, var(--brand-glow), var(--brand));
        box-shadow: 0 0 10px rgba(41, 230, 255, .75);
    }

    .nav-cta {
        margin-left: auto;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        cursor: pointer;
        font-weight: 600;
        border: 1px solid transparent;
        border-radius: var(--radius-btn);
        transition: transform .18s, box-shadow .25s, background .25s, border-color .2s;
        outline: none;
        white-space: nowrap;
    }

    .btn:active {
        transform: scale(.97);
    }

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

    .btn-primary {
        background: #3B7BFF;
        color: #fff;
        border-color: rgba(79, 125, 255, .45);
        box-shadow: 0 6px 22px rgba(41, 230, 255, .16);
    }

    .btn-primary:hover {
        background: #4f84ff;
        border-color: rgba(41, 230, 255, .4);
        box-shadow: 0 0 0 1px rgba(41, 230, 255, .22), 0 12px 32px -8px rgba(41, 230, 255, .42);
    }

    .btn-ghost {
        background: rgba(255, 255, 255, .04);
        color: #F0F4FF;
        border-color: rgba(255, 255, 255, .36);
        backdrop-filter: blur(8px);
    }

    .btn-ghost:hover {
        background: rgba(255, 255, 255, .1);
        border-color: rgba(41, 230, 255, .55);
        box-shadow: var(--shadow-glow);
    }

    .btn-sm {
        padding: 8px 16px;
        font-size: .9rem;
    }

    .btn-md {
        padding: 13px 24px;
        font-size: .98rem;
    }

    .btn-lg {
        padding: 15px 34px;
        font-size: 1.04rem;
    }

    .burger-btn {
        display: none;
        width: 42px;
        height: 42px;
        align-items: center;
        justify-content: center;
        background: rgba(255, 255, 255, .06);
        border: 1px solid rgba(255, 255, 255, .12);
        border-radius: 10px;
        cursor: pointer;
        margin-left: auto;
    }

    .mobile-nav {
        position: fixed;
        z-index: 70;
        top: 62px;
        left: 16px;
        right: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        padding: 20px 18px;
        background: rgba(6, 13, 31, .94);
        border: 1px solid var(--glass-border);
        border-radius: 18px;
        backdrop-filter: blur(18px);
        box-shadow: 0 18px 44px rgba(0, 0, 0, .38);
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        transition: opacity .25s, transform .25s, visibility .25s;
    }

    .mobile-nav.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .mobile-nav a {
        padding: 13px 16px;
        border-radius: 12px;
        color: #F0F4FF;
        font-weight: 500;
        background: rgba(255, 255, 255, .04);
        border: 1px solid rgba(255, 255, 255, .04);
    }

    .mobile-nav a.active {
        background: rgba(79, 125, 255, .22);
        border-color: rgba(41, 230, 255, .24);
        color: #fff;
    }

    .mobile-nav .btn {
        margin-top: 8px;
    }

    /* ===== Hero ===== */
    .hero {
        min-height: max(720px, 100vh);
        position: relative;
        display: flex;
        align-items: center;
        overflow: hidden;
        padding-top: 72px;
        color: #fff;
        background-image:
            linear-gradient(rgba(6, 13, 31, 0.78), rgba(6, 13, 31, 0.55)),
            url("/assets/images/backpic/back-1.webp");
        background-size: cover;
        background-position: center 30%;
        background-repeat: no-repeat;
    }

    .hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: radial-gradient(620px 420px at 72% 36%, rgba(41, 230, 255, .24), transparent 70%),
            radial-gradient(520px 360px at 25% 15%, rgba(79, 125, 255, .16), transparent 65%);
        pointer-events: none;
    }

    .hero::after {
        content: "";
        position: absolute;
        left: 0;
        right: 0;
        bottom: 0;
        height: 160px;
        background: linear-gradient(to bottom, rgba(6, 13, 31, 0), var(--bg-base));
        pointer-events: none;
    }

    .hero-content {
        position: relative;
        z-index: 5;
        width: 100%;
    }

    .hero-grid {
        display: flex;
        align-items: center;
        gap: 48px;
        padding: 80px 0 110px;
    }

    .hero-info {
        flex: 0 0 54%;
    }

    .hero-title {
        font-size: clamp(2.4rem, 5vw, 4.5rem);
        font-weight: 800;
        line-height: 1.15;
        letter-spacing: -0.02em;
        margin: 0 0 22px;
    }

    .hero-title .grad-accent {
        background: linear-gradient(110deg, #ffffff 20%, rgba(240, 244, 255, .72));
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }

    .hero-sub {
        font-size: clamp(1.05rem, 1.6vw, 1.35rem);
        color: rgba(240, 244, 255, .92);
        background: rgba(255, 255, 255, .08);
        display: inline-flex;
        align-items: center;
        gap: 10px;
        border: 1px solid rgba(255, 255, 255, .16);
        padding: 8px 18px;
        border-radius: 999px;
        margin-bottom: 26px;
        backdrop-filter: blur(8px);
    }

    .hero-text {
        color: var(--text-sub);
        max-width: 620px;
        font-size: 1.06rem;
        margin: 0 0 32px;
        letter-spacing: .01em;
    }

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

    .hero-trust {
        position: absolute;
        z-index: 4;
        left: 32px;
        bottom: 28px;
        right: 32px;
        display: flex;
        flex-wrap: wrap;
        gap: 12px 26px;
        color: rgba(240, 244, 255, .65);
        font-size: .84rem;
        justify-content: center;
    }

    .hero-trust svg {
        width: 16px;
        height: 16px;
        color: var(--brand-glow);
    }

    .hero-visual {
        flex: 1 1 38%;
        max-width: 460px;
        margin-left: auto;
        min-width: 300px;
        position: relative;
    }

    .hero-panel {
        border-radius: 24px;
        overflow: hidden;
        border: 1px solid rgba(255, 255, 255, .15);
        background: rgba(255, 255, 255, .08);
        box-shadow: 0 30px 60px rgba(0, 0, 0, .35);
        transform: rotate(1.4deg);
    }

    .hero-panel img {
        width: 100%;
        aspect-ratio: 4 / 3;
        object-fit: cover;
        opacity: .88;
        mix-blend-mode: lighten;
    }

    .hero-float-badge {
        position: absolute;
        bottom: 26px;
        left: -12px;
        padding: 14px 18px;
        background: rgba(10, 18, 38, .82);
        backdrop-filter: blur(14px);
        border: 1px solid rgba(41, 230, 255, .34);
        border-radius: 16px;
        color: #fff;
        display: flex;
        align-items: center;
        gap: 12px;
        box-shadow: var(--shadow-glow);
    }

    .float-dot {
        width: 9px;
        height: 9px;
        border-radius: 50%;
        background: var(--brand-glow);
        box-shadow: 0 0 10px var(--brand-glow);
        animation: pulse 1.8s infinite;
    }

    @keyframes pulse {
        0% {
            opacity: 1;
            transform: scale(.8);
        }
        60% {
            opacity: .6;
            transform: scale(1.3);
        }
        100% {
            opacity: 1;
            transform: scale(.8);
        }
    }

    /* ===== Sections ===== */
    .section {
        padding: 96px 0;
        position: relative;
    }

    .section.tight {
        padding: 66px 0;
    }

    .section-sub {
        color: var(--brand-glow);
        font-size: .86rem;
        font-weight: 600;
        letter-spacing: .08em;
        margin-bottom: 10px;
    }

    .section-title {
        font-size: clamp(1.6rem, 3vw, 2.4rem);
        font-weight: 700;
        line-height: 1.3;
        margin: 0 0 12px;
        letter-spacing: -0.01em;
    }

    .section-desc {
        color: var(--text-sub);
        max-width: 760px;
        margin: 0 0 40px;
        font-size: 1.01rem;
    }

    .glass-card {
        background: rgba(255, 255, 255, .05);
        border: 1px solid var(--glass-border);
        border-radius: var(--radius-card);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        transition: transform .25s, background .3s, box-shadow .3s, border-color .3s;
    }

    .glass-card:hover {
        transform: translateY(-4px);
        background: rgba(255, 255, 255, .08);
        box-shadow: 0 18px 44px rgba(0, 0, 0, .3);
        border-color: rgba(41, 230, 255, .3);
    }

    .card-pad {
        padding: 30px 26px;
    }

    .service-grid {
        display: grid;
        grid-template-columns: 2fr 1fr;
        gap: 24px;
        align-items: stretch;
    }

    .service-main-card .inner {
        min-height: 100%;
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
        background-image:
            linear-gradient(90deg, rgba(6, 13, 31, .72), rgba(6, 13, 31, .28)),
            url("/assets/images/coverpic/cover-1.webp");
        background-size: cover;
        background-position: top left;
        min-height: 370px;
        border-radius: var(--radius-card);
        padding: 38px;
        border: 1px solid rgba(255, 255, 255, .1);
        position: relative;
        overflow: hidden;
        transition: transform .25s, box-shadow .25s;
    }

    .service-main-card:hover .inner {
        transform: translateY(-5px);
        box-shadow: 0 22px 53px rgba(0, 0, 0, .28);
    }

    .service-main-card h3 {
        font-size: 1.8rem;
        font-weight: 700;
        margin-bottom: 12px;
        line-height: 1.3;
    }

    .service-main-card p {
        max-width: 550px;
        color: rgba(240, 244, 255, .86);
        margin-bottom: 20px;
        font-size: 1rem;
    }

    .feature-list {
        display: flex;
        flex-wrap: wrap;
        gap: 10px 16px;
        align-items: center;
        color: rgba(240, 244, 255, .88);
        font-size: .9rem;
        margin-bottom: 24px;
    }

    .feature-list li {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 6px 13px;
        border-radius: 999px;
        background: rgba(255, 255, 255, .12);
        border: 1px solid rgba(255, 255, 255, .06);
    }

    .feature-list svg {
        width: 16px;
        height: 16px;
        color: var(--brand-glow);
    }

    .service-side {
        display: flex;
        flex-direction: column;
        gap: 24px;
        min-width: 0;
    }

    .side-card {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        padding: 30px 24px;
    }

    .side-card .card-icon {
        width: 50px;
        height: 50px;
        border-radius: 13px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(255, 255, 255, .15);
        border: 1px solid rgba(255, 255, 255, .12);
        margin-bottom: 18px;
    }

    .side-card .card-icon svg {
        width: 24px;
        height: 24px;
        color: var(--brand-glow);
    }

    .side-card h3 {
        font-size: 1.2rem;
        font-weight: 600;
        margin: 0 0 10px;
    }

    .side-card p {
        color: var(--text-sub);
        font-size: .94rem;
        margin: 0 0 18px;
    }

    .link-more {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        color: var(--brand-glow);
        font-size: .9rem;
        font-weight: 600;
        transition: gap .2s;
    }

    .link-more:hover {
        gap: 10px;
        color: #6feaff;
    }

    .link-more svg {
        width: 15px;
        height: 15px;
    }

    /* Stats */
    .stats-panel {
        background: rgba(255, 255, 255, .045);
        border: 1px solid rgba(255, 255, 255, .08);
        border-radius: 24px;
        padding: 34px 26px;
        grid-gap: 0;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
    }

    .stat-cell {
        text-align: center;
        padding: 18px 15px;
        border-right: 1px solid rgba(255, 255, 255, .08);
    }

    .stat-cell:last-child {
        border-right: none;
    }

    .stat-num {
        font-size: clamp(2rem, 4vw, 3rem);
        font-weight: 800;
        line-height: 1.2;
        background: linear-gradient(130deg, #FFFFFF, rgba(41, 230, 255, .9));
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        font-variant-numeric: tabular-nums;
        text-shadow: none;
    }

    .stat-label {
        color: var(--text-sub);
        margin-top: 7px;
        font-size: .93rem;
    }

    .stat-extra {
        display: block;
        color: var(--text-light);
        font-size: .78rem;
        margin-top: 5px;
        font-weight: 400;
    }

    /* Cases */
    .case-layout {
        display: flex;
        gap: 24px;
        align-items: stretch;
    }

    .case-feature {
        flex: 1.25;
        border-radius: 22px;
        overflow: hidden;
        position: relative;
        min-height: 410px;
        background: rgba(255, 255, 255, .04);
        border: 1px solid rgba(255, 255, 255, .1);
        transition: transform .25s, border-color .3s, box-shadow .3s;
    }

    .case-feature:hover {
        transform: translateY(-5px);
        border-color: rgba(41, 230, 255, .35);
        box-shadow: 0 20px 48px rgba(0, 0, 0, .32);
    }

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

    .case-feature .case-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(6, 13, 31, .05), rgba(6, 13, 31, .82));
    }

    .case-feature .case-desc {
        position: absolute;
        left: 26px;
        right: 26px;
        bottom: 26px;
        color: #fff;
    }

    .case-feature h3 {
        font-size: 1.55rem;
        font-weight: 700;
        margin: 0 0 8px;
    }

    .case-feature p {
        color: rgba(240, 244, 255, .78);
        margin: 0;
    }

    .case-stack {
        flex: 1;
        display: flex;
        flex-direction: column;
        gap: 24px;
        min-width: 0;
    }

    .case-mini {
        flex: 1;
        display: flex;
        align-items: center;
        gap: 24px;
        padding: 16px;
        min-height: 0;
        overflow: hidden;
    }

    .case-mini .case-pic {
        width: 46%;
        flex: 0 0 46%;
        border-radius: 14px;
        overflow: hidden;
        position: relative;
        aspect-ratio: 4 / 3;
        min-height: 0;
    }

    .case-mini .case-pic img {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .4s;
    }

    .case-mini:hover .case-pic img {
        transform: scale(1.03);
    }

    .case-mini .case-text {
        flex: 1;
        min-width: 0;
    }

    .case-mini h3 {
        font-size: 1.08rem;
        font-weight: 600;
        margin: 0 0 10px;
        line-height: 1.4;
    }

    .case-mini p {
        color: var(--text-sub);
        font-size: .9rem;
        margin: 0 0 10px;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .case-mini time {
        color: var(--text-light);
        font-size: .78rem;
    }

    /* News */
    .news-panel {
        background: rgba(255, 255, 255, .03);
        border: 1px solid rgba(255, 255, 255, .06);
        border-radius: 26px;
        padding: 42px;
        margin-top: 54px;
    }

    .news-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .news-item {
        display: block;
        background: rgba(255, 255, 255, .05);
        border: 1px solid rgba(255, 255, 255, .09);
        padding: 22px 22px;
        border-radius: 18px;
        transition: background .25s, transform .25s, border-color .25s, box-shadow .25s;
    }

    .news-item:hover {
        background: rgba(255, 255, 255, .09);
        border-color: rgba(41, 230, 255, .35);
        transform: translateY(-3px);
        box-shadow: 0 16px 34px rgba(0, 0, 0, .2);
    }

    .news-meta {
        display: flex;
        gap: 12px;
        align-items: center;
        margin-bottom: 10px;
        flex-wrap: wrap;
        color: var(--text-light);
        font-size: .8rem;
    }

    .news-meta .cat-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 3px 11px;
        border-radius: 999px;
        color: #FFF;
        background: rgba(79, 125, 255, .18);
        border: 1px solid rgba(41, 230, 255, .18);
        font-weight: 500;
    }

    .news-item h3 {
        font-size: 1.08rem;
        font-weight: 600;
        margin: 0 0 10px;
        line-height: 1.5;
    }

    .news-item p {
        color: var(--text-sub);
        font-size: .93rem;
        margin: 0 0 16px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .news-link {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        font-size: .88rem;
        color: var(--brand-glow);
        font-weight: 500;
    }

    .news-empty {
        border: 1px dashed rgba(255, 255, 255, .18);
        border-radius: 20px;
        padding: 44px 22px;
        text-align: center;
        color: var(--text-light);
        background: rgba(255, 255, 255, .025);
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 14px;
    }

    .empty-icon {
        width: 52px;
        height: 52px;
        border-radius: 50%;
        border: 1px solid rgba(255, 255, 255, .14);
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto;
    }

    .empty-icon svg {
        width: 24px;
        height: 24px;
        color: rgba(255, 255, 255, .6);
    }

    /* Solutions split */
    .split-block {
        display: grid;
        grid-template-columns: 1.1fr .9fr;
        gap: 40px;
        align-items: center;
        padding: 52px 0;
    }

    .split-block+.split-block {
        border-top: 1px solid rgba(255, 255, 255, .08);
        margin-top: 24px;
    }

    .split-text .tag-title {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--brand-glow);
        font-size: .9rem;
        font-weight: 600;
        margin-bottom: 14px;
    }

    .split-text h3 {
        font-size: clamp(1.35rem, 2.3vw, 1.9rem);
        font-weight: 700;
        line-height: 1.35;
        margin: 0 0 14px;
    }

    .split-text p {
        color: var(--text-sub);
        font-size: 1rem;
        margin: 0 0 20px;
        max-width: 560px;
    }

    .split-list {
        display: flex;
        flex-direction: column;
        gap: 12px;
        margin: 0;
        padding: 0;
        list-style: none;
        max-width: 530px;
    }

    .split-list li {
        display: flex;
        align-items: flex-start;
        gap: 11px;
        font-size: .95rem;
        color: rgba(240, 244, 255, .88);
        background: rgba(255, 255, 255, .05);
        border: 1px solid rgba(255, 255, 255, .07);
        padding: 11px 15px;
        border-radius: 12px;
    }

    .split-list svg {
        width: 18px;
        height: 18px;
        color: var(--brand-glow);
        flex: 0 0 18px;
        margin-top: 4px;
    }

    .split-media {
        border-radius: 22px;
        overflow: hidden;
        border: 1px solid rgba(255, 255, 255, .12);
        background: rgba(255, 255, 255, .06);
        min-height: 280px;
    }

    .split-media img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        aspect-ratio: 4 / 3;
    }

    /* FAQ */
    .faq-list {
        max-width: 880px;
        margin: 0 auto;
    }

    .faq-item {
        background: rgba(255, 255, 255, .05);
        border: 1px solid rgba(255, 255, 255, .07);
        border-radius: 16px;
        margin-bottom: 14px;
        padding: 0 22px;
    }

    .faq-item summary {
        list-style: none;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        font-weight: 600;
        font-size: 1rem;
        color: #F0F4FF;
        padding: 20px 0;
        border-bottom: 1px solid transparent;
        transition: color .2s;
    }

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

    .faq-item summary:hover {
        color: #fff;
    }

    .faq-item[open] summary {
        border-bottom: 1px solid rgba(255, 255, 255, .08);
        color: var(--brand-glow);
    }

    .faq-icon {
        width: 26px;
        height: 26px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        background: rgba(255, 255, 255, .08);
        border: 1px solid rgba(255, 255, 255, .15);
        flex: 0 0 26px;
    }

    .faq-icon svg {
        width: 14px;
        height: 14px;
        transition: transform .25s;
        color: #fff;
    }

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

    .faq-body {
        padding: 16px 0 24px;
        color: var(--text-sub);
        line-height: 1.8;
        font-size: .96rem;
    }

    /* CTA form */
    .cta-panel {
        position: relative;
        border-radius: 28px;
        overflow: hidden;
        background:
            linear-gradient(120deg, rgba(79, 125, 255, .28), rgba(13, 23, 48, .75)),
            url("/assets/images/backpic/back-3.webp");
        background-size: cover;
        background-position: center;
        border: 1px solid rgba(255, 255, 255, .15);
        padding: 48px 32px;
        display: grid;
        grid-template-columns: 1fr .9fr;
        gap: 32px;
        align-items: center;
    }

    .cta-panel::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(120deg, rgba(6, 13, 31, .7), rgba(6, 13, 31, .35));
        pointer-events: none;
    }

    .cta-copy,
    .cta-form-box {
        position: relative;
        z-index: 2;
    }

    .cta-copy h2 {
        font-size: clamp(1.8rem, 3.2vw, 2.6rem);
        line-height: 1.25;
        margin: 0 0 18px;
    }

    .cta-copy p {
        font-size: 1rem;
        color: rgba(240, 244, 255, .8);
        max-width: 520px;
        margin: 0;
    }

    .cta-form-box {
        background: rgba(255, 255, 255, .1);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(255, 255, 255, .17);
        border-radius: 20px;
        padding: 28px 24px;
    }

    .form-grid {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .form-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .form-control {
        width: 100%;
        background: rgba(255, 255, 255, .08);
        border: 1px solid rgba(255, 255, 255, .13);
        color: #fff;
        border-radius: 11px;
        padding: 12px 15px;
        transition: border-color .2s;
    }

    .form-control::placeholder {
        color: rgba(169, 184, 216, .6);
    }

    .form-control:focus {
        outline: none;
        border-color: rgba(41, 230, 255, .55);
        box-shadow: 0 0 0 2px rgba(41, 230, 255, .12);
    }

    .form-select {
        appearance: none;
        background-image: linear-gradient(45deg, transparent 50%, #6A7DA3 50%), linear-gradient(135deg, #6A7DA3 50%, transparent 50%);
        background-position: calc(100% - 20px) 56%, calc(100% - 15px) 56%;
        background-size: 5px 5px;
        background-repeat: no-repeat;
    }

    textarea.form-control {
        resize: vertical;
        min-height: 96px;
    }

    /* Footer */
    .site-footer {
        border-top: 1px solid rgba(255, 255, 255, .08);
        background: rgba(6, 13, 31, .9);
        padding-top: 68px;
        margin-top: 40px;
    }

    .footer-top {
        display: grid;
        grid-template-columns: 1.3fr 1fr 1fr 1.1fr;
        gap: 32px;
        padding-bottom: 44px;
    }

    .footer-brand {
        margin-right: 20px;
    }

    .footer-brand .brand-logo {
        margin-bottom: 14px;
    }

    .footer-brand p {
        color: var(--text-sub);
        font-size: .92rem;
        line-height: 1.75;
        margin-bottom: 18px;
        max-width: 340px;
    }

    .footer-tagline {
        color: rgba(240, 244, 255, .82);
        font-size: .92rem;
        line-height: 1.8;
        max-width: 320px;
    }

    .footer-col h4 {
        font-size: 1rem;
        font-weight: 600;
        color: #fff;
        margin: 0 0 16px;
    }

    .footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .footer-col a {
        color: var(--text-sub);
        font-size: .9rem;
        transition: color .2s, padding-left .2s;
    }

    .footer-col a:hover {
        color: var(--brand-glow);
        padding-left: 4px;
    }

    .footer-bottom {
        display: flex;
        flex-wrap: wrap;
        gap: 14px 30px;
        align-items: center;
        justify-content: space-between;
        padding: 22px 0;
        border-top: 1px solid rgba(255, 255, 255, .08);
        color: var(--text-light);
        font-size: .85rem;
    }

    .footer-bottom .copyright {
        color: var(--text-sub);
    }

    .footer-bottom .legal {
        color: var(--text-light);
    }

    .backdrop-blur {
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }

    @media screen and (max-width: 1024px) {
        .main-nav {
            display: none;
        }

        .burger-btn {
            display: flex;
        }

        .flex .btn-primary {
            display: inline-flex;
        }

        .hero-grid {
            flex-direction: column;
            padding: 160px 0 120px;
        }

        .hero-info {
            flex: 1 1 100%;
            max-width: 780px;
        }

        .hero-visual {
            width: min(100%, 520px);
            margin: 0 auto;
            max-width: 520px;
        }

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

        .case-layout {
            flex-direction: column;
        }

        .case-feature {
            min-height: 330px;
        }

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

        .cta-panel {
            grid-template-columns: 1fr;
        }

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

    @media screen and (max-width: 768px) {
        .container-x,
        .hero-trust {
            padding-left: 18px;
            padding-right: 18px;
        }

        .site-header {
            height: 64px;
        }

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

        .hero {
            min-height: max(680px, 100vh);
        }

        .hero-grid {
            padding: 135px 0 120px;
            gap: 34px;
        }

        .hero-actions {
            flex-direction: column;
            align-items: stretch;
        }

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

        .section {
            padding: 68px 0;
        }

        .stats-panel {
            grid-template-columns: repeat(2, 1fr);
            padding: 14px 8px;
        }

        .stat-cell {
            padding: 20px 8px;
        }

        .stat-cell:nth-child(2) {
            border-right: none;
        }

        .stat-cell:nth-child(-n+2) {
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

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

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

        .case-mini {
            flex-direction: column;
            align-items: flex-start;
        }

        .case-mini .case-pic {
            width: 100%;
            flex: 0 0 auto;
            aspect-ratio: 16/9;
        }

        .service-main-card .inner {
            padding: 28px 22px;
            min-height: 430px;
        }

        .service-main-card h3 {
            font-size: 1.4rem;
        }

        .cta-panel {
            padding: 32px 18px;
        }

        .form-row {
            grid-template-columns: 1fr;
        }

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

    @media screen and (max-width: 520px) {
        .brand-logo {
            max-width: 230px;
            overflow: hidden;
            white-space: nowrap;
            text-overflow: ellipsis;
        }

        .logo-mark {
            flex: 0 0 32px;
            width: 32px;
            height: 32px;
        }

        .nav-cta {
            display: none;
        }

        .service-main-card h3 {
            font-size: 1.3rem;
        }

        .case-feature .case-desc {
            left: 18px;
            right: 18px;
            bottom: 18px;
        }

        .section-title {
            font-size: 1.7rem;
        }

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

        .stat-cell {
            border-right: none !important;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .stat-cell:last-child {
            border-bottom: none;
        }

        .card-pad {
            padding: 22px 18px;
        }

        .form-row {
            grid-template-columns: 1fr;
        }

        .footer-bottom {
            flex-direction: column;
            align-items: flex-start;
            line-height: 1.6;
        }
    }

/* roulang page: article */
:root {
            --bg-base: #060D1F;
            --bg-soft: #0A1226;
            --bg-panel: #0D1730;
            --brand: #4F7DFF;
            --brand-glow: #29E6FF;
            --accent: #F5B848;
            --text-main: #F0F4FF;
            --text-sub: #A9B8D8;
            --text-light: #6A7DA3;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-border: rgba(255, 255, 255, 0.12);
            --glass-hover: rgba(255, 255, 255, 0.10);
            --radius-card: 18px;
            --radius-btn: 10px;
            --shadow-glow: 0 0 0 1px rgba(41, 230, 255, .2), 0 10px 40px -10px rgba(41, 230, 255, .35);
            --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Inter", Arial, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            font-family: var(--font-sans);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body::before {
            content: '';
            position: fixed;
            inset: 0;
            z-index: 0;
            pointer-events: none;
            background-image: linear-gradient(rgba(79, 125, 255, 0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(79, 125, 255, 0.02) 1px, transparent 1px);
            background-size: 70px 70px;
        }
        img {
            max-width: 100%;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            font-family: inherit;
        }
        .container-x {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(6, 13, 31, 0.6);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: background .35s ease, box-shadow .35s ease;
        }
        .site-header.scrolled {
            background: rgba(6, 13, 31, 0.93);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
        }
        .nav-shell {
            max-width: 1280px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            height: 70px;
            padding: 0 28px;
            gap: 28px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: 0.01em;
            white-space: nowrap;
            color: #fff;
        }
        .brand-logo .logo-mark {
            width: 28px;
            height: 28px;
            border-radius: 9px;
            background: linear-gradient(135deg, #4F7DFF, #29E6FF);
            box-shadow: 0 0 18px rgba(79, 125, 255, 0.6);
            flex-shrink: 0;
            position: relative;
        }
        .brand-logo .logo-mark::after {
            content: '';
            position: absolute;
            inset: 6px;
            border-radius: 5px;
            background: #060D1F;
            opacity: 0.7;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0 auto;
        }
        .main-nav a {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.93rem;
            font-weight: 500;
            color: #B9C6E4;
            transition: all .25s ease;
            position: relative;
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .main-nav a.active {
            color: #fff;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: #29E6FF;
            border-radius: 2px;
            box-shadow: 0 0 10px rgba(41, 230, 255, 0.5);
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-left: auto;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: all .3s cubic-bezier(.4, 0, .2, 1);
            cursor: pointer;
            border: none;
            font-size: 0.95rem;
            padding: 11px 20px;
        }
        .btn:active {
            transform: scale(0.98);
        }
        .btn:focus-visible {
            outline: 2px solid var(--brand-glow);
            outline-offset: 3px;
        }
        .btn-primary {
            background: #3B7BFF;
            color: #fff;
            box-shadow: 0 0 0 1px rgba(41, 230, 255, .15), 0 6px 24px -6px rgba(41, 230, 255, .25);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #4F7DFF 0%, #29E6FF 100%);
            box-shadow: var(--shadow-glow);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.875rem;
        }
        .btn-sm svg {
            width: 15px;
            height: 15px;
        }
        .burger-btn {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #F0F4FF;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }
        .burger-btn svg {
            width: 22px;
            height: 22px;
        }
        .mobile-panel {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            z-index: 99;
            background: rgba(6, 13, 31, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 24px 28px;
        }
        .mobile-panel.open {
            display: block;
        }
        .mobile-panel a {
            display: block;
            padding: 14px 12px;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 500;
            color: #D6E0F5;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-panel a:last-child {
            border-bottom: none;
        }
        .mobile-panel a:hover {
            background: rgba(255, 255, 255, 0.07);
            color: #fff;
        }
        .mobile-panel .active {
            color: #29E6FF;
        }

        .article-hero {
            padding-top: 160px;
            padding-bottom: 40px;
            background: linear-gradient(150deg, rgba(13, 23, 48, 0.55) 0%, rgba(6, 13, 31, 0.9) 70%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .breadcrumb-wrap {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-sub);
            margin-bottom: 24px;
        }
        .breadcrumb-wrap a {
            color: var(--text-sub);
            transition: color .2s;
        }
        .breadcrumb-wrap a:hover {
            color: var(--brand-glow);
        }
        .breadcrumb-wrap i {
            font-size: 0.7rem;
            opacity: 0.6;
        }
        .breadcrumb-current {
            color: #DCE6FF;
        }
        .article-hero h1 {
            font-size: clamp(1.8rem, 3.2vw, 2.6rem);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: 0.01em;
            max-width: 860px;
            color: #fff;
        }
        .article-meta-row {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px 22px;
            margin-top: 24px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.09);
            color: var(--text-sub);
            font-size: 0.90rem;
        }
        .article-meta-row span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }
        .article-meta-row i {
            color: #29E6FF;
            font-size: 0.85rem;
            width: 16px;
            text-align: center;
        }

        .article-main {
            background: var(--bg-base);
            padding: 60px 0 96px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 50px;
            align-items: start;
        }
        .article-body-card {
            border: 1px solid var(--glass-border);
            background: rgba(13, 23, 48, 0.6);
            border-radius: 20px;
            padding: 48px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }
        .article-content-body {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: #E6EDFA;
            overflow-wrap: break-word;
            word-break: break-word;
        }
        .article-content-body h2 {
            font-size: 1.55rem;
            font-weight: 700;
            margin-top: 44px;
            margin-bottom: 18px;
            color: #FFFFFF;
            padding-left: 16px;
            border-left: 4px solid #29E6FF;
            line-height: 1.4;
        }
        .article-content-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-top: 34px;
            margin-bottom: 14px;
            color: #F0F4FF;
        }
        .article-content-body p {
            margin-bottom: 24px;
        }
        .article-content-body img {
            border-radius: 14px;
            margin: 28px 0;
            width: auto;
            max-width: 100%;
            height: auto;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .article-content-body ul {
            margin: 20px 0 28px;
            padding-left: 6px;
            list-style: none;
        }
        .article-content-body ul li {
            padding: 8px 0 8px 28px;
            position: relative;
        }
        .article-content-body ul li::before {
            content: '';
            position: absolute;
            left: 2px;
            top: 18px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #29E6FF;
            box-shadow: 0 0 10px rgba(41, 230, 255, 0.7);
        }
        .article-content-body ol {
            padding-left: 24px;
            margin: 20px 0 28px;
        }
        .article-content-body ol li {
            padding: 6px 0;
        }
        .article-content-body blockquote {
            background: rgba(79, 125, 255, 0.1);
            border-left: 4px solid #4F7DFF;
            border-radius: 0 14px 14px 0;
            padding: 20px 24px;
            margin: 28px 0;
            color: #C9D8F5;
            font-style: italic;
        }
        .article-content-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 26px 0;
            font-size: 0.95rem;
            border-radius: 12px;
            overflow: hidden;
        }
        .article-content-body table th {
            background: rgba(79, 125, 255, 0.2);
            padding: 12px 16px;
            text-align: left;
            border: 1px solid rgba(255, 255, 255, 0.1);
            font-weight: 700;
            color: #EAF0FF;
        }
        .article-content-body table td {
            padding: 11px 16px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            background: rgba(255, 255, 255, 0.02);
        }
        .article-content-body hr {
            border: none;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin: 30px 0;
        }
        .article-content-body a {
            color: #29E6FF;
            text-decoration: underline;
            text-underline-offset: 4px;
        }
        .article-content-body a:hover {
            color: #fff;
        }
        .not-found-body {
            text-align: center;
            padding: 70px 30px;
        }
        .not-found-body i {
            font-size: 3rem;
            color: #4F7DFF;
            margin-bottom: 20px;
            opacity: 0.5;
        }
        .not-found-body h2 {
            font-size: 1.5rem;
            margin-bottom: 12px;
            color: #EAF0FF;
        }
        .not-found-body p {
            color: var(--text-sub);
            margin-bottom: 28px;
        }
        .back-home-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            border: 1px solid rgba(41, 230, 255, 0.4);
            color: #29E6FF;
            padding: 11px 26px;
            border-radius: 10px;
            font-weight: 600;
            transition: all .3s;
        }
        .back-home-btn:hover {
            background: rgba(41, 230, 255, 0.1);
            box-shadow: 0 0 20px rgba(41, 230, 255, 0.2);
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
            position: sticky;
            top: 100px;
        }
        .sidebar-box {
            background: rgba(13, 23, 48, 0.65);
            border: 1px solid var(--glass-border);
            border-radius: 16px;
            padding: 26px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .sidebar-box h4 {
            font-size: 1rem;
            color: #fff;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-box h4 i {
            color: #29E6FF;
        }
        .sidebar-box ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-box ul li {
            display: block;
        }
        .sidebar-box ul li:last-child {
            border-bottom: none;
        }
        .sidebar-box ul li:not(:last-child) {
            border-bottom: 1px dashed rgba(255, 255, 255, 0.07);
        }
        .sidebar-box ul li a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 12px 4px;
            color: #B3C1E2;
            font-size: 0.9rem;
            line-height: 1.5;
            transition: all .2s;
            border-radius: 6px;
        }
        .sidebar-box ul li a:hover {
            color: #29E6FF;
            padding-left: 10px;
            background: rgba(255, 255, 255, 0.02);
        }
        .sidebar-box ul li a i {
            font-size: 0.65rem;
            color: #6A7DA3;
            margin-top: 6px;
        }

        .tag-post-footer {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 24px;
            margin-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .article-tag {
            background: rgba(79, 125, 255, 0.12);
            border: 1px solid rgba(79, 125, 255, 0.3);
            color: #A9C4FF;
            display: inline-block;
            padding: 5px 15px;
            border-radius: 40px;
            font-size: 0.82rem;
            font-weight: 500;
        }
        .article-tag:hover {
            background: rgba(41, 230, 255, 0.15);
            border-color: rgba(41, 230, 255, 0.4);
            color: #29E6FF;
        }
        .prev-next-nav {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-top: 34px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            flex-wrap: wrap;
        }
        .prev-next-nav a {
            color: var(--text-sub);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            transition: color .2s;
        }
        .prev-next-nav a:hover {
            color: #29E6FF;
        }

        .related-card {
            margin-top: 50px;
        }
        .related-card h3 {
            color: #F0F4FF;
            margin-bottom: 22px;
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.35rem;
        }
        .related-card h3 i {
            color: #29E6FF;
            font-size: 1rem;
        }
        .related-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .side-card-item {
            background: rgba(13, 23, 48, 0.55);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 14px;
            overflow: hidden;
            display: block;
            transition: all .3s ease;
            height: 100%;
        }
        .side-card-item:hover {
            transform: translateY(-4px);
            border-color: rgba(41, 230, 255, 0.5);
            box-shadow: 0 10px 30px -8px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(41, 230, 255, 0.1);
        }
        .side-card-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
        }
        .side-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s;
        }
        .side-card-item:hover .side-card-img img {
            transform: scale(1.05);
        }
        .side-card-info {
            padding: 18px;
        }
        .side-card-info h4 {
            color: #F0F4FF;
            font-size: 0.95rem;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .side-card-date {
            color: var(--text-light);
            font-size: 0.8rem;
        }

        .site-footer {
            background: #080E20;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            padding-top: 66px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 44px;
            padding-bottom: 46px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
        }
        .footer-brand .brand-logo {
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-tagline {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.75;
            max-width: 330px;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #D6E0F5;
            margin-bottom: 20px;
            letter-spacing: .02em;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li a {
            display: block;
            padding: 5px 0;
            font-size: 0.86rem;
            color: var(--text-light);
            transition: color .2s;
        }
        .footer-col ul li a:hover {
            color: #29E6FF;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 24px 0 30px;
            font-size: 0.8rem;
            color: #55678A;
        }
        .footer-bottom .legal {
            color: #4E5F80;
        }

        @media (max-width:1024px) {
            .article-layout {
                grid-template-columns: minmax(0, 1fr);
            }
            .article-sidebar {
                order: 3;
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .sidebar-box {
                flex: 1;
                min-width: 240px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 40px 32px;
            }
            .related-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width:768px) {
            .nav-shell {
                padding: 0 16px;
                height: 64px;
                gap: 14px;
            }
            .main-nav {
                display: none;
            }
            .btn-sm {
                display: none;
            }
            .burger-btn {
                display: flex;
                margin-left: auto;
            }
            .article-hero {
                padding-top: 120px;
                padding-bottom: 32px;
            }
            .article-hero h1 {
                font-size: 1.55rem;
                line-height: 1.4;
            }
            .article-meta-row {
                gap: 8px 16px;
                font-size: 0.82rem;
            }
            .article-body-card {
                padding: 28px 22px;
            }
            .article-main {
                padding: 40px 0 70px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width:640px) {
            .article-body-card {
                padding: 22px 18px;
                border-radius: 14px;
            }
            .article-meta-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .related-card-grid {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                flex-direction: column;
            }
        }

        @media (max-width: 720px) {
            .container-x {
                padding-left: 18px;
                padding-right: 18px;
            }
        }

/* roulang page: category3 */
:root {
  --bg-base: #060D1F;
  --bg-soft: #0A1226;
  --bg-panel: #0D1730;
  --brand: #4F7DFF;
  --brand-glow: #29E6FF;
  --accent: #F5B848;
  --text-main: #F0F4FF;
  --text-sub: #A9B8D8;
  --text-light: #6A7DA3;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --glass-highlight: rgba(255,255,255,0.10);
  --glow-border: rgba(41,230,255,0.45);
  --radius-card: 18px;
  --radius-btn: 10px;
  --radius-small: 12px;
  --shadow-glow: 0 0 0 1px rgba(41,230,255,0.2), 0 10px 40px -8px rgba(41,230,255,0.25);
  --font-sans: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { background: var(--bg-base); color: var(--text-main); font-family: var(--font-sans); line-height: 1.7; overflow-x: hidden; }
body::before { content:""; position: fixed; inset: 0; z-index: 0; pointer-events: none; background: radial-gradient(circle at 60% 10%, rgba(79,125,255,0.15), transparent 45%), radial-gradient(circle at 15% 55%, rgba(41,230,255,0.06), transparent 35%); }
body::after { content:""; position: fixed; inset: 0; z-index: 0; pointer-events: none; background-image: linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px); background-size: 44px 44px; mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.6), transparent 85%); }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid rgba(41,230,255,0.7); outline-offset: 2px; }
.container-x { position: relative; z-index: 2; max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; height: 72px; border-bottom: 1px solid rgba(255,255,255,0.08); background: rgba(6,13,31,0.55); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); transition: background .3s, box-shadow .3s; }
.site-header.scrolled { background: rgba(6,13,31,0.92); box-shadow: 0 10px 30px rgba(0,0,0,0.25); }
.nav-shell { max-width: 1280px; height: 72px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand-logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; color: var(--text-main); white-space: nowrap; }
.brand-logo .logo-mark { width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(145deg, var(--brand), var(--brand-glow)); box-shadow: 0 0 16px rgba(41,230,255,0.5); position: relative; flex-shrink: 0; }
.brand-logo .logo-mark::before { content:""; position: absolute; inset: 5px; border-radius: 4px; background: var(--bg-base); opacity: 0.8; }
.brand-logo .logo-mark::after { content:""; position: absolute; inset: 0; border-radius: 8px; border: 1px solid rgba(255,255,255,0.25); }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a { padding: 8px 14px; border-radius: 10px; font-size: 0.9rem; color: var(--text-sub); line-height: 1.4; transition: all .2s; font-weight: 500; }
.main-nav a:hover { color: var(--text-main); background: rgba(255,255,255,0.08); }
.main-nav a.active { color: var(--text-main); background: rgba(79,125,255,0.75); }
.nav-cta .btn { display: inline-flex; align-items: center; gap: 6px; }
.nav-cta .btn svg { transition: transform .2s; }
.nav-cta .btn:hover svg { transform: translateX(3px); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 22px; border-radius: var(--radius-btn); font-weight: 600; font-size: 0.95rem; cursor: pointer; border: none; transition: all .2s ease; background: #3B7BFF; color: #fff; box-shadow: 0 0 0 1px rgba(41,230,255,0.2), 0 6px 24px -8px rgba(41,230,255,0.4); }
.btn:hover { background: linear-gradient(145deg, #378CFF, #29E6FF); box-shadow: 0 0 0 1px rgba(41,230,255,0.4), 0 10px 36px -8px rgba(41,230,255,0.45); transform: translateY(-1px); }
.btn:active { transform: scale(0.97); }
.btn-outline { display: inline-flex; background: transparent; border: 1px solid rgba(255,255,255,0.28); color: var(--text-main); box-shadow: none; }
.btn-outline:hover { background: rgba(255,255,255,0.09); border-color: rgba(41,230,255,0.6); box-shadow: 0 0 20px rgba(41,230,255,0.08); }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; border-radius: 9px; }
.burger-btn { display: none; background: transparent; border: 1px solid rgba(255,255,255,0.16); width: 42px; height: 42px; border-radius: 10px; color: var(--text-main); align-items: center; justify-content: center; }
.hero { position: relative; min-height: 46vh; display: flex; align-items: center; padding: 130px 0 70px; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6,13,31,0.9) 0%, rgba(6,13,31,0.7) 60%, rgba(6,13,31,0.55) 100%), rgba(0,0,0,0.25); }
.hero::after { content: ""; position: absolute; bottom: -1px; left: 0; right: 0; height: 100px; background: linear-gradient(to top, var(--bg-base), transparent); }
.breadcrumb { position: relative; z-index: 2; margin-bottom: 12px; font-size: 0.85rem; color: var(--text-sub); display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.breadcrumb span { color: var(--text-light); }
.breadcrumb a:hover { color: var(--text-main); }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; background: rgba(79,125,255,0.14); border: 1px solid rgba(79,125,255,0.35); color: var(--brand-glow); border-radius: 999px; font-size: 0.78rem; font-weight: 500; letter-spacing: 0.02em; margin-bottom: 14px; }
.chip-amber { background: rgba(245,184,72,0.1); border-color: rgba(245,184,72,0.35); color: var(--accent); }
.grid-card { border-radius: var(--radius-card); padding: 26px; position: relative; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08); transition: all .3s ease; }
.grid-card::after { content:""; position: absolute; top: 10px; left: 16px; right: 70%; height: 1px; background: linear-gradient(90deg, rgba(255,255,255,0.4), transparent); }
.grid-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-glow); background: rgba(255,255,255,0.08); border-color: var(--glow-border); }
.sec-title { font-size: clamp(1.6rem, 3vw, 2.35rem); font-weight: 700; line-height: 1.35; margin-bottom: 12px; color: var(--text-main); letter-spacing: -0.02em; }
.sec-sub { font-size: 1.05rem; color: var(--text-sub); max-width: 720px; line-height: 1.8; }
.stat-number { font-size: clamp(2.2rem, 4vw, 3.2rem); font-weight: 800; line-height: 1.1; color: var(--text-main); font-feature-settings: "tnum"; }
.stat-number .unit { color: var(--brand-glow); font-size: 0.5em; margin-left: 4px; }
.section-pad { padding: 90px 0; position: relative; z-index: 2; }
.bg-soft { background: var(--bg-soft); }
.solution-line { display: flex; align-items: flex-start; gap: 12px; padding: 12px 0; border-bottom: 1px dashed rgba(255,255,255,0.12); color: var(--text-sub); font-size: 0.96rem; }
.solution-line:last-child { border-bottom: none; }
.solution-line i { color: var(--brand-glow); font-size: 0.9rem; line-height: 1.7; }
.faq-item { border-bottom: 1px solid rgba(255,255,255,0.12); }
.faq-item:last-child { border-bottom: 1px solid transparent; }
.faq-item summary { display: flex; justify-content: space-between; align-items: center; cursor: pointer; list-style: none; font-size: 1.1rem; color: var(--text-main); padding: 24px 6px; font-weight: 550; transition: color .2s; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .icon { width: 36px; height: 36px; border-radius: 50%; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; background: rgba(79,125,255,0.15); border: 1px solid rgba(79,125,255,0.25); color: var(--brand-glow); transition: transform .3s ease; font-size: 0.9rem; }
.faq-item[open] summary .icon { transform: rotate(45deg); }
.faq-item[open] summary { color: var(--brand-glow); }
.faq-body { padding: 0 30px 26px 6px; color: var(--text-sub); line-height: 1.85; }
.cta-panel { border-radius: 24px; background: linear-gradient(145deg, rgba(79,125,255,0.2), rgba(10,18,38,0.9)), radial-gradient(circle at 80% 30%, rgba(41,230,255,0.14), transparent 45%); border: 1px solid rgba(41,230,255,0.23); box-shadow: 0 30px 60px -25px rgba(41,230,255,0.35); overflow: hidden; }
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field-label { font-size: 0.82rem; color: var(--text-sub); margin-bottom: 6px; display: block; }
.field { width: 100%; background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.15); border-radius: 12px; padding: 12px 15px; color: var(--text-main); font-size: 0.95rem; transition: border .2s, box-shadow .2s; }
.field:focus { outline: none; border-color: var(--brand-glow); box-shadow: 0 0 0 2px var(--glow-border); }
select.field option { background: var(--bg-panel); color: var(--text-main); }
.btn-accent { background: #F5B848; color: #060D1F; box-shadow: 0 6px 24px -10px rgba(245,184,72,0.8); font-size: .95rem; }
.btn-accent:hover { background: #f6cf7b; transform: scale(1.02); box-shadow: none; }
.site-footer { position: relative; z-index: 2; background: rgba(10,18,38,0.85); border-top: 1px solid rgba(255,255,255,0.07); backdrop-filter: blur(12px); }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; padding: 60px 0 30px; gap: 30px 45px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .brand-logo { font-size: 1.25rem; }
.footer-tagline { margin: 22px 0 20px; color: var(--text-light); line-height: 1.85; font-size: 0.93rem; max-width: 300px; }
.footer-col h4 { color: var(--text-main); font-size: .92rem; margin-bottom: 12px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: .9rem; color: var(--text-light); transition: all .2s; line-height: 1.5; }
.footer-col a:hover { color: var(--brand-glow); padding-left: 5px; color: var(--brand-glow); }
.footer-bottom { padding: 25px 30px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px 30px; color: var(--text-light); font-size: 0.88rem; }
.legal { color: #5b6c8c; }
@media (max-width:1024px){
  .footer-top { grid-template-columns: 1fr 1fr; }
  .nav-shell { padding: 0 16px; }
}
@media (max-width: 820px) {
  .main-nav { display: none; }
  .burger-btn { display: inline-flex; }
  .nav-cta { display: none; }
  .main-nav.open { position: fixed; top: 72px; left: 0; right: 0; background: rgba(6,13,31,0.98); border-bottom: 1px solid rgba(255,255,255,0.1); display: flex; flex-direction: column; align-items: flex-start; gap: 2px; padding: 16px 25px 25px; backdrop-filter: blur(16px); z-index: 99; max-height: calc(100vh - 80px); overflow-y: auto; }
  .main-nav.open a { width: 100%; padding: 14px 12px; font-size: 1.1rem; border-radius: 12px; border-left: 2px solid transparent; }
  .main-nav.open a.active { background: rgba(79,125,255,0.18); border-left-color: var(--brand-glow); }
  .section-pad { padding: 65px 0; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 30px 20px; }
  .footer-bottom { flex-direction: column; text-align: left; }
}
@media (max-width: 640px) {
  .contact-form { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; padding-top: 50px; }
  .hero { padding-top: 120px; }
  .grid-card { padding: 22px; }
}
.animate-fade-in { animation: fadeIn 0.9s ease forwards; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: translateY(0); } }
.card-tag { position: absolute; top: 18px; right: 18px; z-index: 2; background: rgba(245,184,72,0.92); color: #0a1226; font-size: 0.75rem; padding: 4px 10px; border-radius: 999px; font-weight: 600; box-shadow: 0 4px 14px rgba(0,0,0,0.2); }
.hover-glow { transition: border-color .3s, box-shadow .3s; }
.hover-glow:hover { box-shadow: 0 10px 28px -14px rgba(41,230,255,0.6); }
.fa-star-rated { color: var(--accent); }
.accordion-arrow { transition: transform .3s ease; }
details[open] .accordion-arrow { transform: rotate(180deg); }
.img-stack-large { position: relative; min-height: 300px; border-radius: 18px; overflow: hidden; border: 1px solid rgba(255,255,255,0.1); box-shadow: 0 30px 60px -25px rgba(0,0,0,0.6); }
.imgfit { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
.hero-title { font-size: clamp(2.3rem, 4.5vw, 3.5rem); line-height: 1.2; margin-bottom: 0; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.sep-gradient { background: linear-gradient(90deg, transparent, rgba(41,230,255,0.4), transparent); height: 1px; width: 100%; margin: 32px 0; }

/* roulang page: category2 */
:root {
        --bg-base: #060D1F;
        --bg-soft: #0A1226;
        --bg-panel: #0D1730;
        --brand: #4F7DFF;
        --brand-glow: #29E6FF;
        --accent: #F5B848;
        --text-main: #F0F4FF;
        --text-sub: #A9B8D8;
        --text-light: #6A7DA3;
        --glass-bg: rgba(255,255,255,0.06);
        --glass-border: rgba(255,255,255,0.12);
        --glass-blur: rgba(10,18,38,0.92);
        --glow-border: rgba(41,230,255,0.45);
        --radius-card: 18px;
        --radius-btn: 10px;
        --shadow-glow: 0 0 0 1px rgba(41,230,255,.2), 0 10px 40px -10px rgba(41,230,255,.35);
        --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
        --font-num: Inter, Arial, sans-serif;
    }

    * {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        background: var(--bg-base);
        color: var(--text-main);
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.75;
        -webkit-font-smoothing: antialiased;
        background-image:
            radial-gradient(circle at 18% 0%, rgba(79,125,255,0.10) 0, rgba(79,125,255,0) 32rem),
            linear-gradient(rgba(255,255,255,0.018) 1px, transparent 1px),
            linear-gradient(90deg, rgba(255,255,255,0.018) 1px, transparent 1px);
        background-size: 100% 100%, 52px 52px, 52px 52px;
    }

    body.nav-open {
        overflow: hidden;
    }

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

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

    button,
    input,
    select,
    textarea {
        font: inherit;
    }

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

    .section-pad {
        padding: 5.5rem 0;
    }

    .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: .5rem;
        font-size: .8rem;
        font-weight: 600;
        letter-spacing: .14em;
        color: var(--accent);
        text-transform: uppercase;
    }

    .eyebrow::before {
        content: "";
        width: 22px;
        height: 2px;
        background: linear-gradient(90deg, #4F7DFF, #29E6FF);
        border-radius: 99px;
        display: block;
    }

    h1,
    h2,
    h3,
    h4,
    h5 {
        font-family: var(--font-sans);
        margin-top: 0;
        color: var(--text-main);
    }

    h1 {
        font-size: clamp(2rem, 4vw, 3.1rem);
        line-height: 1.18;
        font-weight: 800;
        margin-bottom: 1.2rem;
        letter-spacing: -0.02em;
    }

    h2 {
        font-size: clamp(1.55rem, 3vw, 2.3rem);
        font-weight: 700;
        line-height: 1.3;
        margin-bottom: .8rem;
    }

    h3 {
        font-size: 1.2rem;
        font-weight: 600;
        line-height: 1.4;
    }

    .text-sub {
        color: var(--text-sub);
    }

    .text-light {
        color: var(--text-light);
    }

    .section-head {
        max-width: 760px;
        margin-bottom: 2.6rem;
    }

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

    .section-head.center .eyebrow {
        justify-content: center;
    }

    .section-head .lead {
        font-size: 1.06rem;
        color: var(--text-sub);
        margin: 0;
    }

    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 80;
        height: 72px;
        display: flex;
        align-items: center;
        border-bottom: 1px solid rgba(255,255,255,0.08);
        background: rgba(6,13,31,0.20);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        transition: background .3s, box-shadow .3s, height .3s;
    }

    .site-header.scrolled {
        height: 64px;
        background: rgba(6,13,31,0.92);
        box-shadow: 0 12px 36px rgba(0,0,0,0.32);
    }

    .nav-shell {
        width: 100%;
        max-width: 1280px;
        margin: 0 auto;
        padding: 0 1.4rem;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1.5rem;
    }

    .brand-logo {
        display: inline-flex;
        align-items: center;
        gap: .55rem;
        min-height: 44px;
        font-size: 1.05rem;
        font-weight: 700;
        white-space: nowrap;
        letter-spacing: .02em;
        color: #fff;
    }

    .logo-mark {
        width: 10px;
        height: 10px;
        border-radius: 4px;
        background: linear-gradient(135deg, var(--brand), var(--brand-glow));
        box-shadow: 0 0 0 1px rgba(41,230,255,.45), 0 0 12px rgba(41,230,255,.7);
    }

    .main-nav {
        display: flex;
        align-items: center;
        gap: .2rem;
        margin-left: auto;
    }

    .main-nav a {
        display: inline-flex;
        align-items: center;
        min-height: 44px;
        padding: .45rem .82rem;
        border-radius: 10px;
        font-size: .9rem;
        font-weight: 500;
        color: var(--text-sub);
        transition: background .2s, color .2s;
    }

    .main-nav a:hover,
    .main-nav a.active {
        color: #fff;
        background: rgba(255,255,255,0.08);
    }

    .main-nav a.active {
        color: #fff;
        box-shadow: inset 0 0 0 1px rgba(41,230,255,0.18);
    }

    .nav-cta {
        display: flex;
        align-items: center;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: .5rem;
        min-height: 44px;
        padding: .55rem 1.2rem;
        border-radius: var(--radius-btn);
        border: 0;
        cursor: pointer;
        font-size: .9rem;
        font-weight: 600;
        line-height: 1.2;
        transition: transform .2s, box-shadow .2s, background .3s, border-color .2s;
        white-space: nowrap;
    }

    .btn-primary {
        background: #3B7BFF;
        color: #fff;
        box-shadow: 0 0 0 1px rgba(41,230,255,.28), 0 8px 30px -8px rgba(41,230,255,.5);
    }

    .btn-primary:hover {
        background: linear-gradient(135deg, #4F7DFF, #29E6FF);
        box-shadow: 0 0 0 1px rgba(41,230,255,.4), 0 10px 36px -8px rgba(41,230,255,.7);
        transform: translateY(-2px);
    }

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

    .btn-glass,
    .outline-btn {
        background: rgba(255,255,255,0.06);
        color: var(--text-main);
        border: 1px solid rgba(255,255,255,0.22);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
    }

    .btn-glass:hover,
    .outline-btn:hover {
        background: rgba(255,255,255,0.12);
        border-color: rgba(41,230,255,.45);
        color: #fff;
    }

    .btn-sm {
        min-height: 40px;
        padding: .4rem .9rem;
        font-size: .85rem;
    }

    .btn:focus-visible,
    .main-nav a:focus-visible,
    .burger-btn:focus-visible,
    a:focus-visible,
    summary:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible {
        outline: 2px solid var(--brand-glow);
        outline-offset: 3px;
    }

    .burger-btn {
        display: none;
        background: transparent;
        border: 0;
        color: #fff;
        height: 44px;
        width: 44px;
        padding: 0;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
        cursor: pointer;
    }

    .mobile-panel {
        position: fixed;
        top: 0;
        bottom: 0;
        right: 0;
        z-index: 100;
        width: min(83vw, 360px);
        transform: translateX(110%);
        background: rgba(6,13,31,.98);
        border-left: 1px solid rgba(255,255,255,.1);
        padding: 3.5rem 1.6rem 2rem;
        transition: transform .35s cubic-bezier(.22, 1, .36, 1);
        display: flex;
        flex-direction: column;
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        overflow-y: auto;
    }

    .mobile-panel.open {
        transform: translateX(0);
    }

    .mobile-panel .brand-logo {
        margin-bottom: 1.8rem;
    }

    .mobile-nav a {
        display: block;
        padding: .85rem .3rem;
        color: var(--text-sub);
        border-bottom: 1px solid rgba(255,255,255,.06);
        font-weight: 500;
    }

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

    .mobile-cta {
        margin-top: 2rem;
    }

    .mobile-close {
        position: absolute;
        top: 1.2rem;
        right: 1.2rem;
        width: 40px;
        height: 40px;
        border: 0;
        background: rgba(255,255,255,0.07);
        border-radius: 10px;
        color: var(--text-sub);
        cursor: pointer;
    }

    .menu-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        backdrop-filter: blur(3px);
        z-index: 90;
        opacity: 0;
        pointer-events: none;
        transition: opacity .25s;
    }

    body.nav-open .menu-overlay {
        opacity: 1;
        pointer-events: auto;
    }

    .page-hero {
        position: relative;
        min-height: 52vh;
        padding: 8.5rem 0 4.5rem;
        display: flex;
        align-items: center;
        overflow: hidden;
        background-position: center top;
        background-size: cover;
    }

    .page-hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(90deg, rgba(6,13,31,.86), rgba(6,13,31,.62));
        z-index: 1;
    }

    .page-hero::after {
        content: "";
        position: absolute;
        right: -12%;
        bottom: 20%;
        width: 540px;
        height: 540px;
        background: radial-gradient(circle, rgba(79,125,255,.14) 0%, rgba(41,230,255,.06) 45%, transparent 70%);
        z-index: 0;
        pointer-events: none;
    }

    .page-hero .container-x {
        position: relative;
        z-index: 3;
    }

    .hero-tag {
        display: inline-flex;
        align-items: center;
        gap: .5rem;
        background: rgba(255,255,255,0.08);
        border: 1px solid rgba(41,230,255,.28);
        padding: .28rem .8rem;
        border-radius: 99px;
        font-size: .8rem;
        color: var(--text-main);
        margin-bottom: 1.4rem;
    }

    .hero-sub {
        font-size: clamp(1.05rem, 1.5vw, 1.22rem);
        color: var(--text-sub);
        max-width: 720px;
        margin-bottom: 2rem;
    }

    .breadcrumb {
        font-size: .8rem;
        color: var(--text-sub);
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: .4rem;
        margin-bottom: 1.2rem;
        position: relative;
        z-index: 3;
    }

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

    .breadcrumb .sep {
        color: var(--text-light);
        margin: 0 .15rem;
    }

    .breadcrumb .current {
        color: var(--text-main);
    }

    .glass-card {
        position: relative;
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        border-radius: var(--radius-card);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        background-color: rgba(10, 18, 38, 0.92);
        transition: transform .25s, box-shadow .25s, border-color .25s, background .25s;
        padding: 1.5rem 1.4rem;
        overflow: hidden;
    }

    @supports (backdrop-filter: blur(14px)) {
        .glass-card {
            background: var(--glass-bg);
        }
    }

    .glass-card:hover {
        transform: translateY(-4px);
        border-color: var(--glow-border);
        box-shadow: 0 14px 36px -8px rgba(0,0,0,.4), 0 0 24px rgba(41,230,255,0.05);
    }

    .soft-card {
        background: rgba(255,255,255,0.035);
        border-radius: 14px;
        border: 1px solid rgba(255,255,255,.08);
    }

    .icon-box {
        width: 48px;
        height: 48px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(145deg, rgba(79,125,255,.28), rgba(41,230,255,.16));
        border: 1px solid rgba(79,125,255,.3);
        color: #fff;
        margin-bottom: 1rem;
        flex: 0 0 auto;
    }

    .icon-box.glow-icon {
        box-shadow: 0 0 20px rgba(41,230,255,.22);
    }

    .badge {
        display: inline-flex;
        align-items: center;
        gap: .3rem;
        background: rgba(245,184,72,.12);
        border: 1px solid rgba(245,184,72,.25);
        color: var(--accent);
        padding: .2rem .58rem;
        border-radius: 99px;
        font-size: .75rem;
        font-weight: 600;
        line-height: 1.4;
    }

    .linked-btn {
        display: inline-flex;
        align-items: center;
        gap: .4rem;
        color: var(--text-main);
        font-weight: 600;
        min-height: 40px;
        margin-top: .9rem;
        font-size: .9rem;
    }

    .linked-btn svg {
        transition: transform .2s;
    }

    .linked-btn:hover svg {
        transform: translateX(4px);
    }

    .feature-check {
        display: flex;
        align-items: flex-start;
        gap: .7rem;
        padding: .55rem 0;
        color: var(--text-sub);
    }

    .feature-check svg {
        color: var(--brand-glow);
        margin-top: .25rem;
        flex: 0 0 auto;
    }

    .cover-img-box {
        position: relative;
        border-radius: 16px;
        overflow: hidden;
        background: rgba(255,255,255,.03);
        height: 100%;
        min-height: 200px;
    }

    .cover-img-box img {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        border-radius: 16px;
    }

    .cover-img-box::after {
        content: "";
        position: absolute;
        inset: 0;
        border: 1px solid rgba(255,255,255,.12);
        border-radius: 16px;
        pointer-events: none;
    }

    .steps-wrap {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 1.2rem;
        counter-reset: step;
        position: relative;
    }

    .step-item {
        position: relative;
        padding: 1.4rem 1.2rem;
        border-radius: 16px;
        background: rgba(255,255,255,0.04);
        border: 1px solid rgba(255,255,255,0.1);
        transition: border-color .2s;
        min-height: 160px;
    }

    .step-item:hover {
        border-color: rgba(41,230,255,.35);
    }

    .step-item::before {
        counter-increment: step;
        content: "0" counter(step);
        font-family: var(--font-num);
        font-variant-numeric: tabular-nums;
        font-size: .82rem;
        font-weight: 700;
        color: var(--brand-glow);
        display: block;
        margin-bottom: .6rem;
    }

    .step-item h3 {
        font-size: 1rem;
        margin-bottom: .3rem;
    }

    .step-item p {
        margin: 0;
        font-size: .88rem;
        color: var(--text-sub);
        line-height: 1.65;
    }

    .info-list {
        margin: 0;
        padding: 0;
        list-style: none;
    }

    .info-list li {
        display: flex;
        gap: .8rem;
        padding: .55rem 0;
        align-items: flex-start;
        color: var(--text-sub);
        border-bottom: 1px solid rgba(255,255,255,.06);
    }

    .info-list li:last-child {
        border-bottom: 0;
    }

    .info-list li svg {
        color: var(--brand-glow);
        margin-top: .35rem;
        flex: 0 0 auto;
    }

    .faq-item {
        background: rgba(255,255,255,0.05);
        border: 1px solid rgba(255,255,255,.09);
        border-radius: 16px;
        margin-bottom: .8rem;
        transition: border-color .2s;
    }

    .faq-item details {
        border-radius: 16px;
    }

    .faq-item summary {
        list-style: none;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1rem;
        padding: 1.1rem 1.25rem;
        font-weight: 600;
        color: var(--text-main);
        border-radius: 16px;
    }

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

    .faq-item summary ion-chevron {
        transition: transform .3s;
    }

    .faq-item details[open] summary {
        border-bottom: 1px solid rgba(255,255,255,.06);
    }

    .faq-item details[open] .faq-arrow {
        transform: rotate(45deg);
    }

    .faq-plus {
        width: 28px;
        height: 28px;
        flex: 0 0 auto;
        border-radius: 8px;
        border: 1px solid rgba(41,230,255,.3);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        position: relative;
        color: var(--brand-glow);
    }

    .faq-plus::before,
    .faq-plus::after {
        content: "";
        position: absolute;
        background: currentColor;
        border-radius: 2px;
        width: 11px;
        height: 2px;
    }

    .faq-plus::after {
        width: 2px;
        height: 11px;
        transition: transform .25s;
    }

    .faq-item details[open] .faq-plus::after {
        transform: scale(0);
    }

    .faq-body {
        padding: .2rem 1.25rem 1.25rem;
        color: var(--text-sub);
        line-height: 1.85;
    }

    .cta-panel {
        position: relative;
        border-radius: 24px;
        padding: 3rem 2.2rem;
        background: rgba(13,23,48,.86);
        border: 1px solid rgba(79,125,255,.32);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        background-image: radial-gradient(circle at 76% 20%, rgba(41,230,255,.13), transparent 16rem), radial-gradient(circle at 10% 90%, rgba(79,125,255,.16), transparent 15rem);
        overflow: hidden;
    }

    .form-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1rem;
    }

    .form-field label {
        display: block;
        font-size: .82rem;
        font-weight: 600;
        color: var(--text-sub);
        margin-bottom: .4rem;
        letter-spacing: .04em;
    }

    .form-field input,
    .form-field select,
    .form-field textarea {
        width: 100%;
        border-radius: 12px;
        background: rgba(255,255,255,0.06);
        border: 1px solid rgba(255,255,255,.14);
        color: var(--text-main);
        padding: .75rem 1rem;
        transition: border-color .2s, background .2s;
        appearance: none;
    }

    .form-field input,
    .form-field select {
        min-height: 48px;
    }

    .form-field textarea {
        resize: vertical;
        min-height: 96px;
    }

    .form-field input::placeholder,
    .form-field textarea::placeholder {
        color: var(--text-light);
    }

    .form-field input:focus,
    .form-field select:focus,
    .form-field textarea:focus {
        outline: none;
        background: rgba(255,255,255,.09);
        border-color: var(--brand-glow);
    }

    .site-footer {
        border-top: 1px solid rgba(255,255,255,.08);
        background: rgba(4,9,20,0.6);
        padding-top: 3.5rem;
        padding-bottom: 1.4rem;
    }

    .footer-top {
        display: grid;
        grid-template-columns: 1.5fr 1fr 1fr 1fr;
        gap: 2.4rem;
        margin-bottom: 2.8rem;
    }

    .footer-brand p {
        color: var(--text-sub);
        font-size: .95rem;
        margin: 1.2rem 0 0;
        max-width: 325px;
        line-height: 1.75;
    }

    .footer-col h4 {
        font-size: .95rem;
        font-weight: 600;
        margin-bottom: 1rem;
        color: #fff;
    }

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

    .footer-col li {
        margin-bottom: .55rem;
    }

    .footer-col a {
        color: var(--text-sub);
        min-height: 36px;
        display: inline-block;
        line-height: 1.6;
        font-size: .9rem;
        transition: color .2s;
    }

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

    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,.06);
        padding-top: 1.3rem;
        display: flex;
        flex-wrap: wrap;
        gap: .8rem 1.6rem;
        color: var(--text-light);
        font-size: .8rem;
        align-items: center;
    }

    .footer-bottom .copyright {
        color: var(--text-sub);
    }

    .hollow-dotted {
        border: 1px dashed rgba(255,255,255,.15);
        border-radius: 14px;
        text-align: center;
    }

    @media (max-width: 1024px) {
        .main-nav {
            display: none;
        }
        .nav-cta {
            display: none;
        }
        .burger-btn {
            display: inline-flex;
        }
        .footer-top {
            grid-template-columns: 1fr 1fr;
            gap: 2rem 1.4rem;
        }
    }

    @media (max-width: 768px) {
        .section-pad {
            padding: 3.6rem 0;
        }
        .page-hero {
            min-height: 48vh;
            padding: 7rem 0 3.2rem;
        }
        h1 {
            font-size: clamp(1.65rem, 6vw, 2.3rem);
        }
        h2 {
            font-size: clamp(1.4rem, 4vw, 1.85rem);
        }
        .steps-wrap {
            grid-template-columns: repeat(2, 1fr);
        }
        .form-grid {
            grid-template-columns: 1fr;
        }
        .footer-top {
            grid-template-columns: 1fr;
        }
        .cta-panel {
            padding: 2rem 1.2rem;
        }
        .step-item {
            min-height: auto;
        }
    }

    @media (max-width: 520px) {
        .steps-wrap {
            grid-template-columns: 1fr;
        }
        .nav-shell {
            padding: 0 .9rem;
        }
        .brand-logo {
            font-size: .92rem;
        }
        .container-x {
            padding-left: 1rem;
            padding-right: 1rem;
        }
    }

    .animate-fade-up {
        opacity: 0;
        transform: translateY(16px);
        animation: fadeUp .5s ease forwards;
    }

    .delay-1 {
        animation-delay: .08s;
    }
    .delay-2 {
        animation-delay: .16s;
    }
    .delay-3 {
        animation-delay: .24s;
    }

    @keyframes fadeUp {
        from {
            opacity: 0;
            transform: translateY(16px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .footnote {
        font-size: .78rem;
        color: var(--text-light);
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .footnote a {
        color: var(--text-sub);
    }

/* roulang page: category4 */
:root {
  --bg-base:#060D1F;
  --bg-soft:#0A1226;
  --bg-panel:#0D1730;
  --brand:#4F7DFF;
  --brand-deep:#3B7BFF;
  --brand-glow:#29E6FF;
  --accent:#F5B848;
  --text-main:#F0F4FF;
  --text-sub:#A9B8D8;
  --text-light:#6A7DA3;
  --glass-bg:rgba(255,255,255,0.06);
  --glass-border:rgba(255,255,255,0.12);
  --glass-hover:rgba(255,255,255,0.10);
  --radius-card:18px;
  --radius-btn:10px;
  --shadow-glow:0 0 0 1px rgba(41,230,255,.18), 0 10px 44px -12px rgba(41,230,255,.32);
  --font-main:"Noto Sans SC","PingFang SC","Microsoft YaHei","Inter",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg-base);
  color:var(--text-main);
  font-family:var(--font-main);
  font-size:16px;
  line-height:1.7;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  background:
    radial-gradient(circle at 72% 12%, rgba(79,125,255,.14), transparent 30%),
    radial-gradient(circle at 8% 78%, rgba(41,230,255,.07), transparent 26%),
    var(--bg-base);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size:72px 72px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button,input,textarea{font-family:var(--font-main)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand-glow);
  outline-offset:2px;
}

.container-x{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}

.site-header{
  position:fixed;
  width:100%;
  top:0;
  left:0;
  z-index:1000;
  background:rgba(6,13,31,.52);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:background .35s ease,box-shadow .35s ease;
}
.site-header.scrolled{
  background:rgba(6,13,31,.94);
  box-shadow:0 8px 30px -12px rgba(0,0,0,.45);
}
.nav-shell{
  max-width:1260px;
  margin:0 auto;
  padding:0 24px;
  height:72px;
  display:flex;
  align-items:center;
  gap:10px;
}
.brand-logo{
  display:inline-flex;
  align-items:center;
  gap:11px;
  font-size:1.08rem;
  font-weight:700;
  color:#fff;
  letter-spacing:.01em;
  white-space:nowrap;
}
.logo-mark{
  position:relative;
  width:10px;
  height:24px;
  border-radius:5px;
  background:linear-gradient(180deg,var(--brand) 0%,var(--brand-glow) 100%);
  box-shadow:0 0 18px rgba(41,230,255,.6);
}
.logo-mark::after{
  content:"";
  position:absolute;
  top:4px;
  left:4px;
  width:4px;
  height:8px;
  border-radius:4px;
  background:rgba(255,255,255,.65);
}
.main-nav{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:12px;
}
.main-nav a{
  position:relative;
  color:var(--text-sub);
  padding:8px 13px;
  border-radius:10px;
  font-size:.875rem;
  font-weight:500;
  transition:background .25s ease,color .25s ease;
}
.main-nav a:hover{
  background:rgba(255,255,255,.07);
  color:#fff;
}
.main-nav a.active{
  background:rgba(79,125,255,.18);
  color:#fff;
}
.main-nav a.active::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:3px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-glow));
  box-shadow:0 0 8px rgba(41,230,255,.7);
}
.nav-cta{
  margin-left:auto;
  display:flex;
  align-items:center;
}
.burger-btn{
  display:none;
  margin-left:auto;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.06);
  width:42px;
  height:42px;
  border-radius:12px;
  color:#fff;
  align-items:center;
  justify-content:center;
  transition:background .2s ease,border-color .2s ease;
}
.burger-btn:hover{
  background:rgba(255,255,255,.11);
  border-color:rgba(41,230,255,.35);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:10px;
  font-weight:600;
  font-size:.9rem;
  line-height:1;
  padding:12px 22px;
  border:0;
  cursor:pointer;
  transition:transform .22s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease;
  letter-spacing:.01em;
}
.btn:active{
  transform:scale(.97);
}
.btn-sm{padding:10px 18px;font-size:.85rem}
.btn-primary{
  background:var(--brand-deep);
  color:#fff;
  box-shadow:0 0 0 1px rgba(41,230,255,.16),0 8px 30px -8px rgba(41,230,255,.4);
}
.btn-primary:hover{
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-glow) 100%);
  box-shadow:0 0 0 1px rgba(41,230,255,.3),0 10px 34px -6px rgba(41,230,255,.5);
}
.btn-outline{
  background:rgba(255,255,255,.05);
  color:var(--text-main);
  border:1px solid rgba(255,255,255,.22);
  box-shadow:none;
}
.btn-outline:hover{
  background:rgba(255,255,255,.1);
  border-color:rgba(41,230,255,.55);
  box-shadow:var(--shadow-glow);
}
.btn[href="#contact"]{padding-left:24px;padding-right:24px}

.cat-hero{
  position:relative;
  min-height:620px;
  display:flex;
  align-items:center;
  overflow:hidden;
  padding:130px 0 70px;
}
.cat-hero-bg{
  position:absolute;
  inset:0;
  z-index:0;
  overflow:hidden;
}
.cat-hero-bg img{
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.45;
  transform:scale(1.04);
}
.cat-hero-bg::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,rgba(6,13,31,.96) 0%,rgba(6,13,31,.88) 48%,rgba(6,13,31,.64) 100%),
    linear-gradient(0deg,#060D1F 0%,rgba(6,13,31,.1) 34%,rgba(6,13,31,.2) 100%);
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  background:radial-gradient(circle at 72% 48%,rgba(41,230,255,.16),transparent 26%);
}
.cat-hero-inner{
  position:relative;
  z-index:2;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:.8rem;
  color:var(--text-light);
  margin-bottom:32px;
}
.breadcrumb a{
  color:var(--text-sub);
  transition:color .2s ease;
}
.breadcrumb a:hover{color:var(--brand-glow)}
.breadcrumb span{color:var(--text-light)}
.breadcrumb [aria-current="page"]{color:var(--text-main)}

.hero-cat-grid{
  display:grid;
  grid-template-columns:minmax(0,1.22fr) minmax(320px,.78fr);
  gap:56px;
  align-items:center;
}
.hero-kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border:1px solid rgba(41,230,255,.28);
  background:rgba(41,230,255,.08);
  border-radius:100px;
  padding:5px 12px 5px 7px;
  font-size:.78rem;
  font-weight:500;
  color:var(--brand-glow);
  letter-spacing:.04em;
  margin-bottom:18px;
}
.hero-kicker::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--brand-glow);
  box-shadow:0 0 10px var(--brand-glow);
}
.hero-h1{
  font-size:clamp(1.9rem,4vw,3.2rem);
  line-height:1.14;
  font-weight:800;
  letter-spacing:.01em;
  color:#fff;
}
.hero-h1 em{
  font-style:normal;
  background:linear-gradient(120deg,var(--brand-glow),var(--brand) 90%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  margin-top:18px;
  font-size:clamp(1rem,1.4vw,1.2rem);
  font-weight:500;
  color:var(--accent);
  letter-spacing:.02em;
}
.hero-desc{
  margin-top:16px;
  color:var(--text-sub);
  font-size:.98rem;
  max-width:560px;
}
.hero-cta{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:30px;
}
.hero-flags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:28px;
}
.hero-flags span{
  border:1px solid rgba(255,255,255,.1);
  background:rgba(255,255,255,.045);
  color:var(--text-sub);
  padding:5px 12px;
  border-radius:100px;
  font-size:.8rem;
}
.hero-info-panel{
  border:1px solid rgba(255,255,255,.14);
  background:rgba(13,23,48,.75);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-radius:22px;
  padding:26px 24px;
  position:relative;
  overflow:hidden;
}
.hero-info-panel::before{
  content:"";
  position:absolute;
  top:-30px;
  right:-30px;
  width:140px;
  height:140px;
  border-radius:50%;
  background:radial-gradient(circle,#4F7DFF 0%,transparent 68%);
  opacity:.3;
}
.panel-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:.85rem;
  font-weight:600;
  color:#fff;
  border-bottom:1px solid rgba(255,255,255,.1);
  padding-bottom:14px;
  margin-bottom:16px;
}
.state-dot{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--brand-glow);
  font-size:.75rem;
}
.state-dot::before{
  content:"";
  width:7px;
  height:7px;
  border-radius:50%;
  background:#29E6FF;
  box-shadow:0 0 10px #29E6FF;
  animation:pulse 1.8s infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.5;transform:scale(.82)}
}
.info-line{
  display:flex;
  gap:12px;
  padding:12px 0;
  border-bottom:1px solid rgba(255,255,255,.07);
}
.info-line:last-child{border-bottom:0}
.info-ico{
  flex:0 0 34px;
  height:34px;
  border-radius:10px;
  background:rgba(79,125,255,.16);
  border:1px solid rgba(79,125,255,.3);
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
}
.info-ico svg{width:16px;height:16px}
.info-content strong{
  display:block;
  font-size:.88rem;
  color:#fff;
  font-weight:600;
}
.info-content p{
  color:var(--text-sub);
  font-size:.78rem;
  margin-top:2px;
  line-height:1.5;
}
.panel-foot{
  margin-top:16px;
  border-radius:12px;
  background:rgba(245,184,72,.1);
  border:1px solid rgba(245,184,72,.18);
  padding:11px 13px;
  color:#F4D9A8;
  font-size:.78rem;
  line-height:1.6;
}

.section-pad{
  padding:96px 0;
}
.section-pad-soft{
  background:linear-gradient(180deg,rgba(10,18,38,.9),rgba(6,13,31,.4));
}
.section-bordered{
  border-top:1px solid rgba(255,255,255,.06);
}
.section-head{
  max-width:760px;
  margin-bottom:52px;
}
.section-head.split{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:32px;
  max-width:none;
}
.section-tag{
  display:inline-block;
  color:var(--brand-glow);
  font-size:.78rem;
  font-weight:600;
  letter-spacing:.08em;
  border:1px solid rgba(41,230,255,.22);
  background:rgba(41,230,255,.06);
  padding:4px 12px;
  border-radius:100px;
  margin-bottom:16px;
}
.section-title{
  font-size:clamp(1.6rem,2.6vw,2.3rem);
  line-height:1.3;
  color:#fff;
  font-weight:700;
}
.section-head p{
  color:var(--text-sub);
  font-size:.96rem;
  margin-top:14px;
  max-width:680px;
}
.section-head .text-link{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--text-sub);
  border-bottom:1px solid rgba(169,184,216,.35);
  padding-bottom:4px;
  font-size:.88rem;
  transition:color .2s ease,border-color .2s ease;
}
.section-head .text-link svg{width:14px;height:14px}
.section-head .text-link:hover{color:var(--brand-glow);border-color:var(--brand-glow)}

.glass-card{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-card);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease,background .3s ease;
}

.about-grid{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);
  gap:24px;
}
.about-lead{
  padding:0;
  overflow:hidden;
  display:flex;
  flex-direction:column;
}
.about-lead-media{
  position:relative;
  height:210px;
  overflow:hidden;
  border-radius:18px 18px 0 0;
}
.about-lead-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .6s ease;
}
.about-lead:hover .about-lead-media img{transform:scale(1.05)}
.about-lead-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 30%,rgba(6,13,31,.65));
}
.about-lead-media .media-label{
  position:absolute;
  left:20px;
  bottom:14px;
  z-index:1;
  color:#fff;
  font-size:.84rem;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(6,13,31,.5);
  border-radius:100px;
  padding:3px 10px;
}
.about-lead-body{
  padding:28px;
}
.about-lead-body h3{
  font-size:1.28rem;
  color:#fff;
  line-height:1.45;
  font-weight:700;
  margin-bottom:14px;
}
.about-lead-body p{
  color:var(--text-sub);
  font-size:.94rem;
  letter-spacing:.01em;
}
.about-list{
  margin-top:20px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.about-list li{
  border:1px solid rgba(255,255,255,.1);
  background:rgba(255,255,255,.035);
  border-radius:12px;
  padding:12px 13px;
  display:flex;
  align-items:center;
  gap:9px;
  color:#DCE6FF;
  font-size:.84rem;
  transition:border-color .25s ease,background .25s ease;
}
.about-list li:hover{
  border-color:rgba(41,230,255,.35);
  background:rgba(41,230,255,.07);
}
.about-list svg{width:15px;height:15px;flex:0 0 auto;color:var(--brand-glow)}
.about-side{
  display:grid;
  grid-template-rows:1fr 1fr;
  gap:24px;
}
.about-mini-card{
  display:block;
  border-radius:18px;
  padding:26px 24px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  position:relative;
  overflow:hidden;
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.about-mini-card::after{
  content:"";
  position:absolute;
  right:-22px;
  top:-22px;
  width:90px;
  height:90px;
  background:radial-gradient(circle,rgba(79,125,255,.25),transparent 68%);
  opacity:.5;
  transition:opacity .3s ease;
}
.about-mini-card:hover{
  transform:translateY(-4px);
  border-color:rgba(41,230,255,.4);
  box-shadow:0 22px 48px -22px rgba(79,125,255,.55);
}
.about-mini-card:hover::after{opacity:.9}
.mini-icon{
  width:42px;
  height:42px;
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:linear-gradient(135deg,rgba(79,125,255,.2),rgba(41,230,255,.14));
  border:1px solid rgba(41,230,255,.2);
  color:#fff;
  margin-bottom:14px;
}
.mini-icon svg{width:20px;height:20px}
.about-mini-card h3{
  font-size:1.08rem;
  color:#fff;
  font-weight:600;
}
.about-mini-card p{
  color:var(--text-sub);
  font-size:.83rem;
  margin-top:6px;
  line-height:1.6;
}

.sticky-card{
  position:sticky;
  top:100px;
}

.guide-grid{
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);
  gap:24px;
}
.guide-lead{
  display:grid;
  grid-template-columns:.92fr 1.08fr;
  overflow:hidden;
  min-height:340px;
}
.guide-media{
  position:relative;
  min-height:260px;
}
.guide-media img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.guide-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(6,13,31,.34),transparent);
}
.guide-mark{
  position:absolute;
  left:16px;
  bottom:16px;
  z-index:2;
  color:#fff;
  font-size:.78rem;
  border-radius:8px;
  padding:6px 12px;
  backdrop-filter:blur(6px);
  background:rgba(6,13,31,.3);
  border:1px solid rgba(255,255,255,.2);
}
.guide-body{
  padding:30px 26px;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.guide-body .card-tag{
  display:inline-flex;
  width:fit-content;
  color:var(--accent);
  background:rgba(245,184,72,.08);
  border:1px solid rgba(245,184,72,.18);
  border-radius:100px;
  padding:3px 10px;
  font-size:.72rem;
  margin-bottom:12px;
}
.guide-body h3{
  color:#fff;
  font-size:1.32rem;
  line-height:1.5;
  font-weight:700;
}
.guide-body p{
  color:var(--text-sub);
  font-size:.9rem;
  margin-top:12px;
}
.guide-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:#fff;
  font-size:.85rem;
  margin-top:20px;
  width:fit-content;
  border-bottom:1px solid rgba(41,230,255,.45);
  padding-bottom:4px;
  transition:color .2s ease;
}
.guide-cta svg{width:14px;height:14px;color:var(--brand-glow)}
.guide-cta:hover{color:var(--brand-glow)}
.guide-side{
  display:grid;
  grid-template-rows:1fr 1fr;
  gap:24px;
}
.guide-card{
  display:flex;
  flex-direction:column;
  padding:24px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  border-radius:18px;
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease,background .3s ease;
}
.guide-card:hover{
  transform:translateY(-4px);
  border-color:rgba(41,230,255,.4);
  box-shadow:0 18px 40px -18px rgba(41,230,255,.4);
  background:rgba(41,230,255,.06);
}
.guide-card-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-bottom:12px;
}
.guide-card-top .arrow{
  color:var(--brand-glow);
  width:20px;
  height:20px;
  flex:0 0 auto;
  transition:transform .25s ease;
}
.guide-card:hover .arrow{transform:translateX(4px)}
.guide-card h3{
  color:#fff;
  font-size:1rem;
  font-weight:600;
  line-height:1.5;
}
.guide-card p{
  color:var(--text-sub);
  font-size:.82rem;
  line-height:1.65;
  flex:1;
}
.guide-card-tag{
  display:inline-flex;
  width:fit-content;
  margin-top:14px;
  color:var(--text-light);
  font-size:.73rem;
  border:1px solid rgba(255,255,255,.1);
  background:rgba(255,255,255,.04);
  border-radius:6px;
  padding:2px 8px;
}

.process-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
  counter-reset:step;
}
.process-step{
  position:relative;
  border-radius:18px;
  padding:26px 22px 24px;
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.09);
  transition:transform .3s ease,border-color .3s ease,background .3s ease,box-shadow .3s ease;
}
.process-step:hover{
  background:rgba(255,255,255,.08);
  border-color:rgba(41,230,255,.3);
  box-shadow:var(--shadow-glow);
  transform:translateY(-4px);
}
.process-num{
  width:40px;
  height:40px;
  border-radius:12px;
  background:rgba(79,125,255,.16);
  border:1px solid rgba(79,125,255,.32);
  color:var(--brand-glow);
  font-size:.92rem;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:16px;
  box-shadow:0 0 20px rgba(41,230,255,.1);
}
.process-step h3{
  color:#fff;
  font-size:1.08rem;
  font-weight:600;
  margin-bottom:8px;
}
.process-step p{
  color:var(--text-sub);
  font-size:.84rem;
  line-height:1.7;
}
.step-line{
  position:absolute;
  top:45px;
  left:66px;
  width:calc(100% - 12px);
  height:1px;
  background:linear-gradient(90deg,rgba(79,125,255,.55),rgba(79,125,255,.08));
}

.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.scene-card{
  display:block;
  border-radius:18px;
  overflow:hidden;
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.1);
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.scene-card:hover{
  transform:translateY(-4px);
  border-color:rgba(41,230,255,.4);
  box-shadow:0 22px 48px -22px rgba(79,125,255,.5);
}
.scene-img{
  height:172px;
  overflow:hidden;
  position:relative;
}
.scene-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .55s ease;
}
.scene-card:hover .scene-img img{transform:scale(1.06)}
.scene-img::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,13,31,0),rgba(6,13,31,.22));
}
.scene-body{
  padding:20px 20px 22px;
}
.scene-body .scene-tag{
  display:inline-flex;
  color:var(--brand-glow);
  font-size:.74rem;
  letter-spacing:.02em;
  margin-bottom:8px;
}
.scene-body h3{
  color:#fff;
  font-size:1.06rem;
  font-weight:600;
}
.scene-body p{
  color:var(--text-sub);
  font-size:.84rem;
  margin-top:8px;
  line-height:1.7;
}

.resource-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.resource-card{
  display:flex;
  flex-direction:column;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  border-radius:18px;
  overflow:hidden;
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease,background .3s ease;
}
.resource-card:hover{
  transform:translateY(-4px);
  background:rgba(255,255,255,.08);
  border-color:rgba(41,230,255,.4);
  box-shadow:var(--shadow-glow);
}
.resource-media{
  position:relative;
  height:148px;
  overflow:hidden;
}
.resource-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .55s ease;
}
.resource-card:hover .resource-media img{transform:scale(1.06)}
.resource-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent,rgba(6,13,31,.36));
}
.resource-body{
  padding:20px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.resource-body h3{
  font-size:1rem;
  color:#fff;
  font-weight:600;
}
.resource-body p{
  font-size:.82rem;
  color:var(--text-sub);
  margin-top:8px;
  line-height:1.6;
  flex:1;
}
.resource-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:16px;
  font-size:.8rem;
  color:var(--brand-glow);
  transition:color .2s ease;
}
.resource-link svg{width:14px;height:14px}
.resource-link:hover{color:#fff}

.faq-wrap{
  max-width:860px;
  margin:0 auto;
}
.faq-item{
  border-bottom:1px solid rgba(255,255,255,.1);
}
.faq-item + .faq-item{margin-top:0}
.faq-item details summary{
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  cursor:pointer;
  padding:26px 6px;
  color:#fff;
  font-size:1rem;
  font-weight:600;
  transition:color .2s ease;
}
.faq-item details summary::-webkit-details-marker{display:none}
.faq-item details summary:hover{
  color:var(--brand-glow);
}
.faq-icon{
  position:relative;
  flex:0 0 26px;
  width:26px;
  height:26px;
  border-radius:50%;
  border:1px solid rgba(41,230,255,.42);
  transition:transform .35s ease,border-color .25s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:rgba(41,230,255,.9);
  border-radius:2px;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:1.6px}
.faq-icon::after{width:1.6px;height:10px}
.faq-item details[open] .faq-icon{
  transform:rotate(135deg);
  border-color:rgba(245,184,72,.7);
}
.faq-item details[open] .faq-icon::before,.faq-item details[open] .faq-icon::after{
  background:var(--accent);
}
.faq-body{
  padding:0 30px 28px 6px;
  color:var(--text-sub);
  font-size:.9rem;
  line-height:1.9;
}
.faq-body a{
  color:var(--brand-glow);
  border-bottom:1px solid rgba(41,230,255,.3);
}
.faq-body a:hover{color:#fff;border-color:rgba(255,255,255,.5)}
.faq-note{
  margin-top:36px;
  text-align:center;
  color:var(--text-light);
  font-size:.82rem;
}
.faq-note a{
  color:var(--brand-glow);
  border-bottom:1px solid rgba(41,230,255,.3);
}
.faq-note a:hover{color:#fff}

.cta-section{
  padding:110px 0;
  background:rgba(13,23,48,.5);
  border-top:1px solid rgba(255,255,255,.07);
  border-bottom:1px solid rgba(255,255,255,.07);
  position:relative;
  overflow:hidden;
}
.cta-section::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 20% 20%,rgba(79,125,255,.16),transparent 36%),
    radial-gradient(circle at 82% 72%,rgba(41,230,255,.12),transparent 30%);
}
.cta-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:center;
}
.cta-copy h2{
  font-size:clamp(1.6rem,2.6vw,2.2rem);
  color:#fff;
  line-height:1.35;
  font-weight:700;
}
.cta-copy p{
  color:var(--text-sub);
  margin-top:18px;
  font-size:.95rem;
  max-width:520px;
}
.cta-tips{
  display:grid;
  gap:12px;
  margin-top:28px;
}
.cta-tips li{
  display:flex;
  align-items:center;
  gap:10px;
  color:#D8E2FB;
  font-size:.86rem;
}
.cta-tips svg{
  width:17px;
  height:17px;
  color:var(--brand-glow);
  flex:0 0 auto;
}
.contact-box{
  border:1px solid rgba(255,255,255,.14);
  background:rgba(10,18,38,.9);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-radius:22px;
  padding:34px 28px 28px;
}
.contact-title{
  font-size:1.16rem;
  color:#fff;
  font-weight:700;
}
.contact-title span{
  color:var(--brand-glow);
}
.contact-sub{
  color:var(--text-sub);
  font-size:.85rem;
  margin-top:6px;
  margin-bottom:24px;
}
.form-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
}
.form-grid .form-full{
  grid-column:1/-1;
}
.form-field label{
  display:block;
  font-size:.76rem;
  color:var(--text-light);
  margin-bottom:6px;
  font-weight:500;
}
.form-field input,.form-field textarea{
  width:100%;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.13);
  background:rgba(255,255,255,.05);
  padding:11px 14px;
  color:var(--text-main);
  font-size:.86rem;
  outline:none;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.form-field textarea{
  min-height:92px;
  resize:vertical;
}
.form-field input::placeholder,.form-field textarea::placeholder{
  color:rgba(169,184,216,.45);
}
.form-field input:focus,.form-field textarea:focus{
  border-color:rgba(41,230,255,.7);
  box-shadow:0 0 0 3px rgba(41,230,255,.12);
}
.form-field input:hover,.form-field textarea:hover{
  border-color:rgba(255,255,255,.26);
}
.form-submit{
  grid-column:1/-1;
  margin-top:6px;
}
.form-note{
  color:var(--text-light);
  font-size:.75rem;
  line-height:1.7;
  margin-top:14px;
}

.site-footer{
  background:linear-gradient(180deg,rgba(10,18,38,.7),rgba(6,13,31,.96));
  border-top:1px solid rgba(255,255,255,.08);
  padding-top:70px;
  margin-top:0;
}
.footer-top{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand-logo{
  font-size:1.06rem;
}
.footer-tagline{
  margin-top:16px;
  color:var(--text-sub);
  font-size:.85rem;
  line-height:1.8;
  max-width:360px;
}
.footer-col h4{
  font-size:.92rem;
  color:#fff;
  font-weight:600;
  margin-bottom:18px;
}
.footer-col ul li{
  margin-bottom:11px;
}
.footer-col a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--text-sub);
  font-size:.82rem;
  transition:color .2s ease,transform .2s ease;
}
.footer-col a::before{
  content:"";
  width:3px;
  height:3px;
  border-radius:50%;
  background:rgba(169,184,216,.7);
  transition:background .2s ease;
}
.footer-col a:hover{
  color:var(--brand-glow);
  transform:translateX(2px);
}
.footer-col a:hover::before{
  background:var(--brand-glow);
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 28px;
  padding:24px 24px;
  color:var(--text-light);
  font-size:.76rem;
  justify-content:space-between;
}
.footer-bottom .legal{
  color:var(--text-light);
  font-size:.74rem;
  opacity:.92;
}
.site-footer .container-x .footer-bottom{
  padding-left:0;
  padding-right:0;
}

@media (max-width:1024px){
  .footer-top{
    grid-template-columns:1fr 1fr 1fr;
  }
  .footer-brand{
    grid-column:1/-1;
  }
  .footer-tagline{
    max-width:620px;
  }
}
@media (max-width:992px){
  .about-grid,.guide-grid{
    grid-template-columns:1fr;
  }
  .guide-side{
    grid-template-columns:1fr;
    grid-template-rows:none;
  }
  .hero-cat-grid{
    grid-template-columns:1fr;
    gap:24px;
  }
  .hero-info-panel{
    max-width:580px;
  }
  .cta-grid{
    grid-template-columns:1fr;
    gap:44px;
  }
  .resource-grid{
    grid-template-columns:1fr;
    max-width:680px;
    margin-left:auto;
    margin-right:auto;
  }
}
@media (max-width:767px){
  .section-pad{
    padding:64px 0;
  }
  .about-grid,.guide-grid,.cta-grid{
    gap:20px;
  }
  .about-lead-media{
    height:170px;
  }
  .process-grid{
    grid-template-columns:1fr;
  }
  .scene-grid{
    grid-template-columns:1fr;
    gap:18px;
  }
  .guide-lead{
    grid-template-columns:1fr;
  }
  .guide-media{
    min-height:166px;
  }
  .guide-body{
    padding:24px;
  }
  .section-head.split{
    flex-direction:column;
    align-items:flex-start;
    gap:16px;
  }
  .form-grid{
    grid-template-columns:1fr;
  }
  .form-full{
    grid-column:auto;
  }
  .footer-top{
    grid-template-columns:1fr;
    gap:34px;
  }
  .footer-brand{
    grid-column:auto;
  }
  .footer-bottom{
    justify-content:flex-start;
    gap:10px;
    flex-direction:column;
    align-items:flex-start;
  }
}
@media (max-width:640px){
  .nav-shell{
    height:68px;
    padding:0 16px;
  }
  .nav-cta{
    display:none;
  }
  .burger-btn{
    display:inline-flex;
  }
  .main-nav{
    position:fixed;
    top:68px;
    left:0;
    right:0;
    z-index:999;
    flex-direction:column;
    align-items:stretch;
    background:rgba(6,13,31,.98);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    padding:20px;
    border-bottom:1px solid rgba(255,255,255,.1);
    transform:translateY(-14px);
    opacity:0;
    pointer-events:none;
    transition:all .3s ease;
  }
  .main-nav.open{
    opacity:1;
    transform:translateY(0);
    pointer-events:auto;
  }
  .main-nav a{
    padding:13px 16px;
    font-size:.95rem;
    border-radius:12px;
  }
  .main-nav a.active::after{
    left:16px;
    right:auto;
    width:28px;
    bottom:6px;
  }
  .cat-hero{
    min-height:600px;
    padding:110px 0 50px;
  }
  .breadcrumb{
    margin-bottom:22px;
  }
  .hero-cta .btn{
    flex:1;
  }
  .container-x{
    padding-left:18px;
    padding-right:18px;
  }
  .footer-bottom{
    flex-direction:column;
  }
  .site-footer{
    padding-top:52px;
  }
  .contact-box{
    padding:24px 18px;
  }
}
@media (min-width:641px) and (max-width:1023px){
  .main-nav a{
    padding:8px 8px;
    font-size:.79rem;
  }
  .nav-shell{
    gap:8px;
    padding:0 18px;
  }
  .brand-logo{
    font-size:1rem;
  }
  .nav-cta .btn-sm{
    font-size:.82rem;
    padding:9px 12px;
  }
}

/* roulang page: category1 */
:root{
  --bg-base:#060D1F;
  --bg-soft:#0A1226;
  --bg-panel:#0D1730;
  --brand:#4F7DFF;
  --brand-glow:#29E6FF;
  --accent:#F5B848;
  --text-main:#F0F4FF;
  --text-sub:#A9B8D8;
  --text-light:#6A7DA3;
  --glass-bg:rgba(255,255,255,0.06);
  --glass-bg-soft:rgba(255,255,255,0.045);
  --glass-border:rgba(255,255,255,0.12);
  --glass-border-soft:rgba(255,255,255,0.08);
  --glass-high:rgba(255,255,255,0.10);
  --radius-card:18px;
  --radius-sm:12px;
  --radius-btn:10px;
  --shadow-glow:0 0 0 1px rgba(41,230,255,.20), 0 10px 40px -10px rgba(41,230,255,.35);
  --shadow-card:0 18px 44px -22px rgba(3,8,22,.9);
  --font-cn:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-en:Inter,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.7;
  color:var(--text-main);
  background-color:var(--bg-base);
  background-image:
    radial-gradient(900px 520px at 78% -6%, rgba(79,125,255,.20), transparent 62%),
    radial-gradient(680px 460px at 8% 12%, rgba(41,230,255,.10), transparent 60%);
  background-repeat:no-repeat;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse at 50% 20%, #000 12%, transparent 78%);
  mask-image:radial-gradient(ellipse at 50% 20%, #000 12%, transparent 78%);
}
img{max-width:100%;display:block;border-radius:var(--radius-sm);}
a{color:inherit;text-decoration:none;transition:color .22s ease, background-color .22s ease, opacity .22s ease;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.28;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-glow);outline-offset:3px;border-radius:6px;}
::selection{background:rgba(41,230,255,.32);color:#fff;}

.container-x{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
  position:relative;
  z-index:1;
}
.section{padding:96px 0;position:relative;z-index:1;}
.section-tight{padding:72px 0;}
.section-alt{background:linear-gradient(180deg, rgba(10,18,38,0) 0%, rgba(10,18,38,.85) 18%, rgba(10,18,38,.85) 82%, rgba(10,18,38,0) 100%);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:.8rem;
  font-weight:500;
  letter-spacing:.08em;
  color:var(--brand-glow);
  text-transform:uppercase;
  font-family:var(--font-en);
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:linear-gradient(90deg,var(--brand),var(--brand-glow));
}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-title{
  font-size:clamp(1.6rem,3vw,2.4rem);
  font-weight:700;
  line-height:1.3;
  margin-top:14px;
  letter-spacing:.01em;
}
.sec-desc{
  margin-top:16px;
  color:var(--text-sub);
  font-size:16px;
  line-height:1.8;
}
.text-glow{color:var(--brand-glow);}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  min-height:44px;
  border-radius:var(--radius-btn);
  font-size:.95rem;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .24s ease, background .24s ease, border-color .24s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px) scale(.995);}
.btn-primary{
  background:#3B7BFF;
  color:#fff;
  box-shadow:0 0 0 1px rgba(41,230,255,.22), 0 12px 34px -12px rgba(41,230,255,.55);
}
.btn-primary:hover{
  background:linear-gradient(96deg,#4F7DFF 0%,#29E6FF 100%);
  box-shadow:0 0 0 1px rgba(41,230,255,.45), 0 16px 44px -12px rgba(41,230,255,.75);
}
.btn-ghost{
  background:rgba(255,255,255,.04);
  border-color:var(--glass-border);
  color:var(--text-main);
}
.btn-ghost:hover{
  background:rgba(255,255,255,.10);
  border-color:rgba(41,230,255,.42);
}
.btn-sm{padding:9px 18px;min-height:38px;font-size:.86rem;}
.btn-block{width:100%;}

/* 标签 */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:999px;
  font-size:.78rem;
  font-weight:500;
  color:var(--text-sub);
  background:rgba(255,255,255,.05);
  border:1px solid var(--glass-border-soft);
}
.tag-accent{color:var(--accent);border-color:rgba(245,184,72,.35);background:rgba(245,184,72,.08);}
.tag-cyan{color:var(--brand-glow);border-color:rgba(41,230,255,.32);background:rgba(41,230,255,.08);}

/* 导航 */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  transition:background .28s ease, box-shadow .28s ease, border-color .28s ease;
  border-bottom:1px solid rgba(255,255,255,.08);
  background:linear-gradient(180deg, rgba(3,8,20,.35), rgba(3,8,20,.05));
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.site-header.scrolled{
  background:rgba(6,13,31,.92);
  box-shadow:0 12px 30px -18px rgba(0,0,0,.9);
  border-bottom-color:rgba(255,255,255,.10);
}
.nav-shell{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  height:72px;
  display:flex;
  align-items:center;
  gap:26px;
}
.brand-logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:1.02rem;
  font-weight:700;
  color:#fff;
  letter-spacing:.01em;
  flex-shrink:0;
}
.logo-mark{
  width:26px;height:26px;
  border-radius:9px;
  background:linear-gradient(135deg,#4F7DFF,#29E6FF);
  box-shadow:0 0 18px rgba(41,230,255,.55);
  position:relative;
  flex-shrink:0;
}
.logo-mark::after{
  content:"";
  position:absolute;
  inset:7px;
  border-radius:3px;
  background:rgba(6,13,31,.85);
}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.main-nav a{
  display:inline-flex;
  align-items:center;
  padding:9px 14px;
  border-radius:8px;
  font-size:.9rem;
  color:var(--text-sub);
  font-weight:500;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.08);}
.main-nav a.active{
  color:#fff;
  background:rgba(41,230,255,.10);
  box-shadow:inset 0 0 0 1px rgba(41,230,255,.30);
}
.nav-cta{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.burger-btn{
  display:none;
  background:rgba(255,255,255,.05);
  border:1px solid var(--glass-border);
  border-radius:10px;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  color:#fff;
  cursor:pointer;
}
.mobile-menu{
  position:fixed;
  inset:72px 0 0 0;
  z-index:79;
  background:rgba(6,13,31,.96);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  padding:28px 24px 40px;
  display:none;
  flex-direction:column;
  gap:8px;
  overflow-y:auto;
}
.mobile-menu.open{display:flex;}
.mobile-menu a{
  padding:15px 16px;
  border-radius:12px;
  font-size:1rem;
  color:var(--text-sub);
  border:1px solid transparent;
}
.mobile-menu a:hover,.mobile-menu a.active{
  color:#fff;
  background:rgba(255,255,255,.06);
  border-color:var(--glass-border);
}

/* 分类 Hero */
.cat-hero{
  position:relative;
  min-height:480px;
  padding:150px 0 72px;
  display:flex;
  align-items:center;
  overflow:hidden;
  background-image:
    linear-gradient(180deg, rgba(6,13,31,.80) 0%, rgba(6,13,31,.72) 45%, rgba(6,13,31,.96) 100%),
    url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center right;
}
.cat-hero::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:160px;
  background:linear-gradient(180deg, rgba(6,13,31,0), var(--bg-base));
  pointer-events:none;
}
.cat-hero::before{
  content:"";
  position:absolute;
  top:-160px;right:-120px;
  width:620px;height:620px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(41,230,255,.30), rgba(79,125,255,.10) 45%, transparent 70%);
  pointer-events:none;
}
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:.84rem;
  color:var(--text-light);
  margin-bottom:22px;
}
.crumbs a:hover{color:var(--brand-glow);}
.crumbs span.sep{color:rgba(106,125,163,.7);}
.cat-hero h1{
  font-size:clamp(2.1rem,4.4vw,3.5rem);
  font-weight:800;
  line-height:1.15;
  letter-spacing:.01em;
  max-width:820px;
}
.cat-hero .hero-sub{
  margin-top:20px;
  max-width:660px;
  font-size:clamp(1rem,1.6vw,1.12rem);
  color:var(--text-sub);
  line-height:1.8;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-metrics{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
  margin-top:44px;
  max-width:760px;
}
.hero-metric{
  background:var(--glass-bg-soft);
  border:1px solid var(--glass-border-soft);
  border-radius:var(--radius-sm);
  padding:16px 18px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.hero-metric .num{
  font-family:var(--font-en);
  font-size:1.55rem;
  font-weight:700;
  color:var(--brand-glow);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.hero-metric .lbl{
  display:block;
  margin-top:6px;
  font-size:.82rem;
  color:var(--text-light);
}

/* 卡片网格 */
.grid-cards{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.g-card{
  background:var(--glass-bg);
  border:1px solid var(--glass-border-soft);
  border-radius:var(--radius-card);
  padding:22px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  transition:transform .26s ease, box-shadow .26s ease, background .26s ease, border-color .26s ease;
  display:flex;
  flex-direction:column;
  gap:16px;
}
@supports not (backdrop-filter:blur(14px)){
  .g-card{background:rgba(10,18,38,.92);}
}
.g-card:hover{
  transform:translateY(-4px);
  background:rgba(255,255,255,.09);
  border-color:rgba(41,230,255,.45);
  box-shadow:0 0 0 1px rgba(41,230,255,.18), 0 26px 54px -22px rgba(41,230,255,.42);
}
.card-media{
  position:relative;
  aspect-ratio:4/3;
  border-radius:var(--radius-sm);
  overflow:hidden;
  background:
    linear-gradient(135deg, rgba(79,125,255,.35), rgba(41,230,255,.18)),
    repeating-linear-gradient(45deg, rgba(255,255,255,.05) 0 10px, transparent 10px 20px);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.10), inset 0 0 40px rgba(41,230,255,.12);
}
.card-media img{
  width:100%;height:100%;
  object-fit:cover;
  border-radius:var(--radius-sm);
  transition:transform .4s ease;
}
.g-card:hover .card-media img{transform:scale(1.04);}
.card-body{display:flex;flex-direction:column;gap:12px;flex:1;}
.card-title{
  font-size:1.14rem;
  font-weight:600;
  line-height:1.45;
  letter-spacing:.01em;
}
.card-text{
  color:var(--text-sub);
  font-size:.94rem;
  line-height:1.78;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-meta{
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  font-size:.8rem;
  color:var(--text-light);
  font-variant-numeric:tabular-nums;
}
.card-meta .dot{width:3px;height:3px;border-radius:50%;background:rgba(106,125,163,.8);}
.card-link{
  margin-top:auto;
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:.88rem;
  font-weight:600;
  color:var(--brand-glow);
}
.card-link:hover{gap:11px;}
.card-link svg{transition:transform .22s ease;}

/* 重点导读 */
.feature-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr;
  gap:24px;
  align-items:stretch;
}
.feature-main{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--glass-border-soft);
  min-height:420px;
  background:#0A1226;
  display:flex;
  align-items:flex-end;
}
.feature-main img{
  position:absolute;
  inset:0;
  width:100%;height:100%;
  object-fit:cover;
  border-radius:0;
}
.feature-main .veil{
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(6,13,31,.35) 0%, rgba(6,13,31,.86) 62%, rgba(6,13,31,.96) 100%);
}
.feature-content{
  position:relative;
  padding:32px;
  z-index:2;
}
.feature-content h3{
  font-size:clamp(1.25rem,2vw,1.6rem);
  font-weight:700;
  margin:14px 0 12px;
  line-height:1.4;
}
.feature-content p{color:var(--text-sub);font-size:.95rem;line-height:1.8;max-width:560px;}
.feature-list{display:flex;flex-direction:column;gap:16px;}
.feature-item{
  display:grid;
  grid-template-columns:108px 1fr;
  gap:16px;
  align-items:center;
  background:var(--glass-bg-soft);
  border:1px solid var(--glass-border-soft);
  border-radius:var(--radius-sm);
  padding:14px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:transform .24s ease, border-color .24s ease, background .24s ease;
  flex:1;
}
.feature-item:hover{
  transform:translateY(-3px);
  border-color:rgba(41,230,255,.40);
  background:rgba(255,255,255,.08);
}
.feature-item .thumb{
  aspect-ratio:1/1;
  border-radius:10px;
  overflow:hidden;
  background:linear-gradient(135deg, rgba(79,125,255,.35), rgba(41,230,255,.18));
}
.feature-item .thumb img{width:100%;height:100%;object-fit:cover;border-radius:10px;}
.feature-item h4{font-size:1rem;font-weight:600;line-height:1.45;}
.feature-item span{
  display:block;
  margin-top:7px;
  font-size:.78rem;
  color:var(--text-light);
  font-variant-numeric:tabular-nums;
}

/* 流程时间线 */
.flow{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
  position:relative;
}
.flow-item{
  background:var(--glass-bg-soft);
  border:1px solid var(--glass-border-soft);
  border-radius:var(--radius-card);
  padding:26px 22px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:transform .24s ease, border-color .24s ease, background .24s ease;
  position:relative;
}
.flow-item:hover{
  transform:translateY(-4px);
  border-color:rgba(41,230,255,.42);
  background:rgba(255,255,255,.08);
}
.flow-item .step{
  font-family:var(--font-en);
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--brand-glow);
  font-variant-numeric:tabular-nums;
}
.flow-item h3{
  margin:14px 0 10px;
  font-size:1.05rem;
  font-weight:600;
  line-height:1.45;
}
.flow-item p{color:var(--text-sub);font-size:.9rem;line-height:1.78;}
.flow-item::before{
  content:"";
  position:absolute;
  top:0;left:22px;
  width:38px;height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-glow));
}

/* 属性面板 */
.panel-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.panel{
  background:var(--glass-bg);
  border:1px solid var(--glass-border-soft);
  border-radius:var(--radius-card);
  padding:30px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.panel h3{font-size:1.2rem;font-weight:600;margin-bottom:18px;}
.attr-row{
  display:flex;
  justify-content:space-between;
  gap:16px;
  padding:13px 0;
  border-bottom:1px dashed rgba(255,255,255,.10);
  font-size:.92rem;
}
.attr-row:last-child{border-bottom:none;}
.attr-row .k{color:var(--text-light);}
.attr-row .v{color:var(--text-main);font-weight:500;text-align:right;}
.check-list{display:flex;flex-direction:column;gap:14px;}
.check-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:.94rem;
  color:var(--text-sub);
  line-height:1.75;
}
.check-list .ic{
  flex-shrink:0;
  width:22px;height:22px;
  border-radius:7px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(41,230,255,.12);
  color:var(--brand-glow);
  font-size:.72rem;
  margin-top:3px;
}

/* 场景对比 */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.scene-card{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--glass-border-soft);
  background:var(--glass-bg-soft);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:transform .26s ease, border-color .26s ease;
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(41,230,255,.38);}
.scene-card .pic{
  min-height:210px;
  background:linear-gradient(135deg, rgba(79,125,255,.35), rgba(41,230,255,.16));
}
.scene-card .pic img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.scene-body{padding:26px 22px;display:flex;flex-direction:column;gap:12px;}
.scene-body h3{font-size:1.08rem;font-weight:600;line-height:1.45;}
.scene-body p{color:var(--text-sub);font-size:.9rem;line-height:1.78;}

/* FAQ */
.faq-wrap{display:flex;flex-direction:column;gap:14px;max-width:900px;}
.faq-item{
  background:var(--glass-bg-soft);
  border:1px solid var(--glass-border-soft);
  border-radius:var(--radius-sm);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  overflow:hidden;
  transition:border-color .24s ease, background .24s ease;
}
.faq-item[open]{border-color:rgba(41,230,255,.40);background:rgba(255,255,255,.075);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:20px 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  font-size:1rem;
  font-weight:600;
  min-height:44px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  font-family:var(--font-en);
  font-size:1.3rem;
  line-height:1;
  color:var(--brand-glow);
  flex-shrink:0;
  transition:transform .24s ease;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-answer{
  padding:0 24px 22px;
  color:var(--text-sub);
  font-size:.94rem;
  line-height:1.8;
  border-top:1px solid rgba(255,255,255,.07);
  padding-top:16px;
  margin-top:0;
}

/* CTA + 表单 */
.cta-box{
  position:relative;
  border-radius:24px;
  border:1px solid rgba(41,230,255,.24);
  background:
    linear-gradient(135deg, rgba(79,125,255,.16), rgba(41,230,255,.08) 55%, rgba(255,255,255,.03)),
    var(--bg-panel);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:0 30px 70px -34px rgba(41,230,255,.45);
  padding:44px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:start;
}
.cta-box h2{
  font-size:clamp(1.5rem,2.6vw,2.1rem);
  font-weight:700;
  line-height:1.32;
}
.cta-box .cta-desc{
  margin-top:16px;
  color:var(--text-sub);
  font-size:.96rem;
  line-height:1.8;
}
.cta-points{margin-top:26px;display:flex;flex-direction:column;gap:12px;}
.cta-points li{
  display:flex;gap:10px;align-items:center;
  font-size:.9rem;color:var(--text-sub);
}
.cta-points li::before{
  content:"";
  width:6px;height:6px;border-radius:2px;
  background:var(--brand-glow);
  box-shadow:0 0 10px rgba(41,230,255,.8);
  flex-shrink:0;
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:.84rem;color:var(--text-light);}
.field input,.field select,.field textarea{
  width:100%;
  background:rgba(6,13,31,.72);
  border:1px solid var(--glass-border);
  border-radius:12px;
  padding:12px 14px;
  font-size:.92rem;
  color:var(--text-main);
  transition:border-color .22s ease, box-shadow .22s ease, background .22s ease;
  min-height:44px;
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:rgba(106,125,163,.9);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:rgba(41,230,255,.55);
  box-shadow:0 0 0 3px rgba(41,230,255,.14);
  background:rgba(6,13,31,.9);
}
.field select option{background:#0A1226;color:var(--text-main);}
.form-note{font-size:.78rem;color:var(--text-light);margin-top:12px;line-height:1.7;}

/* 页脚 */
.site-footer{
  margin-top:40px;
  border-top:1px solid rgba(255,255,255,.08);
  background:rgba(10,18,38,.72);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  position:relative;
  z-index:1;
}
.footer-top{
  padding:64px 0 44px;
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;
}
.footer-brand .brand-logo{margin-bottom:16px;}
.footer-tagline{
  color:var(--text-light);
  font-size:.88rem;
  line-height:1.85;
  max-width:340px;
}
.footer-col h4{
  font-size:.92rem;
  font-weight:600;
  color:var(--text-main);
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{
  font-size:.86rem;
  color:var(--text-light);
}
.footer-col a:hover{color:var(--brand-glow);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.07);
  padding:22px 0 30px;
  display:flex;
  flex-wrap:wrap;
  gap:12px 26px;
  align-items:center;
  justify-content:space-between;
  font-size:.8rem;
  color:var(--text-light);
}
.footer-bottom .copyright{color:var(--text-sub);}

/* 响应式 */
@media (max-width:1024px){
  .main-nav{display:none;}
  .burger-btn{display:inline-flex;}
  .nav-cta .btn{display:none;}
  .grid-cards{grid-template-columns:repeat(2,minmax(0,1fr));}
  .feature-grid{grid-template-columns:1fr;}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr));}
  .panel-grid{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:1fr;}
  .cta-box{grid-template-columns:1fr;padding:34px;gap:28px;}
  .footer-top{grid-template-columns:1fr 1fr;gap:30px;}
  .section{padding:80px 0;}
}
@media (max-width:768px){
  .section{padding:64px 0;}
  .section-tight{padding:54px 0;}
  .cat-hero{padding:128px 0 60px;min-height:auto;}
  .hero-metrics{grid-template-columns:1fr;gap:12px;}
  .hero-metric{display:flex;align-items:center;justify-content:space-between;}
  .hero-metric .lbl{margin-top:0;}
  .grid-cards{grid-template-columns:1fr;}
  .flow{grid-template-columns:1fr;}
  .scene-card{grid-template-columns:1fr;}
  .scene-card .pic{min-height:190px;}
  .form-grid{grid-template-columns:1fr;}
  .cta-box{padding:26px;}
  .footer-top{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .container-x{padding-left:18px;padding-right:18px;}
  .nav-shell{padding:0 18px;height:66px;gap:14px;}
  .mobile-menu{inset:66px 0 0 0;}
  .brand-logo{font-size:.94rem;}
  .brand-logo span:last-child{max-width:190px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .cat-hero h1{font-size:1.9rem;}
  .feature-content{padding:22px;}
  .feature-item{grid-template-columns:88px 1fr;gap:12px;}
  .panel{padding:22px;}
  .attr-row{flex-direction:column;gap:4px;}
  .attr-row .v{text-align:left;}
  .faq-item summary{padding:16px 18px;font-size:.95rem;}
  .faq-answer{padding:0 18px 18px;padding-top:14px;}
}