/* roulang page: index */
:root {
        --bg-deep: #06131F;
        --bg-card: #0D1A2B;
        --bg-nav: rgba(7, 22, 34, 0.72);
        --primary: #1F7AEC;
        --action: #33E6C6;
        --cta: #FFC857;
        --text: #E8F0F8;
        --muted: #9AAFC0;
        --line: rgba(255, 255, 255, 0.12);
        --radius-xl: 20px;
        --radius-lg: 16px;
        --shadow-card: 0 18px 48px rgba(0, 0, 0, 0.28);
    }

    * {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Helvetica Neue", Arial, sans-serif;
        background-color: var(--bg-deep);
        color: var(--text);
        line-height: 1.75;
        -webkit-font-smoothing: antialiased;
    }

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

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

    ul, ol {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    button,
    input {
        font-family: inherit;
    }

    :focus-visible {
        outline: 2px solid var(--cta);
        outline-offset: 3px;
    }

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

    .brand-logo {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-weight: 800;
        font-size: 21px;
        letter-spacing: .5px;
        white-space: nowrap;
        line-height: 1.2;
    }

    .brand-logo span {
        color: var(--action);
        font-weight: 700;
    }

    .brand-logo .mark {
        width: 30px;
        height: 30px;
        border-radius: 10px;
        background: linear-gradient(135deg, var(--primary), var(--action));
        display: inline-flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 0 16px rgba(31, 122, 236, .45);
        color: #fff;
        font-size: 15px;
        font-weight: 900;
        flex: none;
    }

    .topbar {
        background: #040D15;
        border-bottom: 1px solid rgba(255, 255, 255, .05);
        min-height: 38px;
    }

    .topbar-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        min-height: 38px;
        gap: 16px;
        font-size: 13px;
    }

    .topbar-domain {
        font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
        color: #7996AA;
        letter-spacing: .4px;
    }

    .topbar-tip {
        color: #9AAFC0;
        letter-spacing: .2px;
    }

    .ghost-line-btn {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        border: 1px solid rgba(255, 200, 87, .5);
        color: var(--cta);
        padding: 3px 14px;
        border-radius: 999px;
        font-size: 12px;
        transition: all .25s ease;
        background: rgba(255, 200, 87, .04);
    }

    .ghost-line-btn:hover {
        background: rgba(255, 200, 87, .15);
        border-color: var(--cta);
        box-shadow: 0 0 12px rgba(255, 200, 87, .3);
    }

    .navbar-wrap {
        position: sticky;
        top: 0;
        z-index: 100;
        transition: background .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
        background: rgba(7, 22, 34, .58);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-bottom: 1px solid rgba(255, 255, 255, .06);
    }

    .navbar-wrap.is-stuck {
        background: rgba(6, 19, 31, .88);
        box-shadow: 0 8px 30px rgba(0, 0, 0, .35);
    }

    .nav-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
        min-height: 68px;
        position: relative;
    }

    .main-nav {
        display: flex;
        align-items: center;
        gap: 6px;
        flex-wrap: wrap;
    }

    .nav-link {
        display: inline-flex;
        align-items: center;
        padding: 10px 14px;
        border-radius: 10px;
        color: #C9D6E2;
        font-size: 14px;
        font-weight: 500;
        position: relative;
        transition: color .25s ease, background .25s ease;
        white-space: nowrap;
    }

    .nav-link::after {
        content: "";
        position: absolute;
        left: 14px;
        right: 14px;
        bottom: 3px;
        height: 2px;
        background: linear-gradient(90deg, var(--primary), var(--action));
        border-radius: 2px;
        transform: scaleX(0);
        transform-origin: left center;
        transition: transform .3s ease;
    }

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

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

    .nav-link.active {
        color: var(--action);
        font-weight: 600;
    }

    .nav-cta-btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 20px;
        border-radius: 999px;
        font-weight: 700;
        font-size: 14px;
        background: linear-gradient(135deg, var(--cta), #F5A623);
        color: #0D1A2B;
        box-shadow: 0 6px 22px rgba(255, 200, 87, .3);
        transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
        border: none;
        cursor: pointer;
        white-space: nowrap;
    }

    .nav-cta-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 30px rgba(255, 200, 87, .4);
        filter: brightness(1.03);
    }

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

    .hamburger {
        display: none;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        width: 44px;
        height: 44px;
        padding: 10px;
        background: transparent;
        border: 1px solid rgba(255, 255, 255, .12);
        border-radius: 10px;
        cursor: pointer;
        transition: background .2s ease;
    }

    .hamburger span {
        height: 2px;
        background: #fff;
        border-radius: 2px;
        transition: transform .3s ease, opacity .2s ease;
    }

    .hamburger.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

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

    .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        font-weight: 600;
        color: var(--action);
        letter-spacing: 1px;
        text-transform: uppercase;
    }

    .eyebrow::before {
        content: "";
        width: 20px;
        height: 2px;
        background: var(--action);
        border-radius: 2px;
    }

    .hero-section {
        position: relative;
        background: #071722 url("/assets/images/backpic/back-1.png") center / cover no-repeat;
        overflow: hidden;
        padding-top: 120px;
        padding-bottom: 120px;
    }

    .hero-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(90deg, rgba(6, 19, 31, .96) 0%, rgba(6, 19, 31, .84) 42%, rgba(6, 19, 31, .6) 100%);
    }

    .hero-inner {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: 1.1fr .9fr;
        gap: 52px;
        align-items: center;
    }

    .hero-kicker {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 6px 14px;
        border-radius: 999px;
        background: rgba(51, 230, 198, .1);
        border: 1px solid rgba(51, 230, 198, .3);
        color: #B8F7EA;
        font-size: 13px;
        letter-spacing: .4px;
        margin-bottom: 22px;
    }

    .pulse-dot {
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: var(--action);
        box-shadow: 0 0 0 0 rgba(51, 230, 198, .6);
        animation: pulse 2s infinite;
    }

    @keyframes pulse {
        0% {
            box-shadow: 0 0 0 0 rgba(51, 230, 198, .55);
        }
        70% {
            box-shadow: 0 0 0 8px rgba(51, 230, 198, 0);
        }
        100% {
            box-shadow: 0 0 0 0 rgba(51, 230, 198, 0);
        }
    }

    .hero-title {
        font-size: 52px;
        line-height: 1.22;
        font-weight: 800;
        letter-spacing: .5px;
        margin: 0 0 22px;
    }

    .hero-title .highlight {
        color: var(--action);
        position: relative;
        white-space: nowrap;
    }

    .hero-lead {
        color: #C1D2E1;
        font-size: 17px;
        max-width: 540px;
        margin: 0 0 32px;
        line-height: 1.9;
    }

    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
        margin-bottom: 28px;
    }

    .btn-primary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        border-radius: 999px;
        font-weight: 700;
        font-size: 15px;
        padding: 13px 28px;
        background: linear-gradient(135deg, var(--cta), #F5A623);
        color: #0D1A2B;
        box-shadow: 0 8px 26px rgba(255, 200, 87, .3);
        transition: all .25s ease;
        border: none;
        cursor: pointer;
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 36px rgba(255, 200, 87, .4);
    }

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

    .btn-secondary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        border-radius: 999px;
        font-weight: 600;
        font-size: 15px;
        padding: 13px 28px;
        background: rgba(31, 122, 236, .12);
        border: 1px solid rgba(31, 122, 236, .55);
        color: #BFDBFF;
        transition: all .25s ease;
        cursor: pointer;
        backdrop-filter: blur(8px);
    }

    .btn-secondary:hover {
        background: rgba(31, 122, 236, .24);
        border-color: var(--primary);
        color: #fff;
        box-shadow: 0 0 22px rgba(31, 122, 236, .3);
    }

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

    .hero-trust {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
        color: #A9BDCC;
        font-size: 13px;
    }

    .hero-trust li {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .hero-trust li::before {
        content: "✓";
        color: var(--action);
        font-weight: 700;
    }

    .glass-panel {
        border-radius: 26px;
        background: rgba(255, 255, 255, .08);
        border: 1px solid rgba(255, 255, 255, .14);
        backdrop-filter: blur(22px);
        -webkit-backdrop-filter: blur(22px);
        padding: 28px;
        box-shadow: 0 24px 60px rgba(0, 0, 0, .4);
        position: relative;
        overflow: hidden;
    }

    .glass-panel::before {
        content: "";
        position: absolute;
        top: -80px;
        right: -60px;
        width: 200px;
        height: 200px;
        background: radial-gradient(circle, rgba(51, 230, 198, .35), transparent 65%);
        pointer-events: none;
    }

    .glass-panel img {
        border-radius: 16px;
        border: 1px solid rgba(255, 255, 255, .14);
        object-fit: cover;
        width: 100%;
        height: 190px;
        background: #0D1A2B;
        margin-bottom: 22px;
    }

    .panel-status-row {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 16px;
    }

    .panel-status-row span {
        color: #C6D8E5;
    }

    .online-badge {
        background: rgba(51, 230, 198, .15);
        border: 1px solid rgba(51, 230, 198, .45);
        padding: 4px 12px;
        border-radius: 999px;
        color: #B8F7EA;
        font-size: 13px;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .online-badge::before {
        content: "";
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: var(--action);
        box-shadow: 0 0 8px var(--action);
    }

    .panel-line {
        padding: 12px 0;
        border-top: 1px solid rgba(255, 255, 255, .08);
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 14px;
        gap: 18px;
    }

    .panel-line span {
        color: #A4B9CA;
    }

    .panel-line strong {
        color: #E8F0F8;
        font-weight: 600;
        text-align: right;
    }

    .panel-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        margin-top: 20px;
        padding: 13px 20px;
        border-radius: 14px;
        background: linear-gradient(135deg, var(--primary), #1763C0);
        color: #fff;
        font-weight: 700;
        transition: all .25s ease;
        border: 1px solid rgba(255, 255, 255, .1);
        box-shadow: 0 8px 28px rgba(31, 122, 236, .3);
        cursor: pointer;
    }

    .panel-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 34px rgba(31, 122, 236, .45);
        filter: brightness(1.06);
    }

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

    .section-head {
        max-width: 840px;
        margin-bottom: 48px;
    }

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

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

    .section-head h2 {
        font-size: 34px;
        line-height: 1.35;
        font-weight: 800;
        margin: 14px 0 12px;
        letter-spacing: .3px;
    }

    .section-head p {
        color: var(--muted);
        font-size: 16px;
        margin: 0;
    }

    .pain-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 22px;
        margin-bottom: 42px;
    }

    .pain-item {
        border-radius: 20px;
        background: rgba(255, 255, 255, .04);
        border: 1px solid rgba(255, 255, 255, .08);
        padding: 28px;
        position: relative;
        transition: all .3s ease;
    }

    .pain-item:hover {
        background: rgba(255, 255, 255, .07);
        border-color: rgba(255, 255, 255, .16);
        transform: translateY(-4px);
    }

    .pain-num {
        font-size: 13px;
        color: var(--cta);
        font-weight: 700;
        letter-spacing: 1px;
        margin-bottom: 14px;
        display: block;
    }

    .pain-item h3 {
        font-size: 18px;
        margin: 0 0 10px;
        font-weight: 700;
        line-height: 1.5;
    }

    .pain-item p {
        color: var(--muted);
        font-size: 14px;
        line-height: 1.8;
        margin: 0;
    }

    .pain-bridge {
        border-left: 4px solid var(--action);
        background: rgba(51, 230, 198, .08);
        padding: 22px 26px;
        border-radius: 0 18px 18px 0;
        color: #D3E8F2;
        font-size: 16px;
        line-height: 1.9;
        max-width: 900px;
    }

    .pain-bridge strong {
        color: var(--action);
        font-weight: 700;
    }

    .solution-section {
        background: #081723;
        position: relative;
    }

    .solution-section::before {
        content: "";
        position: absolute;
        inset: 0;
        background-image: linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
        background-size: 46px 46px;
        pointer-events: none;
    }

    .solution-grid {
        display: grid;
        grid-template-columns: .9fr 1.1fr;
        gap: 54px;
        align-items: center;
        position: relative;
    }

    .cover-image-wrap {
        border-radius: 24px;
        overflow: hidden;
        border: 1px solid rgba(255, 255, 255, .14);
        box-shadow: var(--shadow-card);
    }

    .cover-image-wrap img {
        width: 100%;
        height: 460px;
        object-fit: cover;
    }

    .cover-caption {
        margin-top: 16px;
        font-size: 13px;
        color: var(--muted);
        background: rgba(255, 255, 255, .05);
        border-radius: 12px;
        padding: 12px 16px;
        line-height: 1.7;
        list-style: none;
    }

    .cover-caption::before {
        content: "·";
        color: var(--action);
        font-size: 24px;
        margin-right: 8px;
        line-height: 1;
    }

    .flow-steps {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    .flow-step {
        display: flex;
        gap: 18px;
        align-items: flex-start;
        border-radius: 18px;
        background: rgba(255, 255, 255, .04);
        border: 1px solid rgba(255, 255, 255, .1);
        padding: 22px;
        transition: background .25s ease, border-color .25s ease;
    }

    .flow-step:hover {
        background: rgba(255, 255, 255, .07);
        border-color: rgba(51, 230, 198, .3);
    }

    .step-num {
        width: 42px;
        height: 42px;
        border-radius: 14px;
        flex: none;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 15px;
        font-weight: 800;
        color: #fff;
        background: linear-gradient(135deg, var(--primary), #1760B5);
        box-shadow: 0 6px 14px rgba(31, 122, 236, .35);
    }

    .flow-step h3 {
        font-size: 17px;
        margin: 0 0 6px;
        font-weight: 700;
        color: #F0F7FC;
    }

    .flow-step p {
        margin: 0;
        color: var(--muted);
        font-size: 14px;
        line-height: 1.8;
    }

    .metric-section {
        background: linear-gradient(180deg, #081723, #06131F);
        padding-bottom: 96px;
    }

    .metric-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 22px;
    }

    .metric-card {
        border-radius: 22px;
        background: rgba(255, 255, 255, .045);
        border: 1px solid rgba(255, 255, 255, .1);
        padding: 32px 24px;
        transition: all .3s ease;
        text-align: center;
    }

    .metric-card:hover {
        transform: translateY(-5px);
        background: rgba(255, 255, 255, .08);
        border-color: rgba(51, 230, 198, .3);
        box-shadow: 0 18px 40px rgba(0, 0, 0, .3);
    }

    .metric-num {
        font-size: 38px;
        line-height: 1;
        font-weight: 700;
        color: var(--action);
        letter-spacing: -1px;
        font-variant-numeric: tabular-nums;
        margin-bottom: 14px;
    }

    .metric-card h3 {
        font-size: 16px;
        margin: 0 0 10px;
        font-weight: 700;
        color: #E9F2F7;
    }

    .metric-card p {
        color: var(--muted);
        font-size: 13px;
        margin: 0;
        line-height: 1.8;
    }

    .testimonials-grid {
        display: grid;
        grid-template-columns: 1.15fr .85fr;
        gap: 28px;
    }

    .testimonial-main {
        border-radius: 24px;
        padding: 38px;
        background:
            linear-gradient(135deg, rgba(31, 122, 236, .14), rgba(51, 230, 198, .06)),
            rgba(255, 255, 255, .05);
        border: 1px solid rgba(255, 255, 255, .14);
        position: relative;
        box-shadow: var(--shadow-card);
    }

    .testimonial-main blockquote {
        margin: 0;
        font-size: 18px;
        line-height: 2;
        color: #EAF3F8;
        padding-left: 28px;
        border-left: 4px solid var(--action);
    }

    .testimonial-main figcaption {
        margin-top: 22px;
        color: var(--muted);
        font-size: 14px;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .testimonial-main figcaption::before {
        content: "";
        width: 36px;
        height: 2px;
        background: var(--cta);
    }

    .testimonials-sub {
        display: grid;
        grid-template-rows: repeat(3, 1fr);
        gap: 18px;
    }

    .testimonial-card {
        border-radius: 18px;
        background: rgba(255, 255, 255, .04);
        border: 1px solid rgba(255, 255, 255, .08);
        padding: 20px 22px;
        transition: all .25s ease;
    }

    .testimonial-card:hover {
        background: rgba(255, 255, 255, .07);
        transform: translateX(-4px);
        border-color: rgba(255, 255, 255, .16);
    }

    .testimonial-card p {
        margin: 0 0 8px;
        color: #D3E2EC;
        font-size: 14px;
        line-height: 1.8;
    }

    .testimonial-card span {
        color: var(--muted);
        font-size: 12px;
    }

    .news-section {
        background: rgba(255, 255, 255, .025);
    }

    .news-head-row {
        display: flex;
        justify-content: space-between;
        align-items: flex-end;
        gap: 20px;
        margin-bottom: 42px;
        flex-wrap: wrap;
    }

    .news-head-row h2 {
        font-size: 32px;
        font-weight: 800;
        margin: 0;
    }

    .more-link {
        color: var(--action);
        font-size: 14px;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: gap .25s ease;
        font-weight: 600;
    }

    .more-link:hover {
        gap: 14px;
    }

    .news-list {
        display: flex;
        flex-direction: column;
        gap: 18px;
    }

    .news-item {
        display: grid;
        grid-template-columns: 1fr;
        gap: 6px;
        border-radius: 18px;
        background: rgba(255, 255, 255, .04);
        border: 1px solid rgba(255, 255, 255, .08);
        padding: 24px 26px;
        transition: transform .25s ease, background .25s ease, border-color .25s ease;
    }

    .news-item:hover {
        transform: translateX(4px);
        background: rgba(255, 255, 255, .07);
        border-color: rgba(255, 255, 255, .18);
    }

    .news-meta {
        display: flex;
        align-items: center;
        gap: 14px;
        margin-bottom: 6px;
        flex-wrap: wrap;
    }

    .news-tag {
        background: rgba(51, 230, 198, .12);
        color: #8DE8D5;
        border: 1px solid rgba(51, 230, 198, .25);
        border-radius: 999px;
        padding: 3px 12px;
        font-size: 12px;
    }

    .news-meta time {
        font-size: 13px;
        color: #8095A6;
        font-family: Consolas, monospace;
    }

    .news-item h3 {
        font-size: 18px;
        margin: 6px 0 8px;
        font-weight: 700;
    }

    .news-item h3 a {
        color: #EAF3F8;
        transition: color .2s ease;
    }

    .news-item h3 a:hover {
        color: var(--action);
    }

    .news-item p {
        color: var(--muted);
        font-size: 14px;
        margin: 0 0 6px;
        line-height: 1.8;
    }

    .news-more {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: var(--action);
        font-weight: 600;
        transition: gap .25s ease;
    }

    .news-more:hover {
        gap: 14px;
    }

    .news-empty {
        grid-column: 1 / -1;
        border-radius: 18px;
        padding: 32px;
        background: rgba(255, 255, 255, .04);
        border: 1px dashed rgba(255, 255, 255, .16);
        color: var(--muted);
        text-align: center;
        font-size: 15px;
    }

    .faq-list {
        max-width: 860px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .faq-item {
        border-radius: 18px;
        background: rgba(255, 255, 255, .04);
        border: 1px solid rgba(255, 255, 255, .08);
        transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
        overflow: hidden;
    }

    .faq-item.open {
        background: rgba(255, 255, 255, .065);
        border-color: rgba(51, 230, 198, .35);
        box-shadow: 0 0 0 1px rgba(51, 230, 198, .08), 0 12px 32px rgba(0, 0, 0, .25);
    }

    .faq-q {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: 22px 24px;
        gap: 20px;
        background: transparent;
        border: none;
        color: #E9F2F7;
        font-size: 16px;
        font-weight: 600;
        cursor: pointer;
        line-height: 1.6;
        text-align: left;
        transition: color .2s ease;
    }

    .faq-q:hover {
        color: var(--action);
    }

    .faq-icon {
        flex: none;
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: rgba(255, 255, 255, .08);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        color: var(--action);
        transition: transform .2s ease;
        line-height: 1;
    }

    .faq-item.open .faq-icon {
        transform: rotate(45deg);
        background: rgba(51, 230, 198, .18);
    }

    .faq-a {
        max-height: 0;
        overflow: hidden;
        padding: 0 24px;
        transition: max-height .3s ease, padding .3s ease;
    }

    .faq-item.open .faq-a {
        max-height: 240px;
        padding: 0 24px 24px;
    }

    .faq-a p {
        color: var(--muted);
        font-size: 14px;
        line-height: 1.9;
        margin: 0;
        padding-top: 4px;
    }

    .cta-section {
        position: relative;
        overflow: hidden;
        padding: 110px 0;
        background: linear-gradient(135deg, #0A1A2F, #071722 70%);
        text-align: center;
    }

    .cta-section::before {
        content: "";
        position: absolute;
        top: -120px;
        left: 50%;
        transform: translateX(-50%);
        width: 600px;
        height: 600px;
        background: radial-gradient(circle, rgba(31, 122, 236, .35), transparent 65%);
        pointer-events: none;
    }

    .cta-section::after {
        content: "";
        position: absolute;
        bottom: -80px;
        right: 5%;
        width: 300px;
        height: 300px;
        background: radial-gradient(circle, rgba(51, 230, 198, .18), transparent 70%);
        pointer-events: none;
    }

    .cta-content {
        position: relative;
        z-index: 2;
        max-width: 780px;
        margin: 0 auto;
    }

    .cta-content h2 {
        font-size: 42px;
        line-height: 1.3;
        font-weight: 800;
        margin: 0 0 20px;
    }

    .cta-content p {
        color: var(--muted);
        font-size: 17px;
        margin: 0 0 32px;
        line-height: 1.9;
    }

    .cta-actions {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 14px;
    }

    .btn-glow-cyan {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 999px;
        padding: 14px 32px;
        font-weight: 700;
        font-size: 15px;
        background: linear-gradient(135deg, var(--action), #16B9A4);
        color: #03201C;
        border: none;
        cursor: pointer;
        box-shadow: 0 10px 30px rgba(51, 230, 198, .32);
        transition: all .25s ease;
    }

    .btn-glow-cyan:hover {
        transform: translateY(-2px);
        box-shadow: 0 14px 38px rgba(51, 230, 198, .4);
    }

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

    .footer {
        background: #040D15;
        border-top: 1px solid rgba(255, 255, 255, .06);
        padding: 60px 0 24px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.2fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255, 255, 255, .06);
    }

    .footer-brand p {
        margin: 18px 0 0;
        color: #8095A6;
        font-size: 14px;
        max-width: 400px;
        line-height: 1.9;
    }

    .footer-col h4 {
        margin: 0 0 20px;
        font-size: 16px;
        font-weight: 700;
        color: #EAF3F8;
    }

    .footer-links {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .footer-links a {
        color: #97ABBC;
        font-size: 14px;
        transition: color .2s ease;
    }

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

    .footer-safe {
        padding: 26px 0;
        border-bottom: 1px solid rgba(255, 255, 255, .05);
        display: flex;
        justify-content: center;
        text-align: center;
        color: #7A8FA1;
        font-size: 13px;
        flex-wrap: wrap;
        gap: 8px;
    }

    .footer-bottom {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding-top: 22px;
        flex-wrap: wrap;
    }

    .footer-bottom .copyright {
        color: #6D8293;
        font-size: 13px;
        font-family: "SFMono-Regular", Consolas, monospace;
    }

    .footer-bottom .copyright span {
        font-family: inherit;
        color: #8FA7B8;
    }

    .footer-note {
        color: #65788A;
        font-size: 12px;
    }

    @media (max-width: 1023px) {
        .hero-inner {
            grid-template-columns: 1fr;
            padding-top: 16px;
        }

        .solution-grid {
            grid-template-columns: 1fr;
            gap: 34px;
        }

        .cover-image-wrap img {
            height: 340px;
        }

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

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

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

        .main-nav {
            position: absolute;
            top: calc(100% + 0px);
            left: 0;
            right: 0;
            background: rgba(6, 19, 31, .97);
            backdrop-filter: blur(18px);
            flex-direction: column;
            align-items: stretch;
            padding: 16px 20px 24px;
            border-radius: 0 0 18px 18px;
            box-shadow: 0 24px 40px rgba(0, 0, 0, .4);
            display: none;
            max-height: 80vh;
            overflow-y: auto;
            z-index: 200;
        }

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

        .nav-link {
            padding: 13px 12px;
            font-size: 15px;
            white-space: normal;
        }

        .nav-link::after {
            display: none;
        }

        .nav-link.active {
            background: rgba(51, 230, 198, .08);
            border-radius: 10px;
        }

        .hamburger {
            display: flex;
        }

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

    @media (max-width: 767px) {
        section {
            padding-top: 66px;
            padding-bottom: 66px;
        }

        .hero-section {
            padding-top: 70px;
            padding-bottom: 70px;
        }

        .hero-title {
            font-size: 34px;
        }

        .hero-lead {
            font-size: 15px;
        }

        .section-head h2 {
            font-size: 27px;
        }

        .cta-content h2 {
            font-size: 30px;
        }

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

        .glass-panel {
            padding: 20px;
        }

        .glass-panel img {
            height: 160px;
        }

        .news-item {
            padding: 20px;
        }

        .topbar-links {
            gap: 6px;
        }

        .nav-inner {
            padding-top: 10px;
            padding-bottom: 10px;
        }
    }

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

        .topbar-tip {
            display: none;
        }

        .nav-cta-btn {
            padding: 8px 14px;
            font-size: 13px;
        }

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

/* roulang page: category1 */
:root {
            --c-primary: #1F7AEC;
            --c-accent: #33E6C6;
            --c-warn: #FFC857;
            --c-deepbg: #071722;
            --c-panelbg: #0D1A2B;
            --c-text: #E7EEF5;
            --c-text-secondary: #9DB0C2;
            --c-text-weak: #5B7080;
            --c-border: rgba(255, 255, 255, 0.08);
            --c-card-bg: rgba(255, 255, 255, 0.045);
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-glow: 0 0 40px rgba(31, 122, 236, 0.15);
            --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--c-deepbg);
            color: var(--c-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: 0;
            pointer-events: none;
            background:
                radial-gradient(ellipse at 20% 20%, rgba(31, 122, 236, 0.15), transparent 50%),
                radial-gradient(ellipse at 80% 60%, rgba(51, 230, 198, 0.06), transparent 40%),
                linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 100% 100%, 100% 100%, 60px 60px, 60px 60px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--c-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* top info bar */
        .topbar {
            width: 100%;
            background: #050D14;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 13px;
            color: var(--c-text-weak);
            position: relative;
            z-index: 55;
        }
        .topbar .container {
            min-height: 38px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .topbar-domain {
            font-family: 'SF Mono', 'Cascadia Code', Consolas, monospace;
            color: #658197;
            letter-spacing: 0.03em;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .topbar-domain i {
            color: var(--c-accent);
            font-size: 12px;
        }
        .topbar-action {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: #b9cddd;
            border: 1px solid rgba(255, 255, 255, 0.18);
            background: transparent;
            padding: 5px 16px;
            border-radius: 999px;
            font-size: 13px;
            transition: all 0.22s ease;
        }
        .topbar-action:hover {
            border-color: var(--c-accent);
            color: var(--c-accent);
            background: rgba(51, 230, 198, 0.05);
        }
        /* main header */
        .site-header {
            position: relative;
            z-index: 50;
            width: 100%;
            background: rgba(10, 18, 26, 0.75);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid var(--c-border);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .site-header.sticky {
            position: sticky;
            top: 0;
            background: rgba(10, 18, 26, 0.9);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
        }
        .header-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 74px;
            gap: 20px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 21px;
            font-weight: 700;
            color: var(--c-text);
            white-space: nowrap;
        }
        .brand-logo .mark {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--c-primary), #0B8F8A);
            color: #fff;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            font-weight: 700;
            box-shadow: 0 0 20px rgba(31, 122, 236, 0.3);
        }
        .brand-logo span {
            color: var(--c-accent);
            font-weight: 600;
            margin-left: 2px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 10px 16px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: #B6C7D6;
            position: relative;
            white-space: nowrap;
            transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
        }
        .nav-link::after {
            content: "";
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 26px;
            height: 2px;
            background: var(--c-accent);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--c-accent);
            transition: transform 0.25s ease;
        }
        .nav-link:hover {
            color: var(--c-text);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-link.active {
            color: var(--c-accent);
            background: rgba(51, 230, 198, 0.06);
        }
        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(100deg, #1A5ED0, #1F7AEC 45%, #12B5A5);
            color: #fff;
            border: none;
            border-radius: 999px;
            padding: 12px 22px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            box-shadow: 0 0 24px rgba(31, 122, 236, 0.3);
            transition: transform 0.18s ease, box-shadow 0.2s ease, filter 0.2s ease;
            position: relative;
            overflow: hidden;
        }
        .btn-glow::before {
            content: "";
            position: absolute;
            top: 0;
            left: -60%;
            width: 40%;
            height: 100%;
            background: linear-gradient(110deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transform: skewX(-20deg);
            transition: left 0.5s ease;
        }
        .btn-glow:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 30px rgba(31, 122, 236, 0.4);
            filter: brightness(1.08);
        }
        .btn-glow:hover::before {
            left: 120%;
        }
        .btn-glow:active {
            transform: scale(0.98);
        }
        .menu-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--c-border);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            color: var(--c-text);
            font-size: 20px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }

        /* breadcrumb */
        .crumb-wrap {
            background: rgba(13, 26, 43, 0.7);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            padding: 14px 0;
            font-size: 13px;
            color: var(--c-text-weak);
            position: relative;
            z-index: 1;
        }
        .crumb-wrap .container {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .crumb-wrap a {
            color: #8ba1b3;
        }
        .crumb-wrap a:hover {
            color: var(--c-accent);
        }
        .crumb-wrap i {
            font-size: 11px;
            color: #3e5566;
        }
        .crumb-wrap .current {
            color: #a9bdd0;
        }

        /* hero */
        .category-hero {
            position: relative;
            padding: 80px 0 90px;
            background: transparent;
            z-index: 1;
        }
        .category-hero .bg-layer {
            position: absolute;
            inset: 0;
            border-radius: 28px;
            overflow: hidden;
        }
        .category-hero .bg-layer>img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.18;
        }
        .category-hero .overlay-grad {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, transparent 0%, rgba(7, 23, 34, 0.6) 80%);
        }
        .half-ring {
            position: absolute;
            right: -120px;
            top: -80px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(51, 230, 198, 0.12), transparent 70%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            display: grid;
            grid-template-columns: 1.3fr 0.7fr;
            gap: 50px;
            align-items: center;
        }
        .title-main {
            font-size: 44px;
            line-height: 1.2;
            font-weight: 700;
            margin-bottom: 20px;
            color: #F0F6FC;
            letter-spacing: 0.5px;
        }
        .title-main .accent-text {
            background: linear-gradient(95deg, var(--c-accent), #aef0e6 60%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .subhead {
            font-size: 16px;
            line-height: 1.9;
            color: #B6C8D8;
            margin-bottom: 30px;
            max-width: 600px;
        }
        .dot-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 34px;
        }
        .dot-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: #B7C7D5;
            font-size: 14px;
        }
        .dot-list li i {
            color: var(--c-accent);
            margin-top: 3px;
            font-size: 14px;
        }
        .hero-img-panel {
            background: rgba(255, 255, 255, 0.07);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.16);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
        }
        .hero-img-panel img {
            width: 100%;
            height: auto;
            border-radius: 12px;
        }
        .hero-qr-space {
            margin-top: 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 14px 12px;
            background: rgba(0, 0, 0, 0.3);
            border-radius: 14px;
            font-size: 13px;
            color: #c0d2df;
        }

        /* section titles */
        .section-title-wrap {
            margin-bottom: 48px;
            position: relative;
            z-index: 1;
        }
        .section-eyebrow {
            display: inline-block;
            font-size: 13px;
            letter-spacing: 2px;
            color: var(--c-accent);
            text-transform: uppercase;
            margin-bottom: 12px;
            font-weight: 600;
        }
        .section-title {
            font-size: 34px;
            line-height: 1.3;
            font-weight: 700;
            color: #EDF4F8;
            margin-bottom: 16px;
        }
        .section-desc {
            max-width: 720px;
            color: #93A7B9;
            font-size: 15px;
            line-height: 1.8;
        }

        /* service types */
        .service-visual-row {
            display: grid;
            grid-template-columns: 0.55fr 1.45fr;
            gap: 24px;
        }
        .type-tabs {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .type-tab-btn {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.07);
            color: #b8cad9;
            border-radius: 16px;
            padding: 16px 18px;
            text-align: left;
            font-family: inherit;
            font-size: 14px;
            line-height: 1.6;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: all 0.25s ease;
            cursor: pointer;
        }
        .type-tab-btn i {
            font-size: 20px;
            width: 28px;
            color: var(--c-primary);
            text-align: center;
            transition: color 0.25s ease;
        }
        .type-tab-btn:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(0, 0, 0, 0.12);
        }
        .type-tab-btn.active {
            background: rgba(31, 122, 236, 0.14);
            border-color: rgba(31, 122, 236, 0.5);
            color: #ffffff;
            box-shadow: 0 0 18px rgba(31, 122, 236, 0.18);
        }
        .type-tab-btn.active i {
            color: var(--c-accent);
        }
        .service-detail-card {
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid var(--c-border);
            border-radius: 22px;
            padding: 34px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-height: 300px;
        }
        .service-detail h3 {
            font-size: 26px;
            color: #eff5fa;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .service-detail p {
            color: #b2c1cc;
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 22px;
        }
        .service-detail ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px 18px;
        }
        .service-detail ul li {
            font-size: 14px;
            color: #a7bacb;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .service-detail ul li i {
            color: var(--c-accent);
            font-size: 13px;
        }
        .inline-tag {
            background: rgba(255, 200, 87, 0.15);
            border: 1px solid rgba(255, 200, 87, 0.2);
            color: #FFD894;
            padding: 3px 10px;
            border-radius: 999px;
            font-size: 12px;
            margin-left: 8px;
        }

        /* block */
        .block {
            padding: 90px 0;
            position: relative;
            z-index: 1;
        }
        .block-dark {
            background: rgba(13, 26, 43, 0.55);
            border-top: 1px solid var(--c-border);
            border-bottom: 1px solid var(--c-border);
        }
        .block-dark+.block {
            background: transparent;
        }
        /* scn list */
        .scn-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 18px;
        }
        .scn-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--c-border);
            border-radius: 18px;
            padding: 24px 24px;
            transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
        }
        .scn-item:hover {
            transform: translateX(-3px) translateY(-2px);
            border-color: rgba(51, 230, 198, 0.25);
            background: rgba(51, 230, 198, 0.04);
        }
        .scn-index {
            font-family: 'SF Mono', Consolas, monospace;
            font-size: 13px;
            color: var(--c-text-weak);
            letter-spacing: 1px;
            margin-bottom: 10px;
        }
        .scn-item h4 {
            font-size: 18px;
            font-weight: 600;
            color: #e1edf5;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
        }
        .scn-item p {
            font-size: 14px;
            color: #90a4b5;
            line-height: 1.75;
        }
        .scn-item i,
        .scn-item .icon-em {
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(31, 122, 236, 0.15);
            border-radius: 12px;
            color: var(--c-accent);
            font-size: 20px;
            margin-bottom: 18px;
        }

        /* flow */
        .process-line {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
            position: relative;
        }
        .step-node {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--c-border);
            border-radius: 20px;
            padding: 18px;
            position: relative;
            transition: all 0.25s ease;
        }
        .step-node:hover {
            border-color: var(--c-accent);
            box-shadow: 0 0 30px rgba(51, 230, 198, 0.1);
        }
        .step-number {
            font-family: 'SF Mono', Consolas, monospace;
            font-size: 13px;
            color: var(--c-accent);
            margin-bottom: 8px;
        }
        .step-node h4 {
            font-size: 16px;
            font-weight: 600;
            color: #dbe6ee;
            margin-bottom: 8px;
        }
        .step-node p {
            font-size: 14px;
            color: #8fa2b3;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .step-arrow {
            position: absolute;
            top: 50%;
            left: 100%;
            transform: translateY(-50%);
            color: var(--c-primary);
            font-size: 16px;
            z-index: 2;
            margin-left: -14px;
            background: var(--c-deepbg);
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
        }

        /* tips strip */
        .tip-card {
            background: linear-gradient(120deg, rgba(255, 200, 87, 0.1), rgba(255, 200, 87, 0.03));
            border-left: 4px solid var(--c-warn);
            padding: 20px 24px;
            border-radius: 16px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .tip-card i {
            color: var(--c-warn);
            font-size: 22px;
            margin-top: 2px;
        }
        .tip-card strong {
            color: #ffe7b0;
            display: block;
            margin-bottom: 6px;
        }
        .tip-card p {
            color: #ccb98f;
            font-size: 14px;
            margin-bottom: 0;
        }

        /* misc */
        .split-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin: 38px 0;
        }
        .info-pane {
            background: rgba(255, 255, 255, 0.04);
            border-radius: 18px;
            border: 1px solid rgba(255, 255, 255, 0.07);
            overflow: hidden;
        }
        .info-pane img {
            height: 100%;
            min-height: 100%;
            object-fit: cover;
        }
        .image-holder {
            height: 230px;
            background-size: cover;
            background-position: center;
            position: relative;
            display: flex;
            align-items: flex-end;
        }
        .image-holder .image-note {
            font-size: 13px;
            color: #c5d3df;
            background: rgba(7, 23, 34, 0.7);
            padding: 10px 14px;
            width: 100%;
            backdrop-filter: blur(4px);
        }
        .guide-content {
            padding: 26px;
        }
        .guide-content h4 {
            font-size: 20px;
            color: #dfeaf2;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .guide-content .list-divider {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .guide-content .list-divider li {
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            color: #a0b3c2;
            font-size: 14px;
        }
        .guide-content .list-divider li:last-child {
            border-bottom: none;
        }
        .guide-content .list-divider li i {
            margin-right: 10px;
            color: var(--c-accent);
            font-size: 13px;
        }

        /* FAQ block */
        .faq-list {
            max-width: 880px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            border: 1px solid var(--c-border);
            background: rgba(255, 255, 255, 0.03);
            border-radius: 18px;
            transition: border-color 0.25s ease;
            overflow: hidden;
        }
        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            color: #d6e2ec;
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            transition: background 0.2s ease;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .fa {
            font-size: 18px;
            color: var(--c-primary);
            transition: transform 0.2s ease;
        }
        .faq-item[open] {
            border-color: rgba(51, 230, 198, 0.3);
            box-shadow: 0 0 24px rgba(51, 230, 198, 0.04);
        }
        .faq-item[open] summary {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-item[open] summary .fa {
            transform: rotate(45deg);
            color: var(--c-accent);
        }
        .faq-answer {
            padding: 0 24px 20px 24px;
            color: #93a6b6;
            font-size: 14px;
            line-height: 1.8;
        }

        /* CTA zone */
        .cta-zone {
            background: rgba(13, 26, 43, 0.9);
            border: 1px solid var(--c-border);
            border-radius: 28px;
            padding: 44px 40px;
            position: relative;
            overflow: hidden;
            margin: 20px 0 60px;
        }
        .cta-zone::after {
            content: "";
            position: absolute;
            top: -80px;
            right: -60px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(31, 122, 236, 0.3), transparent 70%);
        }
        .cta-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 30px;
            position: relative;
            z-index: 2;
            flex-wrap: wrap;
        }
        .cta-title {
            font-size: 26px;
            color: #fff;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .cta-desc {
            color: #98adbc;
            font-size: 14px;
            max-width: 560px;
        }
        .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* footer */
        .footer {
            background: #071720;
            border-top: 1px solid var(--c-border);
            padding-top: 60px;
            margin-top: 40px;
            position: relative;
            z-index: 2;
        }
        .footer .brand-logo .mark {
            width: 32px;
            height: 32px;
            font-size: 16px;
            border-radius: 8px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 44px;
            padding-bottom: 34px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.045);
        }
        .footer-brand p {
            color: #7e94a7;
            font-size: 14px;
            line-height: 1.8;
            margin-top: 14px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #b6cbd8;
            margin-bottom: 16px;
        }
        .footer-links a,
        .footer-links span {
            display: inline-block;
            color: #6f8495;
            font-size: 14px;
            padding: 6px 0;
        }
        .footer-links a:hover {
            color: var(--c-accent);
        }
        .footer-safe {
            padding: 16px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.045);
            font-size: 13px;
            color: #c7a76e;
            display: flex;
            align-items: center;
            gap: 10px;
            line-height: 1.9;
        }
        .footer-safe i {
            color: var(--c-warn);
        }
        .footer-bottom {
            min-height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            font-size: 13px;
            color: #526879;
            text-align: center;
            padding: 18px 0 24px;
            flex-wrap: wrap;
        }
        .footer-bottom span {
            font-family: 'SF Mono', Consolas, monospace;
        }

        /* mobile */
        @media (max-width: 1024px) {
            .header-grid {
                flex-wrap: wrap;
            }
            .main-nav {
                order: 3;
                width: 100%;
                overflow-x: auto;
                padding: 8px 0 12px;
                gap: 4px;
                scrollbar-width: none;
                -ms-overflow-style: none;
            }
            .main-nav::-webkit-scrollbar {
                display: none;
            }
            .nav-link {
                padding: 8px 14px;
                font-size: 14px;
            }
            .menu-toggle {
                display: none;
            }
            .title-main {
                font-size: 34px;
            }
            .hero-content {
                grid-template-columns: 1fr;
            }
            .process-line {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-visual-row {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 820px) {
            .type-tabs {
                flex-direction: row;
                overflow-x: auto;
                padding-botton: 8px;
                margin-bottom: 14px;
            }
            .type-tab-btn {
                white-space: nowrap;
                padding: 12px 16px;
                min-width: max-content;
            }
            .service-detail-card {
                padding: 22px;
            }
            .split-row,
            .scn-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .block {
                padding: 60px 0;
            }
            .section-title {
                font-size: 28px;
            }
            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 560px) {
            .title-main {
                font-size: 28px;
            }
            .topbar .container {
                font-size: 12px;
            }
            .brand-logo {
                font-size: 17px;
            }
            .brand-logo .mark {
                width: 30px;
                height: 30px;
                font-size: 15px;
            }
            .header-cta .btn-glow {
                padding: 10px 14px;
                font-size: 13px;
            }
            .hero-img-panel {
                padding: 16px;
            }
            .process-line {
                grid-template-columns: 1fr;
            }
            .service-detail ul {
                grid-template-columns: 1fr;
            }
            .faq-item summary {
                padding: 16px;
                font-size: 14px;
            }
            .cta-zone {
                padding: 30px 20px;
            }
        }
        .active {
            color: #fff;
        }

/* roulang page: article */
:root {
            --bg-navy: #071722;
            --bg-deep: #0A1A2F;
            --bg-surface: #0D1A2B;
            --primary: #1F7AEC;
            --accent: #33E6C6;
            --amber: #FFC857;
            --text-main: #E7F0F8;
            --text-muted: #8095A6;
            --border-dim: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.14);
            --card-glass: rgba(255, 255, 255, 0.045);
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-deep: 0 24px 70px rgba(0, 0, 0, 0.38);
            --container-max: 1200px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'HarmonyOS Sans', 'Helvetica Neue', Arial, sans-serif;
            background:
                radial-gradient(1200px 600px at 85% -10%, rgba(31, 122, 236, 0.10), transparent 60%),
                radial-gradient(900px 480px at -10% 20%, rgba(51, 230, 198, 0.06), transparent 55%),
                var(--bg-navy);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font: inherit;
            border: none;
            background: none;
            color: inherit;
            cursor: pointer;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-topbar {
            background: #020C13;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            min-height: 38px;
            display: flex;
            align-items: center;
            font-size: 13px;
        }
        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 14px;
        }
        .topbar-left {
            display: flex;
            align-items: center;
            gap: 14px;
            color: #B7C7D6;
        }
        .topbar-domain {
            font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
            color: #9DD8FF;
            letter-spacing: 0.04em;
            font-size: 13px;
        }
        .topbar-note {
            color: #566D80;
            display: none;
        }
        .topbar-right {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .topbar-ghost {
            color: #Bde9e8;
            border: 1px solid rgba(51, 230, 198, 0.36);
            border-radius: 999px;
            padding: 3px 14px;
            font-size: 12px;
            letter-spacing: 0.03em;
            transition: all 0.25s ease;
        }
        .topbar-ghost:hover {
            background: rgba(51, 230, 198, 0.10);
            border-color: var(--accent);
            color: #fff;
            box-shadow: 0 0 18px rgba(51, 230, 198, 0.22);
        }
        .topbar-link {
            color: #6A8094;
            transition: color 0.2s ease;
        }
        .topbar-link:hover {
            color: #E7F0F8;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(8, 19, 28, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            background: rgba(7, 17, 26, 0.94);
            box-shadow: 0 14px 40px rgba(0, 0, 0, 0.34);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 22px;
            min-height: 72px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-mark {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(145deg, var(--primary), #123C77 90%);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 22px;
            color: #fff;
            box-shadow: 0 0 26px rgba(31, 122, 236, 0.45);
            letter-spacing: 0;
        }
        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.25;
        }
        .brand-name-cn {
            font-weight: 700;
            font-size: 19px;
            letter-spacing: 0.02em;
            color: #F3F8FC;
        }
        .brand-name-cn span {
            color: var(--accent);
            font-weight: 600;
        }
        .brand-sub {
            color: #6A8094;
            font-size: 11px;
            letter-spacing: 0.14em;
            text-transform: none;
            margin-top: 1px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: 18px;
        }
        .nav-link {
            position: relative;
            color: #A9BBCB;
            font-size: 15px;
            font-weight: 500;
            padding: 10px 8px;
            margin: 0 2px;
            border-radius: 8px;
            transition: color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }
        .nav-link:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            color: #fff;
        }
        .nav-link::after {
            content: "";
            position: absolute;
            left: 8px;
            right: 8px;
            bottom: 2px;
            height: 2px;
            border-radius: 99px;
            background: linear-gradient(90deg, #1F7AEC, #33E6C6);
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 0.28s ease;
        }
        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }
        .nav-link.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.03);
            text-shadow: 0 0 16px rgba(51, 230, 198, 0.30);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 15px;
            min-height: 42px;
            padding: 0 20px;
            line-height: 1;
            transition: transform 0.18s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border 0.2s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .btn:active {
            transform: scale(0.98);
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }
        .btn-amber {
            background: linear-gradient(135deg, #FFC857 0%, #F7A824 100%);
            color: #1B1A16;
            box-shadow: 0 10px 32px rgba(255, 200, 87, 0.28);
        }
        .btn-amber:hover {
            box-shadow: 0 14px 40px rgba(255, 200, 87, 0.40);
            transform: translateY(-1px);
        }
        .btn-primary {
            background: linear-gradient(135deg, #1F7AEC 0%, #145BB8 100%);
            color: #fff;
            box-shadow: 0 12px 32px rgba(31, 122, 236, 0.24);
        }
        .btn-primary:hover {
            box-shadow: 0 14px 42px rgba(31, 122, 236, 0.40);
            transform: translateY(-1px);
        }
        .btn-outline {
            border-color: rgba(51, 230, 198, 0.35);
            color: #D6F4F0;
            background: rgba(51, 230, 198, 0.03);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: #fff;
            background: rgba(51, 230, 198, 0.08);
            box-shadow: 0 0 28px rgba(51, 230, 198, 0.15);
        }
        .btn-lg {
            min-height: 54px;
            font-size: 16px;
            border-radius: 14px;
            padding: 0 28px;
        }
        .btn-block {
            width: 100%;
        }
        .header-cta {
            flex-shrink: 0;
        }
        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.14);
            color: #D6E6F2;
            font-size: 20px;
            transition: border 0.2s ease, background 0.2s ease;
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(51, 230, 198, 0.4);
        }

        .article-hero {
            position: relative;
            padding: 64px 0 58px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            background:
                linear-gradient(90deg, rgba(7, 23, 34, 0.95) 0%, rgba(7, 23, 34, 0.74) 55%, rgba(7, 23, 34, 0.42) 100%),
                url('/assets/images/backpic/back-2.webp') center 20% / cover no-repeat;
        }
        .article-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 62%, rgba(7, 23, 34, 0.96) 100%);
            pointer-events: none;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .post-crumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            color: #8FA3B5;
            font-size: 14px;
            margin-bottom: 20px;
        }
        .post-crumb a {
            color: #B6C8D8;
            transition: color 0.2s ease;
        }
        .post-crumb a:hover {
            color: var(--accent);
        }
        .post-crumb i {
            font-size: 10px;
            color: #50677B;
        }
        .post-crumb .crumb-cur {
            color: #DFEDF7;
            max-width: 380px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .post-category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(51, 230, 198, 0.14);
            border: 1px solid rgba(51, 230, 198, 0.30);
            color: #A9F0E4;
            border-radius: 99px;
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.02em;
            margin-bottom: 16px;
        }
        .post-title {
            color: #F4F9FE;
            font-size: 44px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: 0.01em;
            max-width: 850px;
            text-wrap: balance;
        }
        .post-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 18px;
            margin-top: 22px;
            color: #8FA3B5;
            font-size: 14px;
        }
        .post-meta span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }
        .post-meta i {
            color: #5B7A96;
        }

        .article-shell {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 320px;
            gap: 48px;
            padding-top: 56px;
            padding-bottom: 72px;
        }
        .post-article {
            min-width: 0;
        }
        .post-body {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 20px;
            padding: 44px 50px;
            box-shadow: 0 14px 60px rgba(0, 0, 0, 0.18);
        }
        .post-typography {
            font-size: 16px;
            color: #D5E2EC;
            line-height: 2;
        }
        .post-typography h2 {
            color: #F1F7FB;
            font-size: 26px;
            font-weight: 700;
            margin: 36px 0 16px;
            padding-left: 14px;
            border-left: 4px solid var(--accent);
            border-radius: 2px;
            line-height: 1.5;
        }
        .post-typography h3 {
            color: #EBF3F9;
            font-size: 21px;
            font-weight: 600;
            margin: 28px 0 12px;
            line-height: 1.55;
        }
        .post-typography p {
            margin-bottom: 20px;
        }
        .post-typography ul,
        .post-typography ol {
            margin: 0 0 22px 1.55em;
        }
        .post-typography li {
            margin-bottom: 8px;
        }
        .post-typography strong {
            color: #F3F8FD;
            font-weight: 600;
        }
        .post-typography blockquote {
            background: rgba(31, 122, 236, 0.08);
            border-left: 4px solid var(--primary);
            border-radius: 0 14px 14px 0;
            padding: 20px 24px;
            margin: 28px 0;
            color: #DCE9F4;
            font-size: 15px;
        }
        .post-typography img {
            border-radius: 16px;
            margin: 22px 0;
            border: 1px solid rgba(255, 255, 255, 0.07);
        }
        .post-typography code {
            background: rgba(255, 255, 255, 0.08);
            padding: 3px 8px;
            border-radius: 6px;
            font-family: 'JetBrains Mono', ui-monospace, Menlo, monospace;
            font-size: 14px;
        }
        .post-typography a {
            color: #6Fc8ff;
            border-bottom: 1px solid rgba(111, 200, 255, 0.35);
            transition: color 0.2s ease, border-color 0.2s ease;
        }
        .post-typography a:hover {
            color: var(--accent);
            border-color: var(--accent);
        }

        .post-page-nav {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 14px;
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            align-items: stretch;
        }
        .post-nav-box {
            border: 1px solid rgba(255, 255, 255, 0.09);
            background: rgba(255, 255, 255, 0.025);
            border-radius: 14px;
            padding: 16px 18px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            min-width: 0;
            transition: border-color 0.2s ease, background 0.2s ease;
        }
        .post-nav-box:hover {
            border-color: rgba(51, 230, 198, 0.34);
            background: rgba(51, 230, 198, 0.03);
        }
        .post-nav-box small {
            color: #647E91;
            font-size: 12px;
            letter-spacing: 0.04em;
        }
        .post-nav-box span {
            color: #C5D6E3;
            font-size: 14px;
            line-height: 1.6;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .post-nav-index {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: 14px;
            padding: 0 22px;
            color: #B7C9D7;
            font-size: 14px;
            background: rgba(255, 255, 255, 0.02);
            transition: all 0.2s ease;
        }
        .post-nav-index:hover {
            color: #fff;
            border-color: rgba(31, 122, 236, 0.5);
            box-shadow: 0 0 24px rgba(31, 122, 236, 0.15);
        }

        .article-aside {
            display: flex;
            flex-direction: column;
            gap: 20px;
            min-width: 0;
        }
        .aside-card {
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: 18px;
            padding: 22px;
            backdrop-filter: blur(12px);
            box-shadow: 0 10px 34px rgba(0, 0, 0, 0.16);
        }
        .aside-card.entry-card {
            background:
                linear-gradient(150deg, rgba(31, 122, 236, 0.15), rgba(255, 200, 87, 0.08)),
                rgba(255, 255, 255, 0.035);
            border-color: rgba(31, 122, 236, 0.25);
        }
        .aside-title {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 600;
            color: #EDF4FA;
            margin-bottom: 14px;
        }
        .aside-title i {
            width: 30px;
            height: 30px;
            border-radius: 10px;
            background: rgba(51, 230, 198, 0.12);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 14px;
        }
        .aside-text {
            color: #93A8B9;
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .aside-link-list {
            display: flex;
            flex-direction: column;
            gap: 9px;
            margin-top: 12px;
        }
        .aside-item {
            display: flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: 12px;
            padding: 12px 14px;
            color: #C2D2E0;
            font-size: 14px;
            transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
        }
        .aside-item i {
            color: var(--primary);
            width: 22px;
            text-align: center;
        }
        .aside-item:hover {
            transform: translateX(4px);
            border-color: rgba(51, 230, 198, 0.32);
            color: #fff;
        }
        .aside-safe {
            color: #7C93A6;
            font-size: 13px;
            line-height: 1.75;
            background: rgba(255, 200, 87, 0.06);
            border: 1px solid rgba(255, 200, 87, 0.18);
            border-radius: 14px;
            padding: 14px 16px;
            margin-top: 16px;
        }
        .aside-safe i {
            color: var(--amber);
            margin-right: 8px;
        }

        .related-section {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            background:
                radial-gradient(900px 300px at 10% 0%, rgba(31, 122, 236, 0.06), transparent 60%);
            padding: 72px 0 56px;
        }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 34px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: #F1F7FB;
            letter-spacing: 0.01em;
        }
        .section-header h2 span {
            color: var(--accent);
            font-weight: 700;
        }
        .section-sub {
            color: #778FA2;
            font-size: 14px;
            max-width: 560px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .related-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: 18px;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
        }
        .related-card:hover {
            transform: translateY(-5px);
            border-color: rgba(51, 230, 198, 0.35);
            box-shadow: 0 18px 44px rgba(0, 0, 0, 0.30);
            background: rgba(255, 255, 255, 0.06);
        }
        .related-card-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.04);
        }
        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .related-card:hover .related-card-img img {
            transform: scale(1.05);
        }
        .related-card-content {
            padding: 18px;
            display: flex;
            flex: 1;
            flex-direction: column;
            gap: 10px;
        }
        .card-tagline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #8CC9FF;
            background: rgba(31, 122, 236, 0.10);
            border: 1px solid rgba(31, 122, 236, 0.18);
            padding: 4px 12px;
            border-radius: 99px;
            font-size: 12px;
            width: fit-content;
        }
        .related-card-content h3 {
            font-size: 17px;
            font-weight: 600;
            color: #EFF5FA;
            line-height: 1.5;
        }
        .related-card-content p {
            color: #89A0B2;
            font-size: 13px;
            line-height: 1.8;
            margin-bottom: 6px;
        }
        .card-arrow {
            margin-top: auto;
            color: #6A93B5;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color 0.2s ease;
        }
        .related-card:hover .card-arrow {
            color: var(--accent);
        }

        .cta-section {
            padding: 58px 0 80px;
        }
        .cta-wrap {
            background:
                radial-gradient(800px 320px at 80% 10%, rgba(31, 122, 236, 0.22), transparent 60%),
                linear-gradient(135deg, rgba(255, 200, 87, 0.06) 0%, rgba(31, 122, 236, 0.06) 50%, transparent 100%),
                rgba(255, 255, 255, 0.045);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 24px;
            text-align: center;
            padding: 52px 30px;
        }
        .cta-wrap h2 {
            font-size: 32px;
            font-weight: 700;
            color: #F1F7FC;
            margin-bottom: 16px;
        }
        .cta-wrap p {
            color: #92A8BA;
            font-size: 15px;
            max-width: 620px;
            margin: 0 auto 26px;
        }
        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .empty-state {
            min-height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 90px 24px;
            text-align: center;
        }
        .empty-card {
            max-width: 420px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: 20px;
            padding: 44px 32px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
        }
        .empty-card .empty-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            border-radius: 18px;
            background: rgba(255, 200, 87, 0.12);
            border: 1px solid rgba(255, 200, 87, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--amber);
            font-size: 26px;
        }

        .footer {
            background: #05131E;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 60px 0 26px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 50px;
        }
        .footer-brand-s {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 18px;
        }
        .footer-brand-s .brand-mark {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, #1F7AEC, #0A3F77);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 21px;
        }
        .footer-brand-name {
            font-weight: 700;
            font-size: 17px;
            color: #E9F2FA;
            letter-spacing: 0.02em;
        }
        .footer-brand-name span {
            color: var(--accent);
        }
        .footer-brand-desc {
            color: #7891A6;
            font-size: 14px;
            line-height: 1.9;
            max-width: 420px;
        }
        .footer-col-title {
            color: #DCE8F2;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-links {
            display: flex;
            align-items: flex-start;
            flex-direction: column;
            gap: 12px;
            font-size: 14px;
            color: #86A0B4;
            line-height: 1.8;
        }
        .footer-links a {
            transition: color 0.2s ease;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-safe {
            margin-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 16px 0;
            color: #E1C68B;
            background: rgba(255, 200, 87, 0.05);
            font-size: 14px;
            text-align: center;
            display: flex;
            gap: 12px;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            margin-top: 42px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
            padding-top: 22px;
            color: #52707F;
            font-size: 13px;
        }
        .footer-bottom-copy {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        @media (max-width: 1120px) {
            .article-shell {
                grid-template-columns: minmax(0, 1fr) 280px;
                gap: 30px;
            }
            .post-body {
                padding: 34px 28px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }

        @media (max-width: 900px) {
            .header-inner {
                flex-wrap: wrap;
                min-height: auto;
                padding: 14px 0;
            }
            .brand-logo {
                order: 1;
            }
            .menu-toggle {
                order: 3;
                display: inline-flex;
                margin-left: auto;
            }
            .header-cta {
                order: 2;
                display: none;
            }
            .main-nav {
                display: none;
                order: 4;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                margin-left: 0;
                padding-top: 10px;
                border-top: 1px solid rgba(255, 255, 255, 0.07);
                margin-top: 12px;
            }
            .main-nav.open {
                display: flex;
            }
            .nav-link {
                padding: 13px 6px;
                border-radius: 10px;
                font-size: 16px;
            }
            .article-shell {
                grid-template-columns: 1fr;
                padding-top: 32px;
            }
            .article-aside {
                display: grid;
                grid-template-columns: 1fr 1fr;
            }
            .post-page-nav {
                grid-template-columns: 1fr;
            }
            .post-nav-index {
                min-height: 50px;
                order: -1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .topbar-note {
                display: none;
            }
            .topbar-ghost {
                padding: 4px 10px;
                font-size: 12px;
            }
            .post-title {
                font-size: 28px;
            }
            .post-crumb .crumb-cur {
                max-width: 180px;
            }
            .post-body {
                padding: 24px 18px;
                border-radius: 14px;
            }
            .post-typography {
                font-size: 15px;
                line-height: 1.95;
            }
            .post-typography h2 {
                font-size: 20px;
            }
            .post-typography h3 {
                font-size: 18px;
            }
            .article-aside {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .cta-wrap {
                padding: 34px 18px;
            }
            .cta-wrap h2 {
                font-size: 25px;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                justify-content: center;
                text-align: center;
            }
        }

        @media (max-width: 400px) {
            .site-header .brand-mark {
                width: 36px;
                height: 36px;
                font-size: 18px;
            }
            .brand-name-cn {
                font-size: 17px;
            }
        }

/* roulang page: category2 */
:root {
  --bg-deep: #071722;
  --bg-main: #0a1a2f;
  --bg-soft: #0d1a2b;
  --primary: #1F7AEC;
  --accent: #33E6C6;
  --warn: #FFC857;
  --text: #e9f2fa;
  --muted: #88a0b3;
  --dark-line: rgba(255, 255, 255, .12);
  --card-bg: rgba(255, 255, 255, .05);
  --radius-lg: 20px;
  --radius-md: 12px;
  --shadow-glow: 0 10px 40px rgba(31, 122, 236, .28);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.block-spacing {
  padding-top: 96px;
  padding-bottom: 96px;
}
@media (max-width: 768px) {
  .block-spacing { padding-top: 64px; padding-bottom: 64px; }
}
.topbar {
  background: #041019;
  color: #9db2c3;
  font-size: 13px;
  border-bottom: 1px solid rgba(255, 255, 255, .05);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 38px;
}
.domain-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .1em;
  font-weight: 500;
  color: #a5bacb;
}
.topbar-entry {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  line-height: 1;
  padding: 7px 16px;
  border: 1px solid rgba(255, 255, 255, .24);
  border-radius: 999px;
  color: #dceaf5;
  transition: all .25s ease;
}
.topbar-entry:hover,
.topbar-entry:focus-visible {
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 14px rgba(51, 230, 198, .25);
}
.nav-shell {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(7, 23, 34, .72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  transition: background .35s ease, box-shadow .35s ease;
}
.nav-shell.scrolled {
  background: rgba(6, 19, 30, .94);
  box-shadow: 0 12px 36px rgba(0, 0, 0, .35);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 20px;
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}
.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, #1F7AEC, #2568b9 60%, #33E6C6 150%);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  box-shadow: 0 6px 18px rgba(31, 122, 236, .38);
}
.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #f1f6fb;
  letter-spacing: .02em;
}
.brand-name .brand-sub {
  color: var(--accent);
  font-weight: 600;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 18px;
  border-radius: 10px;
  font-size: 15px;
  color: #b9cad8;
  transition: color .25s, background .25s, box-shadow .25s;
  position: relative;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 4px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .3s ease;
  border-radius: 2px;
}
.nav-link:hover,
.nav-link:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, .04);
}
.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link.active::after {
  transform: scaleX(1);
}
.nav-link.active {
  color: #fff;
  background: rgba(31, 122, 236, .18);
  box-shadow: inset 0 0 0 1px rgba(51, 230, 198, .12);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn-glow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(120deg, #1F7AEC, #33A8D6);
  padding: 11px 22px;
  font-size: 15px;
  border: 1px solid rgba(255, 255, 255, .12);
  box-shadow: 0 8px 26px rgba(31, 122, 236, .35);
  transition: transform .22s, box-shadow .22s, background .22s;
}
.btn-glow:hover, .btn-glow:focus-visible {
  background: linear-gradient(120deg, #2f8cff, #33c8aa);
  box-shadow: 0 10px 32px rgba(51, 230, 198, .3), 0 8px 22px rgba(31, 122, 236, .35);
  transform: translateY(-1px);
}
.btn-glow:active { transform: scale(.98); }
.btn-glow.small { min-height: 44px; padding: 9px 18px; font-size: 14px; }
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 12px;
  padding: 10px;
}
.menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: #d7e4ef;
  transition: transform .28s, opacity .2s;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.cat-hero {
  position: relative;
  padding: 90px 0 70px;
  background:
    linear-gradient(90deg, rgba(7, 23, 34, .95) 0%, rgba(7, 23, 34, .72) 48%, rgba(7, 23, 34, .62) 100%),
    url('/assets/images/backpic/back-2.webp') center 25% / cover no-repeat;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.cat-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, .8fr);
  gap: 56px;
  align-items: center;
}
.cat-hero .tag-pill.amber {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 200, 87, .13);
  border: 1px solid rgba(255, 200, 87, .35);
  border-radius: 999px;
  color: #FFC857;
  font-size: 13px;
  padding: 6px 14px;
  margin-bottom: 20px;
}
.cat-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(38px, 5vw, 54px);
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: .02em;
  color: #f4f9fd;
}
.cat-hero h1 span {
  color: var(--accent);
}
.cat-hero .hero-sub {
  font-size: 17px;
  line-height: 2;
  color: #c0d0dd;
  max-width: 600px;
  margin-bottom: 30px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  background: linear-gradient(120deg, #1F7AEC, #268fca);
  color: #fff;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, .14);
  box-shadow: 0 8px 26px rgba(31, 122, 236, .35);
  transition: transform .22s, box-shadow .22s, background .22s;
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: linear-gradient(120deg, #2c88ff, #2fbfdc);
  box-shadow: 0 0 0 1px rgba(51, 230, 198, .4), 0 10px 34px rgba(31, 122, 236, .45);
  transform: translateY(-2px);
}
.btn-primary:active { transform: scale(.97); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  color: #c8d9e6;
  border: 1px solid rgba(255, 255, 255, .22);
  background: rgba(255, 255, 255, .04);
  backdrop-filter: blur(8px);
  transition: border-color .25s, background .25s, color .25s, transform .2s;
}
.btn-secondary:hover, .btn-secondary:focus-visible {
  border-color: rgba(51, 230, 198, .6);
  color: #fff;
  background: rgba(51, 230, 198, .08);
  transform: translateY(-1px);
}
.btn-secondary:active { transform: scale(.98); }
.cat-hero-panel {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .14);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 26px 70px rgba(0, 0, 0, .32);
}
.cat-hero-panel img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.panel-caption {
  padding: 18px 20px;
  font-size: 14px;
  color: #c4d5e1;
  display: flex;
  align-items: center;
  gap: 8px;
}
.panel-caption::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 14px rgba(51, 230, 198, .75);
}

.toc-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}
.toc-side {
  position: sticky;
  top: 120px;
}
.toc-card {
  background: rgba(255, 255, 255, .045);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 18px;
  padding: 18px;
}
.toc-side .toc-card { display: flex; flex-direction: column; }
.toc-title {
  font-size: 13px;
  color: #8ea5b5;
  letter-spacing: .18em;
  padding: 0 8px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  margin-bottom: 10px;
}
.toc-card a {
  display: block;
  font-size: 15px;
  color: #aec1cf;
  padding: 10px 12px;
  border-radius: 10px;
  border-left: 2px solid transparent;
  transition: color .2s, background .2s, border-color .2s;
}
.toc-card a:hover,
.toc-card a:focus-visible,
.toc-card a.active {
  background: rgba(31, 122, 236, .15);
  color: #fff;
  border-left-color: var(--accent);
}
.main-content {
  min-width: 0;
}
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-kicker::before {
  content: "";
  width: 32px;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.main-content h2 {
  font-size: clamp(26px, 3vw, 32px);
  line-height: 1.4;
  margin: 0 0 16px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .01em;
}
.main-content h3 {
  font-size: 21px;
  font-weight: 600;
  margin: 0 0 12px;
  color: #fff;
}
.section-quote {
  font-size: 17px;
  line-height: 2;
  color: #c1d2df;
  margin-bottom: 28px;
}
.split-row {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr);
  gap: 44px;
  align-items: center;
}
.feature-list li {
  position: relative;
  padding: 14px 0 14px 28px;
  border-bottom: 1px solid rgba(255, 255, 255, .06);
  font-size: 15px;
  color: #c7d6e2;
}
.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 25px;
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: linear-gradient(135deg, #1F7AEC, #33E6C6);
  box-shadow: 0 0 10px rgba(51, 230, 198, .3);
}
.feature-list li strong {
  display: block;
  color: #fff;
  font-size: 16px;
  margin-bottom: 2px;
}
.split-media {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .12);
  box-shadow: 0 26px 60px rgba(0, 0, 0, .25);
}
.split-media img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
}

.section-soft {
  background: linear-gradient(180deg, #0a1a2f 0%, #0d1e36 100%);
  border-top: 1px solid rgba(255, 255, 255, .06);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.info-stack {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 34px;
}
.info-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) minmax(220px, 320px);
  gap: 24px;
  align-items: center;
  padding: 26px 0;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.info-item:last-child {
  border-bottom: none;
}
.info-num {
  font-size: 30px;
  font-weight: 700;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: rgba(255, 255, 255, .16);
  line-height: 1;
  letter-spacing: -.04em;
}
.info-text p {
  margin: 0 0 8px;
  color: #b9cad8;
  font-size: 15px;
  line-height: 1.9;
}
.info-media {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .12);
}
.info-media img {
  width: 100%;
  height: 150px;
  object-fit: cover;
}
.tag-pill {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  line-height: 1;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(121, 169, 203, .16);
  border: 1px solid rgba(255, 255, 255, .12);
  color: #b3cada;
  font-weight: 500;
}
.tag-pill.brand {
  background: rgba(31, 122, 236, .16);
  border-color: rgba(51, 230, 198, .25);
  color: #8dd4e8;
}

.timeline {
  margin: 32px 0 0;
  position: relative;
  padding-left: 28px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 20px;
  width: 2px;
  background: linear-gradient(180deg, #33E6C6, #1F7AEC);
  border-radius: 2px;
}
.timeline li {
  position: relative;
  padding: 0 0 30px 24px;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 9px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: #0a1a2f;
  border: 3px solid var(--accent);
  box-shadow: 0 0 0 5px rgba(51, 230, 198, .12);
}
.timeline li:last-child {
  padding-bottom: 0;
}
.timeline-step {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.timeline-step b {
  color: #fff;
  font-size: 17px;
}
.timeline-step span {
  font-size: 13px;
  color: #8ea5b5;
}
.timeline li p {
  margin: 4px 0 0;
  color: #b9cad8;
  font-size: 15px;
  line-height: 1.9;
}

.check-panel {
  background:
    linear-gradient(135deg, rgba(31, 122, 236, .12), rgba(51, 230, 198, .05)),
    rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .13);
  border-radius: 20px;
  padding: 34px 30px 22px;
  margin-top: 20px;
  backdrop-filter: blur(10px);
}
.check-title {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #FFC857;
  font-weight: 600;
  font-size: 17px;
  margin-bottom: 18px;
}
.check-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 12px 0;
  color: #d2dfe9;
  font-size: 15px;
  line-height: 1.8;
  border-bottom: 1px dashed rgba(255, 255, 255, .09);
}
.check-list li:last-child { border-bottom: none; }
.check-list li::before {
  content: "";
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 4px;
  border-radius: 50%;
  background: radial-gradient(circle, #33E6C6, #1F7AEC);
  box-shadow: 0 0 10px rgba(51, 230, 198, .3);
  position: relative;
}
.check-list li::after {
  content: "";
  position: relative;
  flex: 0 0 auto;
  width: 6px;
  height: 10px;
  margin-left: -17px;
  margin-top: 7px;
  border-bottom: 2px solid #06151f;
  border-right: 2px solid #06151f;
  transform: rotate(45deg);
}

.faq-list {
  margin-top: 30px;
}
.faq-item {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .3s, box-shadow .3s, background .3s;
}
.faq-item.open {
  border-color: rgba(51, 230, 198, .4);
  box-shadow: 0 0 0 1px rgba(51, 230, 198, .12), 0 16px 40px rgba(0, 0, 0, .2);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  background: transparent;
  border: none;
  color: #e8f1f8;
  font-size: 16px;
  text-align: left;
  font-weight: 500;
  min-height: 60px;
  transition: color .2s;
}
.faq-q:hover { color: #fff; }
.faq-q .faq-icon {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .22);
  position: relative;
  transition: transform .25s, border-color .25s, background .25s;
}
.faq-q .faq-icon::before,
.faq-q .faq-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 2px;
  background: #a9becb;
  transform: translate(-50%, -50%);
  border-radius: 2px;
  transition: background .25s, transform .25s;
}
.faq-q .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}
.faq-item.open .faq-icon {
  border-color: var(--accent);
  transform: rotate(180deg);
}
.faq-item.open .faq-icon::before {
  background: var(--accent);
}
.faq-item.open .faq-icon::after {
  background: var(--accent);
  transform: translate(-50%, -50%) rotate(0deg);
}
.faq-a-wrap {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-a {
  padding: 0 22px 20px;
  color: #b9cad8;
  font-size: 15px;
  line-height: 1.9;
  border-top: 1px solid rgba(255, 255, 255, .06);
  padding-top: 16px;
  margin: 0 0 0;
}

.cta-final {
  position: relative;
  padding: 100px 0;
  background:
    linear-gradient(rgba(5, 18, 28, .88), rgba(5, 18, 28, .94)),
    url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  border-top: 1px solid rgba(255, 255, 255, .08);
  text-align: center;
}
.cta-final h2 {
  font-size: clamp(30px, 4vw, 42px);
  margin: 0 0 18px;
  font-weight: 700;
}
.cta-final p {
  font-size: 17px;
  color: #bcd2df;
  max-width: 680px;
  margin: 0 auto 30px;
}
.cta-btns {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.footer {
  background: #041019;
  border-top: 1px solid rgba(255, 255, 255, .06);
  padding-top: 56px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr .9fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer .brand-logo { margin-bottom: 16px; }
.footer-brand p {
  color: #8198a9;
  font-size: 14px;
  line-height: 1.9;
  max-width: 360px;
}
.footer-col h4 {
  color: #d6e2eb;
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-links a {
  color: #93a9b9;
  font-size: 14px;
  padding: 4px 0;
  transition: color .2s, padding-left .2s;
}
.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent);
  padding-left: 6px;
}
.footer-safe {
  background: rgba(255, 200, 87, .08);
  border: 1px solid rgba(255, 200, 87, .22);
  border-radius: 12px;
  padding: 14px 18px;
  color: #e9cf94;
  font-size: 13px;
  margin-bottom: 20px;
}
.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  border-top: 1px solid rgba(255, 255, 255, .05);
  padding: 20px 0;
  font-size: 13px;
  color: #5d7a8e;
}
.footer-note { color: #527084; font-size: 12px; }
.copyright span { color: #6e8fa4; }

@media (max-width: 1024px) {
  .cat-hero-inner {
    grid-template-columns: 1fr;
    gap: 34px;
  }
  .cat-hero-panel { max-width: 560px; }
  .toc-layout { grid-template-columns: 1fr; gap: 12px; }
  .toc-side { position: static; top: auto; }
  .toc-card {
    display: flex;
    flex-wrap: nowrap;
    gap: 6px;
    overflow-x: auto;
    padding: 12px;
  }
  .toc-title { display: none; }
  .toc-card a {
    white-space: nowrap;
    font-size: 14px;
    padding: 8px 14px;
  }
  .split-row {
    grid-template-columns: 1fr;
  }
  .info-item {
    grid-template-columns: 52px 1fr;
    gap: 14px;
  }
  .info-media { grid-column: 1 / -1; }
  .info-media img { height: 220px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .main-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: rgba(6, 18, 29, .98);
    border-bottom: 1px solid rgba(255, 255, 255, .08);
    padding: 14px 20px 20px;
    box-shadow: 0 26px 40px rgba(0, 0, 0, .4);
    display: none;
  }
  .main-nav.open { display: flex; }
  .nav-link { font-size: 16px; padding: 12px 14px; border-radius: 12px; }
  .nav-link::after { display: none; }
  .nav-link.active {
    background: rgba(31, 122, 236, .22);
  }
  .nav-actions .btn-glow { display: none; }
  .nav-shell { background: rgba(7, 23, 34, .94); }
  .hero-actions .btn-primary, .hero-actions .btn-secondary { width: 100%; }
  .cat-hero { padding: 60px 0 54px; }
  .block-spacing { padding-top: 56px; padding-bottom: 56px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { align-items: flex-start; text-align: left; }
  .footer-bottom .footer-note { text-align: left; }
}
@media (max-width: 520px) {
  .brand-name { font-size: 17px; }
  .brand-mark { width: 36px; height: 36px; font-size: 20px; }
  .topbar-inner { font-size: 12px; }
  .topbar-entry { font-size: 12px; padding: 6px 12px; }
  .cat-hero h1 { font-size: 32px; }
  .feature-list li { padding-left: 24px; }
  .feature-list li::before { top: 21px; width: 12px; height: 12px; }
  .faq-q { font-size: 15px; padding: 16px; }
  .cta-btns a { width: 100%; }
}

/* roulang page: category3 */
:root {
            --bg-deep: #06121f;
            --bg-soft: #0b1d2e;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-light: rgba(255, 255, 255, 0.075);
            --line-soft: rgba(255, 255, 255, 0.12);
            --line-glow: rgba(51, 230, 198, 0.45);
            --primary: #1F7AEC;
            --accent: #33E6C6;
            --amber: #FFC857;
            --text-head: #eef7ff;
            --text-body: #c2d2e0;
            --text-weak: #8095a6;
            --radius-card: 20px;
            --radius-btn: 12px;
            --shadow-lg: 0 26px 70px rgba(0, 0, 0, 0.45);
            --max-width: 1200px;
            --section-gap: 110px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans", "Segoe UI", sans-serif;
            background: var(--bg-deep);
            color: var(--text-body);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            background:
                radial-gradient(circle at 15% 10%, rgba(31, 122, 236, 0.12), transparent 28%),
                radial-gradient(circle at 85% 90%, rgba(51, 230, 198, 0.08), transparent 24%),
                linear-gradient(180deg, #08131f 0%, #06101c 100%);
            pointer-events: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, opacity 0.2s ease, transform 0.2s ease;
        }
        button {
            font: inherit;
            cursor: pointer;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: 88px 0;
            position: relative;
        }
        .section.soft {
            background: linear-gradient(180deg, rgba(13, 26, 43, 0.42), rgba(6, 18, 31, 0.92));
        }
        .section-offset {
            padding-top: 70px;
            padding-bottom: 70px;
        }
        .section-head {
            max-width: 780px;
            margin-bottom: 48px;
        }
        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .eyebrow::before {
            content: "";
            width: 26px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
        }
        h1,
        h2,
        h3,
        h4 {
            color: var(--text-head);
            font-weight: 700;
            line-height: 1.35;
        }
        h2 {
            font-size: clamp(28px, 3vw, 38px);
            letter-spacing: 0.01em;
        }
        h3 {
            font-size: 22px;
        }
        .section-head p {
            margin-top: 14px;
            font-size: 16px;
            line-height: 1.9;
        }

        /* 顶部信息条 */
        .topbar {
            background: #040c15;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            min-height: 40px;
            display: flex;
            align-items: center;
        }
        .topbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .topbar-domain {
            font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
            font-size: 13px;
            color: rgba(128, 149, 166, 0.8);
            letter-spacing: 0.04em;
        }
        .topbar-domain span {
            color: var(--accent);
        }
        .topbar-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            padding: 5px 14px;
            border: 1px solid rgba(51, 230, 198, 0.45);
            color: #d6f8f0;
            border-radius: 999px;
            background: transparent;
            transition: all 0.2s ease;
        }
        .topbar-btn:hover {
            background: rgba(51, 230, 198, 0.12);
            border-color: var(--accent);
            box-shadow: 0 0 16px rgba(51, 230, 198, 0.18);
        }

        /* 导航 */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 80;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            background: rgba(7, 18, 29, 0.72);
            border-bottom: 1px solid rgba(255, 255, 255, 0.09);
            transition: background 0.25s ease, box-shadow 0.25s ease;
        }
        .site-nav.scrolled {
            background: rgba(6, 14, 23, 0.88);
            box-shadow: 0 12px 38px rgba(0, 0, 0, 0.35);
        }
        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 78px;
            gap: 18px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-mark {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 8px 24px rgba(31, 122, 236, 0.35);
        }
        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: #f0fbff;
            letter-spacing: 0.02em;
        }
        .brand-text em {
            font-style: normal;
            font-size: 13px;
            color: var(--accent);
            background: rgba(51, 230, 198, 0.12);
            border: 1px solid rgba(51, 230, 198, 0.22);
            padding: 2px 8px;
            border-radius: 999px;
            margin-left: 6px;
            vertical-align: 2px;
            font-weight: 600;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-link {
            position: relative;
            padding: 12px 14px;
            color: rgba(210, 228, 241, 0.72);
            font-size: 15px;
            font-weight: 500;
            border-radius: 10px;
            transition: background 0.2s ease, color 0.2s ease;
        }
        .nav-link:hover {
            color: var(--text-head);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-link.active {
            color: #fff;
        }
        .nav-link.active::after,
        .nav-link:hover::after {
            content: "";
            position: absolute;
            left: 12px;
            right: 12px;
            bottom: 5px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 3px;
            box-shadow: 0 0 14px rgba(51, 230, 198, 0.5);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 12px 26px;
            border: 1px solid transparent;
            transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
        }
        .btn:active {
            transform: scale(0.98);
        }
        .btn:focus-visible,
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }
        .btn-glow {
            background: linear-gradient(135deg, var(--primary), #2b9bec);
            color: #fff !important;
            box-shadow: 0 10px 28px rgba(31, 122, 236, 0.36);
        }
        .btn-glow:hover {
            box-shadow: 0 0 0 1px rgba(51, 230, 198, 0.2), 0 12px 34px rgba(31, 122, 236, 0.5);
            background: linear-gradient(135deg, #2795f2, #35d3bd);
            transform: translateY(-1px);
        }
        .btn-amber {
            background: linear-gradient(135deg, #ff9d35, var(--amber));
            color: #201300 !important;
            box-shadow: 0 12px 30px rgba(255, 200, 87, 0.25);
        }
        .btn-amber:hover {
            box-shadow: 0 10px 30px rgba(255, 200, 87, 0.45);
            transform: translateY(-2px);
        }
        .btn-ghost {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.25);
            color: var(--text-head);
        }
        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: 0 0 24px rgba(51, 230, 198, 0.16);
        }
        .menu-toggle {
            display: none;
            width: 46px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 10px;
            color: #fff;
            font-size: 20px;
        }

        /* 页面 Hero */
        .page-hero {
            position: relative;
            padding: 90px 0 110px;
            background-image: linear-gradient(90deg, rgba(7, 19, 31, 0.92), rgba(7, 19, 31, 0.62)), url('/assets/images/backpic/back-2.webp');
            background-position: 70% 30%, center;
            background-size: cover;
            background-repeat: no-repeat;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .page-hero::after {
            content: "";
            position: absolute;
            left: -100px;
            bottom: -60px;
            width: 420px;
            height: 240px;
            background: radial-gradient(circle, rgba(31, 122, 236, 0.15), transparent 70%);
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
            gap: 56px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .hero-breadcrumb {
            font-size: 14px;
            margin-bottom: 16px;
            color: var(--text-weak);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .hero-breadcrumb a:hover {
            color: var(--accent);
        }
        .page-hero h1 {
            font-size: clamp(34px, 4.6vw, 56px);
            line-height: 1.25;
            letter-spacing: 0.02em;
            max-width: 680px;
            text-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
        }
        .page-hero h1 .gradient-word {
            background: linear-gradient(135deg, #9fd8ff, var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .page-hero-sub {
            margin: 22px 0 32px;
            max-width: 620px;
            font-size: 17px;
            line-height: 2;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .hero-card {
            background: rgba(8, 18, 29, 0.55);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 24px;
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            padding: 28px 24px;
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.38);
            position: relative;
            overflow: hidden;
        }
        .hero-card::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -70px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(51, 230, 198, 0.24), transparent 65%);
        }
        .hero-card h4 {
            font-size: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: #fff;
            margin-bottom: 14px;
        }
        .hero-card-list {
            display: grid;
            gap: 10px;
        }
        .hero-card-list li {
            list-style: none;
            font-size: 15px;
            display: flex;
            gap: 10px;
            align-items: flex-start;
            color: #cfdbe7;
            padding: 8px 0;
            border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
        }
        .hero-card-list i {
            color: var(--accent);
            font-style: normal;
            font-weight: 700;
        }
        .hero-card .card-enter {
            margin-top: 18px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--amber);
        }

        /* 信息标签行 */
        .tile-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
            margin-top: -56px;
            position: relative;
            z-index: 5;
        }
        .tile-item {
            background: rgba(16, 28, 42, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 18px;
            padding: 22px 20px;
            backdrop-filter: blur(16px);
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
        }
        .tile-item strong {
            display: block;
            font-size: 24px;
            font-feature-settings: "tnum";
            color: var(--accent);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .tile-item span {
            font-size: 15px;
            color: #ccdbe8;
        }

        /* 双列图文 */
        .split-panel {
            display: grid;
            grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
            gap: 70px;
            align-items: center;
            margin-bottom: 40px;
        }
        .split-panel.reverse .media-col {
            order: 0;
        }
        .split-panel.reverse .text-col {
            order: 1;
        }
        .split-panel + .split-panel {
            margin-top: 80px;
        }
        .text-col .feature-list {
            display: grid;
            gap: 14px;
            margin-top: 24px;
        }
        .feature-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            list-style: none;
            padding: 14px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-left: 3px solid var(--accent);
            border-radius: 10px;
            font-size: 15px;
        }
        .feature-list li strong {
            color: var(--text-head);
            font-weight: 600;
        }
        .text-col h2,
        .text-col h3 {
            margin-bottom: 14px;
        }
        .text-col p {
            margin-bottom: 10px;
        }
        .media-col {
            position: relative;
        }
        .media-col.offset-up {
            transform: translateY(-14px);
        }
        .media-img {
            border-radius: 22px;
            width: 100%;
            object-fit: cover;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 28px 70px rgba(0, 0, 0, 0.35);
        }
        .media-col::after {
            content: "";
            position: absolute;
            inset: auto -14px -14px auto;
            width: 60%;
            height: 60%;
            background: linear-gradient(135deg, transparent, rgba(31, 122, 236, 0.14));
            border-radius: 24px;
            z-index: -1;
            pointer-events: none;
        }

        .note-wrap {
            margin-top: 26px;
            padding: 20px 22px;
            border-radius: 16px;
            border: 1px solid rgba(255, 200, 87, 0.3);
            background: rgba(255, 200, 87, 0.07);
            color: #eadcb9;
        }

        /* 步骤导图 */
        .step-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }
        .step-node {
            position: relative;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 18px;
            padding: 26px 20px;
            min-height: 220px;
        }
        .step-node::before {
            content: "";
            position: absolute;
            top: 30px;
            right: -10px;
            width: 22px;
            height: 1px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }
        .step-node:last-child::before {
            display: none;
        }
        .step-no {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #032a3a;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            margin-bottom: 18px;
        }
        .step-node h3 {
            margin-bottom: 10px;
            font-size: 17px;
        }
        .step-node p {
            font-size: 15px;
            line-height: 1.8;
        }

        /* 不对称信息卡 */
        .offset-pair {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 28px;
            align-items: start;
        }
        .offset-card {
            background: rgba(12, 23, 36, 0.82);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 24px;
            padding: 34px;
            backdrop-filter: blur(14px);
        }
        .offset-card.bump-up {
            transform: translateY(-32px);
        }
        .offset-card.tag {
            border-top: 4px solid var(--accent);
        }
        .offset-card.warn {
            border-left: 4px solid var(--amber);
        }
        .offset-card h3 {
            font-size: 23px;
        }
        .offset-card ul {
            margin-top: 16px;
            display: grid;
            gap: 12px;
        }
        .offset-card li {
            list-style: none;
            position: relative;
            padding-left: 24px;
            font-size: 15px;
            line-height: 1.8;
        }
        .offset-card li::before {
            content: "↳";
            position: absolute;
            left: 0;
            color: var(--accent);
            font-weight: 700;
        }
        .offset-card.warn li::before {
            content: "!";
            color: var(--amber);
            font-weight: 800;
        }

        /* FAQ 手风琴 */
        .faq-wrap {
            max-width: 880px;
            margin-top: 36px;
        }
        .faq-item {
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 16px;
            margin-bottom: 12px;
            background: rgba(9, 20, 32, 0.75);
            overflow: hidden;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .faq-item.open {
            border-color: rgba(51, 230, 198, 0.4);
            box-shadow: 0 0 30px rgba(51, 230, 198, 0.08), 0 20px 40px rgba(0, 0, 0, 0.2);
        }
        .faq-q {
            width: 100%;
            background: transparent;
            border: none;
            color: #dcebf7 !important;
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 0;
            outline: none;
        }
        .faq-q .badge-line {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .faq-icon {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.25);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            transition: transform 0.2s ease, background 0.2s ease;
        }
        .faq-item.open .faq-icon {
            background: var(--accent);
            color: #04313a;
            transform: rotate(45deg);
        }
        .faq-a {
            display: none;
            padding: 0 24px 22px 70px;
            color: #b1c6d8;
            font-size: 15px;
            line-height: 2;
        }
        .faq-item.open .faq-a {
            display: block;
            animation: faqIn 0.2s ease;
        }
        @keyframes faqIn {
            from {
                opacity: 0;
                transform: translateY(-4px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(31, 122, 236, 0.16), rgba(51, 230, 198, 0.1));
            border-radius: 28px;
            padding: 64px 56px;
            text-align: center;
            border: 1px solid rgba(51, 230, 198, 0.2);
            position: relative;
            overflow: hidden;
            margin: 0 24px;
        }
        .cta-section h2 {
            font-size: clamp(26px, 3vw, 40px);
        }
        .cta-section p {
            max-width: 620px;
            margin: 16px auto 30px;
            font-size: 17px;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        /* footer 沿用首页样式 */
        .footer {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            background: rgba(4, 11, 19, 0.65);
            padding-top: 68px;
            margin-top: 96px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.3fr 0.75fr 1fr;
            gap: 48px;
            padding-bottom: 42px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-logo {
            display: inline-flex;
            margin-bottom: 18px;
            color: #fff;
            font-weight: 800;
        }
        .brand-logo .mark {
            margin-right: 6px;
        }
        .footer-brand p {
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.9;
            max-width: 390px;
        }
        .footer-col h4 {
            color: var(--text-head);
            font-size: 17px;
            margin-bottom: 16px;
        }
        .footer-links {
            display: grid;
            gap: 10px;
        }
        .footer-links a {
            color: #a2b7c7;
            font-size: 15px;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-safe {
            margin: 28px 0;
            border-radius: 14px;
            padding: 16px 22px;
            background: rgba(31, 122, 236, 0.08);
            border: 1px solid rgba(31, 122, 236, 0.24);
            text-align: center;
            color: #b9d2e5;
            font-size: 15px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            padding: 22px 0 28px;
            color: var(--text-weak);
            font-size: 14px;
            flex-wrap: wrap;
        }
        .footer-note {
            font-size: 13px;
            opacity: 0.8;
        }

        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .tile-strip {
                grid-template-columns: repeat(2, 1fr);
                margin-top: 40px;
            }
            .split-panel {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .offset-pair {
                grid-template-columns: 1fr;
            }
            .offset-card.bump-up {
                transform: none;
            }
            .step-flow {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-node::before {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .main-nav {
                position: fixed;
                top: 40px;
                left: 0;
                width: 100%;
                height: auto;
                max-height: calc(100vh - 120px);
                overflow-y: auto;
                background: rgba(5, 13, 22, 0.97);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 18px 20px;
                display: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.14);
                box-shadow: 0 30px 50px rgba(0, 0, 0, 0.5);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav .nav-link {
                padding: 14px 14px;
                border-radius: 10px;
                font-size: 16px;
            }
            .nav-link.active::after {
                bottom: auto;
                top: 10px;
                left: 4px;
                width: 4px;
                height: auto;
                bottom: 10px;
            }
            .nav-actions {
                margin-left: auto;
            }
            .menu-toggle {
                display: inline-flex;
            }
            .nav-cta {
                display: none;
            }
        }

        @media (max-width: 768px) {
            body {
                font-size: 15px;
            }
            .section {
                padding: 62px 0;
            }
            .topbar .topbar-btn span {
                display: none;
            }
            .brand-text {
                font-size: 18px;
            }
            .brand-text em {
                font-size: 12px;
                margin-left: 4px;
                padding: 2px 6px;
            }
            .page-hero {
                padding: 60px 0 74px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .tile-strip {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .tile-item {
                padding: 18px 16px;
            }
            .tile-item strong {
                font-size: 20px;
            }
            .faq-q {
                padding: 16px;
                font-size: 15px;
            }
            .faq-a {
                padding: 0 16px 18px 54px;
            }
            .cta-section {
                padding: 46px 24px;
                margin: 0 16px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .media-col.offset-up {
                transform: none;
            }
        }

        @media (max-width: 520px) {
            .tile-strip {
                grid-template-columns: 1fr;
            }
            .step-flow {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 50px 0;
            }
            .navbar {
                min-height: 70px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .topbar-domain {
                font-size: 12px;
            }
        }