/* roulang page: index */
:root {
            --ink: #071622;
            --ink-soft: #0d2433;
            --ocean: #103b51;
            --aqua: #13d8c4;
            --aqua-soft: #8af4e8;
            --lime: #b9ef56;
            --gold: #f7c95d;
            --coral: #ff806b;
            --paper: #f4fbfa;
            --white: #ffffff;
            --muted: #9db5bb;
            --muted-dark: #58717a;
            --line: rgba(127, 220, 213, .19);
            --line-light: #d9ebe8;
            --radius-lg: 28px;
            --radius-md: 18px;
            --radius-sm: 12px;
            --shadow: 0 22px 60px rgba(2, 21, 31, .17);
            --shadow-soft: 0 10px 30px rgba(3, 32, 43, .09);
            --ease: cubic-bezier(.2, .8, .2, 1);
        }

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

        html { scroll-behavior: smooth; }

        body {
            margin: 0;
            color: var(--ink);
            background: var(--paper);
            font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            font-size: 16px;
            line-height: 1.62;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
        }

        button, input, select { font: inherit; }
        button { cursor: pointer; }
        img { max-width: 100%; display: block; }
        p { margin: 0 0 1rem; }
        h1, h2, h3, h4 { margin: 0; line-height: 1.15; letter-spacing: -.035em; }
        ul { margin: 0; padding: 0; list-style: none; }

        .container {
            width: min(1180px, calc(100% - 40px));
            margin: 0 auto;
        }

        .site-header {
            position: fixed;
            z-index: 1000;
            top: 0;
            right: 0;
            left: 0;
            background: rgba(7, 22, 34, .87);
            border-bottom: 1px solid rgba(138, 244, 232, .12);
            backdrop-filter: blur(18px);
        }

        .nav-shell {
            min-height: 78px;
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            color: var(--white);
            font-weight: 800;
            font-size: 15px;
            letter-spacing: -.02em;
            line-height: 1.1;
            max-width: 220px;
        }

        .brand-mark {
            width: 39px;
            height: 39px;
            flex: 0 0 39px;
            display: grid;
            place-items: center;
            color: var(--ink);
            background: linear-gradient(145deg, var(--aqua-soft), var(--aqua));
            border-radius: 13px 13px 13px 4px;
            box-shadow: 0 0 24px rgba(19, 216, 196, .3);
            font-size: 20px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 5px;
            margin-left: auto;
        }

        .nav-link {
            position: relative;
            padding: 10px 14px;
            color: #b9d0d3;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 650;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--white);
            background: rgba(19, 216, 196, .1);
        }

        .nav-link.active::after {
            position: absolute;
            right: 14px;
            bottom: 3px;
            left: 14px;
            height: 2px;
            content: "";
            background: var(--aqua);
            border-radius: 5px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: 12px;
        }

        .login-link {
            color: var(--white);
            font-size: 14px;
            font-weight: 700;
            white-space: nowrap;
        }

        .login-link:hover { color: var(--aqua); }

        .btn {
            border: 0;
            border-radius: 11px;
            padding: 12px 19px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            font-weight: 750;
            font-size: 14px;
            line-height: 1.1;
            transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
        }

        .btn:hover { transform: translateY(-2px); }
        .btn:active { transform: translateY(0) scale(.98); }
        .btn:focus-visible,
        .nav-link:focus-visible,
        .brand:focus-visible,
        .fab:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(19, 216, 196, .45);
            outline-offset: 3px;
        }

        .btn-primary {
            color: var(--ink);
            background: var(--aqua);
            box-shadow: 0 9px 24px rgba(19, 216, 196, .2);
        }

        .btn-primary:hover {
            color: var(--ink);
            background: #54eadb;
            box-shadow: 0 13px 30px rgba(19, 216, 196, .3);
        }

        .btn-outline {
            color: var(--aqua-soft);
            background: transparent;
            border: 1px solid rgba(138, 244, 232, .45);
        }

        .btn-outline:hover {
            color: var(--ink);
            background: var(--aqua-soft);
            border-color: var(--aqua-soft);
        }

        .btn-light {
            color: var(--ink);
            background: var(--white);
        }

        .btn-light:hover { color: var(--ink); background: var(--aqua-soft); }

        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            color: var(--white);
            background: transparent;
            border: 1px solid var(--line);
            border-radius: 10px;
        }

        .hero {
            min-height: 720px;
            padding: 154px 0 92px;
            position: relative;
            color: var(--white);
            background:
                linear-gradient(90deg, rgba(4, 18, 28, .95) 0%, rgba(5, 28, 41, .86) 42%, rgba(5, 28, 41, .54) 100%),
                url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            isolation: isolate;
        }

        .hero::after {
            position: absolute;
            z-index: -1;
            inset: 0;
            content: "";
            opacity: .28;
            background-image: linear-gradient(rgba(138, 244, 232, .08) 1px, transparent 1px), linear-gradient(90deg, rgba(138, 244, 232, .08) 1px, transparent 1px);
            background-size: 48px 48px;
            mask-image: linear-gradient(to bottom, #000, transparent 90%);
        }

        .hero-inner { max-width: 1010px; }

        .eyebrow,
        .section-kicker,
        .mini-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--aqua-soft);
            font-size: 11px;
            font-weight: 800;
            letter-spacing: .13em;
            text-transform: uppercase;
        }

        .eyebrow::before,
        .section-kicker::before {
            width: 24px;
            height: 2px;
            content: "";
            background: var(--aqua);
            border-radius: 5px;
        }

        .hero h1 {
            max-width: 920px;
            margin: 18px 0 22px;
            font-size: clamp(2.5rem, 6vw, 5.15rem);
            font-weight: 850;
            letter-spacing: -.065em;
        }

        .hero h1 span { color: var(--aqua); }

        .hero-copy {
            max-width: 710px;
            color: #d2e7e6;
            font-size: clamp(1.05rem, 2vw, 1.23rem);
        }

        .hero-tools {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 13px;
            margin-top: 34px;
        }

        .hero-note {
            margin-top: 18px;
            color: #a9c4c7;
            font-size: 13px;
        }

        .hero-note i { color: var(--lime); }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, minmax(130px, 1fr));
            max-width: 690px;
            gap: 1px;
            margin-top: 64px;
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .hero-stat {
            padding: 18px 22px 18px 0;
            border-right: 1px solid var(--line);
        }

        .hero-stat:not(:first-child) { padding-left: 22px; }
        .hero-stat:last-child { border-right: 0; }
        .hero-stat strong { display: block; color: var(--white); font-size: 25px; }
        .hero-stat span { color: var(--muted); font-size: 13px; }

        .section {
            padding: 102px 0;
        }

        .section-dark {
            color: var(--white);
            background: var(--ink);
        }

        .section-deep {
            color: var(--white);
            background: var(--ink-soft);
        }

        .section-heading {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 35px;
            margin-bottom: 42px;
        }

        .section-heading h2 {
            max-width: 700px;
            margin-top: 13px;
            font-size: clamp(2rem, 4vw, 3.25rem);
            font-weight: 820;
        }

        .section-heading p {
            max-width: 440px;
            margin: 0;
            color: var(--muted-dark);
        }

        .section-dark .section-heading p,
        .section-deep .section-heading p { color: var(--muted); }

        .benefit-layout {
            display: grid;
            grid-template-columns: .85fr 1.35fr;
            gap: 70px;
            align-items: start;
        }

        .benefit-lead {
            position: sticky;
            top: 112px;
        }

        .benefit-lead h2 {
            margin: 13px 0 20px;
            font-size: clamp(2rem, 4vw, 3.25rem);
        }

        .benefit-lead p { color: var(--muted-dark); }

        .benefit-list {
            border-top: 1px solid var(--line-light);
        }

        .benefit-item {
            display: grid;
            grid-template-columns: 52px 1fr;
            gap: 20px;
            padding: 24px 0;
            border-bottom: 1px solid var(--line-light);
        }

        .benefit-icon {
            width: 47px;
            height: 47px;
            display: grid;
            place-items: center;
            color: var(--ink);
            background: var(--lime);
            border-radius: 14px 14px 14px 4px;
            font-size: 21px;
        }

        .benefit-item h3 { margin-bottom: 7px; font-size: 19px; }
        .benefit-item p { margin: 0; color: var(--muted-dark); font-size: 15px; }

        .image-strip {
            position: relative;
            min-height: 310px;
            margin-top: 55px;
            overflow: hidden;
            border-radius: var(--radius-lg);
            background: var(--ocean);
        }

        .image-strip img {
            width: 100%;
            height: 100%;
            min-height: 310px;
            object-fit: cover;
            opacity: .78;
        }

        .image-strip-caption {
            position: absolute;
            right: 28px;
            bottom: 25px;
            left: 28px;
            max-width: 480px;
            padding: 22px;
            color: var(--white);
            background: rgba(7, 22, 34, .78);
            border: 1px solid rgba(138, 244, 232, .22);
            border-radius: var(--radius-sm);
            backdrop-filter: blur(10px);
        }

        .image-strip-caption strong { display: block; margin-bottom: 5px; font-size: 20px; }
        .image-strip-caption span { color: #c2d9d9; font-size: 14px; }

        .comparison-wrap {
            overflow: hidden;
            background: #0a1f2d;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
        }

        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1.15fr 1.15fr;
        }

        .comparison-cell {
            min-height: 80px;
            padding: 22px 25px;
            border-right: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .comparison-cell:nth-child(3n) { border-right: 0; }
        .comparison-cell:nth-last-child(-n+3) { border-bottom: 0; }
        .comparison-head {
            color: var(--muted);
            background: rgba(255,255,255,.025);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: .1em;
            text-transform: uppercase;
        }

        .comparison-cell strong { display: block; color: var(--white); font-size: 16px; }
        .comparison-cell span { color: #a6c2c5; font-size: 14px; }
        .comparison-cell .check { color: var(--lime); font-size: 20px; }

        .portal-section {
            background: #e8f5f2;
        }

        .portal-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .portal {
            min-height: 220px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 23px;
            overflow: hidden;
            color: var(--white);
            background: var(--ink);
            border-radius: var(--radius-md);
            position: relative;
            isolation: isolate;
            box-shadow: var(--shadow-soft);
        }

        .portal::before {
            position: absolute;
            z-index: -1;
            inset: 0;
            content: "";
            background: linear-gradient(145deg, rgba(10, 201, 185, .25), transparent 55%);
        }

        .portal:nth-child(2)::before { background: linear-gradient(145deg, rgba(185, 239, 86, .23), transparent 60%); }
        .portal:nth-child(3)::before { background: linear-gradient(145deg, rgba(247, 201, 93, .2), transparent 60%); }
        .portal:nth-child(4)::before { background: linear-gradient(145deg, rgba(255, 128, 107, .2), transparent 60%); }

        .portal:hover { transform: translateY(-6px); box-shadow: 0 18px 35px rgba(3, 32, 43, .2); }
        .portal-icon { color: var(--aqua); font-size: 30px; }
        .portal:nth-child(2) .portal-icon { color: var(--lime); }
        .portal:nth-child(3) .portal-icon { color: var(--gold); }
        .portal:nth-child(4) .portal-icon { color: var(--coral); }
        .portal h3 { margin: 18px 0 8px; font-size: 20px; }
        .portal p { margin: 0; color: #b6cdcf; font-size: 14px; }
        .portal-link { margin-top: 17px; color: var(--aqua-soft); font-size: 13px; font-weight: 750; }

        .process-layout {
            display: grid;
            grid-template-columns: 1fr .9fr;
            gap: 75px;
            align-items: center;
        }

        .process-visual {
            position: relative;
            min-height: 390px;
            padding: 28px;
            overflow: hidden;
            border-radius: var(--radius-lg);
            background:
                linear-gradient(145deg, rgba(7, 22, 34, .36), rgba(7, 22, 34, .9)),
                url('/assets/images/backpic/back-2.jpg') center/cover;
        }

        .process-visual::after {
            position: absolute;
            inset: 20px;
            content: "";
            border: 1px solid rgba(138, 244, 232, .28);
            border-radius: 20px;
            pointer-events: none;
        }

        .process-badge {
            position: absolute;
            z-index: 1;
            right: 35px;
            bottom: 35px;
            left: 35px;
            padding: 18px 20px;
            background: rgba(7, 22, 34, .84);
            border-left: 3px solid var(--lime);
            border-radius: 10px;
        }

        .process-badge strong { display: block; color: var(--white); }
        .process-badge span { color: var(--muted); font-size: 13px; }

        .process-copy .section-kicker { color: var(--aqua); }
        .process-copy h2 { margin: 14px 0 18px; font-size: clamp(2rem, 4vw, 3.1rem); }
        .process-copy > p { color: var(--muted-dark); }

        .steps { margin-top: 28px; }
        .step {
            display: grid;
            grid-template-columns: 38px 1fr;
            gap: 17px;
            padding: 17px 0;
            border-top: 1px solid var(--line-light);
        }

        .step-number {
            width: 32px;
            height: 32px;
            display: grid;
            place-items: center;
            color: var(--ink);
            background: var(--aqua);
            border-radius: 50%;
            font-size: 13px;
            font-weight: 850;
        }

        .step h3 { margin-bottom: 4px; font-size: 17px; }
        .step p { margin: 0; color: var(--muted-dark); font-size: 14px; }

        .info-layout {
            display: grid;
            grid-template-columns: 1.4fr .7fr;
            gap: 50px;
        }

        .info-list { border-top: 1px solid var(--line); }
        .info-item {
            display: grid;
            grid-template-columns: 115px 1fr 24px;
            gap: 20px;
            align-items: center;
            padding: 19px 0;
            border-bottom: 1px solid var(--line);
        }

        .info-item time,
        .info-category {
            color: var(--aqua);
            font-size: 12px;
            font-weight: 750;
        }

        .info-item h3 { margin: 0; color: var(--white); font-size: 17px; }
        .info-item p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
        .info-arrow { color: var(--muted); font-size: 18px; }
        .info-item:hover .info-arrow { color: var(--aqua); transform: translateX(4px); }

        .info-aside {
            padding: 30px;
            color: var(--ink);
            background: linear-gradient(145deg, var(--lime), #d8f59f);
            border-radius: var(--radius-lg);
            align-self: start;
        }

        .info-aside i { font-size: 30px; }
        .info-aside h3 { margin: 20px 0 10px; font-size: 25px; }
        .info-aside p { color: #37553e; font-size: 14px; }
        .info-aside a { color: #1d4f37; font-weight: 800; }

        .open-section {
            background:
                radial-gradient(circle at 88% 18%, rgba(19, 216, 196, .15), transparent 25%),
                var(--ocean);
            color: var(--white);
        }

        .open-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 70px;
            align-items: center;
        }

        .open-layout h2 { margin: 14px 0 18px; font-size: clamp(2rem, 4vw, 3.3rem); }
        .open-layout .lead { color: #c1d9da; }
        .open-points { margin-top: 26px; }
        .open-points li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin: 12px 0;
            color: #dceceb;
        }

        .open-points i { color: var(--lime); margin-top: 4px; }
        .download-box {
            padding: 31px;
            background: rgba(4, 18, 28, .48);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
        }

        .download-box h3 { margin-bottom: 8px; font-size: 23px; }
        .download-box > p { color: var(--muted); font-size: 14px; }
        .download-form { display: grid; gap: 12px; margin-top: 22px; }
        .download-form select,
        .download-form input {
            width: 100%;
            padding: 13px 15px;
            color: var(--white);
            background: #102e3e;
            border: 1px solid rgba(138, 244, 232, .25);
            border-radius: 10px;
        }

        .download-form option { color: var(--ink); }
        .form-status { min-height: 20px; color: var(--lime); font-size: 13px; }

        .faq-layout {
            display: grid;
            grid-template-columns: .72fr 1.28fr;
            gap: 80px;
            align-items: start;
        }

        .faq-intro h2 { margin: 14px 0 18px; font-size: clamp(2rem, 4vw, 3rem); }
        .faq-intro p { color: var(--muted-dark); }
        .faq-contact {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-top: 18px;
            color: var(--ocean);
            font-weight: 800;
        }

        .accordion-item {
            background: transparent;
            border: 0;
            border-top: 1px solid var(--line-light);
        }

        .accordion-item:last-child { border-bottom: 1px solid var(--line-light); }
        .accordion-button {
            padding: 22px 36px 22px 0;
            color: var(--ink);
            background: transparent;
            box-shadow: none !important;
            font-weight: 760;
            line-height: 1.35;
        }

        .accordion-button:not(.collapsed) { color: var(--ocean); background: transparent; }
        .accordion-button::after {
            width: 14px;
            height: 14px;
            background-size: 14px;
        }

        .accordion-body {
            padding: 0 38px 24px 0;
            color: var(--muted-dark);
            font-size: 15px;
        }

        .final-cta {
            padding: 76px 0;
            color: var(--white);
            text-align: center;
            background:
                linear-gradient(120deg, rgba(7, 22, 34, .9), rgba(16, 59, 81, .8)),
                url('/assets/images/backpic/back-3.jpg') center/cover;
        }

        .final-cta h2 { max-width: 700px; margin: 13px auto 16px; font-size: clamp(2rem, 4vw, 3.4rem); }
        .final-cta p { max-width: 650px; margin: 0 auto 26px; color: #c4dbdc; }
        .final-cta .section-kicker { justify-content: center; }

        .site-footer {
            padding: 52px 0 25px;
            color: #a4bdc0;
            background: #041019;
            border-top: 1px solid var(--line);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr .8fr .8fr 1fr;
            gap: 45px;
            padding-bottom: 42px;
        }

        .footer-brand { max-width: 290px; }
        .footer-brand .brand { margin-bottom: 17px; }
        .footer-brand p { color: #769399; font-size: 14px; }
        .footer-title { margin-bottom: 17px; color: var(--white); font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
        .footer-links li { margin: 9px 0; }
        .footer-links a { color: #91adb0; font-size: 14px; }
        .footer-links a:hover { color: var(--aqua); }
        .footer-trust {
            padding: 17px;
            background: rgba(138, 244, 232, .05);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
        }

        .footer-trust strong { display: block; color: var(--white); font-size: 15px; }
        .footer-trust span { display: block; margin-top: 5px; color: #769399; font-size: 13px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding-top: 22px;
            border-top: 1px solid rgba(127, 220, 213, .12);
            color: #66868c;
            font-size: 12px;
        }

        .fab {
            position: fixed;
            z-index: 1050;
            left: 16px;
            bottom: 96px;
            width: 57px;
            height: 57px;
            display: grid;
            place-items: center;
            color: var(--aqua);
            background: rgba(2, 15, 24, .84);
            border: 1px solid var(--aqua);
            border-radius: 50%;
            box-shadow: 0 0 20px rgba(19, 216, 196, .45);
            opacity: .72;
            transition: opacity .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
            animation: float 3.6s ease-in-out infinite;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 34px rgba(19, 216, 196, .72);
        }

        .fab:active { transform: scale(.95); }
        .fab i { font-size: 23px; }
        .fab-dot {
            position: absolute;
            top: 1px;
            right: 1px;
            width: 11px;
            height: 11px;
            background: var(--coral);
            border: 2px solid var(--ink);
            border-radius: 50%;
            animation: blink 1.8s infinite;
        }

        .bottom-bar {
            position: fixed;
            z-index: 900;
            right: 0;
            bottom: 0;
            left: 0;
            display: none;
            padding: 10px 15px;
            background: rgba(4, 16, 25, .95);
            border-top: 1px solid var(--line);
            backdrop-filter: blur(15px);
        }

        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }

        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: .35; }
        }

        @media (max-width: 1024px) {
            .container { width: min(100% - 34px, 900px); }
            .nav-shell { gap: 15px; }
            .main-nav { gap: 0; }
            .nav-link { padding-right: 10px; padding-left: 10px; }
            .benefit-layout,
            .process-layout,
            .open-layout { gap: 38px; }
            .portal-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
            .footer-trust { grid-column: span 3; }
        }

        @media (max-width: 767px) {
            .container { width: min(100% - 30px, 620px); }
            .nav-shell { min-height: 68px; }
            .brand { max-width: 185px; font-size: 13px; }
            .brand-mark { width: 34px; height: 34px; flex-basis: 34px; font-size: 17px; }
            .menu-toggle { display: block; margin-left: auto; }
            .main-nav {
                position: absolute;
                top: calc(100% + 1px);
                right: 15px;
                left: 15px;
                display: none;
                flex-direction: column;
                align-items: stretch;
                padding: 10px;
                background: #091d2b;
                border: 1px solid var(--line);
                border-radius: 14px;
                box-shadow: var(--shadow);
            }

            .main-nav.show { display: flex; }
            .nav-link { padding: 12px; }
            .nav-link.active::after { right: 12px; left: auto; width: 25px; }
            .nav-actions { margin-left: 4px; gap: 11px; }
            .login-link { font-size: 13px; }
            .nav-actions .btn { padding: 10px 12px; font-size: 12px; }
            .hero { min-height: 700px; padding: 130px 0 65px; }
            .hero h1 { font-size: clamp(2.25rem, 11vw, 3.8rem); }
            .hero-stats { margin-top: 43px; }
            .hero-stat { padding-right: 11px; }
            .hero-stat:not(:first-child) { padding-left: 11px; }
            .hero-stat strong { font-size: 20px; }
            .hero-stat span { font-size: 11px; line-height: 1.3; }
            .section { padding: 70px 0; }
            .section-heading,
            .benefit-layout,
            .process-layout,
            .info-layout,
            .open-layout,
            .faq-layout { display: block; }
            .section-heading { margin-bottom: 30px; }
            .section-heading p { margin-top: 18px; }
            .benefit-lead { position: static; margin-bottom: 34px; }
            .image-strip { margin-top: 35px; }
            .comparison-grid { grid-template-columns: 1fr; }
            .comparison-cell,
            .comparison-cell:nth-child(3n) { border-right: 0; }
            .comparison-cell:nth-last-child(-n+3) { border-bottom: 1px solid var(--line); }
            .comparison-cell:last-child { border-bottom: 0; }
            .comparison-head { display: none; }
            .comparison-cell:first-child { padding-bottom: 5px; border-bottom: 0; }
            .comparison-cell:first-child strong { color: var(--aqua); }
            .portal-grid { grid-template-columns: 1fr 1fr; gap: 11px; }
            .portal { min-height: 195px; padding: 18px; }
            .portal h3 { font-size: 17px; }
            .process-visual { min-height: 290px; margin-bottom: 38px; }
            .info-aside { margin-top: 30px; }
            .info-item { grid-template-columns: 76px 1fr 16px; gap: 10px; }
            .info-item h3 { font-size: 15px; }
            .info-item p { font-size: 12px; }
            .open-layout > div:first-child { margin-bottom: 36px; }
            .faq-intro { margin-bottom: 34px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px 20px; }
            .footer-brand { grid-column: span 2; }
            .footer-trust { grid-column: span 2; }
            .footer-bottom { flex-direction: column; gap: 7px; }
            .bottom-bar { display: block; }
            .bottom-bar .btn { width: 100%; }
            .fab { bottom: 75px; }
        }

        @media (max-width: 520px) {
            .hero-tools { align-items: stretch; flex-direction: column; }
            .hero-tools .btn { width: 100%; }
            .hero-stats { grid-template-columns: 1fr; }
            .hero-stat,
            .hero-stat:not(:first-child) { padding: 13px 0; border-right: 0; border-bottom: 1px solid var(--line); }
            .hero-stat:last-child { border-bottom: 0; }
            .portal-grid { grid-template-columns: 1fr; }
            .portal { min-height: 155px; }
            .download-box { padding: 22px; }
            .brand { max-width: 160px; }
            .nav-actions { gap: 7px; }
            .login-link { display: none; }
        }

/* roulang page: category1 */
:root {
            --ink: #071622;
            --ink-soft: #0d2433;
            --ocean: #103b51;
            --aqua: #13d8c4;
            --aqua-soft: #8af4e8;
            --lime: #b9ef56;
            --gold: #f7c95d;
            --coral: #ff806b;
            --paper: #f4fbfa;
            --white: #fff;
            --muted: #9db5bb;
            --muted-dark: #58717a;
            --line: rgba(127,220,213,.19);
            --line-light: #d9ebe8;
            --radius-lg: 28px;
            --radius-md: 18px;
            --radius-sm: 12px;
            --shadow: 0 22px 60px rgba(2,21,31,.17);
            --shadow-soft: 0 10px 30px rgba(3,32,43,.09);
            --ease: cubic-bezier(.2,.8,.2,1);
        }
        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--ink);
            background: var(--paper);
            font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            font-size: 16px;
            line-height: 1.62;
            overflow-x: hidden;
        }
        a { color: inherit; text-decoration: none; transition: all .25s var(--ease); }
        img { display: block; max-width: 100%; }
        button, input, select { font: inherit; }
        button { cursor: pointer; }
        .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
        .site-header {
            position: fixed;
            z-index: 1000;
            inset: 0 0 auto;
            background: rgba(7,22,34,.88);
            border-bottom: 1px solid rgba(138,244,232,.12);
            backdrop-filter: blur(18px);
        }
        .nav-shell { min-height: 78px; display: flex; align-items: center; gap: 30px; }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            color: var(--white);
            font-size: 15px;
            font-weight: 800;
            letter-spacing: -.02em;
            line-height: 1.1;
            max-width: 220px;
        }
        .brand:hover { color: var(--aqua-soft); }
        .brand-mark {
            width: 39px;
            height: 39px;
            flex: 0 0 39px;
            display: grid;
            place-items: center;
            color: var(--ink);
            background: linear-gradient(145deg,var(--aqua-soft),var(--aqua));
            border-radius: 13px 13px 13px 4px;
            box-shadow: 0 0 24px rgba(19,216,196,.3);
            font-size: 20px;
        }
        .main-nav { display: flex; align-items: center; gap: 5px; margin-left: auto; }
        .nav-link {
            position: relative;
            padding: 10px 14px;
            color: #b9d0d3;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 650;
        }
        .nav-link:hover, .nav-link.active { color: var(--white); background: rgba(19,216,196,.1); }
        .nav-link.active::after {
            position: absolute;
            right: 14px;
            bottom: 3px;
            left: 14px;
            height: 2px;
            content: "";
            background: var(--aqua);
            border-radius: 5px;
        }
        .nav-actions { display: flex; align-items: center; gap: 10px; margin-left: 12px; }
        .btn {
            border: 0;
            border-radius: 11px;
            padding: 12px 19px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            font-size: 14px;
            font-weight: 750;
            line-height: 1.1;
            transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
        }
        .btn:hover { transform: translateY(-2px); }
        .btn:active { transform: translateY(0) scale(.98); }
        .btn-primary { color: var(--ink); background: var(--aqua); box-shadow: 0 9px 24px rgba(19,216,196,.2); }
        .btn-primary:hover { color: var(--ink); background: #54eadb; box-shadow: 0 13px 30px rgba(19,216,196,.3); }
        .btn-outline { color: var(--aqua-soft); background: transparent; border: 1px solid rgba(138,244,232,.45); }
        .btn-outline:hover { color: var(--ink); background: var(--aqua-soft); border-color: var(--aqua-soft); }
        .btn-light { color: var(--ink); background: var(--white); }
        .btn-light:hover { color: var(--ink); background: var(--aqua-soft); }
        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            color: var(--white);
            background: transparent;
            border: 1px solid var(--line);
            border-radius: 10px;
        }
        .btn:focus-visible, .nav-link:focus-visible, .brand:focus-visible, .fab:focus-visible, a:focus-visible {
            outline: 3px solid rgba(19,216,196,.45);
            outline-offset: 3px;
        }
        .page-banner {
            position: relative;
            min-height: 520px;
            padding: 148px 0 72px;
            color: var(--white);
            isolation: isolate;
            background:
                linear-gradient(90deg,rgba(4,18,28,.96),rgba(5,37,52,.78) 55%,rgba(5,37,52,.48)),
                url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
        }
        .page-banner::after {
            position: absolute;
            z-index: -1;
            inset: 0;
            content: "";
            opacity: .25;
            background-image: linear-gradient(rgba(138,244,232,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(138,244,232,.08) 1px,transparent 1px);
            background-size: 48px 48px;
        }
        .banner-content { max-width: 780px; }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 18px;
            color: var(--aqua-soft);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: .12em;
            text-transform: uppercase;
        }
        .eyebrow::before { width: 28px; height: 2px; content: ""; background: var(--aqua); }
        h1, h2, h3, p { margin-top: 0; }
        h1 { max-width: 820px; margin-bottom: 20px; font-size: clamp(2.3rem,5vw,4.7rem); font-weight: 850; letter-spacing: -.055em; line-height: 1.04; }
        .banner-content > p { max-width: 690px; margin-bottom: 30px; color: #d6eeee; font-size: 1.1rem; }
        .banner-actions { display: flex; flex-wrap: wrap; gap: 12px; }
        .countdown-bar {
            display: flex;
            align-items: center;
            gap: 16px;
            max-width: 600px;
            margin-top: 38px;
            padding: 13px 16px;
            color: #d8fffa;
            background: rgba(7,22,34,.72);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
        }
        .pulse-dot { width: 9px; height: 9px; flex: 0 0 9px; background: var(--lime); border-radius: 50%; box-shadow: 0 0 0 6px rgba(185,239,86,.12); animation: pulse 1.8s infinite; }
        .countdown-bar strong { color: var(--white); font-size: 14px; }
        .timer { margin-left: auto; color: var(--lime); font-size: 17px; font-weight: 800; letter-spacing: .08em; }
        .section { padding: 94px 0; }
        .section-sm { padding: 70px 0; }
        .section-kicker { margin-bottom: 12px; color: var(--ocean); font-size: 12px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
        .section-heading { max-width: 700px; margin-bottom: 42px; }
        .section-heading h2 { margin-bottom: 13px; color: var(--ink); font-size: clamp(1.85rem,3vw,3rem); font-weight: 850; letter-spacing: -.045em; line-height: 1.12; }
        .section-heading p { margin-bottom: 0; color: var(--muted-dark); max-width: 650px; }
        .intro-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; }
        .intro-image { position: relative; overflow: hidden; border-radius: var(--radius-lg); box-shadow: var(--shadow); }
        .intro-image img { width: 100%; min-height: 400px; object-fit: cover; }
        .image-note {
            position: absolute;
            right: 18px;
            bottom: 18px;
            left: 18px;
            padding: 14px 16px;
            color: var(--white);
            background: rgba(7,22,34,.78);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            backdrop-filter: blur(10px);
        }
        .image-note strong { display: block; color: var(--aqua-soft); font-size: 14px; }
        .image-note span { display: block; font-size: 13px; }
        .check-list { padding: 0; margin: 27px 0 0; list-style: none; }
        .check-list li { position: relative; padding: 13px 0 13px 35px; color: var(--muted-dark); border-bottom: 1px solid var(--line-light); }
        .check-list li:last-child { border-bottom: 0; }
        .check-list i { position: absolute; top: 16px; left: 0; color: #0ba99a; font-size: 19px; }
        .feature-band { color: var(--white); background: var(--ink-soft); }
        .feature-band .section-kicker { color: var(--aqua); }
        .feature-band .section-heading h2 { color: var(--white); }
        .feature-band .section-heading p { color: #a9c4c8; }
        .feature-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 60px; align-items: start; }
        .feature-list { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
        .feature-row { display: grid; grid-template-columns: 58px 1fr; gap: 18px; padding: 25px 24px; background: rgba(13,36,51,.92); }
        .feature-row:hover { background: rgba(19,216,196,.09); }
        .feature-icon { width: 45px; height: 45px; display: grid; place-items: center; color: var(--ink); background: var(--aqua); border-radius: 13px; font-size: 21px; }
        .feature-row h3 { margin-bottom: 6px; color: var(--white); font-size: 18px; }
        .feature-row p { margin-bottom: 0; color: #a9c4c8; font-size: 14px; }
        .platform-strip { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 25px; }
        .platform-tag { padding: 8px 11px; color: var(--aqua-soft); background: rgba(19,216,196,.08); border: 1px solid rgba(19,216,196,.25); border-radius: 99px; font-size: 13px; }
        .steps-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: start; }
        .step-list { position: relative; padding-left: 4px; }
        .step-item { position: relative; display: grid; grid-template-columns: 52px 1fr; gap: 19px; padding-bottom: 30px; }
        .step-item:not(:last-child)::after { position: absolute; top: 51px; bottom: 0; left: 25px; width: 1px; content: ""; background: var(--line-light); }
        .step-number { z-index: 1; width: 51px; height: 51px; display: grid; place-items: center; color: var(--ink); background: var(--lime); border-radius: 16px 16px 16px 4px; font-weight: 850; }
        .step-item h3 { margin: 2px 0 5px; font-size: 18px; }
        .step-item p { margin: 0; color: var(--muted-dark); font-size: 14px; }
        .side-note { padding: 30px; background: #e4f6f3; border-left: 4px solid var(--aqua); border-radius: 0 var(--radius-md) var(--radius-md) 0; }
        .side-note h3 { margin-bottom: 14px; font-size: 22px; }
        .side-note p { color: var(--muted-dark); }
        .side-note .btn { margin-top: 12px; }
        .scenario-section { background: #eaf7f5; }
        .scenario-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 22px; }
        .scenario-main, .scenario-mini { position: relative; overflow: hidden; min-height: 300px; border-radius: var(--radius-lg); }
        .scenario-main img, .scenario-mini img { width: 100%; height: 100%; object-fit: cover; }
        .scenario-main::after, .scenario-mini::after { position: absolute; inset: 0; content: ""; background: linear-gradient(0deg,rgba(7,22,34,.88),rgba(7,22,34,.05) 75%); }
        .scenario-copy { position: absolute; z-index: 1; right: 28px; bottom: 26px; left: 28px; color: var(--white); }
        .scenario-copy h3 { margin-bottom: 7px; font-size: 24px; }
        .scenario-copy p { max-width: 620px; margin: 0; color: #d3ebeb; font-size: 14px; }
        .scenario-mini { min-height: 300px; }
        .scenario-mini .scenario-copy { right: 20px; bottom: 20px; left: 20px; }
        .scenario-mini .scenario-copy h3 { font-size: 19px; }
        .proof-section { padding: 78px 0; background: var(--white); }
        .proof-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
        .proof-item { padding: 28px 30px; border-right: 1px solid var(--line-light); }
        .proof-item:last-child { border-right: 0; }
        .proof-item strong { display: block; margin-bottom: 7px; color: var(--ocean); font-size: 28px; letter-spacing: -.05em; }
        .proof-item span { color: var(--muted-dark); font-size: 14px; }
        .faq-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 70px; align-items: start; }
        .faq-intro h2 { margin-bottom: 15px; font-size: clamp(1.9rem,3vw,2.8rem); letter-spacing: -.045em; line-height: 1.1; }
        .faq-intro p { color: var(--muted-dark); }
        .accordion-item { margin-bottom: 10px; border: 1px solid var(--line-light) !important; border-radius: var(--radius-sm) !important; overflow: hidden; background: var(--white); }
        .accordion-button { padding: 19px 21px; color: var(--ink); background: var(--white); box-shadow: none !important; font-weight: 750; }
        .accordion-button:not(.collapsed) { color: var(--ocean); background: #e8f8f5; }
        .accordion-button::after { background-size: 14px; }
        .accordion-body { padding: 0 21px 20px; color: var(--muted-dark); font-size: 14px; }
        .cta-section { padding: 90px 0; color: var(--white); text-align: center; background: linear-gradient(135deg,var(--ocean),var(--ink)); }
        .cta-section h2 { max-width: 720px; margin: 0 auto 14px; font-size: clamp(2rem,4vw,3.4rem); font-weight: 850; letter-spacing: -.05em; line-height: 1.1; }
        .cta-section p { max-width: 640px; margin: 0 auto 28px; color: #c5dfe0; }
        .site-footer { padding: 66px 0 24px; color: #b6cbd0; background: var(--ink); }
        .footer-grid { display: grid; grid-template-columns: 1.5fr .8fr .9fr 1fr; gap: 42px; padding-bottom: 46px; }
        .footer-brand .brand { margin-bottom: 17px; }
        .footer-brand p { max-width: 310px; margin: 0; color: #8faab0; font-size: 14px; }
        .footer-title { margin-bottom: 15px; color: var(--white); font-size: 14px; font-weight: 800; }
        .footer-links { padding: 0; margin: 0; list-style: none; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a { color: #8faab0; font-size: 14px; }
        .footer-links a:hover { color: var(--aqua); }
        .footer-trust { padding: 18px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: rgba(19,216,196,.05); }
        .footer-trust strong { display: block; margin-bottom: 9px; color: var(--aqua-soft); font-size: 14px; }
        .footer-trust span { display: block; color: #8faab0; font-size: 13px; }
        .footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 21px; color: #6f8b91; border-top: 1px solid rgba(127,220,213,.12); font-size: 12px; }
        .fab {
            position: fixed;
            z-index: 50;
            left: 16px;
            bottom: 24px;
            width: 56px;
            height: 56px;
            display: grid;
            place-items: center;
            color: var(--ink);
            background: linear-gradient(145deg,var(--aqua-soft),var(--aqua));
            border: 3px solid var(--lime);
            border-radius: 50%;
            box-shadow: 0 4px 20px rgba(19,216,196,.35);
            opacity: .78;
            font-size: 22px;
            animation: float 3s ease-in-out infinite;
        }
        .fab:hover { opacity: 1; transform: scale(1.1); }
        .fab::after { position: absolute; top: 1px; right: 1px; width: 10px; height: 10px; content: ""; background: var(--coral); border: 2px solid var(--ink); border-radius: 50%; }
        @keyframes pulse { 50% { opacity: .45; transform: scale(.8); } }
        @keyframes float { 50% { transform: translateY(-5px); } }
        @media (max-width: 1024px) {
            .intro-grid, .feature-layout, .faq-layout { gap: 35px; }
            .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
            .footer-trust { grid-column: span 3; }
        }
        @media (max-width: 768px) {
            .container { width: min(100% - 30px, 620px); }
            .nav-shell { min-height: 70px; gap: 12px; }
            .menu-toggle { display: block; margin-left: auto; }
            .main-nav {
                position: absolute;
                top: 70px;
                right: 15px;
                left: 15px;
                display: none;
                padding: 10px;
                flex-direction: column;
                align-items: stretch;
                background: rgba(7,22,34,.98);
                border: 1px solid var(--line);
                border-radius: var(--radius-sm);
            }
            .main-nav.open { display: flex; }
            .nav-link { padding: 12px; }
            .nav-actions { margin-left: 0; gap: 6px; }
            .nav-actions .btn { padding: 10px 11px; font-size: 12px; }
            .page-banner { min-height: 590px; padding-top: 125px; }
            h1 { font-size: clamp(2.3rem,10vw,3.8rem); }
            .intro-grid, .feature-layout, .steps-wrap, .scenario-grid, .faq-layout { grid-template-columns: 1fr; }
            .intro-image { order: -1; }
            .intro-image img { min-height: 280px; }
            .feature-layout { gap: 35px; }
            .scenario-main { min-height: 340px; }
            .proof-grid { grid-template-columns: 1fr; }
            .proof-item { border-right: 0; border-bottom: 1px solid var(--line-light); }
            .proof-item:last-child { border-bottom: 0; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px 20px; }
            .footer-brand, .footer-trust { grid-column: span 2; }
            .footer-bottom { flex-direction: column; gap: 7px; }
        }
        @media (max-width: 520px) {
            .brand { font-size: 13px; max-width: 145px; }
            .brand-mark { width: 35px; height: 35px; flex-basis: 35px; font-size: 17px; }
            .nav-actions .btn-outline { display: none; }
            .page-banner { padding-bottom: 55px; }
            .banner-content > p { font-size: 1rem; }
            .banner-actions { flex-direction: column; align-items: stretch; }
            .banner-actions .btn { width: 100%; }
            .countdown-bar { gap: 10px; font-size: 13px; }
            .timer { font-size: 14px; }
            .section { padding: 68px 0; }
            .feature-row { grid-template-columns: 45px 1fr; padding: 20px 16px; gap: 13px; }
            .feature-icon { width: 40px; height: 40px; font-size: 18px; }
            .side-note { padding: 23px; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-brand, .footer-trust { grid-column: span 1; }
        }

/* roulang page: article */
:root {
            --ink: #071622;
            --ink-soft: #0d2433;
            --ocean: #103b51;
            --aqua: #13d8c4;
            --aqua-soft: #8af4e8;
            --lime: #b9ef56;
            --gold: #f7c95d;
            --coral: #ff806b;
            --paper: #f4fbfa;
            --white: #ffffff;
            --muted: #9db5bb;
            --muted-dark: #58717a;
            --line: rgba(127, 220, 213, .19);
            --line-light: #d9ebe8;
            --radius-lg: 28px;
            --radius-md: 18px;
            --radius-sm: 12px;
            --shadow: 0 22px 60px rgba(2, 21, 31, .17);
            --shadow-soft: 0 10px 30px rgba(3, 32, 43, .09);
            --ease: cubic-bezier(.2, .8, .2, 1);
        }

        html {
            scroll-behavior: smooth;
        }

        * {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            color: var(--ink);
            background: var(--paper);
            font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            font-size: 16px;
            line-height: 1.62;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
        }

        a:hover {
            color: var(--aqua);
        }

        button,
        input,
        select {
            font: inherit;
        }

        button {
            cursor: pointer;
        }

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

        .container {
            width: min(1180px, calc(100% - 40px));
            margin: 0 auto;
        }

        .site-header {
            position: fixed;
            z-index: 1000;
            top: 0;
            right: 0;
            left: 0;
            background: rgba(7, 22, 34, .88);
            border-bottom: 1px solid rgba(138, 244, 232, .12);
            backdrop-filter: blur(18px);
        }

        .nav-shell {
            min-height: 78px;
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            color: var(--white);
            font-weight: 800;
            font-size: 15px;
            letter-spacing: -.02em;
            line-height: 1.1;
            max-width: 220px;
        }

        .brand:hover {
            color: var(--white);
        }

        .brand-mark {
            width: 39px;
            height: 39px;
            flex: 0 0 39px;
            display: grid;
            place-items: center;
            color: var(--ink);
            background: linear-gradient(145deg, var(--aqua-soft), var(--aqua));
            border-radius: 13px 13px 13px 4px;
            box-shadow: 0 0 24px rgba(19, 216, 196, .3);
            font-size: 20px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 5px;
            margin-left: auto;
        }

        .nav-link {
            position: relative;
            padding: 10px 14px;
            color: #b9d0d3;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 650;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--white);
            background: rgba(19, 216, 196, .1);
        }

        .nav-link.active::after {
            position: absolute;
            right: 14px;
            bottom: 3px;
            left: 14px;
            height: 2px;
            content: "";
            background: var(--aqua);
            border-radius: 5px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: 12px;
        }

        .btn {
            border: 0;
            border-radius: 11px;
            padding: 12px 19px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            font-weight: 750;
            font-size: 14px;
            line-height: 1.1;
            transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
        }

        .btn:hover {
            transform: translateY(-2px);
        }

        .btn:active {
            transform: translateY(0) scale(.98);
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        .brand:focus-visible,
        .fab:focus-visible,
        input:focus-visible,
        select:focus-visible,
        .accordion-button:focus-visible {
            outline: 3px solid rgba(19, 216, 196, .45);
            outline-offset: 3px;
        }

        .btn-primary {
            color: var(--ink);
            background: var(--aqua);
            box-shadow: 0 9px 24px rgba(19, 216, 196, .2);
        }

        .btn-primary:hover {
            color: var(--ink);
            background: #54eadb;
            box-shadow: 0 13px 30px rgba(19, 216, 196, .3);
        }

        .btn-outline {
            color: var(--aqua-soft);
            background: transparent;
            border: 1px solid rgba(138, 244, 232, .45);
        }

        .btn-outline:hover {
            color: var(--ink);
            background: var(--aqua-soft);
            border-color: var(--aqua-soft);
        }

        .btn-light {
            color: var(--ink);
            background: var(--white);
        }

        .btn-light:hover {
            color: var(--ink);
            background: var(--aqua-soft);
        }

        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            color: var(--white);
            background: transparent;
            border: 1px solid var(--line);
            border-radius: 10px;
        }

        .article-banner {
            position: relative;
            min-height: 390px;
            padding: 145px 0 72px;
            color: var(--white);
            background:
                linear-gradient(100deg, rgba(4, 22, 33, .96), rgba(7, 49, 63, .76) 58%, rgba(5, 39, 49, .45)),
                url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            isolation: isolate;
        }

        .article-banner::before {
            position: absolute;
            z-index: -1;
            inset: 0;
            content: "";
            opacity: .25;
            background-image: linear-gradient(rgba(138, 244, 232, .08) 1px, transparent 1px), linear-gradient(90deg, rgba(138, 244, 232, .08) 1px, transparent 1px);
            background-size: 44px 44px;
        }

        .breadcrumb-line {
            display: flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 20px;
            color: var(--aqua-soft);
            font-size: 13px;
            font-weight: 700;
        }

        .breadcrumb-line span {
            color: rgba(255,255,255,.58);
        }

        .banner-copy {
            max-width: 850px;
        }

        .eyebrow,
        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
            color: var(--aqua);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: .12em;
            text-transform: uppercase;
        }

        .eyebrow::before,
        .section-kicker::before {
            width: 27px;
            height: 2px;
            content: "";
            background: var(--aqua);
            border-radius: 4px;
        }

        .banner-copy h1 {
            max-width: 900px;
            margin: 0;
            font-size: clamp(2.2rem, 5vw, 4.3rem);
            line-height: 1.08;
            letter-spacing: -.055em;
            font-weight: 850;
        }

        .banner-copy p {
            max-width: 720px;
            margin: 22px 0 0;
            color: #d1e4e5;
            font-size: 18px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 17px;
            margin-top: 25px;
            color: #b9d0d3;
            font-size: 13px;
        }

        .article-meta i {
            margin-right: 5px;
            color: var(--aqua);
        }

        .page-main {
            padding: 76px 0 100px;
        }

        .article-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 320px;
            gap: 62px;
            align-items: start;
        }

        .article-content {
            min-width: 0;
            color: #284550;
        }

        .article-content > :first-child {
            margin-top: 0;
        }

        .article-content h2 {
            margin: 42px 0 15px;
            color: var(--ink);
            font-size: clamp(1.55rem, 3vw, 2.05rem);
            line-height: 1.2;
            letter-spacing: -.035em;
        }

        .article-content h3 {
            margin: 30px 0 12px;
            color: var(--ink-soft);
            font-size: 1.27rem;
            line-height: 1.3;
        }

        .article-content p {
            margin: 0 0 18px;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 24px;
            padding-left: 22px;
        }

        .article-content li {
            margin: 8px 0;
            padding-left: 4px;
        }

        .article-content li::marker {
            color: var(--aqua);
            font-weight: 800;
        }

        .article-content a {
            color: #007d76;
            font-weight: 700;
            text-decoration: underline;
            text-decoration-color: rgba(0,125,118,.28);
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--ocean);
            text-decoration-color: var(--ocean);
        }

        .article-content blockquote {
            margin: 30px 0;
            padding: 24px 27px;
            color: var(--ink-soft);
            background: #e8f8f5;
            border-left: 4px solid var(--aqua);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-size: 1.08rem;
            font-weight: 650;
        }

        .article-content img {
            width: 100%;
            height: auto;
            margin: 25px 0;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-soft);
        }

        .article-content table {
            width: 100%;
            margin: 24px 0;
            border-collapse: collapse;
            overflow: hidden;
            border-radius: var(--radius-sm);
        }

        .article-content th,
        .article-content td {
            padding: 12px 14px;
            border: 1px solid var(--line-light);
            text-align: left;
        }

        .article-content th {
            color: var(--ink);
            background: #e4f3f1;
        }

        .article-sidebar {
            position: sticky;
            top: 105px;
        }

        .side-panel {
            padding: 25px;
            background: var(--white);
            border: 1px solid var(--line-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-soft);
        }

        .side-panel + .side-panel {
            margin-top: 18px;
        }

        .side-panel h2,
        .side-panel h3 {
            margin: 0 0 17px;
            color: var(--ink);
            font-size: 1.15rem;
            line-height: 1.25;
        }

        .quick-list {
            display: grid;
            gap: 13px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .quick-list li {
            display: flex;
            gap: 11px;
            align-items: flex-start;
            color: var(--muted-dark);
            font-size: 14px;
        }

        .quick-list i {
            flex: 0 0 20px;
            color: #008e84;
            font-size: 17px;
        }

        .download-panel {
            color: var(--white);
            background:
                linear-gradient(145deg, rgba(13, 66, 79, .98), rgba(7, 27, 42, .98)),
                url('/assets/images/coverpic/cover-5.jpg') center/cover;
            border: 0;
        }

        .download-panel h3 {
            color: var(--white);
        }

        .download-panel p {
            margin: 0 0 18px;
            color: #c7e7e4;
            font-size: 14px;
        }

        .platform-row {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 0 0 18px;
        }

        .platform-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 10px;
            color: var(--aqua-soft);
            background: rgba(255,255,255,.08);
            border: 1px solid rgba(138,244,232,.22);
            border-radius: 8px;
            font-size: 12px;
            font-weight: 750;
        }

        .info-strip {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin: 35px 0 42px;
            padding: 23px;
            background: var(--ink);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow);
        }

        .info-item {
            padding-right: 15px;
            border-right: 1px solid rgba(138,244,232,.17);
        }

        .info-item:last-child {
            border-right: 0;
        }

        .info-item strong {
            display: block;
            margin-bottom: 2px;
            color: var(--aqua);
            font-size: 1.4rem;
            line-height: 1.15;
        }

        .info-item span {
            color: #abc4c8;
            font-size: 13px;
        }

        .feature-band {
            position: relative;
            margin-top: 65px;
            padding: 70px 0;
            background:
                linear-gradient(110deg, rgba(7, 22, 34, .97), rgba(13, 59, 73, .91)),
                url('/assets/images/backpic/back-3.jpg') center/cover;
            color: var(--white);
            overflow: hidden;
        }

        .feature-band::after {
            position: absolute;
            right: -100px;
            bottom: -160px;
            width: 390px;
            height: 390px;
            content: "";
            border: 1px solid rgba(19,216,196,.25);
            border-radius: 50%;
            box-shadow: 0 0 0 30px rgba(19,216,196,.04), 0 0 0 65px rgba(19,216,196,.025);
        }

        .split-heading {
            display: grid;
            grid-template-columns: .78fr 1.22fr;
            gap: 50px;
            align-items: end;
            margin-bottom: 34px;
        }

        .split-heading h2 {
            margin: 0;
            color: var(--white);
            font-size: clamp(1.8rem, 3.5vw, 2.7rem);
            line-height: 1.13;
            letter-spacing: -.045em;
        }

        .split-heading p {
            max-width: 610px;
            margin: 0;
            color: #b9d0d3;
        }

        .benefit-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .benefit {
            min-height: 190px;
            padding: 24px;
            background: rgba(255,255,255,.055);
            border: 1px solid rgba(138,244,232,.16);
            border-radius: var(--radius-md);
            transition: transform .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
        }

        .benefit:hover {
            transform: translateY(-5px);
            background: rgba(19,216,196,.09);
            border-color: rgba(138,244,232,.42);
        }

        .benefit-icon {
            display: grid;
            width: 43px;
            height: 43px;
            place-items: center;
            margin-bottom: 19px;
            color: var(--ink);
            background: var(--aqua);
            border-radius: 12px 12px 12px 3px;
            font-size: 20px;
        }

        .benefit h3 {
            margin: 0 0 8px;
            color: var(--white);
            font-size: 1.08rem;
        }

        .benefit p {
            margin: 0;
            color: #b9d0d3;
            font-size: 14px;
        }

        .faq-section {
            padding: 78px 0 86px;
        }

        .faq-layout {
            display: grid;
            grid-template-columns: .72fr 1.28fr;
            gap: 68px;
            align-items: start;
        }

        .faq-intro h2 {
            margin: 0 0 15px;
            color: var(--ink);
            font-size: clamp(1.9rem, 4vw, 2.7rem);
            line-height: 1.12;
            letter-spacing: -.045em;
        }

        .faq-intro p {
            margin: 0;
            color: var(--muted-dark);
        }

        .accordion {
            --bs-accordion-border-color: var(--line-light);
            --bs-accordion-btn-focus-box-shadow: none;
            --bs-accordion-active-bg: #eaf8f5;
            --bs-accordion-active-color: var(--ink);
        }

        .accordion-item {
            margin-bottom: 11px;
            overflow: hidden;
            background: var(--white);
            border: 1px solid var(--line-light) !important;
            border-radius: var(--radius-sm) !important;
            box-shadow: 0 5px 16px rgba(3,32,43,.035);
        }

        .accordion-button {
            padding: 19px 21px;
            color: var(--ink);
            background: var(--white);
            font-weight: 750;
        }

        .accordion-button:not(.collapsed) {
            box-shadow: none;
        }

        .accordion-body {
            padding: 0 21px 21px;
            color: var(--muted-dark);
            font-size: 15px;
        }

        .final-cta {
            padding: 68px 0;
            color: var(--white);
            background: var(--ocean);
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 35px;
        }

        .cta-copy {
            max-width: 700px;
        }

        .cta-copy h2 {
            margin: 0 0 11px;
            color: var(--white);
            font-size: clamp(1.8rem, 3.5vw, 2.65rem);
            line-height: 1.13;
            letter-spacing: -.04em;
        }

        .cta-copy p {
            margin: 0;
            color: #bed5d7;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 11px;
            flex: 0 0 auto;
        }

        .site-footer {
            padding: 58px 0 24px;
            color: #b9d0d3;
            background: var(--ink);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr .8fr .8fr 1.1fr;
            gap: 35px;
            padding-bottom: 43px;
        }

        .footer-brand .brand {
            margin-bottom: 18px;
        }

        .footer-brand p {
            max-width: 300px;
            margin: 0;
            color: #89a5ab;
            font-size: 14px;
        }

        .footer-title {
            margin-bottom: 15px;
            color: var(--white);
            font-size: 14px;
            font-weight: 800;
        }

        .footer-links {
            display: grid;
            gap: 9px;
            margin: 0;
            padding: 0;
            list-style: none;
            font-size: 14px;
        }

        .footer-links a {
            color: #89a5ab;
        }

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

        .footer-trust {
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 17px;
            border: 1px solid rgba(138,244,232,.15);
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,.035);
            font-size: 13px;
        }

        .footer-trust strong {
            color: var(--aqua-soft);
            font-size: 14px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding-top: 21px;
            border-top: 1px solid rgba(138,244,232,.13);
            color: #6f8c93;
            font-size: 12px;
        }

        .fab {
            position: fixed;
            z-index: 1050;
            left: 16px;
            bottom: 96px;
            display: inline-flex;
            align-items: center;
            gap: 9px;
            min-width: 52px;
            min-height: 52px;
            padding: 0 16px;
            color: var(--aqua);
            background: rgba(5, 20, 30, .86);
            border: 1px solid var(--aqua);
            border-radius: 999px;
            box-shadow: 0 0 18px rgba(19,216,196,.42);
            backdrop-filter: blur(12px);
            opacity: .78;
            animation: fabFloat 3s ease-in-out infinite;
        }

        .fab:hover {
            color: var(--ink);
            background: var(--aqua);
            opacity: 1;
            box-shadow: 0 0 30px rgba(19,216,196,.7);
            transform: scale(1.08);
        }

        .fab i {
            font-size: 21px;
            transition: transform .35s var(--ease);
        }

        .fab:hover i {
            transform: rotate(360deg);
        }

        .fab::after {
            position: absolute;
            top: 1px;
            right: 3px;
            width: 8px;
            height: 8px;
            content: "";
            background: var(--coral);
            border: 2px solid var(--ink);
            border-radius: 50%;
            animation: blink 1.8s infinite;
        }

        .fab-label {
            font-size: 12px;
            font-weight: 800;
        }

        .not-found {
            max-width: 760px;
            margin: 0 auto;
            padding: 80px 30px;
            text-align: center;
            background: var(--white);
            border: 1px solid var(--line-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-soft);
        }

        .not-found i {
            display: block;
            margin-bottom: 15px;
            color: var(--aqua);
            font-size: 45px;
        }

        .not-found h1 {
            margin: 0 0 12px;
            color: var(--ink);
            font-size: 2rem;
        }

        .not-found p {
            margin: 0 0 25px;
            color: var(--muted-dark);
        }

        @keyframes fabFloat {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-5px); }
        }

        @keyframes blink {
            0%, 45%, 100% { opacity: 1; }
            50%, 90% { opacity: .25; }
        }

        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: minmax(0, 1fr) 285px;
                gap: 35px;
            }

            .footer-grid {
                grid-template-columns: 1.2fr 1fr 1fr;
            }

            .footer-trust {
                grid-column: span 3;
            }
        }

        @media (max-width: 768px) {
            .container {
                width: min(100% - 30px, 620px);
            }

            .nav-shell {
                min-height: 70px;
                gap: 12px;
            }

            .brand {
                font-size: 13px;
                max-width: 190px;
            }

            .brand-mark {
                width: 36px;
                height: 36px;
                flex-basis: 36px;
            }

            .menu-toggle {
                display: block;
                margin-left: auto;
            }

            .main-nav {
                position: absolute;
                top: calc(100% + 1px);
                right: 15px;
                left: 15px;
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: 3px;
                padding: 12px;
                margin: 0;
                background: rgba(7,22,34,.98);
                border: 1px solid rgba(138,244,232,.15);
                border-radius: 0 0 16px 16px;
                box-shadow: var(--shadow);
            }

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

            .nav-link {
                padding: 12px 14px;
            }

            .nav-link.active::after {
                right: auto;
                bottom: 9px;
                left: 14px;
                width: 22px;
            }

            .nav-actions {
                margin-left: 0;
                gap: 6px;
            }

            .nav-actions .btn {
                padding: 10px 12px;
                font-size: 12px;
            }

            .article-banner {
                min-height: 360px;
                padding: 125px 0 58px;
            }

            .banner-copy h1 {
                font-size: clamp(2rem, 9vw, 3.3rem);
            }

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

            .page-main {
                padding: 52px 0 70px;
            }

            .article-grid,
            .faq-layout,
            .split-heading {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .article-sidebar {
                position: static;
            }

            .info-strip {
                gap: 0;
                padding: 18px;
            }

            .info-item {
                padding: 0 12px;
            }

            .feature-band {
                padding: 55px 0;
            }

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

            .benefit {
                min-height: auto;
            }

            .faq-section {
                padding: 58px 0 65px;
            }

            .cta-inner {
                align-items: flex-start;
                flex-direction: column;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px 20px;
            }

            .footer-brand {
                grid-column: span 2;
            }

            .footer-trust {
                grid-column: span 2;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 6px;
            }
        }

        @media (max-width: 520px) {
            .container {
                width: min(100% - 26px, 480px);
            }

            .brand {
                max-width: 160px;
            }

            .nav-actions {
                gap: 4px;
            }

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

            .nav-actions .btn-primary {
                padding: 10px 11px;
            }

            .article-meta {
                gap: 9px 15px;
                font-size: 12px;
            }

            .info-strip {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .info-item {
                padding: 0 0 13px;
                border-right: 0;
                border-bottom: 1px solid rgba(138,244,232,.17);
            }

            .info-item:last-child {
                padding-bottom: 0;
                border-bottom: 0;
            }

            .article-content h2 {
                margin-top: 32px;
            }

            .side-panel {
                padding: 21px;
            }

            .cta-actions {
                width: 100%;
            }

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

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

            .footer-brand,
            .footer-trust {
                grid-column: auto;
            }

            .fab {
                left: 14px;
                bottom: 82px;
            }

            .fab-label {
                display: none;
            }
        }

/* roulang page: category2 */
:root {
            --ink: #071622;
            --ink-soft: #0d2433;
            --ocean: #103b51;
            --aqua: #13d8c4;
            --aqua-soft: #8af4e8;
            --lime: #b9ef56;
            --gold: #f7c95d;
            --coral: #ff806b;
            --paper: #f4fbfa;
            --white: #ffffff;
            --muted: #9db5bb;
            --muted-dark: #58717a;
            --line: rgba(127, 220, 213, .19);
            --line-light: #d9ebe8;
            --radius-lg: 28px;
            --radius-md: 18px;
            --radius-sm: 12px;
            --shadow: 0 22px 60px rgba(2, 21, 31, .17);
            --shadow-soft: 0 10px 30px rgba(3, 32, 43, .09);
            --ease: cubic-bezier(.2, .8, .2, 1);
        }

        html {
            scroll-behavior: smooth;
        }

        * {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            color: var(--ink);
            background: var(--paper);
            font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            font-size: 16px;
            line-height: 1.62;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
        }

        button,
        input,
        select {
            font: inherit;
        }

        button {
            cursor: pointer;
        }

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

        .container {
            width: min(1180px, calc(100% - 40px));
            margin: 0 auto;
        }

        .site-header {
            position: fixed;
            z-index: 1000;
            top: 0;
            right: 0;
            left: 0;
            background: rgba(7, 22, 34, .88);
            border-bottom: 1px solid rgba(138, 244, 232, .12);
            backdrop-filter: blur(18px);
        }

        .nav-shell {
            min-height: 78px;
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            color: var(--white);
            font-weight: 800;
            font-size: 15px;
            letter-spacing: 0;
            line-height: 1.1;
            max-width: 220px;
        }

        .brand:hover {
            color: var(--aqua-soft);
        }

        .brand-mark {
            width: 39px;
            height: 39px;
            flex: 0 0 39px;
            display: grid;
            place-items: center;
            color: var(--ink);
            background: linear-gradient(145deg, var(--aqua-soft), var(--aqua));
            border-radius: 13px 13px 13px 4px;
            box-shadow: 0 0 24px rgba(19, 216, 196, .3);
            font-size: 20px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 5px;
            margin-left: auto;
        }

        .nav-link {
            position: relative;
            padding: 10px 14px;
            color: #b9d0d3;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 650;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--white);
            background: rgba(19, 216, 196, .1);
        }

        .nav-link.active::after {
            position: absolute;
            right: 14px;
            bottom: 3px;
            left: 14px;
            height: 2px;
            content: "";
            background: var(--aqua);
            border-radius: 5px;
        }

        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            color: var(--white);
            background: transparent;
            border: 1px solid var(--line);
            border-radius: 10px;
        }

        .menu-toggle:hover {
            color: var(--aqua);
            border-color: var(--aqua);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            padding: 12px 19px;
            border: 0;
            border-radius: 11px;
            font-size: 14px;
            font-weight: 750;
            line-height: 1.1;
            transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
        }

        .btn:hover {
            transform: translateY(-2px);
        }

        .btn:active {
            transform: translateY(0) scale(.98);
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        .brand:focus-visible,
        .fab:focus-visible,
        input:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(19, 216, 196, .45);
            outline-offset: 3px;
        }

        .btn-primary {
            color: var(--ink);
            background: var(--aqua);
            box-shadow: 0 9px 24px rgba(19, 216, 196, .2);
        }

        .btn-primary:hover {
            color: var(--ink);
            background: #54eadb;
            box-shadow: 0 13px 30px rgba(19, 216, 196, .3);
        }

        .btn-outline {
            color: var(--aqua-soft);
            background: transparent;
            border: 1px solid rgba(138, 244, 232, .45);
        }

        .btn-outline:hover {
            color: var(--ink);
            background: var(--aqua-soft);
            border-color: var(--aqua-soft);
        }

        .hero {
            position: relative;
            min-height: 710px;
            padding: 153px 0 90px;
            color: var(--white);
            background:
                linear-gradient(90deg, rgba(4, 18, 28, .96) 0%, rgba(5, 28, 41, .88) 48%, rgba(5, 28, 41, .58) 100%),
                url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            isolation: isolate;
        }

        .hero::after {
            position: absolute;
            z-index: -1;
            inset: 0;
            content: "";
            opacity: .26;
            background-image: linear-gradient(rgba(138, 244, 232, .08) 1px, transparent 1px), linear-gradient(90deg, rgba(138, 244, 232, .08) 1px, transparent 1px);
            background-size: 48px 48px;
            mask-image: linear-gradient(to bottom, #000, transparent 92%);
        }

        .hero-content {
            max-width: 650px;
            padding-top: 28px;
        }

        .eyebrow,
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--aqua-soft);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: .1em;
            text-transform: uppercase;
        }

        .eyebrow::before,
        .section-label::before {
            width: 28px;
            height: 2px;
            content: "";
            background: var(--aqua);
            border-radius: 4px;
        }

        .hero h1 {
            max-width: 680px;
            margin: 18px 0 22px;
            color: var(--white);
            font-size: 52px;
            font-weight: 800;
            letter-spacing: 0;
            line-height: 1.1;
        }

        .hero-lead {
            max-width: 610px;
            margin: 0;
            color: #c7d9dc;
            font-size: 18px;
            line-height: 1.65;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 31px;
        }

        .hero-aside {
            position: relative;
            max-width: 455px;
            margin-left: auto;
            padding: 18px;
            background: rgba(7, 22, 34, .76);
            border: 1px solid rgba(138, 244, 232, .27);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            backdrop-filter: blur(14px);
        }

        .cover-frame {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 8;
            border-radius: 17px;
            background: var(--ocean);
        }

        .cover-frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: .9;
        }

        .cover-frame::after {
            position: absolute;
            inset: 0;
            content: "";
            background: linear-gradient(180deg, transparent 30%, rgba(7, 22, 34, .78));
        }

        .cover-caption {
            position: absolute;
            z-index: 1;
            right: 18px;
            bottom: 15px;
            left: 18px;
            color: var(--white);
            font-size: 14px;
            font-weight: 750;
        }

        .aside-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            margin: 20px 0 12px;
            color: var(--white);
            font-size: 17px;
            font-weight: 750;
        }

        .aside-heading span {
            color: var(--aqua);
            font-size: 13px;
            font-weight: 700;
        }

        .guide-list {
            display: grid;
            gap: 9px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .guide-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: #b9d0d3;
            font-size: 14px;
        }

        .guide-list i {
            flex: 0 0 auto;
            margin-top: 4px;
            color: var(--lime);
        }

        .section {
            padding: 104px 0;
        }

        .section-compact {
            padding: 82px 0;
        }

        .section-heading {
            max-width: 650px;
            margin-bottom: 42px;
        }

        .section-heading h2 {
            margin: 14px 0 14px;
            color: var(--ink);
            font-size: 38px;
            font-weight: 800;
            letter-spacing: 0;
            line-height: 1.16;
        }

        .section-heading p {
            margin: 0;
            color: var(--muted-dark);
            font-size: 17px;
        }

        .section-heading.light h2 {
            color: var(--white);
        }

        .section-heading.light p {
            color: #b9d0d3;
        }

        .intro-section {
            background: var(--paper);
        }

        .intro-copy {
            max-width: 650px;
        }

        .intro-copy h2 {
            margin: 13px 0 17px;
            font-size: 37px;
            font-weight: 800;
            line-height: 1.18;
        }

        .intro-copy p {
            margin: 0 0 18px;
            color: var(--muted-dark);
        }

        .check-list {
            display: grid;
            gap: 13px;
            margin: 27px 0 0;
            padding: 0;
            list-style: none;
        }

        .check-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--ink-soft);
            font-weight: 650;
        }

        .check-list i {
            display: grid;
            flex: 0 0 25px;
            width: 25px;
            height: 25px;
            place-items: center;
            margin-top: 1px;
            color: var(--ink);
            background: var(--lime);
            border-radius: 50%;
            font-size: 13px;
        }

        .signal-panel {
            position: relative;
            min-height: 305px;
            padding: 28px;
            overflow: hidden;
            color: var(--white);
            background: var(--ink-soft);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-soft);
        }

        .signal-panel::before {
            position: absolute;
            right: -50px;
            bottom: -90px;
            width: 245px;
            height: 245px;
            content: "";
            border: 1px solid rgba(19, 216, 196, .32);
            border-radius: 50%;
            box-shadow: 0 0 0 24px rgba(19, 216, 196, .04), 0 0 0 48px rgba(19, 216, 196, .035);
        }

        .signal-panel h3 {
            position: relative;
            max-width: 300px;
            margin: 0 0 26px;
            font-size: 21px;
            line-height: 1.3;
        }

        .signal-items {
            position: relative;
            display: grid;
            gap: 17px;
        }

        .signal-item {
            display: flex;
            align-items: center;
            gap: 13px;
        }

        .signal-icon {
            display: grid;
            width: 40px;
            height: 40px;
            flex: 0 0 40px;
            place-items: center;
            color: var(--aqua);
            background: rgba(19, 216, 196, .1);
            border: 1px solid rgba(19, 216, 196, .25);
            border-radius: 12px;
        }

        .signal-item strong {
            display: block;
            color: var(--white);
            font-size: 15px;
        }

        .signal-item span {
            display: block;
            color: var(--muted);
            font-size: 13px;
        }

        .dark-section {
            color: var(--white);
            background: var(--ink);
        }

        .content-split {
            display: grid;
            grid-template-columns: minmax(270px, .85fr) minmax(0, 1.15fr);
            gap: 74px;
            align-items: center;
        }

        .feature-image {
            position: relative;
            overflow: hidden;
            min-height: 390px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
        }

        .feature-image img {
            width: 100%;
            height: 100%;
            min-height: 390px;
            object-fit: cover;
        }

        .image-note {
            position: absolute;
            right: 18px;
            bottom: 18px;
            left: 18px;
            padding: 13px 15px;
            color: var(--white);
            background: rgba(7, 22, 34, .82);
            border-left: 3px solid var(--aqua);
            border-radius: 8px;
            font-size: 13px;
            backdrop-filter: blur(8px);
        }

        .contents-list {
            display: grid;
            gap: 20px;
            margin: 28px 0 0;
        }

        .contents-row {
            display: grid;
            grid-template-columns: 44px 1fr;
            gap: 15px;
            padding-bottom: 18px;
            border-bottom: 1px solid var(--line);
        }

        .contents-number {
            color: var(--aqua);
            font-size: 14px;
            font-weight: 800;
        }

        .contents-row h3 {
            margin: 0 0 4px;
            color: var(--white);
            font-size: 17px;
        }

        .contents-row p {
            margin: 0;
            color: var(--muted);
            font-size: 14px;
        }

        .feature-section {
            background: #eaf7f5;
        }

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

        .feature-card {
            min-height: 238px;
            padding: 28px 25px;
            background: rgba(255, 255, 255, .72);
            border: 1px solid var(--line-light);
            border-radius: var(--radius-md);
            transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
        }

        .feature-card:hover {
            transform: translateY(-5px);
            border-color: rgba(19, 216, 196, .55);
            box-shadow: var(--shadow-soft);
        }

        .feature-card:nth-child(2) {
            margin-top: 26px;
        }

        .feature-card:nth-child(3) {
            margin-top: 52px;
        }

        .feature-icon {
            display: grid;
            width: 46px;
            height: 46px;
            place-items: center;
            margin-bottom: 25px;
            color: var(--ink);
            background: var(--aqua);
            border-radius: 14px 14px 14px 4px;
            font-size: 21px;
        }

        .feature-card:nth-child(2) .feature-icon {
            background: var(--lime);
        }

        .feature-card:nth-child(3) .feature-icon {
            background: var(--gold);
        }

        .feature-card h3 {
            margin: 0 0 9px;
            font-size: 19px;
        }

        .feature-card p {
            margin: 0;
            color: var(--muted-dark);
            font-size: 14px;
        }

        .scenes-section {
            background: var(--white);
        }

        .scene-layout {
            display: grid;
            grid-template-columns: .8fr 1.2fr;
            gap: 74px;
            align-items: start;
        }

        .scene-intro {
            position: sticky;
            top: 110px;
        }

        .scene-intro h2 {
            margin: 13px 0 17px;
            font-size: 37px;
            line-height: 1.18;
        }

        .scene-intro p {
            margin: 0;
            color: var(--muted-dark);
        }

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

        .scene-item {
            display: grid;
            grid-template-columns: 60px 1fr;
            gap: 20px;
            padding: 0 0 28px;
            margin-bottom: 28px;
            border-bottom: 1px solid var(--line-light);
        }

        .scene-item:last-child {
            margin-bottom: 0;
        }

        .scene-index {
            display: grid;
            width: 54px;
            height: 54px;
            place-items: center;
            color: var(--ocean);
            background: #dcf8f3;
            border: 1px solid #b7ebe4;
            border-radius: 17px 17px 17px 5px;
            font-size: 18px;
            font-weight: 800;
        }

        .scene-item h3 {
            margin: 1px 0 7px;
            font-size: 19px;
        }

        .scene-item p {
            margin: 0;
            color: var(--muted-dark);
            font-size: 15px;
        }

        .process-section {
            background: var(--paper);
        }

        .process-track {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            position: relative;
            gap: 34px;
        }

        .process-track::before {
            position: absolute;
            top: 28px;
            right: 17%;
            left: 17%;
            height: 1px;
            content: "";
            background: var(--line-light);
        }

        .process-step {
            position: relative;
            z-index: 1;
        }

        .process-dot {
            display: grid;
            width: 57px;
            height: 57px;
            place-items: center;
            margin-bottom: 22px;
            color: var(--ink);
            background: var(--aqua);
            border: 7px solid var(--paper);
            border-radius: 50%;
            box-shadow: 0 0 0 1px var(--aqua);
            font-weight: 800;
        }

        .process-step:nth-child(2) .process-dot {
            background: var(--lime);
        }

        .process-step:nth-child(3) .process-dot {
            background: var(--gold);
        }

        .process-step h3 {
            margin: 0 0 8px;
            font-size: 19px;
        }

        .process-step p {
            max-width: 290px;
            margin: 0;
            color: var(--muted-dark);
            font-size: 14px;
        }

        .trust-strip {
            padding: 30px 0;
            color: var(--white);
            background: var(--ocean);
        }

        .trust-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
        }

        .trust-title {
            margin: 0;
            font-size: 19px;
            font-weight: 750;
        }

        .trust-title i {
            margin-right: 8px;
            color: var(--aqua);
        }

        .trust-points {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .trust-points li {
            padding: 8px 13px;
            color: #c7d9dc;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(138, 244, 232, .2);
            border-radius: 8px;
            font-size: 13px;
        }

        .faq-section {
            background: var(--white);
        }

        .faq-layout {
            display: grid;
            grid-template-columns: .75fr 1.25fr;
            gap: 80px;
            align-items: start;
        }

        .faq-intro h2 {
            margin: 13px 0 17px;
            font-size: 37px;
            line-height: 1.18;
        }

        .faq-intro p {
            margin: 0;
            color: var(--muted-dark);
        }

        .accordion {
            --bs-accordion-border-color: var(--line-light);
            --bs-accordion-btn-focus-box-shadow: 0 0 0 .2rem rgba(19, 216, 196, .16);
            --bs-accordion-active-color: var(--ink);
            --bs-accordion-active-bg: #effbf9;
        }

        .accordion-item {
            margin-bottom: 12px;
            overflow: hidden;
            border: 1px solid var(--line-light) !important;
            border-radius: var(--radius-sm) !important;
        }

        .accordion-button {
            padding: 19px 20px;
            color: var(--ink);
            background: var(--white);
            font-size: 16px;
            font-weight: 750;
            line-height: 1.4;
        }

        .accordion-button:not(.collapsed) {
            box-shadow: none;
        }

        .accordion-button::after {
            background-size: 14px;
        }

        .accordion-body {
            padding: 0 20px 20px;
            color: var(--muted-dark);
            font-size: 15px;
        }

        .cta-section {
            padding: 88px 0;
            color: var(--white);
            background:
                linear-gradient(110deg, rgba(7, 22, 34, .94), rgba(16, 59, 81, .88)),
                url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
        }

        .cta-inner {
            display: grid;
            grid-template-columns: 1fr 390px;
            gap: 70px;
            align-items: center;
        }

        .cta-copy h2 {
            max-width: 650px;
            margin: 14px 0 15px;
            color: var(--white);
            font-size: 39px;
            line-height: 1.16;
        }

        .cta-copy p {
            max-width: 620px;
            margin: 0;
            color: #c7d9dc;
        }

        .download-form {
            padding: 24px;
            background: rgba(7, 22, 34, .67);
            border: 1px solid rgba(138, 244, 232, .3);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-soft);
        }

        .download-form label {
            display: block;
            margin-bottom: 8px;
            color: var(--white);
            font-size: 14px;
            font-weight: 750;
        }

        .download-form input {
            width: 100%;
            min-height: 48px;
            padding: 12px 14px;
            color: var(--white);
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(138, 244, 232, .3);
            border-radius: 10px;
        }

        .download-form input::placeholder {
            color: #9db5bb;
        }

        .download-form input:focus {
            color: var(--white);
            background: rgba(255, 255, 255, .12);
            border-color: var(--aqua);
            box-shadow: 0 0 0 .2rem rgba(19, 216, 196, .12);
            outline: none;
        }

        .download-form .btn {
            width: 100%;
            margin-top: 12px;
        }

        .form-note {
            margin: 12px 0 0;
            color: var(--muted);
            font-size: 12px;
            line-height: 1.5;
        }

        .form-message {
            display: none;
            margin: 12px 0 0;
            color: var(--lime);
            font-size: 13px;
            font-weight: 650;
        }

        .form-message.show {
            display: block;
        }

        .site-footer {
            padding: 65px 0 25px;
            color: #b9d0d3;
            background: #06131d;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
            gap: 38px;
            padding-bottom: 45px;
            border-bottom: 1px solid rgba(138, 244, 232, .13);
        }

        .footer-brand .brand {
            margin-bottom: 17px;
        }

        .footer-brand p {
            max-width: 285px;
            margin: 0;
            color: var(--muted);
            font-size: 14px;
        }

        .footer-title {
            margin-bottom: 15px;
            color: var(--white);
            font-size: 14px;
            font-weight: 800;
        }

        .footer-links {
            display: grid;
            gap: 10px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .footer-links a {
            color: var(--muted);
            font-size: 14px;
        }

        .footer-links a:hover {
            color: var(--aqua);
            padding-left: 3px;
        }

        .footer-trust {
            display: flex;
            flex-direction: column;
            gap: 11px;
            padding-left: 20px;
            border-left: 1px solid rgba(138, 244, 232, .2);
        }

        .footer-trust strong {
            color: var(--aqua-soft);
            font-size: 14px;
        }

        .footer-trust span {
            color: var(--muted);
            font-size: 13px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding-top: 22px;
            color: #718d95;
            font-size: 12px;
        }

        .fab {
            position: fixed;
            z-index: 1050;
            left: 16px;
            bottom: 24px;
            display: grid;
            width: 54px;
            height: 54px;
            place-items: center;
            color: var(--aqua);
            background: rgba(7, 22, 34, .92);
            border: 1px solid var(--aqua);
            border-radius: 16px;
            box-shadow: 0 0 15px rgba(0, 240, 255, .35);
            opacity: .72;
            transition: opacity .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease), color .25s var(--ease);
        }

        .fab:hover {
            color: var(--lime);
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(19, 216, 196, .58);
        }

        .fab:active {
            transform: scale(.95) translateY(2px);
        }

        .fab::after {
            position: absolute;
            top: 5px;
            right: 5px;
            width: 8px;
            height: 8px;
            content: "";
            background: var(--coral);
            border: 2px solid var(--ink);
            border-radius: 50%;
            animation: blink 1.8s infinite;
        }

        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: .35; }
        }

        @media (max-width: 1024px) {
            .nav-shell {
                gap: 18px;
            }

            .nav-link {
                padding-right: 10px;
                padding-left: 10px;
                font-size: 13px;
            }

            .hero h1 {
                font-size: 45px;
            }

            .content-split,
            .scene-layout,
            .faq-layout {
                gap: 45px;
            }

            .footer-grid {
                grid-template-columns: 1.3fr 1fr 1fr;
            }

            .footer-trust {
                grid-column: span 3;
                padding: 20px 0 0;
                border-top: 1px solid rgba(138, 244, 232, .2);
                border-left: 0;
            }
        }

        @media (max-width: 768px) {
            .container {
                width: min(100% - 32px, 620px);
            }

            .nav-shell {
                position: relative;
                min-height: 70px;
                flex-wrap: wrap;
                gap: 12px;
            }

            .brand {
                max-width: 205px;
                font-size: 14px;
            }

            .brand-mark {
                width: 36px;
                height: 36px;
                flex-basis: 36px;
            }

            .menu-toggle {
                display: grid;
                place-items: center;
                margin-left: auto;
            }

            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 10px 0 15px;
                margin: 0;
                border-top: 1px solid rgba(138, 244, 232, .12);
            }

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

            .nav-link {
                padding: 12px 13px;
            }

            .nav-link.active::after {
                right: 13px;
                bottom: 8px;
                left: auto;
                width: 22px;
            }

            .hero {
                min-height: 900px;
                padding: 122px 0 64px;
            }

            .hero-content {
                padding-top: 0;
            }

            .hero h1 {
                margin-top: 15px;
                font-size: 38px;
            }

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

            .hero-aside {
                margin: 42px 0 0;
            }

            .section,
            .section-compact {
                padding: 72px 0;
            }

            .section-heading h2,
            .intro-copy h2,
            .scene-intro h2,
            .faq-intro h2,
            .cta-copy h2 {
                font-size: 31px;
            }

            .content-split,
            .scene-layout,
            .faq-layout,
            .cta-inner {
                grid-template-columns: 1fr;
                gap: 36px;
            }

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

            .feature-card:nth-child(2),
            .feature-card:nth-child(3) {
                margin-top: 0;
            }

            .feature-card {
                min-height: auto;
            }

            .scene-intro {
                position: static;
            }

            .process-track {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .process-track::before {
                top: 24px;
                right: auto;
                bottom: 24px;
                left: 28px;
                width: 1px;
                height: auto;
            }

            .process-step {
                display: grid;
                grid-template-columns: 57px 1fr;
                gap: 17px;
                align-items: start;
            }

            .process-dot {
                margin-bottom: 0;
            }

            .trust-inner {
                align-items: flex-start;
                flex-direction: column;
                gap: 18px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px 22px;
            }

            .footer-brand,
            .footer-trust {
                grid-column: span 2;
            }

            .footer-trust {
                padding-top: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 8px;
            }

            .cta-inner {
                gap: 28px;
            }
        }

        @media (max-width: 520px) {
            .container {
                width: min(100% - 28px, 470px);
            }

            .hero {
                min-height: 920px;
            }

            .hero h1 {
                font-size: 34px;
            }

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

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

            .hero-aside {
                padding: 13px;
            }

            .section-heading,
            .intro-copy {
                margin-bottom: 30px;
            }

            .feature-image,
            .feature-image img {
                min-height: 285px;
            }

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

            .footer-brand,
            .footer-trust {
                grid-column: auto;
            }

            .trust-points {
                display: grid;
                width: 100%;
                grid-template-columns: 1fr 1fr;
            }

            .fab {
                left: 14px;
                bottom: 18px;
            }
        }