/* roulang page: index */
:root {
            --ink: #12233f;
            --muted: #60708c;
            --soft: #f4f8fd;
            --line: #dbe5f2;
            --blue: #1769e0;
            --blue-dark: #0e4ca8;
            --cyan: #14b8c4;
            --yellow: #f7c948;
            --white: #ffffff;
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 28px;
            --shadow-sm: 0 8px 24px rgba(24, 63, 112, .08);
            --shadow-md: 0 20px 48px rgba(25, 70, 125, .14);
            --shadow-blue: 0 14px 34px rgba(23, 105, 224, .22);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            color: var(--ink);
            background: var(--white);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button, input {
            font: inherit;
        }

        button {
            cursor: pointer;
        }

        :focus-visible {
            outline: 3px solid rgba(20, 184, 196, .5);
            outline-offset: 3px;
        }

        .container {
            width: min(1160px, calc(100% - 40px));
            margin: 0 auto;
        }

        .topbar {
            position: sticky;
            top: 0;
            z-index: 30;
            background: rgba(9, 25, 49, .96);
            border-bottom: 1px solid rgba(117, 180, 255, .2);
            box-shadow: 0 8px 25px rgba(5, 17, 34, .15);
            backdrop-filter: blur(16px);
        }

        .nav-shell {
            min-height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            color: #fff;
            font-weight: 800;
            letter-spacing: 0;
            white-space: nowrap;
        }

        .brand-mark {
            width: 34px;
            height: 34px;
            display: grid;
            place-items: center;
            border-radius: 10px;
            color: #09203e;
            background: var(--cyan);
            box-shadow: 0 0 22px rgba(20, 184, 196, .55);
            font-weight: 900;
        }

        .brand-text {
            font-size: 16px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            position: relative;
            padding: 9px 16px;
            color: #b9c8dd;
            border-radius: 8px;
            transition: color .2s ease, background .2s ease;
        }

        .nav-link::after {
            position: absolute;
            content: "";
            left: 16px;
            right: 16px;
            bottom: 3px;
            height: 2px;
            background: var(--cyan);
            transform: scaleX(0);
            transition: transform .2s ease;
        }

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

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 17px;
            border: 1px solid rgba(20, 184, 196, .7);
            border-radius: 9px;
            color: #dffcff;
            background: rgba(20, 184, 196, .12);
            transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
        }

        .nav-cta:hover {
            background: rgba(20, 184, 196, .24);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(20, 184, 196, .18);
        }

        .mobile-toggle {
            display: none;
            border: 1px solid rgba(255,255,255,.2);
            border-radius: 8px;
            padding: 8px 11px;
            color: #fff;
            background: transparent;
        }

        .hero {
            position: relative;
            overflow: hidden;
            min-height: 610px;
            display: flex;
            align-items: center;
            background:
                radial-gradient(circle at 80% 18%, rgba(20,184,196,.2), transparent 28%),
                linear-gradient(120deg, #081a35 0%, #103d78 58%, #125b91 100%);
            color: #fff;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: auto -10% -120px 40%;
            height: 280px;
            border-top: 1px solid rgba(133, 226, 239, .25);
            border-radius: 50%;
            transform: rotate(-8deg);
        }

        .hero-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr);
            gap: 70px;
            align-items: center;
            padding: 84px 0 92px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
            padding: 6px 11px;
            border: 1px solid rgba(118, 230, 238, .35);
            border-radius: 999px;
            color: #b9f9fb;
            background: rgba(20,184,196,.1);
            font-size: 13px;
            font-weight: 700;
        }

        .eyebrow-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--cyan);
            box-shadow: 0 0 12px var(--cyan);
        }

        h1, h2, h3, p {
            margin-top: 0;
        }

        h1 {
            max-width: 680px;
            margin-bottom: 22px;
            font-size: clamp(38px, 5vw, 66px);
            line-height: 1.18;
            letter-spacing: 0;
        }

        .hero-copy {
            max-width: 650px;
            margin-bottom: 30px;
            color: #d5e4f7;
            font-size: 18px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 48px;
            padding: 0 20px;
            border: 1px solid transparent;
            border-radius: 9px;
            font-weight: 800;
            transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
        }

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

        .btn-primary {
            color: #08213d;
            background: var(--cyan);
            box-shadow: 0 10px 25px rgba(20,184,196,.25);
        }

        .btn-primary:hover {
            background: #53d5da;
            box-shadow: 0 14px 30px rgba(20,184,196,.38);
        }

        .btn-light {
            color: #fff;
            border-color: rgba(255,255,255,.28);
            background: rgba(255,255,255,.08);
        }

        .btn-light:hover {
            background: rgba(255,255,255,.16);
        }

        .hero-points {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            color: #b9cbe2;
            font-size: 14px;
        }

        .hero-point strong {
            display: block;
            margin-bottom: 2px;
            color: #fff;
            font-size: 22px;
            line-height: 1.2;
        }

        .apply-panel {
            padding: 28px;
            border: 1px solid rgba(255,255,255,.2);
            border-radius: var(--radius-lg);
            background: rgba(255,255,255,.1);
            box-shadow: var(--shadow-md);
            backdrop-filter: blur(18px);
        }

        .apply-panel h2 {
            margin-bottom: 8px;
            font-size: 24px;
        }

        .apply-panel > p {
            margin-bottom: 21px;
            color: #c6d8ed;
            font-size: 14px;
        }

        .field {
            display: grid;
            gap: 7px;
            margin-bottom: 14px;
        }

        .field label {
            color: #dce9f7;
            font-size: 13px;
            font-weight: 700;
        }

        .field input {
            width: 100%;
            min-height: 45px;
            padding: 0 13px;
            border: 1px solid rgba(255,255,255,.24);
            border-radius: 8px;
            color: #fff;
            background: rgba(4,18,39,.28);
        }

        .field input::placeholder {
            color: #91a9c6;
        }

        .apply-panel .btn {
            width: 100%;
            margin-top: 6px;
        }

        .section {
            padding: 102px 0;
        }

        .section-tint {
            background: var(--soft);
        }

        .section-head {
            max-width: 680px;
            margin-bottom: 42px;
        }

        .section-kicker {
            display: block;
            margin-bottom: 10px;
            color: var(--blue);
            font-size: 13px;
            font-weight: 900;
            letter-spacing: .08em;
        }

        .section-head h2 {
            margin-bottom: 13px;
            font-size: clamp(29px, 4vw, 44px);
            line-height: 1.25;
        }

        .section-head p {
            color: var(--muted);
            font-size: 17px;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .feature-card {
            position: relative;
            min-height: 250px;
            padding: 28px;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
            transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
        }

        .feature-card:hover {
            transform: translateY(-5px);
            border-color: #b7d0ee;
            box-shadow: var(--shadow-md);
        }

        .feature-number {
            display: inline-grid;
            place-items: center;
            width: 38px;
            height: 38px;
            margin-bottom: 23px;
            border-radius: 10px;
            color: var(--blue-dark);
            background: #e7f1ff;
            font-weight: 900;
        }

        .feature-card h3 {
            margin-bottom: 10px;
            font-size: 21px;
        }

        .feature-card p {
            color: var(--muted);
            font-size: 15px;
        }

        .scene {
            display: grid;
            grid-template-columns: .92fr 1.08fr;
            gap: 54px;
            align-items: center;
        }

        .scene-visual {
            min-height: 390px;
            padding: 26px;
            border-radius: var(--radius-lg);
            background: #0d274b;
            box-shadow: var(--shadow-md);
        }

        .visual-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 18px;
            color: #b8cce6;
            font-size: 13px;
        }

        .status {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            color: #83f0dc;
        }

        .status::before {
            content: "";
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #52e0bc;
            box-shadow: 0 0 10px #52e0bc;
        }

        .visual-main {
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 13px;
        }

        .visual-block {
            min-height: 145px;
            padding: 20px;
            border: 1px solid rgba(150, 201, 249, .18);
            border-radius: 14px;
            background: rgba(255,255,255,.07);
        }

        .visual-block.large {
            grid-row: span 2;
            min-height: 300px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            background:
                linear-gradient(180deg, transparent 35%, rgba(4,15,33,.78)),
                linear-gradient(135deg, #2b75a4, #16274d 70%);
        }

        .visual-block small {
            color: #9fb9d8;
        }

        .visual-block strong {
            display: block;
            margin-top: 8px;
            color: #fff;
            font-size: 20px;
        }

        .scene-copy h2 {
            margin-bottom: 16px;
            font-size: 35px;
            line-height: 1.3;
        }

        .scene-copy > p {
            color: var(--muted);
        }

        .check-list {
            display: grid;
            gap: 14px;
            margin: 25px 0 30px;
            padding: 0;
            list-style: none;
        }

        .check-list li {
            display: flex;
            gap: 11px;
            color: #334866;
        }

        .check-list li::before {
            content: "✓";
            flex: 0 0 23px;
            height: 23px;
            display: grid;
            place-items: center;
            border-radius: 50%;
            color: var(--blue-dark);
            background: #dcecff;
            font-size: 13px;
            font-weight: 900;
        }

        .proof-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1px;
            overflow: hidden;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: var(--line);
            box-shadow: var(--shadow-sm);
        }

        .proof-item {
            padding: 28px 24px;
            background: #fff;
        }

        .proof-item strong {
            display: block;
            margin-bottom: 6px;
            color: var(--blue-dark);
            font-size: 31px;
            line-height: 1.2;
        }

        .proof-item span {
            color: var(--muted);
            font-size: 14px;
        }

        .timeline {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .timeline-item {
            position: relative;
            padding: 25px 24px 24px 56px;
            border-left: 3px solid #c6ddf8;
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .timeline-item::before {
            position: absolute;
            content: "";
            left: -10px;
            top: 29px;
            width: 17px;
            height: 17px;
            border: 4px solid var(--white);
            border-radius: 50%;
            background: var(--blue);
            box-shadow: 0 0 0 1px #afd0f5;
        }

        .timeline-item time {
            color: var(--blue);
            font-size: 13px;
            font-weight: 900;
        }

        .timeline-item h3 {
            margin: 7px 0 8px;
            font-size: 19px;
        }

        .timeline-item p {
            margin-bottom: 0;
            color: var(--muted);
            font-size: 14px;
        }

        .quote-band {
            padding: 34px;
            border-radius: var(--radius-lg);
            color: #fff;
            background: linear-gradient(110deg, #103b76, #1769e0);
            box-shadow: var(--shadow-blue);
        }

        .quote-band blockquote {
            max-width: 820px;
            margin: 0 0 15px;
            font-size: clamp(21px, 3vw, 30px);
            font-weight: 700;
            line-height: 1.45;
        }

        .quote-band cite {
            color: #cae4ff;
            font-size: 14px;
            font-style: normal;
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.25fr .75fr;
            gap: 28px;
        }

        .news-list,
        .news-aside {
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .news-list {
            padding: 10px 25px;
        }

        .news-item {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--line);
        }

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

        .news-item a {
            color: var(--ink);
            font-weight: 800;
            transition: color .2s ease;
        }

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

        .news-item p {
            margin: 5px 0 0;
            color: var(--muted);
            font-size: 14px;
        }

        .news-date {
            flex: 0 0 auto;
            color: #8a9bb2;
            font-size: 13px;
        }

        .news-aside {
            padding: 26px;
            background: #f7fbff;
        }

        .news-aside h3 {
            margin-bottom: 17px;
            font-size: 20px;
        }

        .topic {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 13px 0;
            border-bottom: 1px solid var(--line);
            color: #37516f;
            font-weight: 700;
        }

        .topic:last-child {
            border-bottom: 0;
        }

        .topic b {
            color: var(--blue);
            font-size: 13px;
        }

        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 14px;
        }

        details {
            padding: 20px 22px;
            border: 1px solid var(--line);
            border-radius: 12px;
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        summary {
            cursor: pointer;
            list-style: none;
            color: var(--ink);
            font-weight: 800;
        }

        summary::-webkit-details-marker {
            display: none;
        }

        summary::after {
            content: "+";
            float: right;
            color: var(--blue);
            font-size: 22px;
            line-height: 1;
        }

        details[open] summary::after {
            content: "−";
        }

        details p {
            margin: 13px 0 0;
            color: var(--muted);
            font-size: 14px;
        }

        .cta {
            padding: 78px 0;
            background: #eaf4ff;
        }

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

        .cta h2 {
            margin-bottom: 10px;
            font-size: clamp(28px, 4vw, 42px);
        }

        .cta p {
            max-width: 650px;
            margin-bottom: 0;
            color: var(--muted);
        }

        .cta .btn-primary {
            flex: 0 0 auto;
            color: #fff;
            background: var(--blue);
        }

        .cta .btn-primary:hover {
            background: var(--blue-dark);
        }

        footer {
            color: #a9bdd7;
            background: #091a34;
        }

        .footer-main {
            display: flex;
            justify-content: space-between;
            gap: 50px;
            padding: 58px 0 38px;
        }

        .footer-brand {
            max-width: 370px;
        }

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

        .footer-brand p {
            color: #8fa7c5;
            font-size: 14px;
        }

        .footer-links {
            display: flex;
            gap: 65px;
        }

        .footer-links h3 {
            margin-bottom: 14px;
            color: #fff;
            font-size: 15px;
        }

        .footer-links a {
            display: block;
            margin: 8px 0;
            color: #9eb4d1;
            font-size: 14px;
            transition: color .2s ease;
        }

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

        .footer-bottom {
            padding: 20px 0;
            border-top: 1px solid rgba(173, 205, 241, .14);
            color: #8198b6;
            font-size: 13px;
        }

        @media (max-width: 1024px) {
            .hero-grid {
                gap: 35px;
            }

            .scene {
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .container {
                width: min(100% - 30px, 600px);
            }

            .nav-shell {
                min-height: 68px;
            }

            .mobile-toggle {
                display: block;
            }

            .nav-links {
                position: absolute;
                top: 68px;
                left: 15px;
                right: 15px;
                display: none;
                padding: 12px;
                border: 1px solid rgba(117, 180, 255, .2);
                border-radius: 12px;
                background: #0b2344;
                box-shadow: var(--shadow-md);
            }

            .nav-links.open {
                display: grid;
            }

            .nav-link,
            .nav-cta {
                width: 100%;
            }

            .hero {
                min-height: auto;
            }

            .hero-grid,
            .scene,
            .news-layout {
                grid-template-columns: 1fr;
            }

            .hero-grid {
                padding: 64px 0 70px;
            }

            .hero h1 {
                font-size: 43px;
            }

            .apply-panel {
                max-width: 600px;
            }

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

            .section {
                padding: 70px 0;
            }

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

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

        @media (max-width: 520px) {
            .brand-text {
                max-width: 190px;
                overflow: hidden;
                text-overflow: ellipsis;
            }

            .hero h1 {
                font-size: 36px;
            }

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

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

            .hero-points {
                gap: 16px;
            }

            .feature-grid,
            .timeline,
            .proof-grid,
            .visual-main {
                grid-template-columns: 1fr;
            }

            .visual-block.large {
                grid-row: auto;
                min-height: 220px;
            }

            .scene-visual {
                min-height: auto;
                padding: 18px;
            }

            .news-list {
                padding: 8px 17px;
            }

            .news-item {
                display: block;
            }

            .news-date {
                display: block;
                margin-top: 7px;
            }

            .footer-links {
                width: 100%;
                justify-content: space-between;
                gap: 20px;
            }
        }