/* roulang page: index */
:root {
            --ink: #eef4ff;
            --muted: #9eacc4;
            --deep: #07111f;
            --panel: rgba(18, 34, 57, .72);
            --panel-strong: #10243e;
            --line: rgba(174, 207, 255, .16);
            --blue: #55a9ff;
            --cyan: #62e1db;
            --gold: #f4c66a;
            --radius: 18px;
            --shadow: 0 24px 70px rgba(0, 0, 0, .28);
        }
        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--ink);
            background: var(--deep);
            font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
            line-height: 1.75;
            font-size: 16px;
        }
        a { color: inherit; text-decoration: none; transition: color .25s ease, background .25s ease, transform .25s ease, border-color .25s ease; }
        a:hover { color: var(--cyan); }
        img { max-width: 100%; display: block; }
        button, input { font: inherit; }
        button:focus, a:focus, input:focus { outline: 3px solid rgba(98, 225, 219, .45); outline-offset: 3px; }
        .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(7, 17, 31, .86);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(18px);
        }
        .nav-shell { min-height: 76px; display: flex; align-items: center; gap: 28px; }
        .brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; white-space: nowrap; letter-spacing: 0; }
        .brand-mark {
            width: 34px; height: 34px; display: grid; place-items: center;
            border: 1px solid rgba(98,225,219,.55); border-radius: 10px;
            color: var(--cyan); background: rgba(98,225,219,.09); font-size: 18px;
        }
        .brand-name { font-size: 17px; }
        .main-nav { display: flex; align-items: center; gap: 8px; margin-left: auto; }
        .main-nav a { padding: 9px 14px; color: var(--muted); border-radius: 9px; font-size: 14px; }
        .main-nav a:hover, .main-nav a.active { color: var(--ink); background: rgba(85,169,255,.12); }
        .command-search { width: 190px; position: relative; }
        .command-search input {
            width: 100%; height: 38px; padding: 0 38px 0 13px; color: var(--ink);
            background: rgba(255,255,255,.06); border: 1px solid var(--line); border-radius: 9px;
            box-shadow: none;
        }
        .command-search input::placeholder { color: #7f90ab; }
        .search-key { position: absolute; right: 10px; top: 7px; color: #7f90ab; font-size: 12px; }
        .button {
            border-radius: 10px;
            border: 1px solid transparent;
            font-weight: 700;
            padding: 12px 18px;
            line-height: 1.2;
            transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
        }
        .button:hover { transform: translateY(-2px); color: #fff; }
        .button-primary { background: var(--blue); color: #061322; box-shadow: 0 10px 30px rgba(85,169,255,.26); }
        .button-primary:hover { background: #75baff; box-shadow: 0 14px 34px rgba(85,169,255,.38); }
        .button-ghost { background: rgba(255,255,255,.04); color: var(--ink); border-color: var(--line); }
        .button-ghost:hover { background: rgba(255,255,255,.1); }
        .hero {
            min-height: 650px; position: relative; display: flex; align-items: center;
            background: linear-gradient(90deg, rgba(5,14,25,.98) 12%, rgba(5,14,25,.79) 48%, rgba(5,14,25,.35)), url("https://images.unsplash.com/photo-1489599849927-2ee91cede3ba?auto=format&fit=crop&w=1800&q=88") center/cover;
            overflow: hidden;
        }
        .hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, var(--deep), transparent 28%); pointer-events: none; }
        .hero-content { position: relative; z-index: 1; padding: 90px 0 110px; max-width: 730px; }
        .eyebrow, .badge {
            display: inline-flex; align-items: center; gap: 7px; color: var(--cyan);
            font-size: 13px; font-weight: 700; letter-spacing: .04em;
        }
        .eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 14px var(--cyan); }
        h1, h2, h3, p { margin-top: 0; }
        h1 { margin: 18px 0 22px; font-size: clamp(38px, 5vw, 68px); line-height: 1.12; letter-spacing: 0; max-width: 720px; }
        .hero-copy { max-width: 680px; color: #c4d2e7; font-size: 18px; line-height: 1.85; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 36px; }
        .hero-metrics { display: flex; gap: 34px; flex-wrap: wrap; }
        .metric strong { display: block; color: #fff; font-size: 25px; line-height: 1.2; }
        .metric span { color: var(--muted); font-size: 13px; }
        .section { padding: 100px 0; }
        .section-dark { background: #091728; }
        .section-head { display: flex; justify-content: space-between; gap: 30px; align-items: end; margin-bottom: 38px; }
        .section-head h2 { margin-bottom: 9px; font-size: clamp(28px, 3vw, 42px); line-height: 1.25; }
        .section-head p { color: var(--muted); max-width: 610px; margin-bottom: 0; }
        .directory-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 16px; }
        .directory-card, .glass-card, .quote-card, .news-panel, .form-panel {
            background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
            box-shadow: var(--shadow); backdrop-filter: blur(16px);
        }
        .directory-card { position: relative; min-height: 270px; overflow: hidden; padding: 27px; display: flex; flex-direction: column; justify-content: end; }
        .directory-card:first-child { min-height: 350px; }
        .directory-card::before { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(5,13,24,.93), rgba(5,13,24,.08)); }
        .directory-card > * { position: relative; z-index: 1; }
        .directory-card:nth-child(1) { background: url("https://images.unsplash.com/photo-1517604931442-7e0c8ed2963c?auto=format&fit=crop&w=900&q=80") center/cover; }
        .directory-card:nth-child(2) { background: url("https://images.unsplash.com/photo-1518929458119-e5bf444c30f4?auto=format&fit=crop&w=700&q=80") center/cover; }
        .directory-card:nth-child(3) { background: url("https://images.unsplash.com/photo-1536440136628-849c177e76a1?auto=format&fit=crop&w=700&q=80") center/cover; }
        .directory-card h3 { font-size: 25px; margin-bottom: 5px; }
        .directory-card p { color: #cbd7e8; margin-bottom: 0; font-size: 14px; }
        .card-link { color: var(--cyan); font-size: 14px; margin-top: 16px; }
        .value-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 62px; align-items: center; }
        .value-intro h2 { font-size: 40px; line-height: 1.25; }
        .value-intro p { color: var(--muted); }
        .value-list { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
        .glass-card { padding: 25px; box-shadow: none; }
        .icon-box { width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid rgba(98,225,219,.3); color: var(--cyan); border-radius: 11px; margin-bottom: 18px; }
        .glass-card h3 { font-size: 18px; margin-bottom: 8px; }
        .glass-card p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
        .countdown-band { display: flex; justify-content: space-between; align-items: center; gap: 25px; padding: 27px 30px; border: 1px solid rgba(244,198,106,.32); border-radius: var(--radius); background: linear-gradient(100deg, rgba(244,198,106,.12), rgba(85,169,255,.08)); }
        .countdown-band h2 { font-size: 26px; margin-bottom: 6px; }
        .countdown-band p { color: var(--muted); margin-bottom: 0; }
        .countdown { display: flex; gap: 9px; align-items: center; white-space: nowrap; }
        .time-box { min-width: 58px; text-align: center; padding: 8px 6px; border: 1px solid var(--line); border-radius: 9px; background: rgba(5,14,25,.48); }
        .time-box strong { display: block; color: var(--gold); font-size: 22px; line-height: 1.2; }
        .time-box span { display: block; color: var(--muted); font-size: 11px; }
        .vertical-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
        .vertical-card { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: #102139; transition: transform .25s ease, border-color .25s ease; }
        .vertical-card:hover { transform: translateY(-5px); border-color: rgba(98,225,219,.6); }
        .vertical-cover { aspect-ratio: 4 / 5; background-size: cover; background-position: center; }
        .vertical-card:nth-child(1) .vertical-cover { background-image: url("https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=600&q=80"); }
        .vertical-card:nth-child(2) .vertical-cover { background-image: url("https://images.unsplash.com/photo-1574267432553-4b4628081c31?auto=format&fit=crop&w=600&q=80"); }
        .vertical-card:nth-child(3) .vertical-cover { background-image: url("https://images.unsplash.com/photo-1500534623283-312aade485b7?auto=format&fit=crop&w=600&q=80"); }
        .vertical-card:nth-child(4) .vertical-cover { background-image: url("https://images.unsplash.com/photo-1535016120720-40c646be5580?auto=format&fit=crop&w=600&q=80"); }
        .vertical-body { padding: 17px; }
        .vertical-body h3 { font-size: 17px; margin-bottom: 4px; }
        .vertical-body p { color: var(--muted); font-size: 13px; margin-bottom: 13px; }
        .text-link { color: var(--cyan); font-size: 13px; font-weight: 700; }
        .news-layout { display: grid; grid-template-columns: 1.45fr .8fr; gap: 20px; }
        .news-panel { padding: 25px 30px; }
        .news-item { display: flex; justify-content: space-between; gap: 20px; padding: 19px 0; border-bottom: 1px solid var(--line); }
        .news-item:last-child { border-bottom: 0; padding-bottom: 0; }
        .news-item:first-child { padding-top: 0; }
        .news-item h3 { font-size: 17px; margin-bottom: 4px; }
        .news-item p, .news-date { color: var(--muted); font-size: 13px; margin-bottom: 0; }
        .news-date { white-space: nowrap; }
        .recommend { background: #102b46; padding: 28px; border-radius: var(--radius); border: 1px solid rgba(98,225,219,.25); }
        .recommend h3 { font-size: 23px; }
        .recommend p { color: #b7c9df; font-size: 14px; }
        .tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
        .tag { padding: 6px 10px; border-radius: 7px; color: #bdd7f2; background: rgba(255,255,255,.07); font-size: 12px; }
        .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
        .faq-item { padding: 22px 24px; border: 1px solid var(--line); border-radius: 13px; background: rgba(255,255,255,.035); }
        .faq-item h3 { font-size: 17px; margin-bottom: 8px; }
        .faq-item p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
        .lead-section { background: #0c1d31; }
        .lead-layout { display: grid; grid-template-columns: 1fr .85fr; gap: 45px; align-items: center; }
        .lead-layout h2 { font-size: 39px; line-height: 1.25; }
        .lead-layout p { color: var(--muted); }
        .form-panel { padding: 28px; }
        .form-panel label { color: #d8e5f6; font-size: 13px; margin-bottom: 7px; }
        .form-panel input { background: rgba(255,255,255,.06); border: 1px solid var(--line); color: #fff; border-radius: 9px; box-shadow: none; }
        .form-panel input:focus { background: rgba(255,255,255,.09); border-color: var(--cyan); }
        .form-note { color: #7f91aa; font-size: 12px; margin: 12px 0 0; }
        .site-footer { padding: 42px 0 28px; border-top: 1px solid var(--line); background: #050d18; }
        .footer-grid { display: flex; justify-content: space-between; gap: 30px; }
        .footer-brand p { color: var(--muted); max-width: 390px; font-size: 13px; margin: 15px 0 0; }
        .footer-links { display: flex; gap: 22px; color: var(--muted); font-size: 13px; align-items: start; }
        .copyright { margin-top: 35px; padding-top: 18px; border-top: 1px solid var(--line); color: #687991; font-size: 12px; }
        @media (max-width: 1024px) {
            .main-nav { gap: 2px; }
            .command-search { width: 145px; }
            .directory-grid { grid-template-columns: 1fr 1fr; }
            .directory-card:first-child { grid-column: span 2; }
            .vertical-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .container { width: min(100% - 30px, 620px); }
            .nav-shell { min-height: 68px; gap: 15px; overflow-x: auto; }
            .brand-name { font-size: 15px; }
            .main-nav { order: 3; margin-left: 0; }
            .command-search { display: none; }
            .nav-shell > .button { margin-left: auto; white-space: nowrap; padding: 10px 13px; font-size: 13px; }
            .hero { min-height: 630px; background-position: 62% center; }
            .hero-content { padding: 80px 0 95px; }
            h1 { font-size: 43px; }
            .section { padding: 72px 0; }
            .section-head, .countdown-band, .footer-grid { display: block; }
            .section-head .button, .countdown-band .button { margin-top: 20px; }
            .countdown { margin-top: 20px; }
            .value-layout, .news-layout, .lead-layout { grid-template-columns: 1fr; gap: 28px; }
            .faq-grid { grid-template-columns: 1fr; }
            .footer-links { margin-top: 25px; flex-wrap: wrap; }
        }
        @media (max-width: 520px) {
            .directory-grid, .value-list, .vertical-grid { grid-template-columns: 1fr; }
            .directory-card:first-child { grid-column: auto; }
            .directory-card, .directory-card:first-child { min-height: 245px; }
            h1 { font-size: 36px; }
            .hero-copy { font-size: 16px; }
            .hero-actions .button { width: 100%; text-align: center; }
            .hero-metrics { gap: 20px; }
            .value-intro h2, .lead-layout h2 { font-size: 31px; }
            .news-panel { padding: 22px; }
            .news-item { display: block; }
            .news-date { display: block; margin-top: 7px; }
            .countdown { gap: 5px; }
            .time-box { min-width: 48px; }
        }