/* roulang page: index */
:root {
            --ink: #17202d;
            --muted: #687385;
            --paper: #f6f7f9;
            --white: #ffffff;
            --line: #e4e8ee;
            --navy: #111827;
            --coral: #e96c55;
            --coral-dark: #c9503f;
            --gold: #d8a64b;
            --green: #26836c;
            --radius: 16px;
            --shadow: 0 16px 42px rgba(23, 32, 45, .08);
            --container: 1180px;
        }

        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--ink);
            background: var(--paper);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            letter-spacing: 0;
        }
        a { color: inherit; text-decoration: none; transition: color .2s ease, background .2s ease, border-color .2s ease, transform .2s ease; }
        img { display: block; width: 100%; max-width: 100%; }
        button, input { font: inherit; }
        button { cursor: pointer; }
        :focus-visible { outline: 3px solid rgba(233,108,85,.35); outline-offset: 3px; }
        .container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--coral-dark);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .08em;
        }
        .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--coral); }
        h1, h2, h3, p { margin-top: 0; }
        h1, h2, h3 { line-height: 1.25; }
        h1 { margin-bottom: 22px; font-size: clamp(38px, 5vw, 68px); letter-spacing: 0; }
        h2 { margin-bottom: 14px; font-size: clamp(28px, 3vw, 42px); }
        h3 { margin-bottom: 8px; font-size: 19px; }
        .section { padding: 92px 0; }
        .section--white { background: var(--white); }
        .section--dark { color: #fff; background: var(--navy); }
        .section-heading { display: flex; justify-content: space-between; gap: 32px; align-items: end; margin-bottom: 34px; }
        .section-heading p { max-width: 620px; margin: 0; color: var(--muted); }
        .section--dark .section-heading p { color: #b6c0cf; }
        .accent { color: var(--coral); }
        .muted { color: var(--muted); }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(255,255,255,.94);
            border-bottom: 1px solid rgba(228,232,238,.9);
            backdrop-filter: blur(18px);
        }
        .nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
        .brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; white-space: nowrap; }
        .brand-mark {
            width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
            color: #fff; background: var(--coral); font-size: 16px; box-shadow: 0 8px 18px rgba(233,108,85,.25);
        }
        .brand-name { font-size: 17px; }
        .main-nav { display: flex; align-items: center; gap: 4px; }
        .main-nav a { padding: 9px 14px; color: var(--muted); font-size: 14px; border-radius: 9px; }
        .main-nav a:hover, .main-nav a.active { color: var(--ink); background: #f0f2f5; }
        .nav-cta { padding: 10px 16px; color: #fff !important; background: var(--navy) !important; }
        .nav-cta:hover { background: var(--coral) !important; transform: translateY(-1px); }
        .nav-toggle { display: none; border: 0; color: var(--ink); background: transparent; font-size: 26px; }

        .hero {
            position: relative;
            overflow: hidden;
            min-height: 650px;
            display: flex;
            align-items: center;
            color: #fff;
            background:
                linear-gradient(90deg, rgba(17,24,39,.98) 0%, rgba(17,24,39,.92) 46%, rgba(17,24,39,.58) 100%),
                url("https://images.unsplash.com/photo-1489599849927-2ee91cede3ba?auto=format&fit=crop&w=1800&q=85") center/cover;
        }
        .hero::after { content: ""; position: absolute; inset: auto 0 0; height: 120px; background: linear-gradient(transparent, var(--paper)); opacity: .28; pointer-events: none; }
        .hero-content { position: relative; z-index: 1; max-width: 700px; padding: 105px 0 130px; }
        .hero .eyebrow { color: #f4b6a8; }
        .hero h1 { max-width: 680px; }
        .hero h1 .accent { color: #ff9b86; }
        .hero-lead { max-width: 650px; margin-bottom: 30px; color: #d5dbe4; font-size: 18px; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 38px; }
        .button {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            min-height: 48px; padding: 11px 20px; border: 1px solid transparent; border-radius: 10px;
            font-weight: 700; font-size: 15px; transition: all .2s ease;
        }
        .button:hover { transform: translateY(-2px); }
        .button--primary { color: #fff; background: var(--coral); box-shadow: 0 10px 22px rgba(233,108,85,.25); }
        .button--primary:hover { background: var(--coral-dark); }
        .button--ghost { color: #fff; border-color: rgba(255,255,255,.35); background: rgba(255,255,255,.08); }
        .button--ghost:hover { background: rgba(255,255,255,.16); }
        .hero-proof { display: flex; flex-wrap: wrap; gap: 24px; color: #d5dbe4; font-size: 14px; }
        .hero-proof strong { display: block; color: #fff; font-size: 22px; }
        .hero-panel {
            position: absolute; z-index: 1; right: max(40px, calc((100vw - var(--container)) / 2)); bottom: 100px;
            width: 260px; padding: 22px; border: 1px solid rgba(255,255,255,.16); border-radius: 16px;
            color: #fff; background: rgba(17,24,39,.65); box-shadow: 0 20px 50px rgba(0,0,0,.25); backdrop-filter: blur(14px);
        }
        .hero-panel small { color: #aeb8c8; }
        .panel-line { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.12); font-size: 14px; }
        .panel-line:last-child { border: 0; }
        .panel-line b { color: #ffb09d; }

        .notice-bar { padding: 17px 0; color: #634d27; background: #fff7e8; border-bottom: 1px solid #f2dfb6; }
        .notice-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
        .notice-inner p { margin: 0; font-size: 14px; }
        .notice-inner strong { color: #a16f18; }

        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .feature-item { padding: 26px; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); }
        .feature-icon { width: 42px; height: 42px; display: grid; place-items: center; margin-bottom: 18px; border-radius: 12px; color: var(--coral-dark); background: #fff0ed; font-size: 20px; }
        .feature-item p { margin-bottom: 0; color: var(--muted); font-size: 14px; }

        .content-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 34px; align-items: start; }
        .media-card { overflow: hidden; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
        .media-card img { aspect-ratio: 16/9; object-fit: cover; }
        .media-body { padding: 22px; }
        .media-body p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
        .check-list { margin: 0; padding: 0; list-style: none; }
        .check-list li { display: flex; gap: 12px; padding: 15px 0; border-bottom: 1px solid var(--line); color: #4f5b6d; }
        .check-list li::before { content: "✓"; flex: 0 0 24px; width: 24px; height: 24px; display: grid; place-items: center; border-radius: 50%; color: var(--green); background: #e7f5f0; font-weight: 800; }

        .badge-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
        .badge-card { padding: 22px 18px; text-align: center; border: 1px solid var(--line); border-radius: 12px; background: var(--white); }
        .badge-card b { display: block; margin-bottom: 5px; color: var(--navy); }
        .badge-card span { color: var(--muted); font-size: 13px; }

        .boundary { display: grid; grid-template-columns: .8fr 1.2fr; gap: 52px; align-items: center; }
        .boundary-copy p { color: #b9c3d0; }
        .boundary-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
        .boundary-list div { padding: 18px; border: 1px solid rgba(255,255,255,.12); border-radius: 12px; color: #dce2eb; background: rgba(255,255,255,.05); }
        .boundary-list b { display: block; margin-bottom: 4px; color: #ffab98; }
        .boundary-list span { color: #aeb8c8; font-size: 13px; }

        .topic-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
        .topic-card { min-height: 180px; padding: 22px; border-radius: 14px; color: #fff; background: #2a3445; transition: transform .2s ease, background .2s ease; }
        .topic-card:nth-child(2) { background: #315a5d; }
        .topic-card:nth-child(3) { background: #634f3d; }
        .topic-card:nth-child(4) { background: #4d4665; }
        .topic-card:hover { transform: translateY(-4px); background: var(--coral-dark); }
        .topic-card p { margin: 0; color: rgba(255,255,255,.72); font-size: 13px; }

        .news-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .news-card { overflow: hidden; background: var(--white); border: 1px solid var(--line); border-radius: 14px; }
        .news-card img { aspect-ratio: 16/9; object-fit: cover; }
        .news-body { padding: 18px; }
        .news-meta { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 8px; color: var(--muted); font-size: 12px; }
        .news-body h3 { font-size: 17px; }
        .news-body p { margin: 0; color: var(--muted); font-size: 13px; }

        .quote-section { background: #fff8f5; }
        .quote-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; align-items: stretch; }
        .quote-main { padding: 32px; border-left: 4px solid var(--coral); background: #fff; box-shadow: var(--shadow); }
        .quote-main blockquote { margin: 0 0 20px; font-size: clamp(22px, 3vw, 32px); line-height: 1.5; }
        .quote-main cite { color: var(--muted); font-size: 14px; font-style: normal; }
        .quote-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
        .stat { padding: 24px; border: 1px solid #f0ddd7; background: #fff; }
        .stat strong { display: block; color: var(--coral-dark); font-size: 28px; }
        .stat span { color: var(--muted); font-size: 13px; }

        .faq-list { max-width: 900px; margin: 0 auto; }
        .faq-item { border-bottom: 1px solid var(--line); }
        .faq-item summary { display: flex; justify-content: space-between; gap: 20px; padding: 21px 0; cursor: pointer; list-style: none; font-weight: 700; }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after { content: "+"; color: var(--coral); font-size: 22px; line-height: 1; }
        .faq-item[open] summary::after { content: "−"; }
        .faq-item p { max-width: 780px; margin: -4px 0 20px; color: var(--muted); font-size: 14px; }

        .final-cta { padding: 64px 0; color: #fff; background: var(--coral); }
        .final-cta-inner { display: flex; justify-content: space-between; align-items: center; gap: 28px; }
        .final-cta h2 { margin-bottom: 8px; }
        .final-cta p { max-width: 650px; margin: 0; color: #ffe8e1; }
        .final-cta .button--ghost { border-color: rgba(255,255,255,.6); background: rgba(255,255,255,.08); }

        .site-footer { padding: 58px 0 24px; color: #aeb8c8; background: var(--navy); }
        .footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 30px; padding-bottom: 42px; }
        .footer-brand { color: #fff; }
        .footer-brand p { max-width: 290px; margin-top: 16px; color: #aeb8c8; font-size: 14px; }
        .footer-col h3 { margin-bottom: 14px; color: #fff; font-size: 15px; }
        .footer-col a { display: block; padding: 3px 0; color: #aeb8c8; font-size: 14px; }
        .footer-col a:hover { color: #ffad9c; }
        .copyright { padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); color: #8793a5; font-size: 12px; }

        @media (max-width: 1024px) {
            .hero-panel { right: 28px; width: 230px; }
            .topic-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1.5fr repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .container { width: min(var(--container), calc(100% - 32px)); }
            .section { padding: 68px 0; }
            .nav-wrap { min-height: 68px; }
            .nav-toggle { display: block; }
            .main-nav { display: none; position: absolute; top: 68px; left: 0; right: 0; padding: 12px 16px 18px; flex-direction: column; align-items: stretch; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 12px 24px rgba(23,32,45,.08); }
            .main-nav.is-open { display: flex; }
            .main-nav a { padding: 12px 14px; }
            .hero { min-height: 640px; background-position: 62% center; }
            .hero-content { padding: 86px 0 110px; }
            .hero-panel { display: none; }
            .section-heading, .final-cta-inner { display: block; }
            .section-heading p { margin-top: 14px; }
            .feature-grid, .news-list { grid-template-columns: 1fr; }
            .content-grid, .boundary, .quote-grid { grid-template-columns: 1fr; gap: 24px; }
            .badge-row { grid-template-columns: repeat(2, 1fr); }
            .final-cta .button { margin-top: 22px; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            h1 { font-size: 38px; }
            h2 { font-size: 29px; }
            .hero-lead { font-size: 16px; }
            .hero-actions { flex-direction: column; align-items: stretch; }
            .hero-actions .button { width: 100%; }
            .hero-proof { gap: 14px; }
            .notice-inner { align-items: start; flex-direction: column; gap: 6px; }
            .boundary-list, .topic-grid, .quote-stats, .footer-grid { grid-template-columns: 1fr; }
            .badge-row { gap: 10px; }
            .badge-card { padding: 17px 10px; }
            .footer-brand { grid-column: auto; }
        }