:root {
    --bg: #f6f8fb;
    --surface: #ffffff;
    --surface-soft: #eef3f7;
    --text: #17212b;
    --muted: #5f6f7d;
    --line: #dce5ed;
    --brand: #184b63;
    --brand-dark: #0f3143;
    --accent: #d69c3d;
    --shadow: 0 18px 45px rgba(19, 49, 67, 0.12);
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; display: block; }
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; }
.topline { padding: 8px 5vw; background: var(--brand-dark); color: #fff; font-size: 14px; }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 16px 5vw; }
.brand-logo { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; color: var(--brand-dark); font-size: 22px; }
.brand-logo img { border-radius: 16px; box-shadow: var(--shadow); }
.nav-list { display: flex; align-items: center; gap: 16px; list-style: none; padding: 0; margin: 0; font-size: 15px; }
.nav-list a { color: var(--muted); font-weight: 650; }
.nav-list a:hover { color: var(--brand); }
.nav-toggle { display: none; border: 1px solid var(--line); background: var(--surface); padding: 8px 12px; border-radius: 10px; }
.search-box { display: grid; grid-template-columns: auto minmax(180px, 1fr) auto; gap: 10px; align-items: center; padding: 0 5vw 16px; }
.search-box label { color: var(--brand-dark); font-weight: 700; }
.search-box input { border: 1px solid var(--line); border-radius: 12px; padding: 11px 14px; font-size: 15px; }
.search-box button, .btn { border: 0; border-radius: 999px; padding: 12px 18px; font-weight: 800; cursor: pointer; }
.search-box button, .btn.primary { background: var(--brand); color: #fff; }
.btn.secondary { background: var(--surface-soft); color: var(--brand-dark); }
.search-tip { grid-column: 2 / 4; margin: 0; color: var(--muted); font-size: 13px; }
.brand-section { padding: 72px 5vw; max-width: 1240px; margin: 0 auto; }
.brand-section.muted { max-width: none; background: var(--surface-soft); }
.brand-section.muted > * { max-width: 1240px; margin-left: auto; margin-right: auto; }
.hero { display: grid; grid-template-columns: 1.1fr 0.9fr; align-items: center; gap: 42px; min-height: 680px; }
.eyebrow { color: var(--accent); font-weight: 900; letter-spacing: 0.06em; }
h1, h2, h3 { line-height: 1.25; color: var(--brand-dark); margin: 0 0 16px; }
h1 { font-size: clamp(34px, 5vw, 60px); }
h2 { font-size: clamp(26px, 3vw, 38px); }
h3 { font-size: 20px; }
.hero-subtitle, .section-lead, .page-hero p { font-size: 18px; color: var(--muted); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 28px 0; }
.metric-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding: 0; margin: 26px 0; list-style: none; }
.metric-list li { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 16px; box-shadow: var(--shadow); }
.metric-list strong { display: block; font-size: 25px; color: var(--brand); }
.metric-list span { color: var(--muted); }
.consult-summary { border-left: 4px solid var(--accent); padding-left: 16px; color: var(--muted); }
.hero-card, .wide-figure { background: var(--surface); border: 1px solid var(--line); border-radius: 28px; padding: 14px; box-shadow: var(--shadow); margin: 0; }
.hero-card img, .wide-figure img { border-radius: 20px; width: 100%; }
figcaption { color: var(--muted); font-size: 14px; margin-top: 10px; }
.card-grid { display: grid; gap: 18px; margin-top: 28px; }
.card-grid.three { grid-template-columns: repeat(3, 1fr); }
.card-grid.four { grid-template-columns: repeat(4, 1fr); }
.info-card, .scenario-card, .review-card, .video-card, .timeline article { background: var(--surface); border: 1px solid var(--line); border-radius: 24px; padding: 24px; box-shadow: 0 10px 28px rgba(19, 49, 67, 0.08); }
.card-icon { display: inline-grid; place-items: center; min-width: 52px; height: 52px; border-radius: 16px; background: var(--surface-soft); color: var(--brand); font-weight: 900; margin-bottom: 14px; }
.video-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 28px; }
.video-card { overflow: hidden; padding: 0; }
.video-frame { position: relative; background: #0c1c28; aspect-ratio: 16 / 10; overflow: hidden; }
.video-frame video { width: 100%; height: 100%; object-fit: cover; }
.play-button { position: absolute; inset: 0; display: grid; place-items: center; color: #fff; font-size: 42px; opacity: 0; transition: opacity .2s ease, transform .2s ease; text-shadow: 0 8px 28px rgba(0,0,0,.35); }
.video-card:hover .play-button, .video-card.is-hover .play-button { opacity: 1; transform: scale(1.08); }
.duration { position: absolute; right: 12px; bottom: 12px; background: rgba(0,0,0,.68); color: #fff; padding: 4px 8px; border-radius: 8px; font-size: 12px; }
.video-body { padding: 20px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px; }
.tag-list span { background: var(--surface-soft); color: var(--brand); border-radius: 999px; padding: 3px 9px; font-size: 12px; font-weight: 700; }
.video-stats { color: var(--muted); font-size: 14px; }
.profile-card img { width: 72px; height: 72px; object-fit: cover; border-radius: 22px; margin-bottom: 14px; }
.process-list { counter-reset: steps; display: grid; gap: 12px; padding: 0; margin: 28px 0 0; list-style: none; }
.process-list li { display: flex; align-items: center; gap: 14px; background: var(--surface); border: 1px solid var(--line); padding: 16px 18px; border-radius: 18px; }
.process-list span { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--brand); color: #fff; font-weight: 900; }
.timeline { display: grid; gap: 16px; margin-top: 28px; }
.timeline time { color: var(--accent); font-weight: 900; }
.faq-list { display: grid; gap: 12px; margin-top: 28px; }
details { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 18px 20px; }
summary { cursor: pointer; font-weight: 800; color: var(--brand-dark); }
.review-card blockquote { margin: 0 0 16px; color: var(--muted); }
.stars { color: var(--accent); font-weight: 900; }
.contact-panel { display: flex; align-items: center; justify-content: space-between; gap: 24px; background: linear-gradient(135deg, var(--brand-dark), var(--brand)); color: #fff; border-radius: 32px; margin-top: 64px; margin-bottom: 64px; }
.contact-panel h2, .contact-panel .eyebrow { color: #fff; }
.contact-panel p { color: rgba(255,255,255,.86); }
.breadcrumb { max-width: 1240px; margin: 28px auto 0; padding: 0 5vw; color: var(--muted); display: flex; gap: 10px; }
.page-hero { padding-top: 48px; padding-bottom: 48px; }
.case-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 28px; align-items: center; margin-top: 28px; }
.case-layout figure { margin: 0; }
.case-layout img { border-radius: 24px; }
.check-list { padding-left: 20px; color: var(--muted); }
.site-footer { background: var(--brand-dark); color: #fff; padding: 48px 5vw; }
.footer-grid { max-width: 1240px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1.4fr 1.4fr; gap: 28px; align-items: start; }
.site-footer h2 { color: #fff; font-size: 18px; }
.site-footer p, .site-footer a { color: rgba(255,255,255,.78); }
.footer-logo span { color: #fff; }
@media (max-width: 980px) {
    .hero, .case-layout, .footer-grid { grid-template-columns: 1fr; }
    .card-grid.three, .card-grid.four, .video-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-toggle { display: inline-block; }
    .nav-list { display: none; position: absolute; left: 5vw; right: 5vw; top: 110px; background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 18px; box-shadow: var(--shadow); flex-direction: column; align-items: flex-start; }
    .nav-list.open { display: flex; }
    .search-box { grid-template-columns: 1fr; }
    .search-tip { grid-column: auto; }
}
@media (max-width: 640px) {
    .brand-section { padding: 48px 18px; }
    .hero { min-height: auto; }
    .card-grid.three, .card-grid.four, .video-grid, .metric-list { grid-template-columns: 1fr; }
    .nav-wrap, .search-box, .topline { padding-left: 18px; padding-right: 18px; }
    .contact-panel { align-items: flex-start; flex-direction: column; border-radius: 24px; }
}