:root {
  --bg: #f7f5f0;
  --surface: #ffffff;
  --ink: #161b22;
  --muted: #68707c;
  --line: rgba(22,27,34,.11);
  --soft: rgba(22,27,34,.055);
  --brand: #b98c42;
  --brand-dark: #2b3746;
  --radius: 28px;
  --shadow: 0 24px 70px rgba(22, 27, 34, .08);
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 20% 0%, rgba(185,140,66,.12), transparent 26rem), var(--bg);
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; height: auto; }
button, input, textarea { font: inherit; }
.skip-link { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: .75rem 1rem; border-radius: 999px; z-index: 99; }
.skip-link:focus { left: 16px; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(247,245,240,.82); backdrop-filter: blur(18px); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 78px; gap: 24px; }
.logo { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: .04em; }
.logo-mark { width: 42px; height: 42px; border-radius: 16px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--brand-dark), var(--brand)); box-shadow: 0 14px 28px rgba(43,55,70,.18); }
.logo small { display: block; font-weight: 500; color: var(--muted); letter-spacing: 0; font-size: 12px; margin-top: -4px; }
.nav { display: flex; align-items: center; gap: 26px; color: #333b46; font-size: 15px; }
.nav a { position: relative; padding: 8px 0; }
.nav a::after { content: ""; position: absolute; left: 0; bottom: 2px; height: 1px; width: 0; background: var(--ink); transition: width .24s ease; }
.nav a:hover::after, .nav a.active::after { width: 100%; }
.nav-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 50%; background: var(--surface); }
.site-search-wrap { border-top: 1px solid rgba(22,27,34,.06); }
.site-search { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; padding: 14px 0 18px; display: grid; grid-template-columns: 1fr auto; gap: 12px; }
.site-search input { border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.8); padding: 13px 18px; outline: none; }
.site-search button, .btn { border: 0; border-radius: 999px; background: var(--ink); color: #fff; padding: 13px 20px; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.site-search button:hover, .btn:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(22,27,34,.15); }
.search-hint { grid-column: 1 / -1; color: var(--muted); font-size: 14px; min-height: 1.3em; }
.hero { min-height: 78vh; display: grid; align-items: center; padding: 74px 0 56px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(360px, .98fr); gap: 58px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; color: var(--brand-dark); background: rgba(255,255,255,.74); border: 1px solid var(--line); border-radius: 999px; padding: 7px 13px; font-size: 13px; }
.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 6px rgba(185,140,66,.12); }
h1, h2, h3, h4 { line-height: 1.14; margin: 0; color: var(--ink); }
h1 { font-size: clamp(42px, 7vw, 82px); letter-spacing: -.06em; margin-top: 24px; }
h2 { font-size: clamp(30px, 4.2vw, 56px); letter-spacing: -.045em; }
h3 { font-size: 22px; letter-spacing: -.025em; }
.lead { font-size: clamp(18px, 2vw, 22px); color: var(--muted); max-width: 680px; margin: 24px 0 0; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 32px; }
.btn.secondary { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.metric-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 34px; }
.metric { border: 1px solid var(--line); border-radius: 20px; padding: 16px; background: rgba(255,255,255,.58); }
.metric strong { display: block; font-size: 28px; line-height: 1; }
.metric span { color: var(--muted); font-size: 13px; }
.hero-media, .image-card { position: relative; overflow: hidden; border-radius: calc(var(--radius) + 8px); box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,.72); background: #fff; }
.hero-media img { aspect-ratio: 16 / 10; object-fit: cover; }
.hero-badge { position: absolute; left: 24px; bottom: 24px; right: 24px; background: rgba(255,255,255,.74); backdrop-filter: blur(16px); border: 1px solid rgba(255,255,255,.75); border-radius: 22px; padding: 18px; color: var(--brand-dark); }
section { padding: 94px 0; }
.section-head { display: grid; grid-template-columns: minmax(0, .9fr) minmax(280px, .6fr); gap: 32px; align-items: end; margin-bottom: 34px; }
.section-head p { color: var(--muted); margin: 0; }
.grid { display: grid; gap: 18px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.card { background: rgba(255,255,255,.72); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(185,140,66,.24); }
.card .num { color: var(--brand); font-weight: 800; letter-spacing: .06em; font-size: 13px; }
.card p { color: var(--muted); margin-bottom: 0; }
.split { display: grid; grid-template-columns: minmax(0, .9fr) minmax(360px, .8fr); gap: 48px; align-items: center; }
.feature-list { display: grid; gap: 14px; margin-top: 28px; }
.feature-item { padding: 18px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 42px 1fr; gap: 16px; }
.icon-dot { width: 42px; height: 42px; border-radius: 15px; background: rgba(185,140,66,.13); color: var(--brand-dark); display: grid; place-items: center; font-weight: 800; }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.video-card { position: relative; overflow: hidden; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); box-shadow: 0 12px 40px rgba(22,27,34,.055); }
.video-card figure { margin: 0; position: relative; }
.video-card img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; transition: transform .45s ease; }
.video-card:hover img { transform: scale(1.045); }
.play-button { position: absolute; inset: 0; margin: auto; width: 68px; height: 68px; border-radius: 50%; border: 0; background: rgba(22,27,34,.78); color: #fff; display: grid; place-items: center; opacity: 0; transform: scale(.92); transition: opacity .24s ease, transform .24s ease; cursor: pointer; }
.play-button::before { content: ""; width: 0; height: 0; border-top: 12px solid transparent; border-bottom: 12px solid transparent; border-left: 18px solid #fff; margin-left: 4px; }
.video-card:hover .play-button, .video-card:focus-within .play-button { opacity: 1; transform: scale(1); }
.video-body { padding: 22px; }
.video-body h3 { margin-bottom: 10px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 15px 0 0; padding: 0; list-style: none; }
.tags li { font-size: 12px; padding: 5px 9px; border-radius: 999px; color: var(--brand-dark); background: rgba(43,55,70,.07); }
.stats { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; color: var(--muted); font-size: 13px; }
.gallery { display: grid; grid-template-columns: 1.1fr .9fr .9fr; gap: 18px; }
.gallery .video-card:first-child { grid-row: span 2; }
.gallery .video-card:first-child img { aspect-ratio: 1 / 1.18; }
.stat-block { text-align: center; padding: 34px 20px; }
.stat-block strong { font-size: clamp(32px, 4vw, 54px); display: block; letter-spacing: -.04em; }
.stat-block span { color: var(--muted); }
.review { min-height: 220px; display: flex; flex-direction: column; justify-content: space-between; }
.review p { color: var(--ink); }
.review footer { color: var(--muted); font-size: 14px; }
.faq-list { display: grid; gap: 12px; }
details { background: rgba(255,255,255,.72); border: 1px solid var(--line); border-radius: 22px; padding: 20px 22px; }
summary { cursor: pointer; font-weight: 700; list-style: none; }
summary::-webkit-details-marker { display: none; }
details p { color: var(--muted); margin-bottom: 0; }
.contact-panel { display: grid; grid-template-columns: .75fr 1fr; gap: 22px; align-items: stretch; }
.contact-info, .contact-form { background: rgba(255,255,255,.78); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; }
.contact-form { display: grid; gap: 14px; }
.contact-form input, .contact-form textarea { width: 100%; border: 1px solid var(--line); border-radius: 16px; padding: 14px 16px; background: #fff; outline: none; }
.contact-form textarea { min-height: 132px; resize: vertical; }
.breadcrumb { margin: 32px 0 0; color: var(--muted); font-size: 14px; }
.page-hero { padding: 72px 0 34px; }
.article-prose { max-width: 820px; color: var(--muted); font-size: 18px; }
.article-prose h2 { margin: 48px 0 18px; color: var(--ink); }
.article-prose p { margin: 0 0 18px; }
.callout { border-left: 4px solid var(--brand); background: rgba(255,255,255,.66); padding: 20px 22px; border-radius: 0 22px 22px 0; color: var(--brand-dark); }
.site-footer { padding: 54px 0 40px; border-top: 1px solid var(--line); background: rgba(255,255,255,.46); }
.footer-grid { display: grid; grid-template-columns: 1fr .6fr .6fr; gap: 28px; align-items: start; }
.footer-grid p, .footer-grid a, .footer-bottom { color: var(--muted); }
.footer-links { display: grid; gap: 10px; }
.footer-bottom { margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 14px; }
.modal { position: fixed; inset: 0; display: none; place-items: center; background: rgba(22,27,34,.58); z-index: 100; padding: 20px; }
.modal.active { display: grid; }
.modal-card { width: min(720px, 100%); background: #fff; border-radius: 28px; padding: 28px; box-shadow: 0 34px 90px rgba(0,0,0,.25); }
.modal-card h3 { margin-bottom: 10px; }
.modal-card p { color: var(--muted); }
.close-modal { float: right; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 50%; background: transparent; cursor: pointer; }
[data-animate] { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
[data-animate].visible { opacity: 1; transform: none; }
@media (max-width: 980px) {
  .nav-toggle { display: inline-grid; place-items: center; }
  .nav { position: absolute; left: 20px; right: 20px; top: 78px; display: none; flex-direction: column; align-items: flex-start; gap: 8px; background: rgba(255,255,255,.96); border: 1px solid var(--line); border-radius: 24px; padding: 18px; box-shadow: var(--shadow); }
  .nav.open { display: flex; }
  .hero-grid, .split, .section-head, .contact-panel { grid-template-columns: 1fr; }
  .video-grid, .grid.cols-3, .grid.cols-4, .gallery, .footer-grid { grid-template-columns: 1fr 1fr; }
  .gallery .video-card:first-child { grid-row: auto; }
  .metric-row { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 640px) {
  .container, .site-search { width: min(calc(100% - 28px), var(--max)); }
  .hero { min-height: auto; padding-top: 52px; }
  section { padding: 68px 0; }
  .video-grid, .grid.cols-3, .grid.cols-4, .gallery, .footer-grid, .metric-row { grid-template-columns: 1fr; }
  .site-search { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { text-align: center; }
}