:root {
  --bg: #080807;
  --panel: #11100d;
  --panel-soft: #18150f;
  --gold: #c9a44b;
  --gold-soft: #ead28a;
  --text: #f6f0e3;
  --muted: #b9ad94;
  --line: rgba(201, 164, 75, 0.28);
  --white-line: rgba(255, 255, 255, 0.1);
  --max: 1140px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 15% 0%, rgba(234,210,138,.12), transparent 28%), linear-gradient(140deg, rgba(201,164,75,.08), transparent 34%), var(--bg);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; transition: color .2s, border-color .2s, background .2s; }
img { max-width: 100%; display: block; }
p { color: var(--muted); margin-bottom: 1rem; }
ul, ol { color: var(--muted); padding-left: 1.25rem; margin-bottom: 1rem; }
li { margin-bottom: .35rem; }
.container { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
h1, h2, h3, h4 { color: var(--text); line-height: 1.25; font-weight: 650; letter-spacing: 0; }
h1 { font-size: clamp(2.1rem, 5vw, 4.4rem); margin-bottom: 1rem; }
h2 { font-size: clamp(1.75rem, 3vw, 2.7rem); margin-bottom: 1rem; }
h3 { font-size: 1.2rem; margin-bottom: .65rem; }
h4 { font-size: 1rem; margin-bottom: .45rem; }

.site-header { position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--line); background: rgba(8,8,7,.94); backdrop-filter: blur(16px); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo a { display: flex; align-items: center; gap: .75rem; color: var(--text); font-weight: 700; font-size: .98rem; }
.logo img { width: 46px; height: 46px; object-fit: contain; flex: 0 0 auto; }
.logo-text { display: block; }
.logo .logo-sub { display: block; color: var(--muted); font-size: .72rem; font-weight: 400; margin-top: 2px; }
.main-nav ul { display: flex; list-style: none; gap: 1.25rem; padding-left: 0; margin-bottom: 0; }
.main-nav a { color: var(--muted); font-size: .9rem; padding: .45rem 0; border-bottom: 1px solid transparent; }
.main-nav a:hover, .main-nav a.active { color: var(--gold-soft); border-bottom-color: var(--gold); }
.nav-toggle { display: none; background: transparent; border: 1px solid var(--line); color: var(--gold-soft); padding: .35rem .65rem; font-size: 1.2rem; }

.hero { min-height: calc(100vh - 76px); display: grid; align-items: center; padding: 3.5rem 0 4.5rem; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 3rem; align-items: center; }
.eyebrow { color: var(--gold-soft); text-transform: uppercase; letter-spacing: .08em; font-size: .82rem; margin-bottom: 1rem; }
.tagline { font-size: 1.05rem; color: var(--gold-soft); margin-bottom: 1.2rem; }
.hero-media { border: 1px solid var(--line); background: var(--panel); box-shadow: 0 28px 80px rgba(0,0,0,.42); }
.hero-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.media-caption { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.media-caption span { padding: .85rem; color: var(--muted); font-size: .82rem; border-right: 1px solid var(--line); }
.media-caption span:last-child { border-right: 0; }

.section { padding: 4.5rem 0; }
.section-alt { background: rgba(17,16,13,.68); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-title { text-align: center; margin-bottom: 2rem; }
.section-title::after { content: ""; display: block; width: 60px; height: 2px; background: var(--gold); margin: 14px auto 0; }
.page-intro { text-align: center; max-width: 760px; margin: 0 auto 2.5rem; }
.grid-3, .product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.grid-2, .contact-grid, .service-block { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.card, .service-item, .fact-card, .product-card, .contact-panel { background: rgba(17,16,13,.82); border: 1px solid var(--line); border-radius: 4px; }
.card, .service-item, .fact-card, .contact-panel { padding: 1.4rem; }
.card p, .service-item p, .product-card p, .contact-panel p { font-size: .92rem; }
.fact-card .number { color: var(--gold-soft); font-size: 1.35rem; font-weight: 700; }
.fact-card .label { color: var(--muted); font-size: .86rem; margin-top: .2rem; }
.product-card { overflow: hidden; }
.product-card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: #111; }
.product-card .info { padding: 1rem; }
.notice { border-left: 3px solid var(--gold); background: rgba(201,164,75,.08); padding: 1rem 1.2rem; margin-top: 1.5rem; }
.btn-group { display: flex; gap: .85rem; flex-wrap: wrap; margin-top: 1.6rem; }
.btn { display: inline-flex; justify-content: center; align-items: center; min-height: 44px; padding: 0 1.25rem; border: 1px solid var(--gold); color: #100f0d; background: linear-gradient(180deg, #e0bd67, #a9812f); font-weight: 700; border-radius: 2px; }
.btn-outline { background: transparent; color: var(--gold-soft); }
.btn:hover { filter: brightness(1.08); }
.contact-info-item { padding-top: 1rem; border-top: 1px solid var(--white-line); margin-bottom: 1rem; }
.contact-info-item h4 { color: var(--gold-soft); }
.form-note { color: var(--muted); font-size: .9rem; }

.site-footer { background: #050504; border-top: 1px solid var(--line); padding: 2.5rem 0 1.25rem; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1.2fr 1fr; gap: 1.5rem; margin-bottom: 1.6rem; }
.footer-grid ul { list-style: none; padding-left: 0; }
.footer-grid p, .footer-grid a { color: var(--muted); font-size: .86rem; }
.footer-grid a:hover { color: var(--gold-soft); }
.footer-bottom { border-top: 1px solid var(--white-line); padding-top: 1rem; text-align: center; color: rgba(255,255,255,.45); font-size: .78rem; }

@media (max-width: 900px) {
  .header-inner { flex-direction: column; align-items: flex-start; padding: .8rem 0; }
  .nav-toggle { display: block; position: absolute; right: 16px; top: 18px; }
  .main-nav { display: none; width: 100%; }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: .45rem; }
  .hero-grid, .grid-2, .contact-grid, .service-block, .footer-grid { grid-template-columns: 1fr; }
  .grid-3, .product-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-3, .product-grid { grid-template-columns: 1fr; }
  .media-caption { grid-template-columns: 1fr; }
  .section { padding: 3rem 0; }
}