:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #687386;
  --line: #dde3e9;
  --accent: #087a72;
  --accent-deep: #07645e;
  --surface: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: #f5f7f8;
  color: var(--ink);
  font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
}
button, textarea { font: inherit; }

.site-head {
  position: sticky;
  top: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 68px;
  padding: 0 clamp(18px, 6vw, 88px);
  border-bottom: 1px solid rgba(221, 227, 233, 0.9);
  background: rgba(255, 255, 255, 0.96);
}
.site-brand { display: flex; align-items: center; min-width: 0; margin-right: auto; }
.site-logo {
  display: block;
  width: min(320px, 38vw);
  height: 44px;
  object-fit: contain;
  object-position: left center;
}
.site-head nav { display: flex; gap: 24px; }
.site-head a { color: #384457; text-decoration: none; font-size: 13px; }
.site-head a:hover { color: var(--accent); }
.site-consult {
  min-height: 34px;
  padding: 0 16px;
  border: 1px solid var(--accent);
  border-radius: 17px;
  background: #fff;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}
.site-consult:hover { background: var(--accent); color: #fff; }
.site-phone { color: var(--accent) !important; font-weight: 700; }

.site-hero {
  display: flex;
  min-height: min(590px, 72vh);
  align-items: center;
  padding: 56px clamp(18px, 7vw, 112px);
  background:
    linear-gradient(90deg, rgba(6,28,36,0.92), rgba(6,28,36,0.62) 50%, rgba(6,28,36,0.22)),
    url("https://images.unsplash.com/photo-1450101499163-c8848c66ca85?auto=format&fit=crop&w=1800&q=82") center / cover;
  color: #fff;
}
.hero-inner { width: min(670px, 100%); }
.hero-inner p, .section-label { margin: 0 0 12px; color: #86ddd5; font-size: 13px; font-weight: 700; }
.hero-inner h1 { max-width: 650px; margin: 0; font-size: clamp(36px, 6vw, 64px); line-height: 1.15; }
.hero-inner span { display: block; margin: 20px 0 30px; color: rgba(255,255,255,0.86); line-height: 1.7; }
.hero-inner a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  padding: 0 18px;
  border: 1px solid rgba(255,255,255,0.54);
  border-radius: 4px;
  color: #fff;
  text-decoration: none;
}

.site-band { padding: 52px clamp(18px, 7vw, 112px); background: #fff; }
.site-section { max-width: 1180px; margin: 0 auto; }
.site-section h2, .site-about h2 { max-width: 720px; margin: 0; font-size: 28px; line-height: 1.35; }
.service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 30px; }
.service-grid article {
  display: grid;
  gap: 10px;
  min-height: 132px;
  align-content: center;
  padding: 18px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  background: #fff;
}
.service-grid strong { font-size: 17px; }
.service-grid span { color: var(--muted); font-size: 13px; line-height: 1.65; }
.site-about {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding: 44px clamp(18px, 7vw, 112px) 110px;
  background: #edf3f3;
}
.site-about p:last-child { max-width: 440px; color: var(--muted); line-height: 1.8; }

@media (max-width: 680px) {
  .site-head { gap: 12px; padding: 0 14px; }
  .site-logo { width: min(150px, 42vw); height: 30px; }
  .site-consult { padding: 0 12px; font-size: 12px; }
  .site-phone { font-size: 12px !important; }
  .site-hero { min-height: 500px; padding: 44px 20px; }
  .hero-inner h1 { font-size: 42px; }
  .service-grid { grid-template-columns: 1fr; }
  .site-about { display: block; padding-bottom: 100px; }
  .site-about p:last-child { margin-top: 14px; }
}

@media (max-width: 980px) {
  .site-head nav { display: none; }
}