:root {
  color-scheme: light;
  --ink: #1f2933;
  --muted: #64717f;
  --line: #dde4ea;
  --paper: #ffffff;
  --soft: #f4f7f9;
  --accent: #0f766e;
  --accent-dark: #0b5f59;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
.topbar {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 7vw;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.94);
  position: sticky;
  top: 0;
}
.brand { font-weight: 800; font-size: 20px; }
nav { display: flex; gap: 24px; color: var(--muted); font-size: 14px; }
.hero {
  min-height: 520px;
  display: flex;
  align-items: center;
  padding: 72px 7vw;
  background:
    linear-gradient(90deg, rgba(15,118,110,.88), rgba(15,118,110,.45)),
    url('https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=1800&q=80') center/cover;
  color: #fff;
}
.hero-copy { max-width: 720px; }
.eyebrow { margin: 0 0 12px; letter-spacing: .08em; font-size: 13px; text-transform: uppercase; opacity: .9; }
h1 { margin: 0; font-size: 48px; line-height: 1.12; letter-spacing: 0; }
.lead { max-width: 620px; margin: 22px 0 28px; font-size: 18px; color: rgba(255,255,255,.88); }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  background: #fff;
  color: var(--accent-dark);
  font-weight: 700;
  border-radius: 6px;
}
.section { padding: 72px 7vw; }
.section-head { display: flex; justify-content: space-between; gap: 24px; align-items: end; margin-bottom: 28px; }
h2 { margin: 0; font-size: 30px; letter-spacing: 0; }
.section-head p, .band p { margin: 0; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
article {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  background: var(--paper);
}
article h3 { margin: 0 0 10px; font-size: 20px; }
article p { margin: 0; color: var(--muted); }
.band {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding: 56px 7vw;
  background: var(--soft);
  border-block: 1px solid var(--line);
}
.band ul { margin: 0; padding-left: 20px; color: var(--muted); }
footer {
  padding: 28px 7vw;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 14px;
}
@media (max-width: 760px) {
  .topbar { padding: 0 20px; }
  nav { gap: 12px; font-size: 13px; }
  .hero { min-height: 480px; padding: 56px 20px; }
  h1 { font-size: 34px; }
  .lead { font-size: 16px; }
  .section, .band, footer { padding-left: 20px; padding-right: 20px; }
  .section-head, .band, footer { display: block; }
  .grid { grid-template-columns: 1fr; }
  footer span { display: block; margin-top: 8px; }
}