:root {
  color-scheme: light;
  --ink: #18211f;
  --muted: #5f6f6a;
  --line: #dbe4df;
  --green: #17664f;
  --green-light: #dff1e9;
  --paper: #f5f7f4;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); line-height: 1.7; }
a { color: inherit; }

.site-header {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; color: white; background: var(--green); }
nav { display: flex; gap: 30px; }
nav a { color: #44534f; font-size: 14px; text-decoration: none; }
nav a:hover, nav a:focus-visible { color: var(--green); }

main { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.hero { min-height: 600px; display: grid; grid-template-columns: 1.08fr .92fr; gap: 70px; align-items: center; padding: 70px 0 90px; }
.eyebrow, .section-label { margin: 0 0 14px; color: var(--green); font-size: 13px; font-weight: 800; letter-spacing: .12em; }
h1 { max-width: 650px; margin: 0; font-size: clamp(48px, 7vw, 84px); line-height: 1.08; letter-spacing: -.04em; }
.lead { max-width: 650px; margin: 28px 0; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.button { padding: 12px 19px; border: 1px solid var(--green); border-radius: 9px; font-size: 14px; font-weight: 700; text-decoration: none; }
.primary { color: white; background: var(--green); }
.secondary { color: var(--green); background: transparent; }

.hero-panel { position: relative; overflow: hidden; padding: 30px; border: 1px solid #bfd0c8; border-radius: 30px; background: #edf4f0; box-shadow: 0 35px 80px rgba(32, 67, 56, .14); }
.panel-glow { position: absolute; right: -20%; top: -20%; width: 70%; aspect-ratio: 1; border-radius: 50%; background: rgba(122, 196, 164, .35); filter: blur(30px); }
.metric { position: relative; display: grid; grid-template-columns: 54px 1fr; padding: 22px 0; border-bottom: 1px solid #cbdad3; }
.metric:last-child { border-bottom: 0; }
.metric span { grid-row: 1 / 3; color: #5c8073; font: 700 13px/1.4 ui-monospace, monospace; }
.metric strong { font-size: 20px; }
.metric small { color: var(--muted); font-size: 13px; }

.section { padding: 90px 0; border-top: 1px solid var(--line); }
.section h2 { max-width: 720px; margin: 0 0 38px; font-size: clamp(30px, 4vw, 48px); line-height: 1.22; letter-spacing: -.025em; }
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.cards article { min-height: 250px; padding: 25px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255, 255, 255, .62); }
.cards span { color: var(--green); font-size: 12px; font-weight: 800; }
.cards h3 { margin: 50px 0 12px; font-size: 21px; }
.cards p { margin: 0; color: var(--muted); font-size: 14px; }
.responsibility { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.responsibility-copy { padding-top: 34px; color: var(--muted); }
.responsibility-copy a { display: inline-block; margin-top: 14px; color: var(--green); font-weight: 800; text-decoration: none; }

footer { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 36px 0 48px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto; gap: 18px 40px; align-items: center; }
footer p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 18px; }
.footer-links a, .beian { color: var(--muted); font-size: 13px; text-decoration: none; }
.beian { grid-column: 1 / -1; justify-self: center; }
.footer-links a:hover, .beian:hover { color: var(--green); }

@media (max-width: 820px) {
  nav { gap: 15px; }
  .hero { grid-template-columns: 1fr; gap: 40px; padding: 50px 0 70px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .responsibility { grid-template-columns: 1fr; gap: 0; }
  .responsibility-copy { padding-top: 0; }
}

@media (max-width: 560px) {
  .site-header { width: min(100% - 28px, 1180px); }
  .site-header nav a:not(:last-child) { display: none; }
  main, footer { width: min(100% - 28px, 1180px); }
  .hero { min-height: auto; }
  h1 { font-size: 48px; }
  .lead { font-size: 16px; }
  .hero-panel { padding: 22px; border-radius: 22px; }
  .cards { grid-template-columns: 1fr; }
  .cards article { min-height: 210px; }
  footer { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
  .beian { grid-column: 1; justify-self: start; }
}