:root {
  color-scheme: light;
  --ink: #17201d;
  --muted: #53615c;
  --brand: #184c40;
  --brand-dark: #123b32;
  --surface: #f7f1e6;
  --card: #fffbf4;
  --line: #ded7ca;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--surface); line-height: 1.6; }
[data-lang][hidden] { display: none !important; }
html[lang="en"] [data-lang="zh"],
html[lang^="zh"] [data-lang="en"] { display: none; }
a { color: var(--brand-dark); }
img { max-width: 100%; height: auto; }

.site-header,
footer {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
}

.site-header nav { display: flex; gap: 22px; flex-wrap: wrap; }
.site-header nav a { text-decoration: none; font-weight: 700; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); font-weight: 800; text-decoration: none; }
.brand img { border-radius: 13px; box-shadow: 0 10px 28px rgb(23 49 46 / 16%); }
.language-switch { display: inline-flex; padding: 4px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); }
.language-switch button { border: 0; border-radius: 999px; padding: 7px 11px; color: var(--muted); background: transparent; cursor: pointer; font: inherit; font-weight: 750; }
.language-switch button[aria-pressed="true"] { color: #fff; background: var(--brand); }

main { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.hero { min-height: 70vh; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: clamp(36px, 7vw, 96px); padding: 72px 0 96px; }
.hero h1, .policy h1 { max-width: 13ch; margin: 8px 0 20px; font-size: clamp(2.7rem, 7vw, 5.8rem); line-height: .98; letter-spacing: -.055em; }
.lede { max-width: 58ch; color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.3rem); }
.eyebrow { color: var(--brand); font-size: .78rem; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
.button { display: inline-block; margin-top: 18px; padding: 13px 20px; border-radius: 999px; color: #fff; background: var(--brand); font-weight: 800; text-decoration: none; }
.hero-art { margin: 0; padding: 24px; border: 1px solid var(--line); border-radius: 32px; background: var(--card); box-shadow: 0 30px 80px rgb(24 76 64 / 14%); text-align: center; }
.hero-art img { display: block; width: 100%; max-height: 460px; object-fit: contain; }
.hero-art figcaption { margin-top: 12px; color: var(--muted); font-size: .9rem; }

.section { padding: 72px 0 110px; }
.section h2 { max-width: 18ch; font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.05; letter-spacing: -.035em; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 36px; }
.feature-grid article { padding: 26px; border: 1px solid var(--line); border-radius: 22px; background: var(--card); }
.feature-grid h3 { margin-top: 0; }
.feature-grid p { color: var(--muted); }
.number { color: #b85d3b; font-size: .8rem; font-weight: 850; letter-spacing: .12em; }
.note-panel { margin-bottom: 36px; padding: clamp(28px, 6vw, 64px); border-radius: 30px; background: #184c40; color: #fffbf4; }
.note-panel .eyebrow { color: #d8b697; }
.note-panel h2 { max-width: 24ch; margin: 10px 0; font-size: clamp(2rem, 4vw, 3.3rem); line-height: 1.1; }
.note-panel p:last-child { max-width: 64ch; color: #e6eee9; }
.contact-note { margin-bottom: 110px; padding: 28px 32px; border: 1px solid var(--line); border-radius: 24px; background: var(--card); }
.contact-note h2 { margin: 0 0 8px; }
.contact-note p { margin: 0; color: var(--muted); }

.policy { max-width: 780px; padding: 72px 0 110px; }
.policy h1 { max-width: none; }
.policy h2 { margin-top: 42px; font-size: 1.35rem; }
.policy p { color: var(--muted); }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: .94rem; }

@media (max-width: 760px) {
  .site-header, footer { align-items: flex-start; flex-direction: column; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 44px; }
  .feature-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}