:root {
  color-scheme: light;
  --primary: #f05a3b;
  --primary-soft: #fff2ee;
  --text: #172033;
  --muted: #687083;
  --border: #e9ebf0;
  --background: #f6f7f9;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: var(--background); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; line-height: 1.75; }
a { color: inherit; text-decoration: none; }
.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid rgba(233, 235, 240, .9); background: rgba(255, 255, 255, .94); backdrop-filter: blur(12px); }
.nav { display: flex; width: min(1080px, calc(100% - 40px)); min-height: 68px; align-items: center; margin: 0 auto; }
.brand { display: flex; align-items: center; font-size: 20px; font-weight: 750; }
.brand-mark { display: inline-flex; width: 38px; height: 38px; align-items: center; justify-content: center; margin-right: 10px; border-radius: 12px; color: #fff; background: var(--primary); }
.nav-links { display: flex; gap: 28px; margin-left: auto; color: var(--muted); font-size: 14px; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.hero { padding: 92px 20px 74px; text-align: center; background: linear-gradient(145deg, #fff 20%, #fff5f1); }
.hero-badge { display: inline-block; padding: 6px 14px; border-radius: 20px; color: var(--primary); background: var(--primary-soft); font-size: 13px; font-weight: 650; }
.hero h1 { margin: 18px 0 12px; font-size: clamp(36px, 7vw, 58px); line-height: 1.2; }
.hero p { max-width: 650px; margin: 0 auto; color: var(--muted); font-size: 18px; }
.features { display: grid; width: min(980px, calc(100% - 40px)); grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 38px auto 70px; }
.feature { padding: 28px; border: 1px solid var(--border); border-radius: 20px; background: #fff; }
.feature-icon { display: flex; width: 44px; height: 44px; align-items: center; justify-content: center; border-radius: 14px; color: var(--primary); background: var(--primary-soft); font-weight: 750; }
.feature h2 { margin: 16px 0 6px; font-size: 18px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }
.document { width: min(860px, calc(100% - 32px)); margin: 36px auto 64px; padding: 42px 48px; border: 1px solid var(--border); border-radius: 22px; background: #fff; }
.document h1 { margin: 0 0 4px; font-size: 34px; line-height: 1.35; }
.document .meta { margin: 0 0 30px; color: var(--muted); font-size: 14px; }
.document h2 { margin: 32px 0 10px; font-size: 21px; }
.document p, .document li { color: #4e5667; font-size: 15px; }
.document ul { padding-left: 22px; }
.notice { padding: 18px 20px; border-radius: 14px; color: #7b4639; background: var(--primary-soft); }
.email { color: var(--primary); font-weight: 650; }
.site-footer { padding: 28px 20px 36px; border-top: 1px solid var(--border); color: var(--muted); background: #fff; text-align: center; font-size: 13px; }
.footer-links { display: flex; justify-content: center; gap: 22px; margin-bottom: 8px; }

@media (max-width: 720px) {
  .nav { width: calc(100% - 28px); flex-wrap: wrap; padding: 12px 0 8px; }
  .nav-links { width: 100%; justify-content: space-between; gap: 8px; margin: 8px 0 0; font-size: 13px; white-space: nowrap; }
  .hero { padding: 66px 22px 54px; }
  .features { grid-template-columns: 1fr; }
  .document { margin-top: 20px; padding: 28px 22px; }
  .document h1 { font-size: 28px; }
}