:root {
  color-scheme: light;
  --paper: #f4f1e8;
  --paper-deep: #e8e1d1;
  --ink: #17211d;
  --muted: #5f6b64;
  --forest: #1f5542;
  --forest-dark: #153a2e;
  --amber: #d78a2d;
  --line: rgba(23, 33, 29, 0.16);
  --white: #fffdf7;
  --shadow: 0 22px 70px rgba(35, 45, 39, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 3%, rgba(215, 138, 45, 0.13), transparent 30rem),
    linear-gradient(180deg, #faf8f2 0, var(--paper) 42rem, #eee9dc 100%);
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.7;
}
a { color: inherit; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 100; padding: 8px 12px; background: var(--ink); color: #fff; }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  min-height: 76px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
  background: rgba(250, 248, 242, 0.9);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { display: grid; width: 38px; height: 38px; place-items: center; color: var(--white); background: var(--forest); border-radius: 50% 50% 45% 55%; font-family: Georgia, serif; font-size: 20px; }
.brand strong, .brand small { display: block; line-height: 1.2; }
.brand strong { font-family: Georgia, "Songti SC", serif; font-size: 19px; letter-spacing: 0.08em; }
.brand small { margin-top: 3px; color: var(--muted); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; }
.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav a { color: #3e4a44; font-size: 14px; text-decoration: none; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--forest); }
.nav-login { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 18px; color: #fff !important; background: var(--forest); border-radius: 999px; font-weight: 700; text-decoration: none; }
.nav-login:hover, .nav-login:focus-visible { background: var(--forest-dark); }

main { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.hero { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr); gap: clamp(42px, 8vw, 108px); align-items: center; min-height: 690px; padding: 92px 0 88px; }
.eyebrow { margin: 0 0 18px; color: var(--forest); font-size: 12px; font-weight: 800; letter-spacing: 0.18em; text-transform: uppercase; }
.hero h1 { max-width: 820px; margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(48px, 6.5vw, 82px); font-weight: 500; letter-spacing: -0.04em; line-height: 1.14; }
.hero h1 em { color: var(--forest); font-style: normal; }
.hero-intro { max-width: 700px; margin: 30px 0 0; color: var(--muted); font-size: 18px; line-height: 1.9; }
.hero-actions, .legal-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.primary-action, .secondary-action { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 24px; border-radius: 999px; font-weight: 800; text-decoration: none; }
.primary-action { color: #fff; background: var(--forest); }
.primary-action:hover, .primary-action:focus-visible { background: var(--forest-dark); }
.secondary-action { border: 1px solid var(--line); background: rgba(255, 253, 247, 0.58); }
.secondary-action:hover, .secondary-action:focus-visible { border-color: var(--forest); }
.access-note { margin: 16px 0 0; color: var(--muted); font-size: 13px; }

.echo-card { position: relative; padding: 34px; background: var(--forest-dark); color: #fff; border-radius: 90px 24px 90px 24px; box-shadow: var(--shadow); overflow: hidden; }
.echo-card::after { content: ""; position: absolute; right: -70px; bottom: -70px; width: 180px; height: 180px; border: 26px solid rgba(255,255,255,.06); border-radius: 50%; }
.card-kicker { margin: 0 0 24px; color: #b9d1c7; font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.echo-card ol { display: grid; gap: 24px; margin: 0; padding: 0; list-style: none; }
.echo-card li { display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: center; }
.echo-card li > span { color: var(--amber); font-family: Georgia, serif; font-size: 21px; }
.echo-card strong, .echo-card small { display: block; }
.echo-card small { margin-top: 2px; color: #b9d1c7; }

.section-block { padding: 100px 0; border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: minmax(250px, .8fr) minmax(300px, 1.2fr); column-gap: 60px; align-items: end; }
.section-heading .eyebrow { grid-column: 1 / -1; }
.section-heading h2, .boundary-block h2, .filing-block h2 { margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(34px, 4vw, 54px); font-weight: 500; line-height: 1.2; }
.section-heading > p:last-child { margin: 0; color: var(--muted); font-size: 17px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 52px; }
.feature-grid article { min-height: 260px; padding: 30px; background: rgba(255,253,247,.72); border: 1px solid var(--line); border-radius: 18px; }
.feature-grid article > span { display: grid; width: 42px; height: 42px; place-items: center; color: var(--forest); background: #dce7de; border-radius: 50%; font-family: Georgia, serif; font-size: 19px; }
.feature-grid h3 { margin: 46px 0 10px; font-size: 21px; }
.feature-grid p { margin: 0; color: var(--muted); }

.boundary-block, .filing-block { display: grid; grid-template-columns: minmax(260px, .75fr) minmax(320px, 1.25fr); gap: 64px; padding: 100px 0; border-top: 1px solid var(--line); }
.boundary-block ul { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.boundary-block li { position: relative; padding: 18px 20px 18px 52px; background: rgba(255,253,247,.7); border: 1px solid var(--line); border-radius: 14px; }
.boundary-block li::before { content: "—"; position: absolute; left: 20px; color: var(--amber); font-weight: 900; }
.filing-block dl { margin: 0; background: rgba(255,253,247,.72); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }
.filing-block dl div { display: grid; grid-template-columns: 130px 1fr; gap: 24px; padding: 17px 22px; border-bottom: 1px solid var(--line); }
.filing-block dl div:last-child { border-bottom: 0; }
.filing-block dt { color: var(--muted); }
.filing-block dd { margin: 0; font-weight: 700; }
.filing-block dd a, .filing-line a { color: var(--forest); }
.contact-note { grid-column: 2; margin: -40px 0 0; color: var(--muted); font-size: 13px; }

.site-footer { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 46px 0 30px; border-top: 1px solid var(--line); }
.site-footer > div { display: flex; gap: 12px; align-items: baseline; }
.site-footer > div span { color: var(--muted); font-size: 13px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 18px; }
.site-footer nav a { color: var(--muted); font-size: 14px; }
.filing-line { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0 0; color: var(--muted); font-size: 13px; }
.copyright { margin: 8px 0 0; color: #7d877f; font-size: 12px; }

.legal-shell { max-width: 820px; padding: 88px 0 100px; }
.legal-shell h1 { margin: 0 0 24px; font-family: Georgia, "Songti SC", serif; font-size: clamp(46px, 7vw, 72px); font-weight: 500; }
.legal-lead { margin: 0 0 54px; color: var(--muted); font-size: 18px; }
.legal-shell section { padding: 26px 0; border-top: 1px solid var(--line); }
.legal-shell section h2 { margin: 0 0 10px; font-size: 20px; }
.legal-shell section p { margin: 0; color: var(--muted); }
.compact-footer { padding-top: 24px; }

@media (max-width: 820px) {
  .site-header { width: min(100% - 28px, 1180px); }
  .site-nav > a:not(.nav-login) { display: none; }
  main, .site-footer { width: min(100% - 28px, 1180px); }
  .hero { grid-template-columns: 1fr; min-height: 0; padding: 66px 0 72px; }
  .hero h1 { font-size: clamp(42px, 13vw, 64px); }
  .echo-card { border-radius: 54px 18px 54px 18px; }
  .section-heading, .boundary-block, .filing-block { grid-template-columns: 1fr; gap: 28px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article { min-height: 220px; }
  .contact-note { grid-column: 1; margin: -8px 0 0; }
}

@media (max-width: 520px) {
  .site-header { min-height: 66px; }
  .brand small { display: none; }
  .brand-mark { width: 34px; height: 34px; }
  .brand strong { font-size: 16px; }
  .nav-login { min-height: 38px; padding: 0 13px; font-size: 13px; }
  .hero { padding-top: 48px; }
  .hero-intro { font-size: 16px; }
  .hero-actions a { width: 100%; }
  .section-block, .boundary-block, .filing-block { padding: 72px 0; }
  .filing-block dl div { grid-template-columns: 1fr; gap: 2px; }
}

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