:root {
  color-scheme: light;
  --bg: #fffaf3;
  --panel: rgba(255, 255, 255, 0.8);
  --panel-strong: #ffffff;
  --ink: #2a251f;
  --muted: #6a6156;
  --line: rgba(82, 63, 41, 0.12);
  --accent: #d96c3f;
  --accent-strong: #b84f26;
  --accent-soft: #ffe1d4;
  --hero-a: #ffe6cf;
  --hero-b: #ffd4df;
  --hero-c: #fff5c8;
  --shadow: 0 18px 50px rgba(91, 65, 40, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 999px;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, var(--hero-a), transparent 34%),
    radial-gradient(circle at top right, var(--hero-b), transparent 32%),
    linear-gradient(180deg, #fff8f0 0%, #fffdf8 36%, #fff9f2 100%);
  font-family: "Avenir Next", "PingFang SC", "PingFang TC", "Hiragino Sans", "Apple SD Gothic Neo", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-shell {
  min-height: 100vh;
}

.site-header,
.site-footer,
main {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 18px 22px;
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 250, 243, 0.86);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.site-nav a,
.language-switch button,
.button {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.72);
  padding: 10px 14px;
  font-size: 0.95rem;
  font-weight: 700;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.site-nav a:hover,
.language-switch button:hover,
.button:hover {
  transform: translateY(-1px);
  background: #fff;
}

.site-nav a.is-active,
.language-switch button.is-active,
.button.is-primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
}

.language-switch {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

main {
  padding: 34px 0 56px;
}

.hero,
.page-card,
.support-grid article,
.feature-card,
.notice-card,
.faq-item {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  padding: 34px;
  border-radius: 34px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.hero h1,
.page-card h1 {
  margin: 16px 0 10px;
  font-size: clamp(2.4rem, 4vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.hero p.lead,
.page-card .lead {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.hero-panel {
  display: grid;
  gap: 14px;
}

.feature-list,
.stats-list,
.document-list,
.legal-meta,
.contact-list,
.faq-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature-list li,
.stats-list li,
.document-list li,
.contact-list li,
.faq-item,
.legal-meta li {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.74);
}

.stats-list,
.feature-grid,
.support-grid,
.doc-grid {
  display: grid;
  gap: 16px;
}

.stats-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-grid,
.doc-grid,
.support-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card,
.notice-card,
.page-card,
.faq-item,
.support-grid article {
  border-radius: 26px;
}

.feature-card,
.support-grid article,
.notice-card {
  padding: 24px;
}

.page-card {
  padding: 34px;
}

.section-stack {
  display: grid;
  gap: 18px;
}

.section-stack + .section-stack {
  margin-top: 22px;
}

.section-stack h2,
.feature-card h2,
.support-grid h2,
.notice-card h2 {
  margin: 0 0 10px;
  font-size: 1.4rem;
}

.section-stack p,
.section-stack li,
.feature-card p,
.support-grid p,
.notice-card p,
.faq-item p {
  color: var(--muted);
  line-height: 1.75;
}

.section-stack ul {
  margin: 0;
  padding-left: 18px;
}

.site-footer {
  padding: 0 0 40px;
}

.site-footer .footer-card {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

.muted {
  color: var(--muted);
}

.link-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

@media (max-width: 960px) {
  .site-header {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .site-nav,
  .language-switch {
    justify-content: flex-start;
  }

  .hero,
  .feature-grid,
  .doc-grid,
  .support-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  body {
    background:
      radial-gradient(circle at top left, var(--hero-a), transparent 40%),
      linear-gradient(180deg, #fff8f0 0%, #fffdf8 40%, #fff9f2 100%);
  }

  .site-header,
  main,
  .site-footer {
    width: min(calc(100% - 20px), var(--max));
  }

  .site-header {
    padding: 16px;
    margin-top: 10px;
  }

  .hero,
  .page-card,
  .feature-card,
  .support-grid article,
  .notice-card {
    padding: 22px;
    border-radius: 22px;
  }

  .stats-list {
    grid-template-columns: 1fr;
  }

  .site-footer .footer-card {
    flex-direction: column;
    align-items: flex-start;
  }
}