:root {
  color-scheme: light;
  --canvas: #f5f3ef;
  --surface: #fffefb;
  --ink: #24312b;
  --muted: #637069;
  --accent: #4e6257;
  --accent-dark: #304238;
  --gold: #b39354;
  --line: #d8ddd9;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

a { color: inherit; text-decoration-color: #9aa79f; text-underline-offset: 0.22em; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 3px solid #91a79b; outline-offset: 4px; border-radius: 4px; }

.site-header,
main,
footer {
  width: min(100% - 40px, 1040px);
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 98px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 650;
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: 64px;
  height: 64px;
  object-fit: contain;
}

.web-entry {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
}

.primary-button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 8px 22px;
  border-radius: 999px;
  background: var(--accent-dark);
  box-shadow: 0 7px 18px rgb(48 66 56 / 14%);
  color: #fffdf7;
  font-size: 15px;
  font-weight: 650;
  text-decoration: none;
}

.primary-button:hover { background: var(--accent); color: white; }
.primary-button:focus-visible { outline-color: var(--gold); }

.no-break { white-space: nowrap; }

.hero {
  max-width: 850px;
  padding: clamp(64px, 9vw, 100px) 0 clamp(64px, 8vw, 92px);
}

.eyebrow,
.label,
.legal-meta {
  color: var(--muted);
  font-size: 14px;
}

.eyebrow {
  margin: 0 0 22px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(38px, 5.2vw, 58px);
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.2;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.introduction {
  max-width: 750px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 20px);
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--line);
}

.principles article { min-height: 310px; padding: 34px 30px; background: var(--surface); }
.principles h2 { margin: 22px 0 14px; font-size: 21px; }
.principles p { margin: 0; color: var(--muted); font-size: 15px; }
.principle-number { color: var(--gold); font-size: 13px; font-weight: 700; letter-spacing: 0.12em; }

.age-note {
  margin: 28px 0 72px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.about {
  padding: 52px 0 72px;
  border-top: 1px solid var(--line);
}

h2 { margin: 0 0 32px; font-size: 24px; font-weight: 650; }
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.about-lead, .partner-lead { max-width: 760px; margin: -12px 0 32px; color: var(--muted); font-size: 16px; }
.partner { padding: 52px 0 64px; border-top: 1px solid var(--line); }
.partner-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.partner-grid p { margin: 0; }
.partner-grid .label { margin-bottom: 8px; }
.hint { color: var(--muted); font-size: 13px; }
.apply-button-row { margin: 0 0 20px !important; }
.about-grid p { margin: 0; }
.about-grid .label { margin-bottom: 8px; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  flex-wrap: wrap;
}

footer nav { display: flex; flex-wrap: wrap; gap: 14px 24px; }
.icp-filing { flex-basis: 100%; text-align: center; }
/* 公安联网备案：图标在前、号码在右；窄屏允许换行，不横向溢出 */
.police-filing { display: inline-flex; align-items: center; gap: 6px; }
.police-filing img { width: 18px; height: 20px; flex: none; }
footer p.icp-filing:has(.police-filing) { white-space: normal; }
footer p { margin: 0; white-space: nowrap; }

.legal-page { width: min(100% - 40px, 760px); margin-inline: auto; }
.legal-page .site-header { width: 100%; }
.legal-document { padding: 64px 0 96px; }
.legal-document h1 { font-size: clamp(34px, 6vw, 50px); letter-spacing: -0.03em; }
.legal-meta { margin: 18px 0 48px; }
.legal-section { margin-top: 38px; }
.legal-section h2 { margin-bottom: 14px; font-size: 21px; }
.legal-section p { margin: 12px 0 0; }
.legal-back { text-decoration: none; }

@media (max-width: 720px) {
  .site-header, main, footer { width: min(100% - 32px, 1040px); }
  .site-header { min-height: 88px; gap: 12px; }
  .brand { gap: 7px; font-size: 16px; }
  .brand-logo { width: 52px; height: 52px; }
  .web-entry { gap: 3px; font-size: 10px; }
  .primary-button { min-height: 38px; padding: 7px 15px; font-size: 13px; }
  .hero { padding-top: 54px; padding-bottom: 64px; }
  .principles { grid-template-columns: 1fr; }
  .principles article { min-height: auto; padding: 30px 26px; }
  .age-note { margin-bottom: 56px; text-align: left; }
  .about-grid, .partner-grid { grid-template-columns: 1fr; gap: 28px; }
  footer { flex-direction: column; }
  .legal-page { width: min(100% - 32px, 760px); }
  .legal-document { padding-top: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
.apply-hint { margin: 0 0 24px !important; }