:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-strong: #eef8f6;
  --text: #17202a;
  --muted: #5d6878;
  --line: #dde4ec;
  --brand: #0d827e;
  --brand-dark: #24354a;
  --accent: #ff7258;
  --shadow: 0 22px 60px rgba(24, 42, 63, 0.1);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(246, 248, 251, 0.92);
  border-bottom: 1px solid rgba(221, 228, 236, 0.8);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 16px 0;
  gap: 24px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 740;
  letter-spacing: 0;
}

.brand-link img {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 8px 22px rgba(36, 53, 74, 0.12);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 15px;
}

.hero {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 42px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.76fr);
  gap: 42px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--brand);
  font-size: 15px;
  font-weight: 760;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 20px;
  font-size: clamp(42px, 7vw, 72px);
  line-height: 1.06;
  letter-spacing: 0;
}

.lead {
  max-width: 780px;
  color: var(--muted);
  font-size: clamp(18px, 2.4vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 12px;
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--surface);
  font-weight: 720;
}

.button.primary {
  border-color: var(--brand);
  color: #fff;
  background: var(--brand);
}

.button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.identity-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.identity-card img {
  width: 82px;
  height: 82px;
  margin-bottom: 20px;
}

.identity-card dl {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  gap: 12px 18px;
  margin: 0;
}

.identity-card dt {
  color: var(--muted);
  font-size: 14px;
}

.identity-card dd {
  margin: 0;
  font-weight: 680;
}

.section {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 42px 0;
}

.section h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4.8vw, 46px);
  line-height: 1.16;
  letter-spacing: 0;
}

.section-intro {
  max-width: 760px;
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 18px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  min-height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.card h3 {
  margin-bottom: 10px;
  font-size: 21px;
}

.card p {
  margin-bottom: 0;
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 1.08fr);
  gap: 22px;
  align-items: stretch;
}

.panel {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.panel.tint {
  background: var(--surface-strong);
}

.list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--muted);
}

.dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 9px;
  border-radius: 99px;
  background: var(--brand);
}

.notice {
  border-left: 4px solid var(--accent);
  padding-left: 18px;
  color: var(--muted);
}

.doc {
  width: min(860px, calc(100% - 40px));
  margin: 0 auto;
  padding: 54px 0 64px;
}

.doc h1 {
  font-size: clamp(38px, 6vw, 58px);
}

.doc h2 {
  margin: 36px 0 12px;
  font-size: 26px;
}

.doc p,
.doc li {
  color: var(--muted);
}

.doc ul {
  padding-left: 22px;
}

.meta {
  color: var(--muted);
  font-size: 15px;
}

.site-footer {
  margin-top: 34px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 26px 0;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 860px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 14px;
  }

  .hero {
    padding-top: 48px;
  }

  .hero-grid,
  .split,
  .cards {
    grid-template-columns: 1fr;
  }

  .identity-card dl {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .footer-inner {
    flex-direction: column;
  }
}