:root {
  color-scheme: light;
  --text: #182235;
  --muted: #5d6c83;
  --line: #dbe4f0;
  --soft: #f5f8fc;
  --blue: #1e6af0;
  --blue-dark: #1747a8;
  --teal: #19b8a7;
  --amber: #f3aa2d;
  --white: #ffffff;
  --shadow: 0 18px 48px rgba(32, 64, 112, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family:
    "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
  background: var(--white);
  line-height: 1.65;
}

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

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 14px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(219, 228, 240, 0.88);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  box-shadow: 0 8px 18px rgba(30, 106, 240, 0.18);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 18px;
  line-height: 1.2;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 28px);
  color: #31435e;
  font-size: 14px;
  white-space: nowrap;
}

.nav a {
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(420px, 1.18fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: clamp(56px, 8vw, 104px) clamp(20px, 5vw, 72px) 72px;
  background:
    linear-gradient(135deg, rgba(30, 106, 240, 0.08), transparent 34%),
    linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

.hero-copy {
  max-width: 670px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(38px, 5vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 19px;
  line-height: 1.35;
  letter-spacing: 0;
}

.lead {
  max-width: 620px;
  margin-bottom: 28px;
  color: #40506a;
  font-size: clamp(17px, 1.7vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
}

.button.primary {
  color: #fff;
  border-color: var(--blue);
  background: var(--blue);
  box-shadow: 0 10px 20px rgba(30, 106, 240, 0.22);
}

.button.secondary {
  color: var(--blue-dark);
  background: #fff;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
}

.summary-grid div {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
}

.summary-grid dt {
  color: var(--muted);
  font-size: 13px;
}

.summary-grid dd {
  margin: 4px 0 0;
  font-weight: 700;
}

.hero-visual {
  overflow: hidden;
  border: 1px solid rgba(219, 228, 240, 0.9);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  height: auto;
}

.section {
  padding: clamp(58px, 8vw, 96px) clamp(20px, 5vw, 72px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 30px;
}

.section-heading p {
  color: var(--muted);
  font-size: 17px;
}

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

.feature-card {
  min-height: 230px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 10px 28px rgba(28, 61, 105, 0.06);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 26px;
  border-radius: 8px;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--blue), var(--teal));
}

.feature-card p,
.policy-grid p,
.contact p,
.document p {
  color: var(--muted);
}

.site-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px clamp(20px, 5vw, 72px);
  color: #66758c;
  border-top: 1px solid var(--line);
  background: #fff;
  font-size: 14px;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: #465a76;
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    flex-wrap: wrap;
  }

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

  .hero {
    min-height: auto;
  }

  .hero-visual {
    order: -1;
  }

  .feature-grid,
  .policy-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-header {
    position: static;
  }

  .brand {
    min-width: 0;
  }

  .nav {
    gap: 10px 16px;
    white-space: normal;
  }

  .hero,
  .section,
  .section {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .feature-card,
  .purpose-panel,
  .policy-grid > div,
  address,
}