:root {
  color-scheme: light;
  --bg: #f8f9fb;
  --text: #1d1f24;
  --muted: #5a6472;
  --primary: #2f6bff;
  --primary-dark: #1d4fd7;
  --card: #ffffff;
  --border: #e4e8ef;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

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

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

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  gap: 24px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: #ffffff;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 22px;
  font-weight: 700;
}

.brand h1 {
  font-size: 20px;
  font-weight: 700;
}

.tagline {
  color: var(--muted);
  font-size: 14px;
}

.nav {
  display: flex;
  gap: 20px;
  font-size: 15px;
}

.nav a {
  color: var(--muted);
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a:focus {
  color: var(--primary);
  border-color: var(--primary);
}

.hero {
  padding: 64px 0 48px;
  background: linear-gradient(135deg, #f6f8ff 0%, #eef2ff 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  align-items: center;
}

.hero-content h2 {
  font-size: 36px;
  margin-bottom: 12px;
}

.hero-content p {
  color: var(--muted);
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 600;
  transition: 0.2s ease;
  border: 1px solid transparent;
}

.btn.primary {
  background: var(--primary);
  color: #ffffff;
}

.btn.primary:hover {
  background: var(--primary-dark);
}

.btn.ghost {
  border-color: var(--primary);
  color: var(--primary);
  background: transparent;
}

.btn.ghost:hover {
  background: rgba(47, 107, 255, 0.1);
}

.hero-card {
  background: var(--card);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 20px 40px rgba(33, 47, 86, 0.08);
  display: grid;
  gap: 16px;
}

.stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--primary);
}

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

.section {
  padding: 64px 0;
}

.section.alt {
  background: #ffffff;
}

.section h3 {
  font-size: 28px;
  margin-bottom: 16px;
}

.section p {
  color: var(--muted);
  margin-bottom: 24px;
}

.grid {
  display: grid;
  gap: 20px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid.three {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(33, 47, 86, 0.06);
}

.card h4 {
  font-size: 18px;
  margin-bottom: 10px;
}

.contact {
  background: linear-gradient(120deg, #f7f9ff 0%, #edf3ff 100%);
}

.contact-card {
  background: var(--card);
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 12px 30px rgba(33, 47, 86, 0.1);
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
}

.label {
  font-weight: 600;
  color: var(--text);
  margin-right: 8px;
}

.site-footer {
  background: #0f172a;
  color: #cbd5f5;
  padding: 24px 0;
  text-align: center;
}

.site-footer .icp {
  margin-top: 6px;
  color: #94a3d0;
  font-size: 14px;
}

@media (max-width: 720px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    flex-wrap: wrap;
  }

  .hero-content h2 {
    font-size: 30px;
  }
}