:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #1a2332;
  --muted: #5c6b7a;
  --primary: #0b5cab;
  --primary-dark: #084884;
  --border: #d8e2ef;
  --shadow: 0 12px 40px rgba(11, 92, 171, 0.08);
  --radius: 12px;
  --max: 1080px;
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

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

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
  flex-wrap: wrap;
}

.logo {
  font-weight: 700;
  color: var(--text);
  font-size: 0.95rem;
  max-width: 20rem;
  line-height: 1.35;
}

.logo:hover {
  text-decoration: none;
  color: var(--primary);
}

nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

nav a {
  color: var(--muted);
  font-weight: 500;
}

nav a.active,
nav a:hover {
  color: var(--primary);
  text-decoration: none;
}

.hero {
  background: linear-gradient(135deg, #0b5cab 0%, #1a8fd1 55%, #3eb5d9 100%);
  color: #fff;
  padding: 4.5rem 0 4rem;
}

.hero .eyebrow {
  margin: 0 0 0.5rem;
  opacity: 0.9;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.6rem, 4vw, 2.35rem);
  line-height: 1.25;
}

.hero .lead {
  margin: 0 0 1.75rem;
  max-width: 42rem;
  font-size: 1.05rem;
  opacity: 0.95;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  color: #fff;
  font-weight: 600;
}

.btn:hover {
  text-decoration: none;
  background: rgba(255, 255, 255, 0.12);
}

.btn.primary {
  background: #fff;
  color: var(--primary-dark);
  border-color: #fff;
}

.btn.primary:hover {
  background: #eef6ff;
}

.section {
  padding: 3.5rem 0;
}

.section.muted {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-title {
  margin-top: 0;
}

.grid-3 {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.card h2 {
  margin-top: 0;
  font-size: 1.15rem;
  color: var(--primary-dark);
}

.page {
  padding: 3rem 0 4rem;
}

.prose {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.prose h1 {
  margin-top: 0;
}

.prose h2 {
  margin-top: 2rem;
  color: var(--primary-dark);
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}

.info-table th,
.info-table td {
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.info-table th {
  width: 8rem;
  color: var(--muted);
  font-weight: 600;
}

.note {
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer {
  background: #102a43;
  color: #c9d6e5;
  padding: 2rem 0;
  text-align: center;
  font-size: 0.9rem;
}

.site-footer a {
  color: #9fd3ff;
}

.site-footer p {
  margin: 0.35rem 0;
}

@media (max-width: 640px) {
  .logo {
    max-width: 100%;
  }
}