:root {
  --bg: #f6f8fc;
  --bg-card: #ffffff;
  --text: #18253c;
  --muted: #4f6180;
  --line: #d9e3f3;
  --primary: #0b2d5e;
  --primary-2: #153f7b;
  --gold-1: #f5cf63;
  --gold-2: #deac2f;
  --danger-bg: #fff3f3;
  --danger-line: #eebbbb;
  --danger-text: #8f1c1c;
  --radius: 12px;
  --shadow: 0 10px 28px rgba(15, 32, 64, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
}

a {
  color: var(--primary);
}

.container {
  width: min(1020px, 100% - 32px);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--primary);
  font-weight: 800;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 3px 12px rgba(11, 45, 94, 0.24);
}

.brand-mark img {
  width: 100%;
  height: 100%;
  display: block;
}

.brand-text span {
  color: #aa7d14;
}

.header-links {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

.header-links a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
}

.header-links a:hover {
  color: var(--primary);
}

.main {
  padding: 28px 0 56px;
}

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1200px 300px at -10% 0%, rgba(21, 63, 123, 0.09), transparent 60%),
    radial-gradient(900px 250px at 100% 0%, rgba(245, 207, 99, 0.15), transparent 55%),
    #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.2;
  background-image: url('../assets/ornament-oyu-tile.webp');
  background-size: 220px 220px;
  background-repeat: repeat;
  mask-image: linear-gradient(transparent, #000 18%, #000 84%, transparent);
}

.hero > * {
  position: relative;
  z-index: 1;
}

.page-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid #d6e2ff;
  background: #eef3ff;
  color: #1d4277;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2px;
}

h1 {
  margin: 0 0 10px;
  font-family: Merriweather, Georgia, serif;
  font-size: clamp(1.5rem, 1.2rem + 1.1vw, 2.2rem);
  color: #0b2d5e;
  line-height: 1.25;
}

.lead {
  margin: 0;
  color: var(--muted);
  max-width: 780px;
}

.meta-grid {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fcfdff;
  padding: 10px 12px;
  font-size: 0.92rem;
}

.meta-row strong {
  color: #0e2f60;
}

.content {
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.card h2 {
  margin: 0 0 10px;
  color: var(--primary);
  font-size: 1.2rem;
}

.card h3 {
  margin: 14px 0 8px;
  font-size: 1rem;
  color: #163c72;
}

.card p,
.card li {
  color: #2f4466;
  margin: 0 0 8px;
}

.card ul,
.card ol {
  margin: 0;
  padding-left: 18px;
}

.warning {
  border: 1px solid var(--danger-line);
  background: var(--danger-bg);
  color: var(--danger-text);
  border-radius: var(--radius);
  padding: 14px;
  font-weight: 700;
}

.doc-links {
  display: grid;
  gap: 8px;
}

.doc-link {
  display: block;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  padding: 10px 12px;
  text-decoration: none;
  color: var(--primary);
  font-weight: 600;
}

.doc-link:hover {
  border-color: #b3c7ea;
  background: #f7faff;
}

.site-footer {
  margin-top: 28px;
  border-top: 1px solid var(--line);
  padding: 22px 0 26px;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 4px 0;
}

@media (max-width: 700px) {
  .header-inner {
    min-height: auto;
    padding: 10px 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .meta-row {
    flex-direction: column;
    gap: 4px;
  }

  .hero {
    padding: 18px;
  }
}