:root {
  --bg: #eef2f8;
  --panel: #ffffff;
  --ink: #102040;
  --muted: #4f5f7a;
  --line: #dbe5f3;
  --accent: #2d5a9e;
  --soft: #edf5ff;
  --chip: #21385f;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Noto Serif SC", "PingFang SC", "Source Han Serif SC", "Times New Roman", serif;
  color: var(--ink);
  background: linear-gradient(140deg, #f4f8ff 0%, #f1fbff 52%, #f4f2ff 100%);
  line-height: 1.75;
}

.container {
  width: min(980px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(238, 242, 248, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand img {
  width: 120px;
  height: auto;
}

.brand h1 {
  margin: 0;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

nav a {
  color: #223b5f;
  text-decoration: none;
  margin-left: 1rem;
}

nav a:hover { text-decoration: underline; }

.hero {
  margin-top: 2rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 2rem;
  box-shadow: 0 8px 24px rgba(20, 33, 74, 0.08);
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 4vw, 2.9rem);
}

.hero p { margin: 0 0 1rem; color: var(--muted); }

.grid { display: grid; gap: 1rem; }
@media (min-width: 860px) { .grid { grid-template-columns: 1.25fr 0.75fr; } }

.card {
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.card h2 { margin-top: 0; font-size: 1.2rem; }

.tag {
  display: inline-flex;
  margin-right: 0.6rem;
  margin-bottom: 0.5rem;
  background: var(--soft);
  color: var(--chip);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  font-size: 0.85rem;
}

.ad-slot {
  margin-top: 1.2rem;
  border-radius: 12px;
  border: 1px dashed #9eb8e6;
  color: #2a3e62;
  padding: 0.7rem 1rem;
  background: linear-gradient(110deg, #f8fcff 0%, #eef8ff 100%);
}

main { padding: 1.5rem 0 2rem; }

.section-title {
  margin: 1.8rem 0 0.7rem;
  font-size: 1.3rem;
}

.page-list {
  display: grid;
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}

.page-list a {
  color: var(--accent);
}

.breadcrumb { color: #5b6f8f; margin: 1rem 0; }

footer {
  border-top: 1px solid var(--line);
  padding: 1.3rem 0;
  color: #4a5978;
}

.mono {
  font-family: "SFMono-Regular", ui-monospace, Menlo, Monaco, Consolas, monospace;
}

.table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  background: #fff;
}

.table th, .table td {
  border-bottom: 1px solid var(--line);
  text-align: left;
  padding: 0.6rem;
  vertical-align: top;
}

.notice {
  border-left: 4px solid #8ba9dd;
  background: #f5f9ff;
  padding: 0.8rem 1rem;
  border-radius: 8px;
}

@media (max-width: 760px) {
  .site-header .inner {
    flex-direction: column;
    align-items: flex-start;
  }

  nav a { margin-left: 0; margin-right: 1rem; margin-top: 0.4rem; display: inline-block; }

  .hero { padding: 1.2rem; }
}

.space-top { margin-top: 1rem; }