:root {
  --bg: #f4f8ff;
  --surface: rgba(255, 255, 255, 0.96);
  --surface-soft: rgba(246, 250, 255, 0.92);
  --ink-strong: #102445;
  --ink: #2c4a70;
  --ink-soft: rgba(44, 74, 112, 0.78);
  --line: rgba(15, 99, 206, 0.12);
  --accent: #0f63ce;
  --accent-deep: #0b2a59;
  --radius-xl: 28px;
  --radius-lg: 22px;
  --shadow: 0 22px 46px rgba(10, 43, 91, 0.08);
  --font-display: "Iowan Old Style", "Palatino Linotype", "Noto Serif SC", serif;
  --font-body: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(31, 178, 255, 0.12), transparent 20%),
    linear-gradient(180deg, #f8fbff 0%, #f3f8ff 36%, #fbfdff 100%);
}

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

a:hover {
  text-decoration: underline;
}

.page-shell {
  min-height: 100vh;
  padding: 48px 0 0;
}

.container {
  width: min(980px, calc(100vw - 32px));
  margin: 0 auto;
}

.hero {
  padding: 32px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at top right, rgba(31, 178, 255, 0.16), transparent 28%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(241, 248, 255, 0.94));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
  color: var(--ink-strong);
}

.hero p {
  margin: 0;
  line-height: 1.82;
  color: var(--ink-soft);
}

.hero-meta {
  margin-top: 18px !important;
  color: rgba(44, 74, 112, 0.66) !important;
  font-size: 0.94rem;
}

.notice-card,
.toc,
.content-card {
  margin-top: 24px;
  padding: 28px;
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.notice-card h2,
.toc h2,
.content-card h2,
.content-card h3 {
  margin: 0;
  color: var(--ink-strong);
}

.notice-card h2,
.toc h2 {
  font-size: 1.14rem;
}

.notice-card ul,
.toc ul {
  margin: 18px 0 0;
  padding-left: 20px;
}

.notice-card li,
.toc li,
.content-card li,
.content-card p {
  line-height: 1.9;
  color: var(--ink-soft);
}

.content-card h2 {
  margin-bottom: 18px;
  font-size: 1.4rem;
}

.content-card h3 {
  margin-top: 26px;
  margin-bottom: 12px;
  font-size: 1.06rem;
}

.content-card p {
  margin: 0 0 12px;
}

.content-card ul {
  margin: 0 0 14px;
  padding-left: 20px;
}

.table-wrap {
  overflow-x: auto;
  margin: 10px 0 18px;
}

table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

th,
td {
  padding: 14px 16px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  line-height: 1.76;
  font-size: 0.95rem;
}

th {
  background: rgba(15, 99, 206, 0.06);
  color: var(--ink-strong);
  font-weight: 700;
}

td {
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.72);
}

.site-footer {
  margin-top: 28px;
  color: rgba(44, 74, 112, 0.64);
  font-size: 0.92rem;
}

@media (max-width: 720px) {
  .page-shell {
    padding-top: 24px;
  }

  .hero,
  .notice-card,
  .toc,
  .content-card {
    padding: 22px;
  }
}