:root {
  --ink: #102b39;
  --muted: #5d7684;
  --brand: #0d6e7a;
  --brand-deep: #0a4d5f;
  --bg: #f3f7f9;
  --card: #ffffff;
  --line: #dce8ed;
  --accent: #e8734a;
  --soft: #eaf3f6;
  --radius: 16px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 500px at 8% -10%, #dff1f4 0%, transparent 60%),
    radial-gradient(900px 420px at 95% 0%, #f8e9df 0%, transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid var(--line);
}

.top-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: linear-gradient(140deg, var(--brand) 0%, var(--brand-deep) 100%);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}

.brand small {
  display: block;
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.nav {
  margin-left: auto;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.nav a {
  font-size: 14px;
  color: var(--muted);
  padding: 6px 11px;
  border-radius: 999px;
}
.nav a:hover { background: var(--soft); text-decoration: none; color: var(--ink); }
.nav a.on { background: var(--brand); color: #fff; }

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px 72px;
}

.hero {
  margin: 28px 0 26px;
  padding: 40px 38px;
  border-radius: 22px;
  background:
    radial-gradient(600px 220px at 88% -20%, rgba(255, 255, 255, 0.28) 0%, transparent 70%),
    linear-gradient(135deg, #0b5a6b 0%, #0d6e7a 52%, #14808b 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -110px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}
.hero h1 {
  margin: 0 0 10px;
  font-size: 30px;
  letter-spacing: 0.01em;
  line-height: 1.35;
}
.hero p { margin: 0; max-width: 720px; color: rgba(255, 255, 255, 0.86); font-size: 15px; }
.hero .meta {
  margin-top: 22px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.chip {
  display: inline-block;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 12.5px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #fff;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 0 0 20px;
}

.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.card:hover {
  text-decoration: none;
  transform: translateY(-2px);
  border-color: #b9d5dd;
  box-shadow: 0 12px 30px rgba(13, 94, 110, 0.10);
}
.card h2 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.card .tag {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--brand);
  background: var(--soft);
  border-radius: 6px;
  padding: 2px 8px;
}

article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 40px 44px 44px;
  box-shadow: 0 18px 50px rgba(16, 43, 57, 0.05);
}

article h1 {
  margin: 0 0 8px;
  font-size: 28px;
  line-height: 1.4;
}
.subtitle { margin: 0 0 22px; color: var(--muted); font-size: 14px; }

.divider {
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
  margin: 26px 0;
}

article h2 {
  margin: 34px 0 10px;
  font-size: 19px;
  line-height: 1.5;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
article h2 .n {
  flex: 0 0 auto;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  background: var(--brand);
  border-radius: 7px;
  padding: 2px 8px;
  letter-spacing: 0.04em;
  transform: translateY(-1px);
}
article h3 { margin: 22px 0 6px; font-size: 16px; }
article p { margin: 8px 0; }
article ul, article ol { margin: 8px 0; padding-left: 22px; }
article li { margin: 4px 0; }

.note {
  margin: 18px 0;
  padding: 14px 18px;
  border-radius: 12px;
  background: #fff7f2;
  border: 1px solid #f4d8c8;
  color: #7a4326;
  font-size: 14px;
}
.note strong { color: #a54f27; }

.callout {
  margin: 18px 0;
  padding: 16px 20px;
  border-radius: 12px;
  background: var(--soft);
  border-left: 4px solid var(--brand);
  font-size: 14.5px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0 8px;
  font-size: 14px;
  display: table;
}
th, td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  vertical-align: top;
  text-align: left;
}
th { background: #eef5f7; font-weight: 600; white-space: nowrap; }
tbody tr:nth-child(even) td { background: #fbfdfe; }
.table-scroll { overflow-x: auto; }

.kv {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  margin: 14px 0;
  font-size: 14.5px;
}
.kv dt, .kv dd {
  margin: 0;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}
.kv dt { background: #f6fbfc; color: var(--muted); font-weight: 600; }
.kv dd { background: #fff; }
.kv > *:nth-last-child(2), .kv > *:last-child { border-bottom: 0; }

footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 26px 20px 48px;
  color: var(--muted);
  font-size: 13px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
}
footer a { color: var(--muted); }

@media (max-width: 760px) {
  .hero { padding: 30px 22px; margin-top: 18px; }
  .hero h1 { font-size: 23px; }
  .cards { grid-template-columns: 1fr; }
  article { padding: 26px 20px 30px; border-radius: 16px; }
  article h1 { font-size: 23px; }
  .kv { grid-template-columns: 1fr; }
  .kv dt { border-bottom: 0; padding-bottom: 2px; background: #f8fcfd; }
  .kv dd { padding-top: 2px; }
  .nav { width: 100%; margin-left: 0; }
  .nav a { padding: 5px 9px; }
}

@media print {
  body { background: #fff; }
  .top, footer, .hero .meta { display: none; }
  article { border: 0; box-shadow: none; padding: 0; }
  .hero { background: #fff; color: var(--ink); padding: 0 0 10px; }
  .hero p { color: var(--muted); }
  a { color: var(--ink); }
}