:root {
  --ink: #16202b;
  --ink-soft: #3d4b58;
  --muted: #6b7a88;
  --line: #e2e7ec;
  --bg: #f6f7f8;
  --card: #ffffff;
  --brand: #1f5f8b;
  --brand-dark: #17486a;
  --accent: #c1793f;
  --radius: 6px;
  --wrap: 1080px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}

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

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }

/* header */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 60px;
}
.logo { font-size: 19px; font-weight: 700; color: var(--ink); letter-spacing: .5px; }
.logo:hover { text-decoration: none; color: var(--brand); }
.logo .dot { color: var(--accent); }
.site-nav { display: flex; gap: 20px; margin-left: auto; font-size: 15px; }
.site-nav a { color: var(--ink-soft); }
.site-nav a:hover { color: var(--brand); text-decoration: none; }

/* search */
.search-box { position: relative; flex: 0 0 220px; }
.search-box input {
  width: 100%;
  height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--bg);
  font-size: 14px;
  color: var(--ink);
  outline: none;
}
.search-box input:focus { border-color: var(--brand); background: #fff; }
.search-result {
  position: absolute;
  top: 40px;
  left: 0;
  right: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(22, 32, 43, .1);
  max-height: 320px;
  overflow: auto;
  display: none;
}
.search-result.on { display: block; }
.search-result a { display: block; padding: 9px 12px; font-size: 14px; border-bottom: 1px solid #f0f3f5; }
.search-result a:last-child { border-bottom: 0; }
.search-result a span { color: var(--muted); font-size: 12px; margin-left: 6px; }
.search-empty { padding: 12px; color: var(--muted); font-size: 14px; }

/* main */
main { padding: 26px 0 48px; }

.crumb { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.crumb a { color: var(--muted); }
.crumb .sep { margin: 0 6px; color: #c3ccd4; }

h1 { font-size: 27px; line-height: 1.35; margin: 0 0 10px; letter-spacing: -.2px; }
h2 { font-size: 19px; margin: 34px 0 12px; padding-left: 10px; border-left: 3px solid var(--accent); line-height: 1.4; }
h3 { font-size: 16px; margin: 20px 0 8px; }
p { margin: 0 0 12px; color: var(--ink-soft); }

.lead { font-size: 16px; color: var(--ink-soft); }

/* layout */
.cols { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 28px; align-items: start; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
}
.card + .card { margin-top: 18px; }

/* hero */
.hero { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; }
.hero h1 { margin-bottom: 8px; }
.hero p { font-size: 15px; color: var(--muted); max-width: 720px; }
.stat-row { display: flex; gap: 30px; margin-top: 18px; flex-wrap: wrap; }
.stat b { display: block; font-size: 22px; color: var(--brand); line-height: 1.3; }
.stat span { font-size: 13px; color: var(--muted); }

/* tags */
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 0; }
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  background: #eef3f7;
  color: var(--brand);
  font-size: 13px;
}
.tag.plain { background: #f2f4f6; color: var(--ink-soft); }
.tag.accent { background: #fbf1e8; color: #955c2c; }

/* info table */
.facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin: 12px 0 4px; }
.facts div { background: #fff; padding: 12px 14px; font-size: 14px; }
.facts dt { color: var(--muted); font-size: 13px; margin-bottom: 2px; }
.facts dd { margin: 0; color: var(--ink); font-weight: 600; }

/* lists */
ul.plain, ol.plain { margin: 0 0 12px; padding-left: 20px; }
ul.plain li, ol.plain li { margin-bottom: 6px; color: var(--ink-soft); }

ul.check { list-style: none; padding: 0; margin: 0 0 12px; }
ul.check li { position: relative; padding-left: 20px; margin-bottom: 7px; color: var(--ink-soft); }
ul.check li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* grid of links */
.link-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; margin-top: 12px; }
.link-grid a {
  display: block;
  padding: 8px 12px;
  background: #fafbfc;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink-soft);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.link-grid a:hover { border-color: var(--brand); color: var(--brand); text-decoration: none; }
.link-grid a small { color: var(--muted); font-size: 12px; margin-left: 4px; }
.link-grid .flat-item {
  display: block;
  padding: 8px 12px;
  background: #f8fafb;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: #93a0ac;
}
.link-grid .flat-item small { color: #aab5bf; font-size: 12px; margin-left: 4px; }
.domain-card .mini span {
  font-size: 12px;
  padding: 2px 8px;
  background: #f2f4f6;
  border-radius: 10px;
  color: #93a0ac;
}
.letter-block { margin-top: 10px; }

/* domain cards */
.domain-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin-top: 14px; }
.domain-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.domain-card h3 { margin: 0 0 6px; font-size: 16px; }
.domain-card h3 a { color: var(--ink); }
.domain-card p { font-size: 13px; color: var(--muted); margin: 0 0 10px; line-height: 1.65; }
.domain-card .mini { display: flex; flex-wrap: wrap; gap: 6px; }
.domain-card .mini a { font-size: 12px; padding: 2px 8px; background: #f2f5f7; border-radius: 10px; color: var(--ink-soft); }

/* alphabet */
.alphabet { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 4px; }
.alphabet a {
  width: 34px;
  height: 34px;
  line-height: 32px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink-soft);
  background: #fff;
  text-transform: uppercase;
}
.alphabet a:hover { border-color: var(--brand); color: var(--brand); text-decoration: none; }
.alphabet .empty {
  width: 34px;
  height: 34px;
  line-height: 32px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: #c6ced5;
  background: #fafbfc;
  text-transform: uppercase;
}
.alphabet a.cur { background: var(--brand); border-color: var(--brand); color: #fff; }

/* faq */
.faq details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq details:last-child { border-bottom: 0; }
.faq summary { cursor: pointer; font-weight: 600; color: var(--ink); font-size: 15px; }
.faq p { margin: 8px 0 0; font-size: 14px; }

/* pager */
.pager { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 20px; font-size: 14px; }
.pager a, .pager span {
  min-width: 34px;
  height: 34px;
  line-height: 32px;
  text-align: center;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink-soft);
}
.pager span.cur { background: var(--brand); border-color: var(--brand); color: #fff; }
.pager a:hover { border-color: var(--brand); color: var(--brand); text-decoration: none; }

/* sidebar */
.side-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.side-card + .side-card { margin-top: 16px; }
.side-card h3 { margin: 0 0 10px; font-size: 15px; color: var(--ink); }
.side-card ul { list-style: none; margin: 0; padding: 0; }
.side-card li { padding: 5px 0; font-size: 14px; border-bottom: 1px dashed #eef1f4; }
.side-card li:last-child { border-bottom: 0; }

/* table */
.rank-table { width: 100%; border-collapse: collapse; font-size: 14px; margin-top: 10px; }
.rank-table th, .rank-table td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); }
.rank-table th { color: var(--muted); font-weight: 500; font-size: 13px; background: #fafbfc; }
.rank-table td.num { color: var(--muted); font-variant-numeric: tabular-nums; }

/* note */
.note {
  background: #fdf7f1;
  border: 1px solid #f0e0cf;
  border-radius: var(--radius);
  padding: 12px 14px;
  font-size: 13.5px;
  color: #7a5837;
  line-height: 1.7;
}

/* footer */
.site-footer { border-top: 1px solid var(--line); background: #fff; padding: 26px 0 34px; margin-top: 30px; }
.site-footer p { font-size: 13px; color: var(--muted); margin: 0 0 6px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; margin-bottom: 12px; }
.site-footer .icp { color: var(--muted); }
.site-footer .icp:hover { color: var(--brand); }

@media (max-width: 860px) {
  .cols { grid-template-columns: 1fr; }
  .header-inner { gap: 12px; height: auto; padding: 10px 0; flex-wrap: wrap; }
  .site-nav { margin-left: 0; gap: 14px; font-size: 14px; width: 100%; overflow-x: auto; }
  .search-box { flex: 1 1 100%; }
  h1 { font-size: 22px; }
  .facts { grid-template-columns: 1fr; }
  .card { padding: 18px 16px; }
}