:root {
  --bg: #0b0f14;
  --panel: #121820;
  --ink: #e8eef6;
  --muted: #9aa8b8;
  --line: #243041;
  --accent: #2dd4bf;
  --link: #5eead4;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  font-size: 16px;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 28px 20px 64px;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.badge {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  border: 1px solid rgba(45, 212, 191, 0.35);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 10px;
}
h1 {
  font-size: 28px;
  line-height: 1.25;
  margin: 0 0 8px;
  font-weight: 750;
}
.meta {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 22px;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 18px 8px;
  margin-bottom: 18px;
}
h2 {
  font-size: 18px;
  margin: 22px 0 10px;
  font-weight: 700;
}
h3 {
  font-size: 15px;
  margin: 16px 0 8px;
  font-weight: 650;
}
p, li { color: #d5dde8; }
ul { padding-left: 1.2em; }
li { margin-bottom: 6px; }
table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 16px;
  font-size: 14px;
}
th, td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
th { background: rgba(255,255,255,0.03); color: var(--ink); }
.note {
  color: var(--muted);
  font-size: 13px;
}
.footer {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}
.lang-switch {
  float: right;
  font-size: 13px;
}
.zh { display: block; }
.en { display: none; }
html[lang="en"] .zh { display: none; }
html[lang="en"] .en { display: block; }
html[lang="en"] .en-inline { display: inline; }
.en-inline { display: none; }