:root, html[data-theme="dark"] {
  --fg: #e8eef4;
  --muted: #8b9aab;
  --bg0: #0f1419;
  --bg1: #182029;
  --card: #151c24;
  --pri: #3d9cf0;
  --pri2: #2a7ec4;
  --ok: #6bcb8a;
  --bad: #ff8a8a;
  --line: #2a3644;
  --btn-fill: #1c2631;
  --input-bg: #0f1419;
  --guide-glow: rgba(61, 156, 240, 0.16);
  color-scheme: dark;
}

html[data-theme="light"] {
  --fg: #142033;
  --muted: #5b6b7c;
  --bg0: #f4f7fb;
  --bg1: #e8eef6;
  --card: #ffffff;
  --pri: #1f7fd6;
  --pri2: #1766ad;
  --ok: #1f8a4c;
  --bad: #c23b3b;
  --line: #d5dee8;
  --btn-fill: #ffffff;
  --input-bg: #ffffff;
  --guide-glow: rgba(31, 127, 214, 0.12);
  color-scheme: light;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.6 "IBM Plex Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--fg);
  background:
    radial-gradient(900px 420px at 12% -10%, var(--guide-glow), transparent 55%),
    linear-gradient(180deg, var(--bg0), var(--bg1));
  min-height: 100vh;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 28px 16px 72px; }
.hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.brand {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pri);
  font-weight: 650;
}
.brand img {
  border-radius: 7px;
  background: #0a162f;
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--line) 70%, transparent);
}
.theme-toggle {
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--btn-fill);
  color: var(--fg);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}
.theme-toggle:hover { border-color: var(--pri); }
.hero h1 {
  font-size: clamp(26px, 5vw, 34px);
  margin: 0 0 10px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.lede { margin: 0; color: var(--muted); max-width: 36em; }
h2 { font-size: 18px; margin: 0 0 8px; display: flex; align-items: center; gap: 10px; }
h3 { font-size: 15px; margin: 18px 0 8px; }
.n {
  display: inline-flex; width: 26px; height: 26px; border-radius: 50%;
  background: var(--pri); color: #ffffff; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
}
.card {
  background: color-mix(in srgb, var(--card) 92%, transparent);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  margin-top: 16px;
}
.card.highlight {
  border-color: color-mix(in srgb, var(--pri) 50%, var(--line));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--pri) 18%, transparent);
}
.muted { color: var(--muted); }
.muted a { color: var(--pri); }
.small { font-size: 13px; }

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 10px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--card) 88%, transparent);
}
.tab {
  flex: 1 1 100px;
  min-height: 40px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  cursor: pointer;
}
.tab[aria-selected="true"] {
  background: linear-gradient(180deg, var(--pri), var(--pri2));
  color: #ffffff;
}
.tab:hover:not([aria-selected="true"]) {
  color: var(--fg);
  background: color-mix(in srgb, var(--btn-fill) 80%, transparent);
}
.dl-panel { display: grid; gap: 10px; min-height: 48px; }
.dl-panel .btn { width: 100%; min-height: 46px; }

button, .btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 11px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--btn-fill); color: var(--fg); font: inherit; cursor: pointer; text-decoration: none;
}
button.primary, .btn.primary {
  background: linear-gradient(180deg, var(--pri), var(--pri2));
  border-color: transparent;
  color: #ffffff;
  font-weight: 650;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.18);
}
button:disabled { opacity: .6; cursor: default; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; margin-top: 8px; }
.benefits {
  margin: 14px 0 10px;
  padding-left: 1.15em;
  color: var(--muted);
  font-size: 14px;
}
.benefits li { margin: 4px 0; }
.status { margin-top: 10px; padding: 10px 12px; border-radius: 8px; background: color-mix(in srgb, var(--bg0) 55%, transparent); font-size: 14px; }
.status.ok { color: var(--ok); }
.status.bad { color: var(--bad); }
.quota { margin-top: 12px; }
.bar { height: 8px; background: var(--line); border-radius: 4px; overflow: hidden; }
.bar > div { height: 100%; width: 0; background: var(--ok); transition: width .3s; }
.row { display: flex; justify-content: space-between; font-size: 14px; margin-top: 6px; }
.copyrow { display: flex; gap: 8px; margin-top: 8px; }
.copyrow input {
  flex: 1; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--input-bg); color: var(--fg); font-size: 13px;
}
.nodes { list-style: none; padding: 0; margin: 0; }
.nodes li {
  display: flex; gap: 8px; align-items: center; padding: 8px 0;
  border-bottom: 1px solid var(--line);
}
.nodes li:last-child { border-bottom: 0; }
.nodes .name { flex: 1; }
.nodes .tag { font-size: 12px; color: var(--muted); }
.claim { display: grid; gap: 8px; margin-top: 10px; }
.claim input {
  padding: 10px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--input-bg); color: var(--fg); font: inherit;
}
ul.plain { padding-left: 18px; color: var(--muted); }
ul.plain a { color: var(--pri); }
details { margin-top: 12px; }
summary { cursor: pointer; color: var(--muted); }
code {
  font-size: 12px; background: var(--input-bg); padding: 2px 6px; border-radius: 6px;
}
.empty {
  border: 1px dashed var(--line);
  border-radius: 12px;
  padding: 18px;
  color: var(--muted);
  text-align: center;
}