/* 云枢导航 - 样式表。改配色只改 :root 里的变量即可 */
:root {
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --card: #ffffff;
  --ink: #1f2937;
  --ink-2: #4b5563;
  --ink-3: #9ca3af;
  --line: #e8eaed;
  --accent: #1e40af;
  --accent-soft: #eef3ff;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 1px 3px rgba(16, 24, 40, .06);
  --shadow-hover: 0 4px 12px rgba(16, 24, 40, .1);
  --radius: 10px;
}
html[data-theme="dark"] {
  --bg: #0f1115;
  --bg-soft: #15181e;
  --card: #1a1e25;
  --ink: #e5e7eb;
  --ink-2: #b0b6c0;
  --ink-3: #7b828d;
  --line: #262b33;
  --accent: #7aa2ff;
  --accent-soft: #1a2338;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow-hover: 0 4px 14px rgba(0, 0, 0, .45);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  font-size: 14px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

/* ---------- header ---------- */
.hd {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
html[data-theme="dark"] .hd { background: rgba(15, 17, 21, .88); }
.hd-in {
  max-width: 1240px; margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; gap: 16px;
}
.logo { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 17px; color: var(--ink); flex: none; }
.logo-mark {
  width: 28px; height: 28px; border-radius: 8px; background: var(--accent); color: #fff;
  display: grid; place-items: center; font-size: 14px; font-weight: 700;
}
.search-wrap { flex: 1; max-width: 560px; position: relative; }
.search-in {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: 999px; padding: 0 14px; height: 38px; transition: .15s;
}
.search-in:focus-within { border-color: var(--accent); background: var(--card); box-shadow: 0 0 0 3px var(--accent-soft); }
.search-in svg { flex: none; opacity: .5; }
#q { flex: 1; border: 0; outline: 0; background: transparent; color: var(--ink); font-size: 14px; min-width: 0; }
.se-select {
  border: 0; background: transparent; color: var(--ink-3); font-size: 12.5px;
  outline: none; cursor: pointer; flex: none; max-width: 92px;
}
.icon-btn {
  flex: none; width: 38px; height: 38px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--bg-soft); color: var(--ink-2); cursor: pointer; display: grid; place-items: center;
  transition: .15s;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- layout ---------- */
.wrap { max-width: 1240px; margin: 0 auto; padding: 0 20px; display: flex; gap: 28px; align-items: flex-start; }
.side {
  width: 168px; flex: none; position: sticky; top: 74px;
  max-height: calc(100vh - 100px); overflow-y: auto; padding: 22px 0;
  scrollbar-width: thin;
}
.side a {
  display: block; padding: 7px 12px; border-radius: 8px; color: var(--ink-2);
  font-size: 13.5px; margin-bottom: 2px; transition: .12s; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.side a:hover { background: var(--bg-soft); color: var(--ink); }
.side a.on { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.main { flex: 1; min-width: 0; padding: 22px 0 60px; }

/* ---------- hero ---------- */
.hero { margin-bottom: 8px; }
.hero h1 { font-size: 21px; margin: 0 0 6px; font-weight: 700; color: var(--ink); }
.hero p { margin: 0; color: var(--ink-3); font-size: 13px; }

/* ---------- section ---------- */
.sec { padding-top: 30px; scroll-margin-top: 74px; }
.sec-hd { display: flex; align-items: baseline; gap: 10px; margin-bottom: 14px; }
.sec-hd h2 { font-size: 16px; margin: 0; font-weight: 700; color: var(--ink); }
.sec-hd .desc { font-size: 12.5px; color: var(--ink-3); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 12px; }

/* ---------- card ---------- */
.card {
  display: flex; gap: 11px; padding: 13px 14px; background: var(--card);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); transition: .15s; position: relative;
}
.card:hover { border-color: var(--accent); box-shadow: var(--shadow-hover); transform: translateY(-1px); }
.ico {
  width: 34px; height: 34px; flex: none; border-radius: 8px; position: relative;
  display: grid; place-items: center; overflow: hidden;
  background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: 14px;
}
.ico::before { content: attr(data-t); }
.ico img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; padding: 6px; background: var(--card); }
.ico img.err { display: none; }
.card-b { min-width: 0; }
.card-t { display: flex; align-items: center; gap: 6px; }
.card-t strong { font-size: 14px; font-weight: 600; color: var(--ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card-d {
  font-size: 12.5px; color: var(--ink-3); line-height: 1.55; margin-top: 3px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.card:hover .card-d { color: var(--ink-2); }

/* ---------- empty ---------- */
.card.hide, .sec.hide { display: none; }
.empty { padding: 48px 0; text-align: center; color: var(--ink-3); display: none; }
.empty.on { display: block; }

/* ---------- footer ---------- */
.ft { border-top: 1px solid var(--line); background: var(--bg-soft); padding: 26px 20px 34px; }
.ft-in { max-width: 1240px; margin: 0 auto; font-size: 12.5px; color: var(--ink-3); }
.ft-in a { color: var(--ink-2); margin-right: 14px; }
.ft-in a:hover { color: var(--accent); }

/* ---------- back to top ---------- */
#top {
  position: fixed; right: 22px; bottom: 22px; width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--card); color: var(--ink-2);
  cursor: pointer; display: none; place-items: center; box-shadow: var(--shadow-hover); z-index: 40;
}
#top.on { display: grid; }

/* ---------- category page ---------- */
.crumb { font-size: 12.5px; color: var(--ink-3); margin-bottom: 14px; }
.crumb a:hover { color: var(--accent); }
.answer {
  background: var(--accent-soft); border-left: 3px solid var(--accent);
  padding: 13px 16px; border-radius: 0 8px 8px 0; margin: 0 0 20px; font-size: 13.5px; color: var(--ink-2);
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .wrap { flex-direction: column; gap: 0; }
  .side {
    width: 100%; position: sticky; top: 62px; z-index: 30; background: var(--bg);
    max-height: none; overflow-x: auto; overflow-y: hidden; display: flex; gap: 6px;
    padding: 10px 20px; border-bottom: 1px solid var(--line); margin: 0 -20px; width: calc(100% + 40px);
  }
  .side a { margin: 0; white-space: nowrap; border: 1px solid var(--line); padding: 5px 12px; }
  .side a.on { border-color: var(--accent); }
  .main { padding-top: 14px; }
  .hd-in { padding: 10px 16px; gap: 10px; }
  .logo span.txt { display: none; }
  .grid { grid-template-columns: 1fr; }
  .se-select { display: none; }
}
@media print {
  .hd, .side, #top { display: none; }
  .card { break-inside: avoid; box-shadow: none; }
}