/* SkillHub — 设计系统
   规范：8px 间距基线；字号阶梯 12/13/14/16/20/28；单品牌色；暗色跟随系统 */

:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --ink: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --line-strong: #d1d5db;
  --brand: #4f46e5;
  --brand-weak: #eef2ff;
  --brand-ink: #3730a3;
  --code-bg: #0f172a;
  --code-ink: #e2e8f0;
  --chip-bg: #ffffff;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(17, 24, 39, .06);
  --shadow-md: 0 1px 3px rgba(17, 24, 39, .07), 0 10px 28px -14px rgba(17, 24, 39, .16);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f1a;
    --card: #111827;
    --ink: #e5e7eb;
    --muted: #9ca3af;
    --line: #1f2937;
    --line-strong: #374151;
    --brand: #818cf8;
    --brand-weak: #1e1b4b;
    --brand-ink: #c7d2fe;
    --code-bg: #020617;
    --code-ink: #cbd5e1;
    --chip-bg: #111827;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .5);
    --shadow-md: 0 1px 3px rgba(0, 0, 0, .5), 0 10px 28px -14px rgba(0, 0, 0, .6);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.65 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: ui-monospace, SFMono-Regular, Consolas, "JetBrains Mono", monospace; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
h1, h2, h3 { line-height: 1.3; }
button { font: inherit; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--card) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner { display: flex; align-items: center; gap: 20px; height: 56px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; color: var(--ink); }
.logo:hover { text-decoration: none; }
.logo-mark {
  width: 26px; height: 26px; border-radius: 7px;
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: #fff; display: grid; place-items: center; font-size: 13px; font-weight: 700;
}
.topbar nav { display: flex; gap: 2px; margin-left: auto; }
.topbar nav a { color: var(--muted); padding: 6px 12px; border-radius: 8px; font-weight: 500; font-size: 13.5px; }
.topbar nav a:hover { color: var(--ink); background: var(--brand-weak); text-decoration: none; }
.topbar nav a.active { color: var(--brand-ink); background: var(--brand-weak); }

/* ---------- Hero ---------- */
.hero { border-bottom: 1px solid var(--line); background: var(--card); padding: 48px 0 40px; }
.hero h1 { margin: 0 0 10px; font-size: 28px; font-weight: 700; letter-spacing: .2px; }
.hero h1 em { font-style: normal; color: var(--brand); }
.hero p.sub { margin: 0 0 24px; color: var(--muted); font-size: 15px; max-width: 620px; }
.hero .pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 24px; }
.pill {
  font-size: 12.5px; padding: 4px 12px; border-radius: 999px;
  background: var(--bg); border: 1px solid var(--line); color: var(--muted); font-weight: 500;
}
.search-box {
  display: flex; max-width: 560px;
  background: var(--bg); border: 1px solid var(--line-strong); border-radius: var(--radius);
  padding: 4px; transition: border-color .15s, box-shadow .15s;
}
.search-box:focus-within { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-weak); }
.search-box input { flex: 1; border: 0; outline: 0; font: inherit; font-size: 14.5px; padding: 8px 12px; color: var(--ink); background: transparent; }
.search-box button {
  border: 0; cursor: pointer; background: var(--brand); color: #fff;
  font-weight: 600; padding: 8px 20px; border-radius: 7px; font-size: 13.5px;
}
.search-box button:hover { opacity: .92; }
.hero .agent-tip { margin-top: 16px; font-size: 13px; color: var(--muted); }
.hero .agent-tip code { background: var(--bg); border: 1px solid var(--line); padding: 1px 7px; border-radius: 6px; font-size: 12px; }

/* ---------- 分类 chips ---------- */
.cat-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 28px 0 8px; }
.chip {
  cursor: pointer; border: 1px solid var(--line); background: var(--chip-bg);
  color: var(--muted); border-radius: 999px; padding: 5px 14px;
  font-size: 13px; font-weight: 500; transition: .15s;
}
.chip:hover { border-color: var(--brand); color: var(--brand); }
.chip.active { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ---------- 技能卡片 ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; margin: 16px 0 40px; }
.skill-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 18px 20px; display: flex; flex-direction: column; gap: 10px;
  transition: border-color .15s, box-shadow .15s; box-shadow: var(--shadow-sm);
}
.skill-card:hover { border-color: var(--line-strong); box-shadow: var(--shadow-md); }
.skill-card .head { display: flex; align-items: center; gap: 8px; }
.skill-card .name { font-weight: 600; font-size: 15.5px; color: var(--ink); }
.skill-card .ver {
  font-size: 11.5px; color: var(--brand-ink); background: var(--brand-weak);
  border-radius: 6px; padding: 1px 7px; font-weight: 600; font-family: ui-monospace, monospace;
}
.skill-card .cat { margin-left: auto; font-size: 12px; color: var(--muted); }
.skill-card .desc {
  color: var(--muted); font-size: 13.5px; line-height: 1.6; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.skill-card .tags-row { display: flex; flex-wrap: wrap; gap: 6px; }
.tag-btn {
  cursor: pointer; border: 1px solid var(--line); background: var(--bg); color: var(--muted);
  border-radius: 6px; padding: 1px 9px; font-size: 12px; transition: .15s;
}
.tag-btn:hover { border-color: var(--brand); color: var(--brand); }
.skill-card .foot { display: flex; align-items: center; gap: 10px; margin-top: 2px; color: var(--muted); font-size: 12.5px; }
.skill-card .foot .date { font-variant-numeric: tabular-nums; }
.skill-card .foot-btns { margin-left: auto; display: flex; gap: 8px; }
.mini-btn {
  font-size: 12.5px; font-weight: 600; padding: 4px 12px; border-radius: 7px;
  border: 1px solid var(--line); color: var(--ink); background: var(--card);
}
.mini-btn:hover { border-color: var(--brand); color: var(--brand); text-decoration: none; }
.mini-btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.mini-btn.primary:hover { opacity: .92; color: #fff; }

/* ---------- 机器入口 ---------- */
.machines-title { margin: 12px 0 2px; font-size: 20px; }
.machines-sub { color: var(--muted); font-size: 13.5px; margin: 4px 0 16px; }
.for-machines { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin: 0 0 48px; }
.machine-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 16px 18px; }
.machine-card h3 { margin: 0 0 6px; font-size: 14px; }
.machine-card p { margin: 0 0 12px; font-size: 13px; color: var(--muted); }
.machine-card code { font-size: 12px; background: var(--code-bg); color: var(--code-ink); padding: 4px 9px; border-radius: 7px; display: inline-block; }

/* ---------- Agent 机器索引（默认折叠：机器读 JSON 块，人类点开才看清单） ---------- */
.agent-index { border-bottom: 1px solid var(--line); background: var(--bg); }
.agent-index summary {
  cursor: pointer; list-style: none; display: flex; align-items: center; gap: 8px;
  padding: 12px 0; color: var(--muted); font-size: 13px; font-weight: 500;
}
.agent-index summary::-webkit-details-marker { display: none; }
.agent-index summary::before { content: "▸"; font-size: 11px; transition: transform .15s; }
.agent-index[open] summary::before { transform: rotate(90deg); }
.agent-index summary code { font-size: 12px; background: var(--card); border: 1px solid var(--line); padding: 0 7px; border-radius: 6px; }
.agent-index pre {
  margin: 4px 0 16px; font-size: 12px; line-height: 1.7; color: var(--muted);
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 14px; overflow: auto; max-height: 320px;
}

/* ---------- 详情页 ---------- */
.crumb { padding: 20px 0 6px; font-size: 13px; color: var(--muted); }
.detail-head { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 26px 28px; box-shadow: var(--shadow-sm); }
.detail-head h1 { margin: 0; font-size: 24px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.ver-badge {
  font-size: 12.5px; color: var(--brand-ink); background: var(--brand-weak);
  border-radius: 7px; padding: 3px 10px; font-weight: 600; font-family: ui-monospace, monospace;
}
.meta-row { display: flex; flex-wrap: wrap; gap: 14px; color: var(--muted); font-size: 13px; margin: 12px 0 4px; }
.meta-row b { color: var(--ink); font-weight: 600; }
.detail-desc { color: var(--muted); margin: 10px 0 0; font-size: 14.5px; }
.btn {
  display: inline-flex; align-items: center; gap: 7px; border: 0; cursor: pointer;
  font: inherit; font-weight: 600; border-radius: 9px; padding: 8px 17px; font-size: 13.5px;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-ghost { background: var(--card); border: 1px solid var(--line); color: var(--ink); }
.btn-danger { background: #fee2e2; color: #dc2626; }
.btn:hover { opacity: .92; text-decoration: none; }
.action-row { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.agent-snippet {
  margin-top: 16px; background: var(--code-bg); color: var(--code-ink);
  border-radius: var(--radius); padding: 13px 16px; font-size: 12.5px; overflow-x: auto; white-space: pre;
}
.file-list { margin-top: 14px; border-top: 1px solid var(--line); padding-top: 13px; }
.file-list .file-label { font-size: 13.5px; }
.file-list .file { display: flex; gap: 10px; align-items: center; font-size: 13px; padding: 4px 0; color: var(--muted); }
.file-list .file code { background: var(--bg); padding: 2px 7px; border-radius: 6px; font-size: 12px; }
.file-list .file .size { margin-left: auto; color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }

/* ---------- Markdown 正文 ---------- */
.md-body { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px 34px; margin: 18px 0 48px; box-shadow: var(--shadow-sm); }
.md-body h1 { font-size: 22px; border-bottom: 1px solid var(--line); padding-bottom: 10px; }
.md-body h2 { font-size: 18px; margin-top: 28px; }
.md-body h3 { font-size: 15.5px; }
.md-body pre { background: var(--code-bg); color: var(--code-ink); padding: 14px 17px; border-radius: var(--radius); overflow-x: auto; font-size: 13px; }
.md-body code { background: var(--bg); padding: 2px 6px; border-radius: 6px; font-size: 13px; }
.md-body pre code { background: transparent; padding: 0; }
.md-body blockquote { border-left: 3px solid var(--brand); margin: 12px 0; padding: 2px 16px; color: var(--muted); background: var(--bg); border-radius: 0 8px 8px 0; }
.md-body table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
.md-body th, .md-body td { border: 1px solid var(--line); padding: 7px 11px; text-align: left; }
.md-body th { background: var(--bg); }

/* ---------- admin / 表单 ---------- */
.auth-card { max-width: 380px; margin: 70px auto; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px 32px; box-shadow: var(--shadow-sm); }
.auth-card h2 { margin: 0 0 4px; }
.field { margin: 14px 0; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 5px; color: var(--muted); }
.field input, .field textarea, .field select { width: 100%; border: 1px solid var(--line); border-radius: 8px; padding: 9px 12px; font: inherit; outline: none; background: var(--card); color: var(--ink); }
.field input:focus, .field textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-weak); }
.msg { font-size: 13px; margin-top: 10px; }
.msg.err { color: #dc2626; } .msg.ok { color: #059669; }
.admin-table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.admin-table th, .admin-table td { padding: 11px 15px; text-align: left; border-bottom: 1px solid var(--line); font-size: 13.5px; }
.admin-table th { background: var(--bg); font-size: 12.5px; color: var(--muted); }
.admin-table tr:last-child td { border-bottom: 0; }
.admin-head { display: flex; align-items: center; gap: 12px; margin: 26px 0 14px; }
.admin-head h2 { margin: 0; font-size: 20px; }
.admin-head .btn { margin-left: auto; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 22px 24px; margin-bottom: 18px; box-shadow: var(--shadow-sm); }
.panel h3 { margin: 0 0 10px; font-size: 15px; }

/* ---------- 其他 ---------- */
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 12.5px; padding: 20px 0 32px; }
footer a { color: var(--muted); text-decoration: underline; text-underline-offset: 2px; }
footer a:hover { color: var(--brand); }
.hidden { display: none !important; }
.tag { display: inline-block; font-size: 11.5px; background: var(--brand-weak); color: var(--brand-ink); border-radius: 6px; padding: 2px 8px; margin-right: 6px; font-weight: 600; }
.empty { text-align: center; color: var(--muted); padding: 48px 0; }

@media (max-width: 640px) {
  .wrap { padding: 0 14px; }
  .hero { padding: 32px 0 28px; }
  .hero h1 { font-size: 23px; }
  .grid { grid-template-columns: 1fr; }
  .md-body { padding: 22px 16px; overflow-x: auto; }

  /* 顶栏: 不换行, 横向可滚(移动端常见导航模式), 触控目标加大 */
  .topbar-inner { height: auto; min-height: 46px; flex-wrap: nowrap; gap: 8px; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .topbar-inner::-webkit-scrollbar { display: none; }
  .topbar .logo { flex-shrink: 0; }
  .topbar nav { margin-left: 0; gap: 4px; flex-shrink: 0; }
  .topbar nav a { padding: 8px 11px; font-size: 13px; white-space: nowrap; }

  /* 卡片触控与排版 */
  .skill-card { padding: 14px; }
  .skill-card .foot { flex-direction: column; align-items: flex-start; gap: 8px; }
  .skill-card .foot-btns { width: 100%; display: flex; gap: 8px; }
  .skill-card .foot-btns .mini-btn { flex: 1; text-align: center; padding: 10px 8px; font-size: 13.5px; }
  .skill-card .head { flex-wrap: wrap; row-gap: 4px; }

  /* 需钥指引与徽章: 窄屏不挤压 */
  .keyline { word-break: break-all; }
  .keyline code { display: inline-block; max-width: 100%; overflow-wrap: anywhere; }
  #keyguide { padding: 12px 14px; font-size: 13px; }

  /* 表格/代码块横向滚动防破版 */
  table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  pre, code { overflow-wrap: anywhere; white-space: pre-wrap; word-break: break-word; }
  pre { overflow-x: auto; white-space: pre; }

  /* 筛选 chips 横向滚动 */
  .cat-row { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 4px; scrollbar-width: none; }
  .cat-row::-webkit-scrollbar { display: none; }
  .cat-row .chip { white-space: nowrap; flex-shrink: 0; }

  /* 搜索框堆叠 */
  .search-box { flex-direction: column; }
  .search-box input { width: 100%; }
  .search-box button { width: 100%; }
}

@media (max-width: 400px) {
  .wrap { padding: 0 10px; }
  .hero h1 { font-size: 20px; }
  .topbar nav a { padding: 8px 8px; font-size: 12px; }
}