* { margin:0; padding:0; box-sizing:border-box; }
:root {
  --primary:#1d4ed8;
  --primary-deep:#1e3a8a;
  --accent:#38bdf8;
  --ink:#0f172a;
  --text:#334155;
  --muted:#64748b;
  --bg:#f1f5f9;
  --border:#cbd5e1;
  --panel:#fff;
}
body {
  font-family:"Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  background:
    radial-gradient(ellipse 70% 45% at 0% -10%, rgba(56,189,248,.22), transparent),
    radial-gradient(ellipse 55% 35% at 100% 0%, rgba(29,78,216,.12), transparent),
    var(--bg);
  color:var(--text);
  line-height:1.75;
  min-height:100vh;
}
.container { max-width:1600px; margin:0 auto; padding:0 28px; }
a { color:var(--primary); text-decoration:none; }
a:hover { text-decoration:underline; }
.btn { display:inline-flex; align-items:center; justify-content:center; min-height:42px; padding:0 18px; border-radius:10px; font-weight:600; border:0; cursor:pointer; }
.btn-primary { background:linear-gradient(90deg,var(--primary-deep),var(--primary)); color:#eff6ff; }
.header {
  background:linear-gradient(105deg,#0f172a,#1e3a8a 55%,#1d4ed8);
  color:#dbeafe;
  position:sticky; top:0; z-index:30;
  box-shadow:0 8px 24px rgba(15,23,42,.2);
}
.header .container { display:flex; align-items:center; justify-content:space-between; min-height:68px; gap:16px; }
.logo { display:flex; gap:12px; align-items:center; color:#fff; text-decoration:none; }
.logo:hover, .logo:focus { text-decoration:none; color:#fff; }
.logo > span:not(.logo-mark) { display:flex; flex-direction:column; justify-content:center; gap:1px; line-height:1.15; }
.logo-mark {
  min-width:48px; height:40px; padding:0 8px; border-radius:12px;
  background:linear-gradient(135deg,#7dd3fc,#38bdf8);
  display:flex; align-items:center; justify-content:center;
  font-weight:800; color:#0f172a; font-size:13px;
  font-family:Consolas,"Cascadia Code",monospace;
  letter-spacing:.04em;
}
.logo b { display:block; font-size:16px; line-height:1.2; margin:0; }
.logo small { display:block; font-size:11px; line-height:1.2; margin:0; opacity:.8; }
.nav { display:flex; gap:14px; list-style:none; flex-wrap:wrap; }
.nav a { color:#bfdbfe; font-size:14px; text-decoration:none; }
.nav a:hover { color:#fff; }
.hero {
  padding:48px 0 28px; text-align:center;
  background:
    linear-gradient(180deg, rgba(219,234,254,.7), transparent),
    repeating-linear-gradient(0deg, transparent, transparent 27px, rgba(29,78,216,.05) 28px),
    repeating-linear-gradient(90deg, transparent, transparent 27px, rgba(29,78,216,.05) 28px);
}
.hero-kicker { font-size:13px; letter-spacing:.06em; color:var(--primary); font-weight:700; margin-bottom:8px; }
.hero h1 {
  font-size:clamp(28px,3.6vw,42px); color:var(--ink); font-weight:800;
  font-family:Georgia,"Source Han Serif SC","Noto Serif SC",serif;
}
.hero p { margin:12px auto 0; max-width:760px; color:var(--muted); }
.search-box { margin:22px auto 0; max-width:520px; }
.search-box input {
  width:100%; height:48px; border:1px solid var(--border); border-radius:12px;
  padding:0 16px; font-size:15px; background:#fff; outline:none;
  box-shadow:0 10px 28px rgba(29,78,216,.08); font-family:inherit;
}
.search-box input:focus { border-color:var(--accent); }
.search-hint { margin-top:10px; font-size:13px; color:#b45309; min-height:1.2em; }
.cat-nav { display:flex; flex-wrap:wrap; gap:8px; margin:28px 0 8px; justify-content:center; }
.cat-nav a {
  display:inline-flex; align-items:center; min-height:34px; padding:0 12px; border-radius:8px;
  background:#fff; border:1px solid var(--border); color:var(--primary-deep); font-size:13px; text-decoration:none;
}
.cat-nav a:hover, .cat-nav a.is-active { background:#eff6ff; border-color:#93c5fd; }
.section { padding:22px 0 8px; }
.section h2 { font-size:22px; color:var(--ink); margin-bottom:14px; display:flex; align-items:baseline; gap:10px; flex-wrap:wrap; }
.section h2 .count { font-size:13px; color:var(--muted); font-weight:500; }
.section h2 .cat-more { margin-left:auto; font-size:13px; font-weight:600; color:var(--primary); }
.grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:14px; }
.card {
  background:var(--panel); border:1px solid var(--border); border-radius:14px; padding:18px;
  transition:transform .2s, box-shadow .2s; display:block; color:inherit; text-decoration:none;
}
.card:hover { transform:translateY(-3px); box-shadow:0 14px 30px rgba(29,78,216,.12); text-decoration:none; }
.card .cat { font-size:12px; color:#1d4ed8; font-weight:700; }
.card b { display:block; margin:6px 0; color:var(--ink); font-size:16px; }
.card p { font-size:13px; color:var(--muted); }
.breadcrumb { padding:16px 0 0; font-size:13px; color:var(--muted); }
.breadcrumb a { color:var(--primary); }
.article-wrap { display:grid; grid-template-columns:1fr 300px; gap:28px; padding:20px 0 40px; }
.article { background:#fff; border:1px solid var(--border); border-radius:16px; padding:28px; }
.term-badge { display:inline-block; font-size:12px; font-weight:700; color:#1e3a8a; background:#dbeafe; padding:4px 10px; border-radius:8px; margin-bottom:12px; }
.article h1 { font-size:28px; color:var(--ink); line-height:1.35; margin-bottom:10px; font-family:Georgia,"Source Han Serif SC",serif; }
.article .meta { font-size:13px; color:var(--muted); margin-bottom:18px; }
.article h2 { font-size:20px; margin:24px 0 10px; color:var(--ink); }
.article h3 { font-size:16px; margin:14px 0 6px; color:var(--ink); }
.article ul,.article ol { padding-left:20px; margin:8px 0 14px; }
.article li { margin:6px 0; }
.article p { margin:10px 0; }
.struct-list { background:#f8fafc; border:1px solid var(--border); border-radius:12px; padding:14px 14px 14px 32px; }
.copy-block { border-radius:12px; overflow:hidden; border:1px solid #1e293b; margin:10px 0 14px; background:#0f172a; }
.copy-bar { display:flex; justify-content:space-between; align-items:center; padding:8px 12px; background:#1e293b; color:#94a3b8; font-size:12px; }
.copy-btn { border:0; border-radius:6px; padding:5px 10px; background:#38bdf8; color:#0f172a; cursor:pointer; font-weight:700; font-size:12px; }
.copy-pre { margin:0; padding:14px; color:#e2e8f0; font-family:Consolas,"Cascadia Code",monospace; font-size:13px; white-space:pre-wrap; line-height:1.55; }
.faq-item { background:#f8fafc; border:1px solid var(--border); border-radius:12px; padding:14px 16px; margin:10px 0; }
.side .card { margin-bottom:12px; }
.side .card b { margin-bottom:8px; }
.side .card p { margin:6px 0; font-size:14px; }
.side-ad { text-align:center; background:linear-gradient(180deg,#eff6ff,#fff 42%); border-color:#93c5fd; }
.side-ad-title { display:block; font-size:16px; color:#1e3a8a; margin-bottom:6px !important; }
.side-ad-desc { font-size:13px !important; color:var(--muted); margin:0 0 12px !important; line-height:1.55; }
.side-ad-qr { display:inline-block; padding:8px; background:#fff; border:1px solid var(--border); border-radius:12px; line-height:0; }
.side-ad-qr img { width:168px; height:168px; object-fit:contain; display:block; border-radius:4px; }
.side-ad-tip { margin:10px 0 8px !important; font-size:12px !important; color:#64748b; }
.side-ad-link { display:inline-block; font-size:13px; font-weight:700; color:var(--primary-deep); }
.cta-box { background:#eff6ff; border:1px solid #93c5fd; border-radius:14px; padding:16px; margin-top:24px; }
.friend-links { background:#fff; border-top:1px solid var(--border); padding:24px 0; }
.friend-links-title { font-size:15px; font-weight:700; color:var(--ink); margin-bottom:12px; }
.friend-links-list { list-style:none; display:flex; flex-wrap:wrap; gap:10px 18px; }
.friend-links-list a { color:var(--muted); font-size:13px; }
.footer { background:#0f172a; color:#94a3b8; padding:36px 0 0; margin-top:20px; }
.footer-grid { display:grid; grid-template-columns:minmax(0,2fr) minmax(0,1fr) minmax(0,1.4fr); gap:24px; padding-bottom:24px; align-items:start; }
.footer b,.footer h4 { color:#dbeafe; display:block; margin-bottom:10px; }
.footer a { color:#7dd3fc; display:block; margin:6px 0; font-size:14px; }
.footer-cats { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:0 16px; }
.footer-copy { border-top:1px solid #1e3a8a; text-align:center; padding:16px 0 24px; font-size:13px; }
.page-404 { padding:70px 0; text-align:center; }
.page-404-box { max-width:640px; margin:0 auto; background:#fff; border:1px solid var(--border); border-radius:16px; padding:40px 24px; }
.page-404-code { font-size:72px; font-weight:800; color:var(--primary); font-family:Consolas,monospace; }
.tpl-toast {
  position:fixed; left:50%; bottom:28px; transform:translateX(-50%);
  background:#0f172a; color:#fff; padding:10px 16px; border-radius:999px; z-index:80; font-size:14px;
}
.tpl-toast[hidden] { display:none; }
@keyframes tpl-fade-up {
  from { opacity:0; transform:translateY(12px); }
  to { opacity:1; transform:none; }
}
.hero h1 { animation:tpl-fade-up .55s ease both; }
.hero p { animation:tpl-fade-up .55s .08s ease both; }
.card { animation:tpl-fade-up .45s ease both; }
@media (max-width:960px) {
  .grid,.article-wrap,.footer-grid { grid-template-columns:1fr; }
  .nav { display:none; }
}