:root{
  --color-primary:#06b6d4;
  --color-accent:#22d3ee;
  --ink:#e2e8f0; --ink2:#94a3b8; --ink3:#64748b;
  --bg:#0f1419; --bg-header:rgba(10,22,40,.92); --card:#1e293b;
  --line:#334155; --line2:#243044;
  --blue:#06b6d4; --blue-s:rgba(6,182,212,.14); --blue-d:#0891b2;
  --hot:#f97316; --hot-s:rgba(249,115,22,.16); --green:#34d399;
  --brand-grad:linear-gradient(90deg,#3ec6e8,#1e8fd6);
  --hero-bg:linear-gradient(135deg,#0c1929 0%,#134e4a 50%,#0e7490 100%);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:14px; line-height:1.65; -webkit-font-smoothing:antialiased;
}
a{color:var(--color-primary); text-decoration:none}
a:hover{color:var(--color-accent); text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-999px;top:auto}
.skip:focus{left:12px;top:12px;z-index:99;background:var(--card);padding:8px 12px;border-radius:8px;color:var(--ink)}

.site-header{
  background:var(--bg-header); border-bottom:1px solid rgba(120,180,220,.14);
  position:sticky; top:0; z-index:40; backdrop-filter:blur(10px);
}
.head-inner{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:16px;padding-top:8px;padding-bottom:8px}
.brand-logo{
  display:inline-flex; align-items:center; gap:11px; text-decoration:none; min-width:0; flex-shrink:0;
}
.brand-logo:hover{text-decoration:none}
.brand-logo img{
  width:40px; height:40px; border-radius:11px; object-fit:cover; flex-shrink:0;
  box-shadow:0 2px 10px rgba(31,184,217,.35);
}
.brand-text{display:flex; flex-direction:column; min-width:0; line-height:1.2}
.brand-name{
  font-size:1.15rem; font-weight:800; letter-spacing:1px;
  background:var(--brand-grad); -webkit-background-clip:text; background-clip:text; color:transparent;
  white-space:nowrap;
}
.brand-sub{font-size:11px; color:var(--ink3); letter-spacing:.08em; margin-top:3px}
.topnav{display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.topnav a{
  font-size:13px; color:var(--ink2); padding:6px 11px; border-radius:7px; text-decoration:none;
}
.topnav a:hover,.topnav a.on{background:var(--blue-s); color:var(--color-accent); text-decoration:none}

.hero{
  background:var(--hero-bg);
  color:#fff; padding:36px 0 30px; margin-bottom:22px;
}
.hero .kicker{font-size:11px;letter-spacing:.16em;opacity:.75;margin-bottom:8px;color:#a5f3fc}
.hero h1{font-size:28px;font-weight:700;line-height:1.25}
.hero .sub{margin-top:10px;font-size:14px;opacity:.9;max-width:780px;color:#cffafe}
.stats{display:flex;gap:26px;margin-top:20px;flex-wrap:wrap}
.stat b{font-size:22px;font-weight:700;display:block;line-height:1.2;color:#fff}
.stat span{font-size:12px;opacity:.75;color:#a5f3fc}

.crumb{padding:14px 0 0;font-size:12.5px}
.crumb ol{display:flex;flex-wrap:wrap;gap:6px;list-style:none;color:var(--ink3)}
.crumb li:not(:last-child)::after{content:"/";margin-left:6px;color:#475569}
.crumb a{color:var(--ink2)}

.section-title{display:flex;align-items:baseline;gap:10px;margin:28px 0 12px}
.section-title h2{font-size:17px;font-weight:700;color:var(--ink)}
.section-title em{font-style:normal;font-size:12px;color:var(--ink3)}

.hotgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:11px}
.hotcard{
  background:var(--card); border:1px solid var(--line); border-left:3px solid var(--hot);
  border-radius:10px; padding:13px 14px; transition:.18s; display:block; color:inherit; text-decoration:none;
}
.hotcard:hover{
  border-color:rgba(6,182,212,.45); box-shadow:0 8px 24px rgba(0,0,0,.35);
  transform:translateY(-2px); text-decoration:none;
}
.hotcard .r{display:flex;align-items:center;gap:7px;margin-bottom:5px}
.hotcard .r i{font-style:normal;font-size:11px;font-weight:700;color:#fff;background:var(--hot);border-radius:4px;padding:1px 6px}
.hotcard .r strong{font-size:14.5px;color:var(--ink)}
.hotcard p{font-size:12.5px;color:var(--ink2);line-height:1.55}

.controls{
  background:rgba(30,41,59,.85); border:1px solid var(--line); border-radius:12px;
  padding:12px 14px; margin:8px 0 18px;
}
.ctrlrow{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
#q{
  flex:1; min-width:200px; padding:10px 14px; font-size:14px;
  border:1px solid var(--line); border-radius:9px; background:#0f172a; color:var(--ink);
  outline:none; font-family:inherit;
}
#q:focus{border-color:var(--color-primary); box-shadow:0 0 0 3px rgba(6,182,212,.18)}
#q::placeholder{color:var(--ink3)}
#count{font-size:12px;color:var(--ink3)}
.chips{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}
.chip{
  border:1px solid var(--line); background:#0f172a; border-radius:20px; padding:5px 12px;
  font-size:12.5px; color:var(--ink2); cursor:pointer; font-family:inherit;
}
.chip:hover{border-color:rgba(6,182,212,.45); color:var(--color-accent)}
.chip.on{background:var(--color-primary); border-color:var(--color-primary); color:#042f2e; font-weight:600}

.catgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:11px;margin-bottom:8px}
.catcard{
  background:var(--card); border:1px solid var(--line); border-radius:10px; padding:14px 15px;
  display:block; color:inherit; text-decoration:none; transition:.18s;
}
.catcard:hover{
  border-color:rgba(6,182,212,.45); box-shadow:0 8px 24px rgba(0,0,0,.35);
  text-decoration:none; transform:translateY(-1px);
}
.catcard .dot{width:9px;height:9px;border-radius:50%;display:inline-block;margin-right:7px;vertical-align:middle}
.catcard strong{font-size:14.5px;vertical-align:middle;color:var(--ink)}
.catcard p{margin-top:6px;font-size:12.5px;color:var(--ink2)}
.catcard .n{margin-top:8px;font-size:11.5px;color:var(--ink3)}

.termlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:8px}
.termitem{
  background:var(--card); border:1px solid var(--line); border-radius:9px; padding:11px 13px;
  display:block; color:inherit; text-decoration:none; transition:.15s;
}
.termitem:hover{border-color:rgba(6,182,212,.45); text-decoration:none}
.termitem strong{font-size:14px;color:var(--ink);display:block}
.termitem .en{font-size:11.5px;color:var(--ink3);margin:2px 0 5px}
.termitem .def{font-size:12.5px;color:var(--ink2);line-height:1.55}
.tag{font-size:10px;font-weight:700;border-radius:4px;padding:1px 5px;margin-left:6px;vertical-align:middle}
.t-hot{background:var(--hot-s);color:var(--hot)}
.t-new{background:rgba(52,211,153,.14);color:var(--green)}
.t-fig{background:var(--blue-s);color:var(--color-accent)}

.note{
  margin:26px 0; background:rgba(14,30,54,.9); border:1px solid rgba(120,180,220,.18);
  border-radius:10px; padding:14px 16px;
}
.note h3{font-size:13.5px;color:#67e8f9;margin-bottom:7px}
.note p{font-size:12.5px;color:var(--ink2);line-height:1.7;margin-bottom:6px}
.note p:last-child{margin-bottom:0}
.note a{color:var(--color-accent)}

.site-footer{
  margin-top:40px; padding:22px 0 36px; border-top:1px solid rgba(120,180,220,.14);
  font-size:12px; color:var(--ink3); line-height:1.75; text-align:center;
}
.site-footer .wrap{text-align:center}

/* term page */
.term-hero{
  background:var(--hero-bg); color:#fff;
  border-radius:14px; padding:22px 24px 20px; margin:14px 0 18px;
}
.term-hero .kk{font-size:11px;letter-spacing:.14em;opacity:.72;margin-bottom:8px;color:#a5f3fc}
.term-hero h1{font-size:26px;font-weight:700;line-height:1.25}
.term-hero .den{color:rgba(255,255,255,.88);font-size:13px;margin-top:6px}
.term-hero .tgs{margin-top:11px;display:flex;gap:6px;flex-wrap:wrap}
.term-hero .tgs span{font-size:10.5px;font-weight:700;border-radius:4px;padding:2px 8px;background:rgba(255,255,255,.16)}
.term-hero .tgs span.h{background:var(--hot)}
.term-hero .tgs span.n{background:#059669}

.panel{background:var(--card); border:1px solid var(--line); border-radius:12px; margin-bottom:14px; overflow:hidden}
.dsec{padding:18px 22px;border-bottom:1px solid var(--line2)}
.dsec:last-child{border-bottom:none}
.dsec>h2{
  font-size:13px; font-weight:700; color:var(--color-accent); letter-spacing:.04em;
  margin-bottom:11px; display:flex; align-items:center; gap:8px;
}
.dsec>h2::before{content:"";width:3px;height:13px;background:var(--color-primary);border-radius:2px}
.dsec>h2 em{font-style:normal;font-weight:400;font-size:11.5px;color:var(--ink3);letter-spacing:0}
.ddef{font-size:15.5px;line-height:1.78;color:var(--ink);font-weight:500}
.dplain{
  margin-top:11px; background:rgba(6,182,212,.08); border-left:3px solid rgba(6,182,212,.45);
  border-radius:0 8px 8px 0; padding:10px 13px; font-size:13.5px; color:var(--ink2); line-height:1.75;
}
.dplain b{color:var(--color-accent)}
.dlong p{font-size:14px;line-height:1.88;color:var(--ink2);margin-bottom:11px}
.dlong p:last-child{margin-bottom:0}
.dlong p b{color:var(--ink);font-weight:600}
ul.pts{margin:0;padding:0;list-style:none}
ul.pts li{font-size:13px;color:var(--ink2);padding-left:14px;position:relative;margin-bottom:5px;line-height:1.65}
ul.pts li::before{content:"";position:absolute;left:2px;top:9px;width:4px;height:4px;border-radius:50%;background:var(--color-primary)}
.dkey{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:9px}
.dkey .k{background:#0f172a;border:1px solid var(--line);border-radius:9px;padding:11px 12px}
.dkey .k b{display:block;font-size:17px;font-weight:700;color:var(--color-accent);line-height:1.3;word-break:break-word}
.dkey .k span{font-size:11.5px;color:var(--ink3);display:block;margin-top:5px;line-height:1.55}
.dmix .r{font-size:13px;line-height:1.78;color:var(--ink2);padding:9px 0;border-top:1px dashed var(--line2)}
.dmix .r:first-child{border-top:none;padding-top:0}
.dmix .r b{color:var(--ink);font-weight:600}
.drelc,.dsame{display:flex;flex-wrap:wrap;gap:7px}
.drelc a,.dsame a{
  border:1px solid rgba(6,182,212,.28); background:var(--blue-s); color:var(--color-accent);
  border-radius:7px; padding:6px 11px; font-size:12.5px; text-decoration:none;
}
.drelc a:hover,.dsame a:hover{
  background:var(--color-primary); color:#042f2e; border-color:var(--color-primary); text-decoration:none;
}
.drelc span.dead{
  border:1px solid var(--line); background:#0f172a; color:var(--ink3);
  border-radius:7px; padding:6px 11px; font-size:12.5px;
}
.dsame a{background:#0f172a; border-color:var(--line); color:var(--ink2)}
.dsame a:hover{border-color:var(--color-primary); color:var(--color-accent); background:#0f172a}
.dnote{
  background:rgba(14,30,54,.9); border:1px solid rgba(120,180,220,.18);
  border-radius:9px; padding:12px 14px; font-size:12.5px; color:var(--ink2); line-height:1.75;
}
.dnote b{color:#67e8f9}
.figbox{
  background:#F8FBFE; border:1px solid #dbe4ef; border-radius:10px;
  padding:14px; overflow-x:auto; margin-bottom:10px; color:#1B2432;
}
.figbox:last-of-type{margin-bottom:0}
.figbox svg{display:block;width:100%;height:auto;min-width:480px}
.figcap{font-size:12px;color:#7A8899;line-height:1.7;margin-top:10px;padding-top:9px;border-top:1px dashed #E2E9F2}
.figcap b{color:#48566B}
.dnav{display:flex;gap:10px;padding:4px 0 8px}
.dnav a{
  flex:1; border:1px solid var(--line); background:var(--card); border-radius:9px; padding:11px 14px;
  text-decoration:none; color:inherit; min-width:0; transition:.15s;
}
.dnav a:hover{border-color:var(--color-primary); text-decoration:none}
.dnav a .d{font-size:10.5px;color:var(--ink3);display:block;margin-bottom:3px;letter-spacing:.05em}
.dnav a .t{font-size:13.5px;font-weight:700;color:var(--ink);display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dnav a.r{text-align:right}
.dnav a.empty{visibility:hidden}

.cat-hero{padding:8px 0 4px}
.cat-hero h1{font-size:24px;font-weight:700;display:flex;align-items:center;gap:10px;color:var(--ink)}
.cat-hero p{margin-top:8px;color:var(--ink2);max-width:720px}

.empty{text-align:center;padding:40px 16px;color:var(--ink3)}
.empty.hidden{display:none}

@media(max-width:640px){
  .hero h1{font-size:22px}.term-hero h1{font-size:21px}
  .wrap{padding:0 15px}.dsec{padding:15px 15px}
  .figbox svg{min-width:0}
  .dnav{flex-direction:column}
  .termlist{grid-template-columns:1fr}
  .brand-sub{display:none}
  .brand-name{font-size:1rem}
  .topnav a{padding:6px 8px;font-size:12px}
}