/* 原来如此 · 网站小组件百科 */
:root{
  --paper:#FAF8F4;
  --paper-2:#F3EFE7;
  --ink:#1C1A17;
  --ink-2:#4A453E;
  --muted:#8A8378;
  --line:#E7E0D3;
  --card:#FFFFFF;
  --accent:#3D5AFE;
  --sec:#D93736;
  --nav:#2563EB;
  --feat:#059669;
  --radius:16px;
  --serif:"Songti SC","STSong","Noto Serif SC","Source Han Serif SC",serif;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --mono:"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --shadow:0 1px 2px rgba(28,26,23,.05),0 8px 24px -8px rgba(28,26,23,.12);
  --shadow-lg:0 2px 4px rgba(28,26,23,.06),0 20px 48px -12px rgba(28,26,23,.18);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
::selection{background:#FFE9A8}
a{color:inherit;text-decoration:none}

/* ---------- scroll progress ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;height:3px;width:0%;
  background:linear-gradient(90deg,var(--sec),var(--nav),var(--feat));
  z-index:200;transition:width .1s linear;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(250,248,244,.88);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s;
}
.site-header.scrolled{box-shadow:0 4px 20px -8px rgba(28,26,23,.15)}
.header-inner{
  max-width:1120px;margin:0 auto;padding:0 24px;height:64px;
  display:flex;align-items:center;gap:28px;
}
.brand{display:flex;align-items:center;gap:8px;flex-shrink:0}
.brand-mark{font-size:22px}
.brand-name{font-family:var(--serif);font-size:20px;font-weight:700;letter-spacing:.06em}
.brand-sub{font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:1px 10px;background:var(--card)}
.header-nav{display:flex;gap:4px;margin-left:8px}
.header-nav a{
  font-size:14px;color:var(--ink-2);padding:8px 14px;border-radius:10px;
  transition:background .2s,color .2s;
}
.header-nav a:hover{background:var(--paper-2);color:var(--ink)}
.header-nav a.active{background:var(--ink);color:#fff}
/* 分类下拉菜单 */
.nav-drop{position:relative}
.nav-drop-btn{
  font-family:var(--sans);font-size:14px;color:var(--ink-2);
  background:transparent;border:none;cursor:pointer;
  padding:8px 14px;border-radius:10px;display:flex;align-items:center;gap:6px;
  transition:background .2s,color .2s;
}
.nav-drop-btn:hover{background:var(--paper-2);color:var(--ink)}
.nav-drop-btn.active{background:var(--ink);color:#fff}
.nav-drop-btn .caret{font-size:11px;transition:transform .2s}
.nav-drop.open .nav-drop-btn .caret{transform:rotate(180deg)}
.nav-drop-panel{
  position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(-4px);
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  box-shadow:var(--shadow-lg);padding:8px;min-width:300px;z-index:200;
  opacity:0;pointer-events:none;transition:opacity .18s,transform .18s;
}
.nav-drop.open .nav-drop-panel{opacity:1;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.nav-drop-panel[hidden]{display:none}
.cat-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px}
.cat-item:hover{background:var(--paper-2)}
.cat-item.active{background:var(--ink);color:#fff}
.cat-item.active .ci-count{color:rgba(255,255,255,.7)}
.ci-icon{font-size:20px;flex-shrink:0}
.ci-name{font-weight:600;font-size:14px}
.ci-count{margin-left:auto;font-size:12px;color:var(--muted);flex-shrink:0}
.search-trigger{
  margin-left:auto;display:flex;align-items:center;gap:8px;
  border:1px solid var(--line);background:var(--card);border-radius:12px;
  padding:8px 12px;font-size:13px;color:var(--muted);cursor:pointer;
  font-family:var(--sans);transition:border-color .2s,box-shadow .2s;
  min-width:210px;
}
.search-trigger:hover{border-color:var(--muted);box-shadow:var(--shadow)}
.search-trigger kbd{
  margin-left:auto;font-family:var(--mono);font-size:11px;background:var(--paper-2);
  border:1px solid var(--line);border-radius:6px;padding:1px 7px;color:var(--ink-2);
}

/* ---------- search overlay ---------- */
.search-overlay{
  position:fixed;inset:0;z-index:300;background:rgba(28,26,23,.45);
  backdrop-filter:blur(4px);display:flex;justify-content:center;align-items:flex-start;
  padding:12vh 20px 20px;animation:fadeIn .18s ease;
}
.search-overlay[hidden]{display:none}
.search-box{
  width:100%;max-width:620px;background:var(--card);border-radius:20px;
  box-shadow:var(--shadow-lg);overflow:hidden;animation:popIn .22s cubic-bezier(.2,.9,.3,1.2);
}
.search-input-row{display:flex;align-items:center;gap:12px;padding:18px 20px;border-bottom:1px solid var(--line)}
.search-input-row svg{color:var(--muted);flex-shrink:0}
#searchInput{
  flex:1;border:none;outline:none;font-size:17px;font-family:var(--sans);
  background:transparent;color:var(--ink);
}
.search-input-row kbd{font-family:var(--mono);font-size:11px;background:var(--paper-2);border:1px solid var(--line);border-radius:6px;padding:2px 8px;color:var(--muted)}
.search-results{max-height:52vh;overflow-y:auto;padding:8px}
.search-item{
  display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;cursor:pointer;
}
.search-item:hover,.search-item.selected{background:var(--paper-2)}
.search-item .dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}
.search-item .nm{font-weight:600;font-size:15px}
.search-item .tg{font-size:12px;color:var(--muted);margin-left:auto;text-align:right;max-width:45%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.search-empty{padding:32px;text-align:center;color:var(--muted);font-size:14px}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes popIn{from{opacity:0;transform:translateY(-12px) scale(.98)}to{opacity:1;transform:none}}

/* ---------- layout ---------- */
#app{min-height:60vh}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.prose{max-width:760px;margin:0 auto}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:96px 0 72px;text-align:center;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(560px 320px at 18% 12%,rgba(217,55,54,.10),transparent 60%),
    radial-gradient(620px 360px at 82% 18%,rgba(37,99,235,.10),transparent 60%),
    radial-gradient(700px 380px at 50% 95%,rgba(5,150,105,.10),transparent 60%);
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);
  background:var(--card);border:1px solid var(--line);border-radius:999px;padding:6px 16px;
  box-shadow:var(--shadow);margin-bottom:24px;position:relative;
}
.hero h1{
  font-family:var(--serif);font-size:clamp(40px,7vw,72px);font-weight:700;
  letter-spacing:.04em;line-height:1.25;position:relative;
}
.hero h1 .hl{
  background:linear-gradient(180deg,transparent 62%,#FFE9A8 62%,#FFE9A8 94%,transparent 94%);
}
.hero p.lead{
  font-size:17px;color:var(--ink-2);max-width:640px;margin:20px auto 0;position:relative;
}
.hero-stats{
  display:flex;justify-content:center;gap:40px;margin-top:36px;position:relative;flex-wrap:wrap;
}
.hero-stat{text-align:center}
.hero-stat .n{font-family:var(--serif);font-size:34px;font-weight:700}
.hero-stat .l{font-size:13px;color:var(--muted);margin-top:2px}
.hero-stat.s1 .n{color:var(--sec)}.hero-stat.s2 .n{color:var(--nav)}.hero-stat.s3 .n{color:var(--feat)}

/* ---------- category cards ---------- */
.cat-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:8px 0 64px}
.cat-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px;box-shadow:var(--shadow);position:relative;overflow:hidden;
  transition:transform .25s,box-shadow .25s;display:block;
}
.cat-card::after{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--c);
}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.cat-card .emoji{font-size:34px}
.cat-card h3{font-family:var(--serif);font-size:22px;margin:12px 0 6px}
.cat-card p{font-size:14px;color:var(--muted);line-height:1.7}
.cat-card .count{margin-top:14px;font-size:13px;font-weight:600;color:var(--c)}
.cat-card .go{margin-top:6px;font-size:13px;color:var(--ink-2)}
.cat-card .go::after{content:" →"}

/* ---------- section titles ---------- */
.sec-head{display:flex;align-items:baseline;gap:14px;margin:0 0 24px}
.sec-head h2{font-family:var(--serif);font-size:30px;letter-spacing:.03em}
.sec-head .more{margin-left:auto;font-size:14px;color:var(--muted)}
.sec-head .more:hover{color:var(--ink)}

/* ---------- component cards grid ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:8px;
  transition:transform .22s,box-shadow .22s;position:relative;overflow:hidden;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.card .meta{display:flex;align-items:center;gap:8px}
.card .dot{width:9px;height:9px;border-radius:50%}
.card .catname{font-size:12px;color:var(--muted)}
.card h3{font-size:18px;font-weight:700;line-height:1.45}
.card .tagline{font-size:13.5px;color:var(--ink-2);flex:1}
.card .foot{font-size:13px;color:var(--muted);border-top:1px dashed var(--line);padding-top:10px;margin-top:4px}
.card .foot b{color:var(--ink-2);font-weight:600}

/* category page hero */
.cat-hero{padding:72px 0 40px;text-align:left}
.cat-hero .kicker{
  display:inline-block;font-size:13px;font-weight:700;color:#fff;background:var(--c);
  border-radius:999px;padding:4px 16px;margin-bottom:16px;letter-spacing:.1em;
}
.cat-hero h1{font-family:var(--serif);font-size:clamp(34px,5vw,52px);letter-spacing:.03em}
.cat-hero p{color:var(--ink-2);max-width:680px;margin-top:12px;font-size:16px}

/* ---------- detail page ---------- */
.detail-hero{padding:56px 0 8px}
.crumb{font-size:13px;color:var(--muted);margin-bottom:18px}
.crumb a:hover{color:var(--ink)}
.crumb .sep{margin:0 8px}
.detail-hero .kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  color:var(--c);background:color-mix(in srgb,var(--c) 10%,#fff);
  border:1px solid color-mix(in srgb,var(--c) 30%,#fff);
  border-radius:999px;padding:5px 16px;margin-bottom:16px;
}
.detail-hero h1{font-family:var(--serif);font-size:clamp(32px,5vw,48px);letter-spacing:.02em;line-height:1.3}
.detail-hero .tagline{font-size:18px;color:var(--ink-2);margin-top:10px;max-width:700px}
.alias-row{margin-top:12px;display:flex;gap:8px;flex-wrap:wrap}
.alias{font-size:12px;background:var(--paper-2);border:1px solid var(--line);border-radius:999px;padding:2px 12px;color:var(--muted)}

.scene-card{
  background:var(--card);border:1px solid var(--line);border-left:5px solid var(--c);
  border-radius:var(--radius);padding:24px 28px;margin:32px 0;box-shadow:var(--shadow);
}
.scene-card .label{font-size:13px;font-weight:700;color:var(--c);letter-spacing:.12em;margin-bottom:8px}
.scene-card p{font-size:16px;color:var(--ink-2)}

.dsec{margin:48px 0}
.dsec-head{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.dsec-head .num{
  width:38px;height:38px;border-radius:12px;background:var(--ink);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;flex-shrink:0;
}
.dsec-head h2{font-family:var(--serif);font-size:26px;letter-spacing:.02em}
.dsec-head .en{font-size:12px;color:var(--muted);letter-spacing:.08em;margin-left:2px}
.detail-text{font-size:16px;color:var(--ink-2);line-height:1.9}
.detail-text p+p{margin-top:14px}

/* 原理：一句话结论卡片（结论先行） */
.psummary{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--c);
  border-radius:12px;padding:16px 20px;margin:0 0 6px;box-shadow:var(--shadow)}
.psummary .plabel{display:block;font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--c);margin-bottom:8px}
.psummary p{margin:0;font-size:17px;line-height:1.8;color:var(--ink)}
/* 原理：详细解读按段落分块，不再是一堵文字墙 */
.deep-label{font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--muted);margin:30px 0 14px}
.dpara{background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:15px 20px;margin-bottom:12px}
.dpara p{margin:0;font-size:16px;line-height:2;color:var(--ink-2)}

/* 原理流程图 */
.flow-label{font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--c);margin:28px 0 14px}
.flow{list-style:none;max-width:660px;display:flex;flex-direction:column}
.fstep{
  position:relative;background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:14px 18px 14px 64px;box-shadow:var(--shadow);
  font-size:15.5px;color:var(--ink);line-height:1.7;
}
.fstep .n{
  position:absolute;left:14px;top:50%;transform:translateY(-50%);
  width:32px;height:32px;border-radius:10px;color:#fff;font-weight:700;font-size:14px;
  background:linear-gradient(135deg,var(--c),color-mix(in srgb,var(--c) 72%,#000));
  display:flex;align-items:center;justify-content:center;
}
.fstep p{margin:0}
.farrow{
  text-align:center;color:var(--c);font-size:19px;line-height:1.15;font-weight:700;
  animation:bob 1.8s ease-in-out infinite;user-select:none;
}
@keyframes bob{0%,100%{transform:translateY(0);opacity:.5}50%{transform:translateY(5px);opacity:1}}

/* options */
.opt-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:22px}
.opt{
  background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;
}
.opt .on{font-weight:700;font-size:15.5px;display:flex;align-items:center;gap:8px}
.opt .on::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--c);flex-shrink:0}
.opt .od{font-size:14px;color:var(--ink-2);margin-top:6px}
.opt .ow{font-size:13px;color:var(--muted);margin-top:8px;background:var(--paper-2);border-radius:8px;padding:6px 12px;display:inline-block}
.dev-steps{list-style:none;counter-reset:ds;margin:0 0 22px}
.dev-steps li{
  counter-increment:ds;position:relative;padding:10px 0 10px 52px;font-size:15.5px;color:var(--ink-2);
  border-bottom:1px dashed var(--line);
}
.dev-steps li::before{
  content:counter(ds);position:absolute;left:0;top:8px;width:32px;height:32px;border-radius:10px;
  background:color-mix(in srgb,var(--c) 12%,#fff);color:var(--c);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;
}

/* code block */
.codeblock{margin:0 0 22px;border-radius:14px;overflow:hidden;box-shadow:var(--shadow);border:1px solid #2A2A2E}
.codeblock .chead{
  background:#232327;color:#B9B9C2;font-size:12.5px;display:flex;align-items:center;gap:10px;
  padding:10px 16px;font-family:var(--mono);
}
.codeblock .chead .dots{display:flex;gap:6px}
.codeblock .chead .dots i{width:10px;height:10px;border-radius:50%;display:block}
.codeblock .chead .dots i:nth-child(1){background:#FF5F57}
.codeblock .chead .dots i:nth-child(2){background:#FEBC2E}
.codeblock .chead .dots i:nth-child(3){background:#28C840}
.copy-btn{
  margin-left:auto;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);
  color:#E8E8EC;border-radius:8px;padding:4px 12px;font-size:12px;cursor:pointer;font-family:var(--sans);
  transition:background .2s;
}
.copy-btn:hover{background:rgba(255,255,255,.16)}
.codeblock pre{
  background:#1E1E22;color:#E8E8EC;font-family:var(--mono);font-size:13.5px;line-height:1.7;
  padding:18px 20px;overflow-x:auto;
}
.codeblock pre .c{color:#7A7A85}.codeblock pre .k{color:#C792EA}.codeblock pre .s{color:#C3E88D}
.codeblock pre .f{color:#82AAFF}.codeblock pre .n{color:#F78C6C}

/* pitfalls */
.pitfalls{list-style:none;display:flex;flex-direction:column;gap:10px}
.pitfalls li{
  background:#FFF7F5;border:1px solid #F3D9D4;border-radius:12px;padding:14px 18px 14px 48px;
  font-size:15px;color:var(--ink-2);position:relative;
}
.pitfalls li::before{content:"⚠️";position:absolute;left:16px;top:13px}

/* sources */
.sources{list-style:none;display:flex;flex-direction:column;gap:8px}
.sources a{
  display:flex;align-items:center;gap:10px;font-size:14px;color:var(--ink-2);
  background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 16px;
  transition:border-color .2s;
}
.sources a:hover{border-color:var(--c)}
.sources a .ext{margin-left:auto;color:var(--muted);font-size:12px;flex-shrink:0}

/* prev next */
.pn-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:64px 0 24px}
.pn{
  border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;background:var(--card);
  transition:transform .2s,box-shadow .2s;display:block;
}
.pn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.pn .dir{font-size:12px;color:var(--muted);letter-spacing:.1em}
.pn .nm{font-weight:700;font-size:16px;margin-top:4px}
.pn.next{text-align:right}

/* about page */
.about-hero{padding:80px 0 32px;text-align:center}
.about-hero h1{font-family:var(--serif);font-size:clamp(32px,5vw,48px)}
.about-body{font-size:16px;color:var(--ink-2);line-height:2}
.about-body p{margin-bottom:18px}
.about-body h3{font-family:var(--serif);font-size:22px;color:var(--ink);margin:32px 0 12px}
.dim-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:20px 0}
.dim{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.dim h4{font-size:17px;margin-bottom:8px}
.dim p{font-size:14.5px;color:var(--ink-2)}

/* chain 链条（玻璃拟态 + 液态背景） */
.chain{
  position:relative;overflow:hidden;border-radius:22px;margin:0 0 36px;
  border:1px solid var(--line);background:var(--paper-2);
}
.chain-bg{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.chain-bg i{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;animation:drift 16s ease-in-out infinite alternate}
.chain-bg i:nth-child(1){width:360px;height:360px;background:color-mix(in srgb,var(--c) 32%,#fff);top:-130px;left:-90px}
.chain-bg i:nth-child(2){width:300px;height:300px;background:#FFE9A8;bottom:-110px;right:-70px;animation-delay:-6s}
.chain-bg i:nth-child(3){width:220px;height:220px;background:color-mix(in srgb,var(--c) 18%,#fff);top:42%;left:58%;animation-delay:-11s}
@keyframes drift{from{transform:translate(0,0) scale(1)}to{transform:translate(46px,34px) scale(1.14)}}
.chain-head{position:relative;padding:28px 30px 4px}
.chain-title{font-family:var(--serif);font-size:22px;font-weight:700;letter-spacing:.02em}
.chain-desc{display:block;font-size:13.5px;color:var(--muted);margin-top:6px}
.chain-list{position:relative;list-style:none;max-width:680px;margin:0 auto;padding:20px 30px 34px}
.chain-list::before{
  content:"";position:absolute;left:63px;top:34px;bottom:48px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--c),color-mix(in srgb,var(--c) 22%,#fff));
  opacity:.75;
}
.chain-item{position:relative;margin:0 0 10px}
.chain-item a{
  position:relative;display:flex;align-items:center;gap:14px;
  background:rgba(255,255,255,.68);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.9);
  outline:1px solid var(--line);
  border-radius:16px;padding:13px 18px;
  box-shadow:0 1px 2px rgba(28,26,23,.05),0 10px 28px -12px rgba(28,26,23,.16);
  transition:transform .22s,box-shadow .22s;
}
.chain-item a:hover{transform:translateX(6px);box-shadow:var(--shadow-lg)}
.chain-num{
  width:38px;height:38px;border-radius:50%;flex-shrink:0;position:relative;z-index:1;
  background:var(--c);color:#fff;font-weight:700;font-size:15px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 0 5px color-mix(in srgb,var(--c) 13%,transparent);
}
.chain-body{display:flex;flex-direction:column;gap:2px;min-width:0}
.chain-name{font-weight:700;font-size:15.5px}
.chain-tag{font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chain-go{margin-left:auto;color:var(--c);font-weight:700;font-size:19px;flex-shrink:0;transition:transform .2s}
.chain-item a:hover .chain-go{transform:translateX(4px)}

/* backtop 悬浮钮 */
.backtop{
  position:fixed;right:28px;bottom:28px;width:48px;height:48px;border-radius:50%;
  background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow-lg);
  font-size:20px;font-weight:700;cursor:pointer;z-index:90;color:var(--ink-2);
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transform:translateY(12px);transition:all .3s;
}
.backtop.show{opacity:1;pointer-events:auto;transform:none}
.backtop:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
/* 详情页右侧锚点导航 */
.anchor{
  position:fixed;right:max(20px,calc(50% - 630px));top:50%;transform:translateY(-50%);
  display:flex;flex-direction:column;gap:6px;z-index:50;
}
.anc{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);
  background:rgba(255,255,255,.82);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border:1px solid var(--line);border-radius:999px;padding:7px 14px;cursor:pointer;
  transition:all .2s;white-space:nowrap;
}
.anc:hover{color:var(--ink);border-color:var(--muted);transform:translateX(-2px)}
.anc.active{background:var(--ink);color:#fff;border-color:var(--ink)}
@media(max-width:1280px){.anchor{display:none}}
/* 搜索空状态 */
.search-empty .se-icon{font-size:42px;margin-bottom:10px}
.search-empty .se-hint{font-size:12.5px;color:var(--muted);margin-top:8px}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);margin-top:80px;background:var(--paper-2)}
.footer-inner{
  max-width:1120px;margin:0 auto;padding:48px 24px 24px;
  display:flex;gap:60px;flex-wrap:wrap;
}
.footer-brand{max-width:340px}
.footer-brand strong{font-family:var(--serif);font-size:20px;margin-left:6px}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:12px}
.footer-cols{display:flex;gap:60px;margin-left:auto}
.footer-col h4{font-size:13px;color:var(--muted);letter-spacing:.1em;margin-bottom:12px}
.footer-col a{display:block;font-size:14px;color:var(--ink-2);padding:4px 0}
.footer-col a:hover{color:var(--ink)}
.footer-bottom{
  max-width:1120px;margin:0 auto;padding:18px 24px 28px;font-size:12.5px;color:var(--muted);
  border-top:1px solid var(--line);
}

/* reveal animation */
.rv{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .cat-cards{grid-template-columns:1fr}
  .header-nav{display:none}
  .search-trigger{min-width:0}
  .search-trigger span{display:none}
}
@media(max-width:600px){
  .cards{grid-template-columns:1fr}
  .opt-grid,.dim-grid,.pn-nav{grid-template-columns:1fr}
  .hero{padding:64px 0 48px}
  .header-inner{gap:12px}
}