:root{--ink:#171717;--muted:#777;--line:#dedede;--soft:#f7f7f7;--accent:#c84236}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#fff;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif}
button,input{font:inherit}
button{cursor:pointer}
#demoFx{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:20}
.demo-header{position:absolute;z-index:2;top:0;left:0;width:100%;height:64px;padding:0 max(20px,calc((100vw - 960px)/2));border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;background:#fff}
.wordmark{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-size:14px;font-weight:600}
.wordmark b{width:30px;height:30px;border:1px solid var(--ink);display:grid;place-items:center;font-size:14px}
.version{font-size:11px;color:var(--muted)}
main{min-height:100svh;padding-top:64px;display:grid;grid-template-columns:minmax(330px,38%) minmax(0,62%);overflow:hidden}
.demo-hero{position:relative;min-height:calc(100svh - 64px);padding:70px clamp(30px,5vw,74px);border-right:1px solid var(--ink);display:flex;flex-direction:column;justify-content:center}
.demo-hero::before{content:"";position:absolute;top:0;left:clamp(30px,5vw,74px);height:38px;border-left:1px solid var(--ink)}
.overline{margin:0 0 24px;font-size:13px;color:var(--muted)}
h1{margin:0;font-size:clamp(42px,5vw,66px);font-weight:600;line-height:1.12;letter-spacing:-.045em}
h1 span{font-weight:400}
.intro{margin:24px 0 46px;color:var(--muted);font-size:15px}
.demo-search{width:min(100%,400px)}
.demo-search label{display:block;margin-bottom:10px;font-size:13px}
.search-line{display:flex;border-bottom:1px solid var(--ink)}
.search-line input{flex:1;min-width:0;border:0;background:#fff;outline:none;padding:15px 0;font-size:16px}
.search-line input::placeholder{color:#aaa}
.search-line button{width:92px;border:0;background:none;display:flex;align-items:center;justify-content:flex-end;gap:12px;font-size:14px}
.search-line button i{font-size:18px;font-style:normal}
.search-line button:disabled{opacity:.45}
.demo-search small{display:block;margin-top:10px;color:#aaa;font-size:10px}
.demo-map-section{min-width:0;min-height:calc(100svh - 64px);padding:46px clamp(24px,3.2vw,52px) 30px;background:#fff}
.map-title{display:flex;justify-content:space-between;align-items:end}
.map-title span{font-size:12px;color:var(--muted)}
.map-title h2{margin:6px 0 0;font-size:clamp(28px,3.4vw,44px);font-weight:500;letter-spacing:-.035em}
.count{display:flex;align-items:baseline;gap:8px}
.count b{font-size:36px;font-weight:400}
.count small{font-size:10px;color:var(--muted)}
.linear-progress{height:1px;background:var(--line);margin:18px 0}
.linear-progress i{display:block;width:0;height:2px;background:var(--accent);transform:translateY(-.5px);transition:width .8s}
.demo-map{position:relative;height:clamp(430px,calc(100svh - 245px),650px);background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:10% 14.285%;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.demo-node{position:absolute;width:66px;height:66px;transform:translate(-50%,-50%);display:flex;align-items:center;justify-content:center;transition:.55s cubic-bezier(.2,.8,.2,1)}
.demo-node::before{content:"";position:absolute;width:6px;height:6px;border:1px solid #aaa;background:#fff;transform:rotate(45deg);transition:.55s}
.demo-node i{z-index:1;opacity:0;color:#fff;font-size:18px;font-style:normal;transition:.55s}
.demo-node span{position:absolute;top:55px;opacity:0;color:var(--ink);font-size:9px;white-space:nowrap;transition:.55s}
.demo-node.lit{animation:nodePulse 3s var(--delay) infinite}
.demo-node.lit::before{width:50px;height:50px;background:var(--ink);border-color:var(--ink);clip-path:polygon(50% 0,61% 34%,98% 35%,68% 57%,79% 94%,50% 72%,21% 94%,32% 57%,2% 35%,39% 34%);transform:rotate(var(--rotate))}
.demo-node.lit i,.demo-node.lit span{opacity:1}
.map-caption{margin:20px 0 0;text-align:right;color:var(--muted);font-size:10px}
.map-caption span{display:inline-block;width:32px;margin-right:8px;border-top:1px solid var(--ink);vertical-align:middle}
.demo-result{position:fixed;inset:0;z-index:10;display:grid;place-items:center;padding:58px 20px 22px;overflow:auto;background:rgba(255,255,255,.84);backdrop-filter:blur(2px)}
.demo-result[hidden],.demo-result article[hidden]{display:none}
.result-close{position:fixed;top:20px;right:22px;border:0;background:none;color:var(--muted);font-size:12px}
.admit-sheet,.reject-sheet{position:relative;width:min(100%,390px);min-height:510px;padding:28px;border:1px solid var(--ink);background:#fff;animation:sheetIn .6s cubic-bezier(.2,.8,.2,1)}
.sheet-index{padding-bottom:18px;border-bottom:1px solid var(--line);font-size:11px;color:var(--muted)}
.sheet-star{width:92px;height:92px;margin:38px auto 25px;display:grid;place-items:center;background:var(--accent);color:#fff;font-size:38px;clip-path:polygon(50% 0,61% 34%,98% 35%,68% 57%,79% 94%,50% 72%,21% 94%,32% 57%,2% 35%,39% 34%);animation:starTurn 8s linear infinite}
.admit-sheet>p{margin:0;text-align:center;color:var(--muted);font-size:11px}
.admit-sheet h2,.reject-sheet h2{margin:10px 0;text-align:center;font-size:34px;font-weight:500;line-height:1.2;letter-spacing:-.035em}
.admit-sheet h2 span{color:var(--accent)}
blockquote{margin:18px 0;padding:13px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:11px;line-height:1.7;text-align:center}
.share-invite{width:100%;height:42px;margin-top:2px;padding:0 15px;border:1px solid var(--ink);background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:space-between;font-size:12px}
.share-invite i{font-size:17px;font-style:normal}.share-invite:disabled{opacity:.55}
.sheet-footer{position:absolute;left:30px;right:30px;bottom:26px;display:flex;justify-content:space-between;font-size:11px;font-weight:600}
.sheet-footer small{color:var(--muted);font-size:9px;font-weight:400}
.timer{text-align:right}
.timer b{font-size:20px}
.reject-sheet{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}
.empty-star{font-size:88px;line-height:1}
.reject-sheet p{max-width:300px;color:var(--muted);font-size:13px;line-height:1.8}
.reject-sheet button{margin-top:26px;padding:7px 0;border:0;border-bottom:1px solid var(--ink);background:none;font-size:13px}
.share-guide{position:fixed;inset:0;z-index:40;padding:58px 20px 24px;background:rgba(255,255,255,.97);display:grid;place-items:center;overflow:auto}
.share-guide[hidden]{display:none}.share-guide-close{position:fixed;top:18px;right:22px;border:0;background:none;color:var(--muted);font-size:22px}
.share-guide-card{width:min(100%,380px);text-align:center}.share-guide-card>p:first-child{margin:0 0 12px;color:var(--muted);font-size:11px}
.share-guide-card img{display:block;width:min(100%,280px);max-height:56vh;margin:auto;border:1px solid var(--ink);object-fit:contain;background:#fff;box-shadow:8px 8px 0 var(--soft)}
.share-guide-card h2{margin:22px 0 7px;font-size:22px;font-weight:500}.share-guide-card h2+p{margin:0;color:var(--muted);font-size:12px;line-height:1.7}
.share-guide-card a{display:block;width:min(100%,280px);margin:18px auto 0;padding:12px;border:1px solid var(--ink);background:var(--ink);color:#fff;text-decoration:none;font-size:12px}
.demo-toast{position:fixed;left:50%;bottom:24px;z-index:30;padding:10px 16px;background:var(--ink);color:#fff;font-size:11px;opacity:0;transform:translate(-50%,18px);transition:.3s}
.demo-toast.show{opacity:1;transform:translate(-50%,0)}
@keyframes demoBob{50%{transform:translateY(5px)}}
@keyframes nodePulse{50%{filter:drop-shadow(0 0 7px rgba(200,66,54,.32));transform:translate(-50%,-54%)}}
@keyframes sheetIn{from{opacity:0;transform:translateY(20px)}}
@keyframes starTurn{to{transform:rotate(360deg)}}
@media(max-width:600px){
  .demo-header{height:58px;padding:0 18px}.version{font-size:10px}
  main{padding-top:58px;display:block}.demo-hero{min-height:auto;padding:70px 22px 55px;border-right:0;border-bottom:1px solid var(--ink)}.demo-hero::before{left:22px;height:30px}
  h1{font-size:42px}.overline{margin-bottom:16px}.intro{margin:16px 0 30px}
  .demo-map-section{min-height:auto;padding:42px 14px 30px}.map-title{align-items:start}.map-title h2{font-size:28px}.count b{font-size:30px}.count small{display:block;max-width:60px}
  .demo-map{height:660px;background-size:14.285% 10%}.demo-node{width:42px;height:42px}.demo-node.lit::before{width:32px;height:32px}.demo-node i{font-size:13px}.demo-node span{top:36px;font-size:7px}.map-caption{margin-top:14px}
  .admit-sheet,.reject-sheet{min-height:500px;padding:24px}.sheet-footer{left:24px;right:24px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}