/* Subpages (works.html, work/*.html) and the 问问档案 sheet. Same field, type and rules as the home page. */
.subpage{padding-bottom:0}
.subpage .topbar nav a,.ask-trigger{font-size:13px;font-weight:600;letter-spacing:.04em;padding:8px 0;white-space:nowrap}
.ask-trigger{color:var(--ink)}
.ask-trigger:hover,.subpage .topbar nav a:hover{color:var(--muted)}
.sig{display:block;width:100%;height:100%}
.wk-metric{display:grid;grid-template-columns:auto 1fr;align-items:baseline;column-gap:6px}
.wk-metric b{font:400 44px/1 var(--display);color:var(--project-color,var(--accent));font-variant-numeric:tabular-nums}
.wk-metric i{font-style:normal;font-size:15px;color:var(--muted)}
.wk-metric span{grid-column:1/-1;font-size:13px;color:var(--muted);margin-top:6px}
.wk-hint{font-size:13px;color:var(--faint)}

/* Index */
.wk-index-hero{position:relative;isolation:isolate;padding:40px 0 30px}
.wk-index-hero h1{font:400 clamp(72px,11vw,180px)/1 var(--display);margin:0}
.wk-index-hero sup{font-size:.24em;color:var(--accent);vertical-align:top;margin-left:10px}
.wk-filters{margin-top:28px}
.wk-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:64px 48px;padding:40px 0 120px}
.wk-card{display:grid;grid-template-columns:minmax(0,1fr);gap:18px;color:inherit;text-decoration:none}
.wk-card-sig{aspect-ratio:16/10;background:color-mix(in srgb,var(--project-color) 7%,transparent);transition:background .3s}
.wk-card:hover .wk-card-sig{background:color-mix(in srgb,var(--project-color) 14%,transparent)}
.wk-card-body{display:grid;grid-template-columns:auto 1fr;column-gap:16px;align-items:baseline}
.wk-no{font-size:13px;font-weight:600;color:var(--project-color)}
.wk-card h2{font:400 40px/1.1 var(--display);margin:0}
.wk-card-body>p{grid-column:2;font-size:15px;color:var(--muted);margin-top:8px}
.wk-card-body .wk-metric{margin-top:18px}
.wk-card:nth-child(4n+2),.wk-card:nth-child(4n+3){margin-top:80px}

/* Case page */
.wk-hero{position:relative;isolation:isolate;min-height:calc(100svh - 120px);padding-bottom:40px}
.wk-hero .shell{position:relative;min-height:calc(100svh - 160px);display:flex;flex-direction:column}
.wk-back{font-size:13px;font-weight:600;letter-spacing:.04em;margin-top:8px;align-self:flex-start}
.wk-kind{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--project-color);margin-top:40px}
.wk-hero h1{font:400 clamp(64px,9vw,170px)/.98 var(--display);margin:10px 0 0;max-width:62%}
.wk-sub{font-size:22px;line-height:1.5;margin-top:22px;max-width:520px}
.wk-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px 30px;margin-top:30px}
.wk-swarm{position:absolute;right:0;top:12%;width:44%;height:52%;cursor:pointer}
.wk-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px 32px;margin-top:auto;padding-top:56px}
.wk-scene{padding:120px 0 40px}
.wk-scene>p{font:400 clamp(26px,2.6vw,40px)/1.5 var(--display);max-width:1080px}
.wk-two{display:grid;grid-template-columns:1fr 1fr;gap:60px;margin-top:64px;max-width:1080px}
.wk-two h3,.wk-decisions h3,.wk-layer h3{font-size:22px;font-weight:700;line-height:1.4}
.wk-two h3{font-size:13px;color:var(--muted);letter-spacing:.08em}
.wk-two p{font-size:15px;margin-top:8px}
.wk-structure{position:relative;isolation:isolate;padding:120px 0}
.wk-structure-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:80px}
.wk-sticky{position:sticky;top:12vh;align-self:start;height:76vh;display:flex;flex-direction:column}
.wk-layer-no{font:400 120px/1 var(--display);color:var(--project-color)}
.wk-layer-part{font:400 32px/1.2 var(--display);margin:8px 0 24px}
.wk-sticky .sig{flex:1;min-height:0;opacity:.85}
.wk-sticky .wk-hint{margin-top:14px}
.wk-layers{display:flex;flex-direction:column;gap:22vh;padding:16vh 0 30vh}
.wk-layer{opacity:.28;transition:opacity .5s var(--ease)}
.wk-layer.is-on{opacity:1}
.wk-role{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--project-color)}
.wk-layer h3{font:400 36px/1.2 var(--display);margin:8px 0 12px}
.wk-layer>p{font-size:15px;color:var(--muted);max-width:560px}
.wk-layer ul{list-style:none;padding:0;margin:16px 0 0;display:flex;flex-wrap:wrap;gap:8px 22px}
.wk-layer li{font-size:13px;font-weight:600}
.wk-decisions{padding:120px 0 40px}
.wk-decisions h2,.wk-demo h2,.wk-proof h2{font:400 clamp(40px,4.4vw,72px)/1.1 var(--display);margin:0 0 40px}
.wk-decisions article{display:grid;grid-template-columns:120px minmax(0,1fr);gap:28px;padding:28px 0;max-width:1080px}
.wk-decisions article>span{font:400 64px/1 var(--display);color:var(--project-color)}
.wk-decisions p{font-size:15px;color:var(--muted);margin-top:8px}
.wk-demo{padding:100px 0 40px;max-width:900px}
.wk-demo .wk-hint{margin:-24px 0 30px}
.wk-figure{padding:60px 0}
.wk-figure img{width:100%;max-height:78vh;object-fit:contain;background:var(--panel);padding:24px}
.wk-figure figcaption{font-size:13px;color:var(--muted);margin-top:10px}
.wk-proof{position:relative;isolation:isolate;padding:120px 0}
.wk-outcome{font-size:22px;line-height:1.6;max-width:1000px}
.wk-note{font-size:13px;color:var(--muted);max-width:820px;margin-top:22px;padding-left:18px;position:relative}
.wk-note:before{content:"";position:absolute;left:0;top:8px;width:5px;height:5px;background:var(--project-color)}
.wk-stack{display:flex;flex-wrap:wrap;row-gap:6px;font-size:13px;font-weight:600;margin-top:34px}.wk-stack span+span:before{content:"·";color:var(--faint);margin:0 12px}
.wk-next{display:grid;grid-template-columns:1fr 1fr;gap:48px;padding:60px 0 100px}
.wk-next a{display:grid;grid-template-columns:120px 1fr;grid-template-rows:auto auto;column-gap:22px;align-items:end}
.wk-next .sig{grid-row:1/3;height:86px}
.wk-next span{font-size:13px;color:var(--muted)}
.wk-next b{font:400 32px/1.2 var(--display);color:var(--ink)}
.wk-next a:last-child{direction:rtl}.wk-next a:last-child>*{direction:ltr;text-align:right}
.wk-missing{padding:120px 0}.wk-missing h1{font:400 64px var(--display)}

/* Demo video */
.wk-video{padding:100px 0 20px}
.wk-video h2{font:400 clamp(40px,4.4vw,72px)/1.1 var(--display);margin:0 0 30px}
.wk-player{position:relative;aspect-ratio:16/9;max-width:1120px;border-radius:22px;overflow:hidden;cursor:pointer;isolation:isolate;
 background:var(--panel);box-shadow:0 0 0 1px color-mix(in srgb,var(--ink) 12%,transparent),0 1px 0 0 #ffffff80 inset,0 40px 80px -40px #2a20124d,0 12px 24px -16px #2a201233;
 transition:transform .5s var(--ease),box-shadow .5s var(--ease)}
.wk-player:hover{transform:translateY(-4px);box-shadow:0 0 0 1px color-mix(in srgb,var(--project-color) 45%,transparent),0 1px 0 0 #ffffff80 inset,0 50px 90px -40px #2a201266,0 16px 30px -18px #2a20124d}
.wk-player:focus-visible{outline:2px solid var(--project-color);outline-offset:6px}
.wk-frame{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:opacity .22s,transform 1.8s var(--ease);user-select:none}
.wk-player.is-fading .wk-frame{opacity:.25}
.wk-player:not(.is-scrubbing) .wk-frame{transform:scale(1.015)}
/* A soft light from the top edge and a darker floor, so the frame reads as a lit surface. */
.wk-sheen{position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(180deg,#ffffff38 0,#ffffff00 22%),linear-gradient(0deg,#0b0c0a8c 0,#0b0c0a00 38%);border-radius:inherit}
.wk-play{position:absolute;left:28px;bottom:34px;z-index:2;display:flex;align-items:center;gap:14px;color:#fff;pointer-events:none}
.wk-play i{display:grid;place-items:center;width:58px;height:58px;border-radius:50%;font-style:normal;font-size:18px;padding-left:4px;background:#ffffff2e;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:0 0 0 1px #ffffff66 inset;transition:transform .35s var(--ease),background .35s}
.wk-player:hover .wk-play i{transform:scale(1.08);background:var(--project-color)}
.wk-play b{font:400 26px/1 var(--display)}
.wk-play small{font-size:13px;opacity:.8;font-variant-numeric:tabular-nums}
.wk-scrub{position:absolute;left:28px;right:28px;bottom:18px;height:3px;border-radius:3px;z-index:2;background:#ffffff40;overflow:hidden}
.wk-scrub i{display:block;height:100%;width:0;background:#fff;border-radius:inherit;transition:width .25s var(--ease)}
.wk-time{position:absolute;right:28px;bottom:30px;z-index:2;color:#fff;font-size:13px;opacity:0;transition:opacity .25s}
.wk-player.is-scrubbing .wk-time{opacity:1}
.wk-player.is-playing{cursor:default;transform:none}
.wk-player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.wk-figure img{border-radius:18px;box-shadow:0 0 0 1px color-mix(in srgb,var(--ink) 10%,transparent),0 30px 60px -36px #2a20124d}
.wk-video .line-link{margin-top:12px}
.wk-game{aspect-ratio:11/6}
.wk-game .wk-frame{object-fit:cover;object-position:top}
.wk-game:fullscreen{border-radius:0;aspect-ratio:auto}
.wk-game-note{margin-top:14px}
.wk-game-section .wk-actions{margin-top:6px}

/* 问问档案: a sheet from the right; full screen on phones. */
.ask-dialog{position:fixed;inset:0 0 0 auto;margin:0;width:min(460px,100%);max-width:100%;height:100%;max-height:100%;padding:0;display:none;flex-direction:column;border:0;background:var(--bg);color:var(--ink);box-shadow:-30px 0 90px #1d18102e}
.ask-dialog[open]{display:flex;animation:ask-in .3s var(--ease)}
@keyframes ask-in{from{transform:translateX(24px);opacity:0}to{transform:none;opacity:1}}
.ask-head{display:flex;justify-content:space-between;align-items:center;padding:26px 28px 6px}
.ask-head h2{font:400 32px/1 var(--display);margin:0}
.ask-close{font-size:26px;width:40px;height:40px}
.ask-log{flex:1;overflow:auto;padding:12px 28px;display:flex;flex-direction:column;gap:24px}
.ask-hello{font-size:15px;color:var(--muted)}
.ask-q{font-size:15px;font-weight:700}
.ask-q:before{content:"";display:inline-block;width:5px;height:5px;background:var(--accent);margin:0 10px 3px 0}
.ask-a{font-size:15px;line-height:1.85;margin-top:6px}
.ask-src{display:grid;grid-template-columns:1fr auto;column-gap:12px;margin-top:10px;padding:10px 0;text-decoration:none;color:inherit;box-shadow:0 -1px var(--line)}
.ask-src b{font-size:13px}.ask-src span{grid-column:1;font-size:13px;color:var(--muted)}.ask-src i{grid-row:1/3;grid-column:2;font-style:normal;align-self:center}
.ask-src:hover b{color:var(--accent)}
.ask-quick{display:flex;flex-wrap:wrap;gap:6px 18px;padding:10px 28px}
.ask-quick button{font-size:13px;font-weight:600;color:var(--muted);padding:6px 0}
.ask-quick button:hover{color:var(--ink)}
.ask-form{display:flex;gap:12px;padding:10px 28px}
.ask-form input{flex:1;min-width:0;border:0;background:none;font-size:16px;padding:10px 0;box-shadow:0 1px var(--ink);outline:0}
.ask-foot{font-size:11px;color:var(--faint);padding:6px 28px calc(18px + env(safe-area-inset-bottom))}

@media(max-width:1150px){.wk-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.wk-structure-grid{gap:44px}}
@media(max-width:800px){
 .wk-grid{grid-template-columns:1fr;gap:56px}.wk-card:nth-child(n){margin-top:0}
 .wk-hero h1{max-width:100%;font-size:60px}.wk-swarm{position:relative;top:auto;width:100%;height:220px;margin-top:24px}
 .wk-sub{font-size:18px}.wk-scene,.wk-decisions,.wk-structure,.wk-proof{padding:80px 0 24px}
 .wk-two{grid-template-columns:1fr;gap:28px}
 .wk-structure-grid{grid-template-columns:1fr}.wk-sticky{position:sticky;top:0;height:auto;z-index:2;background:var(--bg);padding:12px 0;flex-direction:row;align-items:baseline;gap:16px}
 .wk-sticky .sig,.wk-sticky .wk-hint{display:none}.wk-layer-no{font-size:48px}.wk-layer-part{font-size:22px;margin:0}
 .wk-layers{gap:56px;padding:24px 0}.wk-layer{opacity:1}.wk-layer h3{font-size:28px}
 .wk-decisions article{grid-template-columns:56px 1fr;gap:16px}.wk-decisions article>span{font-size:40px}
 .wk-next{grid-template-columns:1fr;gap:28px}.wk-next a:last-child{direction:ltr}.wk-next a:last-child>*{text-align:left}
 .wk-next a{grid-template-columns:88px 1fr}.wk-next .sig{height:64px}.wk-next b{font-size:24px}
}
@media(max-width:560px){.wk-player{border-radius:16px}.wk-play{left:18px;bottom:28px}.wk-play i{width:46px;height:46px}.wk-play b{font-size:20px}.wk-scrub{left:18px;right:18px;bottom:14px}.wk-time{right:18px;bottom:24px}.wk-metric b{font-size:34px}.wk-metrics{gap:20px}.wk-index-hero h1{font-size:72px}.wk-card h2{font-size:30px}.ask-head,.ask-log,.ask-quick,.ask-form,.ask-foot{padding-inline:20px}}