/* B「交互实验室」— a dotted 3D "N." specimen on a lab plate.
   Layout and static looks apply in both states; anything that moves is scoped to [data-motion=on]. */

/* ---- Hero layout: text column + specimen plate ---- */
.b-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(340px,452px);grid-template-areas:"eyebrow stage" "title stage" "bottom stage" "foot foot";grid-template-rows:auto auto 1fr auto;column-gap:clamp(36px,5vw,80px);min-height:0;padding-top:28px}
.b-hero .hero-eyebrow{grid-area:eyebrow;align-self:end}
.b-hero h1{grid-area:title;font-size:clamp(62px,7.3vw,112px);margin:22px 0 34px}
.b-hero .hero-bottom{grid-area:bottom;align-self:start}
.b-hero .hero-signature{display:none}
.b-hero .n-stage{grid-area:stage;align-self:center}
.b-hero .hero-footnote{grid-area:foot;margin-top:40px}

/* The yellow period is a real button that toggles idea mode */
.idea-dot{position:relative;display:inline-block;border:0;padding:0;margin:0;background:none;font:inherit;letter-spacing:inherit;line-height:inherit;color:var(--accent);text-shadow:.04em .04em 0 var(--ink);cursor:pointer;vertical-align:baseline}
.idea-dot::after{content:'';position:absolute;left:-.12em;right:-.22em;top:.35em;bottom:-.05em}
.idea-dot::before{content:'';position:absolute;left:var(--dot-x,.13em);top:var(--dot-y,.83em);width:.36em;height:.36em;margin:-.18em 0 0 -.18em;border-radius:50%;border:2px solid var(--ink);opacity:0;pointer-events:none}
.idea-dot[aria-pressed=true]{color:var(--ink);text-shadow:.04em .04em 0 var(--accent),0 0 .3em #ffda55}
.idea-dot:focus-visible{outline-offset:2px}
[data-motion=on] .idea-dot{transition:color .3s,text-shadow .3s,scale .25s cubic-bezier(.34,1.8,.5,1)}
[data-motion=on] .idea-dot:not([aria-pressed=true])::before{animation:b-ping 2.8s cubic-bezier(.2,.7,.3,1) 1.8s infinite}
[data-motion=on] .b-paused .idea-dot::before{animation-play-state:paused}
[data-motion=on] .idea-dot:active{scale:.8}
@keyframes b-ping{0%{opacity:.9;scale:.6}70%,100%{opacity:0;scale:2.4}}

/* ---- Specimen plate ---- */
.n-stage{position:relative;width:100%}
.n-field{position:relative;aspect-ratio:1;border:1px solid #cfd5cb;border-radius:20px;overflow:hidden;background:
  radial-gradient(circle at 50% 46%,#fffffff2 0,#ffffff00 64%),
  radial-gradient(circle,#b9c1b3 1px,transparent 1.4px) 0 0/24px 24px,
  #f3f5f1;box-shadow:inset 0 0 0 6px #f9faf8,0 30px 60px -40px #17191840}
.n-field::before,.n-field::after{content:'';position:absolute;left:50%;top:50%;pointer-events:none;background:#17191822}
.n-field::before{width:1px;height:calc(100% - 64px);translate:0 -50%}
.n-field::after{height:1px;width:calc(100% - 64px);translate:-50% 0}
.n-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:pan-y;cursor:grab;z-index:1}
.n-canvas:active{cursor:grabbing}
.n-fallback{position:absolute;left:50%;top:50%;width:58%;translate:-50% -50%;fill:var(--ink)}
.n-fallback circle{fill:var(--accent);stroke:var(--ink);stroke-width:2}
.n-stage.has-canvas .n-fallback{display:none}
.n-mark{position:absolute;z-index:2;font-family:var(--display);font-size:11px;font-weight:600;letter-spacing:1.2px;color:#6d7468;pointer-events:none;font-variant-numeric:tabular-nums}
.n-mark b{font-weight:800;color:var(--ink)}
.n-mark-tl{left:18px;top:16px}.n-mark-tr{right:18px;top:16px}.n-mark-bl{left:18px;bottom:14px}.n-mark-br{right:18px;bottom:14px}
.b-idea .n-mode{color:#9a7a00}

/* Category entries appear where the particles gather */
.n-cats{position:absolute;inset:0;z-index:3;pointer-events:none}
.n-cat{position:absolute;left:var(--cx);top:var(--cy);translate:-50% -50%;pointer-events:auto;display:flex;flex-direction:column;align-items:center;gap:1px;min-width:104px;padding:9px 12px 10px;border-radius:14px;background:#fffffff0;border:1.5px solid var(--ink);box-shadow:3px 3px 0 var(--ink);text-align:center;line-height:1.3}
.n-cat-num{font-family:var(--display);font-size:22px;font-weight:800;letter-spacing:-.04em}
.n-cat-name{font-size:13px;font-weight:600;white-space:nowrap}
.n-cat.is-empty{border-style:dashed;box-shadow:none;background:#f9faf8e6;color:#5f665b}
.n-cat.is-empty .n-cat-name::after{content:' · 筹备中';font-weight:400;color:var(--muted)}
.n-cat.is-current{background:var(--accent)}
.n-cat:focus-visible{outline-offset:3px}
@media(hover:hover){.n-cat:hover{background:var(--accent);translate:-50% calc(-50% - 2px);box-shadow:4px 5px 0 var(--ink)}}
.n-cat:active{translate:-50% calc(-50% + 1px);box-shadow:1px 1px 0 var(--ink)}
[data-motion=on] .n-cat{transition:translate .2s,box-shadow .2s,background .2s}
[data-motion=on] .n-cats:not([hidden]) .n-cat{animation:b-pop .55s cubic-bezier(.34,1.6,.5,1) calc(420ms + var(--k) * 70ms) backwards}
@keyframes b-pop{from{opacity:0;scale:.6}}

/* Controls */
.n-controls{display:flex;align-items:center;flex-wrap:wrap;gap:10px 12px;margin-top:14px}
.n-btn{display:inline-flex;align-items:center;gap:10px;min-height:44px;border-radius:99px;border:1.5px solid var(--ink);background:var(--ink);color:var(--bg);padding:0 18px;font-size:14px;font-weight:500}
.n-btn:hover{background:#353d32}
.n-btn-icon{position:relative;width:14px;height:14px;flex:none}
.n-btn-icon::before,.n-btn-icon::after{content:'';position:absolute;inset:0;border:2px solid var(--accent);border-radius:3px}
.n-btn-icon::after{inset:4px;background:var(--accent);border-radius:50%}
.n-expand[aria-expanded=true]{background:var(--accent);color:var(--ink)}
.n-expand[aria-expanded=true] .n-btn-icon::before{border-color:var(--ink);border-radius:50%}
.n-expand[aria-expanded=true] .n-btn-icon::after{background:var(--ink)}
.n-rotate{width:44px;padding:0;justify-content:center;background:transparent;color:var(--ink);font-size:20px}
.n-rotate:hover{background:#17191810}
.n-hint{font-size:12px;color:var(--muted);letter-spacing:.3px}
[data-motion=on] .n-btn{transition:background .2s,color .2s,scale .2s}
[data-motion=on] .n-btn:active{scale:.95}
[data-motion=on] .n-rotate.is-spinning span{display:inline-block;animation:b-spin .7s cubic-bezier(.16,1,.3,1)}
@keyframes b-spin{to{rotate:90deg}}

/* Idea mode card */
.n-idea{margin-top:14px;padding:16px 18px 14px;border-radius:14px;background:var(--ink);color:var(--bg);position:relative}
.n-idea-label{font-family:var(--display);font-size:11px;font-weight:700;letter-spacing:1.6px;color:var(--accent)}
.n-idea-text{margin:6px 0 10px;font-size:17px;line-height:1.65}
.n-idea-next{border:0;background:transparent;color:var(--accent);padding:6px 0;font-size:14px}
.n-idea-next:focus-visible{outline-color:var(--accent)}
[data-motion=on] .n-idea:not([hidden]){animation:b-rise .5s cubic-bezier(.16,1,.3,1)}
[data-motion=on] .n-idea-text.is-new{animation:b-rise .45s cubic-bezier(.16,1,.3,1)}
@keyframes b-rise{from{opacity:0;transform:translateY(10px)}}
.page-grid{transition:opacity .6s}
.b-idea .page-grid{background-image:linear-gradient(to right,#ffda5588 1px,transparent 1px),linear-gradient(to bottom,#ffda5588 1px,transparent 1px)}
.b-idea .n-field{border-color:var(--ink)}

/* ---- Cards: tilt + pointer sheen ---- */
.project-card{position:relative}
.b-sheen::after{content:'';position:absolute;inset:0;z-index:2;border-radius:inherit;pointer-events:none;opacity:0;background:
  radial-gradient(520px circle at var(--mx,50%) var(--my,0%),#ffffff80,#ffffff00 42%),
  radial-gradient(260px circle at var(--mx,50%) var(--my,0%),#ffda5530,#ffda5500 70%)}
[data-motion=on] .b-sheen{transform:perspective(1000px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));transition:transform .6s cubic-bezier(.16,1,.3,1),box-shadow .4s}
[data-motion=on] .b-sheen::after{transition:opacity .35s}
[data-motion=on] .b-sheen.is-lit{transition:transform .14s linear,box-shadow .4s;box-shadow:0 24px 40px -26px #17191866}
[data-motion=on] .b-sheen.is-lit::after{opacity:1}
[data-motion=on] .b-sheen.is-pressed{transition:transform .2s cubic-bezier(.16,1,.3,1)}

/* ---- Reveal ---- */
[data-motion=on] .b-rv{opacity:0;translate:0 24px;transition:opacity .6s ease var(--d,0ms),translate .8s cubic-bezier(.16,1,.3,1) var(--d,0ms)}
[data-motion=on] .b-rv.is-in{opacity:1;translate:0 0}
[data-motion=on] .tab-panel.b-enter{animation:b-rise .5s cubic-bezier(.16,1,.3,1)}
[data-motion=on] .story-dialog[open]{animation:b-dialog .5s cubic-bezier(.16,1,.3,1)}
[data-motion=on] .story-dialog[open]::backdrop{animation:b-fade .35s ease}
@keyframes b-dialog{from{opacity:0;transform:perspective(1000px) rotateX(8deg) translateY(30px) scale(.97)}}
@keyframes b-fade{from{opacity:0}}
[data-motion=on] .work-filters button{transition:scale .2s,background .2s,color .2s,border-color .2s}
[data-motion=on] .work-filters button:active{scale:.95}

/* ---- Responsive ---- */
@media(max-width:1100px){.b-hero{grid-template-columns:minmax(0,1fr) minmax(300px,380px);column-gap:36px}.b-hero h1{font-size:clamp(56px,7vw,80px)}}
@media(max-width:900px){
  .b-hero{grid-template-columns:minmax(0,1fr);grid-template-areas:"eyebrow" "title" "bottom" "stage" "foot";grid-template-rows:none}
  .b-hero h1{font-size:clamp(54px,11vw,96px)}
  .b-hero .n-stage{max-width:520px;margin-top:40px}
}
@media(max-width:760px){
  .b-hero{padding-top:24px}
  .b-hero h1{font-size:clamp(50px,15.2vw,82px);margin:24px 0 26px}
  .b-hero .n-stage{margin-top:34px}
  .b-hero .hero-footnote{margin-top:34px}
  .n-field{border-radius:16px}
  .n-mark{font-size:10px;letter-spacing:.8px}
  .n-mark-tl,.n-mark-bl{left:14px}.n-mark-tr,.n-mark-br{right:14px}
  .n-cat{min-width:0;width:35%;padding:6px 6px 7px;border-radius:12px}
  .n-cat-num{font-size:19px}
  .n-cat-name{font-size:12px}
  .n-cat.is-empty .n-cat-name::after{content:none}
  .n-btn{padding:0 16px}
  .n-hint{flex-basis:100%}
}
/* Loops in the hero pause while the plate is off-screen. */
.b-paused .scroll-line,.b-paused .idea-dot::before{animation-play-state:paused!important}