:root {
  font-family: Inter, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #24364b;
  background: #f5f7fa;
  font-synthesis: none;
  letter-spacing: 0;
  font-size: 14px;
  --ink: #24364b;
  --muted: #6c7c90;
  --line: #dce4ed;
  --blue: #165dff;
  --blue-deep: #0e47c7;
  --blue-soft: #eaf1ff;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; background: #f5f7fa; }
button, a, select { -webkit-tap-highlight-color: transparent; }
button, select { font: inherit; }
button { cursor: pointer; }
button:focus-visible, a:focus-visible, select:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }
button:disabled { cursor: wait; opacity: .48; }
[hidden] { display: none !important; }
svg { width: 18px; height: 18px; flex-shrink: 0; }

.header {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(28px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid #e4e9ef;
  background: #fff;
}
.brand { display: flex; align-items: center; gap: 9px; color: #203144; text-decoration: none; }
.brand img { width: 30px; height: 30px; object-fit: contain; }
.brand strong { font-size: 22px; letter-spacing: -.2px; }
.brand > span { margin-left: 9px; padding-left: 16px; border-left: 1px solid #dce1e7; color: #78818c; font-size: 13px; }
.prototype { color: #718197; font-size: 12px; }

main { max-width: 1180px; margin: 0 auto; padding: 52px 28px 38px; }
.lab-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  align-items: center;
  gap: 64px;
  min-height: 270px;
  padding: 36px 42px;
  border: 1px solid #dfe7f0;
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}
.eyebrow, .section-kicker { margin: 0; color: #5d78a3; font-size: 11px; font-weight: 700; letter-spacing: .14em; }
.lab-hero h1 { max-width: 580px; margin: 15px 0 16px; color: #1e3045; font-size: clamp(30px, 4vw, 46px); font-weight: 700; line-height: 1.16; letter-spacing: -.8px; }
.lab-hero__lead { max-width: 560px; margin: 0; color: #64758a; font-size: 16px; line-height: 1.8; }
.lab-hero__status { display: flex; align-items: center; gap: 9px; margin-top: 25px; color: #728298; font-size: 12px; }
.lab-hero__status strong { color: #2d5f9d; font-weight: 600; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #2ca975; box-shadow: 0 0 0 4px #e5f5ee; }
.status-separator { width: 1px; height: 14px; margin: 0 3px; background: #d7e0ea; }

.lab-hero__visual { position: relative; height: 196px; border-left: 1px solid #d9e4f2; background: #f8fbff; overflow: hidden; }
.visual-axis { position: absolute; background: #b9cce8; opacity: .8; }
.visual-axis--x { right: 22px; bottom: 34px; left: 20px; height: 1px; }
.visual-axis--y { top: 19px; right: 74px; bottom: 24px; width: 1px; }
.visual-piece { position: absolute; width: 118px; height: 82px; border: 1px solid #a7c1e4; background: #eaf2ff; transform: rotate(-12deg) skewY(5deg); box-shadow: 12px 16px 0 #d9e5f5; }
.visual-piece--back { top: 52px; left: 62px; opacity: .45; transform: rotate(-12deg) skewY(5deg) translate(-23px, 13px); }
.visual-piece--mid { top: 52px; left: 62px; opacity: .7; transform: rotate(-12deg) skewY(5deg) translate(12px, -4px); }
.visual-piece--front { top: 52px; left: 62px; background: #d9e8ff; transform: rotate(-12deg) skewY(5deg) translate(42px, -21px); animation: piece-float 3.8s ease-in-out infinite; }
.visual-piece--front span { position: absolute; right: 17px; bottom: 15px; width: 18px; height: 18px; border: 2px solid #165dff; border-radius: 50%; }
.visual-piece--front span::after { position: absolute; top: 7px; left: 14px; width: 27px; height: 2px; background: #165dff; content: ""; transform: rotate(-28deg); transform-origin: left center; }
.visual-readout { position: absolute; right: 24px; bottom: 23px; display: flex; flex-direction: column; gap: 3px; color: #7890af; font-size: 10px; letter-spacing: .12em; }
.visual-readout strong { color: #165dff; font-size: 18px; letter-spacing: 0; }
@keyframes piece-float { 0%, 100% { transform: rotate(-12deg) skewY(5deg) translate(42px, -21px); } 50% { transform: rotate(-12deg) skewY(5deg) translate(50px, -27px); } }

.lab-workspace { display: grid; grid-template-columns: 286px minmax(0, 1fr); gap: 68px; margin-top: 46px; padding-top: 34px; border-top: 1px solid var(--line); }
.lab-control { padding-right: 36px; border-right: 1px solid var(--line); }
.lab-control h2, .lab-explain h2 { margin: 10px 0 12px; color: #1f334a; font-size: 22px; line-height: 1.35; }
.lab-control__intro, .lab-explain__heading > p:last-child { margin: 0; color: var(--muted); line-height: 1.8; }
.setting-row { display: flex; flex-direction: column; gap: 9px; margin-top: 27px; }
.setting-row label { color: #607188; font-size: 12px; }
select { width: 100%; min-height: 42px; padding: 0 12px; border: 1px solid #cfd9e5; border-radius: 5px; background: #fff; color: #2d4057; }
.launch { display: flex; align-items: center; justify-content: center; gap: 9px; width: 100%; min-height: 46px; margin-top: 18px; padding: 0 16px; border: 1px solid var(--blue); border-radius: 5px; background: var(--blue); color: #fff; font-weight: 600; transition: background .15s, border-color .15s, transform .15s; }
.launch:hover { border-color: var(--blue-deep); background: var(--blue-deep); transform: translateY(-1px); }
.launch svg:last-child { width: 16px; margin-left: auto; }
.session-result { min-height: 18px; margin: 14px 0 13px; color: #7a899a; font-size: 12px; }
.session-result.passed { color: #277354; }
.text-action { display: inline-flex; align-items: center; gap: 7px; min-height: 30px; padding: 0; border: 0; background: transparent; color: #356bb9; font-size: 12px; }
.text-action:hover { color: var(--blue); }
.text-action svg { width: 16px; }
.control-note { display: flex; align-items: flex-start; gap: 8px; margin: 28px 0 0; padding-top: 17px; border-top: 1px solid #e5ebf2; color: #8a98a8; font-size: 11px; line-height: 1.65; }
.control-note svg { width: 15px; color: #4c86c9; }

.lab-explain { min-width: 0; }
.lab-explain__heading { max-width: 660px; }
.lab-explain__heading h2 { font-size: 27px; letter-spacing: -.3px; }
.process-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin: 36px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.process-list li { min-height: 158px; padding: 22px 22px 14px 0; border-right: 1px solid var(--line); }
.process-list li + li { padding-left: 22px; }
.process-list li:last-child { border-right: 0; }
.process-no { display: block; margin-bottom: 20px; color: #5d87bf; font-size: 11px; font-weight: 700; letter-spacing: .12em; }
.process-list strong { color: #2d4057; font-size: 14px; }
.process-list p { margin: 9px 0 0; color: #7b899a; font-size: 12px; line-height: 1.7; }
.lab-specs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
.lab-specs div { display: flex; flex-direction: column; gap: 7px; }
.lab-specs span { color: #8b98a8; font-size: 11px; }
.lab-specs strong { color: #3b526b; font-size: 12px; font-weight: 600; }
.page-footer { display: flex; justify-content: space-between; gap: 20px; margin-top: 44px; padding-top: 19px; border-top: 1px solid #dde5ee; color: #8794a3; font-size: 11px; }

.modal-mask { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; overflow: auto; padding: 16px; background: rgba(30, 48, 75, .32); backdrop-filter: blur(4px); }
.verify-dialog { width: 340px; max-width: 100%; flex-shrink: 0; border: 1px solid #e1e7ef; border-top: 4px solid var(--blue); border-radius: 6px; outline: 0; background: #fff; box-shadow: 0 18px 48px rgba(27, 41, 65, .18); animation: appear .18s ease-out; }
.dialog-body { padding: 20px 20px 0; }
.dialog-body > h2 { margin: 0 0 14px; color: #334155; font-size: 15px; font-weight: 500; line-height: 24px; text-align: center; }
.stage { position: relative; width: 100%; height: 200px; overflow: hidden; border: 1px solid #e2e7ef; border-radius: 7px; outline: none; background: #f1f4f8; cursor: grab; touch-action: none; }
.stage:focus-visible { outline: 2px solid #b0c5ec; outline-offset: 2px; }
.stage.dragging { cursor: grabbing; }
.stage.is-complete { cursor: default; }
.stage canvas { display: block; width: 100%; height: 100%; }
.scene-label { position: absolute; top: 9px; left: 10px; color: #7d899b; font-size: 10px; pointer-events: none; }
.loader, .fallback { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; gap: 9px; color: #76869b; font-size: 12px; background: #f1f4f8; }
.loader > span { width: 15px; height: 15px; border: 2px solid #d9e4f4; border-top-color: #326be1; border-radius: 50%; animation: spin .8s linear infinite; }
.fallback { flex-direction: column; }
.fallback button { padding: 7px 12px; border: 1px solid #c9d4e4; border-radius: 4px; background: #fff; color: #306ac1; }
.dialog-footer { display: flex; align-items: center; justify-content: space-between; height: 46px; padding: 0 14px 5px; }
.dialog-tools { display: flex; gap: 0; }
.icon-button { display: grid; place-items: center; width: 40px; height: 40px; padding: 0; border: 0; border-radius: 6px; background: transparent; color: #82909c; }
.icon-button:hover { background: #f1f4f9; color: var(--blue); }
.icon-button svg { width: 20px; height: 20px; stroke-width: 1.7; }
.dialog-brand { display: flex; align-items: center; gap: 6px; padding-right: 6px; color: #83909e; font-size: 10px; }
.dialog-brand img { width: 17px; height: 17px; object-fit: contain; opacity: .75; }
.dialog-brand strong { font-weight: 600; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes appear { from { opacity: 0; transform: translateY(8px) scale(.98); } to { opacity: 1; transform: none; } }

@media (max-width: 860px) {
  .lab-hero { grid-template-columns: minmax(0, 1fr) 300px; gap: 34px; padding: 30px; }
  .lab-workspace { grid-template-columns: 235px minmax(0, 1fr); gap: 36px; }
  .lab-control { padding-right: 25px; }
  .lab-explain__heading h2 { font-size: 23px; }
  .process-list { display: block; }
  .process-list li, .process-list li + li { min-height: 0; padding: 18px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .process-list li:last-child { border-bottom: 0; }
  .process-no { display: inline-block; width: 42px; margin: 0 14px 0 0; vertical-align: top; }
  .process-list li > div { display: inline-block; max-width: calc(100% - 62px); vertical-align: top; }
}

@media (max-width: 620px) {
  .header { height: 65px; padding: 0 20px; }
  .brand strong { font-size: 20px; }
  .brand > span { padding-left: 10px; margin-left: 3px; font-size: 12px; }
  .prototype { display: none; }
  main { padding: 26px 20px 28px; }
  .lab-hero { display: block; min-height: 0; padding: 25px 22px 0; }
  .lab-hero h1 { margin-top: 13px; font-size: 31px; }
  .lab-hero__lead { font-size: 14px; line-height: 1.7; }
  .lab-hero__status { flex-wrap: wrap; margin: 19px 0 25px; }
  .lab-hero__visual { height: 145px; margin: 0 -22px; border-top: 1px solid #d9e4f2; border-left: 0; }
  .visual-piece { width: 96px; height: 66px; }
  .visual-piece--back, .visual-piece--mid, .visual-piece--front { top: 38px; left: 43px; }
  .visual-piece--back { transform: rotate(-12deg) skewY(5deg) translate(-19px, 10px); }
  .visual-piece--mid { transform: rotate(-12deg) skewY(5deg) translate(9px, -3px); }
  .visual-piece--front { transform: rotate(-12deg) skewY(5deg) translate(34px, -17px); }
  .visual-readout { right: 16px; bottom: 17px; }
  .lab-workspace { display: block; margin-top: 30px; padding-top: 0; border-top: 0; }
  .lab-control { padding: 0 0 28px; border-right: 0; border-bottom: 1px solid var(--line); }
  .lab-explain { padding-top: 30px; }
  .lab-explain__heading h2 { font-size: 22px; }
  .lab-specs { grid-template-columns: 1fr; gap: 14px; }
  .page-footer { flex-direction: column; gap: 7px; margin-top: 30px; }
  .modal-mask { padding: 12px; }
  .stage { height: auto; aspect-ratio: 1.49; }
  .dialog-body { padding: 18px 19px 0; }
  .dialog-body > h2 { margin-bottom: 10px; font-size: 14px; }
}

@media (max-height: 450px) {
  .modal-mask { align-items: flex-start; }
  .verify-dialog { margin: auto; }
  .stage { height: 148px; aspect-ratio: auto; }
  .dialog-body { padding-top: 10px; }
  .dialog-body > h2 { margin-bottom: 8px; }
  .slide-rail { margin-top: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}