/* =========================================================
   web04 互動實驗室樣式（接在 unit-digital.css 之後載入）
   所有 class 以 w4- 開頭，避免影響其他單元
   設計 token 由 JS 寫在 :root：--w4-pri / --w4-sec / --w4-acc / --w4-bg / --w4-text / --w4-r / --w4-font
   ========================================================= */
:root {
  --w4-pri: #0F2C59; --w4-sec: #2563EB; --w4-acc: #D97706; --w4-bg: #F8FAFC; --w4-text: #334155;
  --w4-r: 14px; --w4-font: "Noto Sans TC", sans-serif; --w4-head-font: "Noto Sans TC", sans-serif;
}

/* ---------- 共用小零件 ---------- */
.w4-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.w4-split { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 18px; align-items: start; }
.w4-split.even { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.w4-split.cp { grid-template-columns: minmax(0, 1fr) minmax(0, 1.9fr); }
.w4-split.rwd { grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); }
@media (max-width: 900px) { .w4-split, .w4-split.even, .w4-split.cp, .w4-split.rwd { grid-template-columns: minmax(0, 1fr); } }
.w4-mini { font-family: var(--dg-font-mono); font-size: 11.5px; color: var(--dg-ink-faint); }
.w4-kv { display: flex; flex-wrap: wrap; gap: 8px; }
.w4-kv > span { font-family: var(--dg-font-mono); font-size: 12px; padding: 6px 10px; border-radius: 8px; background: var(--dg-surface-2); border: 1px solid var(--dg-line); color: var(--dg-ink-soft); }
.w4-kv > span b { color: var(--dg-ink); font-size: 14px; margin-left: 4px; }
.w4-kv > span.hot { background: var(--dg-orange-soft); border-color: var(--dg-orange); }
.w4-kv > span.hot b { color: var(--dg-orange-strong); }
.w4-switch { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--dg-line); background: var(--dg-surface); cursor: pointer; transition: all .2s; }
.w4-switch + .w4-switch { margin-top: 8px; }
.w4-switch input { margin-top: 4px; accent-color: var(--dg-orange); width: 18px; height: 18px; flex: none; }
.w4-switch b { display: block; font-size: 14.5px; color: var(--dg-ink); }
.w4-switch small { display: block; font-size: 12.5px; line-height: 1.55; color: var(--dg-ink-soft); }
.w4-switch.on { border-color: var(--dg-teal); background: var(--dg-teal-soft); }
.w4-switch .k { font-family: var(--dg-font-mono); font-size: 10.5px; color: var(--dg-teal-strong); }
.w4-note { font-size: 13.5px; line-height: 1.7; padding: 10px 14px; border-radius: 10px; background: var(--dg-amber-soft); color: #6B4510; margin-top: 12px; }
.w4-note.ok { background: var(--dg-ok-soft); color: #0B5B41; }
.w4-pbody { white-space: pre-wrap; max-height: 380px; overflow: auto; font-size: 12.5px; line-height: 1.75; }
.w4-pbody::before { content: none; }
.w4-pbody::-webkit-scrollbar { width: 8px; }
.w4-pbody::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, .25); border-radius: 4px; }

/* ---------- 三概念地圖 ---------- */
.w4-pillars { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; position: relative; }
.w4-pillar { appearance: none; text-align: left; font: inherit; cursor: pointer; padding: 18px; border-radius: 16px; border: 1.5px solid var(--dg-line); background: var(--dg-surface); display: flex; flex-direction: column; gap: 6px; transition: all .25s var(--dg-ease); position: relative; }
.w4-pillar:hover { transform: translateY(-3px); box-shadow: var(--dg-shadow); }
.w4-pillar .no { font-family: var(--dg-font-display); font-size: 30px; font-weight: 700; color: transparent; -webkit-text-stroke: 1.2px var(--dg-orange); line-height: 1; }
.w4-pillar b { font-size: 18px; font-weight: 900; color: var(--dg-ink); }
.w4-pillar .q { font-size: 14px; color: var(--dg-ink-soft); line-height: 1.6; }
.w4-pillar .en { font-family: var(--dg-font-mono); font-size: 11px; color: var(--dg-teal-strong); }
.w4-pillar[aria-pressed="true"] { border-color: var(--dg-orange); background: var(--dg-orange-soft); box-shadow: 0 0 0 4px rgba(232, 98, 42, .1); }
.w4-pillar:not(:last-child)::after { content: "→"; position: absolute; right: -14px; top: 50%; transform: translateY(-50%); z-index: 2; width: 22px; height: 22px; border-radius: 50%; background: var(--dg-deep); color: #fff; display: grid; place-items: center; font-size: 12px; }
@media (max-width: 760px) { .w4-pillars { grid-template-columns: 1fr; } .w4-pillar:not(:last-child)::after { content: "↓"; right: auto; left: 50%; top: auto; bottom: -14px; transform: translateX(-50%); } }
.w4-pillar-detail { margin-top: 14px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
@media (max-width: 760px) { .w4-pillar-detail { grid-template-columns: 1fr; } }
.w4-pillar-detail > div { padding: 14px 16px; border-radius: 12px; background: var(--dg-surface); border: 1px solid var(--dg-line); font-size: 14px; color: var(--dg-ink-soft); line-height: 1.7; }
.w4-pillar-detail > div b { display: block; font-family: var(--dg-font-mono); font-size: 11px; color: var(--dg-teal-strong); margin-bottom: 2px; font-weight: 600; letter-spacing: .08em; }

/* ---------- 風格定位座標 ---------- */
.w4-pad { position: relative; aspect-ratio: 1 / 1; max-height: 340px; width: 100%; border-radius: 16px; border: 1px solid var(--dg-line-strong); background: linear-gradient(var(--dg-line) 1px, transparent 1px) 0 50% / 100% 100% no-repeat, linear-gradient(90deg, var(--dg-line) 1px, transparent 1px) 50% 0 / 100% 100% no-repeat, var(--dg-surface-2); touch-action: none; cursor: crosshair; user-select: none; }
.w4-pad .ax { position: absolute; font-family: var(--dg-font-mono); font-size: 11px; color: var(--dg-ink-faint); pointer-events: none; }
.w4-pad .ax.t { top: 6px; left: 50%; transform: translateX(-50%); }
.w4-pad .ax.b { bottom: 6px; left: 50%; transform: translateX(-50%); }
.w4-pad .ax.l { left: 8px; top: 50%; transform: translateY(-50%); }
.w4-pad .ax.r { right: 8px; top: 50%; transform: translateY(-50%); }
.w4-pad .dot { position: absolute; transform: translate(-50%, -50%); font-size: 11.5px; font-weight: 700; padding: 3px 8px; border-radius: 99px; background: #fff; border: 1px solid var(--dg-line-strong); color: var(--dg-ink-soft); pointer-events: none; white-space: nowrap; transition: all .25s; }
.w4-pad .dot.on { background: var(--dg-teal-strong); color: #fff; border-color: var(--dg-teal-strong); transform: translate(-50%, -50%) scale(1.08); }
.w4-pad .cross { position: absolute; width: 26px; height: 26px; border-radius: 50%; border: 3px solid var(--dg-orange); background: rgba(232, 98, 42, .18); transform: translate(-50%, -50%); pointer-events: none; box-shadow: 0 0 0 6px rgba(232, 98, 42, .12); }
.w4-pad .ring { position: absolute; border-radius: 50%; border: 1.5px dashed var(--dg-orange); transform: translate(-50%, -50%); pointer-events: none; opacity: .5; }

/* ---------- 情緒板延伸：迷你首頁 ---------- */
.w4-mini-home { --m1: #0F2C59; --m2: #0EA5B8; --m3: #F5EFE6; --m4: #E8622A; --mr: 14px; --mf: "Noto Sans TC", sans-serif; border-radius: 14px; overflow: hidden; border: 1px solid var(--dg-line-strong); background: var(--m3); font-family: var(--mf); transition: background .4s; }
.w4-mini-home .hd { background: var(--m1); color: #fff; padding: 10px 14px; display: flex; align-items: center; gap: 10px; font-weight: 900; font-size: 13px; }
.w4-mini-home .hd span { margin-left: auto; font-size: 11px; opacity: .85; display: flex; gap: 10px; }
.w4-mini-home .hero { padding: 18px 16px; display: grid; gap: 8px; }
.w4-mini-home .hero b { font-size: 22px; line-height: 1.2; color: var(--m1); font-weight: 900; }
.w4-mini-home .hero p { margin: 0; font-size: 12.5px; color: #475569; }
.w4-mini-home .hero i { display: inline-block; align-self: start; background: var(--m4); color: #fff; font-style: normal; font-weight: 800; font-size: 12px; padding: 8px 16px; border-radius: var(--mr); }
.w4-mini-home .cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 0 16px 16px; }
.w4-mini-home .cards div { background: #fff; border-radius: var(--mr); padding: 8px; font-size: 11px; font-weight: 700; color: var(--m1); }
.w4-mini-home .cards div::before { content: ""; display: block; height: 36px; border-radius: calc(var(--mr) * .6); background: linear-gradient(140deg, var(--m1), var(--m2)); margin-bottom: 6px; }

/* ---------- 趨勢：Bento 控制 ---------- */
.w4-bento-lab { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 74px; gap: var(--bg, 8px); }
.w4-bento-lab div { border-radius: var(--br, 10px); padding: 10px 12px; font-size: 13px; font-weight: 700; display: flex; flex-direction: column; justify-content: space-between; transition: transform .2s var(--dg-ease), border-radius .2s, gap .2s; }
.w4-bento-lab div:hover { transform: scale(1.04); }
.w4-bento-lab small { font-family: var(--dg-font-mono); font-size: 10.5px; font-weight: 500; opacity: .8; }
.w4-bento-lab .b1 { grid-column: span 2; grid-row: span 2; background: #0F2C59; color: #fff; }
.w4-bento-lab .b2 { background: var(--dg-teal-soft); color: var(--dg-teal-strong); }
.w4-bento-lab .b3 { background: #FF7A59; color: #2A0E05; }
.w4-bento-lab .b4 { grid-column: span 2; background: var(--dg-surface-3); color: var(--dg-ink); }
.w4-bento-lab .b5 { grid-column: span 2; background: var(--dg-amber-soft); color: #6B4510; }
.w4-bento-lab .b6 { grid-column: span 2; background: var(--dg-surface-2); color: var(--dg-ink); border: 1px solid var(--dg-line); }

/* ---------- Token 三層 ---------- */
.w4-chain { display: grid; grid-template-columns: minmax(0, .9fr) 28px minmax(0, 1fr) 28px minmax(0, 1.3fr); gap: 8px; align-items: start; }
.w4-chain .arrow { align-self: center; text-align: center; color: var(--dg-orange); font-size: 20px; font-weight: 900; }
.w4-chain .col > h6 { font-family: var(--dg-font-mono); font-size: 11px; font-weight: 600; letter-spacing: .08em; color: var(--dg-teal-strong); margin: 0 0 8px; }
.w4-chain .box { padding: 12px; border-radius: 12px; border: 1px solid var(--dg-line); background: var(--dg-surface); display: grid; gap: 8px; }
.w4-chain .box + .box { margin-top: 8px; }
.w4-chain input[type="color"] { width: 100%; height: 52px; border: 1px solid var(--dg-line-strong); border-radius: 10px; padding: 0; background: none; cursor: pointer; }
.w4-chain input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.w4-chain input[type="color"]::-webkit-color-swatch { border: 0; border-radius: 9px; }
.w4-chain .nm { font-family: var(--dg-font-mono); font-size: 12px; color: var(--dg-ink); font-weight: 600; word-break: break-all; }
.w4-chain .sw { height: 26px; border-radius: 8px; border: 1px solid rgba(0, 0, 0, .1); }
.w4-chain .use { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; }
.w4-chain .use .pv { display: flex; align-items: center; gap: 8px; font-size: 12.5px; font-weight: 700; color: var(--dg-ink); }
.w4-chain .use .pv i { width: 36px; height: 24px; border-radius: 6px; flex: none; border: 1px solid rgba(0, 0, 0, .1); }
.w4-chain .use .pv small { display: block; font-family: var(--dg-font-mono); font-weight: 500; color: var(--dg-ink-faint); font-size: 10.5px; }
.w4-chain .bind { appearance: none; font: inherit; font-size: 11.5px; font-weight: 700; padding: 4px 9px; border-radius: 99px; border: 1px solid var(--dg-teal); background: var(--dg-teal-soft); color: var(--dg-teal-strong); cursor: pointer; white-space: nowrap; }
.w4-chain .bind.hard { border-color: var(--dg-orange); background: var(--dg-orange-soft); color: var(--dg-orange-strong); }
.w4-chain .miss { font-size: 11.5px; color: var(--dg-bad); font-weight: 700; display: none; grid-column: 1 / -1; }
.w4-chain .use.stale .miss { display: block; }
@media (max-width: 760px) { .w4-chain { grid-template-columns: 1fr; } .w4-chain .arrow { transform: rotate(90deg); } }

/* ---------- 字級表 ---------- */
.w4-type-table { display: grid; gap: 0; }
.w4-type-row { display: grid; grid-template-columns: 150px 74px 74px minmax(0, 1fr); gap: 12px; align-items: center; padding: 12px 4px; border-bottom: 1px solid var(--dg-line); }
.w4-type-row:last-child { border: 0; }
.w4-type-row.head { font-family: var(--dg-font-mono); font-size: 11px; color: var(--dg-ink-faint); padding-bottom: 6px; }
.w4-type-row .nm b { display: block; font-size: 14px; color: var(--dg-ink); }
.w4-type-row .nm small { font-family: var(--dg-font-mono); font-size: 11px; color: var(--dg-ink-faint); }
.w4-type-row .px { font-family: var(--dg-font-display); font-weight: 700; font-size: 18px; color: var(--dg-ink); }
.w4-type-row .px.cur { color: var(--dg-orange-strong); }
.w4-type-row .sp { font-family: var(--w4-head-font); color: var(--w4-pri); overflow: hidden; }
@media (max-width: 680px) { .w4-type-row { grid-template-columns: 1fr 56px 56px; } .w4-type-row .sp { grid-column: 1 / -1; } }

/* ---------- 迷你網站（斷點 / 元件 / RWD 共用） ---------- */
.w4-stage { position: relative; overflow-x: hidden; overflow-y: auto; border-radius: 12px; background: repeating-linear-gradient(45deg, var(--dg-surface-3) 0 8px, var(--dg-surface-2) 8px 16px); max-height: var(--stage-h, 600px); border: 1px solid var(--dg-line-strong); }
.w4-sizer { position: relative; margin: 0 auto; }
.w4-vp { container-type: inline-size; container-name: vp; position: absolute; left: 0; top: 0; transform-origin: 0 0; background: var(--w4-bg); font-family: var(--w4-font); color: var(--w4-text); overflow: hidden; box-shadow: 0 0 0 1px rgba(0, 0, 0, .12); }
.w4-vp.measure { outline: 3px solid var(--dg-bad); outline-offset: -3px; }
.w4s { --pad: 16px; --gut: 12px; --sec: 28px; --cols: 4; position: relative; line-height: 1.6; font-size: 14px; }
.w4s * { box-sizing: border-box; }
.w4s .s-hd { display: flex; align-items: center; gap: 12px; padding: 10px var(--pad); background: var(--w4-pri); color: #fff; }
.w4s .s-logo { font-weight: 900; font-size: 15px; white-space: nowrap; font-family: var(--w4-head-font); }
.w4s .s-nav { display: none; gap: 6px; margin-left: auto; }
.w4s .s-nav a { color: #fff; font-weight: 700; font-size: 13px; padding: 6px 12px; border-radius: 99px; white-space: nowrap; text-decoration: none; }
.w4s .s-nav a.on { background: rgba(255, 255, 255, .2); }
.w4s .s-burger { margin-left: auto; appearance: none; border: 0; background: rgba(255, 255, 255, .16); color: #fff; font-size: 20px; width: 44px; height: 44px; border-radius: 10px; cursor: pointer; display: grid; place-items: center; }
.w4s .s-menu { display: none; background: var(--w4-pri); border-top: 1px solid rgba(255, 255, 255, .2); padding: 6px var(--pad) 12px; }
.w4s .s-menu a { display: block; color: #fff; padding: 12px 0; font-weight: 700; border-bottom: 1px solid rgba(255, 255, 255, .12); text-decoration: none; }
.w4s.menu-open .s-menu { display: block; }
.w4s .s-btn { display: inline-flex; align-items: center; justify-content: center; font-weight: 800; font-size: 14px; padding: 0 20px; border-radius: var(--w4-r); background: var(--w4-acc); color: #fff; white-space: nowrap; text-align: center; }
.w4s .s-hdcta { display: none; }
.w4s .tt { min-height: 44px; }
.w4s[data-touch="off"] .tt { min-height: 26px; padding-top: 2px; padding-bottom: 2px; }
.w4s[data-touch="off"] .s-burger { width: 28px; height: 28px; font-size: 14px; }
.w4s .s-hero { display: grid; grid-template-columns: 1fr; gap: var(--gut); padding: var(--sec) var(--pad); align-items: center; }
.w4s .s-kicker { font-family: var(--dg-font-mono); font-size: 11px; color: var(--w4-sec); font-weight: 600; letter-spacing: .08em; }
.w4s .s-hero h4 { font-family: var(--w4-head-font); font-size: 28px; line-height: 1.2; font-weight: 900; color: var(--w4-pri); margin: 4px 0 8px; }
.w4s .s-hero p { margin: 0; color: var(--w4-text); font-size: 14px; }
.w4s .s-hero-img { height: 150px; border-radius: var(--w4-r); background: linear-gradient(140deg, var(--w4-pri), var(--w4-sec)); display: grid; place-items: center; color: rgba(255, 255, 255, .8); font-family: var(--dg-font-mono); font-size: 11px; min-width: 0; }
.w4s .s-body { display: grid; grid-template-columns: 1fr; gap: var(--gut); padding: 0 var(--pad) var(--sec); }
.w4s .s-info h5 { font-family: var(--w4-head-font); font-size: 18px; color: var(--w4-pri); margin: 0 0 6px; font-weight: 800; }
.w4s .s-info p { margin: 0 0 8px; font-size: 13.5px; }
.w4s .s-book { background: #fff; border: 1px solid #E2E8F0; border-radius: var(--w4-r); padding: 14px; display: grid; gap: 4px; align-content: start; }
.w4s .s-book b { font-family: var(--dg-font-display); font-size: 22px; color: var(--w4-pri); }
.w4s .s-book small { color: #64748B; font-size: 12px; }
.w4s .s-book .s-btn { margin-top: 8px; }
.w4s .s-cards { display: grid; grid-template-columns: 1fr; gap: var(--gut); padding: 0 var(--pad) var(--sec); }
.w4s .s-card { background: #fff; border: 1px solid #E2E8F0; border-radius: var(--w4-r); padding: 10px; display: grid; gap: 4px; min-width: 0; }
.w4s .s-card .ph { height: 64px; border-radius: calc(var(--w4-r) * .6); background: linear-gradient(140deg, var(--w4-sec), var(--w4-pri)); opacity: .9; }
.w4s .s-card:nth-child(2) .ph { background: linear-gradient(140deg, var(--w4-acc), var(--w4-pri)); }
.w4s .s-card:nth-child(3) .ph { background: linear-gradient(140deg, var(--w4-pri), var(--w4-sec)); }
.w4s .s-card b { font-size: 14.5px; color: var(--w4-pri); white-space: nowrap; }
.w4s .s-card small { font-size: 12px; color: #64748B; white-space: nowrap; }
.w4s .s-tag { justify-self: start; font-size: 11px; font-weight: 800; padding: 1px 8px; border-radius: 99px; background: color-mix(in srgb, var(--w4-sec) 14%, #fff); color: var(--w4-pri); }
.w4s .s-ft { background: var(--w4-pri); color: #fff; padding: 18px var(--pad); display: grid; grid-template-columns: 1fr; gap: 0; }
.w4s .s-fg { border-bottom: 1px solid rgba(255, 255, 255, .15); }
.w4s .s-fh { appearance: none; border: 0; background: none; color: #fff; font: inherit; font-weight: 800; font-size: 13.5px; display: flex; justify-content: space-between; width: 100%; padding: 10px 0; text-align: left; cursor: pointer; }
.w4s .s-fl { font-size: 12.5px; color: rgba(255, 255, 255, .8); padding-bottom: 10px; display: none; }
.w4s .s-fg.open .s-fl { display: block; }
.w4s .s-ov { position: absolute; inset: 0; pointer-events: none; display: none; grid-template-columns: repeat(var(--cols), 1fr); gap: var(--gut); padding: 0 var(--pad); z-index: 5; }
.w4s .s-ov i { background: rgba(232, 98, 42, .16); border-left: 1px solid rgba(232, 98, 42, .35); border-right: 1px solid rgba(232, 98, 42, .35); }
.w4s[data-grid="on"] .s-ov { display: grid; }
.w4s .s-ov i:nth-child(n+5) { display: none; }
.w4s .tt.bad { outline: 3px solid var(--dg-bad); outline-offset: 2px; }

/* 手機（預設，< 768）已寫在上面；以下為平板、桌機 */
@container vp (min-width: 768px) {
  .w4s { --pad: 24px; --gut: 16px; --sec: 40px; --cols: 8; }
  .w4s .s-ov i:nth-child(n+5) { display: block; }
  .w4s .s-ov i:nth-child(n+9) { display: none; }
  .w4s[data-acc="on"] .s-nav { display: flex; }
  .w4s[data-acc="on"] .s-burger { display: none; }
  .w4s[data-acc="on"] .s-menu { display: none !important; }
  .w4s .s-hero { grid-template-columns: 1.2fr 1fr; }
  .w4s .s-hero h4 { font-size: 34px; }
  .w4s .s-hero-img { height: 190px; }
  .w4s .s-body { grid-template-columns: 5fr 3fr; }
  .w4s .s-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .w4s .s-card:nth-child(3) { grid-column: span 2; }
  .w4s[data-acc="on"] .s-fl { display: block; }
  .w4s[data-acc="on"] .s-fh { cursor: default; }
  .w4s[data-acc="on"] .s-fh span { display: none; }
  .w4s .s-ft { grid-template-columns: repeat(3, 1fr); gap: var(--gut); }
  .w4s .s-fg { border-bottom: 0; }
}
@container vp (min-width: 1200px) {
  .w4s { --pad: 40px; --gut: 24px; --sec: 64px; --cols: 12; }
  .w4s .s-ov i:nth-child(n+9) { display: block; }
  .w4s .s-hdcta { display: inline-flex; }
  .w4s .s-hero h4 { font-size: 44px; }
  .w4s .s-hero-img { height: 240px; }
  .w4s .s-body { grid-template-columns: 8fr 4fr; }
  .w4s .s-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .w4s .s-card:nth-child(3) { grid-column: auto; }
  .w4s .s-card .ph { height: 90px; }
}
/* 手機專屬：Reorder、滿版按鈕 */
@container vp (max-width: 767.98px) {
  .w4s[data-reorder="on"] .s-book { order: -1; }
  .w4s[data-reorder="on"] .s-book .s-btn { width: 100%; }
  .w4s[data-acc="on"] .s-fg .s-fl { display: none; }
  .w4s[data-acc="on"] .s-fg.open .s-fl { display: block; }
}
/* 策略關閉時的「壞掉」樣子 */
.w4s[data-stack="off"] .s-cards { grid-template-columns: repeat(3, minmax(150px, 1fr)) !important; }
.w4s[data-stack="off"] .s-card:nth-child(3) { grid-column: auto !important; }
.w4s[data-stack="off"] .s-hero { grid-template-columns: 1fr 1fr !important; }
.w4s[data-stack="off"] .s-body { grid-template-columns: 1fr 200px !important; }
.w4s[data-scale="off"] .s-hero-img { width: 560px; flex: none; max-width: none; }
.w4s[data-scale="off"] .s-hero { grid-template-columns: minmax(200px, 1fr) 560px !important; }
.w4s[data-acc="off"] .s-nav { display: flex !important; }
.w4s[data-acc="off"] .s-burger, .w4s[data-acc="off"] .s-menu { display: none !important; }
.w4s[data-acc="off"] .s-hdcta { display: inline-flex !important; }
.w4s[data-acc="off"] .s-fl { display: block !important; }
.w4s[data-acc="off"] .s-ft { grid-template-columns: repeat(3, 160px) !important; }
.w4s[data-margin="off"] { --pad: 0px; }

/* ---------- 斷點滑桿 ---------- */
.w4-rule { position: relative; padding: 0 2px; margin-top: 4px; }
.w4-rule .ticks { position: relative; height: 34px; margin: 0 9px; }
.w4-rule .tk { position: absolute; top: 0; transform: translateX(-50%); text-align: center; font-family: var(--dg-font-mono); font-size: 10.5px; color: var(--dg-ink-faint); }
.w4-rule .tk::after { content: ""; display: block; width: 2px; height: 10px; background: var(--dg-line-strong); margin: 3px auto 0; }
.w4-rule .tk.bp { color: var(--dg-orange-strong); font-weight: 700; }
.w4-rule .tk.bp::after { background: var(--dg-orange); height: 14px; width: 3px; }
.w4-rule .zones { display: flex; height: 8px; border-radius: 4px; overflow: hidden; margin: 0 9px; }
.w4-rule .zones i { display: block; height: 100%; }
.w4-rule .zones i:nth-child(1) { background: #FCD9C4; }
.w4-rule .zones i:nth-child(2) { background: #BFE9EE; }
.w4-rule .zones i:nth-child(3) { background: #BBD3F5; }
.w4-rule input[type="range"] { width: 100%; accent-color: var(--dg-orange); margin: 6px 0 0; height: 30px; cursor: pointer; }
.w4-rule .zl { display: flex; margin: 2px 9px 0; font-family: var(--dg-font-mono); font-size: 10.5px; color: var(--dg-ink-faint); }
.w4-rule .zl span { text-align: center; }
.w4-code { font-family: var(--dg-font-mono); font-size: 12.5px; line-height: 1.9; background: var(--dg-deep); color: #B6DDE2; border-radius: 12px; padding: 12px 14px; overflow-x: auto; }
.w4-code .ln { display: block; white-space: pre-wrap; word-break: break-word; padding: 0 6px; border-radius: 5px; opacity: .45; transition: all .2s; }
.w4-code .ln.ovr { opacity: .8; text-decoration: line-through; text-decoration-color: rgba(255, 255, 255, .35); }
.w4-code .ln.eff { opacity: 1; background: rgba(232, 98, 42, .28); color: #fff; }
.w4-code .cm { color: #6FA3AB; }
.w4-code .ln.eff .cm { color: #FFD3BD; }
.w4-code .ln em { font-style: normal; font-size: 10.5px; background: var(--dg-orange); color: #fff; border-radius: 4px; padding: 0 5px; margin-left: 8px; }
.w4-quick { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.w4-quick button { appearance: none; font-family: var(--dg-font-mono); font-size: 12px; padding: 5px 10px; border-radius: 8px; border: 1px solid var(--dg-line-strong); background: var(--dg-surface); cursor: pointer; color: var(--dg-ink); transition: all .2s; }
.w4-quick button:hover, .w4-quick button.cur { border-color: var(--dg-orange); background: var(--dg-orange-soft); color: var(--dg-orange-strong); }
.w4-diag { margin-top: 12px; display: grid; gap: 6px; }
.w4-diag > div { display: flex; gap: 8px; align-items: flex-start; font-size: 13px; padding: 8px 10px; border-radius: 8px; background: var(--dg-ok-soft); color: #0B5B41; line-height: 1.55; }
.w4-diag > div.bad { background: var(--dg-orange-soft); color: var(--dg-orange-strong); }
.w4-diag > div i { font-style: normal; font-weight: 900; }

/* ---------- 元件實驗室 ---------- */
.w4-btn { --h: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: var(--h); padding: 0 22px; border-radius: var(--w4-r); border: 2px solid transparent; font: 800 15px var(--w4-font); transition: all .18s var(--dg-ease); cursor: pointer; white-space: nowrap; background: var(--w4-pri); color: #fff; user-select: none; }
.w4-btn[data-type="secondary"] { background: transparent; color: var(--w4-pri); border-color: var(--w4-pri); }
.w4-btn[data-type="text"] { background: transparent; color: var(--w4-sec); padding: 0 8px; text-decoration: underline; text-underline-offset: 4px; }
.w4-btn[data-state="hover"][data-type="primary"] { background: color-mix(in srgb, var(--w4-pri) 80%, #fff); transform: translateY(-2px); box-shadow: 0 12px 20px -10px var(--w4-pri); }
.w4-btn[data-state="hover"][data-type="secondary"] { background: color-mix(in srgb, var(--w4-pri) 10%, transparent); }
.w4-btn[data-state="hover"][data-type="text"] { color: color-mix(in srgb, var(--w4-sec) 70%, #000); text-decoration-thickness: 3px; }
.w4-btn[data-state="active"] { transform: scale(.96); filter: brightness(.86); }
.w4-btn[data-state="disabled"] { opacity: .38; filter: grayscale(1); cursor: not-allowed; }
.w4-btn[data-size="s"] { --h: 32px; font-size: 13px; padding: 0 14px; }
.w4-btn[data-size="l"] { --h: 56px; font-size: 17px; padding: 0 30px; }
.w4-btn[data-size="s"][data-type="text"] { padding: 0 6px; }
.w4-btn .ic { display: none; }
.w4-btn[data-icon="on"] .ic { display: inline; }
.w4-lab-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
@media (max-width: 620px) { .w4-lab-grid { grid-template-columns: 1fr; } }
.w4-inst { border: 1.5px solid var(--dg-line); border-radius: 14px; background: var(--dg-surface); padding: 12px; display: flex; flex-direction: column; gap: 10px; transition: border-color .25s; }
.w4-inst.linked { border-color: var(--dg-teal); }
.w4-inst.detached { border-color: var(--dg-orange); border-style: dashed; }
.w4-inst .top { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.w4-inst .lv { font-family: var(--dg-font-mono); font-size: 10.5px; padding: 2px 7px; border-radius: 5px; background: var(--dg-teal-strong); color: #fff; font-weight: 600; }
.w4-inst .st { margin-left: auto; font-family: var(--dg-font-mono); font-size: 11px; color: var(--dg-teal-strong); font-weight: 600; }
.w4-inst.detached .st { color: var(--dg-orange-strong); }
.w4-inst .view { background: #F8FAFC; border-radius: 10px; padding: 14px 10px; min-height: 92px; display: flex; align-items: center; justify-content: center; }
.w4-inst .acts { display: flex; gap: 6px; flex-wrap: wrap; }
.w4-inst .acts button { appearance: none; font: inherit; font-size: 12px; font-weight: 700; padding: 5px 10px; border-radius: 8px; border: 1px solid var(--dg-line-strong); background: var(--dg-surface); cursor: pointer; color: var(--dg-ink); transition: all .2s; }
.w4-inst .acts button:hover { border-color: var(--dg-orange); color: var(--dg-orange-strong); }
.w4-inst .acts button.on { background: var(--dg-orange-soft); border-color: var(--dg-orange); color: var(--dg-orange-strong); }
.w4-mol { display: flex; gap: 6px; align-items: center; background: #fff; border: 1px solid #CBD5E1; border-radius: calc(var(--w4-r) + 4px); padding: 5px; width: 100%; }
.w4-mol .in { flex: 1; min-width: 0; font-size: 13px; color: #64748B; padding: 0 8px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.w4-mol .w4-btn { --h: 38px; padding: 0 14px; font-size: 13px; }
.w4-org { width: 100%; background: #fff; border: 1px solid #CBD5E1; border-radius: 10px; padding: 8px 10px; display: flex; align-items: center; gap: 8px; }
.w4-org b { font-size: 13px; color: var(--w4-pri); }
.w4-org .nv { display: flex; gap: 8px; font-size: 12px; color: #64748B; margin-left: auto; }
.w4-org .w4-btn { --h: 36px; padding: 0 12px; font-size: 12.5px; }
.w4-mcard { width: 100%; max-width: 220px; background: #fff; border: 1px solid #CBD5E1; border-radius: var(--w4-r); padding: 8px; display: grid; gap: 6px; }
.w4-mcard .ph { height: 40px; border-radius: calc(var(--w4-r) * .6); background: linear-gradient(140deg, var(--w4-sec), var(--w4-pri)); }
.w4-mcard b { font-size: 13px; color: var(--w4-pri); }
.w4-mcard .w4-btn { width: 100%; --h: 40px; font-size: 13px; }

/* ---------- 變體矩陣 ---------- */
.w4-matrix { display: grid; grid-template-columns: 78px repeat(4, minmax(0, 1fr)); gap: 6px; align-items: stretch; }
.w4-matrix .hd { font-family: var(--dg-font-mono); font-size: 10.5px; color: var(--dg-ink-faint); display: flex; align-items: center; justify-content: center; text-align: center; }
.w4-matrix .hd.row { justify-content: flex-start; font-weight: 700; color: var(--dg-ink); }
.w4-matrix .cell { appearance: none; border: 1.5px solid var(--dg-line); background: #F8FAFC; border-radius: 10px; padding: 10px 4px; display: grid; place-items: center; cursor: pointer; transition: all .2s; min-height: 62px; position: relative; font: inherit; }
.w4-matrix .cell .w4-btn { pointer-events: none; --h: 32px; padding: 0 10px; font-size: 12px; }
.w4-matrix .cell .w4-btn[data-type="text"] { padding: 0 4px; }
.w4-matrix .cell:hover { border-color: var(--dg-teal); }
.w4-matrix .cell.sel { border-color: var(--dg-orange); background: var(--dg-orange-soft); box-shadow: 0 0 0 3px rgba(232, 98, 42, .15); }
.w4-matrix .cell.live::after { content: "●"; position: absolute; top: 3px; right: 6px; color: var(--dg-ok); font-size: 11px; animation: dgBlink 1s steps(1) infinite; }
.w4-live { display: grid; place-items: center; gap: 10px; padding: 22px 12px; border-radius: 14px; background: #F8FAFC; border: 1px dashed var(--dg-line-strong); text-align: center; }
.w4-live .nm { font-family: var(--dg-font-mono); font-size: 12.5px; color: var(--dg-ink-soft); }
.w4-live .nm b { color: var(--dg-orange-strong); }
.w4-live .w4-btn { user-select: none; }
.w4-touch-badge { font-family: var(--dg-font-mono); font-size: 11.5px; padding: 3px 8px; border-radius: 6px; }
.w4-touch-badge.ok { background: var(--dg-ok-soft); color: var(--dg-ok); }
.w4-touch-badge.no { background: var(--dg-orange-soft); color: var(--dg-bad); }

/* ---------- Auto Layout 實驗 ---------- */
.w4-al-frame { position: relative; background: #fff; border: 1.5px solid #9747FF; border-radius: 8px; display: flex; max-width: 100%; overflow: hidden; flex: none; max-width: none; }
.w4-al-frame::before { content: attr(data-w); position: absolute; top: 0; left: 0; background: #9747FF; color: #fff; font-family: var(--dg-font-mono); font-size: 10px; padding: 1px 6px; border-radius: 0 0 4px 0; z-index: 2; }
.w4-al-child { min-width: 0; border-radius: 8px; font-size: 12.5px; display: flex; align-items: center; padding: 0 12px; white-space: nowrap; overflow: hidden; position: relative; }
.w4-al-child.a { height: 44px; background: var(--dg-teal-soft); border: 1px dashed var(--dg-teal); color: var(--dg-teal-strong); font-family: var(--dg-font-mono); }
.w4-al-child.b { height: 44px; background: var(--dg-orange); color: #fff; font-weight: 800; border: 1px solid var(--dg-orange); }
.w4-al-child.over { outline: 2px solid var(--dg-bad); }
.w4-al-stage { overflow-x: auto; padding: 22px 14px 14px; border-radius: 12px; background-color: var(--dg-surface-3); background-image: linear-gradient(rgba(14, 165, 184, .08) 1px, transparent 1px), linear-gradient(90deg, rgba(14, 165, 184, .08) 1px, transparent 1px); background-size: 16px 16px; }
.w4-panel { border: 1px solid var(--dg-line); border-radius: 12px; background: #FAFAFB; overflow: hidden; font-size: 12.5px; }
.w4-panel h6 { margin: 0; padding: 7px 12px; background: #EDEDF0; font-family: var(--dg-font-mono); font-size: 10.5px; font-weight: 600; letter-spacing: .08em; color: #555; }
.w4-panel .pr { display: grid; grid-template-columns: 74px minmax(0, 1fr); gap: 8px; padding: 7px 12px; align-items: center; border-top: 1px solid #ECECEF; }
.w4-panel .pr > span { font-family: var(--dg-font-mono); font-size: 11px; color: #777; }
.w4-panel .seg2 { display: inline-flex; background: #EDEDF0; border-radius: 7px; padding: 2px; gap: 2px; flex-wrap: wrap; }
.w4-panel .seg2 button { appearance: none; border: 0; background: transparent; font: inherit; font-size: 12px; padding: 3px 9px; border-radius: 5px; cursor: pointer; color: #555; }
.w4-panel .seg2 button[aria-pressed="true"] { background: #fff; color: #111; box-shadow: 0 1px 3px rgba(0, 0, 0, .18); font-weight: 700; }
.w4-panel input[type="range"] { width: 100%; accent-color: #9747FF; }
.w4-panel input[type="text"] { font: inherit; font-size: 12.5px; padding: 4px 8px; border-radius: 6px; border: 1px solid #D0D0D6; width: 100%; min-width: 0; }
.w4-panel output { font-family: var(--dg-font-mono); font-size: 11.5px; color: #333; }

/* ---------- 網格尺規補充 ---------- */
.w4-grid-ctl { display: grid; gap: 4px; margin-top: 12px; }

/* ---------- Style Guide 建構器 ---------- */
.w4-sg { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 18px; align-items: start; }
@media (max-width: 1000px) { .w4-sg { grid-template-columns: minmax(0, 1fr); } }
.w4-steps { display: grid; gap: 6px; margin-bottom: 14px; }
.w4-steps button { appearance: none; font: inherit; cursor: pointer; text-align: left; display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 10px; border: 1.5px solid var(--dg-line); background: var(--dg-surface); transition: all .2s; }
.w4-steps button .n { font-family: var(--dg-font-mono); font-size: 11px; width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; background: var(--dg-surface-3); color: var(--dg-ink-soft); flex: none; font-weight: 700; }
.w4-steps button b { font-size: 14px; color: var(--dg-ink); }
.w4-steps button small { margin-left: auto; font-family: var(--dg-font-mono); font-size: 10.5px; color: var(--dg-ink-faint); }
.w4-steps button.done .n { background: var(--dg-ok); color: #fff; }
.w4-steps button[aria-pressed="true"] { border-color: var(--dg-orange); background: var(--dg-orange-soft); }
.w4-steps button[aria-pressed="true"] .n { background: var(--dg-orange); color: #fff; }
.w4-step-body h4 { font-size: 19px; font-weight: 900; margin: 0 0 4px; }
.w4-step-body .goal { font-size: 14.5px; color: var(--dg-ink-soft); margin-bottom: 10px; }
.w4-ops { list-style: none; padding: 0; margin: 0; counter-reset: op; display: grid; gap: 6px; }
.w4-ops li { counter-increment: op; display: grid; grid-template-columns: 28px 1fr; gap: 8px; font-size: 14px; line-height: 1.65; color: var(--dg-ink-soft); padding: 8px 10px; border-radius: 10px; background: var(--dg-surface); border: 1px solid var(--dg-line); cursor: pointer; transition: all .2s; }
.w4-ops li::before { content: counter(op); width: 24px; height: 24px; border-radius: 50%; background: var(--dg-teal-soft); color: var(--dg-teal-strong); display: grid; place-items: center; font-family: var(--dg-font-mono); font-size: 11px; font-weight: 700; }
.w4-ops li.ck { background: var(--dg-ok-soft); border-color: #B7E3D0; }
.w4-ops li.ck::before { content: "✓"; background: var(--dg-ok); color: #fff; }
.w4-ops li b { color: var(--dg-ink); }
.w4-ops kbd { font-family: var(--dg-font-mono); font-size: 11.5px; background: var(--dg-deep); color: #fff; border-radius: 5px; padding: 1px 6px; }
.w4-ops code { font-size: 12px; background: var(--dg-surface-3); padding: 1px 5px; border-radius: 4px; }
.w4-done { margin-top: 12px; padding: 10px 14px; border-radius: 10px; background: var(--dg-teal-soft); font-size: 13.5px; color: var(--dg-teal-strong); line-height: 1.7; }
.w4-done b { font-family: var(--dg-font-mono); font-size: 11px; letter-spacing: .08em; display: block; }
.w4-nav { display: flex; justify-content: space-between; gap: 8px; margin-top: 14px; }
.w4-canvas { grid-template-columns: minmax(0, 1fr); border-radius: 16px; background: #E9ECEF; border: 1px solid var(--dg-line-strong); padding: 14px; max-height: 760px; overflow-y: auto; display: grid; gap: 14px; position: sticky; top: calc(var(--dg-header-h) + 14px); align-content: start; }
@media (max-width: 1000px) { .w4-canvas { position: static; max-height: 620px; } }
.w4-frame { background: #fff; border-radius: 10px; border: 1.5px dashed #B8C0C8; padding: 14px; position: relative; opacity: .38; transition: opacity .4s, border-color .3s, box-shadow .3s; }
.w4-frame::before { content: attr(data-t); position: absolute; top: -9px; left: 10px; background: #9747FF; color: #fff; font-family: var(--dg-font-mono); font-size: 10px; padding: 1px 7px; border-radius: 4px; }
.w4-frame::after { content: "STEP " attr(data-s) " 尚未建立"; position: absolute; top: 6px; right: 10px; font-family: var(--dg-font-mono); font-size: 10px; color: #8A939B; }
.w4-frame.built { opacity: 1; border-style: solid; border-color: #9747FF; }
.w4-frame.built::after { content: "✓ 已建立"; color: var(--dg-ok); }
.w4-frame.cur { box-shadow: 0 0 0 4px rgba(232, 98, 42, .3); border-color: var(--dg-orange); }
.w4-frame.cur::after { content: "← 目前步驟"; color: var(--dg-orange-strong); font-weight: 700; }
.w4-frame:not(.built) > * { filter: grayscale(.8); pointer-events: none; }
.w4-frame.cur { opacity: 1; border-style: dashed; }
.w4-frame.cur:not(.built) > * { filter: none; opacity: .75; pointer-events: auto; }
.w4-frame.cur.built { border-style: solid; }
.w4-swatches { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-top: 8px; }
.w4-swatches .s { border-radius: 10px; overflow: hidden; border: 1px solid #E2E8F0; }
.w4-swatches .s i { display: block; height: 46px; }
.w4-swatches .s div { padding: 6px 8px; font-family: var(--dg-font-mono); font-size: 10.5px; line-height: 1.5; color: #475569; }
.w4-swatches .s div b { display: block; color: #0F172A; font-size: 11px; }
@media (max-width: 560px) { .w4-swatches { grid-template-columns: repeat(2, 1fr); } }
.w4-tstyles { display: grid; gap: 4px; margin-top: 8px; }
.w4-tstyles > div { display: grid; grid-template-columns: 110px 1fr; gap: 8px; align-items: baseline; padding: 4px 0; border-bottom: 1px solid #EEF1F4; }
.w4-tstyles small { font-family: var(--dg-font-mono); font-size: 10px; color: #7A848C; }
.w4-tstyles span { font-family: var(--w4-head-font); color: var(--w4-pri); overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.w4-space { display: grid; gap: 5px; margin-top: 8px; }
.w4-space > div { display: grid; grid-template-columns: 92px 1fr 40px; gap: 8px; align-items: center; font-family: var(--dg-font-mono); font-size: 10.5px; color: #64748B; }
.w4-space i { display: block; height: 10px; background: var(--w4-sec); border-radius: 2px; }
.w4-radii { display: flex; gap: 10px; margin-top: 10px; flex-wrap: wrap; }
.w4-radii div { width: 76px; height: 56px; background: color-mix(in srgb, var(--w4-sec) 15%, #fff); border: 2px solid var(--w4-sec); display: grid; place-items: center; font-family: var(--dg-font-mono); font-size: 10px; color: var(--w4-pri); text-align: center; }
.w4-gridfr { display: flex; gap: 12px; align-items: flex-end; margin-top: 8px; flex-wrap: wrap; }
.w4-gridfr .g { position: relative; background: #fff; border: 1px solid #CBD5E1; display: grid; gap: var(--gg); padding: 0 var(--gm); height: 70px; grid-template-columns: repeat(var(--gc), 1fr); }
.w4-gridfr .g i { background: rgba(232, 98, 42, .2); }
.w4-gridfr .g.d { width: 250px; --gc: 12; --gg: 3.5px; --gm: 7px; }
.w4-gridfr .g.t { width: 130px; --gc: 8; --gg: 2.5px; --gm: 5px; }
.w4-gridfr .g.m { width: 64px; --gc: 4; --gg: 2px; --gm: 3px; }
.w4-gridfr figure { margin: 0; font-family: var(--dg-font-mono); font-size: 10px; color: #64748B; text-align: center; }
.w4-gridfr figure figcaption { margin-top: 4px; }
.w4-fit { overflow: hidden; border-radius: 8px; border: 1px solid #CBD5E1; background: #fff; }
.w4-asm { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 12px; align-items: start; margin-top: 8px; }
@media (max-width: 560px) { .w4-asm { grid-template-columns: 1fr; } }

/* ---------- RWD 轉換工作台 ---------- */
.w4-phone { border: 9px solid #0B1F24; border-radius: 34px; overflow: hidden; background: #0B1F24; max-width: 394px; margin: 0 auto; box-shadow: 0 24px 40px -24px rgba(0, 0, 0, .5); }
.w4-phone .w4-stage { border-radius: 0; border: 0; --stage-h: 640px; }
.w4-meter { height: 10px; border-radius: 6px; background: var(--dg-surface-3); overflow: hidden; margin: 6px 0 10px; }
.w4-meter span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--dg-orange), var(--dg-ok)); transition: width .4s var(--dg-ease); }
.w4-fix { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 10px; align-items: start; }
.w4-fix .fx { font-size: 12.5px; color: var(--dg-ink-soft); line-height: 1.6; margin-top: 2px; }
.w4-fix .fx code { font-size: 11.5px; background: var(--dg-surface-3); padding: 0 5px; border-radius: 4px; }
.w4-switch .tg { display: none; margin-top: 6px; font-size: 12.5px; color: var(--dg-teal-strong); line-height: 1.6; background: rgba(255, 255, 255, .7); border-radius: 8px; padding: 6px 8px; }
.w4-switch.on .tg { display: block; }

/* ---------- 概念歸類測驗 ---------- */
.w4-quiz { display: grid; gap: 10px; }
.w4-q { padding: 14px 16px; border-radius: 14px; border: 1.5px solid var(--dg-line); background: var(--dg-surface); }
.w4-q p { margin: 0 0 10px; font-size: 15.5px; font-weight: 700; color: var(--dg-ink); line-height: 1.6; }
.w4-q .opts { display: flex; flex-wrap: wrap; gap: 8px; }
.w4-q .opts button { appearance: none; font: inherit; font-size: 13.5px; font-weight: 700; padding: 7px 14px; border-radius: 99px; border: 1.5px solid var(--dg-line-strong); background: var(--dg-surface); cursor: pointer; color: var(--dg-ink); transition: all .2s; }
.w4-q .opts button:hover:not(:disabled) { border-color: var(--dg-orange); }
.w4-q .opts button:disabled { cursor: default; opacity: .55; }
.w4-q .opts button.right { background: var(--dg-ok); border-color: var(--dg-ok); color: #fff; opacity: 1; }
.w4-q .opts button.wrong { background: var(--dg-orange-soft); border-color: var(--dg-bad); color: var(--dg-bad); opacity: 1; }
.w4-q .why { display: none; margin-top: 10px; font-size: 13.5px; line-height: 1.7; color: var(--dg-ink-soft); padding: 8px 12px; border-radius: 8px; background: var(--dg-surface-2); }
.w4-q.answered .why { display: block; }
.w4-q.answered.ok { border-color: var(--dg-ok); }
.w4-q.answered.no { border-color: var(--dg-bad); }
.w4-score { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; font-family: var(--dg-font-mono); font-size: 13px; color: var(--dg-ink-soft); }
.w4-score b { font-family: var(--dg-font-display); font-size: 24px; color: var(--dg-orange-strong); }

/* 觸控熱區測試 */
.w4-tap { position: relative; display: grid; gap: 14px; padding: 16px; border-radius: 14px; background: var(--dg-surface-2); touch-action: none; cursor: none; overflow: hidden; }
.w4-tap .row small { display: block; font-family: var(--dg-font-mono); font-size: 11px; color: var(--dg-ink-faint); margin-bottom: 6px; }
.w4-tap .btns { display: flex; gap: 2px; flex-wrap: wrap; }
.w4-tap button { appearance: none; border: 0; border-radius: 6px; background: var(--dg-teal-strong); color: #fff; font-weight: 800; font-size: 12px; cursor: none; display: grid; place-items: center; transition: background .1s; padding: 0; }
.w4-tap button.hit { background: var(--dg-orange); }
.w4-tap .tip { display: none; position: absolute; width: 44px; height: 44px; border-radius: 50%; background: rgba(232, 98, 42, .22); border: 2px solid var(--dg-orange); transform: translate(-50%, -50%); pointer-events: none; z-index: 3; }
.w4-tap-cap { text-align: center; font-family: var(--dg-font-mono); font-size: 11.5px; color: var(--dg-ink-soft); margin-top: 8px; }

@media (prefers-reduced-motion: reduce) { .w4-frame, .w4-pillar, .w4-btn, .w4-inst, .w4-meter span { transition: none; } }