.view{padding-bottom:calc(84px + var(--safe-b))}
#game{padding-bottom:var(--safe-b)}

/* 顶栏 */
.topbar{
  display:flex;align-items:center;gap:10px;
  padding:calc(10px + var(--safe-t)) 14px 6px;max-width:480px;margin:0 auto;
}
.icon-btn{
  width:40px;height:40px;border-radius:50%;display:grid;place-items:center;flex:none;
  background:var(--card);box-shadow:var(--shadow-1);transition:transform .12s;
}
.icon-btn:active{transform:scale(.92)}
.icon-btn svg,.pill-btn svg,.dock-btn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.topbar-title{flex:1;min-width:0;line-height:1.2}
.topbar-title b{display:block;font-size:18px;letter-spacing:.02em}
.topbar-title span{font-size:13px;color:var(--muted)}
.pill-btn{
  display:inline-flex;align-items:center;gap:5px;height:36px;padding:0 14px 0 11px;border-radius:999px;
  background:var(--ink);color:#FFF6EC;font-size:14px;font-weight:600;transition:transform .12s;flex:none;
}
.pill-btn svg{width:17px;height:17px}
.pill-btn:active{transform:scale(.95)}
.pill-btn.ghosty{background:var(--accent-soft);color:var(--accent);padding:0 14px}

/* 舞台：吸顶，拖滑块时一直看得见布 */
.stage{
  position:-webkit-sticky;position:sticky;top:0;z-index:5;
  padding:8px 16px 10px;max-width:480px;margin:0 auto;
  background:linear-gradient(var(--bg) 82%,rgba(244,238,228,0));
}
.canvas-card{
  position:relative;margin:0 auto;
  width:min(calc(100vw - 32px),40vh,448px);aspect-ratio:1/1;
  border-radius:20px;overflow:hidden;background:#E9E1D4;
  box-shadow:0 1px 0 rgba(255,255,255,.7) inset,0 2px 6px rgba(58,40,24,.08),0 18px 36px -12px rgba(58,40,24,.28);
}
@supports not (aspect-ratio:1/1){.canvas-card{height:min(calc(100vw - 32px),40vh,448px)}}
.canvas-card canvas{display:block;width:100%;height:100%}
.badge{
  position:absolute;left:10px;bottom:10px;padding:4px 10px;border-radius:999px;
  background:rgba(255,252,247,.86);color:var(--ink-2);font-size:13px;font-weight:600;
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  opacity:0;transform:translateY(4px);transition:opacity .2s,transform .2s;pointer-events:none;
  font-variant-numeric:tabular-nums;
}
.badge.show{opacity:1;transform:none}

/* 分段切换 */
.seg{
  position:relative;display:flex;margin:10px auto 0;padding:3px;border-radius:999px;
  width:min(calc(100vw - 32px),448px);
  background:rgba(120,95,65,.10);
}
.seg button{position:relative;z-index:1;flex:1;height:34px;border-radius:999px;font-size:14px;color:var(--ink-2);font-weight:500;transition:color .2s}
.seg button.on{color:var(--ink);font-weight:700}
.seg-ind{
  position:absolute;top:3px;bottom:3px;left:3px;border-radius:999px;background:var(--card);
  box-shadow:0 1px 3px rgba(58,40,24,.15);transition:transform .28s cubic-bezier(.2,.8,.2,1),width .28s;
}

.panel{max-width:480px;margin:0 auto;padding:4px 16px 0}
.sec-title{display:flex;align-items:baseline;justify-content:space-between;margin:14px 2px 8px}
.sec-title span{font-size:16px;font-weight:700}
.sec-title em{font-style:normal;font-size:13px;color:var(--muted)}

/* 横向滚动列表 */
.hscroll{
  display:flex;gap:10px;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;
  margin:0 -16px;padding:2px 16px 8px;scroll-snap-type:x proximity;scrollbar-width:none;
}
.hscroll::-webkit-scrollbar{display:none}
.chip{
  flex:none;width:72px;scroll-snap-align:start;text-align:center;font-size:13px;color:var(--ink-2);
  transition:transform .12s;
}
.chip:active{transform:scale(.94)}
.chip canvas{
  display:block;width:64px;height:64px;margin:0 auto 5px;border-radius:16px;
  box-shadow:0 1px 3px rgba(58,40,24,.14);outline:2px solid transparent;outline-offset:2px;
  transition:outline-color .2s,box-shadow .2s;
}
.chip.on{color:var(--ink);font-weight:700}
.chip.on canvas{outline-color:var(--accent);box-shadow:0 6px 14px -4px rgba(182,83,47,.45)}

/* 公式卡 */
.formula-card{padding:16px 16px 14px;margin-top:6px}
.formula-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:10px}
.formula-head b{font-size:16px}
.formula{
  font-family:var(--font-math);font-size:16px;line-height:1.75;color:var(--ink);
  background:repeating-linear-gradient(transparent 0 27px,rgba(182,83,47,.07) 27px 28px);
  border-left:3px solid var(--accent);padding:2px 0 2px 12px;
  overflow-wrap:break-word;
}
.formula div{margin:1px 0}
.formula i{font-style:italic;font-family:var(--font-math)}
.vals{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0 2px}
.vals span{
  font-family:var(--font-math);font-size:15px;padding:2px 10px;border-radius:999px;
  background:var(--accent-soft);color:#7A3519;font-variant-numeric:tabular-nums;
}
.vals span i{font-style:italic}
.tip{margin-top:12px;padding:12px 12px 10px;border-radius:14px;background:#F6EFE4}
.tip-label{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.06em}
.tip p{margin:4px 0 0;font-size:14px;line-height:1.7;color:var(--ink-2)}
.tip i{font-family:var(--font-math);font-style:italic}
.formula-card.mini{padding:12px 14px;margin-top:10px}
.formula-card.mini .formula{font-size:15px}

/* 滑块 */
.sliders{padding:6px 16px;margin-top:12px}
.sl{padding:12px 0 10px;border-bottom:1px solid var(--line)}
.sl:last-child{border-bottom:0}
.sl-top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px}
.sl-name{font-size:14px;color:var(--ink-2)}
.sl-name i{font-family:var(--font-math);font-size:17px;color:var(--ink);margin-right:4px}
.sl-val{font-family:var(--font-math);font-size:17px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums}
.sl.locked{opacity:.55}
.sl.locked .sl-val{color:var(--ink-2)}
input[type=range]{
  -webkit-appearance:none;appearance:none;width:100%;height:30px;margin:0;background:transparent;
  touch-action:pan-y;--p:50%;
}
input[type=range]::-webkit-slider-runnable-track{
  height:6px;border-radius:6px;
  background:linear-gradient(90deg,var(--accent) 0,var(--accent) var(--p),#E6DCCD var(--p));
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:28px;height:28px;margin-top:-11px;border-radius:50%;
  background:#fff;border:0;box-shadow:0 1px 2px rgba(0,0,0,.18),0 4px 10px rgba(58,40,24,.22),0 0 0 6px rgba(182,83,47,.0);
  transition:box-shadow .15s,transform .15s;
}
input[type=range]:active::-webkit-slider-thumb{transform:scale(1.1);box-shadow:0 1px 2px rgba(0,0,0,.18),0 4px 12px rgba(58,40,24,.25),0 0 0 8px rgba(182,83,47,.14)}
input[type=range]::-moz-range-track{height:6px;border-radius:6px;background:#E6DCCD}
input[type=range]::-moz-range-progress{height:6px;border-radius:6px;background:var(--accent)}
input[type=range]::-moz-range-thumb{width:28px;height:28px;border:0;border-radius:50%;background:#fff;box-shadow:0 4px 10px rgba(58,40,24,.22)}
input[type=range]:disabled::-webkit-slider-thumb{box-shadow:0 1px 2px rgba(0,0,0,.12)}
.ticks{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-top:2px;font-variant-numeric:tabular-nums}

/* 色板 */
.pal{flex:none;width:62px;text-align:center;font-size:13px;color:var(--ink-2);transition:transform .12s}
.pal:active{transform:scale(.94)}
.pal-dot{
  width:48px;height:48px;margin:0 auto 5px;border-radius:50%;overflow:hidden;display:grid;
  grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;transform:rotate(45deg);
  box-shadow:0 1px 3px rgba(58,40,24,.2);outline:2px solid transparent;outline-offset:3px;transition:outline-color .2s;
}
.pal.on{color:var(--ink);font-weight:700}
.pal.on .pal-dot{outline-color:var(--ink)}

/* 底部操作栏 */
.dock{
  position:fixed;left:0;right:0;bottom:0;z-index:20;
  display:flex;align-items:center;gap:6px;
  padding:10px 14px calc(10px + var(--safe-b));
  background:rgba(255,252,247,.92);
  -webkit-backdrop-filter:saturate(1.4) blur(14px);backdrop-filter:saturate(1.4) blur(14px);
  border-top:1px solid var(--line);
}
.dock-btn{
  display:flex;flex-direction:column;align-items:center;gap:2px;width:68px;font-size:13px;color:var(--ink-2);
  transition:transform .12s;
}
.dock-btn:active{transform:scale(.92)}
.dock-btn svg{width:22px;height:22px;color:var(--ink)}
.dock-main{flex:1;height:48px}
@media (min-width:520px){.dock{justify-content:center}.dock-main{flex:0 0 260px}}

/* 首次引导 */
.guide{
  position:fixed;inset:0;z-index:40;display:flex;align-items:flex-end;justify-content:center;
  background:rgba(30,22,16,.42);opacity:0;transition:opacity .25s;
}
.guide.show{opacity:1}
.guide-card{
  width:calc(100% - 28px);max-width:440px;margin-bottom:calc(14px + var(--safe-b));
  background:var(--card);border-radius:24px;padding:22px 20px 18px;box-shadow:var(--shadow-2);
  transform:translateY(16px);transition:transform .3s cubic-bezier(.2,.8,.2,1);
}
.guide.show .guide-card{transform:none}
.guide-card h3{margin:0 0 14px;font-size:20px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:16px}
.step{background:#F6EFE4;border-radius:16px;padding:12px 8px 10px;text-align:center}
.step b{display:grid;place-items:center;width:26px;height:26px;margin:0 auto 6px;border-radius:50%;background:var(--accent);color:#fff;font-size:14px}
.step span{display:block;font-size:14px;font-weight:600;line-height:1.35}
.step em{display:block;font-style:normal;font-size:13px;color:var(--muted);margin-top:2px}
.guide-card .btn{width:100%}

/* 弹层表单 */
.field{display:block;width:100%;height:48px;border-radius:14px;border:1px solid var(--line);background:#fff;padding:0 14px;font-size:16px;margin:4px 0 14px;outline:none}
.field:focus{border-color:var(--accent)}
.linkbox{font-size:13px;color:var(--ink-2);background:#F6EFE4;border-radius:12px;padding:10px 12px;word-break:break-all;margin-bottom:14px;-webkit-user-select:all;user-select:all}
.sheet .row{display:flex;gap:10px}
.sheet .row .btn{flex:1}
.sheet-hint{font-size:13px;color:var(--muted);margin-top:12px;text-align:center}

/* ================= 闯关 ================= */
.game-hero{padding:16px;margin-top:8px}
.game-hero p{margin:6px 0 0;color:var(--ink-2);font-size:15px}
.game-hero b{color:var(--accent)}
.level-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:14px}
.lv{
  position:relative;background:var(--card);border-radius:18px;padding:10px;box-shadow:var(--shadow-1);
  text-align:left;transition:transform .12s;
}
.lv:active{transform:scale(.97)}
.lv canvas{display:block;width:100%;aspect-ratio:1.6/1;border-radius:12px}
.lv-meta{display:flex;justify-content:space-between;align-items:center;margin-top:8px}
.lv-meta b{font-size:15px}
.lv-meta span{font-size:13px;color:var(--muted)}
.lv-no{position:absolute;top:16px;left:16px;font-size:13px;font-weight:700;background:rgba(255,252,247,.9);border-radius:999px;padding:1px 9px}
.lv-done{position:absolute;top:16px;right:16px;font-size:13px;font-weight:700;background:var(--good);color:#fff;border-radius:999px;padding:1px 9px}
.stars{color:#D6A13A;letter-spacing:1px;font-size:13px}

.duo{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:8px 16px 0;max-width:480px;margin:0 auto;position:-webkit-sticky;position:sticky;top:0;z-index:5;background:var(--bg)}
.duo figure{margin:0;position:relative}
.duo canvas{display:block;width:100%;aspect-ratio:1/1;border-radius:16px;box-shadow:0 10px 22px -10px rgba(58,40,24,.35)}
.duo figcaption{position:absolute;left:8px;top:8px;font-size:13px;font-weight:700;background:rgba(255,252,247,.9);border-radius:999px;padding:1px 9px}
.meter{padding:14px 16px 12px;margin-top:12px}
.meter-top{display:flex;justify-content:space-between;align-items:baseline}
.meter-top span{font-size:14px;color:var(--ink-2)}
.meter-top b{font-size:30px;font-variant-numeric:tabular-nums;letter-spacing:-.02em;transition:color .2s}
.meter-top b.pass{color:var(--good)}
.meter-bar{position:relative;height:10px;border-radius:10px;background:#EDE4D7;margin:6px 0 8px;overflow:hidden}
.meter-bar i{position:absolute;left:0;top:0;bottom:0;width:0;border-radius:10px;background:linear-gradient(90deg,#D9A27F,var(--accent));transition:width .18s ease}
.meter-bar i.pass{background:linear-gradient(90deg,#7DB08F,var(--good))}
.meter-bar em{position:absolute;left:90%;top:-2px;bottom:-2px;width:2px;background:var(--ink);opacity:.45}
.meter-foot{display:flex;justify-content:space-between;font-size:13px;color:var(--muted)}
.game-actions{display:flex;gap:10px;margin-top:12px}
.game-actions .btn{flex:1}

.win-badge{width:64px;height:64px;border-radius:50%;margin:0 auto 10px;display:grid;place-items:center;background:var(--good);color:#fff;font-size:30px;box-shadow:0 10px 24px -8px rgba(63,125,92,.6)}
.win h3{text-align:center}
.win .sub{text-align:center;color:var(--muted);font-size:14px;margin-bottom:14px}
.lesson{background:#F6EFE4;border-radius:14px;padding:12px 14px;margin-bottom:16px;font-size:15px;line-height:1.7;color:var(--ink-2)}
.lesson b{color:var(--ink)}
.lesson i{font-family:var(--font-math)}