:root,[data-skin=cartoon]{--bg:#fff8ee;--surface:#fff;--ink:#2a2620;--ink-2:#5a5346;--ink-3:#9a8f7c;--hair:#503c1e1a;--hair-2:#503c1e0f;--accent:#58cc02;--accent-deep:#46a302;--accent-ink:#fff;--accent-soft:#58cc021a;--good:#46a302;--good-soft:#58cc021f;--bad:#e0564b;--bad-soft:#e0564b1a;--glow:#58cc020f;--shadow:0 2px 4px #5f48230a, 0 14px 34px -16px #5f482333;--f-ui:"Nunito", "Noto Sans SC", system-ui, sans-serif;--f-en:"Fredoka", "Noto Sans SC", sans-serif;--r:24px;--ease:cubic-bezier(.22, .61, .36, 1)}[data-skin=luxe]{--bg:#0a0a0a;--surface:#161616;--ink:#f2f0ea;--ink-2:#a8a39a;--ink-3:#7a766e;--hair:#ffffff1a;--hair-2:#ffffff0f;--accent:#f5c518;--accent-deep:#d9ad0e;--accent-ink:#000;--accent-soft:#f5c5181f;--good:#f5c518;--good-soft:#f5c51824;--bad:#e0564b;--bad-soft:#e0564b1f;--glow:#f5c5180d;--shadow:0 1px 3px #00000080, 0 18px 44px -18px #000000b3;--f-en:"Hanken Grotesk", "Noto Sans SC", sans-serif;--r:16px}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{background:var(--bg);color:var(--ink);font-family:var(--f-ui);-webkit-font-smoothing:antialiased;transition:background .5s,color .5s}body:before{content:"";z-index:0;pointer-events:none;background:radial-gradient(120% 60% at 50% -8%, var(--glow), transparent 60%);position:fixed;inset:0}[data-skin=cartoon] body:after{content:"";z-index:0;pointer-events:none;background-image:radial-gradient(#503c1e0d 1px,#0000 1.2px);background-size:23px 23px;position:fixed;inset:0}[data-skin=luxe] body:after{content:"";z-index:0;pointer-events:none;background:radial-gradient(120% 90% at 50% 118%,#0000006b,#0000 58%);position:fixed;inset:0}.top{top:var(--banner-h,0px);z-index:20;background:color-mix(in srgb, var(--bg) 72%, transparent);-webkit-backdrop-filter:blur(16px)saturate(1.2);box-shadow:0 1px 0 var(--hair-2);align-items:center;gap:14px;padding:13px 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13px;font-family:inherit;font-size:13px;font-weight:500;transition:all .3s}.skin button.sel{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}.lang{border:1px solid var(--hair);background:var(--surface);color:var(--ink-2);cursor:pointer;border-radius:10px;outline:none;padding:6px 8px;font-family:inherit;font-size:13px}.lang:hover{color:var(--ink);border-color:var(--accent)}.prog{flex:1;justify-content:center;align-items:center;gap:10px;display:flex}.segs{gap:4px;display:flex}.segs i{background:color-mix(in srgb, var(--ink) 10%, transparent);border-radius:99px;width:16px;height:4px;transition:background .4s}.segs i.on{background:var(--accent);animation:seg-pop .42s var(--ease)}.segs i.no{background:var(--bad);opacity:.75;animation:seg-pop .42s var(--ease)}@keyframes seg-pop{0%{transform:scaleY(1)}42%{transform:scaleY(2.5)}to{transform:scaleY(1)}}.ct{color:var(--ink-3);font-size:13px;font-weight:700}.ct b{color:var(--accent-deep)}[data-skin=luxe] .ct b{color:var(--accent)}.feed{scrollbar-width:none;z-index:1;height:100%;padding:calc(92px + var(--banner-h,0px)) 24px 72px;position:relative;overflow-y:auto}.feed::-webkit-scrollbar{display:none}.col{flex-direction:column;gap:26px;max-width:720px;margin:0 auto;padding-bottom:30vh;display:flex}.msg{opacity:0;filter:blur(6px);transition:opacity .5s var(--ease), transform .7s var(--ease), filter .5s var(--ease);transform:translateY(22px)}.msg.in{opacity:1;filter:none;transform:none}@keyframes route-fade{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.route-fade{animation:route-fade .42s var(--ease) both}.boot-veil{z-index:100;background:var(--bg);position:fixed;inset:0}.verify-banner{z-index:30;box-sizing:border-box;height:40px;color:var(--accent-ink);background:var(--accent);align-items:center;gap:12px;padding:0 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#00000059}.coach{color:var(--ink-2);max-width:560px;font-size:15px;line-height:1.8}.coach.think{color:var(--ink-3);font-style:italic}.dots{vertical-align:middle;align-items:center;gap:5px;display:inline-flex}.dots i{background:var(--ink-3);border-radius:50%;width:6px;height:6px;animation:1.05s infinite dotjump}.dots i:nth-child(2){animation-delay:.14s}.dots i:nth-child(3){animation-delay:.28s}@keyframes dotjump{0%,55%,to{opacity:.4;transform:none}25%{opacity:1;transform:translateY(-4px)}}.caret{vertical-align:-2px;background:var(--accent);width:2px;height:13px;margin-left:3px;animation:.75s step-end infinite caretblink;display:inline-block}@keyframes caretblink{50%{opacity:0}}.plan{text-align:left;flex-direction:column;gap:8px;margin:13px 0 2px 16px;display:flex}.plan .row{color:var(--ink-2);opacity:0;transition:opacity .45s var(--ease), transform .45s var(--ease);align-items:baseline;gap:10px;font-size:15px;display:flex;transform:translateY(8px)}.plan .row.in{opacity:1;transform:none}.plan .row b{font-family:var(--f-en);color:var(--accent);flex-shrink:0;font-size:13px;font-weight:600}.you{align-self:flex-end;align-items:center;gap:9px;max-width:80%;display:flex}.you .blob{background:var(--accent);color:var(--accent-ink);border-radius:16px 16px 5px;padding:12px 18px;font-size:15.5px;font-weight:500;line-height:1.5}.you .chip{color:var(--good);white-space:nowrap;background:var(--good-soft);border-radius:8px;padding:3px 10px;font-size:13px;font-weight:700}.you .chip.bad{color:var(--bad);background:var(--bad-soft)}.col-order{min-height:100%;padding-bottom:0}.compose{flex-direction:column;flex:1;width:100%;max-width:600px;min-height:calc(100dvh - 188px);margin:0 auto;display:flex}.cmp-top{padding-top:7vh}.cmp-row{align-items:flex-start;gap:14px;display:flex}.cmp-ava{background:var(--accent);color:#1b1b1b;width:48px;height:48px;font-family:var(--f-en);box-shadow:0 4px 0 var(--accent-deep);border-radius:50%;flex:none;justify-content:center;align-items:center;font-size:24px;font-weight:700;display:flex}.cmp-bubble{background:var(--surface);border:1px solid var(--hair-2);box-shadow:var(--shadow);border-radius:8px 22px 22px;max-width:470px;padding:22px 26px}.cmp-kick{color:var(--ink-3);margin-bottom:8px;font-size:13px}.cmp-kick b{color:var(--accent-deep);font-weight:700}.cmp-greet{font-family:var(--f-en);letter-spacing:-.015em;margin-bottom:10px;font-size:clamp(30px,3.6vw,40px);font-weight:900;line-height:1.05}[data-skin=luxe] .cmp-greet{font-style:italic}.cmp-q{color:var(--ink-2);margin:0;font-size:16.5px;line-height:1.6}.cmp-quick{margin:26px 0 0 60px}.cmp-qlabel{color:var(--ink-3);font-size:13px}.cmp-sug{flex-wrap:wrap;gap:9px;margin-top:12px;display:flex}.sug{border:1.5px solid var(--hair);background:var(--surface);color:var(--ink-2);cursor:pointer;border-radius:999px;padding:9px 17px;font-family:inherit;font-size:13.5px;transition:all 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var(--accent-deep);border:0;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;transition:background .2s,transform .1s,box-shadow .1s;display:inline-flex}.cmp-send:hover{background:var(--accent-deep);box-shadow:0 2px 0 var(--accent-deep)}.cmp-send:active{box-shadow:0 1px 0 var(--accent-deep);transform:translateY(2px)}.cmp-send:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}.cmp-send svg{fill:none;stroke:currentColor;stroke-width:2.4px;stroke-linecap:round;stroke-linejoin:round;width:20px;height:20px}.cmp-foot{color:var(--ink-3);text-align:center;margin-top:14px;font-size:13px}.cmp-foot b{color:var(--accent-deep);font-weight:700}@media (max-width:640px){.compose{min-height:calc(100dvh - 120px)}.cmp-quick{margin-left:0}.cmp-bubble{padding:16px 18px}}.words{grid-template-columns:repeat(2,1fr);gap:12px;display:grid}.wcard{background:var(--surface);box-shadow:var(--shadow);border-radius:18px;padding:16px 18px}.wcard .en{font-family:var(--f-en);color:var(--ink);font-size:20px;font-weight:600}.wcard .cn{color:var(--ink-2);margin:2px 0 8px;font-size:14px}.wcard .ex{color:var(--ink-3);font-size:13px;line-height:1.6}.wcard .ex b{color:var(--accent-deep);font-weight:700}.wcard .trap{color:var(--bad);background:var(--bad-soft);border-radius:10px;margin-top:10px;padding:7px 10px;font-size:12.5px;line-height:1.5}.wcard .trap .trap-tag{margin-right:6px;font-weight:700}.card{text-align:center;padding:24px 8px;position:relative}.kicker{color:var(--ink-3);justify-content:center;align-items:center;gap:8px;margin-bottom:16px;font-size:13px;display:flex}.kicker:before{content:"";background:var(--accent);opacity:.85;border-radius:2px;width:14px;height:2px}.q-en{font-family:var(--f-en);color:var(--ink);margin-bottom:20px;font-size:32px;font-weight:700}.opts{grid-template-columns:repeat(2,1fr);gap:10px;max-width:460px;margin:0 auto;display:grid}.opt{border:1.5px solid var(--hair);background:var(--surface);color:var(--ink);cursor:pointer;border-radius:14px;padding:15px 16px;font-family:inherit;font-size:16px;transition:all .18s}.opt:hover:not(:disabled){border-color:var(--accent)}.opt:disabled{cursor:default}.opt.right{border-color:var(--good);background:var(--good-soft);color:var(--good);font-weight:700}.opt.wrong{border-color:var(--bad);background:var(--bad-soft);color:var(--bad);font-weight:700}.opt.sel{border-color:var(--accent);background:var(--accent-soft)}.q-cloze{color:var(--ink);max-width:520px;margin:0 auto 22px;font-size:21px;font-weight:600;line-height:1.6}.q-sub{color:var(--ink-3);max-width:520px;margin:-10px auto 22px;font-size:14px}.teach{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);text-align:left;padding:22px 24px 20px}.teach-kick{letter-spacing:.01em;color:var(--accent-deep);margin-bottom:12px;font-size:13px;font-weight:700}.teach-rule{color:var(--ink);margin-bottom:14px;font-size:16px;line-height:1.7}.teach-blocks{flex-direction:column;gap:12px;margin-bottom:16px;display:flex}.teach-blk{border-left:2px solid var(--accent);padding-left:12px}.teach-tag{color:var(--accent-deep);background:var(--accent-soft);border-radius:7px;margin-bottom:6px;padding:2px 8px;font-size:12px;font-weight:700;display:inline-block}.teach-txt{color:var(--ink-2);font-size:14.5px;line-height:1.65}.teach-txt b{color:var(--ink);font-weight:700}.teach-pts{flex-direction:column;gap:4px;margin:7px 0 0;padding:0;list-style:none;display:flex}.teach-pts li{color:var(--ink-2);padding-left:15px;font-size:13.5px;line-height:1.55;position:relative}.teach-pts li:before{content:"";background:var(--accent);border-radius:50%;width:5px;height:5px;position:absolute;top:8px;left:2px}.teach-pts li b{color:var(--ink);font-weight:700}.teach-ex{background:color-mix(in srgb, var(--accent) 7%, var(--surface));border-radius:14px;margin-bottom:16px;padding:14px 16px}.teach-ex-en{font-family:var(--f-en);color:var(--ink);font-size:19px;font-weight:600;line-height:1.5}.teach-ex-en b{color:var(--accent-deep)}.teach-ex-cn{color:var(--ink-3);margin-top:5px;font-size:13.5px}.teach-actions{align-items:center;gap:12px;display:flex}.listen-btn{border:1.5px solid var(--hair);background:var(--surface);color:var(--ink-2);cursor:pointer;border-radius:14px;padding:11px 18px;font-family:inherit;font-size:14px;font-weight:600;transition:all .2s}.listen-btn:hover{border-color:var(--accent);color:var(--accent-deep)}.passage-en{font-family:var(--f-en);color:var(--ink);margin-bottom:10px;font-size:17px;line-height:1.75}.passage-cn{color:var(--ink-3);margin-bottom:14px;font-size:14px;line-height:1.7}.passage-idiom{background:color-mix(in srgb, var(--accent) 7%, var(--surface));border-radius:14px;margin-bottom:16px;padding:12px 15px}.passage-idiom b{font-family:var(--f-en);color:var(--accent-deep);font-size:15.5px;font-weight:600;display:block}[data-skin=luxe] .passage-idiom b{color:var(--accent)}.passage-idiom span{color:var(--ink-3);margin-top:4px;font-size:13px;display:block}.passage-wait{color:var(--ink-3);align-items:center;gap:8px;font-size:14.5px;display:flex}.card.tr{text-align:left}.tr-source{color:var(--ink);margin:6px 0 16px;font-size:19px;font-weight:600;line-height:1.6}.tr-in{border:1.5px solid var(--hair);background:var(--bg);width:100%;color:var(--ink);font-family:var(--f-en);border-radius:14px;outline:none;padding:13px 15px;font-size:16px;transition:border-color .2s}.tr-in:focus{border-color:var(--accent)}.tr-actions{justify-content:flex-end;margin-top:14px;display:flex}.tr-result{flex-direction:column;gap:12px;display:flex}.tr-you{align-items:center;gap:10px;display:flex}.tr-youtext{font-family:var(--f-en);color:var(--ink);font-size:16px}.tr-tip{color:var(--ink-2);font-size:14.5px;line-height:1.6}.tr-fix{background:var(--accent-soft);font-family:var(--f-en);border-radius:12px;flex-wrap:wrap;align-items:center;gap:8px;padding:10px 13px;font-size:14.5px;display:flex}.tr-fix-label{font-family:var(--f-ui);color:var(--accent-deep);font-size:12px;font-weight:700}.tr-was{color:var(--ink-3);text-decoration:line-through}.tr-arrow{color:var(--ink-3)}.tr-better{color:var(--accent-deep);font-weight:700}[data-skin=luxe] .tr-fix-label,[data-skin=luxe] .tr-better{color:var(--accent)}.tr-ref{font-size:14px}.tr-ref-label{color:var(--ink-3);margin-right:8px;font-size:12px;font-weight:700}.tr-ref-en{font-family:var(--f-en);color:var(--ink-2)}.build-prompt{color:var(--ink-2);text-align:center;margin:4px 0 16px;font-size:16px}.build-line{border:1.5px dashed var(--hair);border-radius:14px;flex-wrap:wrap;align-items:center;gap:8px;min-height:52px;margin-bottom:16px;padding:10px 12px;transition:border-color .3s,background .3s;display:flex}.build-line.right{border-style:solid;border-color:var(--accent);background:var(--good-soft)}.build-line.wrong{border-style:solid;border-color:var(--bad);background:var(--bad-soft)}.build-ph{color:var(--ink-3);font-size:14px}.build-bank{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.tile{border:1.5px solid var(--hair);background:var(--surface);color:var(--ink);font-family:var(--f-en);cursor:pointer;border-radius:12px;padding:9px 15px;font-size:16px;font-weight:600;transition:all .15s}.tile:hover{border-color:var(--accent)}.tile.used{opacity:.25;cursor:default}.tile.placed{border-color:var(--accent);background:var(--accent-soft)}.build-actions{justify-content:center;margin-top:18px;display:flex}.dictate-in{margin-top:18px}.card.scene{text-align:left}.scene-log{flex-direction:column;gap:14px;margin:14px 0 4px;display:flex}.scene-staff{align-items:flex-start;gap:10px;display:flex}.scene-play{border:1.5px solid var(--hair);background:var(--surface);width:30px;height:30px;color:var(--accent-deep);cursor:pointer;border-radius:50%;flex:none;margin-top:2px;font-size:12px}.scene-play:hover{border-color:var(--accent)}.scene-bubble{background:color-mix(in srgb, var(--ink) 5%, var(--surface));border-radius:4px 16px 16px;max-width:80%;padding:10px 14px}.scene-en{font-family:var(--f-en);color:var(--ink);font-size:16px}.scene-cn{color:var(--ink-3);margin-top:3px;font-size:13px}.scene-you-wrap{flex-direction:column;align-self:flex-end;align-items:flex-end;max-width:80%;display:flex}.scene-you{background:var(--accent);color:var(--accent-ink);font-family:var(--f-en);border-radius:16px 4px 16px 16px;padding:10px 14px;font-size:16px}.scene-tip{color:var(--ink-3);text-align:right;margin-top:5px;font-size:12.5px}.scene-input{gap:10px;margin-top:14px;display:flex}.scene-input .tr-in{flex:1}.scene-actions{justify-content:center;margin-top:16px;display:flex}.speak{background:var(--accent);width:84px;height:84px;color:var(--accent-ink);cursor:pointer;box-shadow:var(--shadow);border:0;border-radius:50%;justify-content:center;align-items:center;margin:0 auto 22px;transition:transform .1s,background .2s;display:flex}.speak:hover{background:var(--accent-deep)}.speak:active{transform:scale(.94)}.match{grid-template-columns:1fr 1fr;gap:10px 14px;max-width:460px;margin:0 auto;display:grid}.match-col{flex-direction:column;gap:10px;display:flex}.btn{background:var(--accent);color:var(--accent-ink);cursor:pointer;border:0;border-radius:14px;padding:12px 24px;font-family:inherit;font-size:15px;font-weight:700;transition:background .25s,transform .1s}.btn:hover{background:var(--accent-deep)}.btn:active{transform:scale(.96)}.center{text-align:center}.topham,.topmenu{display:none}@media (max-width:640px){.top{gap:8px;padding:11px 14px}.brand{white-space:nowrap}.top-right{display:none}.topham{border:1px solid var(--hair);background:var(--surface);width:36px;height:36px;color:var(--ink-2);cursor:pointer;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;margin-left:auto;font-size:18px;line-height:1;display:flex}.topmenu{background:var(--surface);border:1px solid var(--hair);min-width:188px;box-shadow:var(--shadow);z-index:30;border-radius:14px;flex-direction:column;gap:2px;padding:7px;display:flex;position:absolute;top:calc(100% + 6px);right:12px}.topmenu .topmi{color:var(--ink);text-align:left;cursor:pointer;background:0 0;border:0;border-radius:10px;padding:10px 12px;font-family:inherit;font-size:14.5px;font-weight:600}.topmenu .topmi:hover{background:var(--accent-soft)}.topmi-row{justify-content:space-between;align-items:center;gap:8px;padding:8px 10px 4px;display:flex}.topmenu .lang{font-size:13px}.feed{padding:calc(74px + var(--banner-h,0px)) 16px 64px}.words{grid-template-columns:1fr}}