@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes popIn{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}@keyframes resultIn{0%{opacity:0;transform:scale(.94)}to{opacity:1;transform:scale(1)}}:root{--bg:#ffffff;--text:#111318;--muted:#6b7280;--card:#ffffff;--border:rgba(0, 0, 0, .08);--shadow:0 12px 40px rgba(0, 0, 0, .08);--accent:#6440fb;--accent-light:#8b74fc;--accent-text:#fff;--brand-soft:#ede9fe;--success:#16a34a;--danger:#dc2626;--warning-bg:#fff3cd;--warning-text:#856404;--r:18px}[data-theme=dark]{--bg:#16181d;--text:rgba(255, 255, 255, .90);--muted:rgba(255, 255, 255, .55);--card:#1e2126;--border:rgba(255, 255, 255, .12);--shadow:0 12px 40px rgba(0, 0, 0, .50);--accent:#8b74fc;--accent-light:#b4a7fe;--accent-text:#16181d;--brand-soft:rgba(139, 116, 252, .15);--success:#22c55e;--danger:#ef4444;--warning-bg:rgba(255, 193, 7, .12);--warning-text:#ffc107}*{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,"Noto Sans SC",sans-serif;background:var(--bg);color:var(--text);min-height:100vh;transition:background .4s ease,color .4s ease}.warning-msg{animation:slideDown .3s ease both}.top{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.top-inner{max-width:900px;margin:0 auto;height:94px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{display:flex;flex-direction:column;align-items:flex-start;gap:2px;flex-shrink:0}.logo-link{display:flex;align-items:center}.logo-img{width:160px!important;height:auto!important;display:block;max-width:100%}[data-theme=dark] .logo-light-img,[data-theme=light] .logo-dark-img{display:none}.brand-sub{font-size:15px;color:var(--muted);white-space:nowrap;margin-left:5px}.controls{display:flex;align-items:center;gap:10px;flex-shrink:0}.lang-toggle{display:flex;position:relative;background:color-mix(in srgb,var(--card) 90%,transparent);border:1px solid var(--border);border-radius:999px;overflow:hidden}.lang-option{position:relative;z-index:2;border:0;background:0 0;color:var(--text);padding:6px 13px;font-size:11px;font-weight:500;cursor:pointer;transition:color .3s ease;white-space:nowrap;font-family:inherit}.lang-option.active{color:var(--accent-text)}.lang-slider{position:absolute;top:2px;bottom:2px;left:2px;width:35px;background:var(--accent);border-radius:999px;z-index:1;transition:left .35s cubic-bezier(.4,0,.2,1),width .35s cubic-bezier(.4,0,.2,1)}.search-row,.theme-btn{display:flex;justify-content:center}.theme-btn{border:1px solid var(--border);background:color-mix(in srgb,var(--card) 90%,transparent);color:var(--text);padding:7px 11px;border-radius:999px;cursor:pointer;align-items:center;transition:background .3s,transform .2s}.theme-btn:hover{transform:rotate(15deg)}.tab-btn h3 .tab-short,[data-theme=dark] .icon-sun,[data-theme=light] .icon-moon{display:none}.search-row{max-width:900px;margin:0 auto;padding:4px 16px 12px}.search{width:100%;display:flex;align-items:center;gap:10px;padding:12px 16px;border-radius:999px;background:color-mix(in srgb,var(--card) 92%,transparent);border:2px solid var(--border);box-shadow:0 4px 18px rgba(0,0,0,.05);transition:border-color .3s,box-shadow .3s}.search:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 14%,transparent),0 6px 20px rgba(0,0,0,.06)}.clear-btn,.search-icon{flex-shrink:0;color:var(--muted)}.search-icon{opacity:.85}.clear-btn{border:0;background:0 0;cursor:pointer;padding:3px 5px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:color .2s,background .2s}.clear-btn:hover{color:var(--text);background:var(--border)}.search input{width:100%;border:0;outline:0;background:0 0;color:var(--text);font-size:16px;font-weight:500;padding:2px 0}.search input::placeholder{color:var(--muted);opacity:.7;font-weight:400}.layout{max-width:900px;margin:0 auto;padding:10px 16px 60px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}.head{padding:0;display:flex;justify-content:space-between;align-items:center;gap:0;border-bottom:1px solid var(--border);flex-wrap:wrap}.tab-bar{display:flex;flex:1;min-width:0}.tab-btn{flex:1;border:0;background:0 0;color:var(--muted);padding:12px 16px 10px;cursor:pointer;font-family:inherit;transition:color .3s,background .3s;border-bottom:2px solid transparent;white-space:nowrap}.tab-btn h3{margin:0;font-size:13px;font-weight:600}.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent)}.tab-btn:hover{background:rgba(0,0,0,.03)}[data-theme=dark] .tab-btn:hover{background:rgba(255,255,255,.04)}.btn,.head .btns{display:flex;align-items:center}.head .btns{gap:6px;padding:8px 12px;flex-shrink:0;flex-wrap:wrap}.btn{border:1px solid var(--border);background:color-mix(in srgb,var(--card) 92%,transparent);color:var(--text);padding:7px 12px;border-radius:10px;font-size:12px;cursor:pointer;white-space:nowrap;transition:all .2s ease;gap:5px;font-family:inherit}.btn:hover{background:var(--border);transform:translateY(-1px)}.btn:active{transform:scale(.96)}.btn.primary{background:var(--accent);color:#fff;border:0}.btn.primary:hover{background:var(--accent-light)}.body{padding:14px 16px}.tab-content{display:none}.tab-content.active{display:block;animation:fadeIn .25s ease both}.warning-msg{background:var(--warning-bg);color:var(--warning-text);padding:8px 14px;border-radius:10px;font-size:13px;margin-bottom:12px;text-align:center}.empty-state{text-align:center;padding:40px 20px;color:var(--muted);font-size:14px}.tianzige,.tianzige-wrap{display:flex;justify-content:center}.tianzige-wrap{flex-wrap:wrap;gap:24px;padding:4px 0 8px}.tianzige{width:300px;height:300px;max-width:100%;position:relative;border:2px solid var(--accent);border-radius:8px;overflow:hidden;align-items:center;background:color-mix(in srgb,var(--card) 85%,transparent)}.grid-line{position:absolute;background:var(--accent);opacity:.25;pointer-events:none}.h-mid{width:100%;height:1px;top:50%;left:0}.v-mid{height:100%;width:1px;left:50%;top:0}.grid-svg{position:absolute;inset:0;width:100%;height:100%;z-index:1;pointer-events:none;color:var(--accent)}#hanzi-practice,.writer-target{position:absolute;inset:0;z-index:5;justify-content:center}#hanzi-practice svg,.writer-target svg{max-width:100%;max-height:100%;display:block}.writer-target svg{margin:0 auto;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}#hanzi-practice{z-index:2;touch-action:none;user-select:none;-webkit-user-select:none;display:flex;align-items:center;overflow:hidden}#hanzi-practice svg{width:auto!important;height:auto!important;margin:auto}#hanzi-practice-wrap{width:300px;height:300px;flex:0 0 auto}.tianzige-wrap.all-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;justify-items:center}.tianzige-wrap.all-grid .tianzige{width:100%;max-width:300px;height:auto;aspect-ratio:1/1}.all-nav,.nav-bar,.speed-box,.writer-target{display:flex;align-items:center}.all-nav,.nav-bar{justify-content:center;gap:16px;padding:8px 0 14px}.all-nav .nav-btn,.nav-bar .nav-btn{font-size:14px;padding:6px 14px;border-radius:8px}.all-nav span,.nav-bar span{font-size:14px;color:var(--text);text-align:center}.all-nav span{font-weight:600;min-width:90px}.nav-bar span{min-width:60px}.speed-box{margin-top:10px;padding:12px 16px;background:rgba(0,0,0,.025);border-radius:12px;gap:10px;font-size:13px;white-space:nowrap}[data-theme=dark] .speed-box{background:rgba(255,255,255,.05)}.nav-bar span,.speed-box label{font-weight:600}.speed-box #speed-val{font-weight:700;color:var(--accent);min-width:30px;text-align:right;font-variant-numeric:tabular-nums}.speed-box input[type=range]{-webkit-appearance:none;appearance:none;flex:1;min-width:80px;height:8px;border-radius:999px;outline:0;cursor:pointer;background:linear-gradient(to right,var(--accent) var(--fill, 50%),color-mix(in srgb,var(--text) 16%,transparent) var(--fill, 50%));transition:background .12s linear}.speed-box input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;border-radius:50%;background:#fff;border:3px solid var(--accent);box-shadow:0 2px 8px rgba(0,0,0,.25);cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,border-width .15s ease}.speed-box input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.12)}.speed-box input[type=range]:active::-webkit-slider-thumb{transform:scale(1.22);box-shadow:0 0 0 9px color-mix(in srgb,var(--accent) 16%,transparent);border-width:4px}.speed-box input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid var(--accent);box-shadow:0 2px 8px rgba(0,0,0,.25);cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}.speed-box input[type=range]:active::-moz-range-thumb{transform:scale(1.2);box-shadow:0 0 0 9px color-mix(in srgb,var(--accent) 16%,transparent)}.speed-box input[type=range]::-moz-range-track{height:8px;border-radius:999px;background:0 0}.section{margin-top:20px}.section h4{font-size:13px;margin-bottom:8px}.steps-container{display:flex;flex-direction:column;gap:10px;width:100%;max-width:100%}.steps-char-tabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}.steps-char-tab{min-width:36px;height:32px;padding:0 10px;border:1px solid var(--border);border-radius:8px;background:var(--card);color:var(--muted);font-size:18px;font-weight:600;cursor:pointer;transition:all .2s ease;font-family:inherit;display:inline-flex;align-items:center;justify-content:center}.steps-char-tab:hover{border-color:var(--accent-light);color:var(--accent)}.steps-char-tab.active{background:var(--brand-soft);border-color:var(--accent);color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 14%,transparent)}.strip{display:flex;flex-wrap:wrap;gap:6px}.mini-box{width:75px;height:75px;background:color-mix(in srgb,var(--card) 95%,transparent);border-radius:8px;border:1px solid var(--border);flex-direction:column;align-items:center;position:relative;padding:3px;pointer-events:none;cursor:default}.mini-box:hover{border-color:var(--accent-light);transform:none;box-shadow:none}.mini-box.active,.mini-box.active-step{border-color:var(--accent);background:var(--brand-soft);box-shadow:none;transform:none}.mini-box canvas{display:block;pointer-events:none;user-select:none}.badge,.mini-box,.practice-layout{display:flex;justify-content:center}.badge{position:absolute;top:0;left:0;background:var(--accent);color:#fff;font-size:9px;font-weight:700;width:17px;height:17px;border-radius:0 0 6px 0;align-items:center;z-index:2}.practice-layout{flex-wrap:wrap;align-items:flex-start;gap:22px;padding:4px 0 8px}.reference-card{flex:0 0 auto;text-align:center}.reference-title{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:8px;letter-spacing:.3px}.reference-svg{width:min(370px,100%);aspect-ratio:1/1;border-radius:12px;overflow:hidden;background:color-mix(in srgb,var(--card) 90%,transparent);border:2px solid var(--border);box-shadow:inset 0 0 0 1px rgba(0,0,0,.02);display:flex;align-items:center;justify-content:center}.reference-svg svg{width:100%;height:100%;display:block}.practice-area{flex:0 0 auto;text-align:center}.character-tabs{display:flex;justify-content:center;gap:6px;margin-bottom:8px;flex-wrap:wrap}.char-tab{min-width:40px;height:34px;border:1px solid var(--border);border-radius:8px;background:var(--card);color:var(--muted);cursor:pointer;font-size:20px;transition:all .2s}.char-tab.active{color:var(--accent);background:var(--brand-soft)}.char-tab.active,.char-tab:hover{border-color:var(--accent-light)}.stroke-indicators{min-height:28px;display:flex;flex-wrap:wrap;justify-content:center;gap:5px;margin-bottom:9px}.stroke-dot{min-width:27px;height:27px;padding:0 6px;display:grid;place-items:center;border-radius:999px;border:1px solid var(--border);background:var(--card);color:var(--muted);font-size:11px;font-weight:700;transition:.18s ease}.stroke-dot.current{background:var(--card);color:var(--accent);border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light)}.stroke-dot.done{color:#fff;background:var(--success);border-color:var(--success)}.stroke-dot.score{min-width:28px;border-radius:5px;padding:0 7px;background:var(--card);color:var(--accent);font-variant-numeric:tabular-nums}.stroke-dot.score.low{color:#b91c1c;background:#fee2e2;border-color:#fca5a5}#hintBtn,.stroke-dot.score.medium{color:#a16207;background:#fef3c7;border-color:#fcd34d}.stroke-dot.score.high{color:#15803d;background:#dcfce7;border-color:#86efac}.status{text-align:center;min-height:24px;margin:9px 0 2px;font-size:12px;color:var(--muted)}.status.success{color:var(--success);font-weight:700}.practice-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-top:8px}.pm-btn{justify-content:center;font-size:11px;font-weight:600;transition:all .2s ease}#hintBtn{color:#b45309}[data-theme=dark] #hintBtn{color:#fbbf24;background:rgba(251,191,36,.14);border-color:rgba(251,191,36,.45)}#hintBtn:hover{background:#fde68a;transform:translateY(-1px)}#outlineBtn{color:#6d28d9;background:#ede9fe;border-color:#c4b5fd}[data-theme=dark] #outlineBtn{color:#a78bfa;background:rgba(139,116,252,.14);border-color:rgba(167,139,250,.45)}#outlineBtn:hover{background:#ddd6fe;transform:translateY(-1px)}#retryBtn{color:#be123c;background:#ffe4e6;border-color:#fda4af}[data-theme=dark] #retryBtn{color:#fb7185;background:rgba(251,113,133,.14);border-color:rgba(251,113,133,.45)}#retryBtn:hover{background:#fecdd3;transform:translateY(-1px)}.result-overlay{position:fixed;inset:0;z-index:9999;display:none;align-items:center;justify-content:center;padding:20px;background:rgba(20,18,28,.38);backdrop-filter:blur(3px)}.result-overlay.show{display:flex}.result-card{width:min(320px,100%);background:var(--card);border:1px solid var(--border);border-radius:var(--r);box-shadow:0 20px 60px rgba(0,0,0,.18);padding:24px 20px;text-align:center;position:relative}.result-card .popup-close,.stars{display:flex;align-items:center;justify-content:center}.result-card .popup-close{position:absolute;top:8px;right:8px;width:30px;height:30px}.result-card .result-actions .btn{padding:12px 18px;font-size:14px;border-radius:12px;justify-content:center}.stars{gap:3px;margin-bottom:6px}.star{width:22px;height:22px;color:#e0e0e0;fill:#e0e0e0}.star.filled{color:#f2bd42;fill:#f2bd42}.score-ring{position:relative;width:96px;height:96px;margin:8px auto;display:flex;align-items:center;justify-content:center}.score-ring svg{position:absolute;inset:0;width:100%;height:100%;transform:rotate(-90deg)}.score-ring .track{fill:transparent;stroke:var(--border);stroke-width:8}.score-ring .progress{fill:none;stroke:var(--accent);stroke-width:8;stroke-linecap:round;transition:stroke-dashoffset .4s ease}.score-number{position:relative;font-size:36px;line-height:1;font-weight:800;font-variant-numeric:tabular-nums;color:var(--accent)}.result-label{margin-top:4px;font-size:20px;font-weight:700;color:var(--accent)}.result-actions{width:100%;display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}.tutorial-overlay{position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center}.tutorial-card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);max-width:420px;width:90%;padding:30px 24px 20px;text-align:center}.tutorial-step{display:none}.tutorial-step.active{display:block}.tutorial-step h3{margin-bottom:6px;font-size:16px;color:var(--accent)}.tutorial-step p{font-size:13px;color:var(--muted);margin-bottom:12px}.tut-icon{margin:10px 0}.tut-desc{font-size:13px;color:var(--text)}.tutorial-nav{display:flex;align-items:center;justify-content:space-between;margin-top:20px;gap:10px;flex-wrap:wrap}.tut-dots{display:flex;gap:6px}.dot{width:8px;height:8px;border-radius:50%;background:var(--border);transition:background .3s}.dot.active{background:var(--accent)}.tut-skip{font-size:11px;padding:6px 10px}.popup-overlay{position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.5);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center}.popup-card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);max-width:360px;width:85%;padding:30px 24px;text-align:center;position:relative}.popup-close{position:absolute;top:8px;right:8px;background:0 0;border:0;cursor:pointer;color:var(--muted);padding:4px;border-radius:6px;display:flex;align-items:center;justify-content:center;transition:color .2s,background .2s}.popup-close:hover{color:var(--text);background:var(--border)}@media (max-width:768px){.top-inner{height:80px;padding:0 12px;gap:8px}.logo-img{width:130px!important;height:auto!important}.brand-sub{font-size:9px}.lang-option{padding:5px 10px;font-size:10px}.search{padding:10px 12px;gap:8px;border-width:2px}.search input{font-size:15px}.head .btns{padding:6px 10px}.btn{padding:6px 9px;font-size:11px}.result-card .result-actions .btn{padding:9px 12px;font-size:12px}.tab-btn h3{font-size:12px}.tab-btn h3 .tab-full{display:none}.tab-btn h3 .tab-short{display:inline}.body{padding:10px 12px}#hanzi-practice-wrap,.tianzige{width:260px;height:260px}.mini-box{width:75px;height:75px}.tianzige-wrap.all-grid{gap:12px}.reference-svg{width:min(320px,100%)}.strip{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scroll-snap-type:x proximity;padding-bottom:6px}.mini-box{flex:0 0 auto;scroll-snap-align:start}.steps-char-tabs{gap:5px}.steps-char-tab{min-width:32px;height:28px;padding:0 8px;font-size:16px}.section{margin-top:14px}}@media (max-width:420px){.top-inner{height:74px;flex-direction:row;align-items:center}.brand{flex-shrink:1;min-width:0}.brand-sub{font-size:8px}.controls{gap:6px}.lang-option{padding:4px 8px;font-size:9px}.tab-btn{padding:10px 8px 8px}.tab-btn h3{font-size:11px}.head .btns{padding:4px 8px;gap:4px}.btn{padding:5px 7px;font-size:10px}#hanzi-practice-wrap,.tianzige{width:220px;height:220px}.mini-box{width:75px;height:75px}.badge{width:14px;height:14px;font-size:7px}.logo-img{width:110px!important;height:auto!important}.tianzige-wrap.all-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.tianzige-wrap.all-grid .tianzige{border-width:2px;border-radius:6px}.reference-svg{width:min(280px,100%)}.speed-box{padding:10px 12px;gap:8px;font-size:12px}}