*,:before,:after,::backdrop{--tw-border-spacing-x:0;--tw-border-spacing-y:0;--tw-translate-x:0;--tw-translate-y:0;--tw-rotate:0;--tw-skew-x:0;--tw-skew-y:0;--tw-scale-x:1;--tw-scale-y:1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness:proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-color:#3b82f680;--tw-ring-offset-shadow:0 0 #0000;--tw-ring-shadow:0 0 #0000;--tw-shadow:0 0 #0000;--tw-shadow-colored:0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }*,:before,:after{box-sizing:border-box;border:0 solid #e5e7eb}:before,:after{--tw-content:""}html,:host{-webkit-text-size-adjust:100%;tab-size:4;font-feature-settings:normal;font-variation-settings:normal;-webkit-tap-highlight-color:transparent;font-family:ui-sans-serif,system-ui,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji;line-height:1.5}body{line-height:inherit;margin:0}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-feature-settings:normal;font-variation-settings:normal;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}button,input,optgroup,select,textarea{font-feature-settings:inherit;font-variation-settings:inherit;font-family:inherit;font-size:100%;font-weight:inherit;line-height:inherit;letter-spacing:inherit;color:inherit;margin:0;padding:0}button,select{text-transform:none}button,input:where([type=button]),input:where([type=reset]),input:where([type=submit]){-webkit-appearance:button;background-color:#0000;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dl,dd,h1,h2,h3,h4,h5,h6,hr,figure,p,pre{margin:0}fieldset{margin:0;padding:0}legend{padding:0}ol,ul,menu{margin:0;padding:0;list-style:none}dialog{padding:0}textarea{resize:vertical}input::-moz-placeholder{opacity:1;color:#9ca3af}textarea::-moz-placeholder{opacity:1;color:#9ca3af}input::placeholder,textarea::placeholder{opacity:1;color:#9ca3af}button,[role=button]{cursor:pointer}:disabled{cursor:default}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}[hidden]:where(:not([hidden=until-found])){display:none}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.pointer-events-none{pointer-events:none}.visible{visibility:visible}.fixed{position:fixed}.relative{position:relative}.sticky{position:sticky}.bottom-3{bottom:.75rem}.left-1\/2{left:50%}.top-0{top:0}.z-40{z-index:40}.z-50{z-index:50}.mx-auto{margin-left:auto;margin-right:auto}.mb-3{margin-bottom:.75rem}.mb-4{margin-bottom:1rem}.mb-5{margin-bottom:1.25rem}.mt-1{margin-top:.25rem}.mt-2{margin-top:.5rem}.mt-3{margin-top:.75rem}.mt-4{margin-top:1rem}.mt-5{margin-top:1.25rem}.mt-6{margin-top:1.5rem}.block{display:block}.flex{display:flex}.inline-flex{display:inline-flex}.grid{display:grid}.hidden{display:none}.h-10{height:2.5rem}.h-11{height:2.75rem}.h-14{height:3.5rem}.h-2{height:.5rem}.h-6{height:1.5rem}.h-7{height:1.75rem}.h-9{height:2.25rem}.h-full{height:100%}.min-h-72{min-height:18rem}.min-h-\[60vh\]{min-height:60vh}.min-h-screen{min-height:100vh}.w-10{width:2.5rem}.w-12{width:3rem}.w-16{width:4rem}.w-6{width:1.5rem}.w-9{width:2.25rem}.w-full{width:100%}.min-w-0{min-width:0}.max-w-2xl{max-width:42rem}.max-w-4xl{max-width:56rem}.max-w-5xl{max-width:64rem}.max-w-7xl{max-width:80rem}.max-w-xl{max-width:36rem}.flex-none{flex:none}.shrink-0{flex-shrink:0}.-translate-x-1\/2{--tw-translate-x:-50%;transform:translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.translate-x-0\.5{--tw-translate-x:.125rem;transform:translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.transform{transform:translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.resize{resize:both}.grid-cols-\[1fr_auto_1fr\]{grid-template-columns:1fr auto 1fr}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}.place-items-center{place-items:center}.items-start{align-items:flex-start}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-0\.5{gap:.125rem}.gap-1{gap:.25rem}.gap-1\.5{gap:.375rem}.gap-2{gap:.5rem}.gap-3{gap:.75rem}.gap-4{gap:1rem}.gap-6{gap:1.5rem}.space-y-3>:not([hidden])~:not([hidden]){--tw-space-y-reverse:0;margin-top:calc(.75rem * calc(1 - var(--tw-space-y-reverse)));margin-bottom:calc(.75rem * var(--tw-space-y-reverse))}.space-y-5>:not([hidden])~:not([hidden]){--tw-space-y-reverse:0;margin-top:calc(1.25rem * calc(1 - var(--tw-space-y-reverse)));margin-bottom:calc(1.25rem * var(--tw-space-y-reverse))}.space-y-6>:not([hidden])~:not([hidden]){--tw-space-y-reverse:0;margin-top:calc(1.5rem * calc(1 - var(--tw-space-y-reverse)));margin-bottom:calc(1.5rem * var(--tw-space-y-reverse))}.justify-self-start{justify-self:start}.justify-self-end{justify-self:end}.overflow-hidden{overflow:hidden}.rounded{border-radius:.25rem}.rounded-full{border-radius:9999px}.rounded-lg{border-radius:.5rem}.rounded-md{border-radius:.375rem}.rounded-xl{border-radius:.75rem}.border{border-width:1px}.border-b{border-bottom-width:1px}.border-\[\#343a47\]{--tw-border-opacity:1;border-color:rgb(52 58 71/var(--tw-border-opacity,1))}.border-\[\#e85b8a\]{--tw-border-opacity:1;border-color:rgb(232 91 138/var(--tw-border-opacity,1))}.border-\[\#ffd1c7\]{--tw-border-opacity:1;border-color:rgb(255 209 199/var(--tw-border-opacity,1))}.border-slate-100{--tw-border-opacity:1;border-color:rgb(241 245 249/var(--tw-border-opacity,1))}.border-slate-200{--tw-border-opacity:1;border-color:rgb(226 232 240/var(--tw-border-opacity,1))}.border-slate-200\/80{border-color:#e2e8f0cc}.bg-\[\#20242d\]{--tw-bg-opacity:1;background-color:rgb(32 36 45/var(--tw-bg-opacity,1))}.bg-\[\#25d6a2\]{--tw-bg-opacity:1;background-color:rgb(37 214 162/var(--tw-bg-opacity,1))}.bg-\[\#262b35\]{--tw-bg-opacity:1;background-color:rgb(38 43 53/var(--tw-bg-opacity,1))}.bg-\[\#e6fbf4\]{--tw-bg-opacity:1;background-color:rgb(230 251 244/var(--tw-bg-opacity,1))}.bg-\[\#e7f0ff\]{--tw-bg-opacity:1;background-color:rgb(231 240 255/var(--tw-bg-opacity,1))}.bg-\[\#f7f8f4\]{--tw-bg-opacity:1;background-color:rgb(247 248 244/var(--tw-bg-opacity,1))}.bg-\[\#ffe9e3\]{--tw-bg-opacity:1;background-color:rgb(255 233 227/var(--tw-bg-opacity,1))}.bg-\[\#fff2ef\]{--tw-bg-opacity:1;background-color:rgb(255 242 239/var(--tw-bg-opacity,1))}.bg-\[\#fff4cc\]{--tw-bg-opacity:1;background-color:rgb(255 244 204/var(--tw-bg-opacity,1))}.bg-slate-100{--tw-bg-opacity:1;background-color:rgb(241 245 249/var(--tw-bg-opacity,1))}.bg-slate-200{--tw-bg-opacity:1;background-color:rgb(226 232 240/var(--tw-bg-opacity,1))}.bg-slate-50{--tw-bg-opacity:1;background-color:rgb(248 250 252/var(--tw-bg-opacity,1))}.bg-slate-50\/70{background-color:#f8fafcb3}.bg-slate-950{--tw-bg-opacity:1;background-color:rgb(2 6 23/var(--tw-bg-opacity,1))}.bg-white{--tw-bg-opacity:1;background-color:rgb(255 255 255/var(--tw-bg-opacity,1))}.bg-white\/20{background-color:#fff3}.bg-white\/95{background-color:#fffffff2}.fill-\[\#ffcc3d\]{fill:#ffcc3d}.fill-slate-100{fill:#f1f5f9}.p-1{padding:.25rem}.p-4{padding:1rem}.p-5{padding:1.25rem}.p-6{padding:1.5rem}.p-8{padding:2rem}.px-1\.5{padding-left:.375rem;padding-right:.375rem}.px-3{padding-left:.75rem;padding-right:.75rem}.px-4{padding-left:1rem;padding-right:1rem}.px-5{padding-left:1.25rem;padding-right:1.25rem}.px-6{padding-left:1.5rem;padding-right:1.5rem}.py-0\.5{padding-top:.125rem;padding-bottom:.125rem}.py-1{padding-top:.25rem;padding-bottom:.25rem}.py-2{padding-top:.5rem;padding-bottom:.5rem}.py-2\.5{padding-top:.625rem;padding-bottom:.625rem}.py-3{padding-top:.75rem;padding-bottom:.75rem}.py-4{padding-top:1rem;padding-bottom:1rem}.py-6{padding-top:1.5rem;padding-bottom:1.5rem}.text-center{text-align:center}.text-right{text-align:right}.font-mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace}.text-2xl{font-size:1.5rem;line-height:2rem}.text-3xl{font-size:1.875rem;line-height:2.25rem}.text-4xl{font-size:2.25rem;line-height:2.5rem}.text-\[10px\]{font-size:10px}.text-\[11px\]{font-size:11px}.text-\[13px\]{font-size:13px}.text-base{font-size:1rem;line-height:1.5rem}.text-lg{font-size:1.125rem;line-height:1.75rem}.text-sm{font-size:.875rem;line-height:1.25rem}.text-xl{font-size:1.25rem;line-height:1.75rem}.text-xs{font-size:.75rem;line-height:1rem}.font-black{font-weight:900}.font-bold{font-weight:700}.font-medium{font-weight:500}.font-semibold{font-weight:600}.uppercase{text-transform:uppercase}.leading-6{line-height:1.5rem}.leading-7{line-height:1.75rem}.leading-none{line-height:1}.leading-tight{line-height:1.25}.tracking-normal{letter-spacing:0}.tracking-wide{letter-spacing:.025em}.text-\[\#0f8f6e\]{--tw-text-opacity:1;color:rgb(15 143 110/var(--tw-text-opacity,1))}.text-\[\#285bb9\]{--tw-text-opacity:1;color:rgb(40 91 185/var(--tw-text-opacity,1))}.text-\[\#787f91\]{--tw-text-opacity:1;color:rgb(120 127 145/var(--tw-text-opacity,1))}.text-\[\#8a5a00\]{--tw-text-opacity:1;color:rgb(138 90 0/var(--tw-text-opacity,1))}.text-\[\#8f96a7\]{--tw-text-opacity:1;color:rgb(143 150 167/var(--tw-text-opacity,1))}.text-\[\#a46d00\]{--tw-text-opacity:1;color:rgb(164 109 0/var(--tw-text-opacity,1))}.text-\[\#b8462b\]{--tw-text-opacity:1;color:rgb(184 70 43/var(--tw-text-opacity,1))}.text-\[\#be3d24\]{--tw-text-opacity:1;color:rgb(190 61 36/var(--tw-text-opacity,1))}.text-\[\#e4a400\]{--tw-text-opacity:1;color:rgb(228 164 0/var(--tw-text-opacity,1))}.text-\[\#e85b8a\]{--tw-text-opacity:1;color:rgb(232 91 138/var(--tw-text-opacity,1))}.text-slate-100{--tw-text-opacity:1;color:rgb(241 245 249/var(--tw-text-opacity,1))}.text-slate-300{--tw-text-opacity:1;color:rgb(203 213 225/var(--tw-text-opacity,1))}.text-slate-400{--tw-text-opacity:1;color:rgb(148 163 184/var(--tw-text-opacity,1))}.text-slate-500{--tw-text-opacity:1;color:rgb(100 116 139/var(--tw-text-opacity,1))}.text-slate-600{--tw-text-opacity:1;color:rgb(71 85 105/var(--tw-text-opacity,1))}.text-slate-700{--tw-text-opacity:1;color:rgb(51 65 85/var(--tw-text-opacity,1))}.text-slate-950{--tw-text-opacity:1;color:rgb(2 6 23/var(--tw-text-opacity,1))}.text-transparent{color:#0000}.text-white{--tw-text-opacity:1;color:rgb(255 255 255/var(--tw-text-opacity,1))}.opacity-75{opacity:.75}.shadow{--tw-shadow:0 1px 3px 0 #0000001a, 0 1px 2px -1px #0000001a;--tw-shadow-colored:0 1px 3px 0 var(--tw-shadow-color), 0 1px 2px -1px var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow,0 0 #0000), var(--tw-ring-shadow,0 0 #0000), var(--tw-shadow)}.shadow-md{--tw-shadow:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--tw-shadow-colored:0 4px 6px -1px var(--tw-shadow-color), 0 2px 4px -2px var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow,0 0 #0000), var(--tw-ring-shadow,0 0 #0000), var(--tw-shadow)}.shadow-sm{--tw-shadow:0 1px 2px 0 #0000000d;--tw-shadow-colored:0 1px 2px 0 var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow,0 0 #0000), var(--tw-ring-shadow,0 0 #0000), var(--tw-shadow)}.shadow-xl{--tw-shadow:0 20px 25px -5px #0000001a, 0 8px 10px -6px #0000001a;--tw-shadow-colored:0 20px 25px -5px var(--tw-shadow-color), 0 8px 10px -6px var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow,0 0 #0000), var(--tw-ring-shadow,0 0 #0000), var(--tw-shadow)}.blur{--tw-blur:blur(8px);filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}.drop-shadow-sm{--tw-drop-shadow:drop-shadow(0 1px 1px #0000000d);filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}.filter{filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}.backdrop-blur{--tw-backdrop-blur:blur(8px);-webkit-backdrop-filter:var(--tw-backdrop-blur) var(--tw-backdrop-brightness) var(--tw-backdrop-contrast) var(--tw-backdrop-grayscale) var(--tw-backdrop-hue-rotate) var(--tw-backdrop-invert) var(--tw-backdrop-opacity) var(--tw-backdrop-saturate) var(--tw-backdrop-sepia);backdrop-filter:var(--tw-backdrop-blur) var(--tw-backdrop-brightness) var(--tw-backdrop-contrast) var(--tw-backdrop-grayscale) var(--tw-backdrop-hue-rotate) var(--tw-backdrop-invert) var(--tw-backdrop-opacity) var(--tw-backdrop-saturate) var(--tw-backdrop-sepia)}.transition{transition-property:color,background-color,border-color,text-decoration-color,fill,stroke,opacity,box-shadow,transform,filter,-webkit-backdrop-filter,backdrop-filter;transition-duration:.15s;transition-timing-function:cubic-bezier(.4,0,.2,1)}:root{color:#0f172a;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f7f8f4;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}::selection{background:#b8f4d6}.mascot-wrap{justify-items:center;gap:.5rem;display:grid}.mascot-svg{filter:drop-shadow(0 12px 24px #0f172a1f);width:112px;height:112px}.mascot-sm .mascot-svg{width:74px;height:74px}.mascot-lg .mascot-svg{width:176px;height:176px}.mascot-bubble{color:#475569;text-align:center;background:#fff;border:1px solid #e2e8f0;border-radius:.5rem;max-width:12rem;padding:.5rem .75rem;font-size:.8125rem;font-weight:800;line-height:1.3;box-shadow:0 8px 20px #0f172a14}.mascot-celebrate .mascot-svg{animation:.9s both mascot-pop}.mascot-combo .mascot-svg{animation:.9s both mascot-wiggle}.feedback-toast{animation:1.6s both toast-rise}.lesson-feedback-stack{width:min(13.5rem,100vw - 2rem);bottom:3.25rem;right:1.25rem}.practice-stage{position:relative;overflow:hidden}.practice-stage:before{content:"";pointer-events:none;background-color:#0000;background-image:linear-gradient(90deg,#25d6a214 1px,#0000 1px),linear-gradient(#25d6a214 1px,#0000 1px);background-position:0 0,0 0;background-repeat:repeat,repeat;background-size:34px 34px;background-attachment:scroll,scroll;background-origin:padding-box,padding-box;background-clip:border-box,border-box;position:absolute;inset:0;-webkit-mask-image:linear-gradient(#000,#0000 65%);mask-image:linear-gradient(#000,#0000 65%)}.lesson-typing-shell{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;background:radial-gradient(circle at 50% -20%,#3d43525c,#0000 34rem),linear-gradient(#20242d 0%,#1f232b 100%);min-height:100vh;position:relative}.lesson-typing-toolbar{color:#767e91}.lesson-tool-button{color:#767e91;min-width:0;font:inherit;white-space:nowrap;background:0 0;border:0;align-items:center;gap:.38rem;padding:0;line-height:1;transition:color .16s,transform .16s;display:inline-flex}.lesson-tool-button:hover,.lesson-tool-button:focus-visible{color:#c8ceda;outline:none}.lesson-tool-button:active{transform:translateY(1px)}.lesson-toolbar-actions{justify-content:flex-end;align-items:center;gap:clamp(.9rem,2.2vw,1.6rem);display:flex}.lesson-typing-main{grid-template-rows:minmax(25rem,1fr) auto;min-height:calc(100vh - 3.5rem);display:grid}.lesson-word-board{-moz-column-gap:clamp(2.1rem, 3.4vw, 3.2rem);flex-wrap:wrap;place-content:flex-start center;align-self:start;gap:clamp(2.35rem,4vw,4.2rem) clamp(2.1rem,3.4vw,3.2rem);width:min(78rem,100vw - 2rem);margin:clamp(4rem,9.5vh,6.6rem) auto 0;padding:0 .5rem;display:flex}.lesson-word-board.is-pinyin-board{-moz-column-gap:clamp(3.8rem, 6vw, 7.7rem);flex-wrap:wrap;align-content:flex-start;align-items:flex-start;gap:clamp(3.35rem,7.4vh,6.8rem) clamp(3.8rem,6vw,7.7rem);width:min(92rem,100vw - 2rem);min-height:clamp(15rem,39vh,24rem);overflow:visible}.lesson-word-token{--lesson-pinyin-size:clamp(1.85rem, 2.6vw, 2.8rem);--lesson-char-slot:calc(var(--lesson-pinyin-size) * .82);--lesson-syllable-gap:clamp(.45rem, .75vw, .8rem);width:max(4.75rem, calc(var(--lesson-token-chars,3) * var(--lesson-char-slot) + var(--lesson-token-gaps,0) * var(--lesson-syllable-gap) + 1rem));min-width:max(4.75rem, calc(var(--lesson-token-chars,3) * var(--lesson-char-slot) + var(--lesson-token-gaps,0) * var(--lesson-syllable-gap) + 1rem));color:#7f8799;opacity:.82;flex:none;justify-items:center;gap:.36rem;display:grid}.lesson-word-board.is-pinyin-board .lesson-word-token{--lesson-pinyin-size:clamp(2.55rem, 4.45vw, 4.15rem);--lesson-char-slot:calc(var(--lesson-pinyin-size) * .72);width:max(6.5rem, calc(var(--lesson-token-chars,2) * var(--lesson-char-slot) + 1.55rem));min-width:max(6.5rem, calc(var(--lesson-token-chars,2) * var(--lesson-char-slot) + 1.55rem));gap:0}.lesson-word-token.is-active,.lesson-word-token.is-completed{opacity:1}.lesson-word-pinyin{width:100%;min-width:0;min-height:2.15rem;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace;font-size:var(--lesson-pinyin-size);letter-spacing:0;text-align:center;white-space:nowrap;color:#8991a3;justify-content:center;align-items:baseline;font-weight:800;line-height:1;display:flex;overflow:visible}.lesson-word-board.is-pinyin-board .lesson-word-pinyin{min-height:calc(var(--lesson-pinyin-size) * 1.25)}.lesson-word-hanzi{letter-spacing:0;text-align:center;color:#868e9f;width:100%;min-height:2.4rem;font-size:clamp(2.2rem,3vw,3.35rem);font-weight:900;line-height:1}.lesson-word-hanzi .is-typed{color:#f2f5fb;text-shadow:0 0 16px #f2f5fb24}.lesson-word-pinyin>span{width:var(--lesson-char-slot);min-width:var(--lesson-char-slot);text-align:center;vertical-align:baseline;box-sizing:border-box;border-radius:.125rem;place-items:center;display:inline-grid}.lesson-word-pinyin>.lesson-syllable-gap{width:var(--lesson-syllable-gap);min-width:var(--lesson-syllable-gap);pointer-events:none}.lesson-char-current{color:#f4f6fb;background:linear-gradient(#9aa1af,#747b89)}.lesson-char-pending{color:#858d9f}.lesson-char-correct{color:#35c39b}.lesson-char-corrected{color:#f2c15a}.lesson-char-wrong{color:#ff8b95;background:#7c313db8}.lesson-bottom-panel{border-top:1px solid #454b5aad;grid-template-columns:1fr;align-items:end;min-height:clamp(13rem,27vh,20rem);padding:clamp(.9rem,1.7vh,1.45rem) clamp(.75rem,2vw,2rem) 1.8rem;display:grid}.lesson-keyboard-wrap{width:min(42rem,100vw - 2rem);margin:0 auto}.lesson-bottom-panel .keyboard-guide{background:linear-gradient(#242832e6,#1f232cf5),repeating-linear-gradient(90deg,#77809729 0 1px,#0000 1px 44px),repeating-linear-gradient(0deg,#7780971f 0 1px,#0000 1px 44px);border-color:#4d5465bd;box-shadow:inset 0 1px #ffffff0a,0 14px 40px #0000001f}.lesson-bottom-panel .keyboard-guide__keyboard,.lesson-bottom-panel .keyboard-guide__hand{opacity:.42}.lesson-bottom-panel .keyboard-guide__hand{opacity:.34}.lesson-stats{color:#737b8d;flex-wrap:wrap;justify-content:flex-end;gap:.9rem;max-width:min(48rem,100vw - 4rem);font-size:clamp(.62rem,.72vw,.72rem);font-weight:800;line-height:1.2;display:flex;position:absolute;bottom:1.72rem;right:2rem}.lesson-stats strong{color:#b6bdcc;font-size:1.08em}.lesson-progress-track{background:#464d5f;border-radius:999px;height:.28rem;position:fixed;bottom:.65rem;left:.85rem;right:.85rem;overflow:hidden}.lesson-progress-bar{border-radius:inherit;background:#25d6a2;height:100%;transition-property:width}.keyboard-guide{aspect-ratio:1031/383;background:linear-gradient(#f8fafceb,#f5f7fcfa),repeating-linear-gradient(90deg,#d6dce87a 0 1px,#0000 1px 44px),repeating-linear-gradient(0deg,#d6dce857 0 1px,#0000 1px 44px);border:1px solid #d9dde7;border-radius:.5rem;width:100%;min-width:0;position:relative;overflow:hidden;box-shadow:inset 0 1px #ffffffbf}.keyboard-guide:after{content:"";pointer-events:none;background:linear-gradient(#ffffff05,#ffffff1f);position:absolute;inset:0}.keyboard-guide__viewport{place-items:center;display:grid;position:absolute;inset:0;overflow:visible}.keyboard-guide__typing-block{transform-origin:50%;pointer-events:none;width:1031px;height:383px;position:absolute;top:50%;left:50%}.keyboard-guide__keyboard{image-rendering:auto;shape-rendering:geometricprecision;width:100%;height:100%;position:absolute;top:0;left:0}.keyboard-guide__keyboard svg,.keyboard-guide__hand svg{width:100%;height:100%;display:block}.keyboard-guide__keyboard svg{overflow:visible}.keyboard-guide__keyboard svg text{font-family:Arial,Helvetica,sans-serif}.keyboard-guide__hand{top:var(--hand-top);opacity:.8;pointer-events:none;width:100%;height:100%;transform:translate(var(--hand-offset-x), var(--hand-offset-y)) scale(2.2);position:absolute;left:0}@keyframes mascot-pop{0%{transform:translateY(0)scale(.96)}45%{transform:translateY(-10px)scale(1.05)}to{transform:translateY(0)scale(1)}}@keyframes mascot-wiggle{0%,to{transform:rotate(0)}25%{transform:rotate(-4deg)}50%{transform:rotate(4deg)}75%{transform:rotate(-2deg)}}@keyframes toast-rise{0%{opacity:0;transform:translateY(14px)scale(.96)}12%,82%{opacity:1;transform:translateY(0)scale(1)}to{opacity:0;transform:translateY(-8px)scale(.98)}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@media (width<=900px){.lesson-typing-toolbar{grid-template-columns:auto 1fr auto;gap:.75rem;padding:1rem}.lesson-toolbar-actions{gap:1rem}.lesson-typing-main{min-height:calc(100vh - 3.5rem)}.lesson-word-board{gap:1.6rem 2rem;width:min(36rem,100vw - 1.5rem);margin-top:3rem}.lesson-word-board.is-pinyin-board{-moz-column-gap:2.65rem;gap:2.5rem 2.65rem;width:min(42rem,100vw - 1.5rem)}.lesson-bottom-panel{min-height:13.5rem;padding-bottom:4.25rem}.lesson-stats{justify-content:center;max-width:none;bottom:1.55rem;left:1rem;right:1rem}.lesson-feedback-stack{width:min(12rem,100vw - 1.5rem);bottom:5rem;right:.75rem}}@media (width<=560px){.lesson-tool-button{font-size:.75rem}.lesson-typing-toolbar{padding-inline:.75rem}.lesson-toolbar-actions{gap:.62rem}.lesson-toolbar-actions .lesson-tool-button{gap:.25rem}.lesson-toolbar-actions .lesson-tool-button svg{width:.88rem;height:.88rem}.lesson-word-board{-moz-column-gap:1.2rem;gap:1.35rem 1.2rem;margin-top:2.4rem}.lesson-word-token{--lesson-pinyin-size:1.18rem;--lesson-char-slot:calc(var(--lesson-pinyin-size) * .82);width:max(3.4rem, calc(var(--lesson-token-chars,3) * var(--lesson-char-slot) + .6rem));min-width:max(3.4rem, calc(var(--lesson-token-chars,3) * var(--lesson-char-slot) + .6rem))}.lesson-word-board.is-pinyin-board .lesson-word-token{--lesson-pinyin-size:clamp(1.45rem, 7.8vw, 2.25rem);--lesson-char-slot:calc(var(--lesson-pinyin-size) * .72);width:max(3.85rem, calc(var(--lesson-token-chars,2) * var(--lesson-char-slot) + .9rem));min-width:max(3.85rem, calc(var(--lesson-token-chars,2) * var(--lesson-char-slot) + .9rem))}.lesson-word-pinyin{font-size:var(--lesson-pinyin-size)}.lesson-word-hanzi{font-size:1.48rem}.lesson-bottom-panel{min-height:12.5rem}}.hover\:border-slate-300:hover{--tw-border-opacity:1;border-color:rgb(203 213 225/var(--tw-border-opacity,1))}.hover\:bg-\[\#1fb98e\]:hover{--tw-bg-opacity:1;background-color:rgb(31 185 142/var(--tw-bg-opacity,1))}.hover\:bg-slate-50:hover{--tw-bg-opacity:1;background-color:rgb(248 250 252/var(--tw-bg-opacity,1))}.hover\:bg-slate-800:hover{--tw-bg-opacity:1;background-color:rgb(30 41 59/var(--tw-bg-opacity,1))}.hover\:text-slate-950:hover{--tw-text-opacity:1;color:rgb(2 6 23/var(--tw-text-opacity,1))}.data-\[state\=checked\]\:translate-x-\[22px\][data-state=checked]{--tw-translate-x:22px;transform:translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.data-\[state\=checked\]\:bg-\[\#25d6a2\][data-state=checked]{--tw-bg-opacity:1;background-color:rgb(37 214 162/var(--tw-bg-opacity,1))}@media (width>=640px){.sm\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.sm\:p-8{padding:2rem}.sm\:px-6{padding-left:1.5rem;padding-right:1.5rem}.sm\:text-5xl{font-size:3rem;line-height:1}}@media (width>=768px){.md\:flex{display:flex}.md\:hidden{display:none}.md\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.md\:flex-row{flex-direction:row}.md\:items-center{align-items:center}.md\:justify-between{justify-content:space-between}}@media (width>=1024px){.lg\:grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.lg\:grid-cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.lg\:grid-cols-\[1fr_260px\]{grid-template-columns:1fr 260px}.lg\:grid-cols-\[1fr_360px\]{grid-template-columns:1fr 360px}}@media (width>=1280px){.xl\:grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}}