:root{--ink:#233c30;--muted:#7a8477;--green:#2e624a;--light:#e8efde;--cream:#f7f7ef;--line:#e6e8dc;--orange:#db8f48;--serif:ui-serif,"Songti SC","STSong",serif}*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:15px}button,input,textarea,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button{color:inherit}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #bd933d;outline-offset:4px}button:disabled{cursor:not-allowed;opacity:.45}button{border:0}button:hover:not(:disabled),a:hover{filter:brightness(.97)}.site-header{height:104px;max-width:1224px;padding:0 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var(--line);border-radius:18px;padding:25px}.card-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:21px}.card-head h2,.section-head h2{font-size:17px;margin:0;font-weight:650;letter-spacing:.5px}.card-head small{color:var(--muted);font-size:11px}.lesson-heading{display:flex;gap:13px;align-items:center}.lesson-icon{background:#eaf0dc;border:1px solid #e0e8d2;border-radius:14px;display:grid;place-items:center;width:54px;height:54px;font-size:27px}.lesson-heading h3{font-size:18px;margin:3px 0 6px}.lesson-heading p{font-size:12px;margin:0;color:#87917f}.lesson-heading .eyebrow{font-size:10px;letter-spacing:1px}.step-row{display:flex;align-items:center;gap:9px;margin:23px 0}.step{flex:1;border-radius:8px;background:#f2f3e9;padding:12px 8px;text-align:center;color:#89977e;font-size:11px;border:1px solid #e8ebdf}.step.done{background:#e5eed9;border-color:#d5e2c7;color:#4d7043}.step.current{background:#f8efdc;border-color:#eadbb5;color:#997332}.step 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- 32px);border:1px solid var(--line);border-radius:22px;padding:29px;background:#fffdf8;color:var(--ink);box-shadow:0 20px 100px #213d3025}dialog::backdrop{background:#1d352960;backdrop-filter:blur(3px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.dialog-head h2{margin:0;font-size:20px}.close{background:#f1f3e8;width:32px;height:32px;border-radius:50%;font-size:20px}dialog p,dialog li{font-size:13px;color:#7e8c70;line-height:1.9}dialog ol{padding-left:24px}dialog label{font-size:13px;display:block;margin:24px 0 12px}.choice-row{display:flex;gap:10px}.choice-row button{flex:1;padding:13px;border:1px solid #dce4d0;background:#f4f6ed;border-radius:10px;font-size:13px}.choice-row button.selected{background:var(--green);color:white}.dialog-separator{border:0;border-top:1px solid var(--line);margin:22px 0}.file-label{padding:11px 17px;border:1px solid #e0e6d5;background:#f1f4e9;border-radius:10px;cursor:pointer;margin:0!important}.backup-actions{display:flex;gap:9px}.file-label input{display:none}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%) translateY(15px);background:#294e3f;color:white;padding:12px 21px;border-radius:12px;box-shadow:0 5px 25px #243e3020;opacity:0;pointer-events:none;transition:all .25s;z-index:5;font-size:13px;max-width:90vw;text-align:center}.toast.visible{opacity:1;transform:translateX(-50%) translateY(0)}.storage-error{background:#fff0dc;padding:12px;border:1px solid #e6c99f;border-radius:8px;font-size:12px;color:#99703c;margin-bottom:15px}.plan-explainer{font-size:12px;line-height:1.9;color:#829174}.muted{color:var(--muted)}.mobile-text{display:none}@media(min-width:1500px){main{margin-top:25px}.hero{min-height:354px}}@media(max-width:1240px){main,footer{margin-left:32px;margin-right:32px}.site-header{padding:0 32px}.hero-content{width:60%}}@media(max-width:900px){.site-header{height:90px}.brand{font-size:20px}.brand small{font-size:9px;letter-spacing:0}nav{gap:21px}.parent-button{font-size:0}.parent-button span{font-size:22px}.dashboard-columns{grid-template-columns:1.4fr 1fr}.hero-content{padding:32px;width:65%}.hero h2{font-size:31px}.hero-note{right:20px;font-size:10px}.stat{padding:0 12px}.stat-symbol{display:none}.levels-grid{grid-template-columns:repeat(4,1fr)}.records-grid{grid-template-columns:1fr}.card{padding:21px}.mini-metrics{gap:18px}}@media(max-width:640px){.site-header{padding:18px 20px 0;flex-wrap:wrap;height:112px;gap:8px}.brand{font-size:21px}.brand-icon{width:36px;height:36px;border-radius:11px}.brand small{font-size:9px;letter-spacing:1px}nav{order:3;width:100%;height:45px;justify-content:center;gap:45px;font-size:13px}.parent-button{padding:8px}.page-intro{align-items:start;margin-top:20px}.page-intro h1{font-size:25px}.page-intro p{font-size:11px;line-height:1.8}.date-chip{font-size:10px;padding-top:13px;white-space:nowrap}.date-chip .date-year{display:none}main{margin:18px 18px 35px}.hero{min-height:405px;border-radius:18px}.hero-art{object-position:65% bottom;height:245px;top:auto;width:150%;max-width:none;left:-50%;object-fit:cover}.hero-content{padding:24px;width:100%;background:linear-gradient(#e8eedb 55%,#e8eedb00)}.hero h2{font-size:29px;margin:13px 0 8px}.hero p{font-size:12px;margin-bottom:16px}.hero-note{bottom:14px;right:15px;padding:8px 12px}.hero .primary{padding:12px 20px;gap:18px}.stats-strip{grid-template-columns:repeat(2,1fr);padding:16px 0;row-gap:20px;margin-bottom:20px}.stat{padding:0 20px;gap:8px}.stat-symbol{display:flex;width:33px;height:33px;font-size:16px;border-radius:10px}.stat:nth-child(2){border:0}.stat strong{font-size:21px}.stat label{font-size:10px}.dashboard-columns{grid-template-columns:1fr;gap:17px}.card{padding:22px}.wide-quote{font-size:11px;line-height:1.8;padding:14px;align-items:start}.wide-quote .leaf{font-size:20px}.levels-grid{grid-template-columns:repeat(2,1fr);gap:11px}.level-card{min-height:150px}.chapter-tabs{flex-wrap:nowrap;overflow-x:auto;padding:3px 0 10px}.chapter-tab{flex-shrink:0}.map-banner{padding:21px}.map-banner h2{font-size:23px}.map-banner p{font-size:11px;line-height:1.8}.map-banner .big-icon{font-size:40px}.practice-card{padding:19px 15px}.practice-top h1{font-size:19px}.practice-top .secondary{padding:9px;font-size:11px}.practice-meta{font-size:10px;gap:8px}.toggle{font-size:11px;padding:8px}.glyph{font-size:24px;width:calc(100% / 5);padding:5px 0}.glyph .pinyin{font-size:11px}.target{gap:6px 0;padding-top:18px}.typing-input{font-size:20px;padding:13px;min-height:100px}.input-label{font-size:10px}.practice-bottom{align-items:stretch;flex-direction:column}.mini-metrics{justify-content:space-around;text-align:center}.ime-guide{font-size:10px;gap:6px;flex-wrap:wrap}.ime-guide code{font-size:10px}.success{padding:27px 18px;margin:25px auto}.success h1{font-size:26px}.success-actions{flex-direction:column}.success-stats{gap:30px}.success p{font-size:13px}footer{margin:0 20px;padding:20px 0;flex-wrap:wrap;justify-content:center;font-size:9px;gap:12px}footer>span:last-child{display:none}.week-bars{gap:9px}.dialog-head h2{font-size:18px}.backup-actions{flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}} 
/* Each model character has its own writing cell; IME words flow across cells. */
.target{gap:16px 9px;padding:25px 0 20px;align-items:start}.glyph{width:calc((100% - 81px)/10);padding:8px 3px 7px;border:1px solid transparent}.glyph .model-char{font-size:26px;line-height:1.55}.glyph .pinyin{font-size:11px;line-height:1.5;min-height:18px}.char-input{width:100%;min-width:0;height:48px;background:#fafbf5;border:1.5px solid #d9e2ca;border-radius:8px;color:#365d43;text-align:center;font:25px/1.3 "PingFang SC","Microsoft YaHei",sans-serif;padding:4px 0;caret-color:#477b42;outline:0;margin-top:7px;appearance:none}.char-input::placeholder{color:#c6d2b6}.char-input:focus{border-color:#6c9251;background:#fffef7;box-shadow:0 0 0 3px #dce8c6;outline:0}.glyph.focused{background:#f1f4e7}.glyph.correct{background:#edf3e4}.glyph.correct .char-input{background:#e5efd9;border-color:#b6cca0;color:#527d3e}.glyph.wrong .char-input,.char-input.invalid{background:#fff1e9;border-color:#dc9e88;color:#ac5239}.glyph.cursor{box-shadow:none}.glyph .char-input:focus{border-color:#729a50}.practice-card{padding:25px 30px}.practice-bottom{position:static}.input-label{line-height:1.7}.typing-input{display:none}@media(max-width:640px){.target{gap:10px 6px;padding-top:18px}.glyph{width:calc((100% - 24px)/5);padding:5px 3px}.glyph .model-char{font-size:25px}.glyph .pinyin{font-size:11px}.char-input{height:43px;font-size:23px;margin-top:5px}.practice-card{padding:18px 12px}.input-label{flex-wrap:wrap}}
.model-char{position:relative}.punctuation{position:absolute;left:100%;top:0;font-size:15px;color:#889b76;line-height:2.4;white-space:nowrap;pointer-events:none}.step-row{flex-wrap:wrap}.step{min-width:68px}.practice-progress .bar{min-width:10px}
/* 2026-10-28 UI: read-first paragraph, sticky practice bar, top toast, mobile button wrap. */
.read-first{margin:4px 0 6px;border:1px dashed #d9e2ca;border-radius:12px;background:#fbfcf6;padding:0 16px}.read-first summary{cursor:pointer;font-size:12px;color:#7c8a71;padding:11px 0;list-style:none;display:flex;align-items:center;gap:8px;user-select:none}.read-first summary::-webkit-details-marker{display:none}.read-first summary::before{content:"▸";font-size:11px;transition:transform .2s}.read-first[open] summary::before{transform:rotate(90deg)}.read-first p{margin:0 0 14px;font-size:17px;line-height:1.95;color:#3b5443;letter-spacing:.5px}
.mini-metrics{margin:14px 0 2px}.practice-bottom{position:sticky;bottom:var(--kb,0px);z-index:3;display:flex;align-items:center;justify-content:flex-start;gap:14px;margin:12px -30px -25px;padding:12px 30px 16px;background:#fffdf8;border-top:1px solid var(--line);border-radius:0 0 18px 18px;box-shadow:0 -10px 22px -16px #223c3060}.practice-bottom .feedback{flex:1;margin:0;min-height:0}.input-count{font-size:12px;color:#7c8a71;white-space:nowrap}.practice-bottom .primary{white-space:nowrap;flex-shrink:0}.practice-bottom .primary.ready{animation:ready-pulse 1.2s ease-in-out 2}@keyframes ready-pulse{0%,100%{box-shadow:0 0 0 0 #2e624a55}50%{box-shadow:0 0 0 9px #2e624a00}}.practice-top .secondary{white-space:nowrap;flex-shrink:0}
.toast{top:16px;bottom:auto;transform:translateX(-50%) translateY(-15px)}.toast.visible{transform:translateX(-50%) translateY(0)}
@media(max-width:640px){.practice-bottom{flex-direction:row;flex-wrap:wrap;align-items:center;gap:8px 10px;margin:10px -12px -18px;padding:10px 12px 12px;border-radius:0 0 18px 18px}.practice-bottom .feedback{flex:1 1 100%;font-size:12px;line-height:1.6}.practice-bottom .primary{flex:1;padding:12px 16px}.read-first{padding:0 12px}.read-first p{font-size:16px;line-height:1.9}.char-input{height:44px}.toast{top:12px;max-width:calc(100vw - 24px)}}
@media(prefers-reduced-motion:reduce){.practice-bottom .primary.ready{animation:none}}
/* Touch (iPad): no sticky hover lift, no double-tap zoom on cells, no grey tap flash. */
@media(hover:none){.level-card:not(:disabled):hover{transform:none}button:hover:not(:disabled),a:hover{filter:none}}.char-input{touch-action:manipulation;-webkit-tap-highlight-color:transparent}button,a,summary{-webkit-tap-highlight-color:transparent}
/* Wide PC screens: a little more room per cell. */
@media(min-width:1500px){.practice-shell{max-width:1040px}.glyph .model-char{font-size:28px}}
/* Cloud save settings. */
.link-row{display:flex;gap:8px;align-items:stretch}.link-row input{flex:1;min-width:0;font-size:12px;padding:10px 12px;border:1px solid #dce4d0;border-radius:10px;background:#fafbf5;color:#365d43}.link-row .secondary{white-space:nowrap}.cloud-status{font-size:12px;color:#7c8a71;margin:10px 0 0}.cloud-status.ok{color:#527d3e}.cloud-status.warn{color:#ad684c}.code-switch{margin-top:12px}.code-switch summary{cursor:pointer;font-size:12px;color:#7c8a71}