@import"https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700&family=Noto+Serif+SC:wght@600;700&family=Source+Serif+4:opsz,wght@8..60,500;8..60,600&display=swap";:root{color:#142b49;background:#fbf8f2;font-family:Noto Sans SC,system-ui,sans-serif;font-synthesis:none;--ink: #142b49;--muted: #6e7884;--teal: #098d8b;--teal-soft: #e8f4f1;--coral: #e85e4f;--paper: #fffdf9;--line: #ded7ce;--shadow: 0 16px 45px rgba(40, 50, 60, .07)}*{box-sizing:border-box}button,input,textarea{font:inherit}button{border:0;background:none;color:inherit;cursor:pointer}body{margin:0;min-width:320px;min-height:100vh;background:#fbf8f2;-webkit-font-smoothing:antialiased}.app-shell{min-height:100vh;padding:24px 38px 40px}.topbar{display:grid;grid-template-columns:1fr auto 1fr;align-items:start;min-height:132px}.brand{font-family:"Noto Serif SC",serif;font-size:1.65rem;font-weight:700;letter-spacing:.12em}.switch-stack{display:grid;gap:10px;width:300px}.segmented{display:grid;grid-template-columns:1fr 1fr;padding:3px;border:1px solid var(--line);border-radius:9px;background:#ffffff94}.segmented button{min-height:42px;border-radius:6px;color:#45566d;font-weight:600}.segmented button.is-active{background:var(--teal);color:#fff;box-shadow:0 5px 14px #098d8b2e}.top-progress{justify-self:end;display:grid;gap:6px;text-align:right}.top-progress strong{font-family:"Noto Serif SC",serif;font-size:1.2rem}.top-progress span{color:#52647b}.sentence-page,.template-page{width:min(100%,1280px);margin-inline:auto}.context-head{display:grid;justify-items:center;gap:8px;margin-bottom:18px}.context-head span{color:var(--teal);font-size:.86rem}.context-head strong{font-family:"Noto Serif SC",serif;font-size:1.15rem;font-weight:600}.study-card,.dictation-card{position:relative;min-height:610px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:56px 72px;border:1px solid var(--line);border-radius:14px;background:#fffdf9d1;box-shadow:var(--shadow)}.chinese-prompt{width:min(100%,960px);margin:0 0 48px;color:var(--ink);font-family:"Noto Serif SC",serif;font-size:clamp(1.45rem,2.3vw,2rem);font-weight:600;line-height:1.65;text-align:center}.english-study{max-width:1080px;color:#172c49;font-family:"Source Serif 4",Georgia,serif;font-size:clamp(2rem,3.2vw,3.05rem);font-weight:500;line-height:1.8;text-align:center}.english-study button{padding:0 .04em .06em;border-bottom:1px solid #bac2c8;font:inherit;transition:color .16s,border-color .16s,background .16s}.english-study button:hover,.english-study button.is-selected{border-bottom:2px solid var(--teal);color:var(--teal);background:#098d8b09}.sentence-audio{display:grid;width:42px;height:42px;place-items:center;margin-top:28px;border:1px solid var(--line);border-radius:50%;color:var(--teal)}.sentence-audio svg{width:20px;height:20px}.quiet-help{margin:24px 0 0;color:var(--muted);font-size:.9rem}.sentence-phrases{display:grid;width:min(100%,960px);grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:28px;padding-top:18px;border-top:1px solid #e8e1d8}.phrase-heading{grid-column:1 / -1;display:flex;align-items:baseline;gap:12px;text-align:left}.phrase-heading strong{color:#17304d}.phrase-heading span{color:var(--muted);font-size:.82rem}.sentence-phrases>button{position:relative;display:grid;gap:4px;padding:12px 38px 12px 14px;border:1px solid #e4ddd4;border-radius:9px;background:#faf7f2;text-align:left}.sentence-phrases>button>span{color:#163b57;font:600 1rem "Source Serif 4",serif}.sentence-phrases>button small{color:#687486;font-size:.82rem;line-height:1.45}.sentence-phrases>button svg{position:absolute;top:14px;right:13px;width:17px;color:var(--teal)}.word-detail{width:min(660px,100%);margin-top:26px;border:1px solid #ded8cf;border-radius:12px;background:#fff;box-shadow:0 12px 30px #28323c1f;text-align:left}.word-detail-head{display:flex;align-items:center;border-bottom:1px solid #ebe5dd}.word-title{display:flex;min-width:0;flex:1;align-items:baseline;gap:14px;padding:15px 22px;text-align:left}.word-title strong{color:var(--teal);font:600 1.3rem "Source Serif 4",serif}.word-title span{color:#526076;font-size:.9rem}.word-title svg{width:18px;color:#667387}.close-detail{width:44px;height:44px;color:#7a8490;font-size:1.5rem}.word-detail dl{margin:0;padding:10px 22px 16px}.word-detail dl>div{display:grid;grid-template-columns:118px 1fr;gap:12px;padding:8px 0}.word-detail dt{color:var(--teal);font-weight:700}.word-detail dd{margin:0;color:#415269;line-height:1.55}.word-detail dd button{display:inline-flex;align-items:center;gap:8px;font-family:"Source Serif 4",serif}.word-detail dd svg{width:16px;color:var(--teal)}.word-detail .inline-word{display:inline;padding:0;color:#153c59;border-bottom:1px dotted #8aa2b4;font-family:inherit}.phrase-meaning{display:block;margin-top:5px;color:#657386;font-family:Noto Sans SC,sans-serif}.dictation-card{justify-content:flex-start;padding-top:38px;cursor:text}.dictation-card .chinese-prompt{margin-top:42px;margin-bottom:56px}.dictation-label{align-self:flex-start;padding:7px 12px;border:1px solid #e6ded5;border-radius:7px;background:#f7f3ed;color:#3f5669}.word-slots{display:flex;width:min(100%,1140px);flex-wrap:wrap;justify-content:center;gap:36px 24px;padding:14px 0 28px}.word-slots>span{position:relative;display:block;width:var(--slot);min-height:52px;border-bottom:1px solid #b8b8b4;color:#172c49;font:500 clamp(1.6rem,2.5vw,2.35rem) "Source Serif 4",serif;line-height:1.4;text-align:center}.word-slots>span.is-filled{border-bottom-color:var(--teal)}.word-slots>span.is-wrong{border-bottom:2px solid var(--coral);color:var(--coral)}.word-slots>span small{position:absolute;top:calc(100% + 4px);left:0;width:100%;color:var(--coral);font:500 .8rem Noto Sans SC,sans-serif}.dictation-capture{position:absolute;width:1px;height:1px;opacity:.01;pointer-events:none}.typing-guide{margin:auto 0 0;color:var(--muted)}.word-count{margin:16px 0 0;color:#677486}.word-count b{color:var(--teal)}.inline-error{margin:10px 0 0;color:var(--coral);font-size:.9rem}.dictation-card.is-complete{border-color:#098d8b8c}.lesson-foot,.template-foot{display:flex;justify-content:center;gap:28px;padding:24px 12px 0;color:#7b8189;font-size:.9rem}.sentence-nav{position:fixed;z-index:20;bottom:22px;left:50%;display:flex;justify-content:center;gap:10px;padding:8px;border:1px solid rgba(216,209,200,.88);border-radius:999px;background:#fffdf9f0;box-shadow:0 10px 28px #1d2b3a24;transform:translate(-50%);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.sentence-nav button{display:inline-flex;min-width:132px;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border:1px solid #d8d1c8;border-radius:999px;background:#fffdf9;color:#24384d;font-weight:700}.sentence-nav button.is-primary{border-color:var(--teal);background:var(--teal);color:#fff}.sentence-nav svg{width:18px;height:18px}.size-switch{display:grid;grid-template-columns:1fr 1fr;width:280px;margin:0 auto 18px;border:1px solid var(--line);border-radius:7px;overflow:hidden}.size-switch button{min-height:40px;font-weight:600}.size-switch button.is-active{background:var(--teal);color:#fff}.type-switch{display:flex;justify-content:center;gap:42px;margin-bottom:26px;overflow-x:auto}.type-switch.is-long{justify-content:flex-start;padding:0 2px 8px}.type-switch button{flex:0 0 auto;padding:6px 2px 8px;border-bottom:2px solid transparent;color:#5b6a7c}.type-switch button.is-active{border-color:var(--teal);color:var(--teal);font-weight:700}.template-heading{margin-bottom:26px;text-align:center}.template-heading h1{margin:0;font:700 clamp(1.8rem,3vw,2.55rem) "Noto Serif SC",serif}.template-heading p{margin:10px 0 0;color:#627187}.template-card{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.12fr);gap:0;min-height:520px;border:1px solid var(--line);border-radius:14px;background:#fffdf9d1;box-shadow:var(--shadow)}.template-card>article{padding:34px 46px}.template-card>article+article{border-left:1px solid #e4ddd5}.template-card h2{margin:0 0 24px;font:600 1.25rem "Noto Serif SC",serif}.template-card p{margin:0 0 15px;color:#354962;line-height:1.75}.template-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.template-title-row>span{color:#697789;font-size:.85rem;line-height:1.65;text-align:right}.template-title-row>button{color:var(--teal)}.clickable-paragraph{font-family:"Source Serif 4",serif;font-size:1.1rem}.clickable-paragraph button{padding:0 1px;border-bottom:1px solid transparent;font:inherit}.clickable-paragraph button:hover{border-color:var(--teal);color:var(--teal)}.full-dictation textarea{width:100%;min-height:335px;padding:14px 16px;border:1px solid #ddd5cb;border-radius:10px;outline:0;background:#ffffff75;color:#273b54;font:500 1.1rem/41px "Source Serif 4",serif;resize:vertical}.full-dictation textarea:focus{border-color:#098d8b8c;box-shadow:0 0 0 3px #098d8b12}.full-dictation>p{margin:12px 6px 0;color:#697789;font-size:.86rem}.template-result{margin-top:14px;padding:12px 14px;border-left:3px solid var(--coral);background:#fff4f1;color:#9f4036}.template-result.is-correct{border-color:var(--teal);background:var(--teal-soft);color:#176c6a}@media(max-width:900px){.app-shell{padding:18px 16px 30px}.topbar{grid-template-columns:1fr auto;min-height:190px}.switch-stack{grid-column:1 / -1;grid-row:2;width:min(100%,340px);margin:18px auto 0}.top-progress{font-size:.82rem}.study-card,.dictation-card{min-height:590px;padding:34px 22px}.english-study{font-size:2rem}.word-slots{gap:30px 14px}.lesson-foot{flex-wrap:wrap;gap:8px 18px}.template-card{grid-template-columns:1fr}.template-card>article{padding:28px 24px}.template-card>article+article{border-left:0;border-top:1px solid #e4ddd5}.type-switch{justify-content:flex-start;gap:28px}}@media(max-width:540px){.brand{font-size:1.3rem}.top-progress strong{font-size:.95rem}.chinese-prompt{font-size:1.25rem;margin-bottom:34px}.english-study{font-size:1.55rem;line-height:1.85}.word-title{display:grid;gap:4px}.word-detail dl>div{grid-template-columns:1fr;gap:4px}.sentence-phrases{grid-template-columns:1fr}.sentence-nav button{min-width:118px}.sentence-nav{bottom:12px}.word-slots{justify-content:flex-start}.word-slots>span{font-size:1.35rem}.typing-guide{text-align:center}.template-heading h1{font-size:1.65rem}}