:root{--bg:#f5f4ed;--paper:#fffef9;--ink:#182d2c;--muted:#697773;--teal:#134c49;--lime:#e0efaa;--line:#dbdfd4;--orange:#dc754e;--red:#a83d36;--serif:Georgia,'Noto Serif TC','Songti TC',serif;--sans:ui-sans-serif,system-ui,-apple-system,'PingFang TC','Microsoft JhengHei',sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.7 var(--sans)}button,input,select,textarea{font:inherit}button,a,input,textarea,select{touch-action:manipulation}button,a{cursor:pointer}button{color:inherit}a{color:var(--teal)}button:disabled{cursor:default;opacity:.48}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #b6923c;outline-offset:3px}h1,h2,h3,p{margin-top:0}h1,h2{font-family:var(--serif);font-weight:400;line-height:1.14}h1{font-size:clamp(36px,4.5vw,62px);letter-spacing:-2px}h2{font-size:32px;letter-spacing:-.7px}h3{font-size:18px;line-height:1.4}.muted,.fine{color:var(--muted)}.fine{font-size:12px;line-height:1.8}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:700;text-transform:uppercase}.tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:30px;padding:3px 11px;font-size:11px;letter-spacing:.5px;white-space:nowrap}.tag.green{background:var(--lime);border-color:transparent;color:var(--teal)}.tag.orange{color:#9b4c28;background:#fae8da;border-color:transparent}.tag.light{background:#fff2;border-color:#fff3;color:white}.layout{display:grid;grid-template-columns:220px minmax(0,1fr);min-height:100vh}.rail{padding:31px 23px;position:sticky;top:0;height:100vh;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:30px}.brand{display:flex;gap:10px;align-items:center;color:var(--teal);text-decoration:none}.brandmark{font:italic 34px var(--serif);width:42px;height:44px;border-radius:12px;background:var(--teal);color:var(--lime);text-align:center}.brand strong{display:block;line-height:1.15;font-size:16px}.brand small{font-size:10px;letter-spacing:1.2px;color:var(--muted)}.rail nav{display:flex;flex-direction:column;gap:7px}.nav{background:none;border:0;border-radius:9px;padding:12px 13px;text-align:left;color:var(--muted)}.nav.active{background:#e5e9dc;color:var(--teal);font-weight:650}.nav span{display:inline-block;width:28px;font-size:18px}.rail-note{margin-top:auto;border-top:1px solid var(--line);padding-top:19px}.content{padding:0 44px 60px;min-width:0;max-width:1440px;width:100%;margin:auto}.top{display:flex;justify-content:space-between;align-items:center;gap:15px;min-height:85px;border-bottom:1px solid 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var(--line);padding:25px;border-radius:13px;margin-bottom:22px}.panel.tinted{background:#ebeee2}.panel h2{margin:10px 0 17px}.panel-head{display:flex;justify-content:space-between;gap:14px;align-items:center;margin-bottom:20px}.panel-head h3{margin:0}.task-row{display:flex;gap:14px;align-items:center;padding:17px 0;border-top:1px solid var(--line)}.task-row:first-of-type{border-top:0}.task-row .num{border:1px solid var(--line);color:var(--teal);border-radius:50%;width:36px;height:36px;display:grid;place-items:center;flex-shrink:0}.task-row p{margin:3px 0 0;font-size:12px;color:var(--muted)}.task-row .grow{flex:1}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:23px}.metric{border:1px solid var(--line);border-radius:11px;padding:18px;background:var(--paper)}.metric b{font:33px var(--serif);display:block;margin-bottom:5px}.metric small{color:var(--muted);font-size:11px}.meter{display:flex;align-items:center;gap:20px}.meter-ring{width:112px;height:112px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;background:conic-gradient(var(--teal) var(--fill,0%),#e5e7dc 0);position:relative}.meter-ring::before{content:'';position:absolute;inset:9px;background:var(--paper);border-radius:50%}.meter-ring strong{font:30px var(--serif);z-index:1}.meter p{font-size:12px;color:var(--muted);margin:7px 0}.notice{padding:13px 16px;background:#f4eedc;border-left:3px solid #b49d5a;font-size:12px;border-radius:5px;margin:18px 0}.notice.ok{background:#eaf0dc;border-left-color:var(--teal)}.section-title{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:22px}.section-title h1{font-size:42px;margin:8px 0 12px}.filters{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0}.filters button{border:1px solid var(--line);border-radius:8px;padding:8px 17px;background:transparent}.filters button.active{background:var(--teal);color:white;border-color:var(--teal)}.search{border:1px solid var(--line);background:var(--paper);border-radius:9px;padding:10px 14px;min-width:220px;max-width:100%;color:var(--ink)}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.lesson-card{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:21px;display:flex;flex-direction:column;min-height:235px}.lesson-card h3{font:25px/1.2 var(--serif);margin:15px 0 9px}.lesson-card p{font-size:12px;color:var(--muted)}.lesson-card .actions{margin-top:auto;justify-content:space-between}.mini-progress{height:4px;background:#e6e8de;border-radius:9px;margin:16px 0 8px;overflow:hidden}.mini-progress i{display:block;height:100%;background:var(--teal)}.study-head{max-width:720px;margin:25px 0}.study-head h1{font-size:45px;margin:15px 0}.study-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(230px,1fr);gap:24px}.sentence{padding:18px 0;border-bottom:1px 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var(--line);border-radius:6px;background:var(--paper);padding:5px}.practice-wrap{max-width:850px;margin:auto}.step-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:17px;font-size:12px}.progress-track{height:4px;background:#dce2d5;border-radius:9px;margin-bottom:28px}.progress-track i{display:block;background:var(--teal);height:100%;border-radius:9px}.prompt-card{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:35px}.prompt-card h2{margin:21px 0;font-size:32px;line-height:1.45}.prompt-card .instruction{font-size:13px;color:var(--muted)}textarea{width:100%;resize:vertical;min-height:115px;background:#fafbf5;border:1px solid #cdd4c5;border-radius:9px;padding:16px;color:var(--ink);line-height:1.7}textarea:disabled{color:#3c4943}.confidence{margin:18px 0}.confidence>span{font-size:12px;color:var(--muted);display:block;margin-bottom:8px}.confidence .actions button{background:transparent;border:1px solid var(--line);border-radius:7px;padding:7px 12px;font-size:12px}.confidence button.selected{background:var(--lime);border-color:#a5bd6e}.feedback{border-top:1px solid var(--line);margin-top:24px;padding-top:22px}.feedback h3{color:var(--teal);margin:0 0 13px}.feedback.wrong h3{color:var(--red)}.answer-model{font:23px/1.5 var(--serif);background:#f0f3e7;border-radius:7px;padding:16px;margin:13px 0}.answer-model span{background:#fae1d5;color:#8d3e28}.big-score{font:75px var(--serif);color:var(--teal);line-height:1.1}.result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.result-grid .panel{margin:0}.timeline{display:grid;grid-template-columns:repeat(7,1fr);gap:8px}.day{border:1px solid var(--line);border-radius:8px;padding:13px 4px;text-align:center;background:var(--paper)}.day b{font:24px var(--serif);display:block}.day small{font-size:10px;color:var(--muted)}.bar-row{display:grid;grid-template-columns:110px 1fr 80px;gap:12px;align-items:center;margin:15px 0;font-size:12px}.bar{height:9px;background:#e7eadd;border-radius:12px;overflow:hidden}.bar i{height:100%;display:block;background:var(--teal)}.evidence-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.evidence-card{background:var(--paper);border:1px solid var(--line);border-radius:13px;padding:26px}.evidence-card h2{font-size:27px;margin:16px 0}.evidence-number{font:34px var(--serif);color:var(--teal);margin-bottom:13px}.evidence-card p{font-size:13px}.evidence-card .fine{font-size:11px}.auth-overlay,.conflict-overlay{position:fixed;inset:0;z-index:20;background:#16302be0;display:grid;place-items:center;padding:20px;overflow:auto}.dialog{background:var(--paper);border-radius:15px;padding:32px;width:440px;max-width:100%;position:relative}.dialog h2{margin:14px 0 17px}.dialog label{font-size:12px;display:block;margin:14px 0 6px}.dialog input{width:100%;padding:12px;border:1px solid var(--line);border-radius:8px;background:#fff}.dialog .btn.wide{margin-top:20px}.dialog .close{position:absolute;right:16px;top:14px;background:none;border:0;font-size:23px}.error{color:var(--red)}.account-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.setting-row{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:14px 0;border-top:1px solid var(--line)}.setting-row select{padding:7px 12px;background:var(--paper);border:1px solid var(--line);border-radius:6px}.history-row{border-top:1px solid var(--line);padding:13px 0;display:flex;gap:16px;justify-content:space-between;font-size:12px}.empty{text-align:center;padding:38px 20px;color:var(--muted)}footer{border-top:1px solid var(--line);padding-top:20px;margin-top:35px;display:flex;justify-content:space-between;gap:15px;font-size:11px;color:var(--muted)}#toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,15px);background:var(--teal);color:#fff;padding:11px 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@media(min-width:1550px){.content{padding-left:64px;padding-right:64px}.hero{gap:65px}}
@media(max-width:1100px){.layout{grid-template-columns:180px minmax(0,1fr)}.rail{padding:27px 16px}.content{padding:0 26px 40px}.hero{gap:22px}.hero-copy h1{font-size:46px}.lesson-grid{grid-template-columns:repeat(2,1fr)}.two-col{grid-template-columns:1.2fr 1fr}.metrics{gap:8px}.metric{padding:15px}.study-grid{grid-template-columns:1.4fr 1fr}}
@media(max-width:760px){.layout{display:block}.rail{height:auto;position:sticky;top:0;z-index:8;background:var(--bg);padding:12px 16px 7px;border-right:0;border-bottom:1px solid var(--line);gap:10px}.rail>.brand,.rail-note{display:none}.rail nav{flex-direction:row;gap:2px;justify-content:space-between}.nav{padding:8px 6px;font-size:11px;white-space:nowrap}.nav span{width:19px;font-size:15px}.content{padding:0 18px 35px}.top{min-height:72px;margin-bottom:22px;gap:8px}.top>.eyebrow{font-size:9px;letter-spacing:1px}.top-right{gap:7px}.top-right .status{max-width:94px;line-height:1.4;font-size:10px}.top-right .btn{font-size:10px;padding:7px 9px}.hero{grid-template-columns:1fr;gap:15px;margin-bottom:24px}.hero-copy{padding:0}.hero-copy h1{font-size:44px;letter-spacing:-1.5px;margin:13px 0}.hero-art{min-height:230px;padding:23px}.art-number{font-size:57px}.two-col,.study-grid,.evidence-grid,.account-grid{grid-template-columns:1fr}.panel{padding:20px}.metrics{gap:8px}.metric{padding:14px 10px}.metric b{font-size:27px}.metric small{font-size:10px}.section-title{display:block}.section-title h1{font-size:36px}.search{width:100%;margin-top:10px}.lesson-grid{grid-template-columns:1fr}.lesson-card{min-height:215px}.prompt-card{padding:23px}.prompt-card h2{font-size:27px}.study-head h1{font-size:35px}.result-grid{grid-template-columns:1fr}.timeline{gap:4px}.day{padding:10px 2px}.day b{font-size:20px}.bar-row{grid-template-columns:90px 1fr 60px;gap:7px}.dialog{padding:27px 23px}.big-score{font-size:60px}.step-meta{font-size:10px}.actions .btn{font-size:12px}.setting-row{font-size:13px}footer{flex-direction:column;gap:6px}.feedback .answer-model{font-size:20px}.sentence-top p{font-size:18px}}