:root{--bg:#f5f4ee;--paper:#fffefa;--ink:#283f37;--muted:#758078;--green:#386457;--line:#e1e5da;--soft:#eaf0e6;--gold:#c7a66a;font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea{touch-action:manipulation}button{cursor:pointer;border:1px solid var(--line);border-radius:12px;background:var(--paper);color:var(--ink);padding:12px 18px;transition:background .15s}button:hover{background:var(--soft)}button:disabled{opacity:.5;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #c7a66a;outline-offset:3px}.primary{background:var(--green);color:white;border-color:var(--green)}.primary:hover{background:#274d41}.quiet{background:transparent}.shell{display:grid;grid-template-columns:236px minmax(0,1fr);min-height:100vh;max-width:1600px;margin:auto}aside{position:sticky;top:0;height:100vh;padding:38px 24px;border-right:1px solid var(--line);display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-size:21px;font-weight:650}.brand-icon{background:var(--green);color:#fff;width:46px;height:46px;border-radius:15px;text-align:center;font:italic 34px Georgia;padding:2px}.brand small{display:block;font-size:8px;letter-spacing:1.2px;margin-top:6px;font-weight:400}nav{display:grid;gap:10px;margin-top:60px}nav button{text-align:left;border:0;background:none;font-size:20px;padding:16px}nav button span{font-size:15px;margin-left:14px}nav button.active{background:#e3ebdf;color:#2d5947}.aside-note{margin-top:auto;padding:24px 12px;color:var(--muted);font-size:14px;line-height:1.9}.leaf{color:#8da482;font:50px Georgia}.aside-note small{font-size:11px}main{padding:28px 5.5% 0;min-width:0}header{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;letter-spacing:.4px;padding:4px 0 36px}.connection{color:var(--green)}h1{font-size:34px;letter-spacing:-1px;font-weight:550;margin:5px 0 14px}h2{font-size:22px;font-weight:550;margin:0 0 14px}h3{font-size:16px;font-weight:550;margin:0 0 12px}p{line-height:1.85}small,.muted{color:var(--muted)}.eyebrow{font-size:10px;color:var(--green);letter-spacing:2px;margin:0 0 12px}.intro{display:flex;justify-content:space-between;align-items:center;margin:0 0 30px;gap:20px}.intro p{color:var(--muted);font-size:14px;margin:0}.segmented{padding:4px;background:#ebece4;border-radius:14px;display:flex;gap:4px;white-space:nowrap}.segmented button{border:0;background:none;padding:10px 14px;font-size:12px}.segmented button.selected{background:var(--paper);box-shadow:0 2px 5px #233c2810}.hero{position:relative;overflow:hidden;border-radius:22px;background:#e4ebdf;min-height:245px;padding:35px 36px;margin-bottom:25px;display:flex;justify-content:space-between}.hero .copy{position:relative;z-index:1;max-width:70%}.hero h2{font-size:29px;line-height:1.5;margin:14px 0}.hero p{font-size:13px;color:#5c7164}.hero .orb{position:absolute;width:230px;height:230px;border:1px solid #abbda6;border-radius:50%;right:20px;top:25px}.hero .orb:before,.hero .orb:after{content:'';position:absolute;width:190px;height:190px;border:1px solid #abbda6;border-radius:50%;left:20px;top:20px;transform:rotate(-35deg) scaleX(.45)}.hero .orb:after{transform:rotate(35deg) scaleX(.45)}.hero .sprig{position:absolute;right:80px;bottom:60px;font:120px Georgia;color:#8ca482}.badge{font-size:11px;display:inline-block;padding:6px 10px;border:1px solid #b7c7b0;border-radius:20px;color:var(--green)}.grid{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(220px,1fr);gap:24px}.card{background:var(--paper);border:1px solid var(--line);padding:24px;border-radius:18px;margin-bottom:20px}.section-top{display:flex;justify-content:space-between;align-items:center;margin:5px 0 16px}.section-top small{font-size:12px}.task-row{display:flex;align-items:center;gap:14px;padding:16px 0;border-bottom:1px solid #eef0e8;font-size:14px}.task-row:last-child{border:0}.task-num{background:#f0f2eb;border-radius:50%;width:31px;height:31px;display:grid;place-items:center;font-size:12px;color:#8c998e}.task-row.done .task-num{background:var(--soft);color:var(--green)}.task-row .desc{flex:1}.task-row .desc small{display:block;font-size:11px;margin-top:5px}.task-row>small{font-size:11px}.progress{height:5px;background:#e4e9dd;border-radius:5px;margin:16px 0;overflow:hidden}.progress span{display:block;height:100%;background:#739477}.word-feature{font:32px Georgia;margin:22px 0 5px}.quote{font:22px/1.7 Georgia;color:#55765e}.note{font-size:12px;color:var(--muted);background:#f2f4ed;padding:13px 16px;border-radius:10px;line-height:1.8}.actions{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 0}.practice{max-width:830px;margin:auto}.practice .card{padding:30px}.practice-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.step{font-size:11px;color:var(--green);letter-spacing:1px}.english{font:28px/1.8 Georgia;letter-spacing:.1px;margin:22px 0}.choices{display:grid;gap:10px;margin:20px 0}.choices label{display:flex;align-items:center;gap:12px;border:1px solid var(--line);padding:16px;border-radius:12px;font-size:14px;cursor:pointer}.choices label:has(input:checked){border-color:var(--green);background:var(--soft)}input[type=radio],input[type=checkbox]{accent-color:var(--green);width:17px;height:17px}textarea,input[type=text],input[type=password],input[type=time],select{border:1px solid #cbd3c8;border-radius:10px;padding:13px;background:#fffefa;color:var(--ink);max-width:100%}textarea{width:100%;min-height:115px;resize:vertical;line-height:1.8}.levels{display:flex;gap:6px;flex-wrap:wrap;margin:18px 0}.levels button{font-size:12px;padding:9px 12px}.levels .selected{background:var(--green);color:white}.span-block{display:inline-block;padding:3px 9px;margin:4px 3px 4px 0;border-bottom:3px solid #afc4a3;border-radius:6px;background:#eff3eb}.span-block:nth-child(2n){background:#f4eee2;border-color:#d4bb89}.span-block small{display:block;font:12px/1.5 "Microsoft YaHei",sans-serif}.feedback{padding:18px;border-left:3px solid var(--green);background:var(--soft);margin-top:18px;line-height:1.9}.feedback.error{border-color:#bb8d5e;background:#f8f0e5}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#293f36;color:white;padding:14px 22px;border-radius:12px;max-width:90%;z-index:9;display:none;font-size:13px}footer{padding:35px 0 20px;text-align:center;color:#98a092;font-size:11px;letter-spacing:1px}.unit-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.unit-list .card{margin:0}.unit-list h3{font:23px Georgia}.search{width:100%;margin:0 0 20px}.chips{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}.chip{background:#eef2e9;font-size:11px;padding:7px 9px;border-radius:8px}.matrix{overflow:auto}table{border-collapse:collapse;width:100%;font-size:11px;white-space:nowrap}th,td{text-align:left;padding:12px 8px;border-bottom:1px solid var(--line)}th{color:var(--muted);font-weight:400}.record-state{margin:12px 0;font-size:12px;color:var(--muted)}audio{max-width:100%;margin:15px 0}.settings-row{display:flex;align-items:center;justify-content:space-between;margin:18px 0;gap:15px}.empty{padding:40px 20px;text-align:center;color:var(--muted)}dialog{border:1px solid var(--line);border-radius:20px;max-width:90%;padding:30px;background:var(--paper)}dialog::backdrop{background:#23372d55}.loading{padding:80px;text-align:center}.warning{font-size:12px;color:#8a673d}a{color:var(--green)}
@media(min-width:1400px){main{padding-left:7%;padding-right:7%}}@media(max-width:1000px){.shell{grid-template-columns:190px minmax(0,1fr)}aside{padding:32px 16px}.brand{font-size:17px}.brand small{font-size:6px}.grid{grid-template-columns:1fr}.hero .orb{right:-70px}.hero .copy{max-width:85%}main{padding:25px 5% 0}}@media(max-width:640px){.shell{display:block}aside{position:fixed;top:auto;bottom:0;height:72px;width:100%;z-index:5;padding:0;background:#fffefaf7;border-top:1px solid var(--line);border-right:0;display:block}.brand,.aside-note{display:none}nav{display:flex;margin:0;height:100%;gap:0;justify-content:space-around}nav button{font-size:20px;border-radius:0;padding:8px 4px;min-width:23%;text-align:center}nav button span{display:block;font-size:10px;margin:4px 0 0}nav button.active{background:none;color:#2b6549}main{padding:22px 20px 70px}header{padding-bottom:28px;font-size:10px}h1{font-size:28px}.intro{align-items:flex-start;flex-direction:column;gap:18px;margin-bottom:22px}.hero{padding:25px 22px;min-height:250px}.hero h2{font-size:25px}.hero .copy{max-width:100%}.hero .orb{right:-120px;opacity:.5}.hero .sprig{right:-10px;opacity:.3}.card,.practice .card{padding:20px}.english{font-size:24px}.unit-list{grid-template-columns:1fr}.segmented{align-self:flex-start}.practice-head{align-items:flex-start;gap:10px}.practice-head button{padding:9px 12px}#toast{bottom:86px}.actions button{font-size:13px}footer{font-size:10px}}