:root{--ink:#203b35;--green:#17493e;--orange:#c74e2e;--paper:#f8f6ef;--muted:#6c7871;--line:#e0e4db;--soft:#eaf0e8}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.5;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #df9770;outline-offset:4px}a{color:var(--green)}header{height:98px;max-width:1400px;margin:auto;padding:0 48px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:20px}.brand{text-decoration:none;display:flex;align-items:center;gap:13px;font-weight:700;font-size:22px;letter-spacing:1px}.brand small{display:block;font-size:10px;letter-spacing:2px;font-weight:600;color:var(--muted)}.brand-icon{background:var(--green);color:#fff;width:44px;height:44px;display:grid;place-items:center;border-radius:14px 14px 14px 3px}.header-note{font-size:14px;color:var(--muted)}.plain{background:none;border:0;color:var(--ink);padding:10px;font-size:14px}.layout{display:grid;grid-template-columns:230px minmax(0,1fr);max-width:1400px;margin:auto;min-height:calc(100vh - 98px)}aside{padding:36px 24px 24px 40px;border-right:1px solid var(--line);display:flex;flex-direction:column}.aside-label{font-size:11px;color:var(--muted);letter-spacing:2px;margin:6px 0 22px}nav{display:grid;gap:8px}nav button{display:flex;gap:14px;align-items:center;border:0;background:none;text-align:left;padding:12px 16px;border-radius:10px;font-size:15px;color:var(--muted);min-height:48px}nav button.active{background:var(--green);color:white}nav button:hover:not(.active){background:var(--soft)}.journey{border-top:1px solid var(--line);margin-top:38px;padding-top:26px;font-size:12px}.journey strong{display:block;font-size:26px;margin:10px 0}.track{height:5px;background:#dce3d8;border-radius:5px;overflow:hidden}.track i{height:100%;display:block;background:var(--orange);width:0;transition:width .2s}.journey p{color:var(--muted);line-height:1.9;font-size:11px}.aside-bottom{font-size:12px;color:var(--muted);margin-top:auto;padding-top:60px}main{padding:38px 48px 48px;min-width:0}.topline{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px;font-size:12px;color:var(--muted)}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:700;color:var(--orange)}.hero{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:32px}h1{font-size:40px;line-height:1.3;letter-spacing:-1px;margin:10px 0 12px}h2{font-size:24px;line-height:1.4;margin:12px 0}h3{font-size:18px;margin:0}p{color:var(--muted)}.hero p{margin:0;font-size:14px}.sun{flex-shrink:0;width:105px;height:105px;border-radius:50%;background:#eacd87;display:grid;place-content:center;text-align:center;transform:rotate(8deg);color:var(--green);border:8px solid #f0dfb2}.sun b{font-size:35px;line-height:1}.sun small{font-size:11px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:24px}.practice{border:1px solid var(--line);background:#fffef9;border-radius:20px;overflow:hidden}.cardtop{display:flex;justify-content:space-between;align-items:center;padding:22px 26px;border-bottom:1px solid var(--line);gap:15px}.count{font-size:12px;color:var(--muted);letter-spacing:1px}.bookmark{border:0;background:var(--soft);color:var(--green);border-radius:50%;width:40px;height:40px;font-size:24px}.phrase{padding:34px 28px 28px;min-height:238px}.phrase .scene{font-size:12px;color:var(--orange)}.vi{font-size:34px;line-height:1.4;margin:18px 0 12px;font-weight:650;color:var(--green);overflow-wrap:anywhere}.translation{font-size:19px;color:var(--ink);margin:0 0 18px}.hint{font-size:12px;color:var(--muted);margin:0}.hide-toggle{font-size:12px;text-decoration:underline;border:0;background:none;color:var(--muted);padding:8px 0}.sound-actions{padding:0 28px 28px;display:flex;align-items:center;flex-wrap:wrap;gap:10px}.btn{background:#fffef9;color:var(--green);border:1px solid #d6ded5;padding:12px 18px;border-radius:10px;min-height:46px;font-size:14px;font-weight:600}.btn:hover{background:var(--soft)}.btn.primary{background:var(--green);color:white;border-color:var(--green)}.btn.primary:hover{background:#236453}.btn.orange{background:var(--orange);color:white;border-color:var(--orange)}.speed{border:1px solid var(--line);background:transparent;padding:10px;border-radius:8px;min-height:46px;font-size:13px}.record{padding:20px 28px;background:#eef2eb;border-top:1px solid var(--line)}.record-header{display:flex;align-items:center;justify-content:space-between;gap:14px;font-size:13px}.record p{font-size:11px;margin:8px 0 0}.record audio{display:block;max-width:100%;height:40px;margin-top:12px;width:100%}.bottom-actions{margin-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px}.dots{display:flex;gap:8px}.dots button{width:30px;height:30px;border-radius:50%;border:1px solid var(--line);background:transparent;font-size:11px;color:var(--muted)}.dots button.current{border-color:var(--green);background:var(--green);color:white}.dots button.done{background:#dfe9da;color:var(--green)}.side-card{padding:24px;background:#eaf0e6;border-radius:18px;align-self:start}.side-card .label{font-size:11px;letter-spacing:2px;color:var(--muted)}.steps{list-style:none;margin:20px 0;padding:0;display:grid;gap:20px}.steps li{display:grid;grid-template-columns:24px 1fr;gap:10px;font-size:13px}.steps span{color:var(--orange);font-size:11px}.steps small{display:block;color:var(--muted);font-size:11px;margin-top:4px}.tip{border-top:1px solid #cfdbc9;padding-top:18px;font-size:12px;color:var(--muted)}.lesson-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:30px;border-top:1px solid var(--line);padding-top:18px;color:var(--muted);font-size:12px}.success{margin-top:18px;background:#e5efdf;padding:18px;border-radius:12px;font-size:14px}.success .btn{margin-top:12px}.week{margin-top:30px}.week .week-heading{display:flex;gap:14px;align-items:center;margin-bottom:14px}.week .week-heading span{font-size:12px;color:var(--muted)}.day-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.day{border:1px solid var(--line);border-radius:12px;background:#fffef9;text-align:left;padding:18px;min-height:112px;color:var(--ink)}.day:hover{border-color:var(--green)}.day.selected{box-shadow:inset 0 0 0 1px var(--green);border-color:var(--green)}.day small{display:block;font-size:11px;color:var(--muted);margin-bottom:7px}.day strong{display:block;font-size:14px}.day .day-status{font-size:11px;color:var(--orange);margin-top:8px}.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:24px 0}.review-list{display:grid;gap:12px}.sentence-row{padding:20px;border:1px solid var(--line);background:#fffef9;border-radius:12px;display:flex;align-items:center;justify-content:space-between;gap:18px}.sentence-row strong{display:block;font-size:18px;color:var(--green)}.sentence-row span{font-size:13px;color:var(--muted)}.sentence-row .actions{display:flex;gap:8px;flex-shrink:0}.search{width:100%;max-width:400px;padding:14px 16px;border:1px solid var(--line);border-radius:10px;background:#fffef9;color:var(--ink)}.review-panel{max-width:650px;background:#fffef9;border:1px solid var(--line);border-radius:20px;padding:30px}.timer{font-size:50px;letter-spacing:-2px;color:var(--orange);font-variant-numeric:tabular-nums}.review-panel .zh-cue{font-size:24px;margin:18px 0}.review-panel .answer{font-size:25px;color:var(--green);margin:18px 0}.muted{font-size:13px;color:var(--muted)}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);border-radius:12px;background:var(--green);color:white;padding:12px 22px;max-width:calc(100% - 32px);font-size:14px;z-index:10;display:none}dialog{border:1px solid var(--line);border-radius:20px;padding:32px;background:var(--paper);color:var(--ink);max-width:550px;width:calc(100% - 32px)}dialog::backdrop{background:#173c3555}dialog p{font-size:14px;line-height:1.9}dialog a{font-size:13px}.close{float:right}.empty{padding:30px 0;color:var(--muted)}.file-label{cursor:pointer}.file-label input{display:none}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(min-width:1400px){header{border-left:1px solid var(--line);border-right:1px solid var(--line)}.layout{border-left:1px solid var(--line);border-right:1px solid var(--line)}}
@media(max-width:1100px){.workspace{grid-template-columns:minmax(0,1fr)}.side-card{display:none}main{padding:30px}.layout{grid-template-columns:200px minmax(0,1fr)}aside{padding-left:24px}h1{font-size:34px}}
@media(max-width:700px){header{height:80px;padding:0 20px}.header-note{display:none}.brand{font-size:18px}.brand small{font-size:9px}.layout{display:block}aside{padding:12px 14px;border-right:0;border-bottom:1px solid var(--line)}.aside-label,.journey,.aside-bottom{display:none}nav{grid-template-columns:repeat(4,1fr);gap:4px}nav button{justify-content:center;flex-direction:column;gap:2px;padding:8px 3px;font-size:13px}nav button span{font-size:11px}main{padding:22px 18px 36px}.topline{margin-bottom:16px;font-size:11px}.hero{margin-bottom:24px;gap:12px}h1{font-size:29px}.hero p{font-size:12px}.sun{width:74px;height:74px;border-width:5px}.sun b{font-size:26px}.sun small{font-size:9px}.cardtop{padding:16px 20px}.phrase{padding:26px 20px 20px;min-height:230px}.vi{font-size:30px}.sound-actions{padding:0 20px 22px}.record{padding:18px 20px}.record-header{flex-wrap:wrap}.bottom-actions{flex-wrap:wrap}.bottom-actions>.btn{flex:1}.day-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.day{padding:14px}.lesson-foot{flex-wrap:wrap}.sentence-row{align-items:flex-start;flex-direction:column}.review-panel{padding:24px}.review-panel .zh-cue{font-size:21px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

.level-select{width:100%;padding:11px 10px;margin:0 0 20px;border:1px solid var(--line);border-radius:10px;background:#fffef9;color:var(--green);font-size:13px;min-height:44px}.level-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.level-card{border:1px solid var(--line);border-radius:16px;padding:22px;background:#fffef9;color:var(--ink);text-align:left}.level-card.selected{border-color:var(--green);background:var(--soft);box-shadow:inset 0 0 0 1px var(--green)}.level-card h2{font-size:22px}.level-card p{font-size:13px;line-height:1.8}.level-card .eyebrow{letter-spacing:1px}.level-progress{font-size:12px;color:var(--green)}.readiness{margin:24px 0;padding:24px;background:#eaf0e6;border-radius:16px}.ready-check{display:flex;align-items:center;gap:12px;margin:10px 0;min-height:44px;font-size:14px;cursor:pointer}.ready-check input{width:18px;height:18px;accent-color:var(--green)}.route-title{margin-top:36px}.dots button{width:36px;height:36px}
@media(max-width:1000px){.level-grid{grid-template-columns:1fr}.level-card p{margin:8px 0}.level-card h2{margin:8px 0}.level-card{padding:18px}}
@media(max-width:700px){.level-select{margin-bottom:10px;font-size:16px}.ready-check{font-size:13px}.readiness{padding:20px}.level-card .eyebrow{font-size:11px}}