:root{--bg:#f4f5f0;--ink:#253830;--muted:#68776e;--green:#216e50;--line:#dbe2d8;--gold:#dfeb9b}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,'PingFang SC',sans-serif;font-size:15px;line-height:1.7}aside{position:fixed;inset:0 auto 0 0;width:244px;background:#e9ede3;padding:35px 24px;border-right:1px solid var(--line)}.brand{display:flex;gap:12px;font-weight:700;font-size:32px;align-items:center}.brand span{font-size:17px;line-height:1.5}.brand small{display:block;font-size:8px;letter-spacing:1.5px;font-weight:400;margin-top:5px}nav{display:grid;gap:9px;margin-top:48px}button{font:inherit;cursor:pointer;border:0;border-radius:8px;padding:10px 17px}nav button{text-align:left;background:transparent;color:var(--muted);padding:13px 18px}nav button.active{background:var(--ink);color:#fff}.side-note{margin-top:70px;color:var(--muted);font-size:13px}.version{position:absolute;bottom:30px;font-size:12px;color:var(--muted)}main{margin-left:244px;max-width:1450px;padding:25px 48px 30px}header{display:flex;justify-content:space-between;color:var(--muted);font-size:13px}.pill{border:1px solid var(--line);border-radius:40px;padding:3px 12px;font-size:12px;display:inline-block}.hero{display:flex;justify-content:space-between;align-items:center;padding:42px 0 30px}.eyebrow{font-size:11px;letter-spacing:1.5px;color:var(--green)}h1{font-size:38px;letter-spacing:-1px;margin:10px 0}h2{font-size:21px;margin:0}h3{font-size:18px;margin:0 0 12px}.hero p{color:var(--muted);margin:0}.hero-art{display:flex;align-items:center;gap:8px;font-size:13px}.hero-art span{width:65px;height:65px;display:grid;place-items:center;background:#dfe8c8;border-radius:50%}.hero-art b{font-weight:400;color:var(--green)}.notice{background:#ecf0e4;border-left:3px solid #a9bd7c;padding:12px 16px;font-size:12px;color:var(--muted);margin-bottom:30px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:20px}.switch{font-size:13px;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-bottom:20px}.panel{background:#fff;border:1px solid var(--line);padding:26px;border-radius:14px;margin-bottom:18px}.grid .panel{margin:0}.card-tag{font-size:12px;color:var(--green);display:flex;justify-content:space-between;margin-bottom:12px}.panel p{margin:10px 0}.muted{color:var(--muted);font-size:13px}.primary{background:var(--green);color:#fff;margin-top:12px}.secondary{background:#e9eee5;color:var(--ink)}.flow{display:flex;flex-wrap:wrap;gap:12px}.flow span{padding:8px 12px;border-radius:5px;background:var(--bg);font-size:13px}.hidden{display:none!important}textarea,input,select{font:inherit;border:1px solid var(--line);border-radius:7px;background:#fff;padding:8px;color:var(--ink)}textarea{display:block;width:100%;resize:vertical;line-height:1.8;margin:15px 0}input[type=number]{width:65px}input[type=checkbox]{accent-color:var(--green)}.controls{display:flex;gap:16px;align-items:center;flex-wrap:wrap;font-size:13px}.controls .primary{margin:0}hr{border:0;border-top:1px solid var(--line);margin:25px 0}details{margin:15px 0}summary{cursor:pointer}.record{margin:15px 0}.answer{white-space:pre-wrap;padding:12px;background:var(--bg);border-radius:7px;font-size:14px}.badge{font-size:11px;background:#f1efd7;color:#807331;border-radius:4px;padding:3px 7px}.file{background:#e9eee5;padding:10px;border-radius:8px;cursor:pointer}.file input{display:none}.material{padding:13px 0;border-bottom:1px solid var(--line)}.material small{display:block;color:var(--muted)}footer{margin-top:30px;font-size:12px;color:var(--muted)}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #a8c4b6;outline-offset:3px}@media(max-width:850px){aside{position:static;width:100%;padding:18px}.brand{font-size:26px}nav{display:flex;flex-wrap:wrap;margin-top:15px;gap:3px}nav button{padding:8px 10px;font-size:12px}.side-note,.version{display:none}main{margin:0;padding:22px}.hero{padding:25px 0}.hero-art{display:none}h1{font-size:29px}.grid{grid-template-columns:1fr}.section-head{flex-wrap:wrap}.panel{padding:20px}}
h4{font-size:14px;margin:25px 0 6px;color:var(--green)}.lesson-full p{line-height:1.95}.vocab-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.word{background:var(--bg);padding:18px;border-radius:9px}.word div{display:flex;justify-content:space-between;gap:12px}.word b{font-size:20px}.word span{font-size:13px;color:var(--muted)}.word p{font-size:14px}.word a{font-size:12px;color:var(--green);margin-left:10px}.speak{font-size:12px;padding:5px 8px;background:#dce8d7}.table-scroll{overflow:auto}table{border-collapse:collapse;width:100%;font-size:12px}th,td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:left;min-width:110px}th{background:var(--bg)}a{color:var(--green)}@media(max-width:850px){nav{position:sticky;top:0;background:#e9ede3;z-index:2}.vocab-grid{grid-template-columns:1fr}.lesson-full{padding:22px 19px}.lesson-full p{font-size:16px;line-height:2}textarea{font-size:16px}select,input{font-size:16px}.controls{gap:10px}h4{margin-top:24px}}
.chapter-link{display:block;padding:5px 0;font-size:14px}.case{background:#eef2e5;padding:16px;border-radius:8px;margin:20px 0}.term{background:#e8eee0;font-size:12px;padding:7px 10px;margin:4px}.english-story{font-family:Georgia,serif;font-size:20px;line-height:2;margin-top:22px}.inline-word{display:inline;background:transparent;color:var(--green);padding:0;font:inherit;text-decoration:underline;text-decoration-color:#c3d6bb;text-underline-offset:4px}.context-word{border-bottom:1px solid var(--line);padding:10px}.chat{padding:18px;margin:15px 0;border-radius:9px;background:#edf2e6}.chat.user{background:#f3f4f0}.chat div{white-space:pre-wrap;margin-top:8px;line-height:1.9}#market-graph svg{max-width:560px;width:100%;height:auto}#deep-chapter .panel p{line-height:2}#deep-chapter h3{margin-top:10px}#glossary-result{margin:15px 0}@media(max-width:850px){.english-story{font-size:19px}.chat{padding:15px}#deep-chapter .panel p{font-size:16px}}

nav .english-workbench-link{display:block;color:var(--ink);padding:13px 18px;font-weight:700}
@media(max-width:820px){nav .english-workbench-link{padding:8px 10px;font-size:12px}}