@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Noto+Sans+TC:wght@400;500;600;700&display=swap');
:root{--ink:#183d36;--muted:#74807b;--green:#174b43;--bg:#f5f6f1;--line:#e1e6dd;--lime:#d8eaae;--orange:#b87648}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:'DM Sans','Noto Sans TC',sans-serif;font-size:14px}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:1px solid var(--line);border-radius:10px;background:white;color:var(--ink);padding:11px 17px;transition:.18s}button:hover{background:#edf2e7;transform:translateY(-1px)}button:disabled{opacity:.45;cursor:default}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #b7ce81;outline-offset:3px}aside{width:238px;background:#fff;height:100vh;position:fixed;padding:35px 23px;display:flex;flex-direction:column;border-right:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-size:22px;letter-spacing:-1px}.brand small{display:block;font-size:11px;letter-spacing:2px;margin-top:4px;color:var(--muted)}.logo{background:var(--green);color:#e4edbc;border-radius:15px;font-size:39px;line-height:52px;width:52px;text-align:center}.nav-label{font-size:9px;letter-spacing:2px;color:#9ba59f;margin:45px 10px 15px}nav a{display:flex;gap:12px;align-items:center;padding:14px 17px;margin-bottom:6px;border-radius:10px;color:#727e78}nav a.active{color:var(--green);background:#eaf0e5;font-weight:700}nav i{font-style:normal;width:22px;font-size:18px}.aside-bottom{margin-top:auto;color:var(--muted);font-size:12px;padding:20px 7px 0}.aside-bottom p{line-height:1.9}.status-dot{display:inline-block;width:7px;height:7px;background:#74a381;border-radius:50%;margin-right:7px}.shell{margin-left:238px}header{height:83px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 45px;background:#fafbf7}.header-right{display:flex;gap:20px;align-items:center}.pill{border:1px solid var(--line);padding:7px 13px;border-radius:30px;font-size:11px}.avatar{width:33px;height:33px;display:grid;place-items:center;background:#e8dfcf;border-radius:50%}main{max-width:1360px;margin:auto;padding:36px 45px;min-height:80vh}h1{font-size:29px;letter-spacing:-1px;margin:6px 0 10px}h2{font-size:21px;margin:0 0 16px}h3{font-size:17px;margin:10px 0}p{line-height:1.8}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:600;color:var(--muted);text-transform:uppercase}.muted{color:var(--muted)}.row{display:flex;align-items:center;justify-content:space-between;gap:15px}.section-head{margin:30px 0 16px}.section-head h2{margin:0}.hero{margin-top:27px;background:var(--green);color:#fff;border-radius:20px;padding:34px 38px;display:grid;grid-template-columns:1.5fr 1fr;gap:20px;position:relative;overflow:hidden}.hero h2{font-size:31px;line-height:1.5;margin-top:12px;letter-spacing:-1px}.hero p{color:#c1d1c8}.hero .eyebrow{color:#c8dda1}.primary{background:var(--green);color:white;border-color:var(--green)}.primary:hover{background:#236355;color:white}.hero .primary{background:var(--lime);color:var(--green);border:0}.hero-art{display:flex;align-items:center;justify-content:center;position:relative}.orbit{width:205px;height:205px;border:1px solid #638375;border-radius:50%;display:grid;place-items:center;position:relative}.orbit:before{content:'';position:absolute;inset:22px;border:1px dashed #60816b;border-radius:50%}.orbit div{text-align:center;z-index:1}.orbit strong{font-size:48px;color:var(--lime);display:block;font-weight:500}.orbit small{letter-spacing:3px;color:#d0deca}.orbit span{position:absolute;padding:9px 13px;background:#f1f3dc;color:var(--green);border-radius:9px;font-size:11px;box-shadow:0 8px 25px #123b35}.orbit span:nth-of-type(1){top:15px;left:-45px;transform:rotate(-8deg)}.orbit span:nth-of-type(2){right:-35px;bottom:25px;transform:rotate(8deg)}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:22px}.stat,.card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:22px}.stat strong{display:block;font-size:27px;margin:7px 0 3px;font-weight:500}.stat small{font-size:11px;color:var(--muted)}.stat .eyebrow{letter-spacing:0}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.skill-card{min-height:193px;display:flex;flex-direction:column;text-align:left}.skill-card .icon{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;font-size:21px;background:#edf1dc}.skill-card:nth-child(2) .icon{background:#f5e9db}.skill-card:nth-child(3) .icon{background:#e6e9f4}.skill-card:nth-child(4) .icon{background:#f4e4e3}.skill-card p{font-size:11px;color:var(--muted);margin:3px 0 15px}.skill-card .skill-bottom{margin-top:auto;font-size:11px;color:var(--muted);display:flex;justify-content:space-between;width:100%}.twocol{display:grid;grid-template-columns:1.45fr 1fr;gap:22px}.task{display:flex;gap:14px;align-items:center;border-bottom:1px solid var(--line);padding:16px 0}.task:last-child{border:0}.task .number{background:#f0f3e9;color:#81966c;padding:10px;border-radius:10px}.task p{margin:3px 0;color:var(--muted);font-size:12px}.task button{margin-left:auto;white-space:nowrap}.quote{background:#eeeee1;border:0}.quote blockquote{font-size:20px;line-height:1.6;margin:22px 0}.progress{height:5px;background:#ebeee6;border-radius:4px;overflow:hidden;margin:16px 0 8px}.progress div{height:100%;background:#8aa96c}.filters{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}.filters input{flex:1;min-width:190px}input,select,textarea{padding:12px 14px;border:1px solid #dce2d6;border-radius:9px;background:#fff;color:var(--ink)}textarea{width:100%;min-height:130px;line-height:1.8;resize:vertical}.chips{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.chips button.active{background:var(--green);color:white}.library-grid,.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.doc{display:flex;flex-direction:column;gap:10px;text-align:left;min-height:180px}.doc .tag,.tag{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:#7a8d6d}.doc h3{font-size:14px;line-height:1.7;margin:0}.doc small{color:var(--muted);margin-top:auto}.doc .en{font-size:11px;color:var(--muted)}.lesson-grid{grid-template-columns:repeat(2,1fr)}.lesson{line-height:1.9}.lesson blockquote{margin:15px 0;padding:15px;background:#f1f4e9;border-left:3px solid #adc289;border-radius:4px}.lesson .english{color:#77847c;font-size:13px}.flash{min-height:310px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;max-width:720px;margin:25px auto;background:#fff}.flash h2{font-size:38px;margin:28px 0 10px}.flash .answer{font-size:21px}.center{text-align:center}.actions{display:flex;gap:10px;justify-content:center;margin:18px 0;flex-wrap:wrap}.practice-tabs{margin:24px 0}.answer-option{display:block;width:100%;text-align:left;margin:10px 0}.feedback{padding:16px;background:#edf3e4;border-radius:9px;margin:15px 0;line-height:1.8}.error{background:#faede5}.timer{font-size:60px;letter-spacing:3px;font-variant-numeric:tabular-nums;margin:20px 0}.checklist label{display:flex;gap:12px;align-items:start;line-height:1.7;padding:11px 0}.checklist input{accent-color:var(--green);margin-top:5px}.plan-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:10px;margin-top:25px}.day{padding:17px 12px;min-height:120px}.day.done{background:#e7efd9}.day small{display:block;color:var(--muted);margin:8px 0}.day strong{font-size:20px}.sources a{display:block;padding:17px;border-bottom:1px solid var(--line);line-height:1.8}.sources small{display:block;color:var(--muted)}dialog{width:min(950px,95vw);max-height:92vh;border:1px solid var(--line);border-radius:18px;color:var(--ink);padding:25px;background:var(--bg)}dialog::backdrop{background:#122d29aa}.reader-head{display:flex;justify-content:space-between;align-items:start;gap:15px}.reader-head h2{font-size:18px}.reader-tools{display:flex;gap:8px;align-items:center;flex-wrap:wrap;position:sticky;top:-25px;background:var(--bg);padding:12px 0}#page-content{white-space:pre-wrap;line-height:1.9;background:white;padding:25px;border-radius:10px;margin-bottom:20px;overflow-wrap:anywhere}#page-content img{width:100%;display:block}.reader-head button{padding:7px 12px}#source-name{font-size:11px;overflow-wrap:anywhere}#doc-note{margin:10px 0}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:13px 24px;border-radius:30px;background:#173f38;color:white;display:none;z-index:20;max-width:90vw}footer{font-size:10px;line-height:1.9;color:#90998f;padding:20px 45px 30px}.empty{padding:45px;text-align:center;color:var(--muted)}.writing{min-height:400px}.wide{grid-column:1/-1}details{line-height:1.9;margin:14px 0}summary{cursor:pointer}.source-ref{font-size:11px;color:var(--muted)}@media(min-width:1500px){main{padding-top:45px}.hero{padding:45px}.hero h2{font-size:36px}}@media(max-width:1100px){aside{width:195px;padding:27px 15px}.shell{margin-left:195px}main{padding:28px}header{padding:0 28px}.grid{grid-template-columns:repeat(2,1fr)}.library-grid{grid-template-columns:repeat(2,1fr)}.hero-art{transform:scale(.85)}.plan-grid{grid-template-columns:repeat(4,1fr)}}@media(max-width:720px){aside{position:static;width:100%;height:auto;padding:16px;border:0}.brand{font-size:19px}.logo{width:40px;line-height:40px;font-size:30px}.nav-label,.aside-bottom{display:none}nav{display:flex;overflow-x:auto;margin-top:16px;gap:5px}nav a{padding:10px;white-space:nowrap;font-size:12px;margin:0;gap:5px}nav i{font-size:14px;width:16px}.shell{margin:0}header{height:52px;padding:0 20px;font-size:12px}.header-right .pill{display:none}main{padding:24px 18px}h1{font-size:26px}.hero{padding:25px;grid-template-columns:1fr;margin-top:20px}.hero-art{display:none}.hero h2{font-size:27px}.stats{grid-template-columns:repeat(2,1fr);gap:10px}.stat{padding:17px}.stat strong{font-size:25px}.twocol,.lesson-grid,.library-grid{grid-template-columns:1fr}.grid{gap:10px}.skill-card{padding:17px;min-height:170px}.plan-grid{grid-template-columns:repeat(2,1fr)}footer{padding:20px}.row{flex-wrap:wrap}.flash h2{font-size:30px}.section-head{margin-top:25px}.timer{font-size:48px}.reader-tools button{padding:8px}.reader-tools{font-size:12px}#page-content{padding:15px}}