:root{--paper:#f6f4ed;--ink:#253e37;--muted:#73817a;--green:#20584d;--mint:#e0eee4;--orange:#c4593f;--line:#e1e5dc;font-family:Inter,'Segoe UI','Microsoft YaHei',sans-serif;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}body{margin:0;background:var(--paper);font-size:15px}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer;min-height:44px;border:1px solid var(--line);border-radius:12px;background:white;color:var(--ink);padding:10px 16px;font-weight:650}button:hover{border-color:#739b86;background:#f0f7ef}button:disabled{opacity:.5;cursor:default}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #db9c36;outline-offset:3px}p{line-height:1.6}h1,h2,h3{color:var(--ink);line-height:1.15}h1{font-family:Georgia,'Microsoft YaHei',serif;font-size:clamp(30px,3vw,44px);font-weight:500;margin:8px 0 16px}h2{font-size:22px;margin:6px 0 16px}h3{font-size:18px;margin:8px 0}.proposal{padding:8px 24px;background:#e9e4d6;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:11px;letter-spacing:.06em}.proposal button{font-size:11px;padding:4px 10px;min-height:32px;background:transparent}.app{max-width:1560px;margin:auto;display:grid;grid-template-columns:230px minmax(0,1fr);min-height:calc(100vh - 50px)}aside{background:#fffef9;border-right:1px solid var(--line);padding:32px 20px;display:flex;flex-direction:column;gap:36px}.brand{display:flex;gap:12px;align-items:center;font-size:21px;font-weight:750}.brand small{display:block;font-size:10px;letter-spacing:.2em;margin-top:5px;color:var(--muted)}.seal{display:grid;place-items:center;background:var(--orange);color:#fff;width:43px;height:48px;border-radius:12px 4px 12px 4px;font-size:27px}nav{display:grid;gap:9px;position:sticky;top:20px}nav a{padding:14px 16px;border-radius:12px;font-weight:650;display:flex;align-items:center;gap:14px}nav a[aria-current=page]{color:var(--green);background:var(--mint)}nav .icon{font-size:22px;width:24px}.side-bottom{margin-top:auto;display:grid;gap:8px}.side-bottom button{text-align:left;border:0;background:transparent;font-size:13px}.side-bottom p{font-size:11px;color:var(--muted);padding-left:12px}.body{min-width:0}.body>header{max-width:none;margin:0;height:84px;padding:20px 36px;border:0;display:flex;align-items:center;justify-content:space-between;background:transparent;font-size:13px;color:var(--muted)}header>div{display:flex;align-items:center;gap:14px}.avatar{background:#f0d6b5;color:#78512d;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-weight:bold}.point-pill{background:#f1e8cb;color:#795c17;border:0;font-size:12px;min-height:36px}main{max-width:1200px;margin:0 auto;padding:12px 36px 48px}.eyebrow{color:var(--orange);letter-spacing:.14em;font-size:10px;font-weight:800;margin:0 0 8px}.muted,.caption{color:var(--muted)}.caption{font-size:12px}.welcome,.section-head,.row,.toolbar,.actions{display:flex;justify-content:space-between;align-items:center;gap:12px}.actions,.toolbar{justify-content:flex-start;flex-wrap:wrap}.welcome{margin-bottom:24px}.welcome p{margin:0}.tag{display:inline-block;border-radius:6px;padding:5px 8px;background:var(--mint);color:var(--green);font-size:11px;font-weight:700}.tag.amber{background:#fff0d2;color:#836023}.hero{background:var(--green);color:#fff;border-radius:24px;padding:32px;display:grid;grid-template-columns:1fr 180px;gap:20px;position:relative;overflow:hidden}.hero h2{color:#fff;font-size:30px;font-family:Georgia,serif;font-weight:500;margin:12px 0}.hero p{color:#d4e5dc;max-width:410px}.hero .eyebrow{color:#e6cb9e}.primary{background:var(--green);color:white;border-color:var(--green)}.primary:hover{background:#347364;color:white}.hero .primary{background:#fff3d8;color:#31584b;border:0}.paper-art{display:grid;place-items:center;position:relative;min-height:150px}.paper-art span{display:grid;place-items:center;width:100px;height:120px;border:1px solid #cdbca1;border-radius:8px;background:#fff7e5;color:var(--green);font-family:serif;font-size:60px;transform:rotate(-12deg);box-shadow:15px 10px 0 #83aa8e}.paper-art small{position:absolute;bottom:10px;right:5px;color:#eacb8e;font-size:23px}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px}.card{background:#fffef9;border:1px solid var(--line);border-radius:20px;padding:24px;min-width:0;box-shadow:none}.card p{margin:8px 0 16px}.card-icon{width:42px;height:42px;border-radius:12px;background:var(--mint);color:var(--green);display:grid;place-items:center;font-size:23px;margin-bottom:16px}.card-icon.orange{background:#f7e3d5;color:var(--orange)}.section-head{margin:28px 0 12px}.section-head h2{margin:0}.text-button{border:0;background:transparent;color:var(--green);padding:8px;font-size:13px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}.stat{padding:20px;background:#fffef9;border:1px solid var(--line);border-radius:16px}.stat strong{display:block;font-family:Georgia,serif;font-size:30px;font-weight:500}.stat span{display:block;color:var(--muted);font-size:12px;margin-top:7px}.band-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(75px,1fr));gap:9px;margin:20px 0}.band-grid button{display:grid;gap:7px;min-height:70px;font-size:18px;background:#fffef9}.band-grid small{font-size:10px;font-weight:400;color:var(--muted)}.band-grid button.active{background:var(--green);color:white}.band-grid button.active small{color:#e1eade}.notice{background:#f0eddf;color:#645f48;padding:14px 18px;font-size:13px;line-height:1.6;border:0;border-radius:12px;margin:16px 0}.filters{display:flex;align-items:end;flex-wrap:wrap;gap:12px;margin:18px 0}.filters label{font-size:11px;font-weight:700;display:grid;gap:7px;flex:1;min-width:140px}.filters input,.filters select{border:1px solid var(--line);border-radius:10px;padding:12px;background:white;width:100%;min-height:44px}.chips{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.chips button{border-radius:30px;font-size:12px}.chips button.active{background:var(--green);color:white}.word-list{background:white;border:1px solid var(--line);border-radius:16px;overflow:hidden}.word-row{display:grid;grid-template-columns:28px minmax(80px,1fr) minmax(80px,1fr) 44px 110px;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line);width:100%;text-align:left}.word-row:last-child{border:0}.word-row input{width:20px;height:20px;accent-color:var(--green)}.word-link{background:transparent;border:0;padding:0;display:flex;gap:14px;align-items:center;text-align:left;font-weight:400}.hanzi{font-family:'Microsoft YaHei',serif;font-size:28px;color:var(--ink);white-space:nowrap}.word-link small{display:block;color:var(--muted);font-size:11px;margin-top:3px}.star{border:0;padding:5px;font-size:23px;background:transparent;color:#a7ada7}.star.on{color:#b87b16}.add{font-size:11px;padding:8px}.status{font-size:11px;color:var(--muted)}.source-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:20px 0}.source-card{display:block;text-align:left;padding:22px;background:white;border-radius:18px}.source-card .glyph{font-size:29px;display:block;margin-bottom:15px}.source-card small{display:block;color:var(--muted);font-weight:400;font-size:12px;line-height:1.6}.source-card strong{display:block;margin-bottom:6px}.skill-row{display:grid;grid-template-columns:160px 1fr 75px;align-items:center;gap:15px;margin:20px 0;font-size:13px}.bar{height:9px;border-radius:20px;background:#edf0e9;overflow:hidden}.bar i{display:block;background:#659581;height:100%}.satellite{display:grid;grid-template-columns:repeat(auto-fill,minmax(32px,1fr));gap:6px}.satellite button{min-height:40px;padding:4px;font-size:15px;background:#eff1eb;border:0;border-radius:6px}.satellite button.explored{background:#b9d7c2}.empty{text-align:center;padding:40px;color:var(--muted)}.session{max-width:740px;margin:auto;text-align:center}.session .prompt{font-size:76px;line-height:1.4;margin:35px 0 10px}.session .actions{justify-content:center}.session .answer{padding:20px;background:#eff5e9;border-radius:14px;margin-bottom:22px}.session .answer strong{font-size:24px;display:block}.session canvas{display:block;width:min(280px,100%);height:220px;border:1px dashed #a7bcb0;margin:15px auto;background:linear-gradient(90deg,transparent 49.5%,#e6ede4 50%,transparent 50.5%),linear-gradient(transparent 49.5%,#e6ede4 50%,transparent 50.5%);touch-action:none}.check{display:flex;gap:12px;align-items:start;margin:18px 0;line-height:1.5}.check input{width:20px;height:20px}.history-row{padding:16px 0;border-bottom:1px solid var(--line)}.history-row p{margin:3px 0;color:var(--muted);font-size:12px}.history-row strong{font-size:14px}.score{color:#8e6d1d;font-size:24px;font-weight:800}dialog{max-width:650px;width:calc(100% - 28px);max-height:90vh;border:0;border-radius:22px;padding:32px;color:var(--ink)}dialog::backdrop{background:#132a2580}.close{float:right;background:#f2f2ed;border:0;font-size:24px;padding:4px 12px}#detail-body h2{font-size:48px;font-family:serif;margin-top:20px}#toast{position:fixed;bottom:90px;left:50%;transform:translateX(-50%);background:#263f37;color:white;padding:14px 22px;border-radius:12px;max-width:90vw;z-index:100;display:none}#toast.show{display:block}.body>footer{text-align:center;font-size:10px;color:var(--muted);padding:18px}.book{padding:30px;background:#eee7d3;border-radius:14px;text-align:center;margin:15px 0}.book p{font-size:24px;letter-spacing:.1em}.book .word-link{display:inline-block;padding:8px}.toggle{display:flex;gap:8px;align-items:center}.parent-meta{font-size:12px;line-height:1.7}main:focus{outline:none}
@media(max-width:1050px){.app{grid-template-columns:190px minmax(0,1fr)}aside{padding:25px 12px}.brand{font-size:18px}main{padding:10px 24px 35px}.source-grid{grid-template-columns:repeat(2,1fr)}.hero{grid-template-columns:1fr 115px;padding:25px}.paper-art span{width:80px;height:100px;font-size:48px}.word-row{grid-template-columns:24px minmax(90px,1fr) 44px 90px}.word-row>.status{display:none}.skill-row{grid-template-columns:130px 1fr 55px}}
@media(max-width:700px){.proposal{padding:7px 12px;font-size:9px;letter-spacing:0}.proposal span{max-width:175px}.app{display:block}aside{padding:0;border:0;background:none;display:block}.brand,.side-bottom{display:none}nav{position:fixed;top:auto;left:0;right:0;bottom:0;z-index:30;grid-template-columns:repeat(4,1fr);gap:0;padding:6px 4px max(7px,env(safe-area-inset-bottom));background:#fffef9;border-top:1px solid var(--line)}nav a{display:grid;place-items:center;gap:3px;padding:5px 2px;font-size:10px;border-radius:10px}nav .icon{font-size:20px;text-align:center}.body>header{height:68px;padding:12px 18px;font-size:11px}.body>header>div{gap:8px}.point-pill{font-size:10px;padding:8px}.avatar{width:30px;height:30px}main{padding:8px 18px 40px}.welcome{display:block;margin-bottom:20px}.welcome .tag{margin-top:14px}.hero{grid-template-columns:1fr 75px;padding:23px 20px;gap:4px}.hero h2{font-size:26px}.hero p{font-size:13px}.paper-art span{width:65px;height:85px;font-size:38px}.paper-art small{right:0}.grid2{grid-template-columns:1fr;gap:12px}.card{padding:20px}.stats{gap:8px}.stat{padding:15px 10px}.stat strong{font-size:25px}.stat span{font-size:10px}.source-grid{gap:10px}.source-card{padding:16px}.source-card strong{font-size:13px}.word-row{padding:12px 10px;gap:8px;grid-template-columns:22px minmax(95px,1fr) 36px 76px}.word-link{gap:7px;flex-wrap:wrap}.word-link small{font-size:10px}.hanzi{font-size:24px}.word-row .add{font-size:10px;padding:5px}.word-row .star{font-size:21px}.skill-row{grid-template-columns:115px 1fr 40px;gap:8px;font-size:11px}.body>footer{padding-bottom:95px}.actions button{flex:1}.section-head{gap:8px}.section-head h2{font-size:20px}.session .prompt{font-size:68px}.session .actions{display:grid;grid-template-columns:1fr}.toolbar button{font-size:12px}.band-grid{grid-template-columns:repeat(5,1fr)}.band-grid button{font-size:16px;padding:6px}.band-grid small{font-size:9px}.filters label{min-width:110px}.mobile-tools{display:flex;gap:8px;margin-top:18px}.mobile-tools button{font-size:11px;flex:1}dialog{padding:22px}.book{padding:20px 10px}}
@media(min-width:701px){.mobile-tools{display:none}}