@import url('data:text/css,');
:root{--green:#244d3f;--lime:#e9efcf;--paper:#f7f8f2;--ink:#253d34;--muted:#718077}*{box-sizing:border-box}body{margin:0;background:var(--paper);font-family:Arial,sans-serif;color:var(--ink)}button,a,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer;border:1px solid #dbe2d8;background:white;border-radius:12px;padding:12px 18px;color:var(--ink)}button:hover{background:#e8efdf}a{color:inherit;text-decoration:none}aside{position:fixed;width:232px;top:0;bottom:0;padding:36px 24px;border-right:1px solid #e2e7dc;background:#fff}aside small{font-size:9px;letter-spacing:2px;display:block;margin-top:17px}.brand{font-size:28px;font-weight:bold;display:flex;align-items:center;gap:8px}.brand>span:first-child{font-size:18px;background:var(--green);color:white;padding:10px;border-radius:12px}.dot{color:#b99a58}nav{display:grid;gap:10px;margin-top:44px}nav a{padding:14px;border-radius:10px;font-size:14px}nav a.active{background:var(--green);color:white}.aside-note{margin-top:42px;background:var(--lime);border-radius:16px;padding:20px;font-size:13px;line-height:1.6}.han{font-size:76px;text-align:right;opacity:.35}#profile{margin-top:20px;width:100%;font-size:12px}.shell{margin-left:232px}header{height:89px;display:flex;align-items:center;justify-content:space-between;padding:0 48px;border-bottom:1px solid #e2e7dc}header>span{font-size:10px;letter-spacing:2px}main{max-width:1200px;margin:auto;padding:38px 48px;min-height:80vh}h1{font-size:36px;letter-spacing:-1px;margin:12px 0}h2{font-size:23px}h3{margin:12px 0;font-size:18px}p{line-height:1.7;color:var(--muted)}.eyebrow{font-size:11px;letter-spacing:2px;color:#7d8978}.hero{background:var(--green);color:white;border-radius:26px;padding:38px;display:grid;grid-template-columns:1.8fr 1fr;margin:28px 0;overflow:hidden}.hero h2{font-size:34px;line-height:1.2;margin:14px 0}.hero p{color:#d4dfd4;max-width:450px}.hero .primary{background:var(--lime);color:var(--green)}.art{display:grid;place-content:center;text-align:center;transform:rotate(-8deg)}.art strong{font-size:100px;color:var(--lime);font-weight:normal}.art small{letter-spacing:4px;margin-top:8px}.primary{background:var(--green);color:white;border:0}.primary:hover{background:#38634c;color:white}.row{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.stat,.card{background:white;border:1px solid #e1e6db;border-radius:18px;padding:24px}.stat strong{display:block;font-size:28px;margin-bottom:9px}.stat span{font-size:12px;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:20px 0}.icon{font-size:26px;background:#f0f3e7;display:inline-block;padding:12px;border-radius:14px}.card p{font-size:13px}.tag{font-size:10px;letter-spacing:1px;color:#809079}.card button{width:100%;margin-top:12px}.bar{height:7px;background:#e9eddf;border-radius:8px;overflow:hidden;margin:12px 0}.bar i{display:block;background:#86a46c;height:100%}.word{display:grid;grid-template-columns:1fr 1fr 1fr auto;align-items:center;padding:17px 0;border-bottom:1px solid #edf0e9;gap:12px}.word strong{font-size:26px}.flash{text-align:center;max-width:650px;margin:25px auto;padding:48px;background:white;border:1px solid #e1e6db;border-radius:24px}.flash .cn{font-size:72px;margin:30px}.flash .meaning{font-size:24px}.options{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:25px 0}.options button{padding:22px}.correct{background:#e3f1df!important;border-color:#63a16d!important}.wrong{background:#fff0eb!important;border-color:#d98976!important}.feedback{padding:20px;border-radius:12px;background:#eef2e6;line-height:1.6;margin:18px 0}.quiz-cn{font-size:46px;margin:24px 0;text-align:center}.history{width:100%;border-collapse:collapse}td,th{padding:14px;text-align:left;border-bottom:1px solid #e4e8dc;font-size:14px}label{display:block;margin:20px 0}input,select{padding:12px;border:1px solid #cfd9cb;border-radius:10px;width:100%;margin-top:8px;background:white}select{max-width:360px}dialog{border:0;border-radius:24px;max-width:440px;width:90%;padding:32px}dialog::backdrop{background:#193c30aa}dialog button{width:100%}footer{padding:20px 48px;color:var(--muted);font-size:11px}#toast{position:fixed;bottom:24px;left:50%;background:var(--green);color:white;padding:14px 22px;border-radius:14px;display:none;z-index:10}.empty{padding:30px;text-align:center}.small{font-size:12px}.canvas{border:1px solid #cbd5c4;width:280px;height:280px;touch-action:none;background:linear-gradient(90deg,transparent 49.5%,#e8ecdf 50%,transparent 50.5%),linear-gradient(transparent 49.5%,#e8ecdf 50%,transparent 50.5%)}button:focus-visible,a:focus-visible{outline:3px solid #c5a353;outline-offset:4px}@media(max-width:950px){aside{width:190px;padding:28px 16px}.shell{margin-left:190px}main{padding:24px}.grid{grid-template-columns:repeat(2,1fr)}header{padding:0 24px}}@media(max-width:800px){aside{position:static;width:100%;padding:18px}.shell{margin-left:0}aside small,.aside-note,#profile{display:none}nav{display:flex;overflow:auto;margin-top:18px;gap:5px}nav a{white-space:nowrap;padding:10px;font-size:12px}header{height:65px}.hero{padding:24px;grid-template-columns:1fr}.art{display:none}.hero h2{font-size:29px}h1{font-size:29px}.grid{grid-template-columns:1fr}.stats{gap:8px}.stat{padding:15px}.stat strong{font-size:23px}.word{grid-template-columns:1fr 1fr}.options{grid-template-columns:1fr}main{padding:22px 16px}.flash{padding:25px}.history{display:block;overflow:auto}}