:root{--ink:#152c2b;--muted:#687774;--green:#176c57;--lime:#d6ed91;--line:#dce2d9;--paper:#f5f6f0;--white:#fff;--red:#a73333}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;font-size:14px;line-height:1.65}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #8ab8a8;outline-offset:3px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:22px 5%;background:#fff;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font-weight:750;font-size:20px;white-space:nowrap}.brand-icon{color:var(--green);font-size:32px;line-height:1}.brand small{font-size:9px;letter-spacing:2px;border-left:1px solid var(--line);padding-left:10px;margin-left:3px}.topbar nav{display:flex;gap:25px;color:var(--muted);font-size:13px}.topbar nav a:hover{color:var(--green)}.account{display:flex;align-items:center;gap:12px;font-size:12px}.account form{margin:0}.env-banner{text-align:center;padding:7px;background:#e7eccc;color:#52632c;font-size:12px;letter-spacing:.6px}main{max-width:1320px;margin:auto;padding:36px 42px 64px}.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:45px;align-items:center;padding:30px 0 48px}.eyebrow{font-size:11px;letter-spacing:2px;color:var(--green);font-weight:700;margin-bottom:15px}h1,h2,h3,p{margin-top:0}h1{font-size:42px;line-height:1.35;letter-spacing:-1.5px;margin-bottom:22px}.hero h1{font-size:49px}.hero h1 span{color:var(--green)}p{color:var(--muted);margin-bottom:20px}.hero-copy>p{font-size:15px;max-width:460px}.tags{display:flex;gap:8px;flex-wrap:wrap;margin:25px 0}.tags span{font-size:11px;border:1px solid #d8dfd1;padding:4px 10px;border-radius:4px}.hero-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin:24px 0 14px}.hero-actions form{margin:0}.primary,.secondary{display:inline-flex;gap:24px;align-items:center;justify-content:center;min-height:44px;padding:11px 22px;border-radius:6px;font-weight:600;border:1px solid transparent;line-height:1.5}.primary{background:var(--green);color:white}.primary:hover{background:#0e5544}.secondary{background:transparent;border-color:#c9d3c8;color:var(--ink)}.secondary:hover{background:#e8ece3}.small{padding:8px 16px;min-height:36px;font-size:12px}.micro{font-size:11px;color:var(--muted)}.hero-art{height:370px;border-radius:12px;background:#dfe7dc;position:relative;overflow:hidden;isolation:isolate}.art-grid{position:absolute;inset:0;background-image:linear-gradient(#b0c4b355 1px,transparent 1px),linear-gradient(90deg,#b0c4b355 1px,transparent 1px);background-size:32px 32px;transform:perspective(450px) rotateX(45deg) rotateZ(-20deg) scale(1.6);opacity:.8}.platform{position:absolute;background:#305e4d;transform:rotate(-28deg) skewX(24deg);box-shadow:-14px 18px 0 #163b31, -30px 35px 35px #48685845;border:1px solid #47715e}.platform-a{width:190px;height:140px;left:130px;top:130px}.platform-b{width:95px;height:90px;left:100px;top:87px;background:#95bc8a;box-shadow:-12px 15px 0 #60805d}.platform-c{width:66px;height:75px;left:285px;top:175px;background:#d6ed91;box-shadow:-12px 15px 0 #8d9f60}.orb{position:absolute;border-radius:50%;z-index:2}.orb-one{width:80px;height:80px;left:210px;top:88px;background:radial-gradient(circle at 30% 25%,#e9f4c0,#a1bb63 70%,#79934b);box-shadow:5px 30px 15px #152c2b30}.orb-two{width:20px;height:20px;left:350px;top:100px;background:#4c7965}.art-label{position:absolute;bottom:25px;left:25px;font-size:21px;font-weight:700;line-height:1.1;letter-spacing:1px}.art-label span{display:block;font-size:8px;letter-spacing:2px;margin-top:10px;font-weight:400}.art-coordinate{position:absolute;right:18px;top:16px;font-size:9px;letter-spacing:2px}.stat-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr);padding:24px 0;margin-bottom:55px}.stat-strip>div{padding:0 25px;border-right:1px solid var(--line)}.stat-strip>div:first-child{padding-left:0}.stat-strip>div:last-child{border:0}.stat-strip b{display:block;font-size:18px;margin-bottom:3px}.stat-strip span{color:var(--muted);font-size:12px}.section-head{display:flex;justify-content:space-between;gap:25px;align-items:center;margin:25px 0}.section-head h2{font-size:26px;margin-bottom:0}.section-head p{max-width:340px;font-size:12px;margin:0}.curriculum{display:grid;grid-template-columns:1fr 1fr;gap:12px}.lesson{display:flex;gap:18px;background:white;padding:24px;border:1px solid var(--line);border-radius:8px}.lesson h3{font-size:15px;margin-bottom:7px}.lesson p{font-size:12px;margin:0;line-height:1.8}.step-index{color:#8da790;font-size:22px;font-weight:500;font-variant-numeric:tabular-nums}.lesson-arrow{color:#8da790;margin-left:auto}.prep{margin-top:35px;padding:32px;background:#e9eee3;border-radius:10px;display:grid;grid-template-columns:1fr 1.5fr;gap:30px}.prep h2{font-size:25px}.prep ul{margin:0;padding-left:20px;color:#526159;line-height:2}.notice{padding:13px 17px;background:#e5eddd;border-left:3px solid var(--green);margin:12px 0 20px;border-radius:3px;font-size:13px}.notice.error{background:#fbe9e4;border-color:var(--red);color:var(--red)}.notice.success{background:#e4f2e9}.login-card{max-width:500px;margin:55px auto;padding:38px;background:white;border:1px solid var(--line);border-radius:10px}.login-card h1{font-size:29px}label{display:block;font-size:12px;font-weight:600;margin:12px 0}input:not([type=checkbox]),textarea{display:block;width:100%;padding:11px 12px;border:1px solid #ccd5ca;border-radius:5px;background:#fff;margin-top:6px;color:var(--ink)}input[type=file]{font-size:12px;background:var(--paper)}.errorlist{color:var(--red);font-size:12px}.text-button{background:none;border:0;color:var(--muted);padding:3px 0;font-size:12px}.text-button:hover{color:var(--red)}.breadcrumb{color:var(--muted);font-size:12px}.page-title{font-size:30px;margin-bottom:9px}.pill{display:inline-block;background:#e5eddf;color:#527345;border-radius:30px;padding:4px 11px;white-space:nowrap;font-size:11px}.workspace{display:grid;grid-template-columns:270px minmax(0,1fr);gap:25px;align-items:start}.side-card{background:#e9eee3;padding:25px;border-radius:9px;position:sticky;top:20px}.side-card h2{font-size:44px;margin:0}.side-card h2 small{font-size:17px}.side-card p{font-size:10px;margin:12px 0}.progress{height:4px;background:#d1dbca;border-radius:4px;overflow:hidden}.progress span{display:block;height:100%;background:var(--green)}.step-nav{list-style:none;margin:25px 0;padding:0}.step-nav li{margin:15px 0;font-size:12px;color:#75816d}.step-nav a{display:flex;gap:10px}.step-nav span{font-size:10px;min-width:20px}.step-nav .done{color:var(--green)}.step-nav .current{font-weight:700;color:#143c29}.side-note{border-top:1px solid #cdd8c6;padding-top:15px;font-size:11px;color:var(--muted)}.step-card{background:#fff;border:1px solid var(--line);border-radius:9px;padding:26px;margin-bottom:18px}.card-heading{display:flex;align-items:center;gap:15px;margin-bottom:17px}.card-heading h2{font-size:19px;margin:0}.card-heading .pill{margin-left:auto}.guide{font-size:14px}.rule{background:var(--paper);padding:10px 13px;font-size:11px;color:#63735e;border-radius:4px;margin-bottom:15px}.upload-form{display:flex;gap:12px;align-items:end;margin:15px 0}.upload-form label{flex:1;margin:0}.file-row{display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);padding:12px 0;font-size:12px;overflow-wrap:anywhere}.file-row a{color:var(--green)}.file-row small{margin-left:auto;color:var(--muted);white-space:nowrap}.ai-box{display:flex;align-items:center;gap:20px;background:var(--paper);padding:20px;border-radius:6px;margin:20px 0}.ai-box>div{flex:1}.ai-box h3{margin:0}.ai-box p{margin:4px 0;font-size:12px}.ai-box input{max-width:120px}.checkbox{display:flex;align-items:flex-start;gap:10px;font-weight:400;line-height:1.9}.checkbox input{margin-top:5px}.grade-row{display:grid;grid-template-columns:1fr 1.6fr;gap:15px;border-bottom:1px solid var(--line);padding-bottom:10px}.feedback{background:#eaf2e6;padding:13px 15px;display:flex;gap:18px;margin-top:16px;font-size:12px}.score{font-size:40px;color:var(--green);padding-left:20px}.sync-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:20px}.sync-grid>div{background:var(--paper);padding:15px;font-size:12px}.sync-grid b{display:block;font-size:17px;margin-top:8px}.audit{font-size:11px;border-top:1px solid var(--line);padding-top:10px;margin-bottom:10px}.table-wrap{overflow:auto;background:white;border:1px solid var(--line);border-radius:8px}table{border-collapse:collapse;width:100%;font-size:12px;text-align:left}th{background:#e9eee3;font-weight:500;padding:15px}td{padding:17px 15px;border-top:1px solid var(--line)}td small{display:block;color:var(--muted);font-size:10px;white-space:nowrap}td a{color:var(--green);white-space:nowrap}.empty{text-align:center;padding:40px}.config-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}dt{color:var(--muted);font-size:11px;margin-top:14px}dd{margin:3px 0;overflow-wrap:anywhere}.instructions{padding-left:20px}.instructions li{padding-bottom:13px}.instructions a{color:var(--green);text-decoration:underline}.run-list{margin-bottom:35px}.run-row{background:white;border:1px solid var(--line);padding:20px;display:flex;align-items:center;gap:20px;margin-bottom:10px;border-radius:6px}.run-row>div{flex:1}.run-row small{display:block;font-size:10px;color:var(--muted)}footer{max-width:1236px;margin:0 auto;padding:25px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:var(--muted);font-size:11px}
@media(max-width:1000px){.topbar{flex-wrap:wrap}.topbar nav{order:3;width:100%;justify-content:center}.hero h1{font-size:36px}.hero-art{height:330px}.hero{gap:20px}.workspace{grid-template-columns:220px minmax(0,1fr)}.side-card{padding:18px}.platform-a{left:80px}.platform-b{left:50px}.platform-c{left:220px}.orb-one{left:160px}}@media(max-width:700px){main{padding:20px 18px 40px}.brand small{display:none}.topbar{padding:15px 18px;gap:12px}.topbar nav{gap:15px;font-size:11px}.hero{grid-template-columns:1fr;padding-top:15px}.hero h1{font-size:37px}.hero-art{height:260px}.platform-a{left:120px;top:95px}.platform-b{left:80px;top:55px}.platform-c{left:265px;top:140px}.orb-one{left:185px;top:48px}.art-label{font-size:16px}.stat-strip{grid-template-columns:1fr 1fr;gap:20px;margin:20px 0 35px}.stat-strip>div{padding:0!important;border:0}.stat-strip b{font-size:16px}.curriculum,.prep,.config-grid{grid-template-columns:1fr}.section-head{align-items:flex-start;flex-direction:column}.workspace{grid-template-columns:1fr}.side-card{position:static}.step-nav{display:none}.step-card{padding:18px}.card-heading{flex-wrap:wrap}.card-heading h2{font-size:17px}.upload-form,.ai-box{align-items:stretch;flex-direction:column}.grade-row{grid-template-columns:1fr}.grade-row label{margin:6px 0}.run-row{flex-wrap:wrap}.page-title{font-size:25px}.sync-grid{grid-template-columns:1fr}footer{margin:0 18px;gap:20px;font-size:10px}.hero-actions{gap:10px}.login-card{padding:24px;margin:20px 0}h1{font-size:30px}}