:root{color-scheme:light;--ink:#18362c;--muted:#65766d;--green:#2b654f;--deep:#173f32;--paper:#fffdf8;--line:#e0e9df;--cream:#f7f3e9;--gold:#c98451;--shadow:0 28px 80px rgba(25,61,48,.12)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;color:var(--ink);font:16px/1.65 "Microsoft YaHei","PingFang SC",system-ui,sans-serif;background:radial-gradient(circle at 12% 12%,#e7f2e8 0,transparent 35%),radial-gradient(circle at 92% 86%,#fff1df 0,transparent 38%),var(--cream)}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled{opacity:.55;cursor:wait}a{color:var(--green)}[hidden]{display:none!important}
.topbar{max-width:1250px;margin:auto;padding:26px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;color:var(--deep);text-decoration:none;font-size:20px;font-weight:800;letter-spacing:.08em}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;color:#fff;background:var(--green);font-family:Georgia,serif;font-size:24px;box-shadow:inset 0 -3px rgba(0,0,0,.12)}.topbar nav{display:flex;gap:25px}.topbar nav a{text-decoration:none;color:var(--muted);font-size:14px;font-weight:700}.topbar nav a:hover{color:var(--green)}
.layout{max-width:1250px;margin:0 auto;min-height:calc(100vh - 165px);padding:70px 32px 110px;display:grid;grid-template-columns:minmax(0,1fr) minmax(390px,510px);align-items:start;gap:clamp(45px,7vw,115px)}.intro{padding:40px 0 0}.eyebrow,.panel-kicker{display:block;color:var(--gold);font-size:13px;font-weight:900;letter-spacing:.17em}.intro h1{margin:24px 0;font:700 clamp(52px,6vw,90px)/1.13 Georgia,"Songti SC",serif;letter-spacing:-.045em}.intro h1 em{color:var(--green);font-style:normal}.intro-copy{max-width:580px;margin:0;color:#43594d;font-size:18px;line-height:1.9}.steps{display:grid;gap:0;max-width:490px;margin-top:52px;border-top:1px solid #cadbd0}.steps>div{display:grid;grid-template-columns:48px 1fr;column-gap:15px;padding:17px 0;border-bottom:1px solid #cadbd0}.steps span{grid-row:1/3;color:var(--gold);font:700 20px/1.2 Georgia,serif}.steps strong{font-size:16px}.steps small{color:var(--muted);font-size:13px}.pilot-note{max-width:540px;margin:35px 0 0;padding:15px 18px;border-left:3px solid #d9a676;background:rgba(255,255,255,.6);color:#6e6250;font-size:13px}.pilot-note strong{color:#98553c}
.panel{padding:36px;background:var(--paper);border:1px solid #edf1e8;border-radius:27px;box-shadow:var(--shadow)}.loading{min-height:250px;display:grid;place-items:center;color:var(--muted)}.panel-heading h2,.workspace-head h2{margin:8px 0 6px;font:700 33px/1.25 Georgia,"Songti SC",serif}.panel-heading p,.workspace-head p{margin:0;color:var(--muted);font-size:14px}.tabs{display:flex;gap:7px;margin:29px 0 24px;padding:5px;background:#eef3ed;border-radius:13px}.tab{flex:1;border:0;border-radius:10px;background:transparent;color:#6c7e72;padding:10px 12px;font-weight:800}.tab.active{background:white;color:var(--green);box-shadow:0 4px 16px rgba(27,67,49,.1)}.form{display:grid;gap:17px}.form label{display:grid;gap:7px;color:#324b3d;font-size:14px;font-weight:750}.form input,.form textarea{width:100%;min-width:0;padding:13px 14px;border:1px solid #d5dfd5;border-radius:11px;background:white;color:var(--ink);outline:0}.form input:focus,.form textarea:focus{border-color:#4d9174;box-shadow:0 0 0 3px rgba(63,130,96,.13)}.form input::placeholder,.form textarea::placeholder{color:#a4b0a4}.form textarea{min-height:115px;resize:vertical}.form .check{display:flex;align-items:flex-start;gap:10px;font-size:12px;font-weight:400;color:var(--muted)}.check input{width:17px;min-width:17px;height:17px;margin:2px 0 0}.primary,.secondary{border:0;border-radius:11px;padding:13px 20px;font-weight:800}.primary{width:100%;margin-top:3px;background:var(--green);color:white}.primary:hover{background:var(--deep)}.secondary{background:#e6f0e9;color:var(--deep)}.secondary:hover{background:#d9e9dd}.auth-foot{margin:23px 0 0;color:var(--muted);font-size:12px}.feedback{padding:12px 14px;margin:20px 0 0;border-radius:10px;background:#fff2dd;color:#815b32;font-size:14px}.feedback.error{background:#fff0eb;color:#a24632}.feedback.success{background:#e8f4eb;color:#1e6c44}
.workspace-head{display:flex;align-items:start;justify-content:space-between;gap:20px}.text-button{border:0;background:none;color:var(--green);font-size:13px;font-weight:800;white-space:nowrap}.text-button:hover{text-decoration:underline}.notice{display:grid;gap:4px;margin:23px 0;padding:16px 18px;border-radius:12px;background:#fff4df;color:#6e5940;font-size:13px}.notice strong{color:#66482c}.workspace-section{padding-top:26px;border-top:1px solid var(--line);margin-top:26px}.section-title{display:flex;align-items:baseline;gap:10px;margin-bottom:18px}.section-title h3{margin:0;font-size:18px}.section-index{font:700 16px Georgia,serif;color:var(--gold)}.refresh{margin-left:auto}.compact{gap:14px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:12px}.records{display:grid;gap:9px;margin-top:18px}.record{padding:12px 14px;border-radius:10px;background:#f4f6f0;font-size:13px}.record strong{display:block;font-size:14px}.record small{color:var(--muted)}.class-list{display:grid;gap:16px}.class-card{padding:20px;border:1px solid var(--line);border-radius:17px;background:#fff}.class-card h4{margin:0 0 4px;font-size:19px}.class-card .class-sub{margin:0 0 16px;color:var(--muted);font-size:12px}.class-card .hint{margin:4px 0 0;color:var(--muted);font-size:12px}.message-card{margin-top:14px;padding:13px;border-radius:10px;background:#f5f7f1;font-size:13px}.message-card p{margin:3px 0 8px;white-space:pre-wrap;overflow-wrap:anywhere}.message-card small{color:var(--muted)}.message-card button{margin-left:8px}.empty{padding:18px;border-radius:12px;background:#f4f6f0;color:var(--muted);font-size:14px}.count{display:block;margin-top:-12px;margin-bottom:10px;color:var(--muted);font-size:12px;text-align:right}
footer{max-width:1250px;margin:0 auto;padding:25px 32px 35px;border-top:1px solid #d9e2d7;display:flex;justify-content:space-between;gap:18px;color:var(--muted);font-size:12px}.document-page{background:var(--cream)}.document{max-width:790px;margin:45px auto 100px;padding:50px 55px;background:white;border-radius:22px;box-shadow:var(--shadow)}.document h1{font:700 48px Georgia,"Songti SC",serif;margin:8px 0 20px}.document h2{font-size:20px;margin:35px 0 10px}.document p{color:#43594d}
@media(max-width:900px){.layout{grid-template-columns:1fr;padding-top:20px;gap:35px}.intro{padding:12px 0 0}.steps{margin-top:30px}.panel{max-width:630px;width:100%}}@media(max-width:560px){.topbar{padding:18px}.topbar nav{gap:12px}.topbar nav a{font-size:12px}.layout{padding:18px 18px 70px}.intro h1{font-size:54px}.intro-copy{font-size:16px}.panel{padding:25px 20px;border-radius:20px}.two-col{grid-template-columns:1fr}footer{padding:22px 18px;flex-direction:column}.document{margin:15px 18px 60px;padding:28px 22px}.document h1{font-size:39px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}