@charset "UTF-8";
:root{--ink:#29463b;--muted:#718076;--green:#376a50;--soft:#e9f1e8;--cream:#f6f5ed;--paper:#fffef8;--line:#dce5d8;--orange:#b97042;--gold:#f2dfaf;--shadow:0 12px 42px #29463b0b;font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:var(--ink);background:var(--cream);font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:inherit}button,input,textarea,select{font:inherit}button,a,input,textarea{touch-action:manipulation}button{border:1px solid var(--line);border-radius:11px;background:#fffef8;color:var(--ink);padding:11px 17px;cursor:pointer;font-weight:600}button:hover:not(:disabled),a.entry:hover{filter:brightness(.97)}button:disabled{opacity:.45;cursor:not-allowed}.primary{background:var(--green);border-color:var(--green);color:#fff}.quiet{background:transparent}.danger{color:#9d3f37;border-color:#e4c0bb}input,textarea,select{border:1px solid 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@media(max-width:1050px){.teacher-layout{grid-template-columns:220px minmax(0,1fr);gap:16px}.stats{gap:8px}.stat{padding:14px 12px}.stat strong{font-size:27px}.hero{gap:25px}.entry{padding:20px;gap:14px}.entry-symbol{display:none}.writing-layout{grid-template-columns:1fr 220px}.science-layout{grid-template-columns:210px 1fr}.panel{padding:20px}.shell{padding-left:3%;padding-right:3%}}
@media(max-width:740px){.hero{grid-template-columns:1fr;padding:18px 0 25px;gap:20px}.hero-art{min-height:235px}.hero-copy h1 br{display:none}.art-card p{font-size:20px}.landing{padding:10px 20px}.entry-grid,.setup-grid{grid-template-columns:1fr}.site-header{padding:17px 5%}.site-header .pill{font-size:10px}.teacher-layout{display:block}.room-sidebar{position:static;margin-bottom:20px}.room-sidebar .qr{width:140px;height:140px;margin:12px 0}.room-sidebar .sidebar-actions{grid-template-columns:1fr 1fr}.stats{grid-template-columns:repeat(2,1fr)}.writing-layout,.science-layout{grid-template-columns:1fr}.writing-tip{order:-1}.writing-tip ol{margin:0}.science-about{padding:15px}.science-about p{margin-bottom:8px}.science-about h3{margin:0 0 5px}.level-tabs{gap:6px}.level-tab{padding:12px 8px;gap:6px}.level-tab .num{font-size:18px}.level-tab b{font-size:12px}.level-tab small{font-size:10px}.student-heading h1{font-size:20px}.task-header h2{font-size:21px}.task-header{align-items:flex-start}.panel{padding:16px}.task-foot{flex-wrap:wrap}.task-foot .primary{width:100%}.stage-badge{font-size:10px}.page-title h1{font-size:24px}.page-title{flex-wrap:wrap}.student-join{margin:20px auto}.chat-log{height:270px}.route-frame{min-height:300px}.hero .lead{font-size:14px}.journey{gap:9px;font-size:12px}.record-box{padding:22px 15px}}