:root{--ink:#162e3a;--muted:#637780;--green:#499b28;--forest:#183f37;--line:#dde7e2;--mist:#f1f5f2;font-family:Arial,"Microsoft YaHei",sans-serif;color:var(--ink);background:var(--mist)}*{box-sizing:border-box}body{margin:0;min-width:320px}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{outline-offset:4px}button{cursor:pointer}button:disabled{cursor:wait;opacity:.65}img{max-width:100%}button,.button{border:0;border-radius:5px;padding:12px 20px;background:var(--green);color:white;font-weight:700;display:inline-flex;justify-content:center;align-items:center;gap:9px}.plain,.secondary{background:white;color:var(--forest);border:1px solid var(--line)}.small{padding:8px 12px;font-size:13px}.skip{position:absolute;left:16px;top:-80px}.skip:focus{top:12px;z-index:20;background:white;padding:12px}.topbar{height:82px;background:#fff;display:flex;align-items:center;padding:0 36px;gap:26px;border-bottom:1px solid var(--line)}.logo{width:162px;display:flex;align-items:center}.logo img{width:100%;max-height:51px;object-fit:contain}.topbar>span{font-size:15px;border-left:1px solid var(--line);padding-left:24px;color:var(--muted)}.top-actions{margin-left:auto;display:flex;gap:18px;align-items:center;font-size:13px}.top-actions .plain{padding:8px 12px}.loading{padding:70px;text-align:center}.login-layout{max-width:1220px;margin:70px auto;display:grid;grid-template-columns:1.1fr 1fr;min-height:560px;background:#fff;box-shadow:0 18px 60px #123b2910}.login-intro{background:var(--forest);color:white;padding:65px 60px;position:relative;overflow:hidden}.login-intro:after{content:"";position:absolute;right:-160px;bottom:-160px;width:420px;height:420px;border:1px solid #ffffff18;border-radius:50%;box-shadow:0 0 0 65px #ffffff06,0 0 0 130px #ffffff03}.eyebrow{font-size:12px;letter-spacing:.18em;font-weight:700;color:#8bd477;margin:0 0 24px}.login-intro h1{font-size:42px;line-height:1.35;margin:0 0 24px;position:relative;z-index:1}.login-intro>p:not(.eyebrow){line-height:1.9;color:#c4d8cf;max-width:365px}.login-foot{margin-top:70px;font-size:12px;color:#adc6ba}.login-form{padding:60px;align-self:center}.login-form h2{font-size:27px;margin:0 0 12px}.muted{color:var(--muted);font-size:14px;line-height:1.7}.field{display:block;font-size:13px;font-weight:600;margin:21px 0}.field input,.field select,.field textarea{display:block;width:100%;margin-top:9px;padding:13px;border:1px solid #cbd8d1;border-radius:4px;background:#fff;color:var(--ink)}.field textarea{min-height:90px}.login-form button[type=submit]{width:100%;margin:10px 0 17px}.error{color:#b63829;font-size:14px;line-height:1.7;white-space:pre-wrap}.shell{display:grid;grid-template-columns:245px minmax(0,1fr);min-height:calc(100vh - 82px)}.sidebar{padding:28px 20px;background:#fff;border-right:1px solid var(--line)}.sidebar nav{display:flex;flex-direction:column;gap:5px}.nav-item{display:flex;gap:12px;padding:15px 17px;border-radius:4px;font-size:14px;color:#576d72}.nav-item.active{background:#e9f2e6;color:#33751c;font-weight:700}.nav-item:hover{background:#f1f5f2}.nav-icon{font-size:17px;width:19px}.account-card{margin:30px 16px 0;border-top:1px solid var(--line);padding-top:22px}.account-card strong{display:block;margin-bottom:6px}.account-card p{font-size:12px;color:var(--muted);margin:6px 0}.workspace{padding:34px 42px 60px;min-width:0;max-width:1650px;width:100%}.searchbar{display:flex;align-items:center;gap:10px;background:white;padding:7px 8px 7px 19px;border:1px solid var(--line);border-radius:6px;margin-bottom:29px}.searchbar input{border:0;background:none;padding:8px 0;flex:1;min-width:0;font-size:14px}.page-heading{display:flex;gap:24px;justify-content:space-between;align-items:center;margin-bottom:25px}.page-heading h1{font-size:29px;margin:0 0 8px}.page-heading p{margin:0}.welcome{background:var(--forest);padding:35px 38px;color:white;display:flex;justify-content:space-between;gap:28px;border-radius:6px;margin-bottom:25px}.welcome h1{font-size:30px;margin:0 0 13px}.welcome p{line-height:1.75;margin:0;max-width:650px;color:#c5d7ce}.welcome .eyebrow{margin-bottom:16px;color:#9bd786}.welcome .welcome-number{font-size:63px;color:#9bd786;line-height:1.2}.welcome small{display:block;color:#c5d7ce;font-size:12px;white-space:nowrap}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:30px}.stat{background:#fff;border:1px solid var(--line);padding:20px 24px;border-radius:5px}.stat strong{font-size:29px;display:block;margin-bottom:6px}.stat span{color:var(--muted);font-size:13px}.section-head{display:flex;justify-content:space-between;align-items:center;margin:28px 0 17px}.section-head h2{font-size:20px;margin:0}.section-head a{font-size:13px;color:#36752a}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.card{background:white;border:1px solid var(--line);padding:24px;border-radius:5px;min-width:0;transition:border .15s,transform .15s}.card:hover{border-color:#93b78e;transform:translateY(-2px)}.card h3{font-size:18px;line-height:1.55;margin:15px 0 10px;overflow-wrap:anywhere}.card p{font-size:13px;color:var(--muted);line-height:1.7}.card .meta{font-size:12px;color:var(--muted);margin-top:18px;display:flex;gap:10px;flex-wrap:wrap}.tag{display:inline-block;background:#edf4e9;color:#408029;font-size:11px;font-weight:700;padding:5px 8px;border-radius:3px}.tag.gray{background:#eef2f1;color:#6a7b7f}.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}.filters select{padding:11px 12px;background:white;border:1px solid var(--line);border-radius:4px;max-width:100%;min-width:160px}.module-layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:20px}.module-list{background:#fff;border:1px solid var(--line);padding:10px;border-radius:5px;align-self:start}.module-list a{display:block;padding:12px;font-size:12px;line-height:1.6;border-radius:3px}.module-list a.selected{background:#e9f2e6;color:#33751c;font-weight:700}.module-list small{display:block;color:#81918b}.lesson-list{display:flex;flex-direction:column;gap:9px}.lesson{display:flex;align-items:center;gap:18px;background:white;border:1px solid var(--line);border-radius:4px;padding:17px 20px}.lesson:hover{border-color:#95b78f}.lesson-number{font-size:20px;font-weight:700;color:#9cafaa;min-width:38px}.lesson-title{flex:1;min-width:0}.lesson-title strong{font-size:14px;line-height:1.6;display:block}.lesson-title small{color:var(--muted);font-size:12px;display:block;margin-top:5px}.lesson-end{color:#3c8026;font-size:12px;white-space:nowrap}.empty{padding:45px 28px;background:white;border:1px dashed #cbd8d1;text-align:center;color:var(--muted);line-height:1.8;border-radius:5px}.empty h3{color:var(--ink)}.resource-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:22px}.viewer{background:#142c33;border-radius:5px;overflow:hidden}.viewer video{width:100%;display:block;aspect-ratio:16/9;background:#0c1b20;object-fit:contain}.viewer iframe{width:100%;height:75vh;min-height:400px;border:0;background:#fff;display:block}.resource-info{padding:22px;background:#fff;border:1px solid var(--line);border-top:0}.resource-info h1{font-size:24px;line-height:1.5;margin:10px 0}.resource-info .actions{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}.resource-aside{background:white;border:1px solid var(--line);border-radius:5px;padding:20px;align-self:start;max-height:75vh;overflow:auto}.resource-aside h3{font-size:15px;margin-top:0}.resource-aside a{display:block;padding:11px 0;border-bottom:1px solid var(--line);font-size:12px;line-height:1.7}.resource-aside a.current{color:#388023;font-weight:bold}.tabs{display:flex;gap:8px;margin-bottom:25px;flex-wrap:wrap}.tabs a{padding:11px 18px;background:#fff;border:1px solid var(--line);border-radius:4px;font-size:13px}.tabs a.active{background:var(--forest);color:#fff;border-color:var(--forest)}.panel{padding:27px;background:white;border:1px solid var(--line);border-radius:5px;margin-bottom:20px}.panel h2{font-size:20px;margin:0 0 14px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 22px}.checks{display:flex;flex-wrap:wrap;gap:10px;margin:15px 0 24px}.checks label{font-size:12px;background:#f1f5f2;padding:9px;border-radius:4px}.check{font-size:13px;margin:17px 0;display:block}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:4px;background:white}table{border-collapse:collapse;width:100%;font-size:12px}th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;line-height:1.7;white-space:nowrap}th{background:#edf3ef;color:#52685f}td.wrap{white-space:normal;min-width:200px}table button{font-size:11px;padding:7px 10px;margin:2px}.upload-row{display:flex;align-items:center;gap:13px;flex-wrap:wrap}.upload-row input{max-width:100%}.progress-line{height:4px;background:#e6ede5;border-radius:3px;overflow:hidden;margin-top:10px}.progress-line progress{width:100%;height:4px;display:block}.notice{background:#eef4e8;border-left:3px solid var(--green);padding:15px 18px;font-size:13px;line-height:1.8;margin:18px 0;color:#47623d}.hint{font-size:12px;color:var(--muted);line-height:1.8}#toast{position:fixed;bottom:24px;right:24px;background:var(--forest);color:white;max-width:calc(100vw - 48px);padding:15px 22px;border-radius:5px;box-shadow:0 8px 30px #0002;z-index:40;white-space:pre-wrap}.error-page{text-align:center;padding:70px 20px}.bulk-status{white-space:pre-wrap;font-size:13px;line-height:1.8;color:var(--muted)}[hidden]{display:none!important}
@media(max-width:1150px){.workspace{padding:28px}.shell{grid-template-columns:205px minmax(0,1fr)}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.resource-layout{grid-template-columns:minmax(0,1fr)}.resource-aside{max-height:330px}.topbar{gap:18px}.login-layout{margin:45px 28px}.login-intro,.login-form{padding:42px}.module-layout{grid-template-columns:200px minmax(0,1fr)}}
@media(max-width:760px){.topbar{padding:0 18px;height:70px;gap:12px}.logo{width:115px}.topbar>span{display:none}.top-actions{gap:9px;font-size:12px}.top-actions .plain{padding:7px}.login-layout{display:block;margin:24px 18px;min-height:0}.login-intro{padding:30px}.login-intro h1{font-size:29px}.login-intro>p:not(.eyebrow){font-size:13px}.login-foot{margin-top:20px}.login-form{padding:30px}.shell{display:block}.sidebar{padding:12px 16px;border-right:0;border-bottom:1px solid var(--line)}.sidebar nav{flex-direction:row;overflow:auto;gap:5px}.nav-item{white-space:nowrap;padding:10px 12px;font-size:12px}.nav-icon{display:none}.account-card{display:none}.workspace{padding:23px 18px 45px}.welcome{padding:27px;display:block}.welcome h1{font-size:24px}.welcome p{font-size:13px}.welcome>div:last-child{display:none}.stats{gap:8px}.stat{padding:16px 12px}.stat strong{font-size:23px}.stat span{font-size:11px}.grid{grid-template-columns:1fr}.page-heading{align-items:flex-start;gap:10px}.page-heading h1{font-size:25px}.page-heading>.button{padding:10px;font-size:12px}.module-layout{display:block}.module-list{display:flex;overflow:auto;margin-bottom:18px;gap:4px}.module-list a{flex:none;max-width:145px;padding:10px;font-size:11px}.lesson{padding:14px 13px;gap:10px}.lesson-number{font-size:17px;min-width:28px}.lesson-title strong{font-size:13px}.lesson-end{font-size:11px}.form-grid{grid-template-columns:1fr}.panel{padding:21px}.viewer iframe{height:65vh}.resource-info h1{font-size:22px}.filters select{flex:1;min-width:135px}.searchbar button{padding:10px 14px}.top-actions a{white-space:nowrap}.resource-info .actions .button{font-size:13px}}