:root{
  --bg:#f5f6f8; --panel:#ffffff; --line:#e3e6ea; --text:#1f2329; --muted:#6b7280;
  --blue:#185FA5; --blue-bg:#E6F1FB; --green:#3B6D11; --green-bg:#EAF3DE;
  --amber:#854F0B; --amber-bg:#FAEEDA; --pink:#993556; --pink-bg:#FBEAF0;
  --purple:#534AB7; --radius:10px;
}
*{box-sizing:border-box;}
body{margin:0;font-family:-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);font-size:14px;}
header{background:linear-gradient(90deg,#185FA5,#534AB7);color:#fff;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;}
header h1{font-size:17px;margin:0;font-weight:600;}
.role-tabs{display:flex;gap:8px;align-items:center;}
.role-tabs button{background:rgba(255,255,255,.15);border:none;color:#fff;padding:7px 16px;border-radius:20px;cursor:pointer;font-size:13px;}
.role-tabs button.active{background:#fff;color:#185FA5;font-weight:600;}
.whoami{font-size:12px;opacity:.9;margin-right:6px;}
.container{display:flex;min-height:calc(100vh - 56px);}
aside{width:200px;background:var(--panel);border-right:1px solid var(--line);padding:14px 0;}
aside .nav-item{padding:11px 20px;cursor:pointer;font-size:13px;border-left:3px solid transparent;}
aside .nav-item:hover{background:var(--bg);}
aside .nav-item.active{background:var(--blue-bg);border-left-color:var(--blue);color:var(--blue);font-weight:600;}
main{flex:1;padding:22px;overflow:auto;}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:18px;}
.card h3{margin:0 0 12px;font-size:15px;}
.grid{display:grid;gap:14px;}
.cols-2{grid-template-columns:1fr 1fr;}
.cols-3{grid-template-columns:repeat(3,1fr);}
.cols-4{grid-template-columns:repeat(4,1fr);}
.btn{background:var(--blue);color:#fff;border:none;padding:8px 16px;border-radius:8px;cursor:pointer;font-size:13px;}
.btn:hover{opacity:.9;}
.btn.ghost{background:transparent;border:1px solid var(--blue);color:var(--blue);}
.btn.sm{padding:5px 12px;font-size:12px;}
.btn.danger{background:transparent;border:1px solid var(--pink);color:var(--pink);}
.tag{display:inline-block;padding:2px 9px;border-radius:12px;font-size:12px;margin-right:6px;}
.tag.green{background:var(--green-bg);color:var(--green);}
.tag.amber{background:var(--amber-bg);color:var(--amber);}
.tag.pink{background:var(--pink-bg);color:var(--pink);}
.tag.blue{background:var(--blue-bg);color:var(--blue);}
.tag.gray{background:#eee;color:#555;}
table{width:100%;border-collapse:collapse;font-size:13px;}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:middle;}
th{background:var(--bg);font-weight:600;white-space:nowrap;}
input,textarea,select{width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:8px;font-size:13px;font-family:inherit;background:#fff;color:var(--text);}
input[type=radio],input[type=checkbox]{width:auto;padding:0;margin-right:5px;vertical-align:-1px;}
textarea{min-height:110px;resize:vertical;}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap;}
.score-big{font-size:34px;font-weight:700;color:var(--blue);}
.muted{color:var(--muted);}
.hidden{display:none !important;}
.chart{width:100%;height:340px;}
.dim-row{display:flex;justify-content:space-between;align-items:center;padding:6px 0;gap:10px;}
.bar{height:8px;border-radius:4px;background:var(--blue-bg);}
.bar > i{display:block;height:100%;border-radius:4px;background:var(--blue);}
.pill{padding:1px 8px;border-radius:10px;font-size:12px;background:#eee;margin-left:6px;}
.up{color:var(--green);font-weight:600;} .down{color:var(--pink);font-weight:600;} .flat{color:var(--muted);}
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.35);display:none;align-items:center;justify-content:center;z-index:50;}
.modal{background:#fff;border-radius:12px;padding:22px;width:620px;max-width:94vw;max-height:88vh;overflow:auto;}
.modal.wide{width:900px;}
.modal h3{margin-top:0;}
.close{float:right;cursor:pointer;color:var(--muted);font-size:16px;}
.form-row{display:flex;flex-direction:column;gap:6px;margin-bottom:14px;}
.form-row label{font-size:13px;color:var(--text);font-weight:600;}
.form-row input,.form-row select{padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:14px;width:100%;box-sizing:border-box;}
.modal textarea{width:100%;box-sizing:border-box;border:1px solid var(--line);border-radius:8px;padding:10px;font-size:13px;font-family:inherit;resize:vertical;}
.import-tip{background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-size:12px;color:#555;line-height:1.7;margin-bottom:12px;}
.import-tip b{color:var(--text);}
.evi{background:var(--bg);border-left:3px solid var(--blue);padding:7px 10px;font-size:12px;color:#444;margin:6px 0;border-radius:0 6px 6px 0;line-height:1.6;}
.suggest{color:var(--amber);font-size:12px;margin-bottom:10px;}
.nav-title{font-size:11px;color:var(--muted);padding:6px 20px;text-transform:uppercase;letter-spacing:1px;}
/* 版本切换标签 */
.vtabs{display:flex;gap:8px;flex-wrap:wrap;}
.vtab{border:1px solid var(--line);background:#fff;border-radius:20px;padding:6px 14px;cursor:pointer;font-size:13px;display:flex;align-items:center;}
.vtab:hover{border-color:var(--blue);}
.vtab.active{background:var(--blue);color:#fff;border-color:var(--blue);font-weight:600;}
.vtab.active .pill{background:rgba(255,255,255,.25);color:#fff;}
/* 页签 */
.tabs{display:flex;gap:0;border-bottom:2px solid var(--line);margin-bottom:16px;}
.tab{padding:9px 20px;cursor:pointer;font-size:14px;border-bottom:2px solid transparent;margin-bottom:-2px;color:var(--muted);}
.tab.active{color:var(--blue);border-bottom-color:var(--blue);font-weight:600;}
.tab .cnt{background:var(--pink-bg);color:var(--pink);border-radius:10px;padding:0 7px;font-size:11px;margin-left:6px;}
.tab.active .cnt{background:var(--blue-bg);color:var(--blue);}
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:14px;padding:11px 13px;background:var(--bg);border:1px solid var(--line);border-radius:10px;}
.filter-bar .f-input{padding:7px 11px;border:1px solid var(--line);border-radius:8px;font-size:13px;background:#fff;color:var(--text);width:auto;min-width:130px;}
.filter-bar .f-input:focus{outline:none;border-color:var(--blue);}
.chip{padding:6px 15px;border:1px solid var(--line);border-radius:20px;font-size:13px;cursor:pointer;color:var(--muted);background:#fff;user-select:none;white-space:nowrap;}
.chip.on{background:var(--blue);color:#fff;border-color:var(--blue);font-weight:600;}
.filter-bar .btn.ghost.sm{margin-left:auto;}
.stu-cell{line-height:1.5;}
.stu-cell b{display:block;}
.stu-cell span{font-size:12px;color:var(--muted);}
.prompt-box{background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-size:13px;line-height:1.75;white-space:pre-wrap;max-height:220px;overflow:auto;}
.review-card{border-left:4px solid var(--green);background:var(--green-bg);padding:12px 14px;border-radius:0 8px 8px 0;margin-bottom:10px;}
.review-card.iterate{border-left-color:var(--amber);background:var(--amber-bg);}
.kv{margin:6px 0;font-size:13px;line-height:1.7;}
.kv b{color:#333;}
.chk-wrap{display:flex;flex-wrap:wrap;gap:8px 16px;padding:10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);max-height:150px;overflow:auto;}
.chk-wrap label{font-size:13px;cursor:pointer;white-space:nowrap;}
.grp-title{width:100%;font-size:12px;color:var(--muted);margin-top:4px;}

/* ============ 教师知识库 ============ */
.kb-toolbar{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:16px;}
.kb-toolbar h3{font-size:20px;margin:0 0 5px;}
.kb-toolbar p{margin:0;}
.kb-search{width:min(420px,100%) !important;}
.kb-prompt-preview{max-width:760px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.6;}
.kb-actions{white-space:nowrap;}
.table-scroll{width:100%;overflow:auto;}
.kb-detail-modal,.kb-editor-modal{width:min(1500px,96vw);max-height:92vh;}
.kb-full-prompt{max-height:320px;}
.kb-detail-table{min-width:1280px;}
.kb-detail-table th:nth-child(4),.kb-detail-table td:nth-child(4){min-width:220px;}
.kb-detail-table th:nth-child(5),.kb-detail-table td:nth-child(5){min-width:210px;}
.kb-detail-table th:nth-child(6),.kb-detail-table td:nth-child(6){min-width:300px;}
.kb-basic-grid{display:grid;grid-template-columns:220px minmax(280px,1fr);gap:14px;}
.kb-editor-table{min-width:1360px;table-layout:fixed;}
.kb-editor-table th:nth-child(1){width:155px;}.kb-editor-table th:nth-child(2){width:55px;}
.kb-editor-table th:nth-child(3){width:280px;}.kb-editor-table th:nth-child(4){width:250px;}
.kb-editor-table th:nth-child(5){width:360px;}.kb-editor-table th:nth-child(6){width:75px;}.kb-editor-table th:nth-child(7){width:65px;}
.kb-editor-table textarea{min-height:64px;resize:vertical;}
.kb-editor-actions{justify-content:flex-end;position:sticky;bottom:-22px;background:#fff;padding:14px 0 2px;margin-top:10px;border-top:1px solid var(--line);}

/* ============ 登录 ============ */
.login-bg{position:fixed;inset:0;background:linear-gradient(135deg,#185FA5,#534AB7);display:flex;align-items:center;justify-content:center;z-index:100;}
.login-card{background:#fff;border-radius:16px;padding:30px 34px;width:380px;max-width:92vw;box-shadow:0 18px 50px rgba(0,0,0,.25);}
.login-card h2{margin:0 0 4px;font-size:19px;color:var(--text);}
.login-card .sub{color:var(--muted);font-size:12px;margin-bottom:16px;}
.login-roles{display:flex;gap:8px;margin-bottom:14px;}
.login-roles .lr{flex:1;text-align:center;padding:9px 0;border:1px solid var(--line);border-radius:10px;cursor:pointer;font-size:13px;background:var(--bg);}
.login-roles .lr.on{background:var(--blue);color:#fff;border-color:var(--blue);font-weight:600;}
.login-card label{display:block;font-size:12px;color:var(--muted);margin:10px 0 4px;}
.login-hint{font-size:11px;color:var(--muted);margin-top:14px;line-height:1.7;border-top:1px dashed var(--line);padding-top:10px;}
.login-err{color:var(--pink);font-size:12px;min-height:16px;margin-top:8px;}

/* ============ 门户 landing ============ */
.portal{max-width:880px;margin:60px auto;padding:0 20px;}
.portal h1{font-size:26px;text-align:center;background:linear-gradient(90deg,#185FA5,#534AB7);-webkit-background-clip:text;background-clip:text;color:transparent;}
.portal .lead{text-align:center;color:var(--muted);margin-bottom:30px;}
.portal-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.pcard{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px;text-align:center;cursor:pointer;transition:.15s;}
.pcard:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(24,95,165,.12);border-color:var(--blue);}
.pcard .ico{font-size:34px;}
.pcard h3{margin:12px 0 6px;}
.pcard p{color:var(--muted);font-size:13px;margin:0;}
.pcard .def{font-size:11px;color:var(--muted);margin-top:12px;border-top:1px dashed var(--line);padding-top:10px;text-align:left;line-height:1.7;}

/* 正式登录页 login.html */
.login-page{display:flex;min-height:100vh;}
.lp-brand{width:46%;background:linear-gradient(135deg,#185FA5,#534AB7);color:#fff;padding:54px 50px;display:flex;flex-direction:column;justify-content:center;}
.lp-brand .badge{font-size:13px;letter-spacing:2px;opacity:.85;}
.lp-brand h1{font-size:34px;line-height:1.3;margin:18px 0 14px;font-weight:700;}
.lp-brand p.lead{font-size:15px;line-height:1.9;opacity:.9;max-width:430px;}
.lp-feats{margin-top:34px;display:flex;flex-direction:column;gap:16px;}
.lp-feats .f{display:flex;gap:12px;align-items:flex-start;}
.lp-feats .f .ic{width:34px;height:34px;border-radius:9px;background:rgba(255,255,255,.16);display:flex;align-items:center;justify-content:center;font-size:17px;flex:none;}
.lp-feats .f .t{font-size:14px;font-weight:600;}
.lp-feats .f .d{font-size:12.5px;opacity:.82;margin-top:2px;}
.lp-foot{margin-top:auto;font-size:12px;opacity:.7;padding-top:24px;}
.lp-form{width:54%;background:#fff;display:flex;align-items:center;justify-content:center;padding:40px;}
.lp-card{width:360px;max-width:90%;}
.lp-card h2{margin:0 0 6px;font-size:22px;}
.lp-card .sub{color:var(--muted);font-size:13px;margin-bottom:22px;}
.lp-roles{display:flex;gap:10px;margin-bottom:20px;}
.lp-roles .r{flex:1;text-align:center;padding:12px 0;border:1px solid var(--line);border-radius:12px;cursor:pointer;background:var(--bg);transition:.12s;}
.lp-roles .r .em{font-size:20px;}
.lp-roles .r .nm{font-size:13px;margin-top:4px;}
.lp-roles .r.on{background:var(--blue-bg);border-color:var(--blue);color:var(--blue);font-weight:600;}
.lp-field{margin-bottom:14px;}
.lp-field label{display:block;font-size:12px;color:var(--muted);margin-bottom:5px;}
.lp-field input{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;font-size:14px;outline:none;}
.lp-field input:focus{border-color:var(--blue);}
.lp-btn{width:100%;background:var(--blue);color:#fff;border:none;padding:12px;border-radius:10px;font-size:15px;cursor:pointer;margin-top:6px;}
.lp-btn:hover{opacity:.92;}
.lp-err{color:var(--pink);font-size:12.5px;min-height:18px;margin-top:10px;}
.lp-hint{margin-top:18px;font-size:12px;color:var(--muted);line-height:1.8;border-top:1px dashed var(--line);padding-top:12px;}
.lp-hint b{color:var(--text);}
@media(max-width:760px){.login-page{flex-direction:column;}.lp-brand,.lp-form{width:100%;}.lp-brand{padding:36px 26px;}}