:root{font-family:'Microsoft YaHei',sans-serif;color:#142c40;background:#c3dcef;font-size:16px}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button{cursor:pointer;border:1px solid #9bbae0;color:#163851;padding:6px 14px;background:linear-gradient(#fff,#c4dcf3);border-radius:2px}button:hover{filter:brightness(.96)}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible{outline:3px solid #f8a600;outline-offset:2px}input,textarea,select{border:1px solid #8fabc0;padding:8px;background:#fff;border-radius:2px}textarea{resize:vertical;line-height:1.8}.orange{background:linear-gradient(#ffd986,#ffb900);border-color:#ec9b0a;color:#332407}.primary{background:linear-gradient(#99d4f3,#208fc7);color:#062c49}.danger{color:#a22319}.muted{color:#526b7b;font-size:14px}h1{font-size:24px}h2{font-size:20px}h3{font-size:18px}a{color:#095aa2}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#183e59;color:white;padding:12px 20px;z-index:50;display:none;max-width:90vw}.login-page{min-height:100vh;display:grid;place-content:center;background:linear-gradient(#bfd9ed,#eaf5fa 50%,#bfd9ed)}.login-box{width:min(790px,94vw);border:18px solid #0b94c9;border-radius:18px;background:#e4f3fb;padding:20px 38px 35px;position:relative}.ribbon{position:absolute;top:0;left:0;background:#ffa900;color:white;padding:5px 14px;font-weight:bold}.login-box h1{text-align:center;color:#335f97;margin:10px 0 28px;padding-bottom:20px;border-bottom:1px solid #ccdeec}.login-main{display:grid;grid-template-columns:190px 1fr;gap:30px;align-items:center}.login-icon{font-size:94px;text-align:center;border-right:1px solid #bed7e7;padding:30px 0}.login-fields label{display:grid;grid-template-columns:105px 1fr;align-items:center;margin:16px 0}.login-actions{display:flex;gap:12px;justify-content:center;margin-top:24px}.login-foot{text-align:center;margin-top:24px}.error{color:#b6211c;min-height:24px}.header{height:112px;background:linear-gradient(#7bbdff,#6dafdf);color:white;display:grid;grid-template-columns:300px 1fr 290px;align-items:center;padding:12px 18px;gap:15px}.profile{display:flex;gap:12px;font-weight:bold;font-size:16px;line-height:1.6}.avatar{background:#eff7ff;color:#357cb1;display:grid;place-items:center;width:65px;height:82px;font-size:45px;border:3px solid white}.header-title{text-align:center;font-size:19px;font-weight:bold}.header-title small{display:block;margin-top:20px;font-size:17px}.clock{color:#ffff00;font-weight:bold;white-space:nowrap;margin-right:12px}.exam{height:calc(100vh - 112px);display:grid;grid-template-columns:255px 1fr;background:#dfedf8}.sidebar{border-right:4px solid #a7c8ec;overflow:auto}.group-title{background:linear-gradient(#85c7ed,#318cc1);font-weight:bold;padding:7px 10px;color:#071d2d;display:flex;justify-content:space-between}.group-title button{background:none;border:none;font-size:14px;padding:0}.question-links{display:flex;flex-wrap:wrap;gap:1px;padding-bottom:6px}.question-links button{padding:7px 11px;background:#e1edf7;border-color:#fff;text-decoration:underline;color:#1348b0}.question-links button.active{background:#ffc000;text-decoration:none;color:#172736}.question-links button.answered{color:#08793b}.unanswered{color:red}.sidebar .instructions{color:#d6221e;padding:8px;line-height:1.75;font-size:15px}.workspace{min-width:0;display:flex;flex-direction:column;padding:10px 10px 0;overflow:hidden}.paper-toolbar{display:flex;gap:4px;align-items:center;border-bottom:2px solid #2688bd;padding-bottom:2px}.tab-label{background:linear-gradient(#91c9ed,#2d8dc0);font-weight:bold;text-align:center;min-width:120px;padding:7px}.paper-title{padding:5px 0;font-size:15px;color:#465563;display:flex;justify-content:space-between;align-items:center}.material{background:#fff;padding:20px 10px;line-height:1.85;overflow:auto;white-space:pre-wrap;font-family:SimSun,serif;font-size:18px;flex:1;min-height:100px;border-bottom:6px solid #a6b6ff}.answer-section{display:flex;flex-direction:column;flex:1;min-height:250px;overflow:auto}.answer-tabs{display:flex;gap:3px;align-items:center;flex-wrap:wrap;border-bottom:1px solid #adc4e9;padding:4px 0}.answer-tabs button{font-size:14px;padding:6px}.answer-tabs button.active{background:#ffbf00;border-color:#ffbf00;color:black;font-weight:bold}.answer-tools{margin-left:auto;display:flex;gap:3px}.prompt{white-space:pre-wrap;font-family:SimSun,serif;line-height:1.7;padding:6px 12px;font-size:18px}.count-line{padding:0 12px 6px;display:flex;gap:15px;align-items:center;font-size:15px}.word-count{color:#db2521}.save-status{color:#42714c;margin-left:auto;font-size:14px}.answer-box{margin:0 12px;flex:1;min-height:130px;font:18px/1.85 SimSun,serif;padding:12px;resize:none;border:1px solid #969fa8;overflow:auto}.exam-footer{display:flex;justify-content:center;gap:20px;align-items:center;min-height:48px}.exam-footer label{display:flex;gap:8px;align-items:center}.exam-footer input{width:20px;height:20px}.workspace.expand-material .answer-section{display:none}.workspace.expand-answer .material,.workspace.expand-answer .paper-title{display:none}.contrast .exam{background:#f3f3ea}.contrast .header{background:#526f8c}.teacher-shell{min-height:100vh;background:#edf4f9}.teacher-header{background:#579fce;color:white;padding:20px 30px;display:flex;align-items:center;gap:20px}.teacher-header h1{margin:0;flex:1}.teacher-nav{padding:12px 30px;display:flex;gap:10px;border-bottom:1px solid #bfd5e5;background:#d8eafa}.teacher-nav button.active{background:#0d83be;color:white}.teacher-content{max-width:1200px;margin:auto;padding:24px}.card{background:white;border:1px solid #bdcfde;padding:20px;margin:0 0 18px;border-radius:4px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.row.between{justify-content:space-between}.stats{display:flex;gap:14px;margin-bottom:20px}.stat{flex:1;background:white;border:1px solid #c4d9e7;padding:18px}.stat b{display:block;font-size:28px;color:#2379b0;margin-top:5px}table{border-collapse:collapse;width:100%;background:white}td,th{text-align:left;border-bottom:1px solid #d9e5ee;padding:12px}th{background:#e1eef7}form .field{display:flex;flex-direction:column;gap:7px;margin:12px 0}.wide{width:100%}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.question-editor textarea{width:100%;min-height:180px}.question-editor .prompt-editor{min-height:72px}.tag{font-size:14px;background:#e1eef8;padding:3px 8px}.answer-review{white-space:pre-wrap;line-height:1.9;background:#f7fafc;border:1px solid #d5e4ef;padding:18px}.empty{padding:30px;text-align:center;color:#587083}.end-page{max-width:900px;margin:50px auto;padding:28px;background:#fff;border:1px solid #a9c8df}.end-page h1{color:#287cae}.end-page details{margin:18px 0}.end-page summary{cursor:pointer;font-weight:bold}.overlay{position:fixed;inset:0;background:#17365388;display:grid;place-items:center;z-index:20}.dialog{background:#edf6fc;border:4px solid #4d9fcc;width:min(530px,95vw);padding:24px}.dialog h2{margin-top:0}.dialog .row{justify-content:flex-end;margin-top:20px}.text-mark{background:#fff195}body.busy button{pointer-events:none}@media(max-width:900px){.header{height:auto;min-height:112px;grid-template-columns:210px 1fr}.header-title{font-size:16px}.header-actions{grid-column:1/-1;justify-self:end}.exam{height:calc(100vh - 156px);grid-template-columns:170px 1fr}.sidebar .instructions{font-size:14px}.exam-footer{gap:6px}.exam-footer button{padding:5px 8px}.answer-tools{margin-left:0}.login-main{grid-template-columns:1fr}.login-icon{display:none}.form-grid{grid-template-columns:1fr}.teacher-content{padding:12px}table{font-size:14px}}@media(max-width:600px){.header{grid-template-columns:1fr}.header-title{display:none}.exam{height:auto;min-height:calc(100vh - 155px);grid-template-columns:1fr}.sidebar{border-right:none}.sidebar .instructions{display:none}.question-links{padding:0}.group-title{padding:3px 10px}.workspace{min-height:760px}.material{max-height:350px}.answer-box{min-height:230px}.login-box{padding:12px;border-width:10px}.login-box h1{font-size:20px}.login-fields label{grid-template-columns:95px 1fr}.login-fields input{width:100%}.teacher-header{padding:14px;flex-wrap:wrap}.teacher-nav{padding:10px}.stats{gap:6px}.stat{padding:10px}.row input{max-width:100%}}
:root .answer-section{flex:1.35;min-height:330px}
:root .prompt{max-height:110px;overflow:auto;flex-shrink:0}
:root .answer-box{min-height:130px}


.daily-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}.daily-cards .card{margin:0}.field small{font-size:13px;color:#596979}#answer-date,#editor-date{max-width:100%;min-width:280px}.dialog{max-height:90vh;overflow:auto}

.daily-table{min-width:800px}.daily-table th{white-space:nowrap}.daily-table td:first-child,.daily-table td:nth-child(3){white-space:nowrap}.daily-actions{display:flex;flex-wrap:wrap;gap:8px;min-width:250px}.daily-actions a{white-space:nowrap;align-self:center}

@media(max-width:900px){.daily-table{min-width:0}.daily-table thead{display:none}.daily-table,.daily-table tbody,.daily-table tr,.daily-table td{display:block;width:100%;box-sizing:border-box}.daily-table tr{padding:14px;margin-bottom:14px;background:white;border:1px solid #d2e1eb}.daily-table td{padding:5px 0;border:0}.daily-table td:first-child{font-size:19px;font-weight:bold}.daily-table td:nth-child(2){font-size:16px}.daily-table td:nth-child(3)::before{content:'发布状态：'}.daily-table td:nth-child(4)::before{content:'已开始：'}.daily-table td:nth-child(5)::before{content:'已交卷：'}.daily-table .daily-actions{min-width:0;margin-top:6px}}
.submission-success{border:2px solid #20915b;background:#f0fff6}.submission-success h1{color:#147545;font-size:32px}