:root{color-scheme:light;--ink:#162c2c;--muted:#6a7b7e;--line:#dfe7e7;--green:#156b60;--green-light:#e5f3ed;--bg:#f3f6f6;--orange:#b86024}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg);font:16px/1.6 "Microsoft YaHei","PingFang SC",system-ui,sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:wait;opacity:.5}button,input,select,textarea{outline-offset:3px}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--green)}h1,h2,h3,p{margin:0}h1{font-size:30px;line-height:1.4;letter-spacing:-.6px}h2{font-size:23px}h3{font-size:17px}small{font-size:13px;color:var(--muted)}button{border:0}.muted{color:var(--muted);font-size:14px}.eyebrow{font-size:13px;letter-spacing:2px;color:var(--green);font-weight:700;margin-bottom:7px}.primary,.secondary{padding:10px 18px;border-radius:7px;white-space:nowrap;font-size:14px;font-weight:600}.primary{background:var(--green);color:white}.primary:hover{background:#10594f}.secondary{background:white;border:1px solid var(--line);color:var(--ink)}.secondary:hover{background:#f1f6f4}.text-button,.row-action{color:var(--green);background:none;padding:8px;font-size:14px;font-weight:600}.row-action{white-space:nowrap}.brand{display:flex;gap:12px;align-items:center;font-size:19px;font-weight:700}.brand-mark{display:inline-flex;align-items:center;justify-content:center;background:var(--green);color:white;width:38px;height:38px;border-radius:11px;font-size:26px;flex-shrink:0}.brand small{display:block;font-size:12px;font-weight:400;margin-top:1px}.workspace{display:grid;grid-template-columns:230px minmax(0,1fr);min-height:100vh}.sidebar{padding:30px 20px 15px;background:white;border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.nav-label{font-size:12px;color:#81928f;margin:43px 14px 13px}.nav-button{display:block;width:100%;text-align:left;background:none;padding:12px 15px;margin-bottom:7px;border-radius:7px;font-size:15px;color:#657370}.nav-button.active{background:var(--green-light);color:var(--green);font-weight:700}.nav-button:hover{background:#edf5f1}.sidebar-note{margin-top:auto;background:#f3f7f5;border-radius:8px;padding:15px;font-size:13px}.sidebar-note b{color:var(--green)}.sidebar-note p{margin-top:6px;color:var(--muted)}.account{margin-top:22px;padding-top:17px;border-top:1px solid var(--line);display:flex;align-items:center;gap:10px;font-size:14px}.account small{display:block}.account .text-button{margin-left:auto}.avatar{background:#e1ece8;border-radius:50%;width:34px;height:34px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.main{min-width:0}.topbar{height:76px;border-bottom:1px solid var(--line);padding:0 36px;display:flex;align-items:center;justify-content:space-between;background:#fff;font-size:14px;color:var(--muted)}.topbar>div{display:flex;align-items:center;gap:17px}.role-chip{padding:4px 10px;border-radius:5px;background:#edf3f2;color:var(--green);font-size:13px}.demo-banner{padding:9px 36px;font-size:13px;background:#fff5df;color:#825c17;border-bottom:1px solid #ecdcae}#content{padding:30px 36px 50px;max-width:1700px;margin:auto}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:26px}.page-heading .muted{margin-top:8px}.actions{display:flex;gap:10px;flex-wrap:wrap}.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-bottom:27px}.stats button{background:white;border:1px solid var(--line);border-radius:10px;padding:20px 22px;text-align:left;color:var(--ink);box-shadow:0 2px 3px #172c2603}.stats button:hover{border-color:#86aca2}.stats button>span{font-size:14px;color:#59716b}.stats strong{display:block;font-size:34px;font-weight:650;line-height:1.8;letter-spacing:-1px}.stats strong small{font-size:13px;font-weight:400;margin-left:8px}.stats p{font-size:12px;color:#83918c}.orange{color:var(--orange)}.panel{background:white;border:1px solid var(--line);border-radius:10px;overflow:hidden}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding:0 23px;min-height:62px}.tabs{display:flex;gap:22px}.tab{padding:20px 0 16px;background:none;color:var(--muted);border-bottom:3px solid transparent;font-size:14px}.tab.active{border-bottom-color:var(--green);color:var(--green);font-weight:700}.searchbar{display:flex;gap:12px;align-items:center;padding:18px 23px}.search-label{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:6px;padding-left:12px;width:370px;max-width:100%;margin:0}.search-label input{border:0;padding:8px;width:100%;font-size:14px}.search-label span{color:#788f87;font-size:24px}.searchbar select{width:auto;max-width:210px}.searchbar .text-button{margin-left:auto}.batch{font-size:13px;padding:0 23px 12px;display:flex;align-items:center;gap:20px;color:var(--muted)}.batch label{display:flex;align-items:center;gap:6px;margin:0;font-size:13px}.batch input,td input{width:16px;height:16px;accent-color:var(--green)}.table-scroll{overflow-x:auto}table{border-collapse:collapse;width:100%;text-align:left;white-space:nowrap}th{background:#f7f9f9;color:#74827e;padding:12px 17px;font-weight:500;font-size:13px}td{padding:17px;border-bottom:1px solid #edf1ef;font-size:14px}td small{display:block;font-size:12px}tbody tr:last-child td{border-bottom:0}tbody tr:hover{background:#fafcfb}.student-link{display:flex;align-items:center;gap:11px;text-align:left;background:none;padding:0;color:var(--ink)}.student-link b{font-weight:600;font-size:14px}.student-avatar{width:36px;height:36px;background:#edf1f8;color:#5f7191;display:flex;align-items:center;justify-content:center;border-radius:9px;font-size:14px}.progress-line{display:flex;gap:10px;align-items:center;font-size:12px;color:var(--muted)}progress{appearance:none;width:78px;height:5px;border:0;border-radius:10px;overflow:hidden}progress::-webkit-progress-bar{background:#e9efed}progress::-webkit-progress-value{background:#439781;border-radius:10px}progress::-moz-progress-bar{background:#439781}.badge{font-size:12px;padding:4px 9px;border-radius:4px;display:inline-block;white-space:nowrap}.green{background:#e7f4ee;color:#257761}.amber{background:#fff0df;color:#a16626}.neutral{background:#f0f3f5;color:#75828d}.overdue,.overdue small{color:#b96830}.table-footer{padding:16px 23px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}.empty{text-align:center;padding:50px 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0;white-space:pre-wrap}.form-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}.required{color:#b04134}.login-layout{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;background:white}.login-intro{background:#123e37;padding:55px 65px;color:white;display:flex;flex-direction:column;justify-content:space-between}.login-intro .brand-mark{background:#2a7e6b}.login-intro .eyebrow{color:#94c6b6}.login-intro h1{font-size:48px;line-height:1.5;letter-spacing:-1px}.login-intro>div>p:last-child{margin-top:25px;color:#b8d0c8;max-width:380px}.login-foot{font-size:13px;color:#94b7aa}.login-form{display:flex;align-items:center;justify-content:center;padding:40px}.login-form form{width:100%;max-width:360px}.login-form h2{font-size:29px;margin-bottom:12px}.login-form label{margin-top:26px}.login-form .primary{width:100%;margin-top:12px;padding:13px}.password-screen{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:30px}.password-screen form{width:100%;max-width:440px;background:white;padding:35px;border:1px solid var(--line);border-radius:12px}.password-screen h1{font-size:24px;margin:20px 0 8px}.password-screen button{margin-top:12px}dialog{border:0;border-radius:12px;padding:0;width:520px;max-width:calc(100vw - 32px);max-height:calc(100dvh - 50px);box-shadow:0 20px 100px #0a292333;color:var(--ink)}dialog.wide{width:1000px}dialog::backdrop{background:#122c285e;backdrop-filter:blur(2px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;padding:20px 26px;border-bottom:1px solid var(--line);position:sticky;top:0;background:white;z-index:1}.dialog-head h2{font-size:20px}.icon-button{background:#f2f5f3;color:#5b6e65;width:32px;height:32px;border-radius:50%;font-size:24px;line-height:1}.dialog-body{padding:24px 26px}.dialog-body>p{font-size:14px}.detail-summary{display:flex;flex-wrap:wrap;gap:8px 25px;font-size:14px;color:var(--muted)}.student-notes{background:#f5f8f6;padding:12px 15px;border-radius:6px;margin:14px 0;white-space:pre-wrap}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-top:25px}.node-list{margin-top:12px;display:grid;gap:8px}.node-row{display:flex;justify-content:space-between;gap:10px;align-items:center;background:#f8faf9;border:1px solid var(--line);border-radius:6px;padding:10px 12px;text-align:left;font-size:14px}.node-row.active{border-color:#72a998;background:#eff8f3}.node-row.active>span:first-child{color:var(--green);font-weight:600}#progress-editor{padding-top:22px}.history{border-left:1px solid var(--line);padding-left:25px}.history h3 span{font-size:13px;color:var(--muted);font-weight:400;margin-left:8px}.history article{border-bottom:1px solid var(--line);padding:18px 0}.history article>div{display:flex;justify-content:space-between;gap:8px;font-size:14px}.history article p{font-size:14px;margin:12px 0;white-space:pre-wrap;overflow-wrap:anywhere}.history article small{font-size:12px}.permission-note{margin-top:15px}.file-picker{padding:20px;background:#f3f7f5;border:1px dashed #b7ccc3;border-radius:8px;margin:22px 0}.file-picker input{background:transparent;border:0;font-size:14px;padding:5px 0}#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(20px);padding:12px 22px;background:#183c32;color:white;font-size:14px;border-radius:8px;z-index:100;opacity:0;pointer-events:none;transition:.2s;max-width:90vw;box-shadow:0 6px 30px #0d33252b}#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}.loading{padding:50px;text-align:center;color:var(--muted)}@media(min-width:1450px){td{padding:20px}.stats button{padding:23px 25px}}@media(max-width:1100px){.workspace{grid-template-columns:195px 1fr}.sidebar{padding:25px 12px}.brand{font-size:16px;gap:9px}.brand-mark{width:33px;height:33px}#content{padding:25px 22px}.topbar{padding:0 22px}.stats{gap:10px}.stats button{padding:15px}.stats p{font-size:12px}.actions{justify-content:flex-end}.page-heading h1{font-size:27px}.tabs{gap:16px}.toolbar{padding:0 16px}.searchbar{padding:16px}.login-intro{padding:45px}.login-intro h1{font-size:40px}}@media(max-width:760px){.workspace{display:block}.sidebar{position:static;height:auto;padding:14px 16px;display:block;border-right:0;border-bottom:1px solid var(--line)}.sidebar .brand{font-size:17px}.sidebar .brand small,.nav-label,.sidebar-note,.account{display:none}.sidebar nav{display:flex;gap:8px;margin-top:12px;overflow-x:auto}.nav-button{width:auto;white-space:nowrap;padding:8px 12px;font-size:13px;margin:0}.topbar{height:52px;padding:0 16px;font-size:12px}.topbar .text-button{font-size:12px}.topbar>div{gap:8px}.topbar>span{font-size:12px}.demo-banner{padding:10px 16px;font-size:12px}#content{padding:23px 16px}.page-heading{display:block;margin-bottom:20px}.page-heading h1{font-size:27px}.page-heading>.primary{margin-top:16px}.actions{justify-content:flex-start;margin-top:17px}.stats{grid-template-columns:1fr 1fr;gap:10px;margin-bottom:20px}.stats button{padding:14px}.stats strong{font-size:30px}.stats p{font-size:12px}.tabs{gap:17px}.tab{font-size:13px;white-space:nowrap;padding:15px 0 12px}.toolbar{align-items:flex-start;gap:6px;flex-wrap:wrap;padding:0 13px 8px;min-height:55px}.toolbar>.muted{font-size:12px}.searchbar{flex-wrap:wrap;padding:13px}.search-label{width:100%}.searchbar select{max-width:100%;flex:1;font-size:14px;margin:0}.batch{padding:0 13px 10px;gap:12px;flex-wrap:wrap}.table-footer{display:block;padding:12px;font-size:11px}.table-footer span{display:block}.detail-grid{grid-template-columns:1fr;gap:30px}.history{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:20px}.dialog-head,.dialog-body{padding:18px}.setting-row{padding:17px;gap:10px;flex-wrap:wrap}.setting-row p{font-size:12px}.setting-row .number{padding:7px}.tip{padding:16px;font-size:13px}.login-layout{grid-template-columns:1fr}.login-intro{padding:25px;min-height:auto;gap:25px}.login-intro h1{font-size:30px;line-height:1.4}.login-intro>div>p:last-child,.login-foot{display:none}.login-form{padding:30px 25px 45px;align-items:flex-start}.login-form form{max-width:440px}.login-form h2{font-size:24px}.login-form label{margin-top:18px}.password-screen{padding:20px}.password-screen form{padding:25px}}
.mobile-logout{display:none}@media(max-width:760px){.mobile-logout{display:inline-block}}
fieldset{border:1px solid var(--line);border-radius:8px;margin:20px 0;padding:4px 15px 16px}legend{font-size:14px;font-weight:700;color:var(--green);padding:0 6px}.report-summary{display:flex;gap:5px;flex-wrap:wrap;max-width:230px}.report-summary small{flex-basis:100%}.searchbar{flex-wrap:wrap}#report-form>.muted{margin-top:10px;font-size:13px}[hidden]{display:none!important}
.source-info{margin-top:14px;font-size:14px;border:1px solid var(--line);padding:12px;border-radius:6px}.source-info summary{cursor:pointer;color:var(--green)}.source-info dl{display:grid;grid-template-columns:130px 1fr;gap:8px;margin:12px 0}.source-info dt{color:var(--muted)}.source-info dd{margin:0;white-space:pre-wrap;overflow-wrap:anywhere}.source-warning{background:#fff4dd;color:#805c26;padding:10px;margin:10px 0;font-size:14px}.date-precision{font-weight:400;font-size:13px;color:var(--muted);display:flex;gap:7px;align-items:center}.date-precision input{width:15px;height:15px}
.list-pagination{padding:14px 23px;display:flex;justify-content:space-between;gap:12px;align-items:center;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.list-pagination>div{display:flex;gap:8px}.list-pagination button:disabled{cursor:default}@media(max-width:760px){.list-pagination{padding:12px;flex-wrap:wrap}}

.profile-cell{min-width:95px;max-width:220px;white-space:normal;word-break:break-word}.profile-strip{display:flex;gap:24px;flex-wrap:wrap;padding:16px 0}.profile-strip>div{min-width:110px;flex:1}.profile-strip small,.profile-strip b{display:block}.profile-strip small{color:var(--muted);margin-bottom:6px}
.management-stats{grid-template-columns:repeat(3,minmax(0,1fr))}.issue-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;padding:18px}.issue-grid button{display:flex;flex-direction:column;align-items:flex-start;gap:12px;padding:16px;background:#f6f9f8;border:1px solid #dce9e5;border-radius:10px}.issue-grid b{color:#176f64}.board-note{padding:12px 20px}.deadline-info{padding:12px;background:#f4f8f6;border-radius:8px;margin-bottom:16px}.panel+.panel{margin-top:24px}@media(max-width:800px){.management-stats,.issue-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}