:root{--primary:#409eff;--primary-dark:#1890ff;--primary-hover:#66b1ff;--primary-soft:#ecf5ff;--primary-border:#b3d8ff;--menu-selected:#d0ebfe;--success:#67c23a;--success-soft:#f0f9eb;--success-border:#e1f3d8;--warning:#e6a23c;--warning-soft:#fdf6ec;--warning-border:#faecd8;--danger:#f56c6c;--danger-soft:#fef0f0;--danger-border:#fde2e2;--ink:#303133;--text:#606266;--muted:#909399;--placeholder:#c0c4cc;--line:#ebeef5;--line-light:#edf2f7;--border:#dcdfe6;--canvas:#f5f7fa;--surface:#fff;font-family:-apple-system,"system-ui",Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:14px;line-height:1.5;color:var(--text);background:var(--canvas);font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-hover)}button,input,select{font:inherit}button,.upload{display:inline-block;border:1px solid var(--border);border-radius:4px;padding:0 15px;height:32px;line-height:30px;background:var(--surface);color:var(--text);cursor:pointer;font-size:14px;white-space:nowrap;vertical-align:middle;transition:color .15s,background-color .15s,border-color .15s}button:hover,.upload:hover{color:var(--primary);border-color:var(--primary-border);background:var(--primary-soft)}button:focus-visible,.upload:focus-visible,a:focus-visible{outline:2px solid var(--primary-border);outline-offset:1px}button:disabled,button:disabled:hover{color:var(--placeholder);border-color:var(--line);background:var(--surface);cursor:not-allowed}.primary,.primary:disabled{background:var(--primary);color:#fff;border-color:var(--primary)}.primary:hover{background:var(--primary-hover);border-color:var(--primary-hover);color:#fff}.primary:disabled{opacity:.5}button.danger{color:var(--danger);border-color:#fbc4c4;background:var(--danger-soft)}button.danger:hover{background:var(--danger);border-color:var(--danger);color:#fff}td button,td button.primary,th button{border:0;background:none;padding:0 6px;height:auto;line-height:inherit;color:var(--primary);font-size:13px}th button{font-size:12px;font-weight:400}td button:hover,td button.primary:hover,th button:hover{color:var(--primary-hover);background:none}td button.danger{color:var(--danger)}td button.danger:hover{color:#f78989}td button:disabled,td button:disabled:hover,th button:disabled{color:var(--placeholder);background:none}.full{width:100%}input,select{padding:0 12px;height:32px;border:1px solid var(--border);border-radius:4px;background:var(--surface);color:var(--text)}input::placeholder{color:var(--placeholder)}input:focus,select:focus{outline:0;border-color:var(--primary)}input[type=checkbox],input[type=radio]{height:auto;padding:0;accent-color:var(--primary)}h1,h2,h3,p{margin-top:0}h1{font-size:20px;font-weight:600;line-height:28px;margin-bottom:8px;color:var(--ink)}h2{font-size:16px;font-weight:600;line-height:24px;color:var(--ink)}h3{font-size:14px;font-weight:600;line-height:22px;color:var(--ink)}small{font-size:12px}.muted{color:var(--muted);font-size:13px;line-height:1.6}.eyebrow{display:block;color:var(--muted);font-size:12px;letter-spacing:1px;margin-bottom:8px}.wordmark{font-size:22px;font-weight:700;color:var(--primary);letter-spacing:-.5px}header{height:64px;padding:0 5%;display:flex;align-items:center;gap:60px;background:var(--surface);border-bottom:1px solid var(--line)}nav{display:flex;gap:32px;height:100%;align-items:center}nav a{height:100%;display:flex;align-items:center;color:var(--text);font-size:14px;border-bottom:2px solid transparent}nav a.selected{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}.user{margin-left:auto;font-size:14px;display:flex;align-items:center;gap:20px}.text{border:0;padding:5px;color:var(--muted)}main{max-width:1440px;margin:0 auto;padding:35px 5%;min-height:calc(100vh - 140px)}footer{text-align:center;color:var(--muted);font-size:12px;padding:20px}.page-head{display:flex;align-items:center;justify-content:space-between;margin:9px 0 26px;gap:20px}.page-head p{margin:0}.panel{background:var(--surface);border:1px solid #e8edf3;border-radius:4px;overflow:hidden}.toolbar{display:flex;gap:8px;margin-bottom:16px}.toolbar input{width:240px}table{width:100%;border-collapse:collapse;text-align:left}th{background:#f8f9fb;font-size:12px;font-weight:600;color:var(--muted);padding:10px 12px;white-space:nowrap}td{padding:10px 12px;border-top:1px solid var(--line-light);font-size:13px;color:var(--text)}tr:hover td{background:#f8fbff}.title-link{font-weight:600;color:var(--ink)}.title-link:hover{color:var(--primary)}.tag{display:inline-block;background:#f4f4f5;border:1px solid #e9e9eb;border-radius:4px;padding:0 6px;line-height:20px;font-size:12px;color:var(--muted);white-space:nowrap}.empty{padding:48px 20px;text-align:center;color:var(--muted)}.breadcrumb{color:var(--muted);font-size:13px;margin-bottom:22px}.workspace{display:grid;grid-template-columns:minmax(0,calc(var(--split,47%) - 11px)) 22px minmax(0,1fr);align-items:start}.splitter{align-self:stretch;position:relative;cursor:col-resize;touch-action:none;border-radius:4px}.splitter:before{content:"";position:absolute;top:0;bottom:0;left:50%;width:2px;margin-left:-1px;background:var(--border,#dfe4ea);transition:background .15s}.splitter:after{content:"";position:absolute;top:50%;left:50%;width:6px;height:36px;margin:-18px 0 0 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h3{font-size:13px;font-weight:500;color:var(--muted);margin-bottom:10px}.stat-card strong{font-size:28px;line-height:1.2;color:var(--ink);font-variant-numeric:tabular-nums}.stat-card>span{font-size:13px;color:var(--muted);margin-left:6px}.dashboard-grid{display:grid;grid-template-columns:minmax(0,2.1fr) minmax(280px,1fr);gap:16px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.section-head h2,.section-head h3{margin:0}.table-scroll{overflow:auto}td small{display:block;font-size:12px;margin-top:4px;color:var(--muted)}.dashboard-contest{padding:10px 0 14px;border-bottom:1px solid var(--line);margin-bottom:10px}.dashboard-contest:last-child{border:0;margin:0;padding-bottom:0}.dashboard-contest .button{margin-top:10px}.quick-links{display:flex;flex-direction:column}.quick-links a{padding:12px 0;border-bottom:1px solid var(--line)}.quick-links a:last-child{border:0}.compact{padding:20px 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a,.tabs button{padding:0 2px;height:44px;line-height:44px;border:0;border-bottom:2px solid transparent;border-radius:0;background:none;color:var(--text);white-space:nowrap;font-size:14px}.tabs a:hover,.tabs button:hover{color:var(--primary);background:none}.tabs .selected,.tabs .selected:hover{border-bottom-color:var(--primary);color:var(--primary);font-weight:600}.meta-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:16px}.meta-grid .panel{padding:16px 20px}.meta-grid strong{display:block;margin-top:10px;color:var(--ink)}.nav-toggle{display:none}dialog{border:1px solid var(--line);border-radius:6px;padding:24px;max-width:calc(100vw - 48px);width:600px;max-height:90vh;color:var(--text);box-shadow:0 16px 48px #1f2d3d2e}dialog.wide{width:1100px}dialog::backdrop{background:#10283c66}.modal-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px;padding-bottom:14px;border-bottom:1px solid var(--line)}.modal-head 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0}.pagination{display:flex;justify-content:flex-end;align-items:center;gap:16px;margin:16px 0}.account-form{gap:16px}.card-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.dashboard-grid table{border:1px solid var(--line)}.dashboard-grid td+td,.dashboard-grid th+th{border-left:1px solid var(--line)}.dashboard-grid th,.dashboard-grid td:last-child{white-space:nowrap}@media(min-width:1800px){.workspace-main{max-width:1600px;margin:0 auto}}@media(max-width:1200px){.app-shell{grid-template-columns:196px minmax(0,1fr)}.workspace-main{padding:20px}.topbar{padding:0 20px}.sidebar nav a{padding:0 12px}.dashboard-grid{grid-template-columns:minmax(0,1.8fr) minmax(260px,1fr)}.stat-card{padding:16px}.dashboard-grid td{padding:10px}}@media(max-width:900px){.app-shell{display:block}.sidebar{display:none;position:fixed;width:224px;z-index:40;box-shadow:0 0 0 100vw #192d4066}.collapsed .sidebar,.nav-toggle{display:block}.topbar .breadcrumb{display:none}.topbar 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