:root{
  --green:#0f6b55;
  --green-2:#eaf5f1;
  --green-3:#d7ebe4;
  --ink:#17211d;
  --muted:#6b7771;
  --line:#dce5e1;
  --panel:#f6f9f8;
  --white:#fff;
  --yellow:#a96e00;
  --yellow-bg:#fff7df;
  --red:#b42318;
  --red-bg:#fff0ee;
  --blue:#2367a8;
  --shadow:0 12px 34px rgba(22,50,41,.08);
}
*{box-sizing:border-box}
html{font-family:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif;background:#f3f7f5;color:var(--ink)}
body{margin:0;min-height:100vh}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
a{color:inherit}
.hidden{display:none!important}
.shell{max-width:1280px;margin:0 auto;padding:24px}
.auth-shell{min-height:100vh;display:grid;place-items:center;padding:24px}
.auth-card{width:min(520px,100%);background:var(--white);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:30px}
.brand{display:flex;align-items:center;gap:14px}.brand img{height:56px;max-width:250px;object-fit:contain}.brand-text h1{margin:0;font-size:21px}.brand-text p{margin:5px 0 0;color:var(--muted);font-size:13px}
.auth-tabs{display:grid;grid-template-columns:1fr 1fr;background:var(--panel);border-radius:12px;padding:4px;margin:24px 0 18px}.auth-tabs button{border:0;background:transparent;padding:10px;border-radius:9px}.auth-tabs button.active{background:var(--white);box-shadow:0 2px 8px rgba(0,0,0,.06);font-weight:700}
.form-grid{display:grid;gap:14px}.form-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.field label{display:block;font-size:13px;font-weight:650;margin-bottom:6px}.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);border-radius:11px;padding:11px 12px;background:#fff;color:var(--ink);outline:none}.field textarea{min-height:94px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(15,107,85,.11)}
.btn{border:1px solid transparent;border-radius:11px;padding:10px 14px;font-weight:700;min-height:42px}.btn.primary{background:var(--green);color:#fff}.btn.secondary{background:#fff;border-color:var(--line);color:var(--ink)}.btn.ghost{background:transparent;border-color:var(--line)}.btn.danger{background:var(--red-bg);color:var(--red);border-color:#ffd0cb}.btn.small{min-height:34px;padding:7px 10px;font-size:12px}.btn:disabled{opacity:.55;cursor:not-allowed}
.notice{border:1px solid var(--line);background:var(--panel);border-radius:11px;padding:12px 14px;font-size:13px;line-height:1.6}.notice.error{background:var(--red-bg);border-color:#ffd0cb;color:var(--red)}.notice.success{background:var(--green-2);border-color:var(--green-3);color:var(--green)}
.topbar{background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.topbar-inner{max-width:1280px;margin:0 auto;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;gap:18px}.mini-brand{display:flex;align-items:center;gap:12px;min-width:0}.mini-brand img{height:38px;max-width:210px;object-fit:contain}.mini-title{min-width:0}.mini-title strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mini-title span{display:block;color:var(--muted);font-size:12px;margin-top:2px}.userbox{display:flex;align-items:center;gap:10px}.role-pill{font-size:12px;border-radius:999px;padding:6px 9px;background:var(--green-2);color:var(--green);font-weight:700}
.app-layout{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:210px minmax(0,1fr);gap:24px;padding:24px}.sidebar{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:10px;height:max-content;position:sticky;top:86px}.nav-btn{width:100%;border:0;background:transparent;text-align:left;padding:11px 12px;border-radius:10px;color:var(--muted);font-weight:650;margin:2px 0}.nav-btn:hover{background:var(--panel)}.nav-btn.active{background:var(--green-2);color:var(--green)}
.page{min-width:0}.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:18px}.page-head h2{font-size:24px;margin:0}.page-head p{margin:6px 0 0;color:var(--muted);font-size:13px;line-height:1.55}.actions{display:flex;flex-wrap:wrap;gap:8px}
.kpis{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}.kpi{background:var(--white);border:1px solid var(--line);border-radius:15px;padding:15px}.kpi .label{font-size:12px;color:var(--muted)}.kpi .value{font-size:26px;font-weight:800;margin-top:5px}.kpi .sub{font-size:11px;color:var(--muted);margin-top:3px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:16px}.card h3{font-size:15px;margin:0}.card .muted{color:var(--muted);font-size:13px}.section-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:24px 0 10px}.section-title h3{margin:0;font-size:17px}.section-title span{font-size:12px;color:var(--muted)}
.progressbar{height:8px;border-radius:999px;background:#e9efec;overflow:hidden}.progressbar>span{display:block;height:100%;background:var(--green);border-radius:inherit}.course-row,.issue-row,.score-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 0;border-top:1px solid var(--line)}.course-row:first-child,.issue-row:first-child,.score-row:first-child{border-top:0}.row-main{min-width:0}.row-title{font-weight:750}.row-meta{font-size:12px;color:var(--muted);margin-top:4px}.row-right{text-align:right;flex:0 0 auto}.traffic{display:inline-flex;align-items:center;gap:5px;border-radius:999px;padding:5px 8px;font-size:12px;font-weight:750}.traffic.green{background:var(--green-2);color:var(--green)}.traffic.yellow{background:var(--yellow-bg);color:var(--yellow)}.traffic.red{background:var(--red-bg);color:var(--red)}
.group-card .group-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px}.statbox{background:var(--panel);border-radius:10px;padding:10px;text-align:center}.statbox strong{display:block;font-size:18px}.statbox span{font-size:11px;color:var(--muted)}
.table-wrap{overflow:auto;background:var(--white);border:1px solid var(--line);border-radius:16px}.table{width:100%;border-collapse:collapse;min-width:820px}.table th,.table td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;font-size:13px;vertical-align:top}.table th{font-size:11px;text-transform:none;letter-spacing:.02em;color:var(--muted);background:#fafcfb}.table tr:last-child td{border-bottom:0}
.badge{display:inline-block;border-radius:999px;padding:5px 8px;background:var(--panel);font-size:11px;font-weight:700}.badge.pending{background:var(--yellow-bg);color:var(--yellow)}.badge.approved{background:var(--green-2);color:var(--green)}.badge.returned{background:var(--red-bg);color:var(--red)}
.steps{display:flex;gap:4px;margin-top:12px}.step{height:6px;flex:1;background:#e7eeeb;border-radius:999px}.step.done{background:var(--green)}
.modal-backdrop{position:fixed;inset:0;background:rgba(15,28,23,.42);display:grid;place-items:center;padding:20px;z-index:100}.modal{width:min(760px,100%);max-height:88vh;overflow:auto;background:#fff;border-radius:18px;padding:20px;box-shadow:0 18px 60px rgba(0,0,0,.2)}.modal-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:16px}.modal-head h3{margin:0;font-size:18px}.modal-close{border:0;background:var(--panel);border-radius:9px;width:36px;height:36px;font-size:18px}
.empty{padding:28px;text-align:center;color:var(--muted);font-size:13px}.loader{display:inline-block;width:18px;height:18px;border:2px solid #dce5e1;border-top-color:var(--green);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.footer-note{font-size:11px;color:var(--muted);text-align:center;margin:22px 0 6px}.setup-box{border:1px solid var(--yellow);background:var(--yellow-bg);padding:14px;border-radius:12px;margin-top:14px}.code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;background:#f0f3f2;padding:2px 5px;border-radius:5px;font-size:12px}
@media(max-width:980px){.app-layout{grid-template-columns:1fr}.sidebar{position:static;display:flex;overflow:auto;gap:4px}.nav-btn{width:auto;white-space:nowrap}.kpis{grid-template-columns:repeat(3,1fr)}.grid-3{grid-template-columns:1fr 1fr}}
@media(max-width:680px){.shell,.topbar-inner,.app-layout{padding:14px}.auth-card{padding:20px}.brand{align-items:flex-start}.brand img{height:44px}.form-grid.two,.grid-2,.grid-3{grid-template-columns:1fr}.kpis{grid-template-columns:1fr 1fr}.page-head{align-items:flex-start;flex-direction:column}.topbar-inner{align-items:flex-start}.mini-brand img{height:32px;max-width:160px}.userbox{gap:6px}.role-pill{display:none}.btn{min-height:44px}.course-row,.issue-row,.score-row{align-items:flex-start}.row-right{max-width:42%}}