:root{
  --bg:#f4f6f9; --card:#fff; --ink:#1f2937; --sub:#6b7280; --line:#e5e7eb;
  --brand:#2563eb; --brand-soft:#eff6ff; --ok:#059669; --warn:#d97706; --danger:#dc2626;
  --radius:10px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);color:var(--ink);
  font:14px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
[v-cloak]{display:none}

/* 布局 */
.topbar{
  position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:14px;
  height:56px;padding:0 18px;background:#fff;border-bottom:1px solid var(--line);
}
.topbar .logo{font-size:16px;font-weight:600;letter-spacing:.5px}
.topbar .logo span{color:var(--brand)}
.topbar .spacer{flex:1}
.topbar .who{color:var(--sub);font-size:13px}
.wrap{max-width:1180px;margin:0 auto;padding:18px}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px;overflow-x:auto}
.tabs button{
  border:0;background:none;padding:10px 14px;font-size:14px;color:var(--sub);cursor:pointer;
  border-bottom:2px solid transparent;white-space:nowrap;
}
.tabs button.on{color:var(--brand);border-bottom-color:var(--brand);font-weight:600}

/* 卡片 */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:16px}
.card h3{margin:0 0 12px;font-size:15px;font-weight:600}
.card .hint{color:var(--sub);font-size:12.5px;margin:-6px 0 12px}
.grid{display:grid;gap:12px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.row.end{justify-content:flex-end}

/* 控件 */
button.btn{
  border:1px solid var(--line);background:#fff;color:var(--ink);padding:7px 14px;border-radius:8px;
  font-size:13.5px;cursor:pointer;transition:.15s;
}
button.btn:hover{border-color:#c7d2fe;background:#fafbff}
button.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
button.btn.primary:hover{background:#1d4ed8}
button.btn.danger{color:var(--danger);border-color:#fecaca}
button.btn.danger:hover{background:#fef2f2}
button.btn.ghost{background:none;border-color:transparent;color:var(--brand)}
button.btn:disabled{opacity:.5;cursor:not-allowed}
button.btn.sm{padding:4px 10px;font-size:12.5px}
input,select,textarea{
  width:100%;padding:7px 10px;border:1px solid var(--line);border-radius:8px;font:inherit;
  background:#fff;color:var(--ink);outline:none;
}
input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
label.fld{display:block;font-size:12.5px;color:var(--sub);margin-bottom:4px}

/* 表格 */
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{padding:8px 10px;text-align:left;border-bottom:1px solid var(--line)}
th{color:var(--sub);font-weight:500;font-size:12.5px;background:#fafbfc;white-space:nowrap}
tbody tr:hover{background:#fbfcfe}
td.num{text-align:right;font-variant-numeric:tabular-nums}

/* 标签 */
.tag{display:inline-block;padding:1px 8px;border-radius:20px;font-size:12px;background:#f3f4f6;color:var(--sub)}
.tag.ok{background:#ecfdf5;color:var(--ok)}
.tag.warn{background:#fffbeb;color:var(--warn)}
.tag.danger{background:#fef2f2;color:var(--danger)}
.tag.info{background:var(--brand-soft);color:var(--brand)}

/* 进度条 */
.bar{height:6px;background:#eef1f6;border-radius:6px;overflow:hidden}
.bar>i{display:block;height:100%;background:var(--brand);transition:width .3s}

/* 弹窗 */
.mask{position:fixed;inset:0;background:rgba(15,23,42,.45);display:flex;align-items:center;
  justify-content:center;z-index:60;padding:16px}
.modal{background:#fff;border-radius:12px;padding:20px;width:min(560px,100%);max-height:88vh;overflow:auto}
.modal.wide{width:min(920px,100%)}
.modal h3{margin:0 0 14px;font-size:16px}

/* 登录页 */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.login-box{width:min(360px,100%);background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px}
.login-box h1{font-size:20px;margin:0 0 4px;text-align:center}
.login-box p.sub{margin:0 0 22px;text-align:center;color:var(--sub);font-size:13px}
.login-box .fld-wrap{margin-bottom:12px}

/* 提示条 */
.toast{position:fixed;left:50%;top:74px;transform:translateX(-50%);background:#111827;color:#fff;
  padding:9px 18px;border-radius:8px;font-size:13.5px;z-index:99;box-shadow:0 8px 24px rgba(0,0,0,.18)}
.toast.err{background:var(--danger)}

/* 阅卷页 */
.mark-shell{display:flex;flex-direction:column;height:100vh;background:#0f172a}
.mark-bar{display:flex;align-items:center;gap:12px;padding:8px 14px;background:#111827;color:#e5e7eb;flex-wrap:wrap}
.mark-bar .item-no{font-weight:600;color:#fff}
.mark-bar .dim{color:#9ca3af;font-size:12.5px}
.mark-stage{flex:1;display:flex;min-height:0}
.mark-img{flex:1;display:flex;align-items:center;justify-content:center;padding:12px;overflow:auto;background:#0b1220}
.mark-img img{max-width:100%;max-height:calc(100vh - 150px);background:#fff;border-radius:6px;
  box-shadow:0 10px 30px rgba(0,0,0,.4)}
.mark-side{width:300px;background:#fff;padding:16px;display:flex;flex-direction:column;gap:12px;overflow:auto}
.score-big{font-size:40px;font-weight:700;text-align:center;font-variant-numeric:tabular-nums;color:var(--brand)}
.quick{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.quick button{padding:8px 0;border:1px solid var(--line);background:#fff;border-radius:8px;cursor:pointer;font-size:13px}
.quick button:hover{background:var(--brand-soft);border-color:#bfdbfe}
.kbd{display:inline-block;padding:0 5px;border:1px solid #d1d5db;border-bottom-width:2px;border-radius:4px;
  font-size:11px;color:var(--sub);background:#f9fafb;margin-left:4px}
.empty{color:var(--sub);text-align:center;padding:40px 12px}

@media (max-width:760px){
  .g2,.g3,.g4{grid-template-columns:1fr}
  .mark-side{width:100%;position:fixed;bottom:0;left:0;right:0;max-height:46vh;border-top-left-radius:14px;
    border-top-right-radius:14px;z-index:30}
  .mark-img img{max-height:calc(100vh - 320px)}
}