/* ============ 基础 ============ */
:root{
  --bg:#f4f6fb;
  --surface:#ffffff;
  --surface-2:#f8fafc;
  --line:#e4e9f2;
  --line-2:#cbd5e1;
  --text:#0f172a;
  --muted:#64748b;
  --muted-2:#94a3b8;
  --primary:#3b5bfd;
  --primary-dark:#2c46d6;
  --primary-weak:#eef2ff;
  --green:#16a34a;
  --green-weak:#e9f8ee;
  --red:#dc2626;
  --red-weak:#fdeeee;
  --amber:#d97706;
  --amber-weak:#fef4e6;
  --radius:14px;
  --radius-sm:9px;
  --shadow:0 1px 2px rgba(15,23,42,.04), 0 10px 28px -18px rgba(15,23,42,.28);
  --sidebar-w:228px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei",-apple-system,"Segoe UI",system-ui,sans-serif;
  background:var(--bg);color:var(--text);font-size:14px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p{margin:0}
a{color:var(--primary);text-decoration:none}
button{font-family:inherit}
.hidden{display:none !important}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#d5dce8;border-radius:8px;border:3px solid var(--bg)}
::-webkit-scrollbar-track{background:transparent}

/* ============ 登录页 ============ */
.login-wrap{min-height:100vh;display:grid;grid-template-columns:1.15fr .85fr}
.login-brand{
  background:linear-gradient(150deg,#1e2a78 0%,#3b5bfd 55%,#5b7cff 100%);
  color:#fff;padding:64px 60px;display:flex;flex-direction:column;justify-content:center;
  position:relative;overflow:hidden;
}
.login-brand::after{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.18),transparent 62%);
  right:-160px;bottom:-190px;
}
.login-brand::before{
  content:"";position:absolute;width:320px;height:320px;border-radius:50%;
  border:1px solid rgba(255,255,255,.18);left:-120px;top:-90px;
}
.brand-mark{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:600;letter-spacing:.4px;opacity:.96}
.login-brand h1{font-size:38px;line-height:1.28;margin-top:40px;letter-spacing:-.5px}
.login-sub{margin-top:14px;font-size:15px;color:rgba(255,255,255,.82);max-width:420px}
.brand-points{list-style:none;padding:0;margin:34px 0 0;display:grid;gap:13px;max-width:460px;position:relative;z-index:1}
.brand-points li{font-size:13.5px;color:rgba(255,255,255,.86);display:flex;gap:10px;align-items:flex-start}
.brand-points li b{color:#fff;font-weight:600;flex:none;background:rgba(255,255,255,.14);border-radius:6px;padding:1px 7px;font-size:12px;margin-top:2px}
.brand-foot{margin-top:46px;font-size:12.5px;color:rgba(255,255,255,.62)}

.login-panel{display:flex;align-items:center;justify-content:center;padding:40px}
.login-card{width:100%;max-width:388px}
.login-tabs{display:flex;gap:6px;background:#e9edf6;padding:5px;border-radius:12px;margin-bottom:28px}
.login-tab{
  flex:1;border:0;background:transparent;padding:9px;border-radius:9px;font-size:14px;
  color:var(--muted);cursor:pointer;transition:.18s;font-weight:500;
}
.login-tab.active{background:#fff;color:var(--text);box-shadow:0 1px 3px rgba(15,23,42,.1);font-weight:600}
.login-card .field span{font-size:13px;color:var(--muted)}
.login-error{color:var(--red);font-size:13px;min-height:20px;margin:2px 0 8px}
.login-hint{margin-top:20px;font-size:12.5px;color:var(--muted-2);text-align:center;line-height:1.8}

/* ============ 布局 ============ */
.app{display:flex;min-height:100vh}
.sidebar{
  width:var(--sidebar-w);flex:none;background:#0f1830;color:#cbd5e1;
  display:flex;flex-direction:column;position:sticky;top:0;height:100vh;z-index:60;
}
.side-brand{
  height:62px;display:flex;align-items:center;gap:10px;padding:0 20px;
  font-size:15.5px;font-weight:600;color:#fff;letter-spacing:.3px;border-bottom:1px solid rgba(255,255,255,.07);
}
.logo-dot{
  width:22px;height:22px;border-radius:7px;flex:none;
  background:linear-gradient(140deg,#5b7cff,#8ba3ff);box-shadow:0 0 0 3px rgba(91,124,255,.18);
}
.nav{padding:14px 10px;display:flex;flex-direction:column;gap:3px;flex:1;overflow:auto}
.nav-item{
  display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:9px;
  color:#a9b6cd;font-size:13.6px;cursor:pointer;transition:.15s;border:0;background:transparent;text-align:left;width:100%;
}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{background:var(--primary);color:#fff;font-weight:500;box-shadow:0 6px 16px -8px var(--primary)}
.nav-item svg{opacity:.9;flex:none}
.nav-item .nav-badge{margin-left:auto;background:var(--red);color:#fff;font-size:11px;border-radius:20px;padding:0 7px;line-height:18px}
.nav-item.active .nav-badge{background:rgba(255,255,255,.28)}
.side-foot{padding:14px 18px;border-top:1px solid rgba(255,255,255,.07);font-size:11.5px;color:#6b7a94;line-height:1.8}
.sidebar-mask{display:none}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{
  height:62px;flex:none;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px;padding:0 26px;
  position:sticky;top:0;z-index:40;
}
.crumb{font-size:15px;font-weight:600}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.role-chip{font-size:12px;color:var(--muted);background:var(--surface-2);border:1px solid var(--line);padding:4px 10px;border-radius:20px}
.role-chip b{color:var(--text);font-weight:600}
.icon-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:8px;width:34px;height:34px;align-items:center;justify-content:center;color:var(--muted);cursor:pointer}
.page{padding:26px;max-width:1320px;width:100%;margin:0 auto}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:1px solid var(--line-2);background:#fff;color:var(--text);
  padding:8px 15px;border-radius:9px;font-size:13.5px;cursor:pointer;
  transition:.16s;white-space:nowrap;font-weight:500;
}
.btn:hover{background:var(--surface-2);border-color:#b6c2d4}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 6px 16px -10px var(--primary)}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark)}
.btn-danger{background:#fff;border-color:#f0c4c4;color:var(--red)}
.btn-danger:hover{background:var(--red-weak)}
.btn-ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn-ghost:hover{background:#eef1f7;color:var(--text)}
.btn-sm{padding:5px 11px;font-size:12.5px;border-radius:7px}
.btn-lg{padding:12px 18px;font-size:15px;border-radius:11px}
.btn-block{width:100%}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.link-btn{background:none;border:0;color:var(--primary);cursor:pointer;font-size:13px;padding:2px 4px}
.link-btn:hover{text-decoration:underline}
.link-btn.danger{color:var(--red)}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-pad{padding:20px 22px}
.card-head{display:flex;align-items:center;gap:12px;padding:16px 20px;border-bottom:1px solid var(--line)}
.card-head h3{font-size:15px;font-weight:600}
.card-head .sub{font-size:12.5px;color:var(--muted)}
.card-head .spacer{flex:1}

.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.toolbar .spacer{flex:1}

.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field > span{font-size:12.8px;color:var(--muted);font-weight:500}
.field .hint{font-size:11.8px;color:var(--muted-2)}
input[type=text],input[type=password],input[type=number],input[type=date],input[type=datetime-local],select,textarea{
  width:100%;border:1px solid var(--line-2);border-radius:9px;padding:9px 12px;
  font-size:13.6px;font-family:inherit;background:#fff;color:var(--text);outline:none;transition:.16s;
}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(59,91,253,.12)}
textarea{resize:vertical;line-height:1.7}
select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='%2364748b'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:30px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.form-row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0 16px}

.badge{display:inline-flex;align-items:center;gap:4px;font-size:11.8px;padding:2px 9px;border-radius:20px;background:var(--surface-2);border:1px solid var(--line);color:var(--muted);white-space:nowrap;font-weight:500}
.badge-blue{background:var(--primary-weak);border-color:#dbe3ff;color:#3350dc}
.badge-green{background:var(--green-weak);border-color:#cdecd8;color:#15803d}
.badge-red{background:var(--red-weak);border-color:#f6d3d3;color:#c02626}
.badge-amber{background:var(--amber-weak);border-color:#f7e0bd;color:#b45309}
.badge-gray{background:#eef1f7;border-color:#e2e7f0;color:#5b6b85}

/* 表格 */
.table-wrap{overflow:auto;border-radius:0 0 var(--radius) var(--radius)}
table.tb{width:100%;border-collapse:collapse;font-size:13.4px}
table.tb th{
  text-align:left;font-weight:600;color:var(--muted);font-size:12.4px;
  padding:11px 16px;background:var(--surface-2);border-bottom:1px solid var(--line);white-space:nowrap;
}
table.tb td{padding:12px 16px;border-bottom:1px solid #eef1f7;vertical-align:middle}
table.tb tr:last-child td{border-bottom:0}
table.tb tbody tr:hover{background:#fafbfe}
table.tb .num{font-variant-numeric:tabular-nums}
.cell-stem{max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cell-actions{text-align:right;white-space:nowrap}
.muted{color:var(--muted)}
.small{font-size:12.4px}
.mono{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}

/* 空状态 */
.empty{padding:64px 20px;text-align:center;color:var(--muted-2)}
.empty .ico{font-size:30px;opacity:.5;margin-bottom:10px}
.empty h4{color:var(--muted);font-weight:600;font-size:14px;margin-bottom:6px}
.empty p{font-size:12.8px}

/* 统计卡片 */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(178px,1fr));gap:14px;margin-bottom:22px}
.stat{padding:17px 19px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);position:relative;overflow:hidden}
.stat .label{font-size:12.5px;color:var(--muted)}
.stat .value{font-size:27px;font-weight:650;letter-spacing:-.5px;margin-top:4px;font-variant-numeric:tabular-nums}
.stat .value small{font-size:13px;font-weight:500;color:var(--muted);margin-left:3px}
.stat .foot{font-size:11.8px;color:var(--muted-2);margin-top:6px}
.stat .bar-accent{position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary)}
.stat.green .bar-accent{background:var(--green)}
.stat.amber .bar-accent{background:var(--amber)}
.stat.red .bar-accent{background:var(--red)}

.section-title{display:flex;align-items:center;gap:10px;margin:26px 0 13px}
.section-title h3{font-size:15.5px;font-weight:650}
.section-title .spacer{flex:1}

.grid-2{display:grid;grid-template-columns:1.3fr 1fr;gap:18px;align-items:start}
.grid-3{display:grid;grid-template-columns:repeat(auto-fill,minmax(272px,1fr));gap:16px}

/* 模态框 */
.modal-mask{
  position:fixed;inset:0;background:rgba(15,23,42,.42);backdrop-filter:blur(3px);
  display:flex;align-items:center;justify-content:center;padding:24px;z-index:200;
  animation:fadeIn .16s ease;
}
.modal{
  background:#fff;border-radius:16px;width:100%;max-width:520px;max-height:90vh;display:flex;flex-direction:column;
  box-shadow:0 30px 70px -25px rgba(15,23,42,.5);animation:popIn .18s ease;
}
.modal.lg{max-width:840px}
.modal.xl{max-width:1080px}
.modal-head{display:flex;align-items:center;gap:12px;padding:18px 22px;border-bottom:1px solid var(--line)}
.modal-head h3{font-size:16px;font-weight:650}
.modal-head .close{margin-left:auto;background:none;border:0;font-size:22px;line-height:1;color:var(--muted-2);cursor:pointer;padding:0 2px}
.modal-head .close:hover{color:var(--text)}
.modal-body{padding:20px 22px;overflow:auto;flex:1}
.modal-foot{display:flex;gap:10px;justify-content:flex-end;padding:15px 22px;border-top:1px solid var(--line);background:var(--surface-2);border-radius:0 0 16px 16px}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes popIn{from{opacity:0;transform:translateY(10px) scale(.985)}to{opacity:1;transform:none}}

.toast-root{position:fixed;top:18px;left:50%;transform:translateX(-50%);z-index:400;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{
  background:#0f1830;color:#fff;padding:9px 18px;border-radius:10px;font-size:13.2px;
  box-shadow:0 14px 34px -16px rgba(15,23,42,.7);animation:slideDown .2s ease;max-width:80vw;
}
.toast.ok{background:#14713f}
.toast.err{background:#a51f1f}
.toast.warn{background:#9a5b06}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}

/* 分段 / 标签页 */
.tabs{display:inline-flex;gap:4px;background:#eef1f7;padding:4px;border-radius:10px}
.tab{border:0;background:transparent;padding:7px 15px;border-radius:7px;font-size:13.2px;color:var(--muted);cursor:pointer;font-weight:500}
.tab.active{background:#fff;color:var(--text);box-shadow:0 1px 3px rgba(15,23,42,.1);font-weight:600}

/* 进度条 */
.progress{height:7px;border-radius:20px;background:#eef1f7;overflow:hidden}
.progress > i{display:block;height:100%;background:var(--primary);border-radius:20px;transition:width .4s}

/* ============ 考生端 ============ */
.exam-card{padding:20px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);display:flex;flex-direction:column;gap:12px}
.exam-card h4{font-size:15.5px;font-weight:650;line-height:1.45}
.exam-meta{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:12.6px;color:var(--muted)}
.exam-meta span{display:inline-flex;align-items:center;gap:5px}
.exam-card .actions{margin-top:auto;display:flex;gap:8px;align-items:center}

/* 练习入口卡片 */
.practice-hero{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;margin-bottom:22px}
.hero-card{
  background:linear-gradient(135deg,#23306f,#3b5bfd 70%,#5f7dff);color:#fff;border-radius:16px;padding:26px 28px;
  position:relative;overflow:hidden;box-shadow:0 20px 44px -26px rgba(59,91,253,.9);
}
.hero-card h3{font-size:21px;font-weight:650;letter-spacing:-.2px}
.hero-card p{margin-top:8px;font-size:13.4px;color:rgba(255,255,255,.82);max-width:420px}
.hero-card .hero-actions{margin-top:18px;display:flex;gap:10px}
.hero-card .btn{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.28);color:#fff}
.hero-card .btn:hover{background:rgba(255,255,255,.24)}
.hero-card .btn.solid{background:#fff;color:#23306f;border-color:#fff}
.hero-card::after{content:"";position:absolute;width:260px;height:260px;border-radius:50%;background:rgba(255,255,255,.1);right:-70px;bottom:-120px}

/* 题目卡 */
.q-card{padding:24px 26px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.q-head{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.q-index{font-size:12.4px;color:var(--muted);font-weight:600}
.q-stem{font-size:15.2px;line-height:1.85;color:var(--text)}
.q-stem .blank{display:inline-block;min-width:56px;border-bottom:1px solid var(--line-2);margin:0 3px}
.opts{display:flex;flex-direction:column;gap:9px;margin-top:18px}
.opt{
  display:flex;gap:12px;align-items:flex-start;padding:12px 15px;border:1px solid var(--line);
  border-radius:11px;cursor:pointer;transition:.15s;background:#fff;
}
.opt:hover{border-color:#c3cee3;background:#fbfcff}
.opt.selected{border-color:var(--primary);background:var(--primary-weak);box-shadow:0 0 0 1px var(--primary) inset}
.opt.correct{border-color:var(--green);background:var(--green-weak)}
.opt.wrong{border-color:var(--red);background:var(--red-weak)}
.opt .k{
  width:23px;height:23px;flex:none;border-radius:50%;border:1px solid var(--line-2);
  display:flex;align-items:center;justify-content:center;font-size:12.4px;font-weight:600;color:var(--muted);background:#fff;
}
.opt.selected .k{background:var(--primary);border-color:var(--primary);color:#fff}
.opt.correct .k{background:var(--green);border-color:var(--green);color:#fff}
.opt.wrong .k{background:var(--red);border-color:var(--red);color:#fff}
.opt .t{font-size:14px;line-height:1.6;padding-top:1px}
.fill-inputs{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.fill-line{display:flex;align-items:center;gap:10px}
.fill-line label{font-size:12.6px;color:var(--muted);flex:none;width:48px}
.explain{margin-top:18px;padding:15px 17px;background:var(--surface-2);border:1px dashed var(--line-2);border-radius:11px;font-size:13.2px;line-height:1.8;color:#334155}
.explain b{color:var(--text)}
.explain .ans-line{color:var(--green);font-weight:600}
.explain .ans-line.bad{color:var(--red)}
.ans-block{margin-top:16px;padding:14px 16px;border-radius:11px;background:#fbfcff;border:1px solid var(--line);font-size:13.4px;line-height:1.8}
.ans-block .lab{font-size:12px;color:var(--muted);margin-bottom:4px}

/* 考试布局 */
.exam-top{display:flex;align-items:center;gap:16px;padding:13px 20px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);margin-bottom:16px;position:sticky;top:74px;z-index:30}
.exam-top h3{font-size:15px;font-weight:650;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.timer{font-variant-numeric:tabular-nums;font-size:16px;font-weight:650;color:var(--primary);background:var(--primary-weak);border:1px solid #dbe3ff;padding:3px 13px;border-radius:8px;letter-spacing:.4px}
.timer.warn{color:var(--red);background:var(--red-weak);border-color:#f6d3d3;animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.62}}
.exam-layout{display:grid;grid-template-columns:1fr 236px;gap:16px;align-items:start}
.sheet{padding:16px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);position:sticky;top:150px}
.sheet h4{font-size:13.4px;font-weight:600;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.sheet h4 span{margin-left:auto;font-size:12px;color:var(--muted);font-weight:400}
.sheet-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}
.sheet-cell{
  aspect-ratio:1;border:1px solid var(--line-2);border-radius:7px;background:#fff;font-size:12.4px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--muted);transition:.15s;font-variant-numeric:tabular-nums;
}
.sheet-cell:hover{border-color:var(--primary);color:var(--primary)}
.sheet-cell.done{background:var(--primary-weak);border-color:#c9d4ff;color:var(--primary-dark);font-weight:600}
.sheet-cell.cur{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}
.sheet-legend{display:flex;gap:14px;margin-top:14px;font-size:11.6px;color:var(--muted-2);flex-wrap:wrap}
.sheet-legend i{display:inline-block;width:10px;height:10px;border-radius:3px;border:1px solid var(--line-2);margin-right:5px;vertical-align:-1px}
.sheet-legend i.done{background:var(--primary-weak);border-color:#c9d4ff}
.sheet-legend i.cur{background:var(--primary);border-color:var(--primary)}
.exam-nav{display:flex;gap:10px;align-items:center;margin-top:16px;flex-wrap:wrap}
.exam-nav .spacer{flex:1}
.exam-progress{font-size:12.6px;color:var(--muted);margin-top:16px;display:flex;align-items:center;gap:10px}
.exam-progress .progress{flex:1}

/* 答卷回顾 */
.review-q{padding:20px 22px;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;background:#fff}
.review-q.right{border-left:3px solid var(--green)}
.review-q.wrong{border-left:3px solid var(--red)}
.review-q.pending{border-left:3px solid var(--amber)}
.review-score{margin-left:auto;font-size:13px;font-weight:600}

/* 分数环 */
.score-hero{display:flex;gap:24px;align-items:center;padding:22px 26px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);margin-bottom:18px;flex-wrap:wrap}
.score-ring{width:104px;height:104px;border-radius:50%;flex:none;display:flex;flex-direction:column;align-items:center;justify-content:center;background:conic-gradient(var(--primary) var(--p,60%),#eef1f7 0);position:relative}
.score-ring::after{content:"";position:absolute;inset:9px;background:#fff;border-radius:50%}
.score-ring .val{position:relative;z-index:1;font-size:26px;font-weight:700;letter-spacing:-1px;line-height:1.1}
.score-ring .unit{position:relative;z-index:1;font-size:11.4px;color:var(--muted)}
.score-meta{flex:1;min-width:220px}
.score-meta h3{font-size:17px;font-weight:650;margin-bottom:6px}
.score-meta .kv{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:13px;color:var(--muted);margin-top:10px}
.score-meta .kv b{color:var(--text);font-weight:600}

/* 图表 */
.bars{display:flex;align-items:flex-end;gap:14px;height:190px;padding:8px 4px 0}
.bar-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:8px;height:100%;justify-content:flex-end}
.bar-col .bar{width:100%;max-width:64px;background:linear-gradient(180deg,#6b87ff,#3b5bfd);border-radius:7px 7px 3px 3px;min-height:3px;transition:height .5s ease}
.bar-col .bar-lbl{font-size:11.8px;color:var(--muted);white-space:nowrap}
.bar-col .bar-val{font-size:12px;font-weight:600;font-variant-numeric:tabular-nums}

/* 导入区 */
.import-area{display:grid;grid-template-columns:1fr;gap:14px}
.dropzone{
  border:1.5px dashed var(--line-2);border-radius:12px;padding:26px;text-align:center;background:var(--surface-2);
  transition:.16s;cursor:pointer;
}
.dropzone:hover,.dropzone.drag{border-color:var(--primary);background:var(--primary-weak)}
.dropzone .dz-title{font-size:13.8px;font-weight:600;color:var(--text)}
.dropzone .dz-sub{font-size:12.2px;color:var(--muted);margin-top:4px}
.code-area{font-family:ui-monospace,Consolas,monospace;font-size:12.4px;line-height:1.7;min-height:150px}
.import-tip{font-size:12.4px;color:var(--muted);background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:12px 14px;line-height:1.85}
.import-tip code{background:#eef1f7;padding:1px 5px;border-radius:4px;font-size:11.8px;color:#3350dc}
.import-result{margin-top:10px;font-size:12.8px}

/* 组卷编辑器 */
.pe-head{display:flex;gap:14px;align-items:flex-end;flex-wrap:wrap;padding:16px 20px;margin-bottom:16px}
.pe-head .grow{flex:1;min-width:200px}
.pe-body{display:grid;grid-template-columns:1fr 330px;gap:16px;align-items:start}
.pe-bank{display:flex;flex-direction:column;max-height:calc(100vh - 260px)}
.pe-bank-tools{display:flex;gap:8px;padding:13px 16px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.pe-bank-tools select,.pe-bank-tools input{width:auto;padding:6px 10px;font-size:12.6px}
.pe-bank-tools input[type=text]{flex:1;min-width:120px}
.pe-qlist{overflow:auto;padding:8px 10px}
.pe-qitem{display:flex;gap:11px;padding:10px 10px;border-radius:9px;cursor:pointer;align-items:flex-start;border:1px solid transparent}
.pe-qitem:hover{background:#f7f9ff}
.pe-qitem.on{background:var(--primary-weak);border-color:#dbe3ff}
.pe-qitem input{margin-top:4px;accent-color:var(--primary);width:15px;height:15px;flex:none}
.pe-qitem .info{min-width:0;flex:1}
.pe-qitem .stem{font-size:13.2px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pe-qitem .tags{margin-top:4px;display:flex;gap:6px;font-size:11.4px;color:var(--muted-2);flex-wrap:wrap}
.pe-side{position:sticky;top:74px;display:flex;flex-direction:column;max-height:calc(100vh - 100px)}
.pe-side-head{padding:14px 16px;border-bottom:1px solid var(--line);font-size:13px;display:flex;align-items:center;gap:6px}
.pe-side-head b{color:var(--primary);font-size:15px}
.pe-selected{overflow:auto;padding:8px 10px;flex:1}
.pe-sel-item{display:flex;gap:8px;align-items:flex-start;padding:8px;border-bottom:1px dashed var(--line);font-size:12.8px}
.pe-sel-item .idx{width:20px;flex:none;color:var(--muted-2);font-size:11.8px;padding-top:2px}
.pe-sel-item .stem{flex:1;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pe-sel-item input{width:52px;flex:none;padding:3px 6px;font-size:12px;text-align:center}
.pe-sel-item .rm{border:0;background:none;color:var(--muted-2);cursor:pointer;font-size:15px;line-height:1;padding:0 2px}
.pe-sel-item .rm:hover{color:var(--red)}
.pe-random{padding:12px 16px;border-top:1px solid var(--line);background:var(--surface-2);border-radius:0 0 var(--radius) var(--radius)}
.pe-random .rt{font-size:12.8px;font-weight:600;margin-bottom:8px;display:flex;align-items:center;gap:6px}
.rand-row{display:grid;grid-template-columns:1fr 52px 58px;gap:6px;align-items:center;font-size:12.2px;color:var(--muted);margin-bottom:6px}
.rand-row input{padding:4px 6px;font-size:12px;text-align:center}

/* 响应式 */
@media (max-width:1080px){
  .login-wrap{grid-template-columns:1fr}
  .login-brand{display:none}
  .pe-body{grid-template-columns:1fr}
  .pe-side{position:static;max-height:none}
  .pe-bank{max-height:none}
  .grid-2{grid-template-columns:1fr}
  .practice-hero{grid-template-columns:1fr}
}
@media (max-width:860px){
  .sidebar{position:fixed;left:0;top:0;bottom:0;transform:translateX(-100%);transition:transform .22s ease}
  .sidebar.open{transform:none}
  .sidebar-mask{display:none;position:fixed;inset:0;background:rgba(15,23,42,.4);z-index:50}
  .sidebar-mask.show{display:block}
  .icon-btn{display:inline-flex}
  .page{padding:16px}
  .topbar{padding:0 16px;gap:10px}
  .exam-layout{grid-template-columns:1fr}
  .sheet{position:static}
  .sheet-grid{grid-template-columns:repeat(8,1fr)}
  .form-row,.form-row-3{grid-template-columns:1fr}
  .login-panel{padding:24px}
  .q-card{padding:18px}
  .exam-top{top:70px}
}