:root{
  --bg:#f4f6fa; --card:#ffffff; --line:#e6eaf2;
  --text:#1c2333; --muted:#68738a;
  --primary:#2f6bff; --primary-soft:#eaf0ff;
  --excellent:#18a058; --excellent-bg:#e6f7ef;
  --good:#2f6bff; --good-bg:#eaf0ff;
  --pass:#e8890c; --pass-bg:#fdf3e3;
  --fail:#e5484d; --fail-bg:#fdebec;
  --radius:14px;
  --shadow:0 1px 3px rgba(28,35,51,.06),0 4px 16px rgba(28,35,51,.05);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.55}
button{font-family:inherit;cursor:pointer}
input,select{font-family:inherit;font-size:15px;color:var(--text)}

/* 顶栏 */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px 10px;max-width:860px;margin:0 auto}
.brand{display:flex;align-items:center;gap:10px}
.brand .logo{font-size:30px}
.brand h1{font-size:20px;letter-spacing:.5px}
.brand p{font-size:12px;color:var(--muted)}
.student-chip{border:1px solid var(--line);background:var(--card);border-radius:999px;padding:8px 14px;font-size:14px;display:flex;align-items:center;gap:6px;box-shadow:var(--shadow);max-width:46%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.student-chip b{color:var(--primary)}

/* 导航 */
.tabs{display:flex;gap:6px;padding:8px 12px;max-width:860px;margin:0 auto 4px;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs button{flex:0 0 auto;border:1px solid var(--line);background:var(--card);color:var(--muted);border-radius:999px;padding:8px 16px;font-size:14px;white-space:nowrap}
.tabs button.active{background:var(--primary);border-color:var(--primary);color:#fff}

main{max-width:860px;margin:0 auto;padding:8px 14px 40px}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:fade .18s ease}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1}}

/* 卡片 */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:14px}
.card-lite{background:var(--primary-soft);border-radius:12px;padding:14px}
.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.card-head h2{font-size:17px}
.hint{font-size:12.5px;color:var(--muted);margin-top:6px}

/* 表单 */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-grid.three{grid-template-columns:1fr 1fr 1fr}
@media (max-width:560px){.form-grid{grid-template-columns:1fr 1fr}.form-grid.three{grid-template-columns:1fr}}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:5px}
.field input,.field select{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 12px;background:#fbfcfe;outline:none}
.field input:focus,.field select:focus{border-color:var(--primary);background:#fff}
.field .sub{font-size:12px;color:var(--muted);margin-top:4px;display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.score-pill{font-size:12px;border-radius:999px;padding:2px 9px;font-weight:600}
.duo{display:flex;gap:8px}
.duo input{flex:1;min-width:0}
.form-actions{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.seg{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.seg button{flex:1;padding:10px 0;border:none;background:#fbfcfe;color:var(--muted)}
.seg button.active{background:var(--primary);color:#fff}

/* 按钮 */
.btn{border:none;border-radius:10px;padding:12px 20px;font-size:15px;font-weight:600}
.btn.primary{background:var(--primary);color:#fff}
.btn.primary:active{filter:brightness(.92)}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--muted)}
.btn.sm{padding:7px 14px;font-size:13.5px;border-radius:9px}
.btn.danger{background:var(--fail-bg);color:var(--fail)}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* 等级徽标 */
.grade-badge{display:inline-block;border-radius:999px;padding:3px 12px;font-size:13px;font-weight:700}
.g-优秀{background:var(--excellent-bg);color:var(--excellent)}
.g-良好{background:var(--good-bg);color:var(--good)}
.g-及格{background:var(--pass-bg);color:var(--pass)}
.g-不及格{background:var(--fail-bg);color:var(--fail)}

/* 报告 */
.report-top{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.total-num{font-size:52px;font-weight:800;line-height:1;color:var(--primary)}
.total-num small{font-size:16px;color:var(--muted);font-weight:500}
.scale{height:10px;border-radius:999px;background:linear-gradient(90deg,var(--fail-bg),var(--pass-bg) 50%,var(--good-bg) 66%,var(--excellent-bg) 75%,var(--excellent) 90%);position:relative;margin:18px 0 6px}
.scale .marker{position:absolute;top:-6px;width:4px;height:22px;background:var(--text);border-radius:2px;transform:translateX(-50%)}
.scale-labels{display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}
table.tb{width:100%;border-collapse:collapse;margin-top:8px;font-size:14px}
table.tb th,table.tb td{padding:9px 8px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
table.tb th{font-size:12.5px;color:var(--muted);font-weight:600}
table.tb tr.weak td{background:#fff8f0}
table.tb td.num{font-weight:700}
.bonus-tag{color:var(--excellent);font-weight:700;font-size:12.5px}
.advice-item{background:#f7f9fd;border-radius:12px;padding:12px 14px;margin-top:10px}
.advice-item h4{font-size:14.5px;margin-bottom:4px}
.advice-item li{margin-left:18px;font-size:13.5px;color:#3c465e}

/* 历史 */
.hist-item{display:flex;align-items:center;gap:12px;padding:12px 4px;border-bottom:1px solid var(--line)}
.hist-item:last-child{border-bottom:none}
.hist-date{font-weight:700;min-width:86px}
.hist-total{font-weight:800;color:var(--primary);font-size:18px;min-width:64px}
.hist-actions{margin-left:auto;display:flex;gap:6px}
.chart-wrap{width:100%;overflow-x:auto}
.legend{font-size:12px;color:var(--muted);margin-top:6px}

/* 学生列表 */
.stu-item{display:flex;align-items:center;gap:12px;padding:12px 4px;border-bottom:1px solid var(--line)}
.stu-item:last-child{border-bottom:none}
.avatar{width:42px;height:42px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;flex:0 0 auto}
.stu-info{flex:1;min-width:0}
.stu-info b{font-size:15px}
.stu-info p{font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stu-item.current .avatar{background:var(--excellent-bg);color:var(--excellent)}
.stu-actions{display:flex;gap:6px;flex-wrap:wrap}

/* 标准查询表 */
table.std-tb{width:100%;border-collapse:collapse;font-size:13.5px;margin-top:4px}
table.std-tb th,table.std-tb td{padding:7px 6px;border-bottom:1px solid var(--line);text-align:center}
table.std-tb th{background:#f7f9fd;font-size:12.5px;color:var(--muted)}
tr.r-优秀 td:first-child{color:var(--excellent);font-weight:700}
tr.r-良好 td:first-child{color:var(--good);font-weight:700}
tr.r-及格 td:first-child{color:var(--pass);font-weight:700}
tr.r-不及格 td:first-child{color:var(--fail);font-weight:700}

/* 抽屉 */
.drawer-mask{display:none;position:fixed;inset:0;background:rgba(20,26,40,.4);z-index:40}
.drawer-mask.show{display:block}
.drawer{position:fixed;right:0;top:0;bottom:0;width:min(360px,88vw);background:var(--card);z-index:41;transform:translateX(105%);transition:transform .22s ease;padding:18px;overflow-y:auto;box-shadow:-6px 0 24px rgba(0,0,0,.12)}
.drawer.show{transform:none}
.drawer-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}

.empty{text-align:center;color:var(--muted);padding:28px 10px;font-size:14px}
.foot{max-width:860px;margin:0 auto;padding:0 18px 30px;font-size:12px;color:var(--muted);text-align:center}

/* ================= 班级批量录入 ================= */
.tile-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.tile{border:1.5px solid var(--line);border-radius:12px;padding:12px 8px;text-align:center;background:#fbfcfe}
.tile b{display:block;font-size:14.5px}
.tile .hint{margin-top:2px}
.tile.active{background:var(--primary);border-color:var(--primary)}
.tile.active b,.tile.active .hint{color:#fff}
.step-label{font-size:13px;color:var(--muted);margin:14px 0 6px}
select.wide{width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 12px;background:#fbfcfe}
.toolbar{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.toolbar button{border:1px solid var(--line);background:var(--card);border-radius:999px;padding:6px 13px;font-size:13px;color:var(--text)}
.toolbar button.on{background:var(--primary);color:#fff;border-color:var(--primary)}
table.bt{width:100%;border-collapse:collapse;font-size:14px}
table.bt th,table.bt td{padding:10px 6px;border-bottom:1px solid var(--line);text-align:center;white-space:nowrap}
table.bt th{font-size:12.5px;color:var(--muted)}
table.bt tr.name-row{cursor:pointer}
table.bt tr.done td{color:#9aa3b5}
table.bt tr.absent td{color:#e5484d;background:#fdf5f5}
table.bt tr.cur td{background:var(--primary-soft)}
.tag{display:inline-block;border-radius:6px;padding:1px 7px;font-size:11.5px;font-weight:600}
.tag-blue{background:var(--primary-soft);color:var(--primary)}
.tag-red{background:var(--fail-bg);color:var(--fail)}
.tag-grey{background:#eef1f6;color:#8a93a8}
.batch-foot{position:sticky;bottom:0;display:flex;gap:10px;padding:10px 0 2px;background:linear-gradient(transparent,var(--bg) 30%)}
.batch-foot .btn{flex:1}
.btn.green{background:var(--excellent);color:#fff}
.btn.orange{background:#f0751c;color:#fff}

/* 键盘弹窗 */
.modal-mask{display:none;position:fixed;inset:0;background:rgba(20,26,40,.45);z-index:60}
.modal-mask.show{display:block}
.modal{display:none;position:fixed;left:50%;bottom:0;transform:translateX(-50%);width:min(430px,100vw);background:var(--card);border-radius:18px 18px 0 0;z-index:61;padding:16px 16px 20px;box-shadow:0 -8px 30px rgba(0,0,0,.18)}
.modal.show{display:block;animation:up .18s ease}
@keyframes up{from{transform:translate(-50%,30px);opacity:.5}to{transform:translate(-50%,0);opacity:1}}
.pad-title{font-size:16.5px;font-weight:700}
.pad-sub{font-size:12.5px;color:var(--muted);margin:2px 0 8px}
.pad-display{background:#f2f5fb;border-radius:12px;padding:12px;text-align:center;font-size:30px;font-weight:800;font-family:ui-monospace,Consolas,monospace;min-height:56px;letter-spacing:2px}
.pad-display .ph{color:#b7bfd0;font-size:18px;font-weight:600}
.pad-duo{display:flex;gap:8px}
.pad-duo .pad-display{flex:1}
.pad-duo .unit-lab{align-self:center;font-size:13px;color:var(--muted)}
.pad-keys{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}
.pad-keys button{border:1px solid var(--line);background:#fbfcfe;border-radius:10px;padding:13px 0;font-size:19px;font-weight:600}
.pad-keys button:active{background:var(--primary-soft)}
.pad-keys button.fn{background:#eef1f6;font-size:15px}
.pad-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:12px}
.pad-actions #padNext{grid-row:span 2;background:#3f86ff}
.pad-actions .btn{width:100%}
.btn.next{background:#3f86ff;color:#fff}

/* 秒表覆盖层 */
.sw-overlay{display:none;position:fixed;inset:0;background:var(--bg);z-index:50;flex-direction:column}
.sw-overlay.show{display:flex}
.sw-top{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;background:var(--primary);color:#fff;font-weight:600}
.sw-top .hint{color:#cdd9ff}
#swRows{flex:1;overflow-y:auto;padding:8px 10px}
.sw-area{display:flex;gap:12px;justify-content:center;padding:14px 16px;align-items:stretch}
.sw-side{width:96px;border:1.5px solid var(--excellent);color:var(--excellent);background:#fff;border-radius:14px;font-size:15px;font-weight:700;line-height:1.9}
.sw-main{flex:1;max-width:280px;border:none;border-radius:14px;background:var(--excellent);color:#fff;font-size:24px;font-weight:800}
.sw-main.stop{background:#5b6c85}
.sw-bottom{background:#101623;color:#fff;padding:12px 14px calc(12px + env(safe-area-inset-bottom))}
.sw-time{text-align:center;font-size:52px;font-weight:800;font-family:ui-monospace,Consolas,monospace;letter-spacing:2px}
.sw-time .cs{font-size:26px;color:#9fb6ff}
.sw-chips{display:flex;gap:8px;justify-content:center;margin-top:8px;flex-wrap:wrap}
.sw-chip{border:none;border-radius:8px;background:#1d2740;color:#cfe0ff;padding:7px 12px;font-size:12.5px}
.sw-chip.on{background:var(--excellent);color:#fff}
.sw-chip.warn{background:#7a2e2e;color:#ffd7d7}
#swFoot{text-align:center;color:#7f8ca8;margin-top:6px;font-size:12px}
.sw-ready{position:absolute;inset:0;background:rgba(6,10,18,.92);display:flex;align-items:center;justify-content:center;font-size:60px;font-weight:900;color:#ffc531;z-index:5}
.assign-row{display:flex;align-items:center;gap:10px;padding:9px 4px;border-bottom:1px solid var(--line);font-size:14px}
.assign-rank{width:30px;height:30px;flex:none;display:flex;align-items:center;justify-content:center;border-radius:8px;background:var(--primary);color:#fff;font-weight:700;font-size:14px}
.assign-time{font-family:ui-monospace,Consolas,monospace;font-weight:700;min-width:86px}
.assign-stu{flex:1}
/* 名次成绩列表（秒表主界面） */
.sw-laps{max-height:40vh;overflow-y:auto;padding:4px 10px}
.sw-lap-row{display:flex;align-items:center;gap:12px;padding:10px 12px;border-bottom:1px solid rgba(255,255,255,.08);cursor:pointer}
.sw-lap-row:hover{background:rgba(255,255,255,.06)}
.sw-lap-n{width:34px;height:34px;flex:none;display:flex;align-items:center;justify-content:center;border-radius:8px;background:#e8edf5;color:#1c2536;font-weight:800;font-size:15px}
.sw-lap-t{font-family:ui-monospace,Consolas,monospace;font-weight:700;font-size:16px;color:#1c2536}
.sw-lap-s{margin-left:auto;font-size:13px;color:#5a6b85}
.sw-lap-s.todo{color:#d9822b;font-weight:600}
/* 成绩分配：选择学生下拉 + 实时得分 */
.assign-head{display:flex;align-items:center;gap:10px;padding:4px;font-size:12px;color:var(--muted);font-weight:600}
.assign-head span:nth-child(2){min-width:86px}
.assign-head span:nth-child(4){width:44px;text-align:center}
.assign-pickbox{display:flex;min-width:0}
.assign-sel{flex:1;min-width:120px;padding:8px 10px;border:1.5px solid var(--line);border-radius:9px;font-size:14px;background:#fff;color:var(--text)}
.assign-sel:focus{outline:none;border-color:var(--primary)}
.assign-scorebox{width:44px;text-align:center;flex:none}
.assign-score{color:var(--primary);font-size:15px}
.assign-pick{color:var(--muted)}
.dash-tb{width:100%;border-collapse:collapse;font-size:13px;margin-top:8px}
.dash-tb th,.dash-tb td{padding:8px 6px;border-bottom:1px solid var(--line);text-align:center}

@media print{
  .topbar,.tabs,.form-actions,.hist-actions,.foot,#studentChip{display:none!important}
  body{background:#fff}
  .card{box-shadow:none;border:1px solid var(--line)}
}

/* ================= 手机端适配 ================= */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
button,select{-webkit-tap-highlight-color:transparent;touch-action:manipulation}
.drawer,.modal,.sw-overlay{overscroll-behavior:contain}

@media (max-width:560px){
  .topbar{padding:calc(10px + env(safe-area-inset-top)) 12px 6px;gap:8px}
  .brand .logo{font-size:24px}
  .brand h1{font-size:17px}
  .brand p{display:none}
  .student-chip{max-width:48%;padding:7px 11px;font-size:13px}
  .tabs{position:sticky;top:0;z-index:30;background:var(--bg);padding:6px 10px;gap:5px;box-shadow:0 4px 10px rgba(28,35,51,.06)}
  .tabs button{padding:7px 12px;font-size:13px}
  main{padding:6px 10px calc(28px + env(safe-area-inset-bottom))}
  .card{padding:14px;border-radius:12px}
  .card-head h2{font-size:16px}
  .form-grid{gap:10px}
  .field input,.field select,select.wide,textarea{font-size:16px}
  .btn{padding:12px 16px}
  .btn.sm{padding:8px 12px}
  .total-num{font-size:42px}
  .report-top{gap:12px}
  .scale{margin:14px 0 6px}
  table.tb,table.bt,table.std-tb{font-size:13px}
  table.tb th,table.tb td{padding:8px 6px}
  table.bt th,table.bt td{padding:9px 5px}
  .modal{max-height:92vh;overflow-y:auto;width:100vw;padding:14px 12px calc(14px + env(safe-area-inset-bottom))}
  .pad-keys button{padding:15px 0;font-size:20px}
  .drawer{width:92vw;padding:14px}
  .sw-time{font-size:44px}
  .sw-area{padding:10px 12px;gap:8px}
  .sw-side{width:76px;font-size:14px}
  .sw-main{font-size:22px}
  .assign-row{gap:6px;font-size:13px}
  .assign-time{min-width:74px}
  .hist-item{gap:8px}
  .hist-date{min-width:74px}
  .tile{padding:11px 6px}
}
@media (max-width:380px){
  .form-grid{grid-template-columns:1fr}
  .toolbar button{padding:6px 10px;font-size:12px}
  .sw-time{font-size:38px}
}

/* ================= 会员登录提示 ================= */
.login-gate{position:fixed;inset:0;z-index:999;background:rgba(245,247,251,.97);display:flex;align-items:center;justify-content:center;padding:24px}
.login-gate[hidden]{display:none}
.login-card{width:100%;max-width:340px;background:#fff;border-radius:16px;padding:26px 20px 22px;text-align:center;box-shadow:0 10px 30px rgba(28,35,51,.12)}
.login-logo{font-size:38px;line-height:1}
.login-card h2{margin:8px 0 10px;font-size:20px}
.login-msg{color:var(--muted,#667085);font-size:14px;line-height:1.75;margin:0 0 18px}
.login-card .btn{display:block;width:100%;margin-top:8px;text-decoration:none}