/* 实验室仪器设备使用登记系统 —— 公共样式（浅色主题 / 移动端优先） */
:root{
  --primary:#1d4ed8; --primary-dark:#1741b0; --primary-soft:#e8effd;
  --danger:#dc2626; --danger-soft:#fdeaea;
  --success:#15803d; --success-soft:#e8f6ec;
  --warn:#b45309; --warn-soft:#fdf3e3;
  --text:#1f2937; --muted:#6b7280; --line:#e3e8f0;
  --bg:#f5f7fb; --card:#ffffff; --radius:10px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
  background:var(--bg); color:var(--text); font-size:14px; line-height:1.6;
  -webkit-text-size-adjust:100%;
}
a{color:var(--primary);text-decoration:none}
h1,h2,h3,h4{margin:0 0 10px;font-weight:600}
h1{font-size:20px} h2{font-size:17px} h3{font-size:15px}
button,input,select,textarea{font-family:inherit;font-size:14px}
button{cursor:pointer}
.hide{display:none !important}

/* ---------- 布局 ---------- */
.wrap{max-width:1180px;margin:0 auto;padding:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:14px}
.card-tight{padding:12px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row.end{justify-content:flex-end}
.spacer{flex:1}
.grid{display:grid;gap:12px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}

/* ---------- 顶部条 ---------- */
.topbar{background:var(--primary);color:#fff;padding:12px 16px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.topbar h1{font-size:17px;margin:0;color:#fff}
.topbar .sub{opacity:.85;font-size:12px}
.topbar a,.topbar button{color:#fff;background:rgba(255,255,255,.16);border:0;border-radius:6px;padding:6px 12px;font-size:13px}
.topbar nav{display:flex;gap:6px;flex-wrap:wrap}
.topbar nav a{background:transparent;padding:6px 10px;border-radius:6px;opacity:.9}
.topbar nav a.active{background:rgba(255,255,255,.22);opacity:1;font-weight:600}
@media(max-width:640px){.topbar{padding:10px 10px}.topbar h1{font-size:15px}}

/* ---------- 后台：左侧菜单 ---------- */
.shell{display:flex;align-items:flex-start;gap:14px;
  max-width:1420px;margin:0 auto;padding:14px}
.side{width:180px;flex:none;position:sticky;top:14px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);padding:8px}
.side-h{font-size:12px;color:var(--muted);padding:6px 12px 8px}
.side nav{display:flex;flex-direction:column;gap:2px}
.side nav a{display:block;padding:9px 12px;border-radius:8px;color:var(--text);
  font-size:14px;border-left:3px solid transparent}
.side nav a:hover{background:#f0f4fa;color:var(--text)}
.side nav a.active{background:var(--primary-soft);color:var(--primary);
  font-weight:600;border-left-color:var(--primary)}
.shell>.wrap{flex:1;min-width:0;max-width:none;margin:0;padding:0}
@media(max-width:860px){
  .shell{flex-direction:column;gap:10px;padding:12px}
  .side{width:100%;position:static;overflow-x:auto}
  .side nav{flex-direction:row;gap:6px}
  .side nav a{white-space:nowrap;padding:8px 12px;
    border-left:0;border-bottom:3px solid transparent}
  .side nav a.active{border-left:0;border-bottom-color:var(--primary)}
  .side-h{display:none}
}

/* ---------- 表单 ---------- */
label{display:block;font-size:13px;color:var(--muted);margin:10px 0 4px}
input[type=text],input[type=number],input[type=password],input[type=datetime-local],
input[type=date],select,textarea{
  width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px;
  background:#fff;color:var(--text);outline:none;
}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
textarea{min-height:70px;resize:vertical}
.btn{
  padding:9px 16px;border:1px solid var(--primary);border-radius:8px;
  background:var(--primary);color:#fff;font-size:14px;
}
.btn:hover{background:var(--primary-dark)}
.btn.sec{background:#fff;color:var(--primary)}
.btn.gray{background:#fff;color:var(--muted);border-color:var(--line)}
.btn.danger{background:var(--danger);border-color:var(--danger)}
.btn.sm{padding:5px 10px;font-size:12.5px}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn.big{width:100%;padding:13px;font-size:16px;font-weight:600;border-radius:10px}
.seg{display:flex;gap:0;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.seg label{margin:0;flex:1;text-align:center;padding:9px 6px;cursor:pointer;color:var(--muted);font-size:13.5px}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg label.on{background:var(--primary);color:#fff;font-weight:600}
.hint{font-size:12px;color:var(--muted);margin-top:6px}
.req::after{content:"*";color:var(--danger);margin-left:3px}

/* ---------- 表格 ---------- */
.tbl-wrap{overflow:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{padding:9px 10px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
th{background:#f0f4fa;color:var(--muted);font-weight:600;position:sticky;top:0;z-index:1}
tbody tr:hover{background:#fafbfe}
td.wrap-cell{white-space:normal;min-width:180px}
.empty{padding:26px;text-align:center;color:var(--muted)}
.pager{display:flex;gap:8px;align-items:center;justify-content:flex-end;padding:10px;font-size:13px}

/* ---------- 标签 ---------- */
.tag{display:inline-block;padding:2px 8px;border-radius:20px;font-size:11.5px;line-height:1.7}
.tag.g{background:var(--success-soft);color:var(--success)}
.tag.r{background:var(--danger-soft);color:var(--danger)}
.tag.b{background:var(--primary-soft);color:var(--primary)}
.tag.y{background:var(--warn-soft);color:var(--warn)}

/* ---------- 统计卡 ---------- */
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.stat .n{font-size:24px;font-weight:700;line-height:1.2}
.stat .t{font-size:12.5px;color:var(--muted)}
.bars{display:flex;flex-direction:column;gap:8px}
.bar-row{display:grid;grid-template-columns:120px 1fr 90px;gap:8px;align-items:center;font-size:12.5px}
.bar{height:16px;background:#eef2f8;border-radius:4px;overflow:hidden}
.bar>i{display:block;height:100%;background:var(--primary);border-radius:4px}
@media(max-width:640px){.bar-row{grid-template-columns:90px 1fr 70px;font-size:11.5px}}

/* ---------- 弹窗 ---------- */
.mask{position:fixed;inset:0;background:rgba(17,24,39,.5);display:flex;align-items:center;
  justify-content:center;padding:16px;z-index:50}
.modal{background:#fff;border-radius:12px;width:100%;max-width:560px;max-height:86vh;overflow:auto;
  box-shadow:0 20px 60px rgba(0,0,0,.25)}
.modal-h{padding:14px 16px;border-bottom:1px solid var(--line);font-weight:600;display:flex;align-items:center}
.modal-b{padding:16px}
.modal-f{padding:12px 16px;border-top:1px solid var(--line);display:flex;gap:8px;justify-content:flex-end}
.close{margin-left:auto;border:0;background:transparent;font-size:22px;line-height:1;color:var(--muted);cursor:pointer}

/* ---------- 提示 ---------- */
.toast{position:fixed;left:50%;transform:translateX(-50%);top:18px;z-index:99;
  background:#111827;color:#fff;padding:10px 18px;border-radius:8px;font-size:13.5px;
  box-shadow:0 8px 24px rgba(0,0,0,.2)}
.toast.ok{background:var(--success)} .toast.err{background:var(--danger)}
.alert{padding:10px 12px;border-radius:8px;margin-bottom:12px;font-size:13px}
.alert.err{background:var(--danger-soft);color:var(--danger)}
.alert.warn{background:var(--warn-soft);color:var(--warn)}
.alert.info{background:var(--primary-soft);color:var(--primary)}

/* ---------- 登录页 ---------- */
.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}
.login-box{width:100%;max-width:380px;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:26px 24px;box-shadow:0 10px 40px rgba(15,23,42,.08)}
.login-box h1{font-size:19px;text-align:center}
.login-box .sub{text-align:center;color:var(--muted);font-size:12.5px;margin-bottom:18px}

/* ---------- 扫码 H5 ---------- */
.scan-page{max-width:520px;margin:0 auto;padding:14px}
.dev-card{background:linear-gradient(135deg,#1d4ed8,#3b82f6);color:#fff;border-radius:12px;
  padding:16px;margin-bottom:14px}
.dev-card .code{font-size:12px;opacity:.85;letter-spacing:.6px}
.dev-card .name{font-size:19px;font-weight:700;margin-top:2px}
.dev-card .meta{font-size:12.5px;opacity:.9;margin-top:6px}
.step{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);margin-bottom:10px}
.step i{width:20px;height:20px;border-radius:50%;background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-style:normal;font-size:12px}
.step.done i{background:var(--success)}
.live{background:#0f172a;color:#e2e8f0;border-radius:10px;padding:14px;text-align:center;margin-bottom:12px}
.live .big{font-size:30px;font-weight:700;letter-spacing:1px;font-variant-numeric:tabular-nums}
.live .lb{font-size:11.5px;opacity:.7}
#reader{position:relative;width:100%;aspect-ratio:1/1;background:#000;border-radius:10px;overflow:hidden}
#reader video{width:100%;height:100%;object-fit:cover}
#reader canvas{position:absolute;inset:0;width:100%;height:100%}
.scan-line{position:absolute;left:8%;right:8%;top:50%;height:2px;background:var(--primary);
  box-shadow:0 0 12px var(--primary);animation:scanmove 1.6s infinite}
@keyframes scanmove{0%{top:22%}50%{top:78%}100%{top:22%}}
.result{text-align:center;padding:10px 0}
.result .big{font-size:26px;font-weight:700;color:var(--success)}
.kv{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;
  padding:8px 2px;font-size:13px;border-bottom:1px solid var(--line)}
.kv:last-child{border-bottom:none}
.kv span{color:var(--muted);flex:none}
.kv b{font-weight:600;text-align:right;word-break:break-all}