/* ============================================================================
 * HCS 培训系统 — 样式 V9.1 (Premium Apple-Inspired Design)
 * 高端大气精装版：深蓝×金色贵族体系 · 光晕与发光 · 玻璃拟态 · 细腻光影层次
 * 硬性规范保留：中英双语行内 · A4 打印 2.54cm · 签名框 2cm×4cm · 内容保护
 * ==========================================================================*/
:root{
  /* ---- HCS 品牌色（深蓝 × 金色） ---- */
  --navy:#0a2540; --navy-soft:#16385c; --navy-deep:#061a30; --navy-mid:#0d2b52;
  --gold:#c9a227; --gold-deep:#a8861c; --gold-light:#e8c66a; --gold-bright:#f2d98f;
  /* ---- 中性色 ---- */
  --bg:#f5f5f7; --bg2:#fbfbfd;
  --panel:#ffffff; --panel-t:rgba(255,255,255,.72);
  --navy-t:rgba(8,26,46,.78);
  --line:#e6e4df; --line-soft:#f0efea;
  --txt:#23262b; --muted:#76767c;
  /* ---- 语义色 ---- */
  --ok:#1f8a4c; --warn:#b87a10; --bad:#c92a2a;
  --ok-bg:#e8f6ee; --warn-bg:#fdf3e0; --bad-bg:#fdeaea;
  /* ---- 阴影（多层柔和 + 金色光晕） ---- */
  --shadow-sm:0 1px 2px rgba(10,37,64,.05), 0 3px 10px rgba(10,37,64,.04);
  --shadow-md:0 2px 6px rgba(10,37,64,.05), 0 14px 34px rgba(10,37,64,.08);
  --shadow-lg:0 6px 18px rgba(10,37,64,.10), 0 30px 60px rgba(10,37,64,.10);
  --shadow-gold:0 8px 28px rgba(201,162,39,.20), 0 2px 8px rgba(201,162,39,.10);
  --ring:0 0 0 3px rgba(201,162,39,.22);
  /* ---- 圆角 ---- */
  --r-sm:12px; --r-md:16px; --r-lg:20px; --r-pill:980px;
  /* ---- 动效 ---- */
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0;color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.7;letter-spacing:.011em;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  font-feature-settings:"tnum" on,"lnum" on;
  -webkit-user-select:none;user-select:none;  /* 内容保护：禁止选中复制 */
  -webkit-touch-callout:none}
body{background:var(--bg)}
/* 背景光晕层：右上金辉 + 左下深海蓝 + 底部暖金（高端大气的气场来源） */
body::before{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(1100px 560px at 88% -12%, rgba(201,162,39,.16), transparent 62%),
    radial-gradient(900px 560px at -12% 24%, rgba(10,37,64,.12), transparent 58%),
    radial-gradient(760px 640px at 50% 118%, rgba(201,162,39,.10), transparent 60%);
  transition:opacity .6s var(--ease)}
input,textarea,select{-webkit-user-select:text;user-select:text;font-family:inherit}  /* 表单输入仍可正常操作 */
body.admin,body.admin *{-webkit-user-select:text!important;user-select:text!important}  /* 管理员不受复制限制 */
a{color:var(--navy);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--gold-deep)}
::selection{background:rgba(201,162,39,.30)}

/* ---- 滚动条（细圆润 + 金色 hover） ---- */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#d8d6cf;border-radius:8px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:rgba(201,162,39,.65)}

/* ================= Header（深蓝渐变 + 金线 + 光晕） ================= */
.logo{background:linear-gradient(145deg,var(--gold-light),var(--gold) 55%,var(--gold-deep));color:var(--navy);
  display:flex;align-items:center;justify-content:center;font-weight:800;
  border-radius:16px;box-shadow:0 6px 20px rgba(201,162,39,.5), inset 0 1px 0 rgba(255,255,255,.6)}
.hcs-header{position:sticky;top:0;z-index:60;overflow:hidden;
  background:linear-gradient(135deg,#081c33 0%,var(--navy-mid) 45%,var(--navy-soft) 100%);
  color:#fff;padding:14px 30px;display:flex;align-items:center;gap:16px;
  box-shadow:0 10px 30px rgba(6,26,48,.35)}
/* header 右上金色光晕 */
.hcs-header::before{content:'';position:absolute;top:-80px;right:-40px;width:420px;height:260px;
  background:radial-gradient(closest-side, rgba(201,162,39,.35), transparent 72%);
  pointer-events:none}
/* header 底部金色细线 */
.hcs-header::after{content:'';position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(201,162,39,.35) 18%,var(--gold-light) 50%,rgba(201,162,39,.35) 82%,transparent)}
.hcs-header .logo{width:44px;height:44px;font-size:18px}
.hcs-header h1{font-size:19px;margin:0;font-weight:800;letter-spacing:.3px;
  text-shadow:0 2px 8px rgba(0,0,0,.35)}
.hcs-header .sub{font-size:12.5px;margin-top:2px;color:rgba(235,242,249,.88)}
.hcs-header .ver{margin-left:auto;font-size:11.5px;opacity:.8;text-align:right;line-height:1.5;color:rgba(235,242,249,.9);z-index:1}

/* ================= Layout ================= */
.wrap{display:flex;min-height:calc(100vh - 73px)}
.sidebar{width:236px;background:var(--panel-t);-webkit-backdrop-filter:saturate(160%) blur(22px);backdrop-filter:saturate(160%) blur(22px);
  border-right:1px solid rgba(201,162,39,.16);padding:18px 14px;flex:none;
  position:sticky;top:73px;height:calc(100vh - 73px);overflow-y:auto;transition:.3s var(--ease)}
.sidebar.hidden{display:none}
.main{flex:1;padding:30px 36px;overflow:auto}
.main.full{width:100%}
.sidebar .navitem{padding:11px 15px;border-radius:var(--r-sm);cursor:pointer;font-size:14px;color:var(--txt);
  margin-bottom:6px;display:flex;align-items:center;gap:11px;border:1px solid transparent;position:relative;
  transition:background .2s var(--ease),color .2s var(--ease),transform .15s var(--ease),box-shadow .2s var(--ease)}
.sidebar .navitem:hover{background:rgba(201,162,39,.10);color:var(--navy);transform:translateX(3px)}
.sidebar .navitem:active{transform:scale(.98)}
.sidebar .navitem.active{background:linear-gradient(135deg,var(--navy),var(--navy-soft));color:#fff;font-weight:650;
  box-shadow:0 8px 22px rgba(10,37,64,.42)}
.sidebar .navitem.active::before{content:'';position:absolute;left:0;top:22%;bottom:22%;width:4px;border-radius:0 4px 4px 0;
  background:linear-gradient(180deg,var(--gold-light),var(--gold))}
.sidebar .navitem.active:hover{transform:none}
.sidebar .navitem .ic{width:22px;text-align:center;opacity:.9}
.sidebar .grp{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:1.4px;margin:18px 15px 8px;font-weight:700}

/* ================= Cards（玻璃感 + 顶部金线 + 金色光晕 hover） ================= */
.card{background:linear-gradient(180deg,#ffffff 0%,#fdfdfb 100%);
  border:1px solid rgba(201,162,39,.20);border-radius:var(--r-lg);padding:24px 28px;
  box-shadow:var(--shadow-sm);margin-bottom:22px;position:relative;overflow:hidden;
  transition:box-shadow .3s var(--ease),transform .3s var(--ease),border-color .3s var(--ease)}
.card::before{content:'';position:absolute;top:0;left:26px;right:26px;height:2px;
  background:linear-gradient(90deg,transparent,rgba(201,162,39,.55) 50%,transparent);
  opacity:.7;pointer-events:none}
.card:hover{border-color:rgba(201,162,39,.45);box-shadow:var(--shadow-gold)}
.card h2{margin:0 0 6px;color:var(--navy);font-size:22px;font-weight:800;letter-spacing:-.02em}
.card h2 .muted{font-weight:500}
.card h3{color:var(--navy-soft);font-size:16px;margin:22px 0 8px;font-weight:700}
.muted{color:var(--muted);font-size:13px}
.tag{display:inline-block;background:linear-gradient(180deg,#faf7ee,#f3ecd8);color:#8a6d10;
  border-radius:var(--r-pill);padding:3px 13px;font-size:11.5px;margin:2px 5px 2px 0;
  border:1px solid rgba(201,162,39,.35);font-weight:600}
.tag.gold{background:linear-gradient(135deg,var(--gold-light),var(--gold));color:var(--navy);border-color:transparent}

/* ================= Buttons（渐变 + 高光 + 发光） ================= */
.btn{background:linear-gradient(145deg,var(--navy-mid),var(--navy) 55%,var(--navy-deep));color:#fff;border:none;
  padding:11px 22px;border-radius:var(--r-pill);cursor:pointer;
  font-size:13.5px;font-weight:650;letter-spacing:.015em;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.16), 0 5px 16px rgba(10,37,64,.35);
  transition:transform .16s var(--ease),box-shadow .25s var(--ease),filter .25s var(--ease)}
.btn:hover{filter:brightness(1.12);box-shadow:inset 0 1px 0 rgba(255,255,255,.2), 0 9px 26px rgba(10,37,64,.42);transform:translateY(-1px)}
.btn:active{transform:scale(.96);box-shadow:inset 0 2px 6px rgba(0,0,0,.25)}
.btn.gold{background:linear-gradient(145deg,var(--gold-light),var(--gold) 50%,var(--gold-deep));color:var(--navy);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.6), 0 5px 18px rgba(201,162,39,.45)}
.btn.gold:hover{box-shadow:inset 0 1px 0 rgba(255,255,255,.65), 0 10px 30px rgba(201,162,39,.55)}
.btn.ghost{background:rgba(255,255,255,.92);color:var(--navy);border:1px solid rgba(10,37,64,.35);box-shadow:none}
.btn.ghost:hover{box-shadow:var(--shadow-sm);filter:none;background:#fff}
.btn.sm{padding:7px 15px;font-size:12.5px}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;filter:grayscale(.35)}

/* ================= Tables（深蓝渐变表头 + 金色悬停） ================= */
table{width:100%;border-collapse:collapse;font-size:13.5px;margin-top:12px;background:var(--panel);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-sm)}
th,td{border:none;border-bottom:1px solid var(--line-soft);padding:11px 14px;text-align:left;vertical-align:top}
th{background:linear-gradient(135deg,var(--navy),var(--navy-soft));color:#fff;font-weight:650;
  font-size:12.5px;letter-spacing:.04em;text-shadow:0 1px 2px rgba(0,0,0,.2)}
tbody tr{transition:background .18s var(--ease)}
tbody tr:hover td{background:rgba(201,162,39,.06)}
tr:nth-child(even) td{background:rgba(248,246,240,.5)}
tr:last-child td{border-bottom:none}
.pill{padding:3px 11px;border-radius:var(--r-pill);font-size:11.5px;font-weight:650;display:inline-block}
.pill.ok{background:var(--ok-bg);color:var(--ok);border:1px solid rgba(31,138,76,.2)}
.pill.warn{background:var(--warn-bg);color:var(--warn);border:1px solid rgba(184,122,16,.2)}
.pill.bad{background:var(--bad-bg);color:var(--bad);border:1px solid rgba(201,42,42,.2)}
.pill.gray{background:#f0f0f2;color:var(--muted)}

/* ================= Course lesson ================= */
.lesson{border-left:3px solid var(--gold);padding:6px 0 6px 18px;margin:14px 0;
  border-radius:0 10px 10px 0;transition:background .22s var(--ease)}
.lesson:hover{background:rgba(201,162,39,.06)}
.lesson h4{margin:0 0 4px;color:var(--navy);font-size:15px}
.lesson p{margin:4px 0;font-size:13.8px;color:#3d3d42}
.clause-box{background:linear-gradient(135deg,#f8f6ee,#f2edd9);border:1px solid rgba(201,162,39,.30);
  border-radius:var(--r-sm);padding:11px 15px;font-size:12.5px;color:var(--navy-soft);margin-top:12px}

/* ================= Quiz / Exam ================= */
.qcard{background:linear-gradient(180deg,#ffffff,#fdfdfb);border:1px solid rgba(201,162,39,.16);
  border-radius:var(--r-lg);padding:22px 24px;margin-bottom:20px;box-shadow:var(--shadow-sm);
  transition:box-shadow .3s var(--ease),transform .3s var(--ease),border-color .3s var(--ease)}
.qcard:hover{border-color:rgba(201,162,39,.4);box-shadow:var(--shadow-md)}
.qcard .qhead{display:flex;gap:10px;align-items:center;margin-bottom:13px}
.qcard .qid{background:linear-gradient(145deg,var(--gold-light),var(--gold) 60%,var(--gold-deep));color:var(--navy);
  font-weight:800;border-radius:9px;padding:2px 10px;font-size:12px;
  box-shadow:0 3px 10px rgba(201,162,39,.4)}
.qcard .qtxt{font-size:14.5px;font-weight:650;color:var(--navy)}
.opt{display:block;padding:12px 15px;border:1px solid var(--line);border-radius:var(--r-sm);margin:9px 0;
  cursor:pointer;font-size:13.8px;background:#fff;
  transition:border-color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),transform .12s var(--ease)}
.opt:hover{border-color:rgba(201,162,39,.55);background:rgba(201,162,39,.05);box-shadow:var(--shadow-sm)}
.opt:active{transform:scale(.994)}
.opt.sel{border-color:var(--navy);background:rgba(10,37,64,.17);box-shadow:0 0 0 3px rgba(10,37,64,.16);color:var(--navy);font-weight:700}
.opt.correct{border-color:var(--ok);background:var(--ok-bg)}
.opt.wrong{border-color:var(--bad);background:var(--bad-bg)}
.opt .mk{font-weight:800;margin-right:9px;color:var(--navy)}
.opt.correct .mk{color:var(--ok)}
.opt.wrong .mk{color:var(--bad)}
.explain{background:linear-gradient(135deg,#f9f7ef,#f2edd9);border-radius:var(--r-sm);padding:13px 15px;
  margin-top:13px;font-size:13px;color:var(--navy-soft);display:none;border-left:3px solid var(--gold);
  box-shadow:inset 0 1px 3px rgba(201,162,39,.08)}
.explain.show{display:block;animation:fadeUp .32s var(--ease)}
.explain b{color:var(--navy)}

/* ================= Progress / meter ================= */
.meter{height:9px;background:#ebe9e2;border-radius:var(--r-pill);overflow:hidden;margin-top:9px;
  box-shadow:inset 0 1px 2px rgba(0,0,0,.08)}
.meter > i{display:block;height:100%;background:linear-gradient(90deg,var(--navy),var(--gold));
  border-radius:var(--r-pill);transition:width .6s var(--ease);box-shadow:0 0 8px rgba(201,162,39,.5)}

/* ================= Forms ================= */
label{display:block;font-size:12.5px;color:var(--muted);margin:13px 0 5px;font-weight:650;letter-spacing:.03em}
input,select,textarea{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:var(--r-sm);
  font-size:13.5px;background:#fff;color:var(--txt);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease)}
input:focus,select:focus,textarea:focus{outline:none;border-color:rgba(201,162,39,.7);box-shadow:var(--ring)}
input:hover,select:hover,textarea:hover{border-color:#cfccc2}
textarea{resize:vertical;min-height:74px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px 20px}

/* ================= Signature box（硬性 2cm×4cm） ================= */
.sigbox{width:4cm;height:2cm;border:1.5px solid var(--navy);border-radius:12px;display:flex;
  align-items:flex-end;justify-content:center;color:var(--muted);font-size:11px;padding-bottom:5px;
  background:#fff;position:relative;box-shadow:inset 0 1px 5px rgba(10,37,64,.07)}
.sigbox .ph{opacity:.55}
.sigbox.filled{color:var(--navy);font-weight:700;font-size:14px}

/* ================= Dashboard KPI（豪华统计卡） ================= */
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:22px}
.kpi{background:linear-gradient(160deg,#ffffff 15%,#fbf6e8 100%);border:1px solid rgba(201,162,39,.28);
  border-radius:22px;padding:20px 14px;text-align:center;position:relative;overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform .25s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease)}
.kpi::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,transparent,rgba(201,162,39,.7),transparent)}
.kpi::after{content:'';position:absolute;top:-46px;right:-30px;width:140px;height:110px;
  background:radial-gradient(closest-side,rgba(201,162,39,.20),transparent 70%)}
.kpi:hover{transform:translateY(-5px);border-color:rgba(201,162,39,.6);box-shadow:var(--shadow-gold)}
.kpi .n{font-size:35px;font-weight:800;letter-spacing:-.03em;position:relative;
  background:linear-gradient(135deg,var(--navy) 25%,var(--gold-deep) 85%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  filter:drop-shadow(0 2px 4px rgba(201,162,39,.25))}
.kpi .l{font-size:12px;color:var(--muted);margin-top:4px;font-weight:550}

/* ================= Category grid ================= */
.catgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(228px,1fr));gap:16px;margin-top:12px}
.cstat{background:linear-gradient(165deg,#ffffff,#fdfdfb);border:1px solid rgba(201,162,39,.18);
  border-radius:var(--r-md);padding:15px 17px;box-shadow:var(--shadow-sm);position:relative;
  transition:transform .25s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease)}
.cstat:hover{transform:translateY(-4px);border-color:rgba(201,162,39,.55);box-shadow:var(--shadow-gold)}
.cstat.pri{border-left:4px solid var(--gold)}
.cstat .cn{font-weight:750;color:var(--navy);font-size:14px}
.cstat .cm{font-size:11.5px;color:var(--muted);margin:3px 0 5px}
.cstat .cq{font-size:13px;color:var(--navy-soft);font-weight:650}

/* ================= 入场动效 ================= */
@keyframes fadeUp{from{opacity:0;transform:translateY(16px) scale(.996)}to{opacity:1;transform:none}}
.main .card,.main .qcard,.main .kpis,.main .catgrid{animation:fadeUp .42s var(--ease)}

/* ================= Print（A4 2.54cm / 溢出页统一边距） ================= */
@media print{
  @page{margin:2.54cm}
  body{background:#fff;font-size:12px}
  body::before{display:none}
  .sidebar,.hcs-header,.no-print{display:none!important}
  .wrap{display:block;min-height:0}
  .main{padding:0;overflow:visible}
  .card,.qcard,.cert{box-shadow:none;border-radius:4px;break-inside:avoid;animation:none;overflow:visible}
  .card::before,.kpi::before,.kpi::after{display:none}
  .sigbox{break-inside:avoid}
  th{background:var(--navy);color:#fff;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .kpi .n{background:none;-webkit-text-fill-color:var(--navy);filter:none}
}

/* ================= Authorization certificate（金框高光证书） ================= */
.cert{background:linear-gradient(180deg,#ffffff,#fdfcf8);border:1.5px solid rgba(201,162,39,.65);
  border-radius:18px;padding:30px 34px;margin-bottom:22px;position:relative;overflow:hidden;
  box-shadow:var(--shadow-gold)}
.cert::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--gold-deep),var(--gold-light) 50%,var(--gold-deep));
  box-shadow:0 2px 10px rgba(201,162,39,.5)}
.cert::after{content:'';position:absolute;top:-70px;right:-50px;width:320px;height:220px;
  background:radial-gradient(closest-side,rgba(201,162,39,.18),transparent 70%);pointer-events:none}
.cert-head{display:flex;align-items:center;gap:15px;border-bottom:1.5px solid rgba(201,162,39,.4);padding-bottom:15px}
.cert-title{font-size:24px;font-weight:800;color:var(--navy);letter-spacing:-.01em}
.cert-sub{font-size:12px;color:var(--muted);letter-spacing:.7px}
.cert-no{margin:15px 0;font-size:13px;color:var(--navy-soft);font-weight:650}
.cert h4{color:var(--navy);font-size:14.5px;margin:20px 0 8px;border-left:3px solid var(--gold);padding-left:11px}
.cert p{font-size:13.5px;line-height:1.8;margin:7px 0}
.cert-tbl{margin-top:8px}
.cert-sign{display:flex;align-items:flex-end;gap:38px;margin-top:18px;flex-wrap:wrap}
.cert-seal{position:relative;display:flex;align-items:center;justify-content:center}
.cert-foot{margin-top:22px;padding-top:13px;border-top:1px dashed rgba(201,162,39,.5);font-size:11.5px;color:var(--muted);text-align:center}
.cert .sigbox{width:4cm;height:2cm}
.cert .sigbox img{max-width:100%;max-height:1.7cm;object-fit:contain}

/* ================= Toast（毛玻璃浮层） ================= */
.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(10px);
  background:linear-gradient(135deg,rgba(20,22,26,.92),rgba(10,37,64,.92));
  -webkit-backdrop-filter:blur(22px) saturate(160%);backdrop-filter:blur(22px) saturate(160%);
  color:#fff;padding:13px 26px;border-radius:var(--r-pill);font-size:13.5px;font-weight:550;
  box-shadow:0 12px 40px rgba(0,0,0,.35), 0 0 0 1px rgba(201,162,39,.4);
  opacity:0;transition:.3s var(--ease);z-index:99;pointer-events:none;max-width:84vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== 移动端自适应 Mobile responsive（HCS 培训系统 2026-08-24） ===== */
html{-webkit-text-size-adjust:100%}
@media (max-width:900px){
  .wrap{flex-direction:column}
  .sidebar{width:100%;flex-direction:row;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;padding:8px;border-right:none;border-bottom:1px solid rgba(201,162,39,.16)}
  .sidebar .navitem{flex:none;white-space:nowrap;padding:9px 12px;font-size:13px}
  .sidebar .grp{display:none}
  .main{padding:16px}
  .hcs-header{padding:10px 16px}
  .hcs-header .sub{display:none}
}
@media (max-width:720px){
  body{font-size:14px}
  .hcs-header h1{font-size:18px;line-height:1.25}
  .hcs-header .logo{width:36px;height:36px;font-size:15px}
  .main{padding:10px 8px}
  .card{padding:14px 12px}
  h2{font-size:19px}
  h3{font-size:16px}
  .grid2{grid-template-columns:1fr}
  .kpis{grid-template-columns:repeat(2,1fr);gap:10px}
  .kpi .n{font-size:22px}
  .catgrid{grid-template-columns:1fr}
  /* 表格横向滚动，避免撑破小屏 */
  table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;white-space:nowrap}
  .opt{padding:11px 12px;font-size:14px}
  .btn{min-height:40px}
  .btn.sm{min-height:34px;padding:6px 10px;font-size:12.5px}
  .sigbox{width:100%;max-width:240px}
  .clause-box{padding:10px 12px;font-size:13px}
  .qcard .qhead{flex-wrap:wrap}
  .explain{font-size:12.5px}
  .toast{left:12px;right:12px}
  input,select,textarea{font-size:16px}
  .kpi .l{font-size:11px}
}

/* ===== 答题对错醒目显示（2026-08-24：答错红色、答对绿色，一眼可辨） ===== */
.opt{position:relative}
.opt.correct{background:#d9f2e2;border:2px solid var(--ok);color:#0f6b37;box-shadow:0 0 0 3px rgba(31,138,76,.14)}
.opt.correct .mk{color:var(--ok)}
.opt.correct::after{content:'✓';position:absolute;right:14px;top:50%;transform:translateY(-50%);font-size:22px;font-weight:900;color:var(--ok)}
.opt.wrong{background:var(--bad);border:2px solid var(--bad);color:#fff;box-shadow:0 0 0 3px rgba(201,42,42,.20)}
.opt.wrong .mk{color:#ffd9d9}
.opt.wrong::after{content:'✗';position:absolute;right:14px;top:50%;transform:translateY(-50%);font-size:22px;font-weight:900;color:#fff}
.qcard.checked .opt:not(.correct):not(.wrong){opacity:.42}
.qcard.checked .opt:not(.correct):not(.wrong) .mk{opacity:.6}