/* 测评答题页 */
body{background:#f2f4f7}
body.lock{overflow:hidden}   /* 只有答题页锁定滚动 */

/* 须知页正文（notice） */
.qcard ul{margin:0 0 18px;padding-left:20px}
.qcard li{font-size:14.5px;line-height:1.95;color:#5a6577;margin-bottom:2px}
.qcard li strong{color:#06b795}
.btn-main{
  display:block;width:100%;height:50px;border:0;border-radius:12px;
  background:#06b795;color:#fff;font-size:16.5px;font-weight:600;
  cursor:pointer;font-family:inherit;
}
.btn-main:disabled{background:#c3ccd9;cursor:not-allowed}

/* 答题页底部已答统计 */
.underbar{
  display:flex;justify-content:space-between;align-items:center;
  margin-top:12px;padding:0 4px;font-size:13px;color:#5a6577;
}
.underbar .dim{color:#a8b0bd}

/* ---------- 顶部固定条 ---------- */
.top{
  position:fixed;top:0;left:0;right:0;z-index:50;
  background:#fff;border-bottom:1px solid #e6eaf0;
  padding:10px 14px;display:flex;align-items:center;gap:12px;
}
.top .ttl{font-size:15px;font-weight:700;flex:1;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap}
.clock{
  font-size:19px;font-weight:800;color:#06b795;
  font-variant-numeric:tabular-nums;letter-spacing:.5px;
}
.clock.warn{color:#ff8a3d}
.clock.danger{color:#e04b4b}
.top .quit{font-size:13px;color:#8a94a6;cursor:pointer}

/* ---------- 进度条 ---------- */
.prog{height:4px;background:#eef1f5}
.prog i{display:block;height:100%;background:linear-gradient(90deg,#06b795,#ff8a3d);
  transition:width .25s}

/* ---------- 答题主体 ---------- */
.body{padding:60px 16px 150px;max-width:640px;margin:0 auto}

.qcard{
  background:#fff;border-radius:14px;padding:20px 18px;
  box-shadow:0 1px 4px rgba(20,40,80,.06);
}
.qmeta{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.qno{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:30px;height:26px;padding:0 8px;border-radius:8px;
  background:#e6f9f4;color:#06b795;font-size:14px;font-weight:700;
}
.qtype{font-size:12px;padding:2px 9px;border-radius:20px;background:#fff1e6;color:#c96a1e}
.qscore{margin-left:auto;font-size:12px;color:#8a94a6}
.stem{font-size:17px;line-height:1.75;margin-bottom:18px;word-break:break-word}
.stem img{max-width:100%;border-radius:8px;margin-top:10px}

.opts{display:flex;flex-direction:column;gap:10px}
.opt{
  display:flex;gap:11px;align-items:flex-start;
  padding:14px;border:1.5px solid #e6eaf0;border-radius:12px;
  background:#fff;cursor:pointer;transition:all .13s;
}
.opt:active{background:#fafbfd}
.opt .k{
  flex:0 0 26px;height:26px;line-height:24px;text-align:center;
  border:1.5px solid #d5dbe4;border-radius:50%;
  font-size:13.5px;font-weight:700;color:#8a94a6;
}
.opt .t{flex:1;font-size:15.5px;line-height:1.6}
.opt.sel{border-color:#06b795;background:#f4f8ff}
.opt.sel .k{background:#06b795;border-color:#06b795;color:#fff}
.opt.multi .k{border-radius:7px}

/* ---------- 底部答题卡 ---------- */
.bottom{
  position:fixed;left:0;right:0;bottom:0;z-index:50;
  background:#fff;border-top:1px solid #e6eaf0;padding:10px 14px 14px;
}
.cardbox{
  display:flex;flex-wrap:wrap;gap:7px;
  max-height:88px;overflow-y:auto;margin-bottom:10px;
}
.cn{
  min-width:32px;height:32px;line-height:30px;text-align:center;
  border:1.5px solid #e6eaf0;border-radius:8px;
  font-size:13px;cursor:pointer;background:#fff;color:#5a6577;
}
.cn.done{background:#06b795;border-color:#06b795;color:#fff}
.cn.cur{border-color:#ff8a3d;background:#fff1e6;color:#c96a1e;font-weight:700}
.nav{display:flex;gap:10px}
.nav button{
  flex:1;height:46px;border:0;border-radius:11px;
  font-size:15.5px;font-weight:600;cursor:pointer;font-family:inherit;
}
.nav .prev{background:#f0f2f5;color:#5a6577}
.nav .next{background:#06b795;color:#fff}
.nav .submit{background:#ff8a3d;color:#fff}
.nav button:disabled{opacity:.45}

/* ---------- 水印 ---------- */
.wm{
  position:fixed;inset:0;z-index:40;pointer-events:none;
  opacity:.055;
}
.wm span{
  position:absolute;font-size:13px;color:#000;white-space:nowrap;
  transform:rotate(-22deg);
}

/* ---------- 弹窗 ---------- */
.mask{
  position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:80;
  display:none;align-items:center;justify-content:center;padding:18px;
}
.mask.on{display:flex}
.dlg{
  background:#fff;border-radius:15px;padding:22px 20px;width:100%;max-width:440px;
  max-height:86vh;overflow:auto;
}
.dlg h3{margin:0 0 12px;font-size:18px}
.dlg p{margin:0 0 12px;font-size:14.5px;color:#5a6577;line-height:1.75}
.dlg ul{margin:0 0 14px;padding-left:20px;font-size:14px;color:#5a6577;line-height:1.95}
.dlg .btn{
  display:block;width:100%;height:48px;border:0;border-radius:12px;
  background:#06b795;color:#fff;font-size:16px;font-weight:600;
  cursor:pointer;margin-top:9px;font-family:inherit;
}
.dlg .btn.gray{background:#f0f2f5;color:#5a6577}
.dlg .btn.orange{background:#ff8a3d}