/* ============================================================
   认知健康调查 · 手机端 H5
   视觉对齐微信小程序：顶部导航 / 卡片流 / 底部操作栏 / 大点击区

   字号说明（受试者多为 60 岁以上老人，整体放大）：
   正文 17px 起，题干 18.5px，选项 17px，按钮 17.5px，
   最小辅助文字不低于 13px。
   ============================================================ */
:root{
  /* 主色 */
  --p:#2f5cc4;
  --p2:#3f74d8;
  --pl:#eef3fe;          /* 主色浅底 */
  --pd:#1f3b63;          /* 深蓝 */
  --bg:#f2f5fa;
  --card:#fff;
  --txt:#26303f;
  --txt2:#48556b;
  --muted:#7d8798;
  --line:#e8ecf3;

  --ok:#1f9d68;
  --warn:#e08c2c;
  --red:#d24545;

  /* 字号阶梯 */
  --fs-xxs:13px;         /* 极小辅助 */
  --fs-xs:14px;          /* 辅助说明 */
  --fs-sm:15.5px;        /* 次要正文 */
  --fs-md:17px;          /* 正文/选项/输入 */
  --fs-lg:18px;          /* 小标题 */
  --fs-q:18.5px;         /* 题干 */
  --fs-xl:20px;          /* 区块标题 */
  --fs-hero:27px;        /* 首页主标题 */

  --r:18px;
  --r-sm:14px;
  --nav-h:58px;
  --safe:env(safe-area-inset-bottom,0px);
  --shadow:0 1px 2px rgba(31,59,99,.04),0 10px 28px -18px rgba(31,59,99,.28);
  --shadow-lift:0 2px 6px rgba(31,59,99,.06),0 16px 32px -20px rgba(31,59,99,.32);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--txt);font-size:var(--fs-md);line-height:1.65;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
button{font-family:inherit}
a{color:var(--p);text-decoration:none}
.app{min-height:100vh;display:flex;flex-direction:column;max-width:640px;margin:0 auto;position:relative;background:var(--bg)}
.view{flex:1;padding:16px 16px 32px}
.view.flat{padding:0}
.view.with-tab{padding-bottom:calc(88px + var(--safe))}
.view.with-bar{padding-bottom:calc(96px + var(--safe))}

/* ---------------- 顶部导航 ---------------- */
.nav{
  position:sticky;top:0;z-index:50;
  height:calc(var(--nav-h) + env(safe-area-inset-top,0px));
  padding:env(safe-area-inset-top,0px) 10px 0;
  display:flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(16px);
  -webkit-backdrop-filter:saturate(180%) blur(16px);
  border-bottom:1px solid rgba(31,59,99,.06);
}
.nav-title{flex:1;text-align:center;font-size:var(--fs-lg);font-weight:600;color:var(--pd);letter-spacing:.3px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-back,.nav-ph{width:44px;height:44px;flex:0 0 44px}
.nav-back{border:0;background:transparent;padding:0;display:flex;align-items:center;justify-content:center;color:var(--pd)}
.nav-back svg{width:24px;height:24px}
.nav-back:active{opacity:.5}
.nav-right{width:44px;flex:0 0 44px;display:flex;justify-content:flex-end;font-size:var(--fs-sm);color:var(--p)}

/* ---------------- 首页 ---------------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  padding:calc(env(safe-area-inset-top,0px) + 28px) 22px 70px;
  background:linear-gradient(158deg,#172c4d 0%,#23446e 44%,#2f5cc4 132%);
  border-radius:0 0 30px 30px;
}
.hero::after{content:"";position:absolute;right:-60px;top:-70px;width:230px;height:230px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.24),rgba(255,255,255,0) 68%)}
.hero::before{content:"";position:absolute;left:-40px;bottom:-80px;width:190px;height:190px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.11),rgba(255,255,255,0) 70%)}
.hero-top{display:flex;align-items:center;gap:8px;font-size:var(--fs-sm);color:#c9daf5;letter-spacing:.5px;
  position:relative;z-index:1}
.hero-top .ver{margin-left:auto;font-size:var(--fs-xxs);padding:4px 11px;border-radius:20px;
  background:rgba(255,255,255,.16);color:#fff}
.hero h1{margin:16px 0 8px;font-size:var(--fs-hero);font-weight:600;line-height:1.32;letter-spacing:.5px;
  position:relative;z-index:1}
.hero h1 b{font-weight:700}
.hero p{margin:0;font-size:var(--fs-sm);color:#c8dbf7;position:relative;z-index:1;line-height:1.7}
.hero-code{position:relative;z-index:1;margin-top:18px;display:inline-flex;align-items:center;gap:8px;
  font-size:var(--fs-xs);color:#e6f0ff;background:rgba(255,255,255,.13);padding:8px 15px;border-radius:22px;
  border:1px solid rgba(255,255,255,.16);letter-spacing:.6px}
.home-body{padding:0 16px calc(96px + var(--safe));margin-top:-50px;position:relative;z-index:2}
.card{background:var(--card);border-radius:var(--r);padding:20px;box-shadow:var(--shadow);margin-bottom:16px}
.card.tight{padding:16px 18px}
.card h2{margin:0 0 14px;font-size:var(--fs-lg);color:var(--pd);font-weight:600;display:flex;align-items:center;gap:9px}
.card h2::before{content:"";width:4px;height:17px;border-radius:3px;background:linear-gradient(180deg,var(--p2),var(--p))}
.card h2 .more{margin-left:auto;font-size:var(--fs-xs);font-weight:400;color:var(--muted)}

/* 进度卡 */
.pcard{display:flex;align-items:center;gap:16px}
.ring{--pct:0;width:66px;height:66px;flex:0 0 66px;border-radius:50%;position:relative;
  background:conic-gradient(var(--p) calc(var(--pct) * 1%),#e6ecf6 0);
  box-shadow:0 4px 12px -6px rgba(47,92,196,.5)}
.ring::after{content:"";position:absolute;inset:6px;background:#fff;border-radius:50%}
.ring b{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:var(--fs-sm);
  font-weight:700;color:var(--pd);z-index:1;font-variant-numeric:tabular-nums}
.pcard .info{flex:1;min-width:0}
.pcard .info b{display:block;font-size:var(--fs-lg);color:var(--pd);font-weight:600;line-height:1.4}
.pcard .info span{font-size:var(--fs-xs);color:var(--muted);display:block;margin-top:5px;line-height:1.5}
.pcard .go{flex:0 0 auto;height:46px;padding:0 20px;border:0;border-radius:12px;font-size:var(--fs-sm);font-weight:600;
  color:#fff;background:linear-gradient(135deg,var(--p),var(--p2));box-shadow:0 8px 16px -8px rgba(47,92,196,.85)}
.pcard .go:active{transform:scale(.97)}
.pcard .go.done{background:#e8f7f0;color:var(--ok);box-shadow:none}

/* 快捷入口 */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:16px}
.qk{background:#fff;border-radius:var(--r-sm);padding:17px 16px;box-shadow:var(--shadow);border:0;text-align:left;
  display:flex;flex-direction:column;gap:9px;position:relative;overflow:hidden;transition:transform .12s}
.qk:active{transform:scale(.985)}
.qk .ic{width:42px;height:42px;border-radius:13px;display:flex;align-items:center;justify-content:center;font-size:20px}
.qk b{font-size:var(--fs-md);color:var(--txt);font-weight:600;line-height:1.4}
.qk span{font-size:var(--fs-xxs);color:var(--muted);line-height:1.5}
.qk .badge{position:absolute;right:11px;top:11px;font-size:var(--fs-xxs);padding:3px 9px;border-radius:20px;
  background:var(--pl);color:var(--p);font-weight:500}
.ic.blue{background:#e8f0fe;color:#2f5cc4}
.ic.green{background:#e5f7ef;color:#1f9d68}
.ic.orange{background:#fdf0e0;color:#e08c2c}
.ic.purple{background:#f0ebfd;color:#7c5cf0}

/* 列表行 */
.rows{background:#fff;border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden;margin-bottom:16px}
.row{display:flex;align-items:center;gap:14px;padding:16px 18px;border-bottom:1px solid var(--line);background:#fff}
.row:last-child{border-bottom:0}
.row:active{background:#f6f9fe}
.row .ic{width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  font-size:17px;flex:0 0 38px;font-weight:600}
.row .tx{flex:1;min-width:0}
.row .tx b{display:block;font-size:var(--fs-md);font-weight:500;color:var(--txt);line-height:1.45}
.row .tx span{display:block;font-size:var(--fs-xs);color:var(--muted);margin-top:3px;line-height:1.5}
.row .val{font-size:var(--fs-sm);color:var(--muted);white-space:nowrap}
.row .arw{color:#c3cbd9;font-size:19px}
.chip{display:inline-block;font-size:var(--fs-xxs);padding:4px 11px;border-radius:20px;font-weight:500;line-height:1.4}
.chip.blue{background:#e9f0fd;color:var(--p)}
.chip.green{background:#e5f7ef;color:var(--ok)}
.chip.orange{background:#fdf1e2;color:var(--warn)}
.chip.gray{background:#eff1f6;color:#788499}

/* 提示条 */
.note{display:flex;gap:11px;padding:14px 16px;border-radius:13px;background:#eff5ff;color:#3c5279;
  font-size:var(--fs-sm);line-height:1.75;margin-bottom:16px}
.note.warn{background:#fff7ea;color:#85560f}
.note .i{flex:0 0 auto;font-size:16px;line-height:1.4}

/* ---------------- 按钮 ---------------- */
.btn{height:56px;padding:0 22px;border:0;border-radius:14px;font-size:var(--fs-md);font-weight:600;color:#fff;
  background:linear-gradient(135deg,var(--p),var(--p2));box-shadow:0 10px 22px -12px rgba(47,92,196,.95);
  display:inline-flex;align-items:center;justify-content:center;gap:7px;transition:transform .12s,opacity .12s;
  letter-spacing:.3px}
.btn:active{transform:scale(.985)}
.btn[disabled],.btn.disabled{opacity:.5;box-shadow:none}
.btn.ghost{background:#eceff5;color:var(--txt2);box-shadow:none}
.btn.line{background:#fff;color:var(--p);border:1.5px solid #ccdcf8;box-shadow:none}
.btn.block{display:flex;width:100%}
.btn.sm{height:44px;font-size:var(--fs-sm);border-radius:11px;padding:0 16px}
.btn.danger{background:#fdeaea;color:var(--red);box-shadow:none}

/* 底部操作栏 */
.actionbar{position:fixed;left:0;right:0;bottom:0;z-index:60;display:flex;gap:12px;
  padding:12px 16px calc(12px + var(--safe));
  background:rgba(255,255,255,.97);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-top:1px solid var(--line);max-width:640px;margin:0 auto;
  box-shadow:0 -8px 24px -18px rgba(31,59,99,.4)}
.actionbar .btn{flex:1}
.actionbar .btn.ghost{flex:0 0 108px}

/* ---------------- 底部 tab ---------------- */
.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:60;display:flex;max-width:640px;margin:0 auto;
  background:rgba(255,255,255,.98);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-top:1px solid var(--line);padding:7px 0 calc(7px + var(--safe))}
.tabbar button{flex:1;background:none;border:0;display:flex;flex-direction:column;align-items:center;gap:3px;
  font-size:var(--fs-xxs);color:#939dae;padding:4px 0;transition:color .15s}
.tabbar button.on{color:var(--p);font-weight:600}
.tabbar svg{width:26px;height:26px;stroke-width:1.7}

/* ---------------- 登录 ---------------- */
.auth-tabs{display:flex;background:#ebeff6;border-radius:14px;padding:5px;margin-bottom:20px}
.auth-tabs button{flex:1;height:46px;border:0;border-radius:11px;background:transparent;font-size:var(--fs-md);
  color:var(--txt2);font-weight:500;transition:all .15s}
.auth-tabs button.on{background:#fff;color:var(--pd);font-weight:600;box-shadow:0 2px 8px rgba(31,59,99,.10)}
.field{margin-bottom:16px}
.field label{display:block;font-size:var(--fs-xs);color:var(--muted);margin:0 0 7px 3px;font-weight:500}
.ipt{width:100%;height:56px;padding:0 16px;border:1.5px solid #dde4ef;border-radius:14px;background:#fbfcfe;
  font-size:var(--fs-md);color:var(--txt);font-family:inherit;outline:none;
  transition:border-color .15s,box-shadow .15s,background .15s}
.ipt:focus{border-color:#9db8ec;box-shadow:0 0 0 4px rgba(47,92,196,.10);background:#fff}
.ipt::placeholder{color:#aeb8c7}
.code-row{display:flex;gap:12px}
.code-row .ipt{flex:1}
.code-row .btn{flex:0 0 128px;height:56px;font-size:var(--fs-sm);border-radius:14px;background:var(--pl);color:var(--p);box-shadow:none}
.code-row .btn:disabled{color:#a6b1c3;background:#eff2f7}
.auth-tip{font-size:var(--fs-xs);color:var(--muted);text-align:center;margin-top:18px;line-height:1.85}
.auth-tip code{background:#ebeff6;padding:2px 8px;border-radius:6px;color:var(--p);font-size:var(--fs-xs)}

/* ---------------- 问卷 ---------------- */
.phead{position:sticky;top:calc(var(--nav-h) + env(safe-area-inset-top,0px));z-index:40;
  background:linear-gradient(var(--bg) 76%,rgba(242,245,250,0));padding:12px 0 14px;margin-bottom:2px}
.phead .top{display:flex;align-items:baseline;gap:9px;margin-bottom:9px}
.phead .top b{font-size:var(--fs-md);color:var(--pd);font-weight:600}
.phead .top span{font-size:var(--fs-xs);color:var(--muted)}
.phead .top .saved{margin-left:auto;font-size:var(--fs-xxs);color:#9aa5b6}
.pbar{height:8px;border-radius:8px;background:#e3e9f3;overflow:hidden}
.pbar i{display:block;height:100%;border-radius:8px;background:linear-gradient(90deg,#4a80e0,#2f5cc4);
  transition:width .35s ease}
.sec-intro{background:#eaf1ff;color:#3a5279;border-radius:13px;padding:14px 16px;font-size:var(--fs-sm);
  line-height:1.75;margin-bottom:14px;border-left:4px solid #b9cff5}
.q{background:#fff;border-radius:var(--r-sm);padding:18px 18px 16px;margin-bottom:14px;
  box-shadow:0 1px 3px rgba(31,59,99,.05)}
.q .lbl{font-size:var(--fs-q);font-weight:500;color:var(--txt);line-height:1.6}
.q .idx{display:inline-flex;align-items:center;justify-content:center;min-width:26px;height:26px;padding:0 7px;
  font-size:var(--fs-xxs);color:#5d7cb0;font-weight:600;margin-right:7px;background:#eef3fe;border-radius:8px;
  vertical-align:2px}
.q .tip{font-size:var(--fs-xs);color:var(--muted);margin-top:6px;line-height:1.6}
.opts{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.opt{position:relative;display:flex;align-items:center;gap:12px;width:100%;text-align:left;
  border:1.5px solid transparent;background:#f6f8fc;border-radius:13px;padding:15px 16px;
  font-size:var(--fs-md);color:#333f52;line-height:1.5;min-height:58px;
  transition:background .13s,border-color .13s,color .13s}
.opt:active{background:#edf2fb}
.opt .mark{width:22px;height:22px;flex:0 0 22px;border-radius:50%;border:2px solid #c2cddf;background:#fff;
  position:relative;transition:all .13s}
.opt.sq .mark{border-radius:7px}
.opt.on{background:#eaf2ff;border-color:#b9d0f6;color:#17335c;font-weight:600}
.opt.on .mark{border-color:var(--p);background:var(--p);box-shadow:0 0 0 3px rgba(47,92,196,.12)}
.opt.on .mark::after{content:"";position:absolute;left:6px;top:2.5px;width:6px;height:11px;
  border:2.2px solid #fff;border-top:0;border-left:0;transform:rotate(42deg)}
.opt .tx{flex:1}
.child{margin-top:12px;padding-left:14px;border-left:3px solid #dfe8f8}
.child label{display:block;font-size:var(--fs-sm);color:var(--txt2);margin-bottom:8px}
.q-foot{margin-top:12px;font-size:var(--fs-xxs);color:#a8b2c1}

/* 步速计时 */
.gait{background:#fff;border-radius:var(--r);padding:20px;box-shadow:var(--shadow)}
.gait h3{margin:0 0 7px;font-size:var(--fs-lg);color:var(--pd)}
.gait .sub{font-size:var(--fs-sm);color:var(--muted);line-height:1.75;margin-bottom:18px}
.trial{display:flex;align-items:center;gap:14px;padding:14px 0;border-top:1px solid var(--line)}
.trial .no{width:42px;height:42px;flex:0 0 42px;border-radius:12px;background:#eff4fc;color:var(--p);
  display:flex;align-items:center;justify-content:center;font-weight:600;font-size:var(--fs-sm)}
.trial .t{flex:1;min-width:0}
.trial .t b{display:block;font-size:var(--fs-md);color:var(--txt);font-weight:500}
.trial .t span{font-size:var(--fs-xxs);color:var(--muted)}
.trial .sec{font-variant-numeric:tabular-nums;font-size:22px;font-weight:700;color:var(--pd);
  min-width:78px;text-align:right;letter-spacing:-.3px}
.trial button{height:46px;padding:0 16px;border:0;border-radius:12px;font-size:var(--fs-sm);font-weight:600;
  background:var(--pl);color:var(--p)}
.trial button.on{background:linear-gradient(135deg,#e05a5a,#d24545);color:#fff;box-shadow:0 8px 14px -8px rgba(210,69,69,.85)}
.trial button:disabled{opacity:.45}
.seg{display:flex;gap:10px;margin-top:5px}
.seg button{flex:1;height:46px;border:1.5px solid #e2e8f2;border-radius:12px;background:#fff;
  font-size:var(--fs-sm);color:var(--txt2)}
.seg button.on{background:var(--pl);border-color:#c1d5f7;color:var(--p);font-weight:600}

/* ---------------- 知情同意 ---------------- */
.terms{background:#fff;border-radius:var(--r);padding:20px;box-shadow:var(--shadow);
  font-size:var(--fs-sm);line-height:1.9;color:#3a4457;max-height:46vh;overflow-y:auto;
  -webkit-overflow-scrolling:touch}
.terms h3{margin:0 0 12px;font-size:var(--fs-lg);color:var(--pd);text-align:center}
.terms h4{margin:18px 0 5px;font-size:var(--fs-sm);color:var(--pd);font-weight:600}
.terms p{margin:0 0 9px}
.signwrap{margin-top:16px}
.signwrap .hd{display:flex;align-items:center;margin-bottom:9px}
.signwrap .hd b{font-size:var(--fs-md);color:var(--pd);font-weight:600}
.signwrap .hd button{margin-left:auto;border:0;background:none;color:var(--p);font-size:var(--fs-xs);padding:6px 0}
.signbox{position:relative;background:#fff;border:1.5px dashed #c3d0e6;border-radius:14px;overflow:hidden}
.signbox canvas{display:block;width:100%;height:200px;touch-action:none}
.signbox .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:#bcc6d6;font-size:var(--fs-sm);pointer-events:none}
.checkbox{display:flex;align-items:flex-start;gap:12px;margin:16px 0 6px;font-size:var(--fs-sm);
  color:var(--txt2);line-height:1.6}
.checkbox .box{width:24px;height:24px;flex:0 0 24px;border-radius:7px;border:2px solid #c2cddf;background:#fff;
  margin-top:1px;position:relative;transition:all .13s}
.checkbox.on .box{background:var(--p);border-color:var(--p)}
.checkbox.on .box::after{content:"";position:absolute;left:6.5px;top:2.5px;width:6px;height:11px;
  border:2.2px solid #fff;border-top:0;border-left:0;transform:rotate(42deg)}

/* ---------------- 结果页 ---------------- */
.done-wrap{padding:56px 24px 24px;text-align:center}
.done-ic{width:92px;height:92px;border-radius:50%;margin:0 auto 24px;display:flex;align-items:center;
  justify-content:center;background:linear-gradient(135deg,#e5f7ef,#cfeedd);color:var(--ok);font-size:42px;
  animation:pop .45s cubic-bezier(.2,1.3,.5,1)}
@keyframes pop{0%{transform:scale(.6);opacity:0}100%{transform:scale(1);opacity:1}}
.done-wrap h2{margin:0 0 10px;font-size:23px;color:var(--pd)}
.done-wrap p{margin:0 0 7px;font-size:var(--fs-sm);color:var(--muted);line-height:1.85}
.done-card{background:#fff;border-radius:var(--r);padding:18px;box-shadow:var(--shadow);margin:24px 0;text-align:left}
.done-card .row{padding:12px 0;border-bottom:1px solid var(--line);background:transparent}
.done-card .row:last-child{border:0}
.done-card .row .k{font-size:var(--fs-sm);color:var(--muted);flex:0 0 96px}
.done-card .row .v{flex:1;text-align:right;font-size:var(--fs-md);color:var(--txt);font-weight:500}

/* ---------------- 浮层 ---------------- */
.toast{position:fixed;left:50%;bottom:calc(118px + var(--safe));transform:translate(-50%,12px);
  background:rgba(26,34,49,.94);color:#fff;font-size:var(--fs-sm);line-height:1.55;padding:13px 20px;
  border-radius:14px;max-width:78vw;text-align:center;z-index:120;opacity:0;pointer-events:none;
  transition:opacity .22s,transform .22s;backdrop-filter:blur(6px)}
.toast.show{opacity:1;transform:translate(-50%,0)}
.mask{position:fixed;inset:0;background:rgba(17,24,39,.46);z-index:100;display:none;align-items:center;
  justify-content:center;padding:24px;backdrop-filter:blur(2px)}
.mask.show{display:flex}
.sheet{width:100%;max-width:330px;background:#fff;border-radius:20px;padding:26px 22px 18px;text-align:center;
  animation:up .24s ease-out;box-shadow:0 24px 60px -20px rgba(17,24,39,.5)}
@keyframes up{from{transform:translateY(10px) scale(.97);opacity:0}to{transform:none;opacity:1}}
.sheet h3{margin:0 0 10px;font-size:19px;color:var(--pd)}
.sheet p{margin:0 0 20px;font-size:var(--fs-sm);color:var(--muted);line-height:1.8}
.sheet .acts{display:flex;gap:12px}
.sheet .acts .btn{flex:1;height:50px;font-size:var(--fs-md)}
.sheet .list{text-align:left;font-size:var(--fs-sm);color:var(--txt2);line-height:1.95;margin:0 0 18px;
  padding-left:2px}
.sheet .list b{color:var(--pd)}

/* 骨架屏 */
.sk{background:linear-gradient(90deg,#e9eef5 25%,#f4f7fb 37%,#e9eef5 63%);
  background-size:400% 100%;animation:shine 1.3s ease infinite;border-radius:12px}
@keyframes shine{0%{background-position:100% 0}100%{background-position:0 0}}
.sk-line{height:16px;margin-bottom:12px}
.sk-card{height:104px;border-radius:var(--r);margin-bottom:14px}

/* 小工具 */
.muted{color:var(--muted)}
.center{text-align:center}
.mt8{margin-top:8px}.mt14{margin-top:16px}.mb0{margin-bottom:0}
.hr{height:1px;background:var(--line);margin:16px 0}
.empty{padding:40px 20px;text-align:center;color:var(--muted);font-size:var(--fs-sm);line-height:1.8}
.msg-item{padding:13px 0;border-bottom:1px solid var(--line);display:flex;gap:11px;align-items:flex-start}
.msg-item:last-child{border:0}
.msg-item .dot{width:8px;height:8px;border-radius:50%;background:var(--p);margin-top:9px;flex:0 0 8px}
.msg-item .tx{flex:1;font-size:var(--fs-sm);color:var(--txt2);line-height:1.6}
.msg-item .tm{font-size:var(--fs-xxs);color:#a3adbd;white-space:nowrap}

@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* 超小屏（≤340px）轻微收敛，避免换行过多 */
@media (max-width:340px){
  :root{--fs-md:16px;--fs-q:17.5px;--fs-hero:24px;--fs-lg:17px}
  .q{padding:16px 15px 14px}
  .opt{padding:14px 14px;min-height:54px}
  .row{padding:15px 15px}
}

/* ================= 题目配图 / 施测量表图 ================= */
.sec-img{background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:10px 10px 8px;margin:0 0 14px;text-align:center;box-shadow:var(--shadow)}
.sec-img img{max-width:100%;height:auto;border-radius:8px;cursor:zoom-in}
.sec-img .cap{font-size:var(--fs-xxs);color:var(--muted);margin-top:6px}
.qimg{display:flex;flex-wrap:wrap;gap:10px;margin:2px 0 10px}
.qimg img{background:#fff;border:1px solid var(--line);border-radius:12px;padding:8px;
  box-sizing:border-box;height:auto;cursor:zoom-in}
.qimg img:only-child{width:100%;max-width:420px}
.qimg img:not(:only-child){flex:1 1 44%;min-width:150px;max-width:280px}
.img-note{font-size:var(--fs-xs);color:var(--p2);background:var(--pl);
  border-radius:10px;padding:6px 10px;margin:-4px 0 12px;line-height:1.6}
.imgzoom{position:fixed;inset:0;background:rgba(15,25,40,.88);z-index:999;
  display:flex;align-items:center;justify-content:center;padding:16px;cursor:zoom-out}
.imgzoom img{max-width:100%;max-height:92%;border-radius:10px;background:#fff;padding:8px;box-sizing:border-box}

/* ================= 病例资料上传 ================= */
.cats{display:flex;flex-wrap:wrap;gap:9px;margin:2px 0 14px}
.cat{font-family:inherit;font-size:var(--fs-sm);line-height:1;padding:10px 14px;border-radius:999px;
  border:1.5px solid var(--line);background:#fff;color:var(--txt2);cursor:pointer}
.cat.on{background:var(--pl);border-color:var(--p);color:#1d3f7d;font-weight:600}
.picks{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:12px}
.picks:empty{display:none}
.pick{position:relative;width:96px}
.pick .pv{width:96px;height:96px;border-radius:12px;overflow:hidden;background:#f4f7fc;
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center}
.pick .pv img{width:100%;height:100%;object-fit:cover}
.pick .pn{font-size:11.5px;color:var(--muted);margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pick .pn span{display:block}
.pick .del{position:absolute;top:-6px;right:-6px;width:24px;height:24px;border-radius:50%;border:none;
  background:rgba(210,69,69,.94);color:#fff;font-size:16px;line-height:1;cursor:pointer}
.pick-btns{display:flex;gap:10px;margin-bottom:12px}
.pick-btns .btn{flex:1;margin:0}
.pdf{font-size:12px;font-weight:700;color:#b4453f;background:#fdeceb;border-radius:8px;padding:10px 8px}
.frow{display:flex;gap:12px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}
.frow:last-child{border-bottom:none}
.fv{width:62px;height:62px;border-radius:10px;overflow:hidden;background:#f4f7fc;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.fv img{width:100%;height:100%;object-fit:cover;cursor:zoom-in}
.fm{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.fm b{font-size:var(--fs-md);color:var(--txt)}
.fm span{font-size:var(--fs-xs);color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fsdel{font-family:inherit;font-size:13px;color:var(--red);background:#fdeeee;border:1px solid #f6d8d8;
  border-radius:9px;padding:7px 12px;cursor:pointer;flex:0 0 auto}