:root{
  --brand:#FC470E;
  --brand-soft:rgba(252,71,14,.14);
  --navy:#213867;
  --sky:#BECDED;
  --bg:#0A1020;
  --bg2:#0E1428;
  --card:#141E36;
  --card2:#1A2540;
  --line:rgba(190,205,237,.16);
  --txt:#EAF0FA;
  --muted:#8E9CBB;
  --ok:#22C55E;
  --warn:#F59E0B;
  --r:18px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:
    radial-gradient(900px 500px at 12% -8%, rgba(252,71,14,.16), transparent 60%),
    radial-gradient(800px 500px at 92% 4%, rgba(33,56,103,.55), transparent 62%),
    var(--bg);
  color:var(--txt);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.6;
  min-height:100vh;
  padding-bottom:60px;
}
a{color:inherit;text-decoration:none}

.wrap{max-width:680px;margin:0 auto;padding:0 18px}

/* ---------- header ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(14px);
  background:rgba(10,16,32,.82);
  border-bottom:1px solid var(--line);
}
.topbar .wrap{display:flex;align-items:center;gap:10px;height:56px}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;letter-spacing:.06em;font-size:15px}
.logo .dot{width:22px;height:22px;border-radius:7px;background:linear-gradient(135deg,var(--brand),#FF8A3D);display:grid;place-items:center;font-size:12px;color:#fff}
.logo small{font-size:10px;color:var(--muted);font-weight:500;letter-spacing:.14em}
.back{color:var(--muted);font-size:13px;margin-left:auto}

/* ---------- typography ---------- */
h1{font-size:26px;line-height:1.3;margin:0 0 10px;font-weight:800;letter-spacing:-.01em}
h2{font-size:19px;margin:0 0 8px;font-weight:750}
.lede{color:var(--muted);font-size:14px;margin:0 0 22px}
.brand{color:var(--brand)}
.mono{font-variant-numeric:tabular-nums}

/* ---------- card ---------- */
.card{
  background:linear-gradient(180deg,var(--card),var(--bg2));
  border:1px solid var(--line);
  border-radius:var(--r);
  padding:20px;
  margin-bottom:16px;
}
.card.tight{padding:16px}
.q-title{font-size:17px;font-weight:700;margin:0 0 4px;line-height:1.45}
.q-sub{font-size:12.5px;color:var(--muted);margin:0 0 16px}
.q-num{
  display:inline-block;font-size:11px;letter-spacing:.1em;color:var(--brand);
  background:var(--brand-soft);border:1px solid rgba(252,71,14,.3);
  padding:3px 9px;border-radius:99px;margin-bottom:12px;font-weight:700;
}

/* ---------- options ---------- */
.opt{
  display:flex;align-items:flex-start;gap:11px;
  width:100%;text-align:left;
  background:var(--card2);
  border:1px solid var(--line);
  border-radius:14px;
  padding:14px 15px;
  margin-bottom:10px;
  color:var(--txt);
  font-size:15px;
  font-family:inherit;
  cursor:pointer;
  transition:transform .12s ease,border-color .12s ease,background .12s ease;
}
.opt:active{transform:scale(.985)}
.opt:hover{border-color:rgba(190,205,237,.34)}
.opt.sel{border-color:var(--brand);background:rgba(252,71,14,.1)}
.opt .k{
  flex:none;width:24px;height:24px;border-radius:8px;
  background:rgba(190,205,237,.1);border:1px solid var(--line);
  display:grid;place-items:center;font-size:12px;font-weight:700;color:var(--sky);
  margin-top:1px;
}
.opt.sel .k{background:var(--brand);border-color:var(--brand);color:#fff}
.opt .t{flex:1}
.opt .t em{display:block;font-style:normal;font-size:12px;color:var(--muted);margin-top:2px}
.opt.correct{border-color:var(--ok);background:rgba(34,197,94,.12)}
.opt.wrong{border-color:var(--brand);background:rgba(252,71,14,.12)}

/* ---------- button ---------- */
.btn{
  display:block;width:100%;
  background:linear-gradient(135deg,var(--brand),#FF7A2F);
  color:#fff;border:0;border-radius:14px;
  padding:15px;font-size:16px;font-weight:750;font-family:inherit;
  cursor:pointer;letter-spacing:.02em;
  box-shadow:0 8px 24px -8px rgba(252,71,14,.6);
  transition:transform .12s ease,opacity .12s;
}
.btn:active{transform:scale(.985)}
.btn:disabled{opacity:.38;box-shadow:none;cursor:not-allowed}
.btn.ghost{
  background:transparent;border:1px solid var(--line);color:var(--sky);
  box-shadow:none;font-weight:600;
}
.btn.sm{padding:12px;font-size:14px}
.row{display:flex;gap:10px}
.row .btn{flex:1}

/* ---------- progress ---------- */
.prog{height:5px;border-radius:99px;background:rgba(190,205,237,.14);overflow:hidden;margin:14px 0 20px}
.prog i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand),#FFB03D);transition:width .35s cubic-bezier(.3,1,.4,1)}
.prog-txt{font-size:11.5px;color:var(--muted);letter-spacing:.08em;margin-bottom:-8px}

/* ---------- result ---------- */
.hero{
  background:linear-gradient(160deg,rgba(252,71,14,.18),rgba(33,56,103,.4));
  border:1px solid rgba(252,71,14,.34);
  border-radius:22px;padding:26px 22px;text-align:center;margin-bottom:16px;
  position:relative;overflow:hidden;
}
.hero .tag{
  display:inline-block;font-size:11px;letter-spacing:.16em;font-weight:700;
  color:var(--brand);border:1px solid rgba(252,71,14,.45);
  padding:4px 11px;border-radius:99px;margin-bottom:14px;
}
.hero .big{
  font-size:56px;font-weight:850;line-height:1;letter-spacing:-.03em;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(135deg,#fff,var(--sky));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero .big small{font-size:20px;font-weight:700;-webkit-text-fill-color:var(--muted)}
.hero .name{font-size:24px;font-weight:800;margin:12px 0 6px}
.hero .desc{font-size:13.5px;color:var(--sky);opacity:.9;max-width:420px;margin:0 auto}

.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 10px;text-align:center}
.stat b{display:block;font-size:21px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.stat span{font-size:11px;color:var(--muted)}

.bars{margin-top:6px}
.bar{margin-bottom:13px}
.bar .lb{display:flex;justify-content:space-between;font-size:13px;margin-bottom:5px}
.bar .lb i{font-style:normal;color:var(--muted);font-size:12px}
.bar .tr{height:8px;border-radius:99px;background:rgba(190,205,237,.12);overflow:hidden}
.bar .tr i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand),#FFB03D);width:0;transition:width 1s cubic-bezier(.2,1,.3,1)}

.list{margin:0;padding:0;list-style:none}
.list li{
  display:flex;gap:10px;font-size:14px;color:var(--sky);
  padding:9px 0;border-bottom:1px dashed rgba(190,205,237,.14);
}
.list li:last-child{border-bottom:0}
.list li b{color:var(--txt);flex:none;font-weight:700}

.quote{
  border-left:3px solid var(--brand);
  background:rgba(252,71,14,.07);
  padding:13px 15px;border-radius:0 12px 12px 0;
  font-size:14.5px;line-height:1.7;margin:0;
}
.quote.blue{border-color:var(--sky);background:rgba(190,205,237,.07)}

.chips{display:flex;flex-wrap:wrap;gap:7px;margin:12px 0 0}
.chip{
  font-size:11.5px;padding:5px 11px;border-radius:99px;
  background:rgba(190,205,237,.09);border:1px solid var(--line);color:var(--sky);
}
.chip.hot{background:rgba(252,71,14,.14);border-color:rgba(252,71,14,.4);color:#FFB59B;font-weight:700}

/* ---------- canvas card ---------- */
#shotWrap{margin-top:14px;border-radius:16px;overflow:hidden;border:1px solid var(--line);display:none}
#shotWrap img{width:100%;display:block}

/* ---------- lead form ---------- */
.lead{background:linear-gradient(180deg,rgba(33,56,103,.5),var(--bg2));border:1px dashed rgba(252,71,14,.42);border-radius:18px;padding:20px;margin-top:16px}
.lead h3{margin:0 0 6px;font-size:16.5px}
.lead p{margin:0 0 14px;font-size:13px;color:var(--muted)}
.field{margin-bottom:10px}
.field input,.field select{
  width:100%;background:var(--card2);border:1px solid var(--line);
  border-radius:12px;padding:12px 14px;color:var(--txt);
  font-size:15px;font-family:inherit;outline:none;
}
.field input:focus,.field select:focus{border-color:var(--brand)}
.field input::placeholder{color:#5F6E8C}
.lead .ok{display:none;color:var(--ok);font-size:13.5px;text-align:center;padding:8px 0}
.lead.done .ok{display:block}
.lead.done .form{display:none}

/* ---------- 留资后引导关注公众号 ---------- */
.lead-done{text-align:center;padding:18px 4px 6px;margin-top:14px;border-top:1px dashed rgba(190,205,237,.18)}
.lead-done h3{font-size:18px;margin:0 0 10px;color:#fff;font-weight:800}
.lead-done p.lead-done-sub{font-size:13.5px;color:var(--sky);margin:0 0 16px;line-height:1.7;opacity:.92}
.lead-done .lead-qr{
  display:inline-block;background:#fff;padding:10px;border-radius:14px;
  border:1px solid var(--line);margin-bottom:14px;
  box-shadow:0 6px 24px -8px rgba(0,0,0,.5);
}
.lead-done .lead-qr img{width:160px;height:160px;display:block;border-radius:8px}
.lead-done .lead-tip{font-size:13px;color:var(--muted);line-height:1.75;margin:6px 0 0}
.lead-done .lead-tip b{color:var(--txt);font-weight:700}

/* ---------- 自动跳转提示 ---------- */
.tip-hint{font-size:12.5px;color:var(--sky);opacity:.78;text-align:center;margin:8px 0 14px;background:rgba(190,205,237,.06);border:1px solid rgba(190,205,237,.12);border-radius:10px;padding:8px 12px}

/* ---------- 留资钩子（白皮书等诱饵） ---------- */
.lead-hook{text-align:center;margin-bottom:14px;padding:18px 14px;background:linear-gradient(135deg,rgba(252,71,14,.22),rgba(252,71,14,.06));border:2px solid var(--orange);border-radius:14px;box-shadow:0 8px 32px -10px rgba(252,71,14,.4)}
.lead-hook-main{margin:0 0 10px;font-size:16px;color:#fff;line-height:1.55;font-weight:700;letter-spacing:.2px}
.lead-hook-main .hl{color:#FFD23F;font-weight:800;font-size:17px;text-shadow:0 0 18px rgba(252,71,14,.6)}
.lead-hook-sub{margin:0;font-size:12.5px;color:var(--sky);opacity:1;line-height:1.7}
.lead-hook-sub .pill{display:inline-block;padding:3px 11px;background:rgba(252,71,14,.28);color:#fff;border:1px solid rgba(252,71,14,.5);border-radius:99px;margin:0 3px;font-weight:700;font-size:11.5px}

.fine{font-size:11px;color:#5F6E8C;text-align:center;margin:10px 0 0}

/* ---------- hub ---------- */
.hub-item{
  display:flex;gap:14px;align-items:center;
  background:linear-gradient(135deg,var(--card),var(--bg2));
  border:1px solid var(--line);border-radius:18px;
  padding:17px;margin-bottom:13px;transition:border-color .15s,transform .1s;
}
.hub-item:active{transform:scale(.99)}
.hub-item:hover{border-color:rgba(252,71,14,.5)}
.hub-ico{
  flex:none;width:52px;height:52px;border-radius:15px;
  display:grid;place-items:center;font-size:24px;
  background:linear-gradient(135deg,rgba(252,71,14,.22),rgba(33,56,103,.5));
  border:1px solid rgba(252,71,14,.25);
}
.hub-txt{flex:1;min-width:0}
.hub-txt b{display:block;font-size:16px;margin-bottom:3px}
.hub-txt span{font-size:12.5px;color:var(--muted);display:block;line-height:1.5}
.hub-txt .meta{display:flex;gap:6px;margin-top:7px}
.hub-txt .meta i{font-style:normal;font-size:10.5px;padding:2px 8px;border-radius:99px;background:rgba(190,205,237,.1);color:var(--sky)}
.hub-arrow{flex:none;color:var(--muted);font-size:18px}

.foot{text-align:center;color:#4E5C79;font-size:11.5px;margin:26px 0 10px;line-height:1.8}

.fade{animation:fade .35s ease both}
@keyframes fade{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.pop{animation:pop .45s cubic-bezier(.2,1.4,.4,1) both}
@keyframes pop{from{opacity:0;transform:scale(.94)}to{opacity:1;transform:none}}

.hidden{display:none!important}
.timer{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.review{border-top:1px solid var(--line);padding-top:14px;margin-top:6px}
.review .rv{background:var(--card2);border:1px solid var(--line);border-radius:13px;padding:13px 15px;margin-bottom:9px;font-size:13.5px}
.review .rv b{display:block;font-size:13.5px;margin-bottom:5px}
.review .rv .ans{color:var(--ok);font-size:12.5px;margin:6px 0 0}
.review .rv .ex{color:var(--muted);font-size:12.5px;margin-top:5px;line-height:1.65}
.review-fold{display:none}
.review-fold.open{display:block}

/* ---------- share sheet ---------- */
.share-sheet{position:fixed;inset:0;z-index:200;display:flex;align-items:flex-end;justify-content:center}
.share-sheet .sheet-mask{position:absolute;inset:0;background:rgba(5,8,18,.66);backdrop-filter:blur(4px)}
.share-sheet .sheet-card{
  position:relative;width:100%;max-width:520px;
  background:linear-gradient(180deg,var(--card),var(--bg2));
  border-top:1px solid rgba(252,71,14,.34);
  border-radius:22px 22px 0 0;
  padding:20px 20px calc(20px + env(safe-area-inset-bottom));
  margin:0 0 0;
}
.sheet-hd{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.sheet-hd b{font-size:17px;font-weight:800}
.sheet-close{font-size:24px;color:var(--muted);width:30px;height:30px;display:grid;place-items:center;border-radius:99px}
.sheet-close:active{background:rgba(190,205,237,.08)}
.sheet-tip{font-size:13px;color:var(--muted);margin:0 0 14px;line-height:1.65}
.sheet-tip2{font-size:12px;color:#5F6E8C;text-align:center;margin:12px 0 0;line-height:1.7}
.sheet-qr{text-align:center;margin-bottom:14px}
.sheet-qr img{
  width:196px;height:196px;border-radius:14px;
  background:#fff;padding:8px;
  border:1px solid var(--line);
  display:inline-block;
}
.sheet-qr div{font-size:12px;color:var(--muted);margin-top:8px}
.sheet-follow{
  display:flex;align-items:center;gap:12px;
  margin-top:16px;padding-top:14px;border-top:1px dashed rgba(190,205,237,.16);
}
.sheet-follow img{
  flex:none;width:52px;height:52px;border-radius:10px;
  background:#fff;padding:3px;border:1px solid var(--line);
}
.sheet-follow-t b{display:block;font-size:14px}
.sheet-follow-t span{font-size:11.5px;color:var(--muted)}
.sheet-link{display:flex;gap:8px}
.sheet-link input{
  flex:1;background:var(--card2);border:1px solid var(--line);
  border-radius:12px;padding:12px 14px;color:var(--txt);
  font-size:13px;font-family:inherit;outline:none;min-width:0;
}
.sheet-link .btn{padding:12px 14px;font-size:13.5px;flex:none}

/* ---------- image share sheet ---------- */
.sheet-img-card .sheet-tip{margin-bottom:12px}
.sheet-img-wrap{
  max-height:56vh;overflow:auto;
  background:var(--card2);
  border:1px solid var(--line);border-radius:14px;
  padding:6px;
  margin-bottom:14px;
  -webkit-overflow-scrolling:touch;
}
.sheet-img-wrap img{width:100%;display:block;border-radius:8px}
.sheet-actions{display:flex;gap:10px}
.sheet-actions .btn{flex:1;padding:13px;font-size:14px}
.sheet-actions .btn.ghost{box-shadow:none;background:transparent;border:1px solid var(--line)}

/* ---------- history ---------- */
.hist{display:grid;gap:10px;margin-top:10px}
.hist-item{
  display:flex;align-items:center;gap:12px;
  background:var(--card2);border:1px solid var(--line);border-radius:14px;
  padding:14px 16px;
}
.hist-ico{flex:none;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-size:20px;background:rgba(252,71,14,.12);border:1px solid rgba(252,71,14,.25)}
.hist-txt{flex:1;min-width:0}
.hist-txt b{font-size:14.5px;display:block;margin-bottom:2px}
.hist-txt span{font-size:12px;color:var(--muted)}
.hist-time{flex:none;font-size:11.5px;color:var(--muted);font-variant-numeric:tabular-nums}

.hub-item.qr-card{
  margin-top:16px;
  background:linear-gradient(135deg,rgba(190,205,237,.05),var(--bg2));
  border:1px solid var(--line);
}
.hub-item.qr-card .hub-ico{font-size:18px;background:rgba(190,205,237,.08);border-color:rgba(190,205,237,.18)}
.lock{filter:blur(4px);user-select:none;pointer-events:none;opacity:.7}