:root{
  --red:#8B1D26;
  --dark-red:#5E1116;
  --gold:#C8A165;
  --cream:#FDF8F2;
  --brown:#3C2E2E;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--cream);
  color:var(--brown);
  line-height:1.6;
  padding:16px 12px 40px;
}
.coupon-page{max-width:520px;margin:0 auto;}

/* 头部 */
.cp-head{text-align:center;margin-bottom:18px;}
.cp-logo{
  display:block;margin:0 auto;max-width:92%;width:auto;max-height:78px;
}
.cp-sub{font-size:13px;color:#9a8a82;letter-spacing:3px;margin-top:10px;}

/* 券面舞台 */
.cp-stage{display:flex;flex-direction:column;gap:12px;margin-bottom:18px;}
.cp-ticket{position:relative;width:100%;border-radius:14px;overflow:hidden;
  box-shadow:0 8px 24px rgba(94,17,22,.18);background:#fff;}
.cp-img{display:block;width:100%;height:auto;}

/* 流水码徽标：叠加在正面券图顶部 */
.cp-serial-badge{
  position:absolute;top:14px;left:50%;transform:translateX(-50%);
  background:rgba(139,29,38,.92);color:#fff;border-radius:30px;
  padding:7px 18px;display:flex;align-items:center;gap:8px;
  box-shadow:0 4px 12px rgba(0,0,0,.25);white-space:nowrap;
}
.cp-serial-label{font-size:12px;opacity:.85;}
.cp-serial-no{font-size:18px;font-weight:800;letter-spacing:1px;color:var(--gold);}

/* 卡片 */
.cp-card{
  background:#fff;border:1px solid #f0e3d4;border-radius:16px;
  padding:22px 18px;box-shadow:0 6px 20px rgba(94,17,22,.08);
  margin-bottom:16px;
}
.cp-title{font-size:20px;color:var(--red);text-align:center;margin-bottom:8px;}
.cp-tip{font-size:13px;color:#7a6a62;text-align:center;margin-bottom:18px;}

/* 表单 */
.cp-form{display:flex;flex-direction:column;gap:14px;}
.cp-field{display:flex;flex-direction:column;gap:6px;}
.cp-field span{font-size:13px;color:var(--brown);font-weight:600;}
.cp-field input{
  border:1.5px solid #e8d8c6;border-radius:10px;padding:12px 14px;
  font-size:15px;outline:none;transition:border-color .2s;background:#fffdfa;
}
/* 调理需求选项卡 */
.cp-demand{display:flex;gap:10px;}
.cp-demand-item{
  flex:1;display:flex;align-items:center;justify-content:center;gap:6px;
  border:1.5px solid #e8d8c6;border-radius:10px;padding:12px 10px;
  background:#fffdfa;cursor:pointer;transition:all .2s;font-size:14px;
}
.cp-demand-item input{position:absolute;opacity:0;width:0;height:0;}
.cp-demand-item:has(input:checked){
  border-color:var(--red);background:#fff5f5;color:var(--red);font-weight:700;
  box-shadow:0 2px 8px rgba(139,29,38,.12);
}
.cp-field input:focus{border-color:var(--gold);}
.cp-agree{display:flex;gap:8px;align-items:flex-start;font-size:12px;color:#8a7a72;line-height:1.5;}
.cp-agree input{margin-top:3px;flex-shrink:0;width:16px;height:16px;accent-color:var(--red);}

.cp-btn{
  margin-top:6px;background:var(--red);color:#fff;border:none;border-radius:10px;
  padding:14px;font-size:16px;font-weight:700;cursor:pointer;letter-spacing:1px;
  transition:opacity .2s,transform .1s;
}
.cp-btn:active{transform:scale(.98);}
.cp-btn:disabled{opacity:.6;cursor:not-allowed;}
.cp-btn-gold{background:linear-gradient(135deg,var(--gold),#b8893f);color:#3C2E2E;}

.cp-msg{font-size:13px;text-align:center;padding:8px;border-radius:8px;}
.cp-msg-err{color:var(--red);background:#fbeaea;}
.cp-msg-ok{color:#2e7d32;background:#eafaf0;}

/* 成功区 */
.cp-success{text-align:center;}
.cp-ok{display:inline-block;background:var(--red);color:#fff;font-size:18px;font-weight:800;
  padding:8px 22px;border-radius:30px;margin-bottom:14px;}
.cp-serial-line{font-size:15px;margin-bottom:6px;}
.cp-serial-line b{color:var(--red);font-size:20px;letter-spacing:1px;}
.cp-hint{font-size:12px;color:#8a7a72;margin-bottom:16px;}
.cp-link{display:block;width:100%;margin-top:10px;background:none;border:none;
  color:#9a8a82;font-size:13px;cursor:pointer;text-decoration:underline;}

/* 页脚 */
.cp-foot{text-align:center;font-size:11px;color:#a99a92;line-height:1.8;margin-top:8px;}
.cp-disclaimer{margin-top:6px;color:#b5a59c;}

/* 短信验证码行 */
.cp-sms-row{display:flex;gap:8px;align-items:stretch;}
.cp-sms-row input{flex:1;min-width:0;}
.cp-sms-btn{flex:0 0 auto;white-space:nowrap;padding:0 14px;border:none;border-radius:10px;
  background:var(--gold,#c8a165);color:#3c2e2e;font-size:13px;font-weight:700;cursor:pointer;}
.cp-sms-btn:disabled{background:#e6dccf;color:#9a8a82;cursor:not-allowed;}