:root{
  --red:#C8102E;
  --red-deep:#A00D25;  /* 运行时由页面内联样式覆盖为后台配置值 */
  --red-light:#E8455C;
  --red-soft:#FFF1F3;
  --ink:#1A1A1F;
  --ink-2:#5A5A66;
  --ink-3:#9095A0;
  --line:#EEEDF0;
  --bg:#F5F6F8;
  --radius:16px;
  --shadow:0 4px 20px rgba(20,20,30,.06);
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);font-size:15px;line-height:1.5;
  -webkit-font-smoothing:antialiased;
  max-width:560px;margin:0 auto;position:relative;
  min-height:100vh;
}
button{font-family:inherit;border:0;background:none;cursor:pointer;font-size:inherit;color:inherit}
input{font-family:inherit;border:0;outline:0;background:none;font-size:16px;color:inherit;width:100%}
a{text-decoration:none;color:inherit}
.page{display:none;min-height:100vh}
.page.active{display:block;animation:fadeUp .28s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------------- 登录页 ---------------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(160deg,var(--red) 0%,var(--red) 42%,var(--red-deep) 100%);
  padding:calc(env(safe-area-inset-top,0px) + 54px) 24px 84px;
  border-radius:0 0 28px 28px;color:#fff;
}
.hero-glow{
  position:absolute;width:340px;height:340px;right:-120px;top:-140px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.28),rgba(255,255,255,0) 68%);
}
.hero-glow::after{
  content:"";position:absolute;left:-190px;top:230px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,200,120,.22),rgba(255,255,255,0) 70%);
}
.hero-badge{
  display:inline-flex;align-items:center;gap:5px;
  font-size:12px;font-weight:600;letter-spacing:.4px;
  padding:5px 11px;border-radius:99px;
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.28);
  backdrop-filter:blur(6px);margin-bottom:16px;position:relative;
}
.hero-badge svg{width:13px;height:13px}
.hero-title{font-size:29px;line-height:1.3;font-weight:800;letter-spacing:.5px;position:relative}
.hero-title span{font-size:22px;font-weight:600;opacity:.95}
.hero-sub{margin-top:10px;font-size:13px;opacity:.82;position:relative;letter-spacing:.2px}

.card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}
.login-card{
  margin:-56px 16px 0;padding:24px 20px 20px;position:relative;z-index:2;
}
.field{margin-bottom:18px}
.field label{display:block;font-size:12.5px;font-weight:600;color:var(--ink-2);margin-bottom:8px;letter-spacing:.3px}
.input-row{
  display:flex;align-items:center;gap:10px;
  border:1.5px solid var(--line);border-radius:12px;
  padding:0 14px;height:50px;background:#FAFAFB;
  transition:border-color .2s,background .2s;
}
.input-row:focus-within{border-color:var(--red);background:#fff;box-shadow:0 0 0 3px rgba(200,16,46,.08)}
.prefix{font-size:14px;color:var(--ink-3);font-weight:600;padding-right:10px;border-right:1px solid var(--line)}
.clear-btn{width:22px;height:22px;border-radius:50%;background:#E3E4E8;color:#fff;font-size:15px;line-height:1;display:flex;align-items:center;justify-content:center}
.code-btn{
  flex:0 0 auto;height:34px;padding:0 12px;border-radius:9px;
  background:var(--red-soft);color:var(--red);font-size:13px;font-weight:700;white-space:nowrap;
  transition:opacity .2s;
}
.code-btn:disabled{opacity:.45;cursor:not-allowed;color:var(--ink-3);background:#F1F2F4}
.primary-btn{
  display:flex;align-items:center;justify-content:center;gap:6px;
  width:100%;height:50px;border-radius:12px;
  background:linear-gradient(135deg,var(--red),var(--red-deep));
  color:#fff;font-size:16.5px;font-weight:700;letter-spacing:.5px;
  box-shadow:0 6px 16px rgba(200,16,46,.28);
  transition:transform .12s,box-shadow .2s,opacity .2s;
  margin-top:6px;
}
.primary-btn:active{transform:scale(.985);box-shadow:0 3px 10px rgba(200,16,46,.24)}
.primary-btn.loading{opacity:.75;pointer-events:none}
.agreement{margin-top:14px;font-size:11.5px;color:var(--ink-3);text-align:center;line-height:1.6}
.login-tips{margin:22px 20px 0;padding-bottom:24px}
.login-tips p{font-size:11.5px;color:var(--ink-3);line-height:1.9}
.login-tips b{color:var(--ink-2);font-size:12px}

/* ---------------- 列表页 ---------------- */
.topbar{
  position:sticky;top:0;z-index:20;
  background:linear-gradient(135deg,var(--red),var(--red-deep));
  padding:calc(env(safe-area-inset-top,0px) + 12px) 16px 14px;
  border-radius:0 0 18px 18px;
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:9px}
.brand-dot{
  width:30px;height:30px;border-radius:9px;
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.25);
  position:relative;
}
.brand-dot::after{
  content:"";position:absolute;inset:0;margin:auto;width:12px;height:12px;border-radius:4px;
  background:#fff;
}
.brand-title{color:#fff;font-size:15.5px;font-weight:700;letter-spacing:.4px}
.brand-sub{color:rgba(255,255,255,.72);font-size:11px;margin-top:1px}
.ghost-btn{
  color:#fff;font-size:12.5px;padding:6px 13px;border-radius:99px;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.22);
}
.notice-strip{
  display:flex;align-items:center;gap:7px;
  margin:12px 16px 4px;padding:9px 12px;border-radius:10px;
  background:#FFF8E9;color:#8A6100;font-size:11.5px;
}
.notice-strip svg{width:14px;height:14px;flex:0 0 auto}

.coupon-list{padding:8px 16px 0}
.coupon{
  display:flex;background:#fff;border-radius:14px;overflow:hidden;
  box-shadow:0 2px 12px rgba(20,20,30,.055);margin-bottom:12px;
  position:relative;border:1px solid #F0F0F3;
}
.coupon-cover{
  flex:0 0 104px;width:104px;height:104px;background:#F0F1F4;position:relative;overflow:hidden;
}
.coupon-cover img{width:100%;height:100%;object-fit:cover;display:block}
.coupon-cover .ph{
  width:100%;height:100%;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#FFE7EB,#FFD9DF);color:var(--red);font-size:26px;font-weight:800;
}
.coupon-body{flex:1;min-width:0;padding:12px 12px 10px 12px;display:flex;flex-direction:column}
.coupon-merchant{font-size:15px;font-weight:700;color:var(--ink);letter-spacing:.2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.coupon-title{
  display:inline-block;margin-top:5px;font-size:11px;color:var(--red);font-weight:600;
  background:var(--red-soft);padding:2px 7px;border-radius:5px;max-width:100%;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.coupon-desc{
  margin-top:6px;font-size:11.5px;color:var(--ink-3);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  flex:1;
}
.coupon-foot{display:flex;align-items:center;justify-content:space-between;margin-top:8px;gap:8px}
.tag{font-size:10.5px;color:#B07000;background:#FFF6E5;padding:2px 7px;border-radius:4px;white-space:nowrap}
.claim-btn{
  flex:0 0 auto;padding:7px 15px;border-radius:99px;font-size:13px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--red),var(--red-deep));
  box-shadow:0 3px 8px rgba(200,16,46,.25);
  transition:transform .12s,opacity .2s;
  white-space:nowrap;
}
.claim-btn:active{transform:scale(.96)}
.claim-btn.done{
  background:#EDEEF1;color:#A8ADB8;box-shadow:none;pointer-events:none;
  font-weight:600;
}
.coupon.claimed .coupon-cover::after{
  content:"已领取";position:absolute;right:0;bottom:0;
  background:rgba(0,0,0,.55);color:#fff;font-size:10px;padding:2px 6px;border-radius:6px 0 0 0;
}

.empty{text-align:center;padding:70px 20px}
.empty-ico{font-size:44px;margin-bottom:12px;opacity:.5}
.empty p{font-size:14.5px;color:var(--ink-2);font-weight:600}
.empty span{display:block;margin-top:5px;font-size:12px;color:var(--ink-3)}
.footer-note{text-align:center;font-size:11px;color:#B6B9C2;padding:22px 0 6px}
.safe-bottom{height:calc(env(safe-area-inset-bottom,0px) + 16px)}

/* ---------------- 弹窗 ---------------- */
.modal-mask{
  position:fixed;inset:0;z-index:100;background:rgba(16,16,22,.5);
  backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;
  padding:0 30px;animation:fade .2s ease;
}
.modal-mask[hidden]{display:none}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal{
  background:#fff;border-radius:20px;padding:26px 22px 20px;width:100%;max-width:340px;
  text-align:center;animation:pop .26s cubic-bezier(.2,1.2,.4,1);
}
@keyframes pop{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:none}}
.modal-ico{
  width:54px;height:54px;border-radius:50%;margin:0 auto 14px;
  display:flex;align-items:center;justify-content:center;
}
.modal-ico svg{width:28px;height:28px}
.modal-ico.warn{background:#FFF1F3;color:var(--red)}
.modal-ico.ok{background:#E9F8EF;color:#17A34A}
.modal h3{font-size:18px;font-weight:800;margin-bottom:9px;letter-spacing:.3px}
.modal p{font-size:13px;color:var(--ink-3);line-height:1.75;margin-bottom:20px}
.modal .primary-btn{height:46px;font-size:15.5px}
.text-btn{display:block;width:100%;margin-top:10px;padding:9px;font-size:13.5px;color:var(--ink-3)}

/* ---------------- toast ---------------- */
.toast{
  position:fixed;left:50%;bottom:16%;transform:translate(-50%,10px);
  background:rgba(26,26,31,.9);color:#fff;font-size:13px;
  padding:10px 18px;border-radius:10px;z-index:200;
  opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;
  max-width:78vw;text-align:center;line-height:1.5;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* 骨架屏 */
.skeleton{background:#fff;border-radius:14px;height:104px;margin-bottom:12px;position:relative;overflow:hidden}
.skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.9),transparent);
  animation:shimmer 1.3s infinite;
}
@keyframes shimmer{from{transform:translateX(-100%)}to{transform:translateX(100%)}}