:root{
  --brand:#e60012; /* 品牌正红（导航/按钮一致） */
  --ink:#222; --muted:#666; --line:#ececec; --bg:#f8f8f8; --card:#fff;
  --ok:#07c160; --ali:#1677ff;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--ink)}
a{text-decoration:none;color:inherit}
.container{max-width:760px;margin:0 auto;padding:16px}

/* 头部 */
.header-wrap{position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid rgba(0,0,0,.06)}
.header{color:#111}
.header-inner{max-width:760px;margin:0 auto;padding:14px 16px;min-height:68px;display:flex;align-items:center;gap:8px}
@media (min-width:480px){.header-inner{min-height:100px;padding:18px 20px}}

.logo{display:inline-flex;align-items:center;justify-content:center;width:auto;height:72px}
.logo img{height:100%;width:auto;display:block}
.brand-block{display:flex;flex-direction:column;align-items:flex-start}
.brand-title{font-weight:800;font-size:18px;line-height:1.15}
.brand-subtitle{margin-top:4px;font-size:12px;color:#666}
@media (min-width:480px){.brand-title{font-size:30px}.brand-subtitle{font-size:13px}}

/* 顶部导航 */
.top-nav{background:var(--brand)}
.nav-inner{max-width:760px;margin:0 auto;padding:0 16px;display:flex;gap:8px;overflow:auto}
@media (min-width:480px){.nav-inner{padding:0 20px}}
.nav-link{display:inline-flex;align-items:center;justify-content:center;height:42px;padding:0 14px;border-radius:999px;color:#fff;font-weight:700;white-space:nowrap;font-size:14px}
.nav-link:hover{background:rgba(255,255,255,.12)}
.nav-link.active{background:rgba(255,255,255,.18);box-shadow:inset 0 0 0 1px rgba(255,255,255,.25)}

/* 区块与表单 */
.section{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;margin:12px 0;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.section-title{display:flex;align-items:center;gap:8px;font-weight:700;margin-bottom:10px}
.input-row{display:flex;gap:10px}
.input{flex:1;height:44px;border:1px solid var(--line);border-radius:10px;padding:0 12px;font-size:15px;outline:none}
.input:focus{border-color:var(--brand)}
.btn{height:44px;border:none;border-radius:10px;padding:0 14px;font-weight:700;color:#fff;background:var(--brand);cursor:pointer}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.link-btn{background:#fff;border:1px solid var(--line);color:var(--ink)}
.tools{display:flex;gap:8px;margin-top:8px}
.tools .mini{flex:1;height:38px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--muted);font-size:13px}

/* 金额网格 */
.grid{display:grid;gap:10px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
@media (max-width:420px){.grid.cols-3{grid-template-columns:repeat(2,1fr)}}
.amount{position:relative;border:1.5px solid var(--line);border-radius:12px;background:#fff;padding:12px;text-align:center;cursor:pointer;transition:.2s}
.amount strong{font-size:16px}
.amount span{display:block;color:var(--muted);font-size:12px;margin-top:4px}
.amount.active{border-color:var(--brand);box-shadow:0 0 0 3px rgba(230,0,18,.12)}

/* 角标：人气左上、赠送右上 */
.badge{
  position:absolute;
  left:8px;
  top:8px;
  background:var(--brand);
  color:#fff;
  font-size:11px;
  padding:3px 6px;
  border-radius:999px;
  z-index:2;
}
.gift-tag{
  position:absolute;
  right:8px;
  top:8px;
  background:var(--ok); /* 改成 var(--brand) 可变红 */
  color:#fff;
  font-size:11px;
  padding:3px 6px;
  border-radius:999px;
  display:none;
  z-index:2;
}
.gift-tag.show{display:inline-block}

/* 说明与底部 */
.kv{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px}
.kv i{color:#bbb}
.notice{font-size:13px;color:#444;line-height:1.7}
.notice li{margin-left:1.1em}
.footer{padding:18px 0 28px;text-align:center;color:#888;font-size:12px}

/* 支付方式 */
.pay-mode{display:flex;gap:8px}
.mode-pill{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;height:40px;border:1px solid var(--line);border-radius:999px;background:#fff;cursor:pointer;font-weight:600}
.mode-pill.active{border-color:var(--brand);box-shadow:0 0 0 3px rgba(230,0,18,.12)}
.pay-rows{display:flex;gap:10px;margin-top:12px}
.pay{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);border-radius:12px;height:44px;background:#fff;cursor:pointer}
.pay.active{border-color:var(--brand);box-shadow:0 0 0 3px rgba(230,0,18,.12)}
.cam-wrap{display:grid;grid-template-columns:1fr;gap:10px;margin-top:12px}
.helper{font-size:12px;color:#999;margin-top:2px}

/* 弹层 */
.modal{position:fixed;inset:0;display:none;align-items:flex-end;justify-content:center;background:rgba(0,0,0,.35);z-index:50}
.sheet{width:100%;max-width:760px;background:#fff;border-radius:16px 16px 0 0;padding:14px;border-top:4px solid var(--brand);animation:up .18s ease}
@keyframes up{from{transform:translateY(16px);opacity:.7}to{transform:translateY(0);opacity:1}}
.sheet h3{font-size:16px;margin-bottom:8px}
.sheet .row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px dashed var(--line);font-size:14px}
.sheet .row:last-child{border-bottom:none}
.sheet .ok{color:var(--ok);font-weight:700}

/* 行为按钮区域 */
.actions{display:flex;gap:10px;margin-top:12px;justify-content:flex-start}
.actions .btn{flex:0 0 auto;height:40px;padding:0 16px}

/* 卡密输入框宽度优化 */
#cardpinPanel .cam-wrap > div .input{width:66.666%;max-width:520px}

/* 提交按钮（与导航同色） */
#btnSubmit{background:var(--brand)}
#btnSubmit:hover{filter:brightness(0.95)}
#btnSubmit:active{filter:brightness(0.9)}