:root{
  --brand:#FF4FA3;
  --brand-deep:#FF2D86;
  --ink:#1F2937;
  --muted:#6B7280;

  --bg:#FFF1F8;
  --card:#FFFFFF;
  --line:#FFD2E6;

  --radius:16px;
  --shadow:0 10px 24px rgba(255,79,163,.18);
  --grad:linear-gradient(135deg,#FF79C6 0%, #FF4FA3 45%, #FF2D86 100%);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Roboto,Segoe UI,Arial,Helvetica,sans-serif;
  color:var(--ink);
  background:var(--bg)
}
a{color:var(--brand-deep);text-decoration:none}
.wrap{max-width:720px;margin:0 auto;padding:14px 14px 88px}

/* 首屏 */
.hero{
  background:var(--grad);
  color:#fff;
  border-radius:22px;
  padding:14px 16px 18px;
  box-shadow:var(--shadow);
  text-align:center
}
.logo{display:flex;justify-content:center;align-items:center;margin-bottom:6px}
.logo img{height:56px;width:auto;max-width:100%;object-fit:contain}
h1{margin:6px 0 4px;font-size:22px;line-height:1.35;font-weight:900}
.sub{margin:6px auto 10px;font-size:14px;line-height:1.55;max-width:90%;opacity:.95}
.chips{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.chip{
  font-size:12px;
  background:#fff;
  color:var(--brand-deep);
  border:1px solid rgba(255,255,255,.65);
  padding:4px 10px;
  border-radius:999px;
  box-shadow:0 2px 8px rgba(255,45,134,.12);
  font-weight:700
}

/* 通用面板 */
.panel{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px;margin-top:14px}

/* 面包屑 */
.crumbs{display:flex;gap:6px;align-items:center;font-size:13px;color:#6b7280;margin:12px 6px 4px}
.crumbs a{color:var(--brand-deep);text-decoration:underline;text-underline-offset:2px}

/* 账号输入 */
.id-card .head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.id-title{display:flex;align-items:center;gap:8px;font-weight:900;font-size:18px;color:var(--brand-deep)}
.id-title svg{width:20px;height:20px;color:var(--brand-deep)}
.id-card .head a{font-size:13px;color:var(--brand-deep)}
.input-wrap{
  display:flex;align-items:center;gap:10px;
  background:#fff;
  border:1.5px solid var(--line);
  border-radius:14px;
  padding:10px 12px
}
.input-wrap:focus-within{border-color:#ff79c6}
.input-wrap input{flex:1;border:none;outline:none;font-size:16px;color:#111827;background:transparent}
.input-wrap input::placeholder{color:#9aa0a6}
.err{display:none;color:#ef4444;font-size:12px;margin-top:6px}

/* 标题 */
.only-title{font-weight:900;color:var(--brand-deep);margin-bottom:6px}

/* 档位（固定 HTML） */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}
.tier{
  background:#fff;
  border:1.5px solid var(--line);
  border-radius:14px;
  padding:10px;
  cursor:pointer;
  transition:.2s
}
.tier.active{
  border-color:var(--brand);
  box-shadow:0 8px 16px rgba(255,79,163,.20)
}
.tier-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.price{margin:0;font-size:16px;font-weight:900;color:#1F2937}
.tag{
  font-size:12px;
  padding:4px 8px;
  border-radius:999px;
  color:#fff;
  background:var(--brand)
}
.muted{color:var(--muted);font-size:13px}
.hint{margin-top:8px;color:var(--muted);font-size:12px}

/* 支付方式 */
.pay{display:flex;gap:10px;margin-top:10px}
.method{
  flex:1;
  background:#fff;
  border:1.5px dashed var(--line);
  border-radius:14px;
  padding:10px;
  display:flex;
  justify-content:center;
  align-items:center;
  gap:8px;
  font-weight:700
}
.method.active{border-style:solid;border-color:var(--brand)}
.method i{font-size:18px}
.method[data-pay="alipay"] i{color:#1677FF}
.method[data-pay="wechat"] i{color:#07C160}

/* 按钮与安全提示 */
.btn{
  width:100%;
  margin-top:12px;
  border:none;
  border-radius:14px;
  padding:14px 16px;
  background:var(--grad);
  color:#fff;
  font-weight:900;
  font-size:16px;
  box-shadow:0 12px 22px rgba(255,79,163,.22);
  cursor:pointer
}
.btn[disabled]{opacity:.6;cursor:not-allowed}
.btn.loading{position:relative;opacity:.9;pointer-events:none}
.btn.loading::after{
  content:"";
  position:absolute;
  right:16px;
  top:50%;
  width:16px;height:16px;
  margin-top:-8px;
  border:2px solid #fff;
  border-top-color:transparent;
  border-radius:50%;
  animation:spin .8s linear infinite
}
@keyframes spin{to{transform:rotate(360deg)}}
.secure{display:flex;gap:8px;align-items:center;justify-content:center;margin-top:6px;color:#777;font-size:12px}

/* 顶部飘窗 */
.toast{
  position:fixed;
  left:50%;
  top:8px;
  transform:translateX(-50%) translateY(-18px);
  background:rgba(255,255,255,.96);
  color:#111;
  padding:8px 12px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.7);
  box-shadow:0 8px 24px rgba(255,79,163,.16);
  font-size:13px;
  white-space:nowrap;
  z-index:99;
  opacity:0;
  pointer-events:none
}
.toast.show{animation:tin .35s ease forwards}
.toast.hide{animation:tout .3s ease forwards}
@keyframes tin{to{opacity:1;transform:translateX(-50%) translateY(0)}}
@keyframes tout{to{opacity:0;transform:translateX(-50%) translateY(-18px)}}

/* 说明与备案 */
#guide h3{font-size:20px;color:var(--brand-deep);margin:0 0 10px;font-weight:900}
#guide ul{font-size:13px;line-height:1.8;color:#1f2937}
#guide li{margin:6px 0}
.footer{margin-top:18px;padding:14px;text-align:center;color:#666;font-size:12px}
.icp{display:flex;flex-direction:column;gap:6px;align-items:center}

@media (max-width:360px){ .grid{grid-template-columns:1fr} }