:root{
  --red:#d6141e;
  --red2:#ef3b43;
  --dark:#7d0a10;
  --text:#1f2329;
  --gray:#8a9099;
  --soft:#fdecee;
  --warn:#fff6e0;
  --gold:#ffb400;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0}

body{
  min-height:100vh;
  min-height:100dvh;
  background:linear-gradient(170deg,var(--dark) 0%,var(--red) 38%,var(--red2) 100%);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}

.page{
  min-height:100vh;
  min-height:100dvh;
  max-width:480px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  position:relative;
  overflow:hidden;
}

/* ---------- 顶部 ---------- */
.hero{
  position:relative;
  padding:34px 24px 30px;
  text-align:center;
  color:#fff;
}
.hero::before,.hero::after{
  content:"";position:absolute;border-radius:50%;
  background:rgba(255,255,255,.08);pointer-events:none;
}
.hero::before{width:220px;height:220px;right:-70px;top:-60px}
.hero::after{width:140px;height:140px;left:-50px;bottom:-30px}

.logoBadge{
  position:relative;z-index:1;
  display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border-radius:18px;padding:12px 22px;
  box-shadow:0 10px 24px rgba(80,0,5,.28);
}
.logo{height:46px;display:block;object-fit:contain}
.logoText{font-size:30px;font-weight:900;font-style:italic;color:var(--red)}
.hero h1{position:relative;z-index:1;font-size:26px;font-weight:800;letter-spacing:2px;margin:18px 0 6px}
.slogan{position:relative;z-index:1;margin:0;font-size:14px;opacity:.9;letter-spacing:1px}

/* ---------- 白色主体（撑满剩余高度） ---------- */
.sheet{
  flex:1;
  background:#fff;
  border-radius:28px 28px 0 0;
  padding:26px 20px calc(24px + env(safe-area-inset-bottom));
  box-shadow:0 -8px 30px rgba(80,0,5,.18);
  display:flex;flex-direction:column;
}

/* 平台区块切换：默认显示苹果/电脑版，安卓由 html.android 切换 */
.only-android{display:none}
.android .only-android{display:block}
.android .only-ios{display:none}

/* ---------- 醒目提醒（苹果） ---------- */
.notice{
  position:relative;
  background:var(--warn);
  border:2px solid var(--red);
  border-radius:16px;
  padding:26px 16px 16px;
  text-align:center;
  animation:glow 1.6s ease-in-out infinite;
}
.notice .tag{
  position:absolute;left:50%;top:-14px;transform:translateX(-50%);
  background:var(--red);color:#fff;font-size:14px;font-weight:800;
  padding:4px 16px;border-radius:20px;white-space:nowrap;letter-spacing:1px;
  box-shadow:0 4px 10px rgba(214,20,30,.4);
}
.notice .big{font-size:21px;font-weight:900;line-height:1.5;color:var(--text)}
.notice .big em{font-style:normal;color:var(--red)}
.notice .warn{
  display:inline-block;margin-top:8px;
  font-size:19px;font-weight:900;color:#fff;
  background:var(--red);padding:5px 14px;border-radius:8px;
}
@keyframes glow{
  0%,100%{box-shadow:0 0 0 0 rgba(214,20,30,.35)}
  50%{box-shadow:0 0 0 8px rgba(214,20,30,0)}
}

/* ---------- 步骤 ---------- */
.steps{list-style:none;margin:20px 0 0;padding:0}
.steps li{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:0 0 18px 0;font-size:15px;line-height:1.5;font-weight:600;
}
.steps li:last-child{padding-bottom:0}
.steps li::before{
  content:"";position:absolute;left:15px;top:34px;bottom:2px;width:2px;
  background:repeating-linear-gradient(to bottom,#f0b8bb 0 4px,transparent 4px 8px);
}
.steps li:last-child::before{display:none}
.steps .n{
  flex:none;width:32px;height:32px;border-radius:50%;
  background:linear-gradient(135deg,var(--red),var(--red2));color:#fff;
  font-weight:800;display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 10px rgba(214,20,30,.3);
}
.steps small{display:block;color:var(--gray);font-weight:400;font-size:12px}
.steps b{color:var(--red)}

/* ---------- 应用信息（安卓） ---------- */
.appRow{display:flex;align-items:center;gap:14px;text-align:left}
.appRow img{width:72px;height:72px;border-radius:18px;box-shadow:0 6px 16px rgba(214,20,30,.3)}
.appRow .name{font-size:20px;font-weight:800}
.appRow .meta{font-size:13px;color:var(--gray);margin-top:3px}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 4px}
.chips span{font-size:12px;color:var(--red);background:var(--soft);padding:4px 10px;border-radius:20px;font-weight:600}

/* ---------- 按钮 ---------- */
.btn{
  position:relative;overflow:hidden;
  display:block;width:100%;margin-top:22px;
  padding:17px;border:0;border-radius:50px;text-align:center;
  background:linear-gradient(90deg,var(--red),var(--red2));
  color:#fff;font-size:19px;font-weight:800;letter-spacing:1px;text-decoration:none;
  box-shadow:0 10px 22px rgba(214,20,30,.4);
  animation:pulse 1.8s ease-in-out infinite;
}
.btn::after{
  content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.45),transparent);
  transform:skewX(-20deg);animation:shine 2.8s infinite;
}
.btn:active{opacity:.88}
@keyframes pulse{50%{transform:scale(1.025)}}
@keyframes shine{0%{left:-60%}60%,100%{left:130%}}

.tip{color:var(--gray);font-size:12px;text-align:center;margin:12px 0 0;line-height:1.6}
.tip b{color:var(--red)}

/* ---------- 安装指引（安卓） ---------- */
.guide{margin-top:22px;background:#f7f8fa;border-radius:14px;padding:14px 16px}
.guide h3{margin:0 0 10px;font-size:14px}
.guide ol{margin:0;padding-left:20px;font-size:13px;line-height:1.9;color:#4a4f57}
.guide b{color:var(--red)}

/* ---------- 特色 ---------- */
.features{
  list-style:none;margin:24px 0 0;padding:16px 0 0;
  border-top:1px solid #f0f1f3;
  display:grid;grid-template-columns:repeat(3,1fr);gap:8px;text-align:center;
}
.features .ic{
  width:44px;height:44px;margin:0 auto 6px;border-radius:50%;
  background:var(--soft);display:flex;align-items:center;justify-content:center;font-size:22px;
}
.features span{font-size:12px;color:#4a4f57}

.foot{margin-top:auto;padding-top:22px;text-align:center;color:#b5bac1;font-size:12px}
.hide{display:none}

/* ---------- 微信 / QQ 提示（安卓） ---------- */
#inapp{display:none;position:fixed;inset:0;z-index:30;background:rgba(0,0,0,.65);padding:20px}
#inapp .arrow{position:absolute;top:8px;right:18px;font-size:40px;color:#fff;animation:nudge 1s infinite}
#inapp .box{
  margin-top:80px;padding:24px 20px;background:#fff;border-radius:18px;
  text-align:center;font-size:16px;line-height:1.9;
}
#inapp b{color:var(--red)}
#inapp .btn{margin-top:16px;animation:none;padding:14px;font-size:16px}
#inapp .btn::after{display:none}
#inapp .close{margin-top:12px;color:var(--gray);font-size:13px}
@keyframes nudge{50%{transform:translate(4px,-6px)}}

@media (prefers-reduced-motion:reduce){
  .btn,.btn::after,.notice,#inapp .arrow{animation:none}
}