/* ===== 页脚按钮组件（收藏引导 + 小程序直连）· 计算器页/下载页共用 ===== */
/* 页脚 CTA 卡片（收藏 + 小程序）*/
.fav-mount{display:flex}
.fav-cta .fav-mount,.fav-cta-btns .fav-mount{display:block}
.fav-mount *, .fav-mask *, .fav-cta *{box-sizing:border-box}
.fav-cta{
  position:relative;overflow:hidden;
  max-width:720px;margin:14px auto 8px;padding:17px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  border-radius:16px;color:#fff;
  background:linear-gradient(135deg,#101a3d 0%,#1e3a8a 55%,#1d4ed8 100%);
  box-shadow:0 10px 28px rgba(29,78,216,.22);
}
.fav-cta::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(230px 90px at 90% 0%,rgba(96,165,250,.35),transparent 70%),
    radial-gradient(190px 90px at 4% 100%,rgba(59,130,246,.28),transparent 70%);
}
.fav-cta-txt{position:relative;min-width:0}
.fav-cta-txt b{display:block;font-size:15.5px;letter-spacing:.02em}
.fav-cta-txt span{display:block;margin-top:3px;font-size:12.5px;color:#c7d7f8}
.fav-cta-btns{position:relative;display:flex;gap:10px;flex:none}
@media(max-width:559px){
  .fav-cta{flex-direction:column;text-align:center;padding:16px 14px;gap:13px}
  .fav-cta-btns{width:100%}
  .fav-cta-btns .fav-mount{flex:1}
  .fav-cta-btns button{width:100%;justify-content:center}
}

/* 按钮 */
.fav-btn,.mp-btn{
  position:relative;
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  border:1px solid rgba(255,255,255,.55);border-radius:999px;
  background:rgba(255,255,255,.16);color:#fff;cursor:pointer;
  padding:8px 18px;font-size:13.5px;font-weight:600;line-height:1;
  transition:background .18s,border-color .18s,transform .18s,box-shadow .18s;
  -webkit-tap-highlight-color:transparent;
}
.fav-btn svg,.mp-btn svg{width:15px;height:15px;fill:currentColor;flex:none;transition:transform .3s}
.fav-btn:hover,.mp-btn:hover{background:rgba(255,255,255,.3)}
.fav-btn:hover svg{transform:rotate(72deg) scale(1.2)}
/* 页脚（浅色底）变体 */
.fav-btn.light{
  border-color:#c9d6f0;background:#fff;color:#2563eb;
  box-shadow:0 3px 10px rgba(2,8,23,.18);
}
.fav-btn.light:hover{background:#eef4ff;border-color:#a9c1ef}
/* 收藏星星 = 金色，悬停发亮 */
.fav-btn svg{fill:#fbbf24}
.fav-btn.light:hover svg{filter:drop-shadow(0 0 4px rgba(251,191,36,.8))}
/* 小程序 = 微信绿，呼吸光圈 + 悬停光泽扫过 + 上浮 */
.mp-btn{
  overflow:hidden;border:none;
  background:linear-gradient(135deg,#07c160,#059f52);
  padding:9px 20px;
}
.mp-btn::before{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  animation:mppulse 2.6s ease-out infinite;
}
@keyframes mppulse{
  0%{box-shadow:0 0 0 0 rgba(7,193,96,.45)}
  70%{box-shadow:0 0 0 9px rgba(7,193,96,0)}
  100%{box-shadow:0 0 0 0 rgba(7,193,96,0)}
}
@media(prefers-reduced-motion:reduce){.mp-btn::before{animation:none}}
.mp-btn::after{
  content:"";position:absolute;top:0;left:-80%;width:50%;height:100%;
  background:linear-gradient(105deg,transparent,rgba(255,255,255,.38),transparent);
  transform:skewX(-20deg);transition:left .5s ease;
}
.mp-btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(7,193,96,.38)}
.mp-btn:hover::after{left:135%}
.mp-btn:active{transform:translateY(0)}
.mp-btn svg{fill:#fff}
/* 弹层 */
.fav-mask{
  position:fixed;inset:0;z-index:9999;background:rgba(15,23,42,.5);
  display:flex;align-items:center;justify-content:center;padding:18px;
}
.fav-card{
  width:100%;max-width:430px;background:#fff;border-radius:14px;
  padding:20px 20px 16px;box-shadow:0 18px 50px rgba(2,8,23,.35);
  animation:favIn .18s ease;
}
@keyframes favIn{from{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1}}
.fav-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.fav-head h3{margin:0;font-size:16.5px;color:#0f172a}
.fav-x{
  border:none;background:#f1f5f9;color:#64748b;cursor:pointer;
  width:26px;height:26px;border-radius:50%;font-size:15px;line-height:1;
}
.fav-x:hover{background:#e2e8f0;color:#334155}
.fav-step{
  display:flex;gap:11px;padding:11px 12px;border-radius:10px;
  background:#f8fafc;border:1px solid #e8eef7;margin-bottom:9px;
}
.fav-step.on{background:#eef4ff;border-color:#c7dbfb}
.fav-step .n{
  flex:none;width:21px;height:21px;border-radius:50%;background:#cbd5e1;color:#fff;
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.fav-step.on .n{background:#2563eb}
.fav-step h4{margin:0 0 3px;font-size:13.8px;color:#1e293b}
.fav-step p{margin:0;font-size:12.8px;line-height:1.65;color:#475569}
.fav-dots{font-weight:800;color:#2563eb}
.fav-kbd{
  display:inline-block;padding:1px 7px;border:1px solid #cbd5e1;border-bottom-width:2px;
  border-radius:5px;background:#fff;font-size:12px;color:#334155;
}
.fav-tag{
  font-size:10.5px;font-weight:700;letter-spacing:.03em;color:#2563eb;
  background:#e0edff;border-radius:999px;padding:1px 7px;margin-left:5px;vertical-align:1px;
}
.fav-copy{
  width:100%;margin-top:2px;padding:10px;border:none;border-radius:9px;cursor:pointer;
  background:#16a34a;color:#fff;font-size:13.5px;font-weight:600;
}
.fav-copy:hover{background:#15803d}
.fav-tip{margin:9px 0 0;font-size:11.5px;color:#94a3b8;text-align:center}
/* toast */
.fav-toast{
  position:fixed;left:50%;bottom:9vh;transform:translateX(-50%) translateY(6px);
  background:rgba(15,23,42,.85);color:#fff;padding:9px 18px;border-radius:999px;
  font-size:13px;opacity:0;pointer-events:none;transition:all .25s;z-index:10000;white-space:nowrap;
}
.fav-toast.show{opacity:1;transform:translateX(-50%)}
/* 窄屏按钮缩写 */
.fav-btn .bt-m,.mp-btn .bt-m{display:none}
@media(max-width:479px){
  .fav-btn,.mp-btn{padding:8px 13px;font-size:12.8px}
  .fav-btn .bt-full,.mp-btn .bt-full{display:none}
  .fav-btn .bt-m,.mp-btn .bt-m{display:inline}
}