/* ============================================================
   回到顶部按钮 + 彩蛋
   ============================================================ */

/* ═══════════ 回到顶部 ═══════════ */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 30px;
  z-index: 60;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(212, 162, 74, .35);
  background: rgba(16, 13, 15, .82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--c-gold);
  font-size: 17px;
  cursor: pointer;
  opacity: 0;
  transform: translateY(14px) scale(.9);
  pointer-events: none;
  transition: opacity .28s ease, transform .28s var(--ease),
              border-color .2s, color .2s;
}
.to-top.show {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.to-top:hover {
  border-color: var(--c-gold);
  color: #f0c66a;
  box-shadow: 0 0 22px rgba(212, 162, 74, .22);
}
/* 环形进度 */
.to-top .ring {
  position: absolute;
  inset: -1px;
  border-radius: 50%;
  background: conic-gradient(var(--c-gold) var(--p, 0%), transparent 0);
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 2px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 2px));
  opacity: .55;
  pointer-events: none;
}
.to-top .arrow {
  position: relative;
  z-index: 1;
  line-height: 1;
  transform: translateY(-1px);
}

/* ═══════════ 彩蛋:主页图热区 ═══════════ */
/* 主页 Hero 大图上的隐藏热区 —— 点某个位置会弹出小图/一句话 */
.egg-hot {
  position: absolute;
  z-index: 3;
  cursor: pointer;
  border-radius: 50%;
  transition: background .25s ease, box-shadow .25s ease;
}
.egg-hot:hover {
  background: radial-gradient(circle, rgba(212, 162, 74, .22), transparent 70%);
  box-shadow: 0 0 0 1px rgba(212, 162, 74, .3);
}

/* 彩蛋弹出的提示 */
.egg-pop {
  position: fixed;
  left: 50%;
  bottom: 12%;
  transform: translate(-50%, 20px);
  z-index: 120;
  max-width: min(560px, 86vw);
  padding: 20px 26px;
  background: rgba(14, 11, 13, .95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(212, 162, 74, .45);
  box-shadow: 0 24px 70px rgba(0, 0, 0, .7),
              0 0 0 1px rgba(0, 0, 0, .5);
  opacity: 0;
  pointer-events: none;
  transition: opacity .32s ease, transform .32s var(--ease);
  text-align: center;
}
.egg-pop.show {
  opacity: 1;
  transform: translate(-50%, 0);
  pointer-events: auto;
}
.egg-pop img {
  max-width: 100%;
  max-height: 46vh;
  display: block;
  margin: 0 auto 14px;
  border: 1px solid rgba(212, 162, 74, .18);
}
.egg-pop .egg-text {
  font-size: 14.5px;
  line-height: 1.9;
  letter-spacing: .05em;
  color: #c9c2ba;
}
.egg-pop .egg-text b {
  color: var(--c-gold);
  font-weight: 600;
}
.egg-pop .egg-close {
  position: absolute;
  top: 6px; right: 8px;
  width: 32px;
  height: 32px;
  display: grid; place-items: center;
  border: none;
  background: transparent;
  color: #8a837c;
  font-size: 19px;
  line-height: 1;
  cursor: pointer;
  transition: color .2s;
}
.egg-pop .egg-close:hover { color: var(--c-gold); }

/* ═══════════ 彩蛋:底部隐藏小图 ═══════════ */
/* 页面最底部有一张很淡的图,滚到底才显现 */
.egg-footer {
  position: relative;
  margin-top: 20px;
  padding: 0;
  text-align: center;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .7s ease, transform .7s var(--ease);
  pointer-events: none;
}
.egg-footer.show {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.egg-footer img {
  max-width: 190px;
  max-height: 190px;
  display: inline-block;
  filter: saturate(.75) brightness(.9);
  transition: filter .4s ease, transform .4s var(--ease);
  cursor: pointer;
}
.egg-footer img:hover {
  filter: saturate(1.1) brightness(1.05);
  transform: scale(1.04);
}
.egg-footer .egg-hint {
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--c-text-mute);
  opacity: .7;
}

/* ═══════════ 移动端 ═══════════ */
@media (max-width: 760px) {
  .to-top {
    right: 16px;
    bottom: 18px;
    width: 42px;
    height: 42px;
  }
  .egg-pop { bottom: 8%; padding: 16px 20px; }
}