/* 顶部淡彩晕染 — 静态环境光，不抢照片 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 220px;
  background:
    radial-gradient(ellipse 80% 70% at 20% 0%, rgba(243, 196, 206, 0.35) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 10%, rgba(139, 184, 214, 0.18) 0%, transparent 55%);
  pointer-events: none;
  z-index: 0;
}

.container {
  position: relative;
  z-index: 1;
}

/* 保留 class 兼容 HTML，默认隐藏旧 emoji 装饰 */
.rainbow,
.cloud,
.star,
.balloon {
  display: none !important;
}

/* 气泡：更淡、更慢，仅作极轻点缀 */
.bubble {
  position: fixed;
  pointer-events: none;
  z-index: 1;
  border-radius: 50%;
  opacity: 0.35;
  animation: rise 12s ease-in infinite;
}

@keyframes rise {
  0% {
    transform: translateY(100vh) scale(0.6);
    opacity: 0;
  }
  12% {
    opacity: 0.28;
  }
  85% {
    opacity: 0.12;
  }
  100% {
    transform: translateY(-40px) scale(1);
    opacity: 0;
  }
}