/* 容器 */
#balloons-container {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1024px;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  overflow: hidden;
}

/* 气球主体 */
.balloon {
  position: absolute;
  width: 50px;
  height: 40px;
  cursor: pointer;
  pointer-events: auto;
  overflow: visible;
  opacity: 0;
  animation: balloon-rise var(--duration) ease-in-out forwards;
}

/* 心形左半 */
.balloon-left {
  position: absolute;
  width: 25px;
  height: 40px;
  background: linear-gradient(135deg, #ff6b6b 0%, #e05050 100%);
  border-radius: 25px 25px 0 0;
  left: 25px;
  top: 0;
  transform: rotate(-45deg);
  transform-origin: 0% 100%;
}

/* 心形右半 */
.balloon-right {
  position: absolute;
  width: 25px;
  height: 40px;
  background: linear-gradient(135deg, #ff6b6b 0%, #e05050 100%);
  border-radius: 25px 25px 0 0;
  left: 0;
  top: 0;
  transform: rotate(45deg);
  transform-origin: 100% 100%;
}

/* 气球绳子 */
.balloon-rope {
  position: absolute;
  left: 50%;
  top: 38px;
  width: 14px;
  height: 50px;
  transform: translateX(-50%);
}

.rope-seg {
  position: absolute;
  background: rgba(150, 150, 150, 0.85);
  border-radius: 1px;
}

/* 红包主体 */
.redpacket {
  position: absolute;
  width: 32px;
  height: 44px;
  background: linear-gradient(180deg, #cc0000 0%, #e60012 40%, #cc0000 100%);
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(180, 0, 0, 0.5), inset 0 1px 0 rgba(255,100,100,0.3);
  cursor: pointer;
  pointer-events: auto;
  overflow: visible;
  opacity: 0;
  animation: redpacket-rise var(--duration) ease-in-out forwards;
}

/* 红包顶部 */
.redpacket::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 13px;
  background: linear-gradient(180deg, #b00000 0%, #cc0000 100%);
  border-radius: 4px 4px 0 0;
  border-bottom: 1.5px solid rgba(255,180,0,0.6);
}

/* 红包福字 */
.redpacket::after {
  content: '福';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -40%);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: radial-gradient(circle, #ffee88 0%, #ffcc00 60%, #e6a800 100%);
  border: 1.5px solid #ffcc00;
  box-shadow: 0 0 6px rgba(255,200,0,0.5), inset 0 1px 2px rgba(255,255,200,0.5);
  line-height: 15px;
  text-align: center;
  color: #c0392b;
}

/* 烟花祝福词动画 */
@keyframes word-appear {
  0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.4); }
  15%  { opacity:1; transform: translate(-50%, -50%) scale(1.15); }
  35%  { transform: translate(-50%, -50%) scale(1); }
  75%  { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -80%); }
}

/* 气球动画 - 平滑上升 */
@keyframes balloon-rise {
  0% {
    bottom: -60px;
    opacity: 0;
    transform: translateX(var(--x-offset)) rotate(0deg);
  }
  5% {
    opacity: 1;
  }
  50% {
    bottom: 80%;
    opacity: 1;
    transform: translateX(var(--x-offset)) rotate(0deg);
  }
  90% {
    bottom: 80%;
    opacity: 1;
    transform: translateX(var(--drift-end)) rotate(0deg);
  }
  100% {
    bottom: 120%;
    opacity: 0;
    transform: translateX(var(--drift-end)) rotate(var(--rotation));
  }
}

/* 红包动画 - 平滑上升 */
@keyframes redpacket-rise {
  0% {
    top: -80px;
    opacity: 0;
    transform: translateX(var(--x-offset)) rotate(var(--start-rotation));
  }
  5% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    top: 90%;
    opacity: 0;
    transform: translateX(var(--x-offset)) rotate(var(--end-rotation));
  }
}