/* 动效背景样式 */

.animated-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  overflow: hidden;
  background: linear-gradient(40deg, var(--color-bg1, rgb(108, 0, 162)), var(--color-bg2, rgb(0, 17, 82)));
}

.animated-background svg {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
}

/* 动效背景变量 */
:root {
  --color-bg1: rgb(108, 0, 162);
  --color-bg2: rgb(0, 17, 82);
  --color1: 18, 113, 255;
  --color2: 221, 74, 255;
  --color3: 100, 220, 255;
  --color4: 200, 50, 50;
  --color5: 180, 180, 50;
  --color-interactive: 140, 100, 255;
  --circle-size: 80%;
  --blending: hard-light;
}

.gradients-container {
  filter: url(#goo) blur(40px);
  width: 100%;
  height: 100%;
}

/* 渐变球体动画 */
.g1 {
  position: absolute;
  background: radial-gradient(circle at center, rgba(var(--color1), 0.8) 0, rgba(var(--color1), 0) 50%) no-repeat;
  mix-blend-mode: var(--blending);
  width: var(--circle-size);
  height: var(--circle-size);
  top: calc(50% - var(--circle-size) / 2);
  left: calc(50% - var(--circle-size) / 2);
  transform-origin: center center;
  animation: moveVertical 30s ease infinite;
  opacity: 1;
}

.g2 {
  position: absolute;
  background: radial-gradient(circle at center, rgba(var(--color2), 0.8) 0, rgba(var(--color2), 0) 50%) no-repeat;
  mix-blend-mode: var(--blending);
  width: var(--circle-size);
  height: var(--circle-size);
  top: calc(50% - var(--circle-size) / 2);
  left: calc(50% - var(--circle-size) / 2);
  transform-origin: calc(50% - 400px);
  animation: moveInCircle 20s reverse infinite;
  opacity: 1;
}

.g3 {
  position: absolute;
  background: radial-gradient(circle at center, rgba(var(--color3), 0.8) 0, rgba(var(--color3), 0) 50%) no-repeat;
  mix-blend-mode: var(--blending);
  width: var(--circle-size);
  height: var(--circle-size);
  top: calc(50% - var(--circle-size) / 2 + 200px);
  left: calc(50% - var(--circle-size) / 2 - 500px);
  transform-origin: calc(50% + 400px);
  animation: moveInCircle 40s linear infinite;
  opacity: 1;
}

.g4 {
  position: absolute;
  background: radial-gradient(circle at center, rgba(var(--color4), 0.8) 0, rgba(var(--color4), 0) 50%) no-repeat;
  mix-blend-mode: var(--blending);
  width: var(--circle-size);
  height: var(--circle-size);
  top: calc(50% - var(--circle-size) / 2);
  left: calc(50% - var(--circle-size) / 2);
  transform-origin: calc(50% - 200px);
  animation: moveHorizontal 40s ease infinite;
  opacity: 0.7;
}

.g5 {
  position: absolute;
  background: radial-gradient(circle at center, rgba(var(--color5), 0.8) 0, rgba(var(--color5), 0) 50%) no-repeat;
  mix-blend-mode: var(--blending);
  width: calc(var(--circle-size) * 2);
  height: calc(var(--circle-size) * 2);
  top: calc(50% - var(--circle-size));
  left: calc(50% - var(--circle-size));
  transform-origin: calc(50% - 800px) calc(50% + 200px);
  animation: moveInCircle 20s ease infinite;
  opacity: 1;
}

.interactive {
  position: absolute;
  background: radial-gradient(circle at center, rgba(var(--color-interactive), 0.8) 0, rgba(var(--color-interactive), 0) 50%) no-repeat;
  mix-blend-mode: var(--blending);
  width: 100%;
  height: 100%;
  top: -50%;
  left: -50%;
  opacity: 0.7;
}

/* 动画关键帧 */
@keyframes moveInCircle {
  0% {
    transform: rotate(0deg);
  }
  50% {
    transform: rotate(180deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes moveVertical {
  0% {
    transform: translateY(-50%);
  }
  50% {
    transform: translateY(50%);
  }
  100% {
    transform: translateY(-50%);
  }
}

@keyframes moveHorizontal {
  0% {
    transform: translateX(-50%) translateY(-10%);
  }
  50% {
    transform: translateX(50%) translateY(10%);
  }
  100% {
    transform: translateX(-50%) translateY(-10%);
  }
}

/* 响应式调整 */
@media (max-width: 768px) {
  :root {
    --circle-size: 60%;
  }
  
  .gradients-container {
    filter: url(#goo) blur(30px);
  }
}

@media (max-width: 480px) {
  :root {
    --circle-size: 40%;
  }
  
  .gradients-container {
    filter: url(#goo) blur(20px);
  }
}

/* 性能优化 */
@media (prefers-reduced-motion: reduce) {
  .g1,
  .g2,
  .g3,
  .g4,
  .g5 {
    animation: none;
  }
  
  .interactive {
    display: none;
  }
}

/* 暗色主题适配 */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg1: rgb(20, 20, 40);
    --color-bg2: rgb(40, 20, 60);
  }
}