/*背景动画*/
:root {
  --color1: 182, 147, 254;
  --color2: 243, 129, 129;
  --color3: 121, 132, 238;
  --color4: 63, 193, 201;
  --color5: 253, 95, 0;
  --color-interactive: 252, 206, 170;
  --circle-size: 80%;
  --blending: overlay;
}

#colors{
  background-color: rgba(198, 255, 221);  /* 色调最浅 */
  background-color: rgba(182, 147, 254);
  background-color: rgba(252, 227, 138);
  background-color: rgba(252, 206, 170);
  background-color: rgba(245, 175, 25);
  background-color: rgba(243, 129, 129);
  background-color: rgba(252, 81, 133);
  background-color: rgba(121, 132, 238);
  background-color: rgba(63, 193, 201);
  background-color: rgba(199, 104, 255);
  background-color: rgba(241, 39, 17);
  background-color: rgba(253, 95, 0);  /* 色调最深 */
}

.gradient-bg {
  width: 100vw;
  height: 100vh;
  position: absolute;
  overflow: hidden;
  top: 0;
  left: 0;
}

.gradient-bg .gradients-container {
  width: 100%;
  height: 100%;
}

.gradient-bg .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;
}

.gradient-bg .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;
}

.gradient-bg .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;
}

.gradient-bg .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: .7;
}

.gradient-bg .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;
}

.gradient-bg .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: .9;
}

@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%);
  }
}