光圈

index.css

@property --gradientAngle {
  syntax: "<percentage> | <angle>";
  inherits: false;
  initial-value: 0deg;
}

.wapper {
  width: 380px;
  position: relative;
  padding: 16px;
  border-radius: 8px;
  background-color: #fff;
  border: 1px solid rgba(229, 229, 229, 1);
  transition: all 0.3s linear;
  z-index: 0;
  &.isRunning {
    position: relative;
    --gradientAngle: 0deg;
    transition: all 0.3s ease;
    &::before {
      position: absolute;
      border-radius: 8px;
      content: "";
      z-index: -2;
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      transition: var(--gradientAngle) 0.3s linear;
      border: 0 solid #e5e7eb;
      box-sizing: border-box;
      animation: angleChange 2s infinite linear;
      background: linear-gradient(var(--gradientAngle), #0e42d2 36.34%, #fff 50.92%, #f0f0f0 63.72%),
        linear-gradient(var(--gradientAngle), #0e42d2 2.22%, #fff 18.5%, #f0f0f0 32.77%);
    }
    &::after {
      transition: var(--gradientAngle) 0.3s linear;
      content: "";
      position: absolute;
      background-color: #fff;
      border-radius: 8px;
      z-index: -1;
      top: 2px;
      right: 2px;
      bottom: 2px;
      left: 2px;
      border: 0 solid #e5e7eb;
      box-sizing: border-box;
    }
  }
}

@keyframes angleChange {
  0% {
    --gradientAngle: 0deg;
  }
  100% {
    --gradientAngle: 360deg;
  }
}