光影动画按钮

代码实现

HTML

<button class="button">
  <svg width="18" height="18" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M8.98883 17.9652C8.44583 18.297 7.74902 17.9063 7.74902 17.2699V6.73023C7.74902 6.09386 8.44583 5.70307 8.98883 6.0349L17.6122 11.3047C18.1321 11.6225 18.1321 12.3776 17.6122 12.6954L8.98883 17.9652Z" fill="#fff"></path></svg>
  <span class="btnText">Watch the guided tour</span>
  <span class="light"></span>
</button>

CSS

.button {
  color: rgb(230, 230, 230);
  z-index: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 15px 5px 8px;
  border-radius: 99px;
  background: linear-gradient(black, black) padding-box padding-box, linear-gradient(to right, rgba(182, 177, 239, 0.2), rgba(224, 172, 131, 0.2)) border-box border-box;
  border: 1px solid transparent;
  box-shadow: rgba(0, 0, 0, 0.6) 0px 2px 8px -1px;
  transition: all 0.6s ease 0s;
  cursor: pointer;

  &::before {
    content: "";
    position: absolute;
    top: -1px;
    left: 14px;
    height: 1px;
    width: 32px;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.16));
    animation: 8s linear 0s infinite normal none running transLight;
    mix-blend-mode: difference;
  }

  .btnText {
    position: relative;
    margin-left: 4px;
    top: -1px;
    font-size: 13px;
    line-height: 13px;
  }

  .light {
    width: 21px;
    height: 21px;
    position: absolute;
    top: -11px;
    left: 36px;
    filter: blur(0.5px);
    transform-origin: center center;
    animation: 8s linear 0s infinite normal none running lightRorate;

    &::after, &::before {
      content: "";
      position: absolute;
    }

    &::before {
      width: 1px;
      height: 100%;
      left: 10px;
      top: 0;
      background: linear-gradient(transparent, rgba(224, 173, 135, 0.8), transparent);
    }
    &::after {
      width: 100%;
      height: 1px;
      left: 0;
      top: 10px;
      background: linear-gradient(to left, transparent, rgba(224, 173, 135, 0.8), transparent);
    }
  }
}

@keyframes transLight {
  0% {
    opacity: 0;
  }
  5% {
    opacity: 1;
  }
  50% {
    transform: translateX(94px);
    opacity: 1;
  }
  52% {
    transform: translateX(96px);
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}

@keyframes lightRorate {
  0% {
    opacity: 0;
  }
  15% {
    opacity: 0;
    transform: translateX(30px) rotate(-240deg) scale(0.5);
  }
  50% {
    transform: translateX(94px) rotate(-60deg) scale(1);
    opacity: 1;
  }
  55% {
    transform: translateX(96px) rotate(0deg) scale(0.4);
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}