好看的css预加载旋转动画 与 流光字体

<view class="concentric_round"></view>

body {
  background-color: #e9967a;
}
.concentric_round {
  width: 200rpx;
  height: 200rpx;
  position: relative;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -100%);
}
.concentric_round::after,
.concentric_round::before {
  content: '';
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
  opacity: 0.4;
  border-radius: 100%;
}
.concentric_round::before {
  width: 50%;
  height: 50%;
  animation: beform_round 0.6s ease-in-out infinite alternate;
}
.concentric_round::after {
  width: 100%;
  height: 100%;
  animation: after_round 0.6s ease-in-out infinite alternate;
}
/* 外圆 */
@-webkit-keyframes after_round {
  0% {
    transform: translate3d(-50%, -50%, 0) scale(1.3);
  }
  100% {
    transform: translate3d(-50%, -50%, 0) scale(1);
  }
}
@keyframes after_round {
  0% {
    transform: translate3d(-50%, -50%, 0) scale(1.3);
  }
  100% {
    transform: translate3d(-50%, -50%, 0) scale(1);
  }
}
/* 内圆 */
@-webkit-keyframes beform_round {
  0% {
    transform: translate3d(-50%, -50%, 0) scale(0.7);
  }
  100% {
    transform: translate3d(-50%, -50%, 0) scale(1);
  }
}
@keyframes beform_round {
  0% {
    transform: translate3d(-50%, -50%, 0) scale(0.7);
  }
  100% {
    transform: translate3d(-50%, -50%, 0) scale(1);
  }
}

<view class="preload">F-REWARD</view>

.preload {
  width: 100%;
  font-weight: bold;
  font-family: 'Arial', 'Microsoft YaHei', '黑体', '宋体', sans-serif;
  font-size: 2.5rem;
  text-align: center;
  background-image: -webkit-linear-gradient(left, black, transparent 25%, black 50%, transparent 75%, black);
  -webkit-text-fill-color: transparent;
  -webkit-background-clip: text;
  -webkit-background-size: 200% 100%;
  -webkit-animation: masked-animation 2s infinite linear;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -100%);
}
@-webkit-keyframes masked-animation {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: -100% 0;
  }
}