红色按钮特效鼠标移入变化酷炫按钮

以下为部分代码展示

 button.zuisao::before {
      position: absolute;
      content: '';
      height: 0;
      width: 0;
      top: 0;
      left: 0;
      background: linear-gradient(135deg, rgba(33, 33, 33, 1) 0%, rgba(33, 33, 33, 1) 50%, rgba(150, 4, 31, 1) 50%, rgba(191, 4, 38, 1) 60%);
      border-radius: 0 0 0.5em 0;
      box-shadow: 0.2em 0.2em 0.2em rgba(0, 0, 0, 0.3);

详细特效请查看演示