缓慢进入效果

左进入：style="visibility: visible; animation-duration: 1500ms; animation-delay: 0ms; animation-name: fadeInLeft;" data-wow-delay="0ms" data-wow-duration="1500ms"

右进入：style="visibility: visible; animation-duration: 1500ms; animation-delay: 0ms; animation-name: fadeInRight;" data-wow-delay="0ms" data-wow-duration="1500ms"