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 /*向下滑动的动画效果*/ @-webkit-keyframes drop { 0% { top:0px; opacity: 0;} 30% { top:10px; opacity: 1;} 100% { top:25px; opacity: 0;} } @keyframes drop { 0% { top:0px; opacity: 0;} 30% { top:10px; opacity: 1;} 100% { top:25px; opacity: 0;} } /*应用动画，添加按钮效果*/ .scroll-down { border: 2px solid #bbb; border-radius: 50%; margin: 0 auto; height: 50px; width: 50px; display: block; text-align: center; z-index: 10; -webkit-transition: all 0.125s ease-in-out 0s; -moz-transition: all 0.125s ease-in-out 0s; -ms-transition: all 0.125s ease-in-out 0s; -o-transition: all 0.125s ease-in-out 0s; transition: all 0.125s ease-in-out 0s; } .scroll-down span { position: relative; color: #bbb; font-size: 24px; -webkit-animation-name: drop; -webkit-animation-duration: 1s; -webkit-animation-timing-function: linear; -webkit-animation-delay: 0s; -webkit-animation-iteration-count: infinite; -webkit-animation-play-state: running; animation-name: drop; animation-duration: 1s; animation-timing-function: linear; animation-delay: 0s; animation-iteration-count: infinite; animation-play-state: running; }