1,行距
line-height:1.8em;
2,字体间距
letter-spacing:0.2em;
3,水平居中
text-align:center;
4,滑动底部监听
$(window).scroll(function(){
var scrollTop = $(this).scrollTop(); //scrollTop() 方法返回或设置匹配元素的滚动条的垂直位置
var scrollHeight = $(document).height(); //整个文档的高度
var windowHeight = $(this).height(); //当前可见区域的大小
if(scrollTop + windowHeight == scrollHeight){
alert('The page has been scrolled to the bottom')
}
})