摘要:
.fixed-top {position:fixed;bottom:auto;top:0px;} .fixed-bottom {position:fixed;bottom:0px;top:auto;} .fixed-left {position:fixed;right:auto;left:0px;} .fixed-right {position:fixed;right:0px;left:auto;}* html,* html body {background-image:url(about:blank);background-attachment:fixed;} * html... 阅读全文