body{-webkit-text-size-adjust:none}body,body dl,body dt,body dd{margin:0}a{-webkit-tap-highlight-color:rgba(0,0,0,0)}.Header{z-index:10;font-family:"microsoft yahei", serif;background:white;height:200px;margin-bottom:20px;background:url("www_header/header_bg.jpg") top center no-repeat}.Header .book-nav>.cont .left,.Header .book-nav>.cont form{visibility:hidden}.Header .logo_search{margin:30px auto;position:relative;overflow:hidden;width:1200px}.Header .logo_search .logo{float:left;margin:0 50px;margin-left:0;display:block;background:url("./pic/logo/logo_4yt.net2x.png") no-repeat top center/contain;width:154px;height:50px}.Header .logo_search .so{float:left;width:324px;height:40px;background:url("./pic/icon/icon_search_bg.png") top center no-repeat}.Header .logo_search .so input{font-size:16px;float:left;padding:0 10px;margin:3px 0;margin-left:5px;padding-right:0;border:none;line-height:2.5;height:34px;border-radius:999px;color:#999}.Header .logo_search .so .q{width:253px;outline:none}.Header .logo_search .so .m{width:55px;border-radius:0 2px 2px 0;height:40px;outline:none;padding:0;margin:0;cursor:pointer;background:url("./pic/icon/icon_search.png") center center no-repeat}