在我们html文件中，引入了2个css文件，分别为reset.css和login.css。下面我们就来看一下这2个css文件是如何实现布局的。

先来看一下reset.css，这里是对于整个html文件共同的元素需要统一设置的样式，

代码如下：

login.css是针对性的设置各个布局的样式

代码如下：

/*header*/

*{

-webkit-box-sizing: border-box;

-moz-box-sizing: border-box;

box-sizing: border-box;}

header{

width:100%;

height: 80px;

}

header .header-content{

box-sizing: border-box;

width: 990px;

height: 80px;

margin: 0 auto;

/*background-color: red;*/

}

header .header-content .logo{

float: left;

width: 160px;

height: 60px;

background: url("../image/icon.png") no-repeat 0 15px;

}

header .header-content span{

float: left;

font-size: 24px;

padding-left: 30px;

margin-top: 20px;

}

header .header-content .login{

float: right;

font-size: 12px;

margin-top: 55px;

padding-bottom: 5px;

font-family: Arial,Verdana,"\5b8b\4f53";

}

header .header-content .login i{

display: inline-block;

width: 18px;

height: 16px;

margin: 0 5px;

background: url("../image/msg-icon.png") no-repeat ;

}

header .header-content .login a{

color: #999;

position: relative;

top: -5px;

}

header .header-content .login a:hover {

color: #E4393C;

text-decoration: underline;

}

main{

width:100%;

height: 475px;

background-color: #E8C99A;

position: relative;

}

main section{

width: 990px;

height:100%;

margin:  0 auto;

background: url("../image/loginBg.jpg")no-repeat 0 0 ;

}

main section .login-content{

width: 346px;

height: 346px;

padding: 20px;

float: right;

top: 40px;  ;

background: #fff;

position: relative;

color: #666;

}

main section .login-content-top{

width:100%;

height: 55px;

border-bottom: 1px solid #f4f4f4;

position: absolute;

top: 0;

left:0;

}

main section .login-content-top a:hover,main section .login-content-top a:nth-child(2) {

font-weight: bold;

color: #e4393c;

}

main section .login-content-top a{

-webkit-box-sizing: border-box;

-moz-box-sizing: border-box;

box-sizing: border-box;

float: left;

width: 50%;

height: 100%;

padding: 0 20px;

text-align: center;

line-height: 55px;

color: #666;

font-size: 18px;

}

main section .login-content-notice{

-webkit-box-sizing: border-box;

-moz-box-sizing: border-box;

box-sizing: border-box;

width: 100%;

height: 23px;

position: relative;

background: #fef4e5;

color: #666;

margin: 40px auto 5px;

padding-left: 40px;

border: 1px solid #f6c090;

font-size: 12px;

line-height: 23px;

}

main section .login-content-notice i{

display: inline-block;

width: 16px;

height: 17px;

position: absolute;

left: 10px;

top: 3px;

background: url("../image/pwd-icons.png")no-repeat  -104px -24px;

}

main section form{

width: 100%;

}

main section form .form-item{

border: 1px solid #bdbdbd;

height: 38px;

width: 100%;

margin-bottom: 20px;

position: relative;

}

main section form .form-item label{

position: absolute;

top: 0;

left: 0px;

width: 38px;

height: 36px;

border-right: 1px solid #bdbdbd;

}

main section form .form-item input{

height: 100%;

width:100%;

padding-left: 45px;

color: #666;

border: none;

}

main section form .form-item:nth-child(1) label{

background: url("../image/pwd-icons.png") no-repeat ;

}

main section form .form-item:nth-child(2) label{

background: url("../image/pwd-icons.png") no-repeat -48px 0;

}

main section form .form-check{

font-size: 12px;

}

main section form .form-check label{

margin-left: 5px;

vertical-align: top;

}

main section form .form-check a{

float: right;

color: #666;

}

main section form .form-check a:hover{

color: #E4393C;

text-decoration: underline;

}

main section form input[type = submit]{

width:100%;

height: 31px;

background: #e4393c;

color: #ffffff;

font-size: 18px;

word-spacing: 1em;

border: 1px solid #e85356;

margin-top: 15px;

}

main section .login-content-bottom{

width:100%;

position: absolute;

bottom:0;

left: 0;

padding: 0 18px;

line-height: 50px;

border-top: 1px solid #f4f4f4;

background-color: #fcfcfc;

}

main section .login-content-bottom a{

font-size: 12px;

}

main section .login-content-bottom span{

padding-left: 1px;

margin: 0 5px;

font-size: 10px;

background-color: #999;

}

main section .login-content-bottom a i{

width: 19px;

height: 18px;

display: inline-block;

position: relative;

top: 5px;

}

main section .login-content-bottom a:nth-child(1) i{

margin-right: 5px;

background: url("../image/QQ-weixin.png") no-repeat;

}

main section .login-content-bottom a:nth-child(3) i{

margin-right: 5px;

background: url("../image/QQ-weixin.png") no-repeat -20px 0;

}

main section .login-content-bottom a:nth-child(6){

float: right;

}

main section .login-content-bottom a:nth-child(6) i{

margin-right: 5px;

background: url("../image/pwd-icons.png")-104px -75px no-repeat;;

}

main section .login-content-bottom a:hover {

color: #e4393c;

text-decoration: underline;

}

/*footer*/

footer{

font-size: 12px;

text-align: center;

border-top: solid 1px #e6e6e6;

color: #999;

padding-bottom: 30px;

}

footer p a{

font-size: 12px;

text-align: center;

color: #999;

}

footer p:nth-child(1){

padding-top: 30px;

padding-bottom: 15px;

}

footer p span{

padding-left: 1px;

margin: 0 10px;

font-size: 10px;

background-color: #999;

}