CSS属性2_盒子模型：
1．盒子模型:控制布局
margin :外边距
padding :内边距
默认情况下内边距会影响整个盒子的大小
box-sizing: border-box;设置盒子的属性，让width和height就是最终盒子的大小
float :浮动
left
right
代码实现：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>CSS盒子模型属性</title>
<style type="text/css">
div{
/*border 边距*/
border: 1px solid red;
/*width 宽度*/
width: 100px;
}
.div1{
/*width 宽度*/
width: 100px;
/*height 高度*/
height: 100px;
/*外边距*/
/* margin： 50px; */
}
.div2{
/*width 宽度*/
width: 200px;
/*height 高度*/
height: 200px;
/*padding 内边距*/
padding: 50px;
/*
设置盒子的属性，让width和height就是最终盒子的大小
*/
box-sizing: border-box;
}
.div3{
/*float 左浮动*/
float: left;
}
.div4{
/*float 左浮动*/
float: left;
}
.div5{
/*float 右浮动*/
float: right;
}
</style>
</head>
<body>
<!--div块标签 class选择器-->
<div class="div2">
<div class="div1"></div>
</div>
<!--div块标签 class选择器-->
<div class="div3">aaaaa</div>
<!--div块标签 class选择器-->
<div class="div4">bbbbb</div>
<!--div块标签 class选择器-->
<div class="div5">ccccc</div>
</body>
</html>
CSS案例_注册页面：
完成以下注册界面：
代码实现：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
*{
margin: 0px;
padding: 0px;
box-sizing: border-box;
}
body{
background: url("../img/http.keji.jpg") no-repeat center;
}
.rg_layout{
width: 1000px;
height: 500px;
border: 8px solid #EEEEEE;
background-color: white;
/*让div水平居中*/
margin: auto;
margin-top: 15px;
}
.rg_left{
/*border: 1px solid red;*/
float: left;
margin: 15px;
}
.rg_left > p:first-child{
color: #FFD026;
font-size: 20px;
}
.rg_left > p:last-child{
color: #A6A6A6;
font-size: 20px;
}
.rg_center{
/*border: 1px solid red;*/
float: left;
width: 600px;
}
.rg_right{
/*border: 1px solid red;*/
float: right;
margin: 15px;
}
.rg_right > p:first-child{
font-size: 15px;
}
.rg_right p a{
color: pink;
}
.td_left{
width: 100px;
text-align: right;
height: 45px;
}
.td_right{
padding-left: 50px;
}
#username,#password,#email,#name,#tel,#birthday,#checkcode{
width: 251px;
height: 32px;
border: #A6A6A6 1px solid;
/*设置圆角边框*/
border-radius: 5px;
padding-left: 10px;
}
#checkcode{
width: 110px;
}
#img_check{
height: 32px;
vertical-align: middle;
}
#btn_sub{
width: 150px;
height: 40px;
background-color: #FFD026;
border: #FFD026 1px solid;
}
</style>
</head>
<body>
<div class="rg_layout">
<div class="rg_left">
<p>新用户注册</p>
<p>USER REGISTER</p>
</div>
<div class="rg_center">
<div class="rg_form">
<!--定义表单 form-->
<form action="#" method="post">
<table>
<tr>
<td class="td_left"><label for="username">用户名</label></td>
<td class="td_right"><input type="text" name="username" id="username" placeholder="请输入用户名"></td>
</tr>
<tr>
<td class="td_left"><label for="password">密码</label></td>
<td class="td_right"><input type="password" name="password" id="password" placeholder="请输入密码"></td>
</tr>
<tr>
<td class="td_left"><label for="email">Email</label></td>
<td class="td_right"><input type="email" name="email" id="email" placeholder="请输入邮箱"></td>
</tr>
<tr>
<td class="td_left"><label for="name">姓名</label></td>
<td class="td_right"><input type="text" name="name" id="name" placeholder="请输入姓名"></td>
</tr>
<tr>
<td class="td_left"><label for="tel">手机号</label></td>
<td class="td_right"><input type="text" name="tel" id="tel" placeholder="请输入手机号"></td>
</tr>
<tr>
<td class="td_left"><label>性别</label></td>
<td class="td_right">
<input type="radio" name="gender" value="male"> 男
<input type="radio" name="gender" value="female"> 女
</td>
</tr>
<tr>
<td class="td_left"><label for="birthday">出生日期</label></td>
<td class="td_right"><input type="date" name="birthday" id="birthday" placeholder="请输入出生日期"></td>
</tr>
<tr>
<td class="td_left"><label for="checkcode" >验证码</label></td>
<td class="td_right"><input type="text" name="checkcode" id="checkcode" placeholder="请输入验证码">
<img src="../img/5706105.png" id="img_check">
</td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="注册" id="btn_sub"></td>
</tr>
</table>
</form>
</div>
</div>
<div class="rg_right">
<p>已有账号?<a href="#">立即登录</a></p>
</div>
</div>
</body>
</html>
标签：right,盒子,float,height,width,left,border,CSS,页面 From： https://www.cnblogs.com/hungui/p/16899870.html