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响应式框架Bootstrap栅格系统
bootstrap
Bootstrap 是一个用于快速开发 Web 应用程序和网站的前端框架。Bootstrap 是基于 HTML、CSS、JAVASCRIPT 的。
Bootstrap 提供了一些辅助类,以便更快地实现对移动设备友好的开发。这些可以通过媒体查询结合大型、小型和中型设备,实现内容对设备的显示和隐藏。
row 行,
-md 桌面显示器
-ms 平板显示器
-xs 手机显示器
1行有12列
<div class= "row">
  <div class = "col-md-12"></div>
<div class = "col-ms-12"></div>
<div class = "col-xs-12"></div> //表示一行中有12列
</div>


<!
DOCTYPE html> <html> <head lang="en">     <meta charset="UTF-8">     <title></title>     <meta name="viewport" content="width=device-width, initial-scale=1">     <link rel="stylesheet" href="css/bootstrap.min.css"/>     <script language="JavaScript" src="js/jquery-3.js"></script>     <style type="text/css">         *{             top: 0px;             padding: 0px;             text-decoration: none;             list-style-type: none;         }         .top-styl{             height: 50px;             border: 1px solid red;             background-color: #000000;         }         .img-styl{             width: 174px;             height: 50px;             background: url("imges/logo.png")no-repeat 0px 3px;             background-size: contain;             float: left;         }         .sousuo-styl{             width: 187px;             float: left;         }         .top-search-input{             width: 150px;             padding: 0 5px;             height: 30px;             border: 0;             background: #363636;             float: left;             color: #ccc;         }         .top-search-submit{             width: 30px;             height: 30px;             border: 0;             background:  green url("imges/zoom.gif")center center no-repeat;             float: left;             cursor: pointer;          //光标指针         }         .dao-styll{             float: left;             font-size: 16px;             width: 329px;             margin-left: 33px;             margin-top: 11px;         }         .dao-styll li{             float: left;             position: relative;      //相对定位             text-align: center;      //居中             padding: 0 7px;         }         .dao-styll >li:hover{             background-color: #999;         }         .dao-styll >li >a{             color: #FFF;             width: 100%;             height: 34px;             text-decoration: none;    //取消下划线         }         .dz-styl{             float: right;             margin: -19px -9px 6px 21px;         }         .imgs-styl{             padding: 11px 0px 0px 114px;             float: right;             margin: 0px -98px -3px 8px;         }         .green-styl{             color: green;         }         .zc-styl{             color: white;         }         a{             text-decoration: none;         }     </style> </head> <body>     <div class="container-fluid">             //fluid表示用 百分比         <div class="row">               //row  行             <div class="top-styl col-md-12">        //col-md-12 每行桌面占12列                 <div class="row">                     <div class=" col-md-offset-1 col-md-9">   //col-md-offset-1 列偏移1列                         <div class="row">                         <div class="col-md-3 col-xs-4">                             <div class="img-styl"></div>                         </div>                             <div class="col-md-3 ">                                 <div class="sousuo-styl" style="padding-left: 7px; margin: 8px auto;">                                     <input class="top-search-input" value="" type="text"><input                                         class="top-search-submit" type="submit" value="" />                                 </div>                             </div>                             <div class="col-md-4 hidden-xs" style="padding: 0px">                                 <ul class="dao-styll">                                     <li class=""><a href="#">风格</a>                                     </li>                                     <li class=""><a href="#">造型师</a></li>                                     <li class=""><a href="#">众分享</a>                                     </li>                                     <li class=""><a href="#">我的美丽衣橱</a></li>                                 </ul>                             </div>                             <div class="col-md-2">                                 <div class="imgs-styl">                                     <img src="imges/sina.gif">                                 </div>                                 <div class="dz-styl">                                     <span><a href="#" class="green-styl">登录</a>&nbsp;|&nbsp;</span><span>                                     <a href="#" class="zc-styl">注册</a></span>                                 </div>                             </div>                         </div>                     </div>                 </div>             </div>         </div>    <div class="row">                 <div class="visible-md"><h1>当前为桌面显示</h1></div>   //visible默认占满整行                  <div class="visible-sm"><h1>当前为平面显示</h1></div>                 <div class="visible-xs"><h1>当前为手机显示</h1></div>         </div>     </div> </body> </html

 

 

效果显示图: