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Initial application of Div Css_html/css_WEB-ITnose

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Jun 24, 2016 am 11:40 AM

Preliminary application of Div CSS

Websites using DIV CSS mode have the following advantages: 1. Separation of performance and content 2. Simple code to improve page browsing speed 3. Easy to maintain and revise 4 , Improve search engine indexing efficiency of web pages.

There are three types of CSS placed in HTML files: inline, embedded, and external.

I feel that Css must be clear about its six selectors: 1. HTML selector 2. Class selector 3. ID selector 4. Pseudo-element selector 5. Association selector 6. Combination selector .

Css contains six major categories of attributes: 1. Font attributes 2. Text attributes 3. Background attributes 4. Border attributes 5. Mouse attributes 6. List attributes.

The following examples:

<!DOCTYPE HTML>
<html>
<head>
    <meta charset="UTF-8">
    <title>定义栏目区块</title>
    <link rel="stylesheet" href="./style.css" />
</head>
<body>
<div id="wrapper">
    <div>
        <h3>
            <a>标题</a>
        </h3>
    </div>
    <div>
        <ul>
            <li><a href="">一个大光头</a></li>
            <li><a href="">二个大光头</a></li>
            <li><a href="">三个大光头</a></li>
            <li><a href="">四个大光头</a></li>
            <li><a href="">五个大光头</a></li>
            <li><a href="">六个大光头</a></li>
            <li><a href="">七个大光头</a></li>
            <li><a href="">八个大光头</a></li>
            <li><a href="">九个大光头</a></li>
            <li><a href="">十个大光头</a></li>
            <li><a href="">11个大光头</a></li>
            <li><a href="">12个大光头</a></li>
        </ul>
    </div>
    <div>
        <a href=""></a>
    </div>
</div>
</body>
</html>

css

body{
    text-align : center;
    font : 12px Arial,宋体；
}
#wrapper{
    margin : 0 auto;
    padding : 0px;
    width : 300px;
    text-align : left;
}
.title{
    font : left;
    width : 100%;
    height : 24px;
    background : url(./images/titbg.gif);
}
.title h3{
    margin : 0px;
    padding : 0px;
    line-height : 24px;
    font-size : 12px;
    text-indent : 30px;
    background : url(./images/tittb.gif) no-repeat 3% 50%;
}
.list{
    width : 298px !important;
    width : 300px; 

    float : left;
    border : 1px solid #d8d8d8;
    border-top : 0px;
}
.list ul {    float : left;
    list-style-type : none;
    margin :0px;
    padding : 0px;
}
.list ul li {    float : left;
   line-height : 20px;
    margin : 0px 5px;
    width : 45%;
    background : url(./images/sidebottom.gif) repeat-x 50% bottom;
}
.list ul li a{
    padding-left : 12px;
    background : url(./images/bullet.gif) no-repeat 0 50%}
.one{
    height : 5px;
    width : 100%;    float : left;
    overflow : hidden
}
a:link, a:visited{
    text-decoration : none;
    color : green;
}
a:hover{
    position : relative;
    top : 1px;
    left : 1px;
    text-decoration : underline;
    color : black;
}

Rendering

Initial application of Div Css_html/css_WEB-ITnose

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