050601课堂css3

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <style type="text/css">
            *{
                margin: 0 ;
                padding: 0;
            }
            #first{
                width: 200px;
                height: 200px;
                background-color: #000000;
                border-radius: 50%;
            }
            #second{
                width: 200px;
                height: 200px;
                border: 1px solid black;
                box-shadow: 5px 5px 5px grey;
            }
            #third{
                width: 300px;
                height: 300px;
                background-image: url(../img/1_shouye/icon_qyjsy.png);
                background-size: cover;* //100%  100%/
                background-repeat: no-repeat;  /* 背景图片不平铺*/
                padding-left: 20px;
                /*text-align: center;
                line-height: 300px;
                内容的区域,而不是文本的位置*/
                background-origin: content-box;    /*根据文本位置*/
            /*    background-origin: border-box;     根据边框位置*/
                
            }
            #forth{
                width: 200px;
                height: 200px;
                border: 1px solid red;
                background-image: url(../img/1_shouye/7_hkfl.png);
                background-repeat: no-repeat;
                background-position: 20px 20px;
            }
            #fifth{
                width: 200px;
                height: 200px;
                border: 1px solid red;
                background-image: url(../img/1_shouye/icon_qyryy.png),url(../img/1_shouye/3_jsdz.png),url(../img/1_shouye/6_ysbh.png);
                background-repeat: no-repeat;
            }
            #sixth{
                width: 200px;
                height: 50px;
                border: 1px solid red;
                /*text-align: center;
                line-height: 100px;*/
                text-shadow: 5px 5px 5px grey;
                overflow: hidden;    /*超出部分隐藏*/
                white-space: nowrap;  /*强制不换行*/
                text-overflow: "....";
            } 
            #seventh{
                width: 200px;
                height: 50px;
                border: 1px solid red;
                word-break: break-all;  /*全部换行,但会截断单词*/
                /*word-break: break-word; */ /* 全部换行,不会截断单词*/
            }
            #eighth{
                width: 200px;
                height: 50px;
                border: 1px solid red;
                color: orange;
                /*background-color: #000000;
                opacity: 0.5;*/     /*色渐变浅*/
                background-color: rgba(0,0,0,0.5);
            }
            #ninth{
                width: 200px;
                height: 100px;
                border: 1px solid red;
                color: orange;
                background-image: linear-gradient(to bottom,red,blue,black);
            }
            img:hover{
                cursor: pointer;  /*鼠标变小手*/
                border-radius: 50%;
                filter: sepia(100%);
            }
        </style>
    </head>
    <body>
        <div id="first">
            
        </div>
        <div id="second">
            
        </div>
        <div id="third">
            今天天气不错
            今天天气不错
            今天天气不错
        </div>
        
        <div id="forth">    
        </div>
        <div id="fifth">
            
        </div>
        <div id="sixth">
            习大大讲解马克思习大大讲解马克思习大大讲解马克思习大大讲解马克思习大大讲解马克思
        </div>
        <div id="seventh">
            there is an strange old man
        </div>
        <!----------透明度------------->
        <div id="eighth">
            今天你们吃啥
            今天你们吃啥
            今天你们吃啥
        </div>
        <div id="ninth">
            
        </div>
        <img src="../img/1_shouye/icon_qq.png" width="100" height="100"/>
    </body>
</html>
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