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[免费发广告] css零基础自学教程(十)css3基础

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    慵懒
    2018-9-19 13:15
  • 签到天数: 16 天

    [LV.4]偶尔看看III

    发表于 2018-10-3 12:35:44 | 显示全部楼层 |阅读模式
    VYZqgj0gdBJ0j0GN.jpg

    一 css3透明

    css3中可以通过设置RGBA来实现透明效果.

    RGBA在RGB的基础上加入Alpha通道,通过设置Alpha值可以实现透明效果.

    rgba(255,255,255,0)

    R:红色值. 正整数或百分比

    G:绿色值. 正整数或百分比.

    B:蓝色值.正整数或百分比.

    A:透明度.取值0~1之间.

    html代码

    <nav>

    <ul>

    <li><a href="#">加油</a></li> <!--href="#"是链接本页的意思,会跳到页面开始的地方,但是不会刷新网页-->

    <li><a href="#">努力</a></li>

    <li><a href="#">奋斗</a></li>

    <li><a href="#">自强</a></li>

    </ul>

    </nav>

    css代码:

    nav ul{ background:linear-gradient(90deg,rgba(255,255,255,0)0%,rgba(255,255,255,0.2)25%,rgba(255,255,255,0.2)75%,rgba(255,255,255,0)100%);

    box-shadow:0 0 25px rgba(0,0,0,0.1),

    inset 0 0 1px rgba(255,255,255,0.6); }

    nav ul li{display:inline-block;}

    nav ul li a{padding:10px; color:#FFFFFF; font-size:18px; font-family:Arial; text-decoration:none; display:block;}

    运行效果如下:

    N0KbK00q00lTeOyw.jpg

    由于使用了display:inline-block;所以这个无序列表显示在了一行里面.如果去掉nav ul li{display:inline-block;},当然这行代码也可是写成 li{ display: inline-block; } li元素嵌套在nav元素和ul元素里面.

    效果如下:

    jpIoidbP3X3toONB.jpg

    二 css3文本阴影

    text-shadow属性定义一个或多个以逗号分隔的阴影效果,应用于当前元素的文本内容.

    text-shadow属性格式:text-shadow:x-offset(必需) y-offset(必需) blur(可选) color(可选);

    color值不是必需的,但由于文本阴影的默认值是透明的,除非指定颜色值,否则不会显示文本阴影.

    css代码:

    p.text-shadow{text-shadow:-10px 5px 5px red;font-size:20px; }

    效果如下:

    ak7aoepc4ca77I4a.jpg

    text-shadow属性可以通过","逗号分割同时创建的多个阴影.

    在css3中越先定义的阴影效果会被放置在越顶层(别的阴影的上面),反正则相反.

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    发表于 2019-9-26 20:50:01 | 显示全部楼层

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