CSS3 box-shadow 效果大全（内阴影，外阴影，三边阴影，双边阴影，单边阴影，细线描边…）

Dear 丶 2022-09-02 12:52 442阅读 0赞

![复制代码][48304ba5e6f9fe08f3fa1abda7d326ab.png]

![803b40bc9f7e52540ff41379142db840.png][]

取值说明：

*  `inset`: 默认阴影在边框外。使用 inset 后，阴影在边框内（即使是透明边框），背景之上内容之下。也有些人喜欢把这个值放在最后，浏览器也支持。
 *  `<offset-x> <offset-y>`: 这是头两个 `<length>`值，用来设置阴影偏移量。`<offset-x>` 设置水平偏移量，如果是负值则阴影位于元素左边。 `<offset-y>` 设置垂直偏移量，如果是负值则阴影位于元素上面。可用单位请查看 `<length>`。如果两者都是0，那么阴影位于元素后面。这时如果设置了 `<blur-radius>` 或 `<spread-radius>` 则有模糊效果。
 *  `<blur-radius>`: 这是第三个 `<length>` 值。值越大，模糊面积越大，阴影就越大越淡。 不能为负值。默认为0，此时阴影边缘锐利。
 *  `<spread-radius>` : 这是第四个 `<length>` 值。取正值时，阴影扩大；取负值时，阴影收缩。默认为0，此时阴影与元素同样大。
 *  `<color>` : 相关事项查看 `<color>` 。如果没有指定，则由浏览器决定——通常是color的值，不过目前Safari取透明。

![636b53776d72eab61c4f50489ee8f8cc.png][]

![003d6955b7a4cf10aa609134edf0efc1.png][]

![38b34403bbb9d05942be52cbc1418d90.png][]

举栗子~~~

.box {background-color: #CCCCCC; border-radius:10px; width: 200px; height: 200px;}
    .boxshadow1{ box-shadow:inset 0px 0px 5px 1px #000; }/* 内部阴影 */
    .boxshadow2{ box-shadow:inset 0 1px 2px 1px #000; }/* 3边内影示例 */
    .boxshadow3{box-shadow:0 0 10px #000;}/* 外阴影示例 */
    .boxshadow4{box-shadow:2px 2px 5px #000;}/* 右下外阴影示例 */
    .boxshadow5{box-shadow:0 0 5px 15px #000;}/* 扩大阴影示例 */
    .boxshadow6{box-shadow: 12px 12px 2px 1px rgba(0, 0, 255, .2);}/* 半透明阴影色示例 */

**效果：**

![2a04b5dfc91ce90486c5237856105eb6.png][]

### 单边阴影效果 ###

.box {  background-color: #CCCCCC;  width: 200px; height: 200px;}
    .boxshadow1{ box-shadow:inset 0px 15px 10px -15px #000; }/* 上边内阴影示例 */
    .boxshadow2{ box-shadow:inset -15px 0px  10px -15px #000;}/* 右边内阴影示例 */
    .boxshadow3{box-shadow:0px 12px 8px -12px #000; border-radius:10px;}/* 下边外阴影示例 */
    .boxshadow4{box-shadow:3px 0 8px -4px #000;}/* 右边外阴影示例 */
    .boxshadow5{ box-shadow: inset 0px -1px 0px 0px rgb(0, 0, 0);}/* 下边细线示例 */

效果：

![4ef3a458ab5945327f38555780e1da11.png][]

### 双边边阴影及多重阴影效果 ###

.box {  background-color: #CCCCCC;  width: 100px; height: 100px;}
    .boxshadow1{ 
      box-shadow:inset 0px 15px 15px -15px #000,
                 inset 0px -15px 15px -15px #000; 
    }/* 上下边内阴影示例 */
    .boxshadow2{ 
      box-shadow:15px 0 15px -15px #000,
                 -15px 0 15px -15px #000;
    }/* 左右边外阴影示例 */
    .boxshadow3{ border-radius:10px; 
      box-shadow:0px 0px 0px 3px #bb0a0a,
                 0px 0px 0px 6px #2e56bf,
                 0px 0px 0px 9px #ea982e;
    }/* 多层阴影示例 */

效果:

![e75202b93e2088aaa84d56a16cc68de6.png][]

### 其他一些有意思的阴影： ###

使用伪元素::before和::after，我们能创造出非常逼真的只有图片才能实现的阴影效果。

<!DOCTYPE html>
    <html>
        <head>
            <meta charset="utf-8">
            <title></title>
        </head>
        <style type="text/css">
            .box11 {
                width: 300px;
                height: 100px;
                background: #ccc;
                border-radius: 10px;
                margin: 10px;
            }
    
            .shadow {
                position: relative;
                max-width: 270px;
                box-shadow: 0px 1px 4px rgba(0, 0, 0, 0.3),
                    0px 0px 20px rgba(0, 0, 0, 0.1) inset;
            }
    
            .shadow::before,
            .shadow::after {
                content: "";
                position: absolute;
                z-index: -1;
            }
    
            .shadow::before,
            .shadow::after {
                content: "";
                position: absolute;
                z-index: -1;
                bottom: 15px;
                left: 10px;
                width: 50%;
                height: 20%;
            }
    
            .shadow::before,
            .shadow::after {
                content: "";
                position: absolute;
                z-index: -1;
                bottom: 15px;
                left: 10px;
                width: 50%;
                height: 20%;
                box-shadow: 0 15px 10px rgba(0, 0, 0, 0.7);
                transform: rotate(-3deg);
            }
    
            .shadow::after {
                right: 10px;
                left: auto;
                transform: rotate(3deg);
            }
        </style>
        <body>
            <div class="box11 shadow"></div>
        </body>
    </html>

效果：

![2de0c414fd53e013ae09bc56369d88b0.png][]

<!DOCTYPE html>
    <html>
        <head>
            <meta charset="utf-8">
            <title></title>
        </head>
        <style type="text/css">
            body {
                background: #E6EEF6;
            }
    
            .wrap {
                margin-left: 20px;
            }
    
            .box {
                width: 40%;
                height: 200px;
                float: left;
                background-color: white;
                margin: 25px 15px;
                border-radius: 5px;
            }
    
            .box h3 {
                font-family: 'Didact Gothic', sans-serif;
                font-weight: normal;
                text-align: center;
                padding-top: 60px;
                color: #fff;
            }
    
            .box1 {
                background-color: #EBA39E;
            }
    
            .box2 {
                background-color: #EDE89A;
            }
    
            .box3 {
                background-color: #9EEBA1;
            }
    
            .box4 {
                background-color: #9EEBBF;
            }
    
            .box5 {
                background-color: #9ED9EB;
            }
    
            .box6 {
                background-color: #9EB3EB;
            }
    
            .box7 {
                background-color: #DB9EEB;
            }
    
            .box8 {
                background-color: #C49EEB;
            }
    
            .shadow1,
            .shadow2,
            .shadow3,
            .shadow4,
            .shadow5,
            .shadow6,
            .shadow7,
            .shadow8 {
                position: relative;
            }
    
            .shadow1,
            .shadow2,
            .shadow3,
            .shadow4,
            .shadow5,
            .shadow6,
            .shadow7,
            .shadow8 {
                box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 20px rgba(0, 0, 0, 0.1) inset;
            }
    
            /*****************************************************************dashed border
    ****************************************************************/
            .shadow1 h3,
            .shadow2 h3,
            .shadow3 h3,
            .shadow4 h3,
            .shadow5 h3,
            .shadow6 h3,
            .shadow7 h3,
            .shadow8 h3 {
                width: 87%;
                height: 100px;
                margin-left: 6%;
                border: 2px dashed #F7EEEE;
                border-radius: 5px;
            }
    
            /****************************************************************
    *styling shadows
    ****************************************************************/
            .shadow1:before,
            .shadow1:after {
                position: absolute;
                content: "";
                bottom: 12px;
                left: 15px;
                top: 80%;
                width: 45%;
                background: #9B7468;
                z-index: -1;
                -webkit-box-shadow: 0 20px 15px #9B7468;
                -moz-box-shadow: 0 20px 15px #9B7468;
                box-shadow: 0 20px 15px #9B7468;
                -webkit-transform: rotate(-6deg);
                -moz-transform: rotate(-6deg);
                transform: rotate(-6deg);
            }
    
            .shadow1:after {
                -webkit-transform: rotate(6deg);
                -moz-transform: rotate(6deg);
                transform: rotate(6deg);
                right: 15px;
                left: auto;
            }
    
            .shadow2:before {
                position: absolute;
                content: "";
                width: 80%;
                top: 140px;
                bottom: 15px;
                left: 30px;
                background-color: #9F8641;
                z-index: -1;
                -webkit-box-shadow: 0 23px 17px 0 #9F8641;
                -moz-box-shadow: 0 23px 17px 0 #9F8641;
                box-shadow: 0 23px 17px 0 #9F8641;
                -webkit-transform: rotate(-4deg);
                -moz-transform: rotate(-4deg);
                transform: rotate(-4deg);
            }
    
            .shadow3:before,
            .shadow3:after {
                content: "";
                position: absolute;
                bottom: 0;
                top: 2px;
                left: 15px;
                right: 15px;
                z-index: -1;
                border-radius: 100px/30px;
                -webkit-box-shadow: 0 0 30px 2px #479F41;
                -moz-box-shadow: 0 0 30px 2px #479F41;
                box-shadow: 0 0 30px 2px #479F41;
            }
    
            .shadow4:before,
            .shadow4:after {
                position: absolute;
                content: "";
                top: 14px;
                bottom: 14px;
                left: 0;
                right: 0;
                box-shadow: 0 0 25px 3px #548E7F;
                border-radius: 100px/10px;
                z-index: -1;
            }
    
            .shadow5:before,
            .shadow5:after {
                position: absolute;
                content: "";
                box-shadow: 0 10px 25px 20px #518C96;
                top: 40px;
                left: 10px;
                bottom: 50px;
                width: 15%;
                z-index: -1;
                -webkit-transform: rotate(-8deg);
                -moz-transform: rotate(-8deg);
                transform: rotate(-8deg);
            }
    
            .shadow5:after {
                -webkit-transform: rotate(8deg);
                -moz-transform: rotate(8deg);
                transform: rotate(8deg);
                right: 10px;
                left: auto;
            }
    
            .shadow6:before,
            .shadow6:after {
                position: absolute;
                content: "";
                top: 100px;
                bottom: 5px;
                left: 30px;
                right: 30px;
                z-index: -1;
                box-shadow: 0 0 40px 13px #486685;
                border-radius: 100px/20px;
            }
    
            .shadow7:before,
            .shadow7:after {
                position: absolute;
                content: "1";
                top: 25px;
                left: 20px;
                bottom: 150px;
                width: 80%;
                z-index: -1;
                -webkit-transform: rotate(-6deg);
                -moz-transform: rotate(-6deg);
                transform: rotate(-6deg);
            }
    
            .shadow7:before {
                box-shadow: 10px -10px 30px 15px #984D8E;
            }
    
            .shadow7:after {
                -webkit-transform: rotate(7deg);
                -moz-transform: rotate(7deg);
                transform: rotate(7deg);
                bottom: 25px;
                top: auto;
                box-shadow: 10px 10px 30px 15px #984D8E;
            }
    
            .shadow8 {
                box-shadow:
                    -6px -6px 8px -4px rgba(250, 254, 118, 0.75),
                    6px -6px 8px -4px rgba(254, 159, 50, 0.75),
                    6px 6px 8px -4px rgba(255, 255, 0, 0.75),
                    6px 6px 8px -4px rgba(0, 0, 255, 2.75);
            }
        </style>
        <body>
    
            <div class="wrap">
                <div class="box box1 shadow1">
                    <h3>Shadow 1</h3>
                </div>
                <div class="box box2 shadow2">
                    <h3>Shadow 2</h3>
                </div>
                <div class="box box3 shadow3">
                    <h3>Shadow 3</h3>
                </div>
                <div class="box box4 shadow4">
                    <h3>Shadow 4</h3>
                </div>
                <div class="box box5 shadow5">
                    <h3>Shadow 5</h3>
                </div>
                <div class="box box6 shadow6">
                    <h3>Shadow 6</h3>
                </div>
                <div class="box box7 shadow7">
                    <h3>Shadow 7</h3>
                </div>
                <div class="box box8 shadow8">
                    <h3>Shadow 8</h3>
                </div>
            </div>
        </body>
    </html>

效果：

![07422968a0841d71d5e10a3cad887fbd.png][]

[48304ba5e6f9fe08f3fa1abda7d326ab.png]: /images/20220829/6c757b155884424a814bf46914a19019.png
[803b40bc9f7e52540ff41379142db840.png]: /images/20220829/59dfb567db5a4f438dfd1cf7d845bc1f.png
[636b53776d72eab61c4f50489ee8f8cc.png]: /images/20220829/778eb23c78804ab99488add95203ffbc.png
[003d6955b7a4cf10aa609134edf0efc1.png]: /images/20220829/026dba9e2358446ea1a8323011373f0d.png
[38b34403bbb9d05942be52cbc1418d90.png]: /images/20220829/fcbb6826f0f24fd7abaeefb261a64645.png
[2a04b5dfc91ce90486c5237856105eb6.png]: /images/20220829/8e5308be5cd3410aa15f70fbc8b4ceb6.png
[4ef3a458ab5945327f38555780e1da11.png]: /images/20220829/691358602d20462694038de4119bba99.png
[e75202b93e2088aaa84d56a16cc68de6.png]: /images/20220829/b697794d52f94d19b889f9375bdf4a70.png
[2de0c414fd53e013ae09bc56369d88b0.png]: /images/20220829/2bb7a84d80414f8dbf2f1e45d06cf967.png
[07422968a0841d71d5e10a3cad887fbd.png]: /images/20220829/24c8228dce1f41258bd3c4930d28c237.png