CSS3网页常见动态效果……

一、动态背景变色，且有晃动效果

html代码：

<span class="shake">弹</span>

CSS代码：

.shake{
    width:40px;
    height:40px;
    display:block;
    background:lightgreen;
    border-radius:50%;
    margin:5px;
    color:#fff;
    font-size:24px;
    text-align:center;
    line-height:40px;
    cursor:pointer;
    -webkit-transition:all 0.25s;
}
.shake:hover{
    -webkit-animation:shake 0.25s;
    background: lightblue;
}
@-webkit-keyframes shake{
    0%,10%,55%,90%,94%,98%,100%{
        -webkit-transform:scale(1,1);
    }
    30%{
        -webkit-transform:scale(1.14,0.86);
    }
    75%{
        -webkit-transform:scale(0.92,1.08);
    }
    92%{
        -webkit-transform:scale(1.04,0.96);
    }
    96%{
        -webkit-transform:scale(1.02,0.98);
    }
    99%{
        -webkit-transform:scale(1.01,0.99);
    }
}

二、输入框伸缩

html代码：

<input class="search" type="text" placeholder="搜索...">

CSS代码：

.search{
    width:80px;
    height:40px;
    border-radius:40px;
    border:2px solid lightblue;
    position: absolute;
    right:200px;
    outline:none;
    text-indent:12px;
    color:#666;
    font-size:16px;
    padding:0;
    -webkit-transition:width 0.5s;
}
.search:focus{
    width:200px;
}

三、按钮旁边，动态的提示

html代码：

<div class="banner1">
    <a href="javascript:;">博</a>
    <span>这是我的个人博客</span>
</div>

CSS代码：

.banner1{
    width:234px;
    height:34px;
    border-radius:40px;
    position:absolute;
    top:400px;
    left:600px;
}
.banner1 a{
    display:inline-block;
    width:30px;
    height:30px;
    line-height:30px;
    border-radius:50%;
    border:2px solid lightblue;
    position:absolute;
    left:0px;top:0px;
    background:lightgreen;
    color:#fff;
    text-align:center;
    text-decoration:none;
    cursor:pointer;
    z-index:2;
}
.banner1 a:hover + span{
    -webkit-transform:translateX(40px);
    opacity:1;
}
.banner1 span{
    display:inline-block;
    width:auto;
    padding:0 20px;
    height:30px;line-height:30px;
    background:lightblue;
    border-radius:30px;
    text-align: center;
    color:#fff;
    position:absolute;
    top:2px;
    opacity:0;
    -webkit-transition:all 1s;
    -webkit-transform:translateX(80px);
}

四、文字环绕效果

HTML结构：

<div class="wrapper">
    <div class="round">
        <span>东邪</span>
        <span>西毒</span>
        <span>南乞</span>
        <span>北丐</span>
    </div>
</div>

CSS结构：

.wrapper{
    width:100px;
    height:100px;
    background:lightblue;
    border-radius:50%;
    border:2px solid lightgreen;
    position: absolute;
    top:200px;
    left:400px;
    cursor:pointer;
}
.wrapper:after{
    content:你猜;
    display:inline-block;
    width:100px;
    height:100px;
    line-height:100px;
    border-radius:50%;
    text-align:center;
    color:#fff;
    font-size:24px;
}
.wrapper:hover .round{
    -webkit-transform:scale(1);
    opacity:1;
    -webkit-animation:rotating 6s 1.2s linear infinite alternate;
}
@-webkit-keyframes rotating{
    0%{
        -webkit-transform:rotate(0deg);
    }
    100%{
        -webkit-transform:rotate(180deg);
    }
}
.round{
    width:240px;
    height:240px;
    border:2px solid lightgreen;
    border-radius:50%;
    position: absolute;
    top:-70px;
    left:-70px;
    -webkit-transition:all 1s;
    -webkit-transform:scale(0.35);
    opacity:0;
}
.round span{
    width:40px;
    height:40px;
    line-height:40px;
    display:inline-block;
    border-radius:50%;
    background:lightblue;
    border:2px solid lightgreen;
    color:#fff;
    text-align:center;
    position:absolute;
}
.round span:nth-child(1){
    right:-22px;
    top:50%;
    margin-top:-22px;
}
.round span:nth-child(2){
    left:-22px;
    top:50%;
    margin-top:-22px;
}
.round span:nth-child(3){
    left:50%;
    bottom:-22px;
    margin-left:-22px;
}
.round span:nth-child(4){
    left:50%;
    top:-22px;
    margin-left:-22px;
}