如何用CSS3制作一个漂亮的登录框_html/css

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如何用CSS3制作一个漂亮的登录框_html/css_WEB-ITnose

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Jun 21, 2016 am 08:48 AM

DEMO

漂亮的登录框

作为一个新手，个人觉得难点在：1.阴影的使用（外框，账户栏，密码栏，button）2.账户栏，密码栏的布局3.button颜色渐变下面给出一些思路，也希望大家提供一些简洁的方法帮助更多的新手。

HTML 代码如下：

<body>    <div class="wrapper">        <div class="header">Login to <span>love.ly</span></div>        <form action="" method="post">            <ul>                <li>                    <div class="text">                        <span class="yonghu"></span><input type="text" placeholder="IconDeposit">                    </div>                </li>                <li>                    <div class="password">                        <span class="mima"></span><input type="password" placeholder="••••••••••••••">                    </div>                </li>                <li class="remember">                    <input type="checkbox">Remember Me                </li>                <li>                    <a href="">Forgot username or password?</a>                </li>                <li>                    <input type="button" value="Login">                </li>            </ul>        </form>        <div class="footer">            <p>Love.ly Personal Blog .PSD Template <a href="">Copyright &copy;2012 Matt Gentile</a></p>            <p><a href="">Love.ly Home</a> | <a href="">Bolg            </a> | <a href="">Work</a> | <a href="">Terms of Use</a> | <a href="">Contact Me</a></p>        </div>    </div></body>

背景框样式：

背景

  form{        background: #cccccc;        width: 260px;        height: 260px;        margin: 35px auto;        padding: 30px;        box-shadow:0px 1px 2px 1px #aaaaaa,                   inset 0px 1px 1px rgba(255,255,255,0.7);        border-radius: 3px;    }

box-shadow语法：

E {box-shadow: <length> <length> <length>?<length>?||<color>}也就是：E {box-shadow:inset x-offset y-offset blur-radius spread-radius color}换句说：对象选择器 {box-shadow:投影方式 X轴偏移量 Y轴偏移量 阴影模糊半径 阴影扩展半径 阴影颜色}

box-shadow取值：阴影类型：此参数是一个可选值，如果不设值，其默认的投影方式是外阴影；如果取其唯一值“inset”,就是将外阴影变成内阴影，也就是说设置阴影类型为“inset”时，其投影就是内阴影；X-offset:是指阴影水平偏移量其值可以是正负值可以取正负值，如果值为正值，则阴影在对象的右边，反之其值为负值时，阴影在对象的左边；Y-offset:是指阴影的垂直偏移量，其值也可以是正负值，如果为正值，阴影在对象的底部，反之其值为负值时，阴影在对象的顶部；阴影模糊半径：此参数是可选，，但其值只能是为正值，如果其值为0时，表示阴影不具有模糊效果，其值越大阴影的边缘就越模糊；阴影扩展半径：此参数可选，其值可以是正负值，如果值为正，则整个阴影都延展扩大，反之值为负值是，则缩小阴影颜色：此参数可选，如果不设定任何颜色时，浏览器会取默认色，但各浏览器默认色不一样，特别是在webkit内核下的safari和chrome浏览器将无色，也就是透明，建议不要省略此参数。

账户栏，密码栏的布局：

用户栏、密码栏

账户栏，密码栏的阴影同上面的背景框的做法，就不多解释了，难点主要在如何在focus这两个input的时候如何改变整个账户栏，密码栏背景颜色。因为我们在focus的时候账户栏，密码栏中前面的小图标不能消失，所以我们用一个span标签将icon放置到input标签前面。HTML代码如下：

<li>    <div class="text">        <span class="yonghu"></span><input type="text" placeholder="IconDeposit">    </div></li><li>    <div class="password">        <span class="mima"></span><input type="password" placeholder="••••••••••••••">    </div></li>

为了达到focus的效果我们需要把input的大小调整到和div.text同样大小，这时我们发现span标签会一直占据input前面的空间，这时我们需要span使用position:absolute使其脱离文档流，调整好icon的位置后，对input使用padding-left使placeholder，以及我们focus时输入的内容右移，然后整个input就充满了账户栏，密码栏。具体的CSS样式如下：

ul li div{    width: 260px;    height: 40px;    background: #e1dcd8;    color: rgb(98,94,91);    box-shadow: inset 0px 2px 5px #aaaaaa;    border-radius: 5px;    position: relative;}ul li .yonghu{    font-family: iconfont;    position: absolute;    top: 12px;    left: 10px;}ul li .mima{    font-family: iconfont;    position: absolute;    top: 12px;    left: 10px;}ul li div input{    height: 40px;    width: 190px;    padding: 0 35px;    border: none;    background: #e1dcd8;    color: rgb(98,94,91);    box-shadow:            0px 1px 1px rgba(255,255,255,0.7),            inset 0px 2px 5px #aaaaaa;    border-radius: 5px;}ul li input:focus{    outline: none;    background: #f5f2ef;}

button颜色渐变：

button

button:hover

button:active

我们需要先将将button的样式做出来，这里介绍一下CSS3的背景渐变属性linear-gradient：语法：

<linear-gradient>：linear-gradient([ <point>,]? <color-stop>[, <color-stop>]+);<point>：[ left | right ]? [ top | bottom ]? || <angle>?<color-stop>：<color> [ <length> | <percentage> ]?

取值：

left：设置左边为渐变起点的横坐标值。right：设置右边为渐变起点的横坐标值。top：设置顶部为渐变起点的纵坐标值。bottom：设置底部为渐变起点的纵坐标值。 <angle>：用角度值指定渐变的方向（或角度）。 <color-stop>：指定渐变的起止颜色。 <color>：指定颜色。请参阅颜色值 <length>：用长度值指定起止色位置。不允许负值 <percentage>：用百分比指定起止色位置。

这个取色是一个比较繁琐的过程，这里可以给大家推荐一款比较讨巧的方法，使用button生成器，制作好以后把代码复制过来就好了。然后加上hover，active样式我们的button就完成了。下面是button的CSS样式：

ul li input[type*="button"]{    width: 100%;    height: 40px;    font-family: Arial, Helvetica, sans-serif;    font-size: 18px;    color: #ffffff;    background: -moz-linear-gradient(            top,            #94aa64 0%,            #7a924a 50%,            #607738);    background: -webkit-gradient(            linear, left top, left bottom,            from(#94aa64),            color-stop(0.50, #7a924a),            to(#607738));    -moz-border-radius: 5px;    -webkit-border-radius: 5px;    border-radius: 5px;    border: 1px solid #7d8862;    -moz-box-shadow:            0px 1px 0px rgba(170,170,170,1),            inset 0px 1px 1px rgba(255,255,255,0.7);    -webkit-box-shadow:            0px 1px 0px rgba(170,170,170,1),            inset 0px 1px 1px rgba(255,255,255,0.7);    box-shadow:            0px 1px 0px rgba(170,170,170,1),            inset 0px 1px 1px rgba(255,255,255,0.7);    text-shadow:            0px -1px 0px rgba(000,000,000,0.3),            0px 0px 0px rgba(255,255,255,0);}ul li input[type*="button"]:hover{    opacity: 0.8;}ul li input[type*="button"]:active{    width: 100%;    height: 40px;    font-family: Arial, Helvetica, sans-serif;    font-size: 18px;    color: #ffffff;    background: -moz-linear-gradient(            top,            #607738 0%,            #7a924a 50%,            #94aa64 );    background: -webkit-gradient(            linear, left top, left bottom,            from(#607738),            color-stop(0.50, #7a924a),            to(#94aa64));    -moz-border-radius: 5px;    -webkit-border-radius: 5px;    border-radius: 5px;    border: 1px solid #7d8862;    -moz-box-shadow:            0px -1px 0px rgba(170,170,170,1),            inset 0px -1px 1px rgba(255,255,255,0.7);    -webkit-box-shadow:            0px -1px 0px rgba(170,170,170,1),            inset 0px -1px 1px rgba(255,255,255,0.7);    box-shadow:            0px -1px 0px rgba(170,170,170,1),            inset 0px -1px 1px rgba(255,255,255,0.7);    text-shadow:            0px 1px 0px rgba(000,000,000,0.3),            0px 0px 0px rgba(255,255,255,0);}

为了方便大家这里把整个DEMO的CSS链接给出：CSS。

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