美化网站的实用 CSS3 技巧

黑白图像

.desaturate {
    filter: grayscale(100%);
    -webkit-filter: grayscale(100%);
    -moz-filter: grayscale(100%);
    -ms-filter: grayscale(100%);
    -o-filter: grayscale(100%);
}

页面顶部阴影

::before {
    content: "";
    position: fixed;
    top: -10px;
    left: 0;
    width: 100%;
    height: 10px;
    -webkit-box-shadow: 0px 0px 10px rgba(0, 0, 0, .8);
    -moz-box-shadow: 0px 0px 10px rgba(0, 0, 0, .8);
    box-shadow: 0px 0px 10px rgba(0, 0, 0, .8);
    z-index: 100;
}

CSS 实现三角形

.arrow-up {
    width: 0px;
    height: 0px;
    border-left: 5px solid transparent;
    /* left arrow slant */
    border-right: 5px solid transparent;
    /* right arrow slant */
    border-bottom: 5px solid #2f2f2f;
    /* bottom, add background color here */
    font-size: 0px;
    line-height: 0px;
}

/* create an arrow that points down */
.arrow-down {
    width: 0px;
    height: 0px;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid #2f2f2f;
    font-size: 0px;
    line-height: 0px;
}

/* create an arrow that points left */
.arrow-left {
    width: 0px;
    height: 0px;
    border-bottom: 5px solid transparent;
    /* left arrow slant */
    border-top: 5px solid transparent;
    /* right arrow slant */
    border-right: 5px solid #2f2f2f;
    /* bottom, add background color here */
    font-size: 0px;
    line-height: 0px;
}

/* create an arrow that points right */
.arrow-right {
    width: 0px;
    height: 0px;
    border-bottom: 5px solid transparent;
    /* left arrow slant */
    border-top: 5px solid transparent;
    /* right arrow slant */
    border-left: 5px solid #2f2f2f;
    /* bottom, add background color here */
    font-size: 0px;
    line-height: 0px;
}

文字渐变

h1[data-text] {
    position: relative;
    color: #f51010;
}

h1[data-text]::after {
    content: attr(data-text);
    z-index: 10;
    color: #f9fd04;
    position: absolute;
    top: 0;
    left: 0;
    -webkit-mask-image: -webkit-gradient(linear, left top, left bottom, from(rgba(0, 0, 0, 0)), color-stop(50%, rgba(0, 0, 0, 1)), to(rgba(0, 0, 0, 0)));
}

盒子虚线边框效果

.box {
    padding: 5px 10px;
    margin: 10px;
    background: #ff0030;
    color: #fff;
    font-size: 21px;
    line-height: 1.3em;
    border: 2px dashed #fff;
    border-radius: 3px;
    -moz-border-radius: 3px;
    -webkit-border-radius: 3px;
    -moz-box-shadow: 0 0 0 4px #ff0030, 2px 1px 4px 4px rgba(10, 10, 0, .5);
    -webkit-box-shadow: 0 0 0 4px #ff0030, 2px 1px 4px 4px rgba(10, 10, 0, .5);
    box-shadow: 0 0 0 4px #ff0030, 2px 1px 6px 4px rgba(10, 10, 0, .5);
    text-shadow: -1px -1px #aa3030;
}

.bg-yellow {		/**黄色**/
    background: #eccc30;
    box-shadow: 0 0 0 4px #eccc30, 2px 1px 6px 4px rgba(10, 10, 0, .5);
    -moz-box-shadow: 0 0 0 4px #eccc30, 2px 1px 4px 4px rgba(10, 10, 0, .5);
    -webkit-box-shadow: 0 0 0 4px #eccc30, 2px 1px 4px 4px rgba(10, 10, 0, .5);
}

模糊文本

.blur {
    color: rgba(0, 0, 0, 0);
    text-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
}

右上角标签

.wrapper {
    margin: 50px auto;
    width: 280px;
    height: 370px;
    background: white;
    border-radius: 10px;
    -webkit-box-shadow: 0px 0px 8px rgba(0, 0, 0, 0.3);
    -moz-box-shadow: 0px 0px 8px rgba(0, 0, 0, 0.3);
    box-shadow: 0px 0px 8px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 90;
}

.ribbon-wrapper-green {
    width: 85px;
    height: 88px;
    overflow: hidden;
    position: absolute;
    top: -3px;
    right: -3px;
}

.ribbon-green {
    font: bold 15px Sans-Serif;
    color: #333;
    text-align: center;
    text-shadow: rgba(255, 255, 255, 0.5) 0px 1px 0px;
    -webkit-transform: rotate(45deg);
    -moz-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    position: relative;
    padding: 7px 0;
    left: -5px;
    top: 15px;
    width: 120px;
    background-color: #BFDC7A;
    background-image: -webkit-gradient(linear, left top, left bottom, from(#BFDC7A), to(#8EBF45));
    background-image: -webkit-linear-gradient(top, #BFDC7A, #8EBF45);
    background-image: -moz-linear-gradient(top, #BFDC7A, #8EBF45);
    background-image: -ms-linear-gradient(top, #BFDC7A, #8EBF45);
    background-image: -o-linear-gradient(top, #BFDC7A, #8EBF45);
    color: #6a6340;
    -webkit-box-shadow: 0px 0px 3px rgba(0, 0, 0, 0.3);
    -moz-box-shadow: 0px 0px 3px rgba(0, 0, 0, 0.3);
    box-shadow: 0px 0px 3px rgba(0, 0, 0, 0.3);
}

.ribbon-green:before,
.ribbon-green:after {
    content: "";
    border-top: 3px solid #6e8900;
    border-left: 3px solid transparent;
    border-right: 3px solid transparent;
    position: absolute;
    bottom: -3px;
}

.ribbon-green:before {
    left: 0;
}

.ribbon-green:after {
    right: 0;
}

<div class="wrapper">
    <div class="ribbon-wrapper-green">
        <div class="ribbon-green">推荐</div>
    </div>
</div>