CSS3 圆环状进度条

HTML：

<div class="wrap">

    <div class="progress-radial progress-25">
        <div class="overlay">25%</div>
    </div>

    <div class="progress-radial progress-50">
        <div class="overlay">50%</div>
    </div>

    <div class="progress-radial progress-75">
        <div class="overlay">75%</div>
    </div>

    <div class="progress-radial progress-90">
        <div class="overlay">90%</div>
    </div>

</div>

CSS：

@import url(http://fonts.googleapis.com/css?family=Noto+Sans);
body {
    padding: 30px 0;
    background-color: #2f3439;
    font-family: "Noto Sans", sans-serif;
}
.wrap {
    width: 600px;
    margin: 0 auto;
    /* -------------------------------------
 * Bar container
 * ------------------------------------- */
}
.progress-radial {
    float: left;
    margin-right: 30px;
    position: relative;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 2px solid #2f3439;
    background-color: tomato;
    /* -------------------------------------
 * Optional centered circle w/text
 * ------------------------------------- */
}
.progress-radial .overlay {
    position: absolute;
    width: 60px;
    height: 60px;
    background-color: #fffde8;
    border-radius: 50%;
    margin-left: 20px;
    margin-top: 20px;
    text-align: center;
    line-height: 60px;
    font-size: 16px;
    /* -------------------------------------
 * Mixin for progress-% class
 * ------------------------------------- */
}
.progress-0 {
    background-image: linear-gradient(90deg, #2f3439 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(90deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-5 {
    background-image: linear-gradient(90deg, #2f3439 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(108deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-10 {
    background-image: linear-gradient(90deg, #2f3439 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(126deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-15 {
    background-image: linear-gradient(90deg, #2f3439 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(144deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-20 {
    background-image: linear-gradient(90deg, #2f3439 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(162deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-25 {
    background-image: linear-gradient(90deg, #2f3439 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(180deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-30 {
    background-image: linear-gradient(90deg, #2f3439 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(198deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-35 {
    background-image: linear-gradient(90deg, #2f3439 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(216deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-40 {
    background-image: linear-gradient(90deg, #2f3439 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(234deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-45 {
    background-image: linear-gradient(90deg, #2f3439 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(252deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-50 {
    background-image: linear-gradient(-90deg, #ff6347 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(270deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-55 {
    background-image: linear-gradient(-72deg, #ff6347 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(270deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-60 {
    background-image: linear-gradient(-54deg, #ff6347 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(270deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-65 {
    background-image: linear-gradient(-36deg, #ff6347 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(270deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-70 {
    background-image: linear-gradient(-18deg, #ff6347 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(270deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-75 {
    background-image: linear-gradient(0deg, #ff6347 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(270deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-80 {
    background-image: linear-gradient(18deg, #ff6347 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(270deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-85 {
    background-image: linear-gradient(36deg, #ff6347 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(270deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-90 {
    background-image: linear-gradient(54deg, #ff6347 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(270deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-95 {
    background-image: linear-gradient(72deg, #ff6347 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(270deg, #ff6347 50%, #2f3439 50%, #2f3439);
}
.progress-100 {
    background-image: linear-gradient(90deg, #ff6347 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(270deg, #ff6347 50%, #2f3439 50%, #2f3439);
}