Untitled

    background-image: url(../img/tab-back-line.png);
    background-position: left bottom;
    background-repeat: repeat-x;
    background-image: -webkit-linear-gradient(bottom, #CCCCCC 0, rgba(255, 255, 255, 0) 2px, rgba(255, 255, 255, 0) 100%);
    background-image: -moz-linear-gradient(bottom, #CCCCCC 0, rgba(255,255,255,0) 2px, rgba(255,255,255,0) 100%);
    background-image: -webkit-gradient(linear, left bottom, left top, color-stop(0, #CCCCCC), color-stop(2px, rgba(255,255,255,0)), color-stop(1, rgba(255,255,255,0)));
    background-image: linear-gradient(bottom, #CCCCCC 0, rgba(255,255,255,0) 2px, rgba(255,255,255,0) 100%);
    overflow: hidden;
    margin: 0 0 20px 0;
    padding: 0 0 0;
    padding-inline-start: 20px;
    width: -webkit-calc(100% - 20px);
    width: calc(100% - 20px);
    border-radius: 0;
}
.tabs {
    width: 100%;
    margin: 10px 0 20px 0;
    list-style: none;
}
ul {
    margin-top: 0;
    margin-inline-end: 35px;
    margin-bottom: 10px;
    margin-inline-start: 35px;
}
ol, ul {
    list-style: none;
}
body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, form, fieldset, input, select, textarea, p, blockquote, th, td {
    margin: 0;
    padding: 0;
    font-size: inherit;
}
用户代理样式表
ul {
    display: block;
    list-style-type: disc;
    margin-block-start: 1em;
    margin-block-end: 1em;
    padding-inline-start: 40px;
    unicode-bidi: isolate;
}
body {
    font-family: Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5em;
    color: #444444;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    background-color: #FFF;
    background-image: -webkit-gradient(linear, left top, right top, color-stop(0, #F4F7FA), color-stop(200px, #F4F7FA), color-stop(201px, #CCCCCC), color-stop(202px, #FFFFFF));
    background-image: -o-linear-gradient(right, #F4F7FA 0, #F4F7FA 200px, #CCCCCC 201px, #FFFFFF 202px);
    background-image: -moz-linear-gradient(right, #F4F7FA 0, #F4F7FA 200px, #CCCCCC 201px, #FFFFFF 202px);
    background-image: -webkit-linear-gradient(right, #F4F7FA 0, #F4F7FA 200px, #CCCCCC 201px, #FFFFFF 202px);
    background-image: -ms-linear-gradient(right, #F4F7FA 0, #F4F7FA 200px, #CCCCCC 201px, #FFFFFF 202px);
    background-image: linear-gradient(to right, #F4F7FA 0, #F4F7FA 200px, #CCCCCC 201px, #FFFFFF 202px);
    background-repeat: repeat-y;
    background-size: 202px 10px;
    background-position: -20px top;
}