style.css

@charset "utf-8";

/*================================================= Reset ============================================================*/
html {
    color: #777;
    background-color: #f1f1f1;
}
body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, p, form, input, textarea, th, td {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
ol, ul {
    list-style: none;
}
a {
    text-decoration: none;
    outline: none;
}
button, a:active, a:hover, a:focus, input {
    outline: none;
}
input:required:invalid, input:focus:invalid {
    box-shadow: none;
}
.clear {
    clear: both;
}
/* HTML5 标签支持 */
header, section, footer, aside, nav, article, figure {
    display: block;
}
/* 依次为 macOS Windows Linux 字体回退 */
h1, h2, a, p, span, div {
    font-weight: normal;
    font-family: "Helvetica Neue", "Hiragino Sans GB", "微软雅黑", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
}
/*=============================================== END Reset ==========================================================*/


/*=================================================== 导航 ============================================================*/
.u_nav-wrapper {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: white;
    border-bottom: 1px #ccc solid;
    z-index: 10;
}
.u_nav {
    max-width: 1400px;
    margin: auto;
}
.u_nav-left {
    margin: 18px;
    font-size: 16px;
}
.u_nav-right {
    margin: 18px;
    font-size: 14px;
}
.u_nav-left, .u_nav-input {
    float: left;
}
.u_nav-right {
    position: relative;
    top: 3px;
    float: right;
}
.u_nav-right > a {
    margin-right: 20px;
}
.u_nav-link {
    color: #777;
}
.u_nav-input, .u_nav-btn {
    float: left;
    position: relative;
    height: 38px;
    top: 10px;
    padding: 5px;
    font-size: 16px;
    color: #777;
    border: 1px lightgray solid;
}
.u_nav-input {
    display: block;
    width: 200px;
    border-right: 0;
    border-radius: 3px 0 0 3px;
}
/* PC 端搜索框组 */
.u_nav-btn {
    font-size: 14px;
    display: block;
    width: 80px;
    text-align: center;
    cursor: pointer;
    line-height: 24px;
    vertical-align: middle;
    border-radius: 0 3px 3px 0;
}
.u_nav-ul {
    position: relative;
    top: 7px;
    left: -6px;
    width: 80px;
    display: block;
    background-color: white;
    z-index: 5;
}
.u_nav-li {
    font-size: 14px;
    display: block;
    height: 35px;
    line-height: 30px;
    vertical-align: middle;
}
.u_nav-btn > ul {
    border: 0;
}
.u_nav-btn > ul > li {
    display: none;
}
.u_nav-btn:hover {
    border-bottom: 0;
}
.u_nav-btn:hover > ul {
    border: 1px lightgray solid;
    border-top: 0;
    border-radius: 0 0 3px 3px;
}
.u_nav-btn:hover > ul > li {
    display: block;
}
/* 移动端搜索框组 */
.um_nav-input-group {
    display: none;
}
@media (max-width: 1000px) {
    .u_nav-right,.u_nav-input-group {
        display: none;
    }
    .um_nav-input-group {
        display: block;
    }
    .um_nav-input, .um_nav-btn {
        display: block;
        height: 30px;
        margin-bottom: 10px;
        float: left;
        color: #777;
        padding: 5px;
        border: 1px lightgray solid;
    }
    .um_nav-input {
        margin-left: 15px;
        width: 130px;
        font-size: 12px;
        border-radius: 3px 0 0 3px;
    }
    .um_nav-btn {
        font-size: 12px;
        width: 50px;
        text-align: center;
        cursor: pointer;
        line-height: 20px;
        vertical-align: middle;
        border-left: 0;
        border-radius: 0;
    }
    .um_nav-btn:last-child {
        border-radius: 0 3px 3px 0;
    }
}
/*================================================= END 导航 ==========================================================*/


/*=================================================== main ===========================================================*/
.u_main-wrapper {
    max-width: 1200px;
    margin: 60px auto auto auto;
}
.main {
    margin: 10px;
}
.main-col {
    float: left;
    width: 33%;
}
.main-block {
    margin: 10px 5px 5px 5px;
    padding: 10px;
    background-color: white;
}
.block-title {
    display: block;
    margin: 5px auto 10px 15px;
    font-size: 18px;
    color: #337ab7;
}
.block-grid {
    position: relative;
    float: left;
    width: 33%;
    text-align: center;
    height: 120px;
}
.block-grid > a {
    display: block;
    color: #666;
}
.grid-title {
    display: block;
}
.grid-icon {
    display: block;
    font-size: 3.33em;
}
.block-grid.new::before {
    content: "new";
    position: absolute;
    top: -1em;
    right: 0;
    font-size: 0.75em;
    padding: 0 0.5em;
    border-radius: 1000px;
    background-color: #777;
    color: #fff;
}
/* 矢量图标 */
.icon {
    position: relative;
    top: 10px;
    display: inline-block;
    width: 50px;
    height: 50px;
    stroke-width: 0;
    stroke: currentColor;
    fill: currentColor;
}
.footer {
    margin: 20px;
    font-size: 14px;
    color: #777;
}
.footer > a {
    color: #337ab7;
}
@media (max-width: 1000px) {
    .u_main-wrapper {
        margin: 100px auto auto auto;
    }
    .main-col {
        width: 100%;
    }
}
/*================================================= END main =========================================================*/