.flex {
    display: flex;
}
.flex.column {
    flex-direction: column;
}
.flex.aic {
    align-items: center;
}
.flex.jsc {
    justify-content: center;
}
.flex.jsa {
    justify-content: space-around;
}
.flex.jsb {
    justify-content: space-between;
}
.flex.wrap {
    flex-wrap: wrap;
}

header {
    width: 100%;
    height: 80px;
    background-color: #222;
    min-width: 1920px;
}

.header {
    width: 1200px;
    height: 100%;
    margin: 0 auto;
}

.header .logo {
    width: 158px;
    height: 36px;
    cursor: pointer;
}
.header .header-nav {
    color: #999;
}
.header .header-nav a {
    color: #999;
    outline: none;
    text-decoration: none!important;
}
.header .header-nav div {
    width: 120px;
    cursor: pointer;
    text-align: center;
}

.header .header-nav div:hover,
.header .header-nav div.active {
    color: #fff;
}

footer {
    width: 100%;
    height: 237px;
    background-color: #131313;
    box-sizing: border-box;
    padding-top: 27px!important;
}

footer .footer {
    width: 1200px;
    margin: 0 auto;
    color: #999;
    white-space: nowrap;
}
footer .footer .links {
    margin-bottom: 15px;
}
footer .footer .platforms {
    margin-bottom: 15px;
}
footer .footer .links span {
    margin-right: 20px;
    cursor: pointer;
}
footer .footer .links span:hover {
    text-decoration: underline;
}
footer .footer .platforms span {
    margin-right: 20px;
    cursor: pointer;
}
footer .footer .platforms span:hover {
    text-decoration: underline;
}
footer .footer .footer-desc {
    font-size: 12px;
    color: #6d6d6d;
    text-align: center;
    line-height: 18px;
    margin-top: 20px;
}
footer .footer .footer-desc2 {
    margin-top: 15px;
}