.c {
    position: relative;
    color: #333;
    font-family: Oxygen, Helvetica Neue, Arial, sans-serif;
}

body {
    background: #fff;
}

.pm_header {
    color: #fff;
    position: absolute;
    left: 50px;
    top: -242px;
}

.pm_header .title {
    font-size: 50px;
    line-height: 56px;
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
    max-height: 56px;
    word-wrap: break-word;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
}

.pm_header p {
    font-size: 16px;
}

.downlaod_btn {
    margin-top: 40px;
    padding-left: 50px;
    padding-right: 50px;
    border-radius: 2px;
    height: 46px;
    line-height: 45px;
    background: 0 0;
    color: #fff;
    text-align: center;
    display: inline-block;
    cursor: pointer;
    outline: 0;
    box-sizing: border-box;
    text-decoration: none;
    font-size: 15px;
    border: 1px solid rgba(255, 255, 255, .6);
}

.downlaod_btn:hover {
    transition: all .2s linear;
    background-color: #fff;
    color: #000;
}

._title {
    overflow: hidden;
    color: #333;
    margin-top: 100px;
    padding: 30px;
}

._title .small_p {
    color: #666;
    margin-top: 15px;
    font-size: 17px;
    margin-left: 6px;
    line-height: 36px;
}

._title .middle_p {
    color: #333;
    margin-top: 15px;
    font-size: 22px;
    margin-left: 6px;
    line-height: 36px;
    margin-top: 36px;
}

._title h2 {
    line-height: 50px;
    font-size: 38px;
}

._title h1 {
    color: #4fd1ef;
    line-height: 50px;
    font-size: 34px;
}

._title h1 .small_title {
    color: #333;
    margin-left: 20px;
}

#bottom_download {
    width: 100%;
    height: 200px;
    text-align: center;
    background: #292929;
    border-bottom: 4px solid #51505a;
}

.footer {
    margin-top: 0;
}

.introNum {
    margin-right: 10px;
    color: #4fd1ef;
    font-size: 50px;
}

.feature {
    position: relative;
    height: 70px;
    background-color: #fff;
}

.navBox {
    position: absolute;
    top: 0;
    left: 0;
    background-color: #f9f9f9;
    width: 100%;
    color: #adadad;
    border-top: 1px solid #eaeaea;
    border-bottom: 1px solid #eeefee;
    font-size: 0;
    z-index: 2;
}

.navBox .liBtn a {
    color: #adadad;
}

.navBox .liBtn {
    display: inline-block;
    box-sizing: border-box;
    margin: 20px 0;
    min-width: 100px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    font-size: 14px;
    border-left: 2px solid #eee;
    cursor: pointer;
}

[data-animation] {
    opacity: 0;
}

[data-animation].animated {
    opacity: 1;
}

.banner_float {
    width: 383px;
    position: absolute;
    top: 62px;
    right: 128px;
}

.video_box {
    padding: 10px;
}

.h_title h1 {
    font-size: 36px;
    box-sizing: border-box;
    font-weight: normal;
    margin: 40px;
}

.h_title {
    padding: 60px 0;
    padding-top: 40px;
}

.h_title h3 {
    font-size: 24px;
    box-sizing: border-box;
}


.h_title p {
    font-size: 17px;
    margin: 20px;
    margin-bottom: 60px;
    padding: 0 40px;
    color: #666;
}

.bg_black {
    background: #444;
    color: #fff
}

.bg_black p {
    color: #aaa;
}

.banner_business {
    background-image: url(https://cache.zhidayun.net/wp-media/2020/04/banner-pc_d126ac0037939bbc71c0937b71055c01.png) !important;
    background-position: center;
    background-size: cover;
}

.pm_bus_header {
    color: #fff;
    padding-top: 100px;
}

.pm_bus_header .title {
    font-size: 50px;
    line-height: 56px;
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
    max-height: 56px;
    word-wrap: break-word;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
}

.pm_bus_header p {
    font-size: 16px;
}