.about-main {
    width: 1000px;
    margin: 60px auto 0;
}
.about-nav {
    width: 100%;
    overflow: hidden;
    background-color: #fafafa;
    font-size: 28px;
    font-weight: 600;
    color: #666;
    border-bottom: 2px solid #ebebeb;
}
.about-nav ul {
    width: 1000px;
    margin: 0 auto;
}
.about-nav ul li {
    display: block;
    width: 248px;
    height: 110px;
    line-height: 110px;
    text-align: center;
    letter-spacing: 2px;
    cursor: pointer;
    float: left;
}
.nav-active {
    background: #eee;
    color: #3d4b8c;
    border-bottom: 5px solid #3d4b8c;
}
.about-desc {
    display: block;
    margin-bottom: 200px;
}
.about-apti, .about-deve, .about-cont {
    display: none;
}
.about-desc video {
    width: 1000px;
    height: 564px;
    background-color: #ebebeb;
}
.about-title {
    font-size: 32px;
    color: #323232;
    text-align: center;
    margin-bottom: 60px;
}
.about-desc p:first-of-type {
    font-size: 14px;
    color: #333;
    margin-top: 60px;
    line-height: 28px;
}
.about-apti-item {
    width: 300px;
    margin-right: 50px;
    margin-bottom: 50px;
}
.about-apti-item p {
    font-size: 18px;
    color: #323232;
    line-height: 30px;
    padding-top: 15px;
}
.about-apti {
    padding-bottom: 200px;
}
.about-deve-item {
    width: 300px;
    height: 355px;
    margin-right: 50px;
    margin-bottom: 200px;
    padding: 65px 34px 60px;
    box-shadow: 0px 3px 9px 0px #ebebeb;
    text-align: center;
}
.about-deve-item p {
    font-size: 24px;
    text-align: center;
    line-height: 36px;
    margin-top: 24px;
}
.about-cont {
    width: 540px;
    margin: 0 auto 200px;
}
.about-cont-item {
    /* display: flex;
    align-items: center; */
    font-size: 20px;
    color: #323232;
    line-height: 40px;
}
.about-cont-item img {
    margin-right: 20px;
    margin-bottom: 6px;
    display: inline-block;
}
.about-cont-item p {
    margin: 0;
    display: inline-block;
}
.about-cont-qrcode {
    margin-top: 80px;
    /* display: flex;
    align-items: center;
    justify-content: space-around; */
    text-align: center;
    font-size: 16px;
    color: #666;
    line-height: 56px;
}
.about-cont-qrcode div {
    display: inline-block;
    margin-right: 80px;
}