body, h1, p {
    margin: 0;
    padding: 0;
}

span, p {
    text-align: left;
}

header {
    height: 65px;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0px;
    width: 100%;
    background: rgb(255, 255, 255);
    box-shadow: rgba(0, 0, 0, 0.2) 0px 0px 5px;
}

header .tas-logo {
    margin-left: 32px;
    display: flex;
    align-items: center;
    height: 100%;
}

header .tas-logo .logo-box{
    height: 100%;
    border-bottom: 4px solid #1880ff;
    display: flex;
    align-items: center;
}
header .tas-logo img {
    width: 189px;
}
header .tas-logo a{
    margin-left: 20px;
    display: inline-block;
}
header .tas-logo a>img {
    height: 37px;
    width: auto;
}
header .tas-logo a.cocall{
    margin-left: 28px;
}
header .tas-logo a.cocall>img{
    margin-top: 2px;
}
header .tas-logo a.wangxiang>img{
    height: 40px;
    width: auto;
}

header .contact-hotline {
    margin-right: 40px;
    color: #000000;
    text-align: right;
    margin-top: 6px;
    display: flex;
    font-weight: bold;
}

header .contact-hotline .tas-tel-img{
    height: 20px;
    margin: 5px
}
header .contact-hotline .tas-tel-text.value{
    text-align: left;
}

header .contact-hotline .tas-tel-text{
    
    display: inline-block;
    vertical-align: top;
    color: #496CF2;
}

main {
    text-align: center;
    padding-top: 65px;
}
.tas-banner {
    height: 452px;
    background-image: url('../image/banner.png');
    background-size: cover;
    background-position: bottom;
    display: flex;
    align-items: center;
}

.tas-banner2 {
    height: 452px;
    background-image: url('../image/banner2.png');
    background-size: 100% 100%;
    background-position: bottom;
    display: none;
    align-items: center;
}

.tas-banner .banner-content {
    margin-left: 20%;
    width: 500px;
}

.tas-banner .trial-button{
    height: 50px;
    width: 200px;
    font-size: 20px;
    line-height: 50px;
    display: inline-block;
    margin-top: 30px;
    background-color: #6964e7;
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
}

.tas-banner .trial-button:hover {
    background-color: #8f87fe;
}

.tas-banner p {
    font-size: 28px;
    line-height: 44px;
    font-weight: 400;
}

.tas-banner p.product-name{
    font-size: 40px;
    line-height: 73px;
}

.tas-banner p.banner-title {
    font-size: 52px;
    line-height: 58px;
    font-weight: 700;
    margin-bottom: 25px;
}

.product-info {
    text-align: center;
    padding: 0 18%;
    margin-top: 65px;
}

.title {
    font-size: 40px;
    color: #4671FE;
    line-height: 52px;
    font-weight: 700;
}

.title .title-begin {
    color: #000;
}

.product-description {
    font-size: 16px;
    line-height: 32px;
    font-weight: 400;
}

.feature-container {
    display: flex;
    justify-content: center;
}

.feature {
    height: 468px;
    width: 278px;
    padding: 60px 45px;
    text-align: center;
    background: #F2F6FF;
    border-radius: 20px;
    margin: 0 auto;
    margin-top: 49px;

}

.feature:not(:first-child) {
    margin-left: 48px;
}

.feature h3 {
    font-size: 24px;
    font-weight: 700;
}

.feature p {
    font-size: 16px;
    color: rgba(0,0,0,0.63);
    line-height: 26px;
    font-weight: 400;
}

.certifications {
    text-align: center;
    background-image: url('../image/certification-background.png');
    background-size: cover;
    padding: 30px 20px 70px 20px;
    margin-top: 70px;
}

.certification-row {
    display: flex;
    justify-content: center;
    margin-top: 20px;
    flex-wrap: wrap;
    padding-left: calc(50% - 625px);
    padding-right: calc(50% - 625px);
}

.certification {
    text-align: center;
    margin: 10px;
}

.certification img{
    height: 196px;
    max-width: 100%;
}

.certification h3 {
    font-size: 24px;
    font-weight: 400;
}

.architecture {
    text-align: center;
    margin-top: 50px;
}

.architecture-div {
    display: flex;
    align-items: center;
    justify-content: center;
}

.architecture-div .architecture-desc {
    width: 410px;
    padding: 50px;
    background-color: #F2F6FF;
    border-radius: 20px;
    display: flex;
    justify-content: center;
    flex-direction: column;
    max-height: 400px;
    overflow: hidden;
}

.architecture-div .architecture-desc p{
    font-size: 16px;
    line-height: 32px;
}

.architecture img {
    height: 500px;
    margin-left: 50px;
}

.recommends {
    text-align: center;
    margin-top: 70px;
    padding: 30px 0 80px 0;
    background-color: #F4F8FD;
}

.recommend-row {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    padding-left: calc(50% - 625px);
    padding-right: calc(50% - 625px);
}

.recommend-text {
    position: absolute;
    width: 312px;
    height: 100px;
    transform: translate(15%, -120%);
}
.recommend{
}
.recommend:hover {
    cursor: pointer;
}

.recommend p {
    font-size: 12px;
    color: #1B2633;
    line-height: 18px;
    font-weight: 400;
}

.recommend p.youtu-text {
    color: #175EFF;
    margin-top: 5px;
}

.recommend p.cocall-text {
    color: #fff;
}

.footer {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #333940;
    color: #fff;
    padding: 20px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 50px 0;
}

.contact-item {
    text-align: left;
}

.contact-item h4 {
    margin: 0;
    font-size: 18px;
    color: #E2E5E8;
    line-height: 32px;
    font-weight: 400;
}

.contact-item p, .contact-item a {
    min-width: 204px;
    font-size: 15px;
    color: #858B92;
    line-height: 32px;
    font-weight: 400;
    text-decoration: unset;
}

.qrcodes {
    display: flex;
    flex-wrap: wrap;
    margin-top: 50px;
    justify-content: center;
    margin-left: 5%;
}

.qrcode {
    padding-left: 8px;
    text-align: center;
    margin-bottom: 25px;
    min-width: 160px;
}

.qrcode img{
    width: 100px;
    height: 100px;
    border-radius: 5px
}

.qrcode p {
    font-size: 14px;
    text-align: center;
}

.copyright {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #292D35;
    text-align: center;
    font-size: 15px;
    color: #787C84;
    line-height: 32px;
    font-weight: 400;
}

.copyright span{
    margin-right: 20px;
}

.copyright img{
    margin-top: 2px;
    margin-right: 5px;
}