.apilogo {
    top: 54px;
}
.api_mainimg .main_text {
    display: flex;
}
.api_mainimg .main_text > div {
     display: block;
}
.what-is-sms-api .api_title {
    margin-top: 100px;
}
.what-is-sms-api .desc {
    max-width: 1120px;
    text-align: center;
    margin: 30px auto 0 auto !important;
}
.linked {
    text-decoration: underline;
}
.toll-free-api li {
    font-size: 16px !important;
    color: #536170 !important;
    line-height: 24px !important;
}
.toll-free-api li:first-child {
    margin-bottom: 28px !important;
}
.youtube_web {
    display: block;
}
.youtube_mobile {
    display: none;
}
.pageapi_dec {
    max-width: 1140px;
    margin: 80px auto 0 auto;
}
.main_con .advantage {
    padding-top: 100px;
}
.case_list li {
    padding: 40px 30px 22px;
}
.case_list li .tit {
    width: 320px;
}
.api_mainimg .btn_center .btn_sign:hover, .main_con .btn_center .btn_sign:hover {
    border: 0;
    color: #fff;
    background-color: #3eb6ec;
}
.api_mainimg .btn_center .btn_sign, .main_con .btn_center .btn_sign {
    line-height: 45px;
}
@media screen and (max-width: 1280px) {
    .youtube_web {
        display: none;
    }
    .youtube_mobile {
        display: block;
        width: 100%;
    }
    .youtube_mobile img {
        max-width: 100% !important;
        margin-top: 50px;
    }
}
@media screen and (max-width: 1200px) {
    .apilogo {
        top: 15px;
    }
    .what-is-sms-api .api_title {
        margin-top: 70px;
    }
}
@media screen and (max-width: 900px) {
    .apilogo img {
         width: auto;
    }
}
@media screen and (max-width: 768px) {
    .pageapi_dec {
        margin-top: 50px !important;
    }
    .main_con .advantage {
        padding-top: 50px;
    }
}
@media screen and (max-width: 500px) {
    .case_list li .tit {
        width: 100%;
    }
}