.fixBtn {
    all: unset;
    width: 55px;
    height: 55px;
    position: fixed;
    bottom: 80px;
    right: 100px;
    background-image: url(./img/upBtn.png);
    background-repeat: no-repeat;
    background-size: cover;
    z-index: 20;
}

.fixBtn:hover {
    filter: drop-shadow(0px 4px 4px rgba(0, 0, 0, 0.45));
}

.topBar {
    padding-top: 40px;
    padding-left: 50px;
    padding-right: 50px;
    margin-bottom: 45px;
}

.logo {
    width: 106px;
    height: 55px;
    display: inline-block;
    font-size: 30px;
    margin: 0 auto;
    color: rgba(248, 250, 249, 0.7);
    font-weight: bold;
    text-decoration: none;
}

.AboutUs {
    background-color: #13322C;
    color: white;
    width: 139px;
    height: 55px;
    line-height: 55px;
    border-radius: 30px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    float: right;
    font-size: 20px;
}

a:hover {
    filter: drop-shadow(0px 4px 4px rgba(255, 255, 255, 0.25));
}

.ABlab_bgimg {
    background-image: url(./img/ABlab_bgimg.png);
    background-repeat: no-repeat;
    background-size: contain;

    margin: 0 auto;
}

.main {
    padding-top: 5px;
    padding-left: 50px;
}

.main_h {
    display: inline-block;
    font-size: 50px;
    width: 600px;
    line-height: 83px;
    margin-top: 55px;
}

.main_p {
    padding-top: 20px;
    padding-bottom: 400px;
    margin: 0 auto;

    font-size: 20px;
    line-height: 38px;
}

.ABlab_ex {
    width: 300px;
}

.news {
    height: 800px;
    background-image: url(./img/news.png);
    background-repeat: no-repeat;
    background-size: cover;
    text-align: center;
    color: #13322C;
    margin: 0 auto;
    position: relative;
}

.bg {
    background-image: url(./img/bg.png);
    background-repeat: no-repeat;
    background-size: contain;
    height: 1080px;
    text-align: center;
    margin: 0 auto;
}

.app_bg {
    display: inline-block;
    background: #2D4538;
    border-radius: 70%;
    width: 550px;
    height: 550px;
}

.app {
    height: 450px;
}

.app_p {
    display: inline-block;
    position: relative;
    left: 30px;
    font-size: 20px;
    line-height: 50px;
}

.recommend {
    width: 50px;
    margin-bottom: 10px;
}

.underscore {
    background: rgba(45, 132, 115, 0.2);
    height: 15px;
    margin: 0 auto;
    position: relative;
    top: -8px;
}

.review_bg {
    display: inline-block;
    width: 170px;
    background-color: #F8F8F8;
    border-radius: 10px;
    padding: 20px;
}

.comment {
    width: 750px;
    padding: 20px;
    display: block;

    background: #F6F6F6;
    border: 1px solid #B3B3B3;
    color: #A7A7A7;
}

.comment_bg {
    line-height: 30px;
    padding-bottom: 200px;
}

.comment_li {
    margin-top: 30px;
    margin-bottom: 30px;
}

.btn {
    width: 150px;
    height: 220px;
    background: #13322C;
    border: none;
    border-radius: 15px;
    color: white;
    text-align: center;
    font-size: 20px;
    vertical-align: bottom;
}

.btn :hover {
    cursor: pointer;
    box-shadow: 0px 4px 4px rgba(0, 0, 0, 0.2);
}

li {
    list-style-type: none;
}

#slideShow {
    width: 960px;
    height: 495px;
    position: relative;
    margin: 0 auto;
    overflow: hidden;
}

.func {
    position: absolute;
    left: 0;
    top: 0;
    transition: left 0.5s ease-out;
    padding-left: 0;
}
  
.func li{
    float: left;
    margin-right: 305px;
    margin-left: 305px;
}

.slideController span{
    position: absolute;
    background-color: #13322C;
    color: white;
    font-size: 25px;
    text-align: center;
    width: 30px;
    height: 30px;
    border-radius: 70%;
    padding: 10px;
    cursor: pointer;
}

.slideController span:hover{
    background-color: rgba(128, 128, 128, 0.11);
}

.prev{
    left: 10px;
    top: 300px;
}

.prev:hover{
    transform: translateX(-5px);
}

.next{
    right: 10px;
    top: 300px;
}

.next:hover{
    transform: translateX(5px);
}