*{
    margin: 0;
    padding: 0;
    font-family: 'Noto Sans TC', sans-serif;
    letter-spacing: 1px;
}
.wrapper{
    overflow: hidden;
}
.container .row{
    max-width: 1200px;
    margin: auto;
}
i{
    margin: 10px;
}
/*固定大標*/
.title{
    width: 70%;
    margin: 50px auto;
    text-align: center;
}
.title h2{
    display: inline-block;
    color:#076991;
    font-size: 38px;
    font-weight: 700;
    margin: 0 auto 30px;
    letter-spacing: 2px;
    border-bottom: 2px solid #076991;
    padding: 0 40px 5px;
}
.title h2 br{
    display: none;
}
.title h3{
    display: inline-block;
    color: #006EFF; 
    font-size: 26px; 
    font-weight: bold; 
    margin: auto; 
    border: 2px solid #006EFF; 
    padding: 10px 35px; 
}
.title h3 br{
    display: none;
}

@media screen and (max-width: 860px){
    .title{
        width: 95%;
        margin: auto;
    }
    .title h2{
        box-shadow: 0 0;
        font-size: 36px;
        line-height: 46px;
    }
    .title h2 span{
        border: 0;
        padding: 10px 5px;
    }
    .title h2 br{
        display: initial;
    }
    .title h3{
        margin: 50px auto 0;
        font-size: 28px;
        line-height: 38px;
    }
    .title h3 br{
        display: initial;
    }
    .title h3 span{
        border: 0;
    }
}

@media screen and (max-width: 450px){
    .title h2{
        font-size: 30px;
        line-height: 40px;
    }
    .title h3{
        width: 80%;
        margin: 30px auto 0;
        font-size: 24px;
        line-height: 34px;
        padding: 10px 20px;
    }
}

/*上方導覽(電腦)*/
.header-com{
    position: fixed;
    top: 0px;
    height: 100px;
    width: 100%;
    z-index: 20;
    transition: 0.7s;
}
.header-com.sticky{
    background: #076991;
    transition: 0.7s;
}
.nav-com{
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 90%;
    margin: auto;
}
.logo-com img{
    width: 500px;
    margin-top: 5px;   
}
.menu-com{
    display: flex;
    justify-content: end;
    align-items: center;
}
.menu-com a{
    color: #fff;
    font-weight: 500;
    letter-spacing: 2px;
    text-decoration: none;
    margin:  0 10px;
    font-size: 20px;
    transition: 0.5s;
}
.menu-com p{
    color: #fff;
    font-size: 20px;
    margin: 0 5px;
}
.menu-com a:hover{
    color: 	#02F78E;
    transition: 0.5s;
}

@media screen and (max-width:1450px){
    .header-com{
        height: 85px;
    }
    .logo-com img{
        width: 400px;
        margin-top: 10px;   
    }
}

@media screen and (max-width:860px){
    .header-com{
        display: none;
    }
}

/*上方導覽(平板/手機)*/
.header-phone{
    position: fixed;
    top: 0px;
    height: 80px;
    width: 100%;
    z-index: 100;
    transition: 0.7s;
}
.header-phone.sticky{
    background: #076991;
    transition: 0.7s;
}
.nav-phone{
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 90%;
    margin: 5px auto;
}
.logo-phone img{
    width: 400px;    
}
.menu-open i{
    font-size: 30px;
    color: #fff;
}
.menu-phone{
    display: block;
    background: #fff;
    height: 100%;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    display: none;
}
.menu-block{
    position: relative;
    width: 100%;
    margin: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.menu-close i{
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 30px;
    color: #003060;
}
.menu-block a{
    max-width: 250px;
    width: 70%;
    color: #003060;
    font-weight: 600;
    letter-spacing: 2px;
    text-decoration: none;
    text-align: center;
    margin: 40px auto;
    font-size: 20px;
    border-bottom: 1px solid #003060;
    padding: 0 20px;
}

@media screen and (min-width:860px){
    .header-phone{
        display: none;
    }
    .menu-phone{
        display: none;
    }
}
@media(max-width: 450px){
    .logo-phone img{
        width: 250px;    
    }
    .header-phone{
        height: 60px;
    }
}
/*bn*/
.banner{
    width: 100%;
    background-image: url(../images/banner-bg-desktop.png);
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    height: 1000px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}
.banner .tool{
    position: absolute;
    bottom: 20px;
    left: 20px;
    z-index: 10;
}
.banner .content{
    max-width: 800px;
    width: 90%;
    margin: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}
.banner .content .bn_title{
    display: flex;
    flex-direction: column;
    justify-items: center;
    align-items: center;
}
.banner .content .bn_title h2{
    font-size: 22px;
    font-weight: 600;
    color: #000f40;
    background: #00FFFF;
    padding: 15px 25px;
}
.banner .content .bn_title picture{
    padding: 20px 0;
}
.banner .content .bn_title picture img{
    width: 100%;
}
.banner .content .bn_title p{
    letter-spacing: 2px;
    text-align: center;
    font-size: 28px;
    font-weight: 500;
    line-height: 40px;
    color: #fff;
    font-style: italic;
}
.banner .content .bn_title p span{
    color: #00FFFF;
    font-size: 1.8em;
    font-weight: 700;
    font-family: Arial, sans-serif;
    padding: 0 5px;
}
.banner .content .bn_title p span.slogan{
    color: #fff;
    font-size: 0.7em;
    font-weight: 400;
}

@media screen and (max-width:1450px){
    .banner .content{
        max-width: 700px;
    }
}

@media screen and (max-width:860px){
    .banner{
        background-image: url(../images/banner-bg-pad.png);
        height: 1400px;
    }
}

@media screen and (max-width:450px){
    .banner{
        background-image: url(../images/banner-bg-phone.png);
        height: 900px;
    }
    .banner .content{
        margin-top: 180px;
    }
    .banner .content .bn_title h2{
        font-size: 18px;
        padding: 7px 15px;
    }
    .banner .content .bn_title p{
        font-size: 18px;
        line-height: 24px;
        margin: 15px auto 0;
    }
    .banner .tool img{
        width: 70%;
    }
    .banner .content .bn_title p span.slogan{
        font-size: 0.8em;
        margin: 15px auto 0;
    }
}

/*introduction*/
.introduction{
    width: 100%;
    padding: 100px 0;
}
.introduction .content{
    width: 100%;
    margin: auto;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    text-align: justify;
}
.introduction .content .imgbox{
    width: 50%;
    margin: auto 15px auto 0;
}
.introduction .content .imgbox img{
    width: 100%;
}
.introduction .content .textbox{
    width: 700px;
    margin: auto auto auto 15px;
}
.introduction .content .textbox h2{
    display: inline-block;
    color: #ef1d78;
    font-size: 32px;
    font-weight: 700;
    line-height: 52px;
    letter-spacing: 2px;
}
.introduction .content .textbox p{
    margin: 20px auto;
    color: #3c3c3c;
    padding-top: 10px;
    font-size: 18px;
    font-weight: 400;
    letter-spacing: 2px;
    line-height: 32px;
}
.introduction .content .textbox p span{
    color: #076991;
    font-size: 1.1em;
    font-weight: 600;
}

@media screen and (max-width:860px){
    .introduction .content{
        flex-direction: column;
    }
    .introduction .content .imgbox{
        width: 100%;
        margin: 0;
    }
    .introduction .content .textbox{
        margin: 20px auto;
        width: 90%;
    }
    .introduction .content .textbox p{
        font-size: 20px;
        line-height: 36px;
    }
}

@media screen and (max-width:450px){
    .introduction{
        padding: 100px 0 20px;
    }
    .introduction .content .textbox h2{
        padding: 5px 15px;
        font-size: 26px;
        line-height: 36px;
    }
    .introduction .content .textbox p{
        font-size: 17px;
        line-height: 28px;
    }
}

.value{
    width: 100%;
    padding: 100px 0;
}
.value .content{
    max-width: 1100px;
    width: 90%;
    margin: auto;
    text-align: center;
}
.value .content p{
    margin: 20px auto;
    color: #3c3c3c;
    padding-top: 10px;
    font-size: 20px;
    font-weight: 400;
    letter-spacing: 2px;
    line-height: 40px;
}
.value .content p span{
    color: #ef1d78;
    font-size: 1.2em;
    font-weight: 600;
    line-height: 42px;
}

@media screen and (max-width:450px){
    .value{
        padding: 20px 0 50px;
    }
    .value .content h3{
        padding: 5px 15px;
        font-size: 26px;
        line-height: 36px;
    }
    .value .content p{
        font-size: 17px;
        line-height: 28px;
    }
}

/*為什麼要學AI*/
.why{
    width: 100%;
    margin: 50px auto;
}
.why .content{
    display: flex;
    justify-content: center;
    align-items: flex-start;
    max-width: 1200px;
    width: 90%;
    margin: auto;
}
.why .content .item{
    width: 300px;
    margin: 50px;
    text-align: center;
}
.why .content .item img{
    width: 100%;
}
.why .content .item p{
    font-size: 16px;
    font-weight: 400;
    line-height: 26px;
    color: #3c3c3c;
    margin: auto;
}
.why .content .item p span{
    font-size: 1.5em;
    font-weight: 500;
    line-height: 1.5em;
    color: #ef1d78;
    margin: auto;
}
.why .content.flag .item p{
    font-size: 16px;
    font-weight: 400;
    line-height: 28px;
    color: #3c3c3c;
    margin: 15px auto 0;
}
.why .content.flag .item p span{
    font-size: 0.8em;
    line-height: 0.8em;
    color: #8f8f8f;
}
.why .content.flag .item.taiwan{
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}
.why .content.flag .item.taiwan img{
    margin: auto 30px;
}
.why .content.flag .item.taiwan p{
    font-size: 18px;
    font-weight: 600;
    line-height: 30px;
    color: #3c3c3c;
    text-align: left;
}
@media(max-width: 860px){
    .why .content .item{
        margin: 50px 20px;
    }
}

/*手機*/
@media screen and (max-width:450px){
    .why .content{
        flex-direction: column;
    }
    .why .content .item{
        width: 280px;
        margin: 20px auto;
    }
    .why .content .item img{
        width: 85%;
    }
    .why .content .item p span{
        font-size: 1.3em;
        line-height: 1.3em;
    }
    .why .content.flag .item.taiwan{
        width: 90%;
        flex-direction: column;
    }
    .why .content.flag .item.taiwan p{
        text-align: center;
    }
}

/*課程特色*/
.feature{
    width: 100%;
    margin: 50px auto;
}
.feature .content{
    display: flex;
    justify-content: center;
    align-items: flex-start;
    max-width: 1800px;
    width: 90%;
    margin: auto;
}
.feature .content .item{
    width: 300px;
    margin: 20px 50px;
    text-align: center;
}
.feature .content .item img{
    width: 100%;
}
.feature .content .item h3{
    font-size: 22px;
    font-weight: 500;
    line-height: 32px;
    color: #ef1d78;
    margin: auto;
}
.feature .content .item p{
    font-size: 16px;
    font-weight: 400;
    line-height: 26px;
    color: #3c3c3c;
    margin: 10px auto;
}

@media(max-width: 860px){
    .feature .content{
        flex-wrap: wrap;
    }
    .feature .content .item{
        margin: 15px 30px;
    }
}

@media(max-width: 450px){
    .feature .content .item h3{
        font-size: 20px;
        line-height: 30px;
    }
}

/*適合對象*/
.student{
    width: 100%;
    margin: 50px auto 0;
    padding: 50px 0;
    background: #f1f1f1;
}
.student .content{
    display: flex;
    justify-content: center;
    align-items: flex-start;
    max-width: 1000px;
    width: 90%;
    margin: auto;
}
.student .content .item{
    width: 300px;
    margin: 0 50px;
    text-align: center;
}
.student .content .item img{
    width: 100%;
}
.student .content .item h3{
    font-size: 25px;
    font-weight: 700;
    line-height: 36px;
    color: #181818;
    margin: 20px auto;
}

@media(max-width: 860px){
    .student .content .item{
        margin: 0 30px;
    }
}

@media(max-width: 450px){
    .student .content{
        flex-direction: column;
    }
    .student .content .item{
        margin: 20px auto;
    }
}


/*課程目標*/
.target{
    padding: 50px 0;
    background: linear-gradient(180deg, #003060, #0066CC);
}
.target .title{
    padding: 0;
    margin: 0 auto;
}
.target .title h2{
    color: #00F2FF;
}
.target .content{
    max-width: 800px;
    width: 90%;
    text-align: center;
    margin: 20px auto;
}
.target .content h3{
    font-size: 26px;
    font-weight: 500;
    line-height: 38px;
    color: #fff;
}
.target .content p{
    margin: 30px auto 20px;
    font-size: 22px;
    font-weight: 400;
    line-height: 42px;
    font-style: italic;
    color: #b0eaee;
}

@media(max-width: 450px){
    .target .content h3{
        font-size: 20px;
        line-height: 32px;
    }
    .target .content p{
        font-size: 18px;
        line-height: 28px;
    }
}

/*課程資訊*/
.course{
    width: 100%;
    margin: 50px auto;
}
.course .content{
    max-width: 900px;
    width: 90%;
    border-radius: 10px;
    background-color: #f0f0f0;
    padding: 20px 0;
    margin: 15px auto;
}
.course .content .item{
    width: 90%;
    margin: auto;
    display: flex;
    justify-content: flex-start;
    flex-direction: column;
}
.course .content .item h3{
    font-size: 32px;
    font-weight: 700;
    line-height: 44px;
    letter-spacing: 1px;
    margin: 0 0 10px 0;
    color: #ef1d78;
}
.course .content .item h3 span{
    font-size: 20px;
    font-weight: 500;
    font-style: italic;
    line-height: 44px;
    letter-spacing: 1px;
    color: #636363;
}
.course .content .item .box{
    margin: 10px;
}
.course .content .item .box h4{
    font-size: 26px;
    font-weight: 600;
    line-height: 38px;
    letter-spacing: 1px;
    margin: 0 0 10px 0;
    color: #002547;
}
.course .content .item .box ul li{
    font-size: 20px;
    font-weight: 400;
    line-height: 34px;
    letter-spacing: 1px;
    margin: 5px 0;
    color: #002547;
}
@media(max-width: 450px){
    .course .content .item h2{
        font-size: 32px;
        line-height: 44px;
    }
    .course .content .item .box h4{
        font-size: 24px !important;
        line-height: 36px;
    }
    .course .content .item .box ul li{
        font-size: 18px;
        line-height: 30px;
    }
}

/*為什麼選擇艾鍗*/
.photo{
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.photo .content{
    max-width: 1200px;
    margin: auto;
    text-align: center;
}
.photo .content h4{
    color: #3c3c3c;
    font-size: 40px;
    letter-spacing: 2px;
    font-weight: bold;
    line-height: 60px;
    -webkit-box-reflect: below 0px -webkit-gradient(linear, left top, left bottom, from(transparent), color-stop(60%, transparent) , to(rgba(250, 250, 250, 0.2)));
    -moz-box-reflect: below 0px -moz-gradient(linear, left top, left bottom, from(transparent), color-stop(70%, transparent) , to(rgba(250, 250, 250, 0.3)));
}
.photo .content h4 span{
    color: #ef1d78;
    font-size: 1.4em;
}
.photo .content h4 br.second{
    display: none;
}

@media(max-width: 860px){
    /*photowall*/
    .photo{
        width: 90%;
        margin: auto;
    }
    .photo .content h4{
        font-size: 30px;
        line-height: 42px;
    }
    .photo .content h4 br.second{
        display: initial;
    }
}

@media(max-width: 450px){
    /*photowall*/
    .photo{
        width: 90%;
        margin: auto;
    }
    .photo .content h4{
        font-size: 22px;
        line-height: 34px;
    }
}

/*感謝狀*/
.thanks{
    max-width: 1000px;
    width: 90%;
    margin: 100px auto 20px;
}
.thanks h2{
    font-size: 26px;
    font-weight: 600;
    font-style: italic;
    line-height: 44px;
    color: #076991;
    margin: 30px auto 20px;
    text-align: center;
}

@media(max-width: 450px){
    .thanks h2{
        font-size: 22px;
        line-height: 36px;
        margin: 20px auto 10px;
    }
}

/*師資*/
.teacher{
    width: 100%;
    margin: 50px auto 0;
    padding: 50px 0;
}
.teacher .content{
    display: flex;
    justify-content: center;
    align-items: flex-start;
    max-width: 1200px;
    width: 90%;
    margin: auto;
}
.teacher .content .item{
    width: 280px;
    margin: 0 30px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    flex-direction: column;
}
.teacher .content .item img{
    width: 100%;
}
.teacher .content .item .textbox{
    background: #076991;
    padding: 10px 30px;
    height: 400px;
    border-radius: 10px;
    text-align: left;
}
.teacher .content .item .textbox h3{
    font-size: 26px;
    font-weight: 700;
    font-style: italic;
    line-height: 36px;
    color: #00FFFF;
    margin: 20px auto;
}
.teacher .content .item .textbox p{
    font-size: 16px;
    font-weight: 300;
    line-height: 26px;
    color: #fff;
    margin: 20px auto;
}

@media(max-width: 860px){
    .teacher .content{
        flex-wrap: wrap;
    }
}

@media(max-width: 450px){
    .teacher .content .item img{
        width: 80%;
        margin: auto;
    }
    .teacher .content{
        flex-direction: column;
    }
    .teacher .content .item{
        margin: 20px auto;
    }
    .teacher .content .item .textbox{
        background: #076991;
        padding: 10px 20px;
        height: auto;
    }
}

/*組合優惠*/
.sales{
    background-image: url(../images/sales-bg.png), linear-gradient(180deg, #31f4a1, #003b81);
    background-size: cover;
    text-align: center;
    padding-top: 50px;
}
.sales .col-12{
    padding: 50px 0 ;
}
.sales h2{
    color: #fff;
    font-size: 38px;
    font-weight: 700;
    margin: auto;
}
.sales h2 span{
    border-top: 2px solid #fff;
    border-bottom: 2px solid #fff;
    padding: 5px 70px;
}
.sales p{
    color: #fff;
    font-size: 20px;
    font-weight: 400;
    line-height: 60px;
    padding-top: 30px;
}
.sales p .money{
    font-family: Arial, sans-serif;
    color: #ffff00;
    font-size: 32px;
    font-weight: 700; 
    letter-spacing: 2px;
}
.sales p .small{
    font-size: 16px;
    text-decoration: line-through;
    opacity: 0.7;
}
/*手機*/
@media screen and (max-width: 450px){
    .sales{
        background: linear-gradient(180deg, #31f4a1, #003b81);
    }
    .sales .col-12{
        width: 90%;
        margin: auto;
    }
    .sales h2{
        font-size: 32px;
    }
    .sales h2 span{
        padding: 5px 30px;
    }
    .sales p{
        color: #fff;
        font-size: 18px;
        line-height: 50px;
    }
    .sales p .money{
        font-size: 28px; 
        letter-spacing: 2px;
    }
    .sales p .small{
        font-size: 14px;
        text-decoration: line-through;
    }
}

/*課程諮詢*/
.question{
    width: 100%;
    text-align: center;
    background-image: url(../images/form-bg.png);
    background-size: cover;
    padding: 60px 0;
}
form{
    max-width: 700px;
    width: 100%;
    margin: auto;
}
form h2{
    color:#004B97;
    text-shadow: 0 0 10px #00FFFF, 0 0 20px #00FFFF, 0 0 30px #00FFFF;
    font-weight: 700;
    letter-spacing: 2px;
    font-size: 50px;
    line-height: 100px;
}
form h4{
    color: #fff;
    font-weight: 400;
    line-height: 34px;
    font-size: 18px;
    padding-bottom: 30px;
}
form p{
    color: #ffff00;
    font-size: 18px;
    font-weight: 700;
    margin-top: -25px;
    padding: 0 0 30px;
}
form label{
    width: 100%;
    margin: 10px auto 0;
    font-size: 26px;
    font-size: 20px;
    font-weight: 400;
    color: #fff;
    text-shadow: 2px 2px 5px #003060;
}
form input{
    border-radius: 7px;
    margin: 10px auto;
    width: 100%;
    border: 0;
    padding: 5px 0;
}
form select{
    border: 0;
    text-align: center;
    width: 100%;
    border-radius: 7px;
    padding: 5px 0;
    margin: 10px auto;
}
form option{
    border: 0;
    width: 100%;
    border-radius: 7px;
}
form .button{
    text-align: center;
    max-width: 200px;
    width: 70%;
    margin: 30px 0;
    font-size: 20px;
    font-weight: 500;
    background-color: #076991;
    box-shadow: 0 5px 10px #00364b;
    border-radius: 50px;
    padding: 5px 30px;
    color: #fff;
    text-decoration: none;
    letter-spacing: 2px;
    border: 0;
    margin: 50px auto;
    transition: 0.5s;
}
form .button:hover{
    background-color: #00FFFF;
    box-shadow: unset;
    transform: translateY(5px);
    transition: 0.5s;
    color: #00364b;
}
@media screen and (max-width:860px){
    .question{
        background-image: url(../images/form-bg-pad.png);
        height: 900px;
    }
    .question .col-12{
        width: 100%;
        margin: auto;
    }
    .question label{
        width: 100%;
    }
    .question input{
        width: 100%;
    }
}
@media screen and (max-width:450px){
    .question{
        height: 1000px;
    }
    .question .button{
        font-size: 18px;
    }
}

/*Q&A*/
.answer{
    width: 100%;
    padding: 50px 0;
    background:linear-gradient(180deg,#003060,#0066CC);
}
.answer .row{
    width: 70%;
    margin: auto;
}
.answer .title h2{
    color: #00FFFF;
}
.answer img{
    width: 100%;
}
.space{
    padding-bottom: 60px;
}
.answer h4{
    font-size: 16px;
    color: #003060;
    background: #ACD6FF;
    border-radius: 5px;
    font-weight: 500;
    padding: 10px 40px;
    cursor: pointer;
    transition: 0.5s;
}
.answer p{
    margin-top: -10px;
    background: #fff;
    border: 2px solid #ACD6FF;
    border-bottom-left-radius: 5px;
    border-bottom-right-radius: 5px;
    padding: 15px 40px;
    line-height: 30px;
    font-weight: 400;
    font-size: 16px;
    display: none;
}
.answer h4:hover{
    color: #003060;
    background: #ffff37;
    transition: 0.5s;
}
.answer a{
    color: #006EFF;
    text-decoration: none;
}
.answer a:hover{
    color: aqua;
    transition: 0.5s;
}

@media (max-width: 860px){
    .answer .row{
        width: 90%;
    }
}
/*手機*/
@media screen and (max-width:450px){
    .answer{
        width: 100%;
    }
    .answer .row{
        width: 100%;
    }
}
/*推薦課程*/
.recommend{
    width: 100%;
    padding: 50px 0;
}
.recommend .content{
    max-width: 1100px;
    width: 90%;
    margin: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}
.recommend .content a{
    width: 300px;
    margin: 20px;
}
.recommend .content a img{
    width: 100%;
}




/*底部*/
footer{
    background:linear-gradient(90deg,#076991,#00415a);
    padding: 100px 0;
}
footer p{
    color: #fff;
    text-align: center;
    font-size: 18px;
}

@media(max-width: 450px){
    footer{
        padding: 50px 0 150px;
    }
    footer p{
        width: 90%;
        margin: auto;
        font-size: 14px;
    }
}
/*右側表單*/
.fixform{
    position: fixed;
    top: 300px;
    right: 0;
    z-index: 5;
}
@media screen and (max-width:450px){
    .fixform{
        display: none;
    }
}

/*go to top*/
#btn-back-to-top{
    position: fixed;
    bottom: 200px;
    right: 10px;
    display: none;
    color: #076991;
    background: unset;
    border: 0px;
    clip-path: circle(40%);
    opacity: 0.5;
    font-size: 40px;
    transition: 0.6s;
}
#btn-back-to-top:hover{
    opacity: 1;
    transition: 0.6s;
    transform: translateY(-5px);
}

@media screen and (max-width: 860px){
    #btn-back-to-top{
        bottom: 100px;
        right: 5px;
    }
}

@media screen and (max-width: 450px){
    #btn-back-to-top{
        bottom: 70px;
        right: 5px;
    }
}