.nav-top{
    background-color: initial;
}
.main{
    top: initial;
    height: initial;
}
.carousel-inner img{
    width: 100%;
    height: 700px;
}
.carousel-caption{
    right: auto;
    text-align: left;
}
.carousel-caption h1{
    font-size: 40px;
}
.carousel-caption a{
    font-size: 15px;
    font-family: 'Karla', sans-serif;
    font-weight: bold;
    padding: 10px 30px 10px 30px;
    color: #fff;
    background-color: black;
    text-decoration: none;
    cursor: pointer;
}
.middle{
    transition: .5s ease;
    opacity: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    text-align: center;
}
.ahref:hover .image{
    opacity: 0.3;
}
.ahref:hover .middle{
    opacity: 1;
}
.middle .text{
    font-size: 20px;
    color: #000;
}
.middle .line{
    text-decoration: underline;
    color: #000;
}
@media only screen and (max-width: 768px) {
    .carousel-inner img{
        height: 300px;
    }
}