I have modified the carousel.css to resize according to the resolution, it works well for me, tell me if it works for you too.
/* CAROUSEL SETTINGS */
/* Carousel Styles */
/* CUSTOMIZE THE CAROUSEL Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) { .carousel { }
.carousel-caption { bottom: 2rem; z-index: 10; }
.carousel-item > img { top: 0; left: 0; margin-top: 30px; }
.carousel-caption .hs-text { display: table-cell; vertical-align: middle; }
.carousel-caption .hs-text h1 { color: #fff; font-weight: 400; font-size: 70px; margin-bottom: 20px; position: relative; top: 30px; opacity: 0; }
.carousel-caption .hs-text h1 span { color: #fe821d; }
.carousel-caption .hs-text p { color: #fff; font-size: 20px; margin-bottom: 10px; position: relative; top: 20px; opacity: 0; }
.btn-mobile {background-color:#ef7f1a;border-color:#fe821d;box-shadow:none;color:#fff;width: 8em;height: 2.5em;font-size:19px;padding-bottom: 20px;}
.btn-mobile:hover{color:#fff;background-color:#e76901;border-color:#fe821d;box-shadow:0 5px 15px rgba(0,0,0,.05),0 4px 10px rgba(255,161,0,0.5)}
.btn-mobile.focus,.btn-mobile:focus{color:#fff;box-shadow:0 0 0 3px rgba(0,123,255,.15),0 3px 15px rgba(0,123,255,.2),0 2px 5px rgba(0,0,0,.1)}
.btn-mobile.disabled,.btn-mobile:disabled{color:#fff;background-color:#ef7f1a;border-color:#007bff;box-shadow:none;cursor:not-allowed}
.btn-mobile .h7 { vertical-align: middle; text-align: center; }
.featurette-divider { margin: 5rem 0; }
.featurette-heading { font-weight: 300; line-height: 1; letter-spacing: -.05rem; }
.carousel-indicators .active { background-color: #fe821d; }
.carousel-control .icon-prev, .carousel-control .icon-next, .carousel-control .fa-chevron-left, .carousel-control .fa-chevron-right { position: absolute; top: 50%; z-index: 5; display: inline-block; margin-top: -10px; }
.carousel-control .icon-prev, .carousel-control .fa-chevron-left { left: 50%; margin-left: -10px; }
.carousel-control .icon-next, .carousel-control .fa-chevron-right { right: 50%; margin-right: -10px; }
.carousel-control .icon-prev, .carousel-control .icon-next { width: 20px; height: 20px; font-family: serif; line-height: 1; }
}
/*Large devices (desktops, 992px and up) */ @media (min-width: 992px) and (max-width: 1199px) {
.carousel { }
.carousel-caption { bottom: 2rem; z-index: 10; }
.carousel-item > img { top: 0; left: 0; margin-top: 30px; }
.carousel-caption .hs-text { display: table-cell; vertical-align: middle; }
.carousel-caption .hs-text h1 { color: #fff; font-weight: 400; font-size: 50px; margin-bottom: 20px; position: relative; top: 30px; opacity: 0; }
.carousel-caption .hs-text h1 span { color: #fe821d; }
.carousel-caption .hs-text p { color: #fff; font-size: 19px; margin-bottom: 10px; position: relative; top: 20px; opacity: 0; }
.btn-mobile {background-color:#ef7f1a;border-color:#fe821d;box-shadow:none;color:#fff;width: 8em;height: 2.5em;font-size:15px;padding-bottom: 20px;}
.btn-mobile:hover{color:#fff;background-color:#e76901;border-color:#fe821d;box-shadow:0 5px 15px rgba(0,0,0,.05),0 4px 10px rgba(255,161,0,0.5)}
.btn-mobile.focus,.btn-mobile:focus{color:#fff;box-shadow:0 0 0 3px rgba(0,123,255,.15),0 3px 15px rgba(0,123,255,.2),0 2px 5px rgba(0,0,0,.1)}
.btn-mobile.disabled,.btn-mobile:disabled{color:#fff;background-color:#ef7f1a;border-color:#007bff;box-shadow:none;cursor:not-allowed}
.btn-mobile .h7 { vertical-align: middle; text-align: center; }
.featurette-divider { margin: 5rem 0; }
.featurette-heading { font-weight: 300; line-height: 1; letter-spacing: -.05rem; }
.carousel-indicators .active { background-color: #fe821d; }
.carousel-control .icon-prev, .carousel-control .icon-next, .carousel-control .fa-chevron-left, .carousel-control .fa-chevron-right { position: absolute; top: 50%; z-index: 5; display: inline-block; margin-top: -10px; }
.carousel-control .icon-prev, .carousel-control .fa-chevron-left { left: 50%; margin-left: -10px; }
.carousel-control .icon-next, .carousel-control .fa-chevron-right { right: 50%; margin-right: -10px; }
.carousel-control .icon-prev, .carousel-control .icon-next { width: 20px; height: 20px; font-family: serif; line-height: 1; }
}
/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) and (max-width: 991px) {
.carousel { }
.carousel-caption { bottom: 2rem; z-index: 10; }
.carousel-item > img { top: 0; left: 0; margin-top: 30px; }
.carousel-caption .hs-text { display: table-cell; vertical-align: middle; }
.carousel-caption .hs-text h1 { color: #fff; font-weight: 400; font-size: 40px; margin-bottom: 20px; position: relative; top: 30px; opacity: 0; }
.carousel-caption .hs-text h1 span { color: #fe821d; }
.carousel-caption .hs-text p { color: #fff; font-size: 18px; margin-bottom: 10px; position: relative; top: 20px; opacity: 0; }
.btn-mobile {background-color:#ef7f1a;border-color:#fe821d;box-shadow:none;color:#fff;width: 10em;height: 2.5em;font-size:10px;padding-bottom: 20px;}
.btn-mobile:hover{color:#fff;background-color:#e76901;border-color:#fe821d;box-shadow:0 5px 15px rgba(0,0,0,.05),0 4px 10px rgba(255,161,0,0.5)}
.btn-mobile.focus,.btn-mobile:focus{color:#fff;box-shadow:0 0 0 3px rgba(0,123,255,.15),0 3px 15px rgba(0,123,255,.2),0 2px 5px rgba(0,0,0,.1)}
.btn-mobile.disabled,.btn-mobile:disabled{color:#fff;background-color:#ef7f1a;border-color:#007bff;box-shadow:none;cursor:not-allowed}
.btn-mobile .h7 { vertical-align: middle; text-align: center; }
.featurette-divider { margin: 5rem 0; }
.featurette-heading { font-weight: 300; line-height: 1; letter-spacing: -.05rem; }
.carousel-indicators .active { background-color: #fe821d; }
.carousel-control .icon-prev, .carousel-control .icon-next, .carousel-control .fa-chevron-left, .carousel-control .fa-chevron-right { position: absolute; top: 50%; z-index: 5; display: inline-block; margin-top: -10px; }
.carousel-control .icon-prev, .carousel-control .fa-chevron-left { left: 50%; margin-left: -10px; }
.carousel-control .icon-next, .carousel-control .fa-chevron-right { right: 50%; margin-right: -10px; }
.carousel-control .icon-prev, .carousel-control .icon-next { width: 20px; height: 20px; font-family: serif; line-height: 1; }
}
/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) and (max-width: 767px) {
.carousel { }
.carousel-caption { bottom: 2rem; z-index: 10; }
.carousel-item > img { top: 0; left: 0; margin-top: 25px; }
.carousel-caption .hs-text { display: table-cell; vertical-align: middle; }
.carousel-caption .hs-text h1 { color: #fff; font-weight: 400; font-size: 30px; margin-bottom: 20px; position: relative; top: 30px; opacity: 0; }
.carousel-caption .hs-text h1 span { color: #fe821d; }
.carousel-caption .hs-text p { color: #fff; font-size: 12px; margin-bottom: 10px; position: relative; top: 20px; opacity: 0; }
.btn-mobile {background-color:#ef7f1a;border-color:#fe821d;box-shadow:none;color:#fff;width: 10em;height: 2.5em;font-size:10px;padding-bottom: 20px;}
.btn-mobile:hover{color:#fff;background-color:#e76901;border-color:#fe821d;box-shadow:0 5px 15px rgba(0,0,0,.05),0 4px 10px rgba(255,161,0,0.5)}
.btn-mobile.focus,.btn-mobile:focus{color:#fff;box-shadow:0 0 0 3px rgba(0,123,255,.15),0 3px 15px rgba(0,123,255,.2),0 2px 5px rgba(0,0,0,.1)}
.btn-mobile.disabled,.btn-mobile:disabled{color:#fff;background-color:#ef7f1a;border-color:#007bff;box-shadow:none;cursor:not-allowed}
.btn-mobile .h7 { vertical-align: middle; text-align: center; }
.featurette-divider { margin: 5rem 0; }
.featurette-heading { font-weight: 300; line-height: 1; letter-spacing: -.05rem; }
.carousel-indicators .active { background-color: #fe821d; }
.carousel-control .icon-prev, .carousel-control .icon-next, .carousel-control .fa-chevron-left, .carousel-control .fa-chevron-right { position: absolute; top: 50%; z-index: 5; display: inline-block; margin-top: -10px; }
.carousel-control .icon-prev, .carousel-control .fa-chevron-left { left: 50%; margin-left: -10px; }
.carousel-control .icon-next, .carousel-control .fa-chevron-right { right: 50%; margin-right: -10px; }
.carousel-control .icon-prev, .carousel-control .icon-next { width: 20px; height: 20px; font-family: serif; line-height: 1; }
}
/* Extra small devices (portrait phones, less than 576px) */
@media (max-width: 575px) {
.carousel { }
.carousel-caption { bottom: 2rem; z-index: 10; }
.carousel-item > img { top: 0; left: 0; margin-top: 25px; }
.carousel-caption .hs-text { display: table-cell; vertical-align: middle; }
.carousel-caption .hs-text h1 { color: #fff; font-weight: 400; font-size: 18px; margin-bottom: 20px; position: relative; top: 30px; opacity: 0; }
.carousel-caption .hs-text h1 span { color: #fe821d; }
.carousel-caption .hs-text p { color: #fff; font-size: 8px; margin-bottom: 10px; position: relative; top: 20px; opacity: 0; }
.btn-mobile {background-color:#ef7f1a;border-color:#fe821d;box-shadow:none;color:#fff;width: 10em;height: 2.5em;font-size:8px;padding-bottom: 20px;}
.btn-mobile:hover{color:#fff;background-color:#e76901;border-color:#fe821d;box-shadow:0 5px 15px rgba(0,0,0,.05),0 4px 10px rgba(255,161,0,0.5)}
.btn-mobile.focus,.btn-mobile:focus{color:#fff;box-shadow:0 0 0 3px rgba(0,123,255,.15),0 3px 15px rgba(0,123,255,.2),0 2px 5px rgba(0,0,0,.1)}
.btn-mobile.disabled,.btn-mobile:disabled{color:#fff;background-color:#ef7f1a;border-color:#007bff;box-shadow:none;cursor:not-allowed}
.btn-mobile .h7 { vertical-align: middle; text-align: center; }
.featurette-divider { margin: 5rem 0; }
.featurette-heading { font-weight: 300; line-height: 1; letter-spacing: -.05rem; }
.carousel-indicators .active { background-color: #fe821d; }
.carousel-control .icon-prev, .carousel-control .icon-next, .carousel-control .fa-chevron-left, .carousel-control .fa-chevron-right { position: absolute; top: 50%; z-index: 5; display: inline-block; margin-top: -10px; }
.carousel-control .icon-prev, .carousel-control .fa-chevron-left { left: 50%; margin-left: -10px; }
.carousel-control .icon-next, .carousel-control .fa-chevron-right { right: 50%; margin-right: -10px; }
.carousel-control .icon-prev, .carousel-control .icon-next { width: 20px; height: 20px; font-family: serif; line-height: 1; }
}