body,
html {
  margin: 0;
  padding: 0;
  font-family: Helvetica, Arial, sans-serif !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: rgba(33, 37, 41, 0.75);
}

a {
  text-decoration: none;
  color: rgba(33, 37, 41, 0.75);
}
a:hover {
  color: #2657a6;
}

a:active,
a:focus {
  outline: 0;
}

.header-bg {
  background-color: #aadbe5;
}

.nav-pills .nav-link.active {
  background-color: #ebf9fc;
}

.banner-index {
  background-color: #e6eff1;
  height: 17.5rem;
}

.banner-index h1 {
  color: #7093be;
  font-size: 3rem;
}

.banner-index h3 {
  margin-top: -1rem;
  margin-bottom: 3rem;
  color: #1e2025;
  font-weight: 400;
}

.classroom,
.res-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #1e2026;
}

.classroom div,
.res-box div {
  width: 22.375rem;
  line-height: 2.5rem;
}

.sub-title,
div.sub-title {
  font-size: 2rem;
  line-height: 3rem;
  color: #646464;
}

.title,
div.title {
  font-size: 2.5rem;
  line-height: 4rem;
  color: #000;
}

img.class-img {
  width: 22.375rem;
}

.earth {
  display: none;
}

.bd-placeholder-img {
  font-size: 1.125rem;
  text-anchor: middle;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}

.cover-img {
  width: 100%;
  height: 16.75rem;
}

.cover-title {
  padding: 4px 10px;
  background-color: #000;
  color: #fff;
  font-size: 1rem;
  text-align: center;
  white-space: nowrap;
  word-break: break-all;
  text-overflow: ellipsis;
  overflow: hidden;
}

.xrverse-box {
  background-color: #474747;
  padding: 2rem;
  display: flex;
  flex-direction: column;

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #a8a8a8;
  line-height: 2.5rem;
}

.xrverse-content div.sub-title {
  color: #a8a8a8;
}

.xrverse-content div.title {
  color: #fff;
}

.xrverse-content a.btn {
  padding: 0.375rem 2rem;
}

.xrverse-content a.btn-demo2 {
  margin-right: 0.375rem;
}

.btn-demo {
  color: #000000;
  background-color: #aadbe5;
}

.btn-demo:hover,
.btn-demo:focus,
.btn-demo:active,
.btn-demo.active,
.open .dropdown-toggle.btn-demo {
  color: #000000;
  background-color: #4cb2c7;
}

.btn-demo2 {
  color: #ffffff;
  background-color: #7d9095;
}

.btn-demo2:hover,
.btn-demo2:focus,
.btn-demo2:active,
.btn-demo2.active,
.open .dropdown-toggle.btn-demo2 {
  color: #ffffff;
  background-color: #66909c;
}

.btn-demo3 {
  color: #ffffff;
  background-color: #9e9761;
}

.btn-demo3:hover,
.btn-demo3:focus,
.btn-demo3:active,
.btn-demo3.active,
.open .dropdown-toggle.btn-demo2 {
  color: #ffffff;
  background-color: #bdae3b;
}

.banner-inner {
  background-color: #e6eff1;
  text-align: center;
  padding: 1rem 0 0.5rem 0;
}

.banner-inner h3 {
  color: #1e2025;
  font-weight: 400;
  margin-bottom: 1rem;
}

.img-content {
  text-align: center;
}

.img-content img {
  width: 100%;
}

.res-tit button {
  font-size: 2rem;
  margin-bottom: 1rem;
}
.btn-tit {
  color: #000;
  background-color: #ffcb8e;
  border: #ffcb8e;
  padding: 0.25rem 1.5rem;
}
.res-tit p {
  font-size: 1.5rem;
  color: #474747;
}

.res-condition {
  background-color: #f0f0f0;
}

.res-condition button {
  background-color: #c2c2c2;
  border: #c2c2c2;
  padding: 0.25rem 1.5rem;
}

.res-condition .sel a {
  background-color: #d9d9d9;
  border: #d9d9d9;
  padding: 0.25rem 1.5rem;
  margin-left: 1.5rem;
}

.res-condition .sel a.active,
.res-condition .sel a:hover,
.res-condition .sel a:focus,
.res-condition .sel a:active {
  background-color: #c2c2c2;
}

.preview-iframe {
  width: 100%;
  height: 40rem;
  padding: 0;
  margin: 0;
  border: none;
  overflow: scroll;
  -webkit-overflow-scrolling: touch;
}

@media screen and (min-width: 768px) {
  .cover-img {
    height: 10.75rem;
  }
}

@media screen and (min-width: 992px) {
  .banner-lg {
    height: 10rem;
  }
  .banner-index-lg {
    padding-top: 8rem;
    height: 43.75rem;
  }
  .banner-index h1 {
    font-size: 6rem;
  }
  .cover-img {
    height: 12.75rem;
  }
  .xrverse-box {
    flex-direction: row-reverse;
  }
  .xrverse-img img {
    width: 436px;
  }
  .xrverse-content {
    margin-left: 8rem;
  }
}

@media screen and (min-width: 1200px) {
  .cover-img {
    height: 16.75rem;
  }
  .xrverse-content {
    margin-left: 8rem;
  }
  .xrverse-img img {
    width: 654px;
  }
}

@media screen and (min-width: 1400px) {
  .xrverse-img img {
    width: 100%;
  }
}

@media screen and (width: 1920px) {
  .classroom {
    align-items: flex-start;
    padding-left: 135px;
  }

  .classroom div.earth {
    display: block;
    position: relative;
    width: 100%;
    height: 2px;
  }
  .earth img {
    width: 1444px;
    position: absolute;
    right: 0;
    top: -1020px;
  }
  .xrverse-content {
    margin-left: 15rem;
  }
}