* {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  font-family: 'Roboto', Arial, sans-serif;
  --bs-card-border-width: 0px!important;
}

.aWhite {
  text-decoration: none;
  color: white;
}

.video-box {
  position: relative;
  overflow: hidden;
}

.video-box iframe {
  position: absolute;
  top: 0px;
  left: 0;
  width: 0;
  height: 0;
  z-index: -1;
}

.video-content {
  position: relative;
  color: #fff;
  padding: 50px;
  font-size: 20px;
}

.video-content:before {
  z-index: -1;
  content: '';
  position: absolute;
  top: 0px;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000;
  opacity: 0.5;
}

/* slide */

.carousel-control {
  padding-top: 10%;
  width: 5%;
}

.thumbnail {
  width: 100px;
  height: 100px;
  background-color: skyblue;
  text-align: center;
  color: white;
  font-size: 30px;
}



/* для видео блока */
.about {
  padding: 300px 0;
  background-color: #45474b;
  color: #fff;
  overflow: hidden;
  position: relative;
}

/* .about-title {
    font-family: sans-serif;
    font-size: 70px;
    text-align: center;
    position: relative;
    opacity: .5;
  } */
/* VIDEO */
.video {
  top: 50%;
  width: 1938px;
  transform: translate(-50%, -50%);
  opacity: 0.1;
  left: 50%;
  z-index: 0;
  position: absolute;
}

.about-header {
  position: absolute;
  top: 0;
  width: 100%;
  height: 110px;
  -webkit-background-size: cover;
  background-size: cover;
  background: url(C:\OpenServer\domains\localhost\service\img\videologo.png) 0 top no-repeat;
}

.about-footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 126px;
  -webkit-background-size: cover;
  background-size: cover;
  background: url(C:\OpenServer\domains\localhost\service\img\videologo.pngimg/videologo.png) 0 top no-repeat;
}

.about-header-bg-2 {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 1;
  transform: translate(-50%, -100%);
  transition: transform 0.9s 0.2s ease;
  will-change: transform;
  transform: translate(-50%, 0);
}

@media (max-width: 768px) {
  .about {
    background: url(C:\OpenServer\domains\localhost\service\img\videologo.png) 0 top no-repeat #0e438b;
    -webkit-background-size: cover;
    background-size: cover;
  }

  .video,
  .about-header,
  .about-footer,
  .about-header-bg-2 {
    display: none;
  }
}

@media (max-width: 480px) {
  .about-title {
    font-size: 40px;
  }
}