.introduction {
  height: 800px;
  background: #1e5bfa;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  width: 100%;
  position: relative;
  overflow: hidden;
}

.introduction::before {
  content: "";
  width: 500px;
  height: 500px;
  border-radius: 100%;
  border: 100px solid rgba(255, 255, 255, 0.13);
  position: absolute;
  bottom: 0;
  left: -200px;
}

.introduction__slider {
  height: 100%;
}

.introduction__slider-controls {
  height: 100px;
  width: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  gap: 5px;
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: start;
      -ms-flex-pack: start;
          justify-content: flex-start;
}

.introduction__slider-pr, .introduction__slider-nx {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  width: 50px;
  height: 25px;
  background: url(../icons/arrow-slider.svg) no-repeat center center;
  cursor: pointer;
}

.introduction__slider-nx {
  -webkit-transform: rotate(180deg);
      -ms-transform: rotate(180deg);
          transform: rotate(180deg);
}

.introduction__slider-pg {
  font-style: normal;
  font-weight: 800;
  font-size: 56px;
  line-height: 120%;
  -webkit-text-stroke: 1px #ffffff;
  -webkit-text-fill-color: transparent;
}

.introduction__item {
  height: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  opacity: 0 !important;
}

.introduction__item-desc {
  width: 55%;
}

.introduction__item-title {
  font-style: normal;
  font-weight: bold;
  font-size: 56px;
  line-height: 120%;
  color: #ffffff;
  margin-bottom: 20px;
}

.introduction__item-text {
  font-style: normal;
  font-weight: 500;
  font-size: 20px;
  line-height: 140%;
  color: #ffffff;
  margin-bottom: 50px;
}

.introduction__item-buttons {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: start;
      -ms-flex-pack: start;
          justify-content: flex-start;
  gap: 15px;
}

.introduction__item-button {
  padding: 15px 45px;
  border: 1px solid #ffffff;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  border-radius: 5px;
  -webkit-transition: 0.3s;
  -o-transition: 0.3s;
  transition: 0.3s;
  font-style: normal;
  font-weight: 500;
  font-size: 14px;
  line-height: 120%;
  cursor: pointer;
  color: #ffffff;
}

.introduction__item-button:hover {
  background: #ffffff;
  color: #263238;
}

.introduction__item-button.white {
  background: #ffffff;
  color: #263238;
}

.introduction__item-button.white:hover {
  background: transparent;
  color: #ffffff;
}

.introduction__item-img {
  width: 45%;
}

.introduction__item-img img {
  width: 100%;
  -o-object-fit: contain;
     object-fit: contain;
  -webkit-animation: breathing 4s ease 1.5s infinite normal;
          animation: breathing 4s ease 1.5s infinite normal;
}

.introduction__bglines {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -ms-flex-pack: distribute;
      justify-content: space-around;
}

.introduction__bglines span {
  height: 100%;
  width: 3px;
  background: rgba(255, 255, 255, 0.15);
  position: relative;
}

.introduction__bglines span::before {
  content: "";
  background: #1e5bfa;
  border: 2px solid rgba(255, 255, 255, 0.7);
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  width: 25px;
  height: 25px;
  position: absolute;
  top: 50px;
  left: 50%;
  -webkit-transform: translateX(-50%);
      -ms-transform: translateX(-50%);
          transform: translateX(-50%);
  border-radius: 100%;
  -webkit-transition: 0.3s;
  -o-transition: 0.3s;
  transition: 0.3s;
}

.introduction__bglines span:nth-child(1)::before {
  display: none;
}

.introduction__bglines span:nth-child(2)::before {
  -webkit-animation: moving 45s ease infinite normal;
          animation: moving 45s ease infinite normal;
}

.introduction__bglines span:nth-child(3)::before {
  -webkit-animation: moving 22s ease infinite normal;
          animation: moving 22s ease infinite normal;
}

.introduction__bglines span:nth-child(4)::before {
  -webkit-animation: moving 80s ease infinite normal;
          animation: moving 80s ease infinite normal;
}

.introduction__bglines span:nth-child(5)::before {
  -webkit-animation: moving 15s ease infinite normal;
          animation: moving 15s ease infinite normal;
}

@-webkit-keyframes moving {
  0% {
    top: 5%;
  }
  25% {
    top: 50%;
  }
  60% {
    top: 100%;
  }
  100% {
    top: 5%;
  }
}

@keyframes moving {
  0% {
    top: 5%;
  }
  25% {
    top: 50%;
  }
  60% {
    top: 100%;
  }
  100% {
    top: 5%;
  }
}

@-webkit-keyframes breathing {
  0% {
    -webkit-transform: scale(0.95);
    -ms-transform: scale(0.95);
    transform: scale(0.95);
  }
  25% {
    -webkit-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
  }
  60% {
    -webkit-transform: scale(0.95);
    -ms-transform: scale(0.95);
    transform: scale(0.95);
  }
  100% {
    -webkit-transform: scale(0.95);
    -ms-transform: scale(0.95);
    transform: scale(0.95);
  }
}

@keyframes breathing {
  0% {
    -webkit-transform: scale(0.95);
    -ms-transform: scale(0.95);
    transform: scale(0.95);
  }
  25% {
    -webkit-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
  }
  60% {
    -webkit-transform: scale(0.95);
    -ms-transform: scale(0.95);
    transform: scale(0.95);
  }
  100% {
    -webkit-transform: scale(0.95);
    -ms-transform: scale(0.95);
    transform: scale(0.95);
  }
}

.swiper {
  height: 100%;
}

.swiper-slide-active {
  opacity: 1 !important;
}

.swiper-slide-active .introduction__item-title {
  -webkit-animation: fadeInLeft;
          animation: fadeInLeft;
  -webkit-animation-duration: 0.5s;
          animation-duration: 0.5s;
}

.swiper-slide-active .introduction__item-text {
  -webkit-animation: fadeInLeft;
          animation: fadeInLeft;
  -webkit-animation-duration: 1s;
          animation-duration: 1s;
}

.swiper-slide-active .introduction__item-buttons {
  -webkit-animation: fadeInLeft;
          animation: fadeInLeft;
  -webkit-animation-duration: 1.5s;
          animation-duration: 1.5s;
}

.swiper-slide-active .introduction__item-img {
  -webkit-animation: fadeInRight;
          animation: fadeInRight;
  -webkit-animation-duration: 1.5s;
          animation-duration: 1.5s;
}

@media (max-width: 992px) {
  .introduction {
    height: unset;
    padding-top: 90px;
  }
  .introduction::before {
    width: 400px;
    height: 400px;
  }
  .introduction__item {
    -webkit-box-orient: vertical;
    -webkit-box-direction: reverse;
        -ms-flex-direction: column-reverse;
            flex-direction: column-reverse;
  }
  .introduction__item-desc {
    width: 100%;
  }
  .introduction__item-title {
    font-size: 46px;
    text-align: center;
  }
  .introduction__item-desc {
    font-size: 16px;
    text-align: center;
    margin-bottom: 20px;
  }
  .introduction__item-buttons {
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    margin-bottom: 90px;
  }
  .introduction__item-img {
    width: 50%;
  }
  .introduction__slider {
    -webkit-box-pack: justify;
        -ms-flex-pack: justify;
            justify-content: space-between;
  }
  .introduction__slider-pr {
    -webkit-box-ordinal-group: 2;
        -ms-flex-order: 1;
            order: 1;
  }
  .introduction__slider-pg {
    -webkit-box-ordinal-group: 3;
        -ms-flex-order: 2;
            order: 2;
    width: unset;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    text-align: center;
  }
  .introduction__slider-nx {
    -webkit-box-ordinal-group: 4;
        -ms-flex-order: 3;
            order: 3;
  }
  .introduction__bglines span:nth-child(4) {
    display: none;
  }
}

@media (max-width: 768px) {
  .introduction::before {
    bottom: -60px;
    left: -250px;
  }
  .introduction__item-title {
    font-size: 36px;
  }
  .introduction__bglines span:nth-child(1) {
    display: none;
  }
}

@media (max-width: 576px) {
  .introduction__item-title {
    font-size: 26px;
    line-height: 140%;
    margin-bottom: 15px;
  }
  .introduction__item-desc {
    font-size: 14px;
    line-height: 140%;
  }
  .introduction__item-buttons {
    margin-bottom: 80px;
  }
  .introduction__slider-controls {
    height: auto;
    bottom: 20px;
    padding: 0 40px;
  }
  .introduction__slider-pg {
    font-size: 36px;
  }
}