@font-face { 
  font-family: Source Han Serif SC; /*这里是说明调用来的字体名字*/ 
  src: url('./SourceHanSerifCN-Regular.otf'); /*这里是字体文件路径*/ 
}

body {
  font-family: Source Han Serif SC sans-serif;
  font-size: 16px;
  min-height: 100vh;
  background: #F1EDEA;
  box-sizing: border-box;
  color: #fff;
}

.preloader {
  position: fixed;
  background-color: var(--ostech-black, #F1EDEA);
  background-position: center center;
  background-repeat: no-repeat;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9991;
  display: -webkit-box;
  display: flex;
  -webkit-box-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  align-items: center;
  text-align: center;
}
.preloader__image {
  -webkit-animation-fill-mode: both;
  animation-fill-mode: both;
  -webkit-animation-name: flipInY;
  animation-name: flipInY;
  -webkit-animation-duration: 2s;
  animation-duration: 2s;
  -webkit-animation-iteration-count: infinite;
  animation-iteration-count: infinite;
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 60px auto;
  width: 100%;
  height: 100%;
}

.full-bg {
  background-size: 100% 100%;
  background-repeat: no-repeat;
}

.header {
  position: relative;
  height: 100vh;
  background-image: url(../images/bg1.png);
  background-size: cover;
  margin-bottom: 20px;
  padding: 30px 20px;
}

.title {
  font-weight: bold;
  font-size: 1.5rem;
}

.mb-h {
  margin-bottom: 35vw;
}

.mb-s {
  margin-bottom: 5vw;
}

.banner {
  width: 50%;
  height: auto;
  object-fit: cover;
  position: absolute;
  right: 0;
  top: 30%;
}

.btn1 {
  width: 160px;
  height: 36px;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #25D366;
  border-radius: 20px;
}

.h-center {
  margin-bottom: 35vw;
}

.h-bottom {
  display: flex;
  justify-content: space-around;
}

.h-b-t {
  margin-bottom: 30px;
}

.h-bottom p {
  margin-bottom: 10px;
  font-size: 14px;
}

.img1 {
  width: 35%;
  height: auto;
  object-fit: contain;
}

.j-c {
  display: flex;
  align-items: center;
}

.j-c:nth-child(1) {
  margin-bottom: 30px;
}

.icon1 {
  width: 20px;
  height: 20px;
  margin-right: 10px;
}

.btn1 img {
  width: 24px;
  height: 24px;
  margin-left: 10px;
}

.main-content {
  position: relative;
  padding: 20px;
}

.t-content-bg {
  background: url('../images/bg2.png');
  background-size: contain;
  height: 100px;
  text-align: center;
  padding: 0 30px;
  margin-bottom: 20px;
  background-repeat: no-repeat;
  color: #000;
  font-weight: bold;
  font-size: 24px;
  display: flex;
  align-items: center;
}

.t-content1 {
  border-radius: 20px;
  background-color: #BC9677;
  margin-bottom: 50px;
}

.p-20 {
  padding: 20px;
}

.img2 {
  width: 100%;
  height: auto;
  border-bottom-left-radius: 20px;
  border-bottom-right-radius: 20px;
}

.img3 {
  width: 100%;
  height: auto;
  margin-bottom: -20px;
}

.t-content2 {
  margin-bottom: 50px;
}
.t-content3 {
  background: url('../images/bg3.png');
  background-size: contain;
  margin-bottom: 20px;
  color: #000;
  text-align: center;
  font-weight: bold;
}
.img4 {
  width: 49%;
}
.img5 {
  width: 49%;
}
.img6, .img7, .img8 {
  width: 100%;
  height: auto;
  margin-bottom: 20px;
}

.img8 {
  margin-bottom: 50px;
}

.t-content4 {
  height: 250px;
  position: relative;
  color: #000;
  text-align: center;
  font-weight: bold;
}

.other-2 {
  width: 100%;
  color: #fff;
  padding: 25px 0;
  margin-top: 20px;
}

.img9 {
  width: 100%;
  height: auto;
  position: absolute;
  bottom: -10%;
  z-index: -1;
  left: 0;
}
.img10 {
  width: 100%;
  height: auto;
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: -1;
}

@media screen and (max-width: 700px) {
  .container-xl {
    --bs-gutter-x: 0;
  }
}



@media screen and (min-width: 1200px) {
  .bg2 {
    width: 40vw;
  }
  .icons-title {
    font-size: 16px;
  }
}
@media screen and (min-width: 1800px) {
  .bg2 {
    width: 30vw;
    right: 12%;
    bottom: 13%;
  }
}