:root {
  --yichen-about-gap: 180px;
}

.yichen_about {
  position: relative;
}

.yichen_about_background_img {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  object-fit: cover;
}

.yichen_about_main {
  position: relative;
  z-index: 3;

  background: #e2e2e2;
  opacity: 0.9;
}

.yichen_about_content_wrapper {
  padding: 90px 0;
}

.yichen_about_title {
  font-size: var(--title-size-h2);
  font-style: normal;
  font-weight: 700;
  line-height: normal;

  text-align: center;

  width: fit-content;
  margin: 0 auto;
  position: relative;
}
.yichen_about_content_wrapper .title2{
    text-align: center;
    margin-top: 15px;
}
.yichen_about_title::before{
  content: "";
  width: 64px;
  height: 4px;
  background: #000;
  position: absolute;
  top: 50%;
  left: -16px;
  transform: translate( -100%, -50% );
}

.yichen_about_title::after{
  content: "";
  width: 64px;
  height: 4px;
  background: #000;
  position: absolute;
  top: 50%;
  right: -16px;
  transform: translate( 100%, -50% );
}

.yichen_about_content {
  color: #000;
  font-size: var(--text-size);
  font-style: normal;
  font-weight: 300;
  line-height: normal;
  margin-top: 90px;
}
.yichen_about_content p{
  font-size: 18px;
  line-height: 1.7;
}

@media screen and (max-width: 1200px) {
  :root {
    --yichen-about-gap: 120px;
  }
}

@media screen and (max-width: 992px) {
  :root {
    --yichen-about-gap: 80px;
  }

  .yichen_about_title::before{
    width: 48px;
    height: 3px;
  }

  .yichen_about_title::after{
    width: 48px;
    height: 3px;
  }
}

@media screen and (max-width: 768px) {
  :root {
    --yichen-about-gap: 60px;
  }
}

@media screen and (max-width: 576px) {
  :root {
    --yichen-about-gap: 40px;
  }

  .yichen_about_title::before{
    width: 32px;
    height: 2px;
    left: -8px;
  }

  .yichen_about_title::after{
    width: 32px;
    height: 2px;
    right: -8px;
  }
}