.banner {
  width: 100%;
  height: 460px;
  position: relative;
}

.banner_bg {
  width: 100%;
  height: 100%;
}

.banner_bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner_content {
  position: absolute;
  top: 50%;
  left: 40%;
  transform: translate(-50%, -50%);
}

.banner_content h2 {
  font-size: 50px;
  color: #fff;
  margin-bottom: 20px;
  font-weight: 700;
}

.banner_content p {
  font-size: 50px;
  color: #fff;
  font-weight: 700;
}

.about {
  width: 100%;
  padding: 60px 0;

}

.about_item {
  width: 100%;
  height: 100%;
  text-align: center;
}


.about_item h2 {
  font-size: 26px;
  font-weight: 700;
  color: #282B29;
  margin-bottom: 40px;
}

.about_text {
  width: 100%;
  height: 100%;
}

.about_text p {
  font-size: 18px;
  line-height: 32px;
  color: #6E706F;
  margin-bottom: 40px;
}

.about_pic {
  width: 100%;
  height: auto;
  margin-bottom: 50px;
}

.about_pic ul {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  align-items: center;
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.about_pic li {
  width: 100%;
  height: 100%;
}

.about_pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about_box {
  margin-top: 60px;
  overflow: hidden;
  width: 100%;
  height: auto;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
}

.about_box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about_box_tex {
  padding: 20px 0;
  width: 100%;
  height: 100%;
}

.about .certification {
  width: 100%;
  height: auto;
  margin-bottom: 40px;
}

.certification img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about_btn {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.about_btn a {
  padding: 12px 30px;
  width: 180px;
  height: 100%;
  font-size: 17px;
  color: #fff;
  font-weight: 700;
  background-color: #485030;
  border-radius: 48px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.about_btn a i {
  font-size: 16px;
  margin-left: 10px;
  font-weight: 400;
}

/* 响应式布局 - 大屏幕 */
@media (max-width: 1200px) {

  /* 轮播图 */
  .banner {
    height: 388px;
  }

  .banner_content {
    top: 50%;
    left: 50%;
  }

  .banner_content h2,
  .banner_content p {
    font-size: 40px;
  }

  /* 关于我们 */
  .about {
    padding: 50px 30px;
  }

  .about_item h2 {
    font-size: 24px;
    margin-bottom: 30px;
  }

  .about_text p {
    font-size: 16px;
    line-height: 28px;
    margin-bottom: 30px;
  }

  .about_pic ul {
    gap: 15px;
    margin-bottom: 40px;
  }

  .about_box {
    margin-top: 50px;
    gap: 15px;
  }

  .about .certification {
    height: auto;
  }

  .about_btn a {
    padding: 10px 25px;
    font-size: 16px;
  }

  /* 非轮播图区域图片响应式设置 */
  .about_pic img,
  .about_box img,
  .certification img {
    object-fit: contain;
  }
}

/* 响应式断点 - 平板 (768px-991px) */
@media (min-width: 768px) and (max-width: 991px) {

  /* 轮播图 */
  .banner {
    height: 299px;
  }

  .banner_content {
    top: 60%;
    left: 50%;
    transform: translate(-50%, -50%);
  }

  .banner_content h2,
  .banner_content p {
    font-size: 30px;
    margin-bottom: 15px;
  }

  /* 关于我们 */
  .about {
    padding: 40px 30px;
  }

  .about_item h2 {
    font-size: 22px;
    margin-bottom: 25px;
  }

  .about_text p {
    font-size: 15px;
    line-height: 26px;
    margin-bottom: 25px;
  }

  .about_pic ul {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 30px;
  }

  .about_box {
    margin-top: 40px;
    flex-direction: column;
    gap: 10px;
  }

  .about_btn a {
    padding: 8px 20px;
    font-size: 15px;
  }

  /* 非轮播图区域图片响应式设置 */
  .about_pic img,
  .certification img {
    object-fit: contain;
  }

  .about_box img {
    display: none;
  }
}

/* 响应式断点 - 移动端 (<768px) */
@media (max-width: 768px) {

  /* 轮播图 */
  .banner {
    height: 190px;
  }

  .banner_content {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }

  .banner_content h2,
  .banner_content p {
    display: none;
  }

  /* 关于我们 */
  .about {
    padding: 30px 20px;
  }

  .about_item h2 {
    font-size: 24px;
    margin-bottom: 20px;
  }

  .about_text p {
    font-size: 18px;
    line-height: 24px;
    margin-bottom: 20px;
  }

  .about_pic ul {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-bottom: 20px;
  }

  .about_box_tex {
    padding: 0;
  }

  .about_box {
    margin-top: 30px;
    flex-direction: column;
    gap: 10px;
  }

  .about_btn a {
    padding: 8px 20px;
    font-size: 14px;
    width: 160px;
  }

  /* 非轮播图区域图片响应式设置 */
  .about_pic img,
  .certification img {
    object-fit: contain;
  }
}