.client_box {
  padding: 80px 0 120px 0;
}

.bg_box {
  background-image: url(../image/about/3fca5965bf3edd17a2e9617d4660204.png);
  background-position: center center;
  background-repeat: no-repeat;
  background-size: 100% 100%;
  /* background-attachment: fixed;
  perspective: 1000px; */
}

.client h4 {
  margin: 0 0 60px 0;
  text-align: center;
}

.client ul {
  flex-wrap: wrap;
}

.client ul li {
  margin: 0 0 40px 0;
  padding: 15px 35px;
  width: calc(100%/5.5);
  background-color: #fff;
  border-radius: 10px;
}

.client ul li .p_box img {
  display: block;
  max-width: 100%;
  height: auto;
}

@media screen and (max-width: 1680px) {
  .client_box {
    padding: 70px 0 110px 0;
  }

  .client h4 {
    margin: 0 0 50px 0;
    font-size: 32px;
  }

  .client ul li {
    margin: 0 0 30px 0;
    padding: 15px 25px;
  }
}

@media screen and (max-width: 1600px) {
  .client_box {
    padding: 60px 0 100px 0;
  }

  .client h4 {
    margin: 0 0 40px 0;
    font-size: 28px;
  }

  .client ul li {
    margin: 0 0 20px 0;
    padding: 15px 20px;
  }
}

@media screen and (max-width: 1440px) {
  .client_box {
    padding: 50px 0 90px 0;
  }

  .client h4 {
    margin: 0 0 30px 0;
    font-size: 26px;
  }

  .client ul li {
    margin: 0 0 15px 0;
  }
}

@media screen and (max-width: 1366px) {
  .client_box {
    padding: 40px 0 80px 0;
  }

  .client h4 {
    margin: 0 0 20px 0;
    font-size: 24px;
  }
}

@media screen and (max-width: 1280px) {
  .client_box {
    padding: 30px 0 70px 0;
  }

  .client h4 {
    margin: 0 0 15px 0;
    font-size: 22px;
  }
}

@media screen and (max-width: 1024px) {
  .client_box {
    padding: 20px 0 60px 0;
  }

  .client h4 {
    font-size: 20px;
  }
}

@media screen and (max-width: 980px) {
  .client_box {
    padding: 15px 0 50px 0;
  }

  .client h4 {
    font-size: 18px;
  }
}

@media screen and (max-width: 768px) {
  .client_box {
    padding: 15px 0 40px 0;
  }

  .client h4 {
    font-size: 16px;
  }

  .client ul li {
    width: calc(100%/3.5);
  }
}

@media screen and (max-width: 640px) {
  .client_box {
    padding: 15px 0 30px 0;
  }
}

@media screen and (max-width: 375px) {
  .client_box {
    padding: 15px 0 20px 0;
  }
}