.main-content {
  position: relative;
  z-index: 0;
}

.main-content:before {
  content: '';
  background: linear-gradient(0deg, #cee4f2 0%, white 100%);
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 365px;
  z-index: -1;
}

#sec1 {
  padding: 170px 0 127px;
  color: #fff;
  background-image: url("../img/about-aio/sec1_bg@2x.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: 50%;
}

#sec1 h2 {
  font-size: 60px;
  line-height: 1.79;
  letter-spacing: 0.09em;
  font-weight: 700;
  margin-bottom: 6px;
}

#sec1 .txt {
  max-width: 840px;
  width: 100%;
  font-size: 23px;
  line-height: 1.6;
}

@media screen and (max-width: 980px) {
  #sec1 h2 {
    font-size: 52px;
  }
  #sec1 .txt {
    font-size: 19px;
  }
}

@media screen and (max-width: 767px) {
  #sec1 {
    padding: 15vw 0;
    background-image: url("../img/about-aio/sec1_bg_sp@2x.jpg");
    min-height: 96vw;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  #sec1 h2 {
    font-size: 5.3vw;
    line-height: 1.625;
    margin-bottom: 3vw;
  }
  #sec1 .txt {
    max-width: none;
    font-size: 13px;
    font-weight: 500;
    line-height: 1.76;
    letter-spacing: 0.2em;
  }
}

#sec2 {
  padding-bottom: 157px;
}

#sec2 .row1 {
  padding: 150px 0 82px;
}

#sec2 .row1 h2 {
  font-size: 41px;
  margin-bottom: 51px;
}

#sec2 .row1 h3 {
  font-size: 30px;
  line-height: 1.74;
  margin-bottom: 12px;
}

#sec2 .row1 .txt {
  font-size: 20px;
  line-height: 2;
}

#sec2 .row2 {
  position: relative;
  z-index: 0;
  padding: 83px 20px 72px;
  margin-bottom: 77px;
}

#sec2 .row2:after {
  content: '';
  background-image: url("../img/about-aio/sec2_bg@2x.png");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center top;
  position: absolute;
  left: -23px;
  right: -39px;
  top: 0;
  bottom: 0;
  z-index: -1;
}

#sec2 .row2 .fz30 {
  font-size: 30px;
  line-height: 1.74;
  font-weight: 700;
  color: #595757;
}

#sec2 .row2 h4 {
  margin-bottom: 32px;
}

#sec2 .row2 .txt {
  font-size: 20px;
  line-height: 2;
}

#sec2 .row2 .txt1 {
  margin-bottom: 59px;
}

#sec2 .row2 .row-phone {
  max-width: 962px;
  width: 100%;
  margin: 0 auto 47px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  column-gap: 20px;
}

#sec2 .row2 .row-phone .phone1 {
  width: 253px;
}

#sec2 .row2 .row-phone .col-phone2 {
  max-width: 635px;
  width: 100%;
  display: flex;
  align-items: center;
}

#sec2 .row2 .row-phone .col-phone2 .phone2 {
  width: 253px;
  margin-right: -124px;
  position: relative;
  z-index: 1;
}

#sec2 .row2 .row-phone .col-phone2 .box {
  max-width: 511px;
  width: calc(100% - 130px);
  background: #cbd5dc;
  border-radius: 15px;
  padding: 58px 30px 64px 145px;
}

#sec2 .row2 .row-phone .col-phone2 .box .ttl {
  font-size: 21px;
  line-height: 1.7;
  margin-bottom: 10px;
}

#sec2 .row2 .row-phone .col-phone2 .box .txt2 {
  font-size: 15px;
  line-height: 2.13;
  margin-bottom: 25px;
}

#sec2 .row2 .row-phone .col-phone2 .box .tbox {
  background: #fff;
  border-radius: 10px;
  min-height: 137px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  font-size: 21px;
  line-height: 1.76;
  padding: 15px 10px;
}

#sec2 .row2 .lgtxt {
  font-size: 27px;
  line-height: 1.48;
}

#sec2 .row2 .row-text1 {
  max-width: 1062px;
  width: 100%;
  margin: 52px auto 0;
  padding: 64px 0;
  border-top: 1px solid #c2c2c2;
  border-bottom: 1px solid #c2c2c2;
}

#sec2 .row2 .row-text1 h5 {
  margin-bottom: 14px;
}

#sec2 .row2 .row-text2 {
  padding: 64px 0 58px;
}

#sec2 .row2 .row-text2 h5 {
  margin-bottom: 9px;
}

#sec2 .row2 .box-ai {
  max-width: 1092px;
  width: 100%;
  margin: 0 auto 62px;
  border-radius: 20px;
  background-image: url("../img/about-aio/sec2_box_bg@2x.png");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: 50%;
  color: #fff;
  padding: 36px 30px 43px;
}

#sec2 .row2 .box-ai h5 {
  color: #fff;
  margin-bottom: 38px;
}

#sec2 .row2 .box-ai .rowlist {
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  column-gap: 69px;
  font-size: 25px;
  font-weight: 500;
  line-height: 40px;
  text-align: left;
}

#sec2 .row2 .box-ai .rowlist ul li {
  padding-left: 30px;
  position: relative;
}

#sec2 .row2 .box-ai .rowlist ul li:before {
  content: '';
  width: 26px;
  height: 26px;
  background-image: url("../img/about-aio/icon_check@2x.png");
  background-repeat: no-repeat;
  background-size: 100%;
  position: absolute;
  left: 0;
  top: 5px;
}

#sec2 .row2 .box-ai .rowlist ul li + li {
  margin-top: 20px;
}

#sec2 .row2 .box-ai .rowlist .txt4 {
  color: #129be0;
  padding-bottom: 27px;
}

#sec2 .row2 .lgtxt2 {
  font-size: 30px;
  line-height: 1.4;
}

@media screen and (max-width: 1180px) {
  #sec2 .row2:after {
    left: -30px;
    right: -30px;
  }
}

@media screen and (max-width: 1080px) {
  #sec2 .row2 .row-phone {
    justify-content: center;
  }
  #sec2 .row2 .row-phone .phone1 {
    width: 220px;
  }
  #sec2 .row2 .row-phone .col-phone2 .phone2 {
    width: 220px;
  }
  #sec2 .row2 .box-ai .rowlist {
    column-gap: 40px;
  }
}

@media screen and (max-width: 980px) {
  #sec2 .row1 h3 {
    font-size: 24px;
  }
  #sec2 .row1 .txt {
    font-size: 18px;
  }
  #sec2 .row2 .txt {
    font-size: 18px;
  }
  #sec2 .row2 .row-phone {
    display: block;
  }
  #sec2 .row2 .row-phone .phone1 {
    width: 253px;
    margin: 0 auto 30px;
  }
  #sec2 .row2 .row-phone .col-phone2 {
    margin: 0 auto;
  }
  #sec2 .row2 .row-phone .col-phone2 .phone2 {
    width: 253px;
  }
  #sec2 .row2 .box-ai {
    background-position: 70%;
  }
  #sec2 .row2 .box-ai h5 {
    margin-bottom: 25px;
  }
  #sec2 .row2 .box-ai .rowlist {
    font-size: 18px;
    line-height: 24px;
    column-gap: 25px;
  }
  #sec2 .row2 .box-ai .rowlist ul li:before {
    width: 22px;
    height: 22px;
    top: 1px;
  }
  #sec2 .row2 .lgtxt {
    font-size: 21px;
  }
  #sec2 .row2 .lgtxt2 {
    font-size: 25px;
  }
}

@media screen and (max-width: 767px) {
  #sec2 {
    padding-bottom: 4.7vw;
  }
  #sec2 .row1 {
    padding: 10.7vw 0 13.3vw;
  }
  #sec2 .row1 h2 {
    font-size: 5.5vw;
    line-height: 1.4;
    margin-bottom: 5vw;
  }
  #sec2 .row1 h3 {
    font-size: 4vw;
    line-height: 1.4;
    margin: 0 -3vw 3vw;
  }
  #sec2 .row1 .txt {
    font-size: 13px;
    line-height: 1.76;
    font-weight: 500;
    color: #4f4d4d;
  }
  #sec2 .row2 {
    padding: 6.7vw 4vw 0px;
    margin-bottom: 10vw;
  }
  #sec2 .row2:after {
    width: 84.3vw;
    background-image: url("../img/about-aio/sec2_bg_sp@2x.png");
    background-size: 100%;
    left: 0;
    right: auto;
  }
  #sec2 .row2 .fz30 {
    font-size: 4vw;
    line-height: 1.4;
  }
  #sec2 .row2 h4 {
    margin-bottom: 3vw;
  }
  #sec2 .row2 .txt {
    font-size: 13px;
    line-height: 1.76;
    font-weight: 500;
    color: #4f4d4d;
  }
  #sec2 .row2 .txt1 {
    margin-bottom: 8vw;
  }
  #sec2 .row2 .row-phone {
    max-width: none;
    margin: 0 auto 7vw;
    display: block;
  }
  #sec2 .row2 .row-phone .phone1 {
    width: 50vw;
    margin: 0 auto 11.5vw;
  }
  #sec2 .row2 .row-phone .col-phone2 {
    max-width: none;
    display: block;
  }
  #sec2 .row2 .row-phone .col-phone2 .phone2 {
    display: none;
  }
  #sec2 .row2 .row-phone .col-phone2 .box {
    max-width: none;
    width: 100%;
    border-radius: 3vw;
    padding: 5vw 0 4.7vw;
    color: #4f4d4d;
  }
  #sec2 .row2 .row-phone .col-phone2 .box .ttl {
    font-size: 4vw;
    line-height: 1.4;
    margin-bottom: 1vw;
  }
  #sec2 .row2 .row-phone .col-phone2 .box .txt2 {
    font-size: 13px;
    line-height: 1.76;
    font-weight: 500;
    margin-bottom: 2vw;
  }
  #sec2 .row2 .row-phone .col-phone2 .box .tbox {
    border-radius: 3vw;
    max-width: 225px;
    width: 94%;
    margin: 0 auto;
    min-height: 49px;
    font-size: 13px;
    line-height: 1.2;
    padding: 10px;
  }
  #sec2 .row2 .lgtxt {
    font-size: 4vw;
    line-height: 1.4;
    color: #595757;
  }
  #sec2 .row2 .row-text1 {
    max-width: none;
    margin: 8vw auto 0;
    padding: 8vw 0;
  }
  #sec2 .row2 .row-text1 h5 {
    margin-bottom: 3vw;
  }
  #sec2 .row2 .row-text1 .txt {
    font-weight: 500;
  }
  #sec2 .row2 .row-text2 {
    padding: 8vw 0 10vw;
  }
  #sec2 .row2 .row-text2 h5 {
    margin-bottom: 3vw;
  }
  #sec2 .row2 .box-ai {
    max-width: none;
    width: auto;
    margin: 0 -2vw 10vw;
    border-radius: 2vw;
    background-image: url("../img/about-aio/sec2_box_bg_sp@2x.jpg");
    padding: 5vw 4vw 6vw;
  }
  #sec2 .row2 .box-ai h5 {
    margin-bottom: 5vw;
    text-align: left;
  }
  #sec2 .row2 .box-ai .rowlist {
    max-width: none;
    display: block;
    font-size: 13px;
    line-height: 20px;
  }
  #sec2 .row2 .box-ai .rowlist ul {
    margin-bottom: 20px;
  }
  #sec2 .row2 .box-ai .rowlist ul li {
    padding-left: 20px;
  }
  #sec2 .row2 .box-ai .rowlist ul li:before {
    width: 17px;
    height: 17px;
    top: 0px;
  }
  #sec2 .row2 .box-ai .rowlist ul li + li {
    margin-top: 10px;
  }
  #sec2 .row2 .box-ai .rowlist .txt4 {
    line-height: 20px;
    padding-bottom: 0;
  }
  #sec2 .row2 .lgtxt2 {
    font-size: 4vw;
    line-height: 1.8;
    color: #595757;
  }
  #sec2 #banner-contact {
    padding: 0;
  }
}

#sec3 {
  background-image: url("../img/about-aio/sec3_bg@2x.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: 50%;
  color: #fff;
  padding: 116px 0;
}

#sec3 h2 {
  font-size: 33px;
  line-height: 1.96;
  font-weight: 700;
  margin-bottom: 26px;
}

#sec3 .txt {
  max-width: 585px;
  font-size: 20px;
  line-height: 2.2;
}

@media screen and (max-width: 980px) {
  #sec3 {
    background: url("../img/about-aio/sec3_bg_sp@2x.jpg") no-repeat 50% bottom, #000;
    background-size: 100%;
    padding: 80px 0 88vw;
  }
}

@media screen and (max-width: 767px) {
  #sec3 {
    padding: 15vw 0 84vw;
  }
  #sec3 h2 {
    font-size: 4vw;
    line-height: 1.6;
    margin-bottom: 6vw;
  }
  #sec3 .txt {
    max-width: none;
    font-size: 13px;
    line-height: 1.6;
  }
}