.concept-list {
  --h: 60vh;

  display: flex;
}

.concept-list > li {
  transition: 0.5s;
  box-sizing: border-box;
  width: 21%;
}

@media only screen and (min-width: 768px) {
  .concept-list > li.on {
    width: 58%;
  }
}

/* item */

.concept-list > li:first-child .concept-list-item .pic,
.concept-list > li:first-child .concept-list-item .pic img,
.concept-list > li:first-child .concept-list-item .meta,
.concept-list > li:first-child .concept-list-item .overlay {
  border-radius: 0.5rem 0 0 0.5rem;
}

.concept-list > li:last-child .concept-list-item .pic,
.concept-list > li:last-child .concept-list-item .pic img,
.concept-list > li:last-child .concept-list-item .meta,
.concept-list > li:last-child .concept-list-item .overlay {
  border-radius: 0 0.5rem 0.5rem 0;
}

.concept-list-item {
  height: var(--h);
}

.concept-list-item a {
  display: block;
  position: relative;
  height: 100%;
}

.concept-list-item .pic {
  height: 100%;
  overflow: hidden;
}

.concept-list-item .pic img {
  transition: 0.5s;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.concept-list-item:hover img {
  transform: scale(1.1);
}

.concept-list-item .overlay,
.concept-list-item .meta {
  overflow: hidden;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
}

.concept-list-item .meta {
  padding: 0.72rem;
  background: rgba(0, 10, 24, 0.6);
  transition: all 0.3s;
}

.concept-list-item .overlay {
  background: linear-gradient(
    225deg,
    rgba(26, 34, 50, 0) 35.167%,
    rgba(26, 34, 50, 0.6) 83.326%
  );
  opacity: 0;
  padding: 0.72rem 1rem;
  transition: all 0.5s;
}

.concept-list-item .title {
  color: rgba(255, 255, 255, 1);
  font-size: var(--font24);
  line-height: 1.5;
}

.concept-list-item .subtitle {
  color: var(--main-color);
  font-size: var(--font18);
  margin-bottom: 0.8rem;
}

.concept-list-item .desc {
  transition: all 0.3s;
  color: rgba(255, 255, 255, 1);
  font-size: var(--font18);
  font-weight: 300;
}

/* active */

.concept-list > li.on .concept-list-item .meta {
  opacity: 0;
}

.concept-list > li.on .concept-list-item .overlay {
  opacity: 1;
}

@media screen and (max-width: 767px) {
  .concept-list {
    flex-wrap: wrap;
  }

  .concept-list > li {
    width: 100% !important;
    margin-bottom: 24px;
  }
}

/* para */

.ab5 {
  padding: 0 0 2.8rem 0;
  padding-top: 1.3rem;
  height: 500vh;
  position: relative;
  box-sizing: border-box;
}

.ab5 > div.conx {
  position: sticky;
  top: 1.2rem;
  box-sizing: border-box;
}

.ab5 .tit {
  text-align: center;
  line-height: 1.33;
  margin-bottom: 0.76rem;
  color: #000000;
  font-weight: 600;
  box-sizing: border-box;
}

.ab5 .cons {
  padding-left: 2.07rem;
  overflow: hidden;
  box-sizing: border-box;
}

.ab5 .cons .con {
  width: fit-content;
  display: flex;
  position: relative;
  box-sizing: border-box;
}

.ab5 .cons .con .box {
  width: 10.65rem;
  margin-right: 2.4rem;
  box-sizing: border-box;
}

.ab5 .cons .con .box:last-child {
  margin-right: 0;
  box-sizing: border-box;
}

.ab5 .cons .con .box .txt {
  display: flex;
  align-items: flex-start;
  box-sizing: border-box;
}

.ab5 .cons .con .box .txt .icon {
  width: 0.5rem;
  height: 0.5rem;
  object-fit: contain;
  margin-right: 0.5rem;
  box-sizing: border-box;
}

.ab5 .cons .con .box .txt .txt1 {
  width: calc(100% - 1rem);
  box-sizing: border-box;
}

.ab5 .cons .con .box .txt .txt1 .h {
  color: #333333;
  line-height: 0.32rem;
  margin-bottom: 0.3rem;
  box-sizing: border-box;
}

.ab5 .cons .con .box .txt .txt1 .p {
  color: #333333;
  line-height: 0.26rem;
  height: 1.3rem;
  margin-bottom: 0.58rem;
  box-sizing: border-box;
}

.ab5 .cons .con .box .pic {
  width: 100%;
  height: 5.2rem;
  border-radius: 0.3rem;
  overflow: hidden;
  box-sizing: border-box;
}

.ab5 .cons .con .box .pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  box-sizing: border-box;
}

.r2 .mod .mod-hd {
  margin-bottom: 0.72rem;
}

.r2 .mod-bd {
  padding-left: var(--safe-area-inset, 20px);
}

.service-container {
  position: sticky;
  top: 2rem;
}

.service-list {
  width: fit-content;
  display: flex;
  position: relative;
}

.service-list > li {
  box-sizing: border-box;
  width: 12.6rem;
  margin-right: 0.4rem;
}

.service-list-item {
  box-sizing: border-box;
  border: 1px solid rgba(218, 222, 230, 1);
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 1);
  padding: 0.8rem;
}

.service-list-item .pic,
.service-list-item .pic img {
  border-radius: 0.3rem;
}

.service-list-item .pic {
  max-width: 9.6rem;
  margin-top: 0.54rem;
}

.service-list-item .meta {
  padding-left: 1.3rem;
  position: relative;
}

.service-list-item .icon {
  position: absolute;
  left: 0;
  top: 0;
  width: 0.9rem;
  height: 0.9rem;
}

.service-list-item .icon img {
  width: 100%;
  height: 100%;
}

.service-list-item .title {
  color: rgba(0, 0, 0, 1);
  font-size: var(--font24);
  margin-bottom: 0.12rem;
}

.service-list-item .desc {
  color: rgba(136, 136, 136, 1);
  font-size: var(--font18);
}

.project-list {
  --item-size: 2.26rem;
  --circle-width: 2.44rem;
}

.project-list {
  display: flex;
  justify-content: space-between;
  gap: 0.2rem;
}

@media only screen and (max-width: 767px) {
  .project-list {
    flex-wrap: wrap;
  }

  .project-list li {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

.project-list-item {
  position: relative;
  width: var(--item-size);
  height: var(--item-size);
}

.project-list-item .bg {
  position: absolute;
  width: var(--circle-width);
  height: 100%;
  left: 0;
  top: 0;
}

.project-list > li:last-child .project-list-item .bg {
  height: 100%;
  width: 100%;
}

.project-list-item .bg img {
  height: 100%;
  width: 100%;
}

.project-list-item .meta {
  transition: all 0.3s;
  box-sizing: border-box;
  position: relative;
  height: 100%;
  width: 100%;
  padding: 0.24rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 2;
}

.project-list-item .title {
  color: rgba(0, 0, 0, 1);
  font-size: var(--font18);
  text-align: center;
}

.project-list-item .num {
  font-size: var(--font40);
  color: var(--main-color);
  font-weight: 700;
}

@media only screen and (max-width: 767px) {
  .concept-list {
    --h: 280px;
  }

  .concept-list > li .concept-list-item .pic,
  .concept-list > li .concept-list-item .pic img,
  .concept-list > li .concept-list-item .meta,
  .concept-list > li .concept-list-item .overlay {
    border-radius: 8px !important;
  }

  .concept-list-item .overlay {
    padding: 28px 20px;
  }

  .concept-list-item .subtitle {
    margin-bottom: 20px;
  }

  .concept-list > li .concept-list-item .overlay {
    background: rgba(0, 10, 24, 0.6);
    opacity: 1;
  }

  .concept-list-item .meta {
    opacity: 0;
  }

  .project-list {
    --item-size: 160px;
    --circle-width: 172px;
  }
}

@media only screen and (max-width: 1024px) {
  .r2 .mod-bd {
    padding: 0 var(--safe-area-inset, 20px);
  }

  .service-container {
    position: static;
    top: auto;
  }

  .service-list {
    flex-wrap: wrap;
    width: 100%;
  }

  .service-list > li {
    width: 100%;
    margin: 0 0 24px;
  }

  .service-list-item {
    padding: 12px;
  }

  .service-list-item .pic {
    max-width: 100%;
    margin-top: 16px;
  }

  .r3 .mod .mod-hd h3 {
    text-align: center;
  }
}