.periodic {
  width: 100%;
  height: auto;
  padding: 67px 0 120px;
}

.periodic .periodic_content {
  width: 100%;
  height: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.periodic .periodic_content .chuangcuhei {
  color: #111;
  text-align: center;
  font-size: 42px;
  font-style: normal;
  font-weight: 400;
  line-height: 50px;
  /* 119.048% */
}

.periodic .periodic_content .chuangcuhei span {
  font-size: 33px;
  font-weight: 500;
}

.periodic .periodic_content .page_c_tab_box {
  margin-top: 14px;
  width: 660px;
  height: 60px;
  border-radius: 4px;
  border: 1px solid #A4A4A4;
  border-right: none;
  display: flex;
  flex-direction: row;
  align-items: center;
}

.periodic .periodic_content .page_c_tab_box .tab_item {
  border-right: 1px solid #A4A4A4;
  width: 50%;
  height: 100%;
  border-radius: 4px;
  cursor: pointer;
  color: #666;
  text-align: center;
  font-size: 26px;
  font-style: normal;
  font-weight: 400;
  line-height: 32px;
  /* 123.077% */
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}

.periodic .periodic_content .page_c_tab_box .tab_item.active {
  color: #fff;
  background: #E60012;
  border-color: #E60012;
}

.periodic .periodic_content .periodic_box {
  width: 100%;
  height: auto;
  margin-top: 60px;
}

.periodic .periodic_content .periodic_box .periodic_box_item {
  width: 100%;
  height: auto;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 30px;
}

.periodic .periodic_content .periodic_box .periodic_box_item .periodic_item {
  width: calc((100% - 30px) / 2);
  height: 240px;
  background: #F9F9F9;
  padding: 0 64px 0 52px;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

.periodic .periodic_content .periodic_box .periodic_box_item .periodic_item:hover {
  background: #FFF;
  box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.1);
}

.periodic .periodic_content .periodic_box .periodic_box_item .periodic_item:hover .item_more {
  border-color: #E60012;
  color: #fff;
  background: #E60012;
}

.periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 30px;
}

.periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_left img {
  width: 56px;
  height: 56px;
}

.periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_left span {
  color: #111;
  font-size: 26px;
  font-style: normal;
  font-weight: 400;
  line-height: 40px;
  /* 153.846% */
}

.periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_more {
  display: inline-block;
  min-width: 140px;
  text-align: center;
  border-radius: 4px;
  border: 1px solid #A4A4A4;
  padding: 0 10px;
  height: 48px;
  color: #666;
  font-size: 16px;
  font-style: normal;
  font-weight: 400;
  line-height: 48px;
  /* 250% */
}

@media screen and (max-width: 1440px) {
  .periodic {
    width: 100%;
    height: auto;
    padding: 3.95486vw 0 7.08333vw;
  }
  .periodic .periodic_content {
    width: 100%;
    height: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .periodic .periodic_content .chuangcuhei {
    color: #111;
    text-align: center;
    font-size: 2.47917vw;
    font-style: normal;
    font-weight: 400;
    line-height: 2.95139vw;
    /* 119.048% */
  }
  .periodic .periodic_content .chuangcuhei span {
    font-size: 1.94792vw;
    font-weight: 500;
  }
  .periodic .periodic_content .page_c_tab_box {
    margin-top: 0.82639vw;
    width: 38.95833vw;
    height: 3.54167vw;
    border-radius: 0.23611vw;
    border: 0.05903vw solid #A4A4A4;
    border-right: none;
    display: flex;
    flex-direction: row;
    align-items: center;
  }
  .periodic .periodic_content .page_c_tab_box .tab_item {
    border-right: 0.05903vw solid #A4A4A4;
    width: 50%;
    height: 100%;
    border-radius: 0.23611vw;
    cursor: pointer;
    color: #666;
    text-align: center;
    font-size: 1.53472vw;
    font-style: normal;
    font-weight: 400;
    line-height: 1.88889vw;
    /* 123.077% */
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
  }
  .periodic .periodic_content .page_c_tab_box .tab_item.active {
    color: #fff;
    background: #E60012;
    border-color: #E60012;
  }
  .periodic .periodic_content .periodic_box {
    width: 100%;
    height: auto;
    margin-top: 3.54167vw;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item {
    width: 100%;
    height: auto;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1.77083vw;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item {
    width: calc((100% - 1.77083vw) / 2);
    height: 14.16667vw;
    background: #F9F9F9;
    padding: 0 3.77778vw 0 3.06944vw;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item:hover {
    background: #FFF;
    box-shadow: 0 0 1.18056vw 0 rgba(0, 0, 0, 0.1);
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item:hover .item_more {
    border-color: #E60012;
    color: #fff;
    background: #E60012;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_left {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.77083vw;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_left img {
    width: 3.30556vw;
    height: 3.30556vw;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_left span {
    color: #111;
    font-size: 1.53472vw;
    font-style: normal;
    font-weight: 400;
    line-height: 2.36111vw;
    /* 153.846% */
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_more {
    display: inline-block;
    min-width: 8.26389vw;
    text-align: center;
    border-radius: 0.23611vw;
    border: 0.05903vw solid #A4A4A4;
    padding: 0 0.59028vw;
    height: 2.83333vw;
    color: #666;
    font-size: 0.94444vw;
    font-style: normal;
    font-weight: 400;
    line-height: 2.83333vw;
    /* 250% */
  }
}

@media screen and (max-width: 1024px) {
  .periodic {
    width: 100%;
    height: auto;
    padding: 10.66667vw 0 10.66667vw;
  }
  .periodic .periodic_content {
    width: 100%;
    height: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .periodic .periodic_content .column-title {
    margin-bottom: 5.66667vw;
  }
  .periodic .periodic_content .column-title::after {
    margin-top: 0;
  }
  .periodic .periodic_content .chuangcuhei {
    font-size: 7.46667vw;
    line-height: 1.2;
    margin-top: 0;
    margin-bottom: 0;
    padding-bottom: 2.66667vw;
    height: 9.6vw;
  }
  .periodic .periodic_content .chuangcuhei span {
    font-size: 6vw;
    font-weight: 500;
  }
  .periodic .periodic_content .page_c_tab_box {
    margin-top: 1.86667vw;
    width: 92vw;
    height: 10.66667vw;
    border-radius: 1.06667vw;
    border: 0.26667vw solid #A4A4A4;
    border-right: none;
    display: flex;
    flex-direction: row;
    align-items: center;
  }
  .periodic .periodic_content .page_c_tab_box .tab_item {
    border-right: 0.26667vw solid #A4A4A4;
    width: auto;
    flex: 1;
    height: 100%;
    border-radius: 1.06667vw;
    cursor: pointer;
    color: #666;
    text-align: center;
    font-size: 4.26667vw;
    font-style: normal;
    font-weight: 400;
    line-height: 4.26667vw;
    /* 123.077% */
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
  }
  .periodic .periodic_content .page_c_tab_box .tab_item.active {
    color: #fff;
    background: #E60012;
    border-color: #E60012;
  }
  .periodic .periodic_content .periodic_box {
    width: 100%;
    height: auto;
    margin-top: 8.53333vw;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item {
    width: 100%;
    height: auto;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4vw;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item {
    width: 100%;
    height: auto;
    background: #F9F9F9;
    padding: 5.33333vw;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: inherit;
    gap: 5.33333vw;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item:hover {
    background: #FFF;
    box-shadow: 0 0 2.66667vw 0 rgba(0, 0, 0, 0.1);
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item:hover .item_more {
    border-color: #E60012;
    color: #fff;
    background: #E60012;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_left {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.66667vw;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_left img {
    width: 14.93333vw;
    height: 14.93333vw;
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_left span {
    color: #111;
    font-size: 4.26667vw;
    font-style: normal;
    font-weight: 400;
    line-height: 5.33333vw;
    /* 153.846% */
  }
  .periodic .periodic_content .periodic_box .periodic_box_item .periodic_item .item_more {
    display: inline-block;
    min-width: 37.33333vw;
    text-align: center;
    border-radius: 1.06667vw;
    border: 0.26667vw solid #A4A4A4;
    padding: 0 2.66667vw;
    height: 42px;
    color: #666;
    font-size: 3.2vw;
    font-style: normal;
    font-weight: 400;
    line-height: 42px;
    /* 250% */
  }
}