@media screen and (max-width: 1920px) {
  html, body {
    font-size: 20px;
  }
}

@media screen and (max-width: 1872px) {
  html, body {
    font-size: 19.5px;
  }
}

@media screen and (max-width: 1824px) {
  html, body {
    font-size: 19px;
  }
}

@media screen and (max-width: 1776px) {
  html, body {
    font-size: 18.5px;
  }
}

@media screen and (max-width: 1728px) {
  html, body {
    font-size: 18px;
  }
}

@media screen and (max-width: 1680px) {
  html, body {
    font-size: 17.5px;
  }
}

@media screen and (max-width: 1632px) {
  html, body {
    font-size: 17px;
  }
}

@media screen and (max-width: 1584px) {
  html, body {
    font-size: 16.5px;
  }
}

@media screen and (max-width: 1536px) {
  html, body {
    font-size: 16px;
  }
}

@media screen and (max-width: 1488px) {
  html, body {
    font-size: 15.5px;
  }
}

@media screen and (max-width: 1440px) {
  html, body {
    font-size: 15px;
  }
}

@media screen and (max-width: 1395px) {
  html, body {
    font-size: 14.5px;
  }
}

@media screen and (max-width: 1344px) {
  html, body {
    font-size: 14px;
  }
}

@media screen and (max-width: 1296px) {
  html, body {
    font-size: 13.5px;
  }
}

@media screen and (max-width: 1248px) {
  html, body {
    font-size: 13px;
  }
}

main .public_tit {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 2.4rem;
  margin: 0 auto;
}

main .public_tit .tit_bj_iner {
  width: 100%;
  font-size: 1em;
  font-family: Source Han Sans CN, Source Han Sans CN-Bold;
  font-weight: 700;
  text-align: center;
  color: #000000;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  margin-bottom: .68em;
  position: relative;
}

main .public_tit .tit_bj_iner span {
  color: #365BC9;
}

main .public_tit .fz_strip {
  width: 1.72em;
  height: .125em;
  background: #ffffff;
  background-image: url(../images/tit_xhx01.png);
  background-size: 100%;
  background-position: center;
  background-repeat: no-repeat;
  margin: auto;
  position: relative;
  overflow: hidden;
}

main .public_tit .tit_inner {
  width: 89.63%;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: .759em;
}

main .public_tit .tit_inner .tit_left {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

main .public_tit .tit_inner .tit_left div {
  width: 62.34%;
  opacity: 0.93;
  font-size: .416em;
  font-family: Source Han Sans SC, Source Han Sans SC-Normal;
  font-weight: normal;
  text-align: center;
  color: #000000;
  line-height: 1.5em;
  letter-spacing: 2px;
}

main .banners {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  background-image: url(../images/optical/banner_img01.png);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  font-size: 1.2rem;
}

main .banners p {
  width: 89.63%;
  font-size: 2.5em;
  font-family: Source Han Sans CN, Source Han Sans CN-Bold;
  font-weight: 700;
  text-align: left;
  color: #ffffff;
  margin: 14.35rem 0 13.55rem 0;
}

main .banners ul {
  width: 89.635%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

main .banners ul li.active {
  background: #4271ee;
}

main .banners ul li {
  width: 19.75%;
  background: rgba(0, 0, 0, 0.6);
}

main .banners ul li:hover {
  background: #4271ee;
}

main .banners ul li a {
  width: 100%;
  padding: 1.33em 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1em;
  font-family: Source Han Sans SC, Source Han Sans SC-Bold;
  font-weight: 700;
  text-align: left;
  color: #ffffff;
}

main .info {
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  background-image: url(../images/optical/background-img_01.png);
  background-size: 100%;
  background-position: center;
  background-repeat: no-repeat;
  padding-bottom: 7.13em;
}

main .info .info_box {
  width: 89.63%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 7.33em;
}

main .info .info_box .swiper {
  width: 46.77%;
  margin: 0;
}

main .info .info_box .swiper .swiper-wrapper .swiper-slide img {
  width: 100%;
  height: 100%;
  display: block;
}

main .info .info_box .swiper .page {
  position: absolute;
  top: auto;
  left: auto;
  right: 0;
  bottom: -2px;
  display: flex;
}

main .info .info_box .swiper .page .swiper-button-prev,
main .info .info_box .swiper .page .swiper-button-next {
  position: static;
  width: 2.63em;
  height: 2.63em;
  background-color: #979797;
  background-image: url(../images/right_img01-2.png);
  background-size: 27%;
  background-position: center;
  background-repeat: no-repeat;
  margin: 0;
}

main .info .info_box .swiper .page .swiper-button-prev::after,
main .info .info_box .swiper .page .swiper-button-next::after {
  content: "";
}

main .info .info_box .swiper .page .swiper-button-prev:hover,
main .info .info_box .swiper .page .swiper-button-next:hover {
  background-color: #38be86;
}

main .info .info_box .swiper .page .swiper-button-prev {
  transform: rotate(180deg);
}

main .info .info_inner {
  width: 45.14%;
  display: flex;
  flex-direction: column;
}

main .info .info_inner .tit {
  width: 100%;
}

main .info .info_inner .tit p {
  font-size: 4.09em;
  font-family: DINCondensedC, DINCondensedC-Regular;
  font-weight: 400;
  text-align: left;
  color: #000000;
  margin-bottom: .1em;
}

main .info .info_inner .tit span {
  font-size: 1.727em;
  font-family: Source Han Sans CN, Source Han Sans CN-Bold;
  font-weight: 700;
  text-align: left;
  color: #000000;
  display: inline-block;
  margin-bottom: 1.95em;
}

main .info .info_inner .tit .gdt {
  width: 100%;
  height: .09em;
  background-color: rgba(0, 0, 0, 0.22);
  position: relative;
  margin-bottom: 1.84em;
}

main .info .info_inner .tit .gdt::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  width: 16.76%;
  height: .27em;
  background-color: #38be86;
}

main .info .info_inner ul {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
}

main .info .info_inner ul li {
  width: 32%;
  font-size: 1em;
  font-family: Source Han Sans SC, Source Han Sans SC-Normal;
  font-weight: normal;
  text-align: left;
  color: #6f7587;
  line-height: 1.36em;
  margin-bottom: 1.36em;
}

main .info .info_inner ul li:last-child {
  width: 100%;
}

main .info .info_inner .info_tool {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

main .info .info_inner .info_tool .info_btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 10.68em;
  height: 3.27em;
  background: linear-gradient(135deg, #6188ee, #4271ee);
  box-shadow: 0px 3px 10px 0px rgba(56, 93, 190, 0.4);
}

main .info .info_inner .info_tool .info_btn span {
  width: 1.3em;
  height: 1.3em;
  margin-right: .77em;
  background-image: url(../images/kefu_img01.png);
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
}

main .info .info_inner .info_tool .info_btn p {
  font-size: 1.18em;
  font-family: Source Han Sans CN, Source Han Sans CN-Normal;
  font-weight: normal;
  text-align: left;
  color: #ffffff;
  line-height: 1.45em;
}

main .info .info_inner .info_tool .info_phone {
  display: flex;
  align-items: center;
}

main .info .info_inner .info_tool .info_phone div {
  width: 2.77em;
  height: 2.77em;
  background-image: url(../images/phone_img03.png);
  background-size: 100%;
  background-position: center;
  background-repeat: no-repeat;
  margin-right: 1.09em;
}

main .info .info_inner .info_tool .info_phone span {
  font-size: 1.18em;
  font-family: Source Han Sans SC, Source Han Sans SC-Regular;
  font-weight: 400;
  text-align: center;
  color: #6f7587;
  line-height: .9em;
  margin-right: 1.18em;
}

main .info .info_inner .info_tool .info_phone p {
  opacity: 0.9;
  font-size: 1.72em;
  font-family: Source Han Sans CN, Source Han Sans CN-Bold;
  font-weight: 700;
  text-align: center;
  color: #6f7587;
  line-height: .9em;
}

main .product {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  background-color: #f6f8fb;
  background-image: url(../images/optical/background-img_02.png);
  background-size: cover;
  background-position: top;
  background-repeat: no-repeat;
  font-size: 1rem;
  padding-bottom: 5.97em;
}

main .product .tit {
  width: 89.63%;
  display: flex;
  flex-direction: column;
  margin-top: 4.88em;
}

main .product .tit p {
  font-size: 1.9em;
  font-family: Source Han Sans CN, Source Han Sans CN-Bold;
  font-weight: 700;
  text-align: left;
  color: #ffffff;
  margin-bottom: 2.14rem;
}

main .product .tit .gdt {
  width: 100%;
  height: .1em;
  background-color: rgba(255, 255, 255, 0.6);
  position: relative;
  margin-bottom: 6.25em;
}

main .product .tit .gdt::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  width: 16.76%;
  height: .3em;
  background-color: #38be86;
}

main .product .prd_list {
  display: flex;
  flex-direction: column;
  width: 89.63%;
  position: relative;
  margin-bottom: 2.51em;
}

main .product .prd_list .prd_imgs {
  position: absolute;
  width: 28.82em;
  right: 1.7em;
  top: 0;
  bottom: 0;
  margin: auto;
}

main .product .prd_list .prd_imgs img {
  width: 100%;
  display: block;
}

main .product .prd_list li {
  width: 50.20%;
  margin-bottom: 3.41em;
}

main .product .prd_list li .tits {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.58em;
  margin-bottom: 2.09em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
  font-size: 1.4em;
  font-family: Source Han Sans SC, Source Han Sans SC-Bold;
  font-weight: 700;
  text-align: left;
  color: #ffffff;
}

main .product .prd_list li p {
  font-size: 1em;
  font-family: Source Han Sans SC, Source Han Sans SC-Normal;
  font-weight: normal;
  text-align: left;
  color: #ffffff;
  line-height: 1.5em;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}

main .product_ins {
  width: 100%;
  font-size: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  background-color: #f6f8fb;
}

main .product_ins .product_core {
  width: 89.63%;
  background: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 6.2em;
  padding-bottom: 8.5em;
  margin-bottom: 5.85em;
  margin-top: -5.2em;
}

main .product_ins .product_core .tits {
  width: 88.78%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.4em;
  font-family: Source Han Sans SC, Source Han Sans SC-Bold;
  font-weight: 700;
  text-align: left;
  color: #000000;
  padding-bottom: 1.57em;
  border-bottom: 1px solid #6f7587;
}

main .product_ins .product_core ul {
  width: 88.78%;
  display: flex;
  align-items: flex-start;
  justify-content: space-around;
  margin-top: 4.86em;
  margin-bottom: 9.75em;
}

main .product_ins .product_core ul li {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 1em;
  font-family: Source Han Sans SC, Source Han Sans SC-Regular;
  font-weight: 400;
  text-align: left;
  color: #29334c;
  line-height: 1.55em;
}

main .product_ins .product_core ul li:nth-child(1) div {
  background-image: url(../images/optical/tb_img01.png);
}

main .product_ins .product_core ul li:nth-child(2) div {
  background-image: url(../images/optical/tb_img02.png);
}

main .product_ins .product_core ul li:nth-child(3) div {
  background-image: url(../images/optical/tb_img03.png);
}

main .product_ins .product_core ul li:nth-child(4) div {
  background-image: url(../images/optical/tb_img04.png);
}

main .product_ins .product_core ul li div {
  width: 6.16em;
  height: 7.12em;
  margin-bottom: 1.167em;
  background-size: 100%;
  background-position: center;
  background-repeat: no-repeat;
}

main .product_ins .product_core ul li span {
  font-family: Source Han Sans CN, Source Han Sans CN-Bold;
  font-weight: 700;
  display: flex;
}

main .product_ins .product_core .imgs {
  width: 88.78%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-top: 3.57em;
}

main .product_ins .product_core .imgs div {
  width: 49.73%;
}

main .product_ins .product_core .imgs div img {
  display: block;
  width: 100%;
}

main .precision {
  width: 100%;
  font-size: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 6.07em;
}

main .precision .precision_list {
  width: 89.63%;
  display: flex;
  align-items: center;
  margin-bottom: 5.79em;
  margin-top: 5.025em;
}

main .precision .precision_list:nth-child(odd) {
  flex-direction: row-reverse;
  margin-top: 0;
}

main .precision .precision_list:nth-child(2) {
  box-shadow: 0px 10px 20px 0px rgba(0, 0, 0, 0.04);
}

main .precision .precision_list:hover .imgs img {
  transform: scale(1.06);
}

main .precision .precision_list .imgs {
  width: 49.91%;
  height: 24.2em;
  overflow: hidden;
}

main .precision .precision_list .imgs img {
  width: 100%;
  height: 100%;
  transition-duration: 1s;
}

main .precision .precision_list .precision_inner {
  width: 49.91%;
  height: 100%;
}

main .precision .precision_list .precision_inner p {
  font-size: 2.4em;
  font-family: Source Han Sans CN, Source Han Sans CN-Bold;
  font-weight: 700;
  text-align: left;
  color: #38BE86;
  margin-left: 6.98%;
  display: inline-block;
  margin-bottom: 1.87rem;
}

main .precision .precision_list .precision_inner .gdt {
  width: 79.16%;
  height: .15em;
  background-color: rgba(0, 0, 0, 0.22);
  margin-left: 6.98%;
  position: relative;
  margin-bottom: 1.92em;
}

main .precision .precision_list .precision_inner .gdt::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  width: 16.76%;
  height: .3em;
  background-color: #385dbe;
}

main .precision .precision_list .precision_inner span {
  width: 79.16%;
  display: inline-block;
  margin-left: 6.98%;
  opacity: 0.78;
  font-size: 1em;
  font-family: Source Han Sans SC, Source Han Sans SC-Normal;
  font-weight: normal;
  text-align: left;
  color: #000000;
  line-height: 1.5em;
  margin-bottom: 1.9em;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 7;
  -webkit-box-orient: vertical;
}

main .precision .precision_list .precision_inner a {
  margin-left: 6.98%;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 21.14%;
  height: 2.65em;
  background: linear-gradient(135deg, #6e95f9, #365bc9);
  box-shadow: 0px 3px 10px 0px rgba(56, 93, 190, 0.4);
  font-size: 1em;
  font-family: Source Han Sans SC, Source Han Sans SC-Normal;
  font-weight: normal;
  text-align: left;
  color: #ffffff;
  line-height: 1.4em;
}

main .precision .precision_list .precision_inner a div {
  width: 1.3em;
  height: 1.3em;
  position: relative;
  margin-left: 16.48%;
  background-image: url(../images/index/move_img01.png);
  background-size: 100%;
  background-position: center;
  background-repeat: no-repeat;
}

main .strength {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: #4271ee;
  font-size: 1.3rem;
  padding-top: 4.16em;
  padding-bottom: 5.73em;
}

main .strength .public_tit {
  margin: 0 auto;
}

main .strength .public_tit .tit_bj_iner {
  color: #ffffff;
}

main .strength .public_tit .tit_bj_iner span {
  color: #ffffff;
}

main .strength .public_tit .fz_strip {
  background: #4271ee;
  background-image: url(../images/tit_xhx02.png);
  background-size: 100%;
  background-position: center;
  background-repeat: no-repeat;
}

main .strength .public_tit .tit_inner .tit_left div {
  color: #ffffff;
}

main .strength .strength_box {
  width: 89.63%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 3.89em;
}

main .strength .strength_box ul {
  width: 100%;
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
}

main .strength .strength_box ul::after {
  content: "";
  position: absolute;
  width: 19.26em;
  height: 21.91em;
  top: 0;
  left: 0;
  right: 0;
  margin: auto;
  background-image: url(../images/optical/background-img_03.png);
  background-size: 100%;
  background-position: center;
  background-repeat: no-repeat;
}

main .strength .strength_box ul li {
  width: 34%;
  display: flex;
  align-items: center;
  position: relative;
  margin-bottom: 7.3em;
}

main .strength .strength_box ul li::after {
  content: "";
  position: absolute;
  right: 3.5em;
  bottom: -.57em;
  width: 17.3em;
  height: 1.3em;
  background-image: url(../images/optical/bottom_img02.png);
  background-size: 100%;
  background-position: center;
  background-repeat: no-repeat;
}

main .strength .strength_box ul li:nth-child(odd) {
  flex-direction: row-reverse;
}

main .strength .strength_box ul li:nth-child(even)::after {
  right: auto;
  left: 3.5em;
  bottom: -.57em;
  width: 17.3em;
  height: 1.3em;
  background-image: url(../images/optical/bottom_img01.png);
  background-size: 100%;
  background-position: center;
  background-repeat: no-repeat;
}

main .strength .strength_box ul li:nth-child(even) div {
  margin-left: 0;
  margin-right: 1.26em;
}

main .strength .strength_box ul li:nth-child(1) div {
  background-image: url(../images/optical/tb_img05.png);
}

main .strength .strength_box ul li:nth-child(2) div {
  background-image: url(../images/optical/tb_img06.png);
}

main .strength .strength_box ul li:nth-child(3) div {
  background-image: url(../images/optical/tb_img07.png);
}

main .strength .strength_box ul li:nth-child(4) div {
  background-image: url(../images/optical/tb_img08.png);
}

main .strength .strength_box ul li:nth-child(5) {
  margin: 0 auto;
  flex-direction: column;
  align-items: center;
  margin-top: -3em;
}

main .strength .strength_box ul li:nth-child(5)::after {
  right: 0;
  left: 0;
  top: 5.57em;
  bottom: auto;
  margin: auto;
  width: 3.3em;
  height: 1.23em;
  background-image: url(../images/optical/bottom_img03.png);
}

main .strength .strength_box ul li:nth-child(5) div {
  margin: 0;
  margin-bottom: 2.08em;
  background-image: url(../images/optical/tb_img09.png);
}

main .strength .strength_box ul li:nth-child(5) span {
  text-align: center;
}

main .strength .strength_box ul li div {
  width: 5.28em;
  height: 5.95em;
  background-size: 100%;
  background-position: center;
  background-repeat: no-repeat;
  margin-left: .5em;
}

main .strength .strength_box ul li span {
  width: 65.53%;
  font-size: 1em;
  font-family: Source Han Sans CN, Source Han Sans CN-Normal;
  font-weight: normal;
  text-align: left;
  color: #ffffff;
  line-height: 2em;
  display: inline-block;
}

main .recommend {
  width: 100%;
  font-size: 1.45rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-wrap: wrap;
  padding-bottom: 3.48em;
  padding-top: 3.77em;
}

main .recommend ul {
  width: 89.63%;
  display: flex;
  align-items: flex-start;
  margin-top: 3.49em;
}

main .recommend ul li {
  width: 31.82%;
  margin-right: 2.25%;
}

main .recommend ul li:nth-child(3n+3) {
  margin-right: 0;
}

main .recommend ul li:hover a div img {
  transform: scale(1.06);
}

main .recommend ul li a {
  width: 100%;
  display: flex;
  flex-direction: column;
}

main .recommend ul li a div {
  width: 100%;
  height: 10.86em;
  overflow: hidden;
}

main .recommend ul li a div img {
  width: 100%;
  height: 100%;
  display: inline-block;
  transition-duration: 1s;
}

main .recommend ul li a span {
  width: 100%;
  height: 1.17em;
  font-size: 1em;
  font-family: Source Han Sans CN, Source Han Sans CN-Bold;
  font-weight: 700;
  text-align: center;
  color: #000000;
  padding: 1.04em 0;
  display: inline-block;
  background-color: #f6f8fb;
}