<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">/* é€šç”¨ */
p {
  margin: 0;
}

body {
  font-size: 14px;
  line-height: 1.42;
  font-family: "robotoregular", Arial, Candara, "SF Pro Display";
}

.dth_wh {
  width: 100%;
  max-width: 1640px;
  display: block;
  margin: 0 auto;
  padding: 0 60px;
}

.flex {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: nowrap;
}

.flex::before,
.flex::after {
  display: none;
}

.fixed_ratio {
  position: relative;
  overflow: hidden;
  padding-top: calc(3 / 4 * 100%);
}

.fixed_ratio img {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.enlarge .imgs {
  overflow: hidden;
  position: relative;
}

.enlarge .imgs img {
  transform: scale(1);
  transition: 0.4s ease;
}

.enlarge:hover .imgs img {
  transform: scale(1.1);
}

@media (max-width: 1640px) {
  .dth_wh {
    padding: 0 3.75%;
  }
}
@media (max-width: 1200px) {
  .dth_wh {
    width: 100%;
    padding: 0 15px;
  }
}

@media (max-width: 991px) {
  body {
    padding-top: 0;
  }
}

@media (max-width: 767px) {
  body {
    padding-bottom: 0;
  }
}

@media (max-width: 640px) {
  .dth_wh {
    padding: 0 12px;
  }
}

/* æ’ä»¶æ•´ä½“æ&nbsp;·å¼ä¿®æ”¹ */
.slick-arrows {
  outline: none;
}

.swiper-button-prev,
.swiper-button-next {
  outline: none;
}

.swiper-button-prev,
.swiper-button-next {
  outline: none;
  display: flex;
  width: 24px;
  height: 44px;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.swiper-button-prev::after,
.swiper-button-next::after {
  content: "";
  background: none;
  display: block;
  width: 40px;
  height: 40px;
  border: 2px solid #ffffff;
  position: absolute;
  transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
  left: 12px;
  top: 50%;
  margin-top: -20px;
}

.swiper-button-prev::after,
.swiper-button-next::after {
  width: 16px;
  height: 16px;
  border-color: transparent transparent #4d4d4d #4d4d4d;
  position: relative;
  left: 0;
  top: 0;
  margin: 0;
}

.swiper-button-prev:hover::after,
.swiper-button-next:hover::after {
  border-color: transparent transparent #ffffff #ffffff;
}

.swiper-button-next {
  transform: rotate(180deg);
  -webkit-transform: rotate(180deg);
}

.swiper-pagination {
  position: absolute;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  bottom: 5%;
  left: 0;
}

.swiper-pagination .swiper-pagination-bullet {
  outline: none;
  margin: 0 1em;
}

@media (max-width: 992px) {

  .swiper-button-prev,
  .swiper-button-next {
    display: none;
  }
}

/* å¤´éƒ¨ */
header {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  width: 100%;
  z-index: 90;
  /* padding-bottom: 20px; */
  transition: 0.5s ease;

  padding: 20px 0;
}

header .dth_wh {
  position: relative;
  z-index: 10;
}
@media (min-width: 1641px) {
  header .dth_wh {
    padding: 0 3.75%;
    max-width: 100%;
  }
}

header.page_header {
  /* position: relative; */
}

header::after {
  content: "";
  display: block;
  width: 100%;
  height: 0;
  background-color: #ffffff;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  transition: 1s ease;
  z-index: -1;
}

header.black {
  /*background-color: #ffffff;*/
  box-shadow: 0 0 2px 0px rgba(0, 0, 0, 0.16);
}

header.black::after {
  height: 100%;
}

header.bxt {
  padding-top: 10px;
  padding-bottom: 10px;
}

.header_top {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  height: 50px;
  padding-top: 10px;
  transition: 0.5s ease;
  overflow: hidden;

  display: none;
}

.page_header .header_top {
  height: 40px;
}

header.bxt .header_top {
  height: 0;
  padding-top: 0;
}

.header_top .logn {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.header_top .logn a {
  display: block;
  font-size: 12px;
  line-height: 2;
  padding: 0 10px 0 30px;
  font-weight: 400;
  background-repeat: no-repeat;
  background-position: left 50%;
  color: #ffffff;
  transition: 0.5s ease;
}

.black .header_top .logn a {
  color: #999;
}

.header_top .logn a:first-child {
  background-image: url("../images/lo.png");
}

.black .header_top .logn a:first-child {
  background-image: url("../images/lo2.png");
}

.header_top .logn a:last-child {
  background-image: url("../images/re.png");
  margin-left: 20px;
  padding-right: 0;
}

.black .header_top .logn a:last-child {
  background-image: url("../images/re2.png");
}

.header_bottm {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  /* padding-top: 20px; */
}

.header_bottm .logo {
  padding-right: 15px;
}

.header_bottm .logo a {
  display: block;
}

/*.header_bottm .logo a:last-child {*/
/*  display: none;*/
/*}*/

.header_bottm .logo img {
  max-width: 100%;
  max-height: 65px;
  object-fit: contain;
}

/*.black .logo a {*/
/*  display: none;*/
/*}*/

/*.black .logo a:last-child {*/
/*  display: block;*/
/*}*/

/* æœç´¢ */
.search {
  padding: 5px 0;
  position: relative;
  margin: 0 2% 0 8%;
  z-index: 30;
}

.search_btn {
  display: block;
  background-image: url("../images/btn2.png");
  background-repeat: no-repeat;
  background-position: center;
  width: 30px;
  height: 30px;
  transition: 0.5s ease;
  cursor: pointer;
}

.black .search_btn {
  background-image: url("../images/btn3.png");
}

.search_form {
  position: absolute;
  right: 0;
  top: 100%;
  display: none;
  padding: 0;
  width: 540px;
  background-color: #ffffff;
  border-radius: 5px 5px 0 0;
}

.search #search_form {
  width: 100%;
  height: 40px;
  border-bottom: 1px solid #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: 1s ease;
  background: #f2f2f2;
  border-radius: 5px 5px 0 0;
  overflow: hidden;
}

.search #search_form input {
  outline: none;
  border: none;
  background: none;
  transition: 1s ease;
}

.search #search_form #search_keyword {
  width: calc(100% - 70px);
  height: 40px;
  outline: none;
  border-radius: 19px;
  color: rgba(51, 51, 51, 1);
  padding: 6px 24px;
  font-size: 12px;
}


.search #search_form #search_keyword::-webkit-input-placeholder {
  /* placeholderé¢œè‰²  */
  color: rgba(51, 51, 51, 0.7);
  transition: 1s ease;
}

.black .search #search_form #search_keyword::-webkit-input-placeholder {
  color: #bfbfbf;
}

.search #search_form #search_btn {
  border: none;
  height: 40px;
  width: 70px;
  font-size: 12px;
  transition: 1s ease;
  color: #e50012;
  background-image: url("../images/btn3.png");
  background-repeat: no-repeat;
  background-position: center;
}

.search_hot {
  padding: 20px 24px;
}

.search_hot .key_w {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  margin-top: 6px;
}

.search_hot a {
  display: block;
  background: #000;
  color: #fff;
  font-size: 12px;
  padding: 4px 12px;
  margin: 0;
  line-height: 2;
  margin-right: 0.5em;
}

.search_close {
  position: absolute;
  left: 100%;
  top: 0;
  background-color: rgba(0, 0, 0, 0.1);
  color: #fff;
  width: 40px;
  top: 0;
  text-align: center;
  height: 40px;
  line-height: 40px;
  font-size: 24px;
  cursor: pointer;
}


/* è¯­è¨€ */
.language {
  color: #fff;
  transition: 1s ease;
  position: relative;
  z-index: 20;
}

.black .language {
  color: #333;
}

.language a {
  color: #fff;
  padding: 0 3px;
  font-size: 16px;
  line-height: 60px;
  transition: 1s ease;
}

.black .language a {
  color: #333;
}

.language a.active {
  color: #e50012;
}


/* å¯¼èˆª */
nav {
  margin-left: auto;
}

.x-menu {
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

.x-menu&gt;li {
  position: relative;
}

.x-menu&gt;li&gt;a {
  font-size: 20px;
  display: inline-block;
  padding: 11px 48px;
  line-height: 2;
  color: #ffffff;
  font-family: "robotoregular";
  transition: 1s ease;
}

.black .x-menu&gt;li&gt;a {
  color: #333;
}

.x-menu&gt;li:hover&gt;a {
  color: #e50012;
}

.x-menu&gt;li.active&gt;a {}

.x-menu&gt;li:after {
  content: "";
  display: block;
  width: 100%;
  position: absolute;
  left: 50%;
  top: 100%;
  transform: translateX(-50%);
  height: 0;
}

.x-menu&gt;li:hover:after {
  height: 20px;
}

header.bxt .x-menu&gt;li:hover:after {
  height: 10px;
}

.x-sub-menu {
  display: none;
  position: absolute;
  width: 100%;
  left: 50%;
  top: calc(100% + 20px);
  background-color: rgb(0, 0, 0, .5);
  padding: 15px 0;
  transform: translateX(-50%);
}

header.bxt .x-sub-menu {
  top: calc(100% + 10px);
}
.x-sub-menu&gt;li {
  position: relative;
}
.x-sub-menu&gt;li&gt;a {
  display: block;
  color: #fff;
  line-height: 36px;
  font-size: 16px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  text-align: center;
  padding: 0 1em;
}

.x-sub-menu&gt;li:hover&gt;a {
  color: #e60013;
}

.three-menu {
  position: absolute;
  left: 100%;
  top: 0;
  width: 100%;
  display: none;
  background-color: rgb(0, 0, 0, 0.6);
  padding: 15px 0;
}
.three-menu&gt;li {
  position: relative;
}
.three-menu&gt;li&gt;a {
  display: block;
  font-size: 15px;
  line-height: 32px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  text-align: center;
  color: #ffffff;
  padding: 0 1em;
}
.three-menu&gt;li:hover&gt;a {
  color: #e60013;
}

.four-menu {
  position: absolute;
  left: 100%;
  top: 0;
  width: 100%;
  display: none;
  background-color: rgb(0, 0, 0, 0.6);
  padding: 12px 0;
}
.four-menu&gt;li {
  position: relative;
}
.four-menu&gt;li&gt;a {
  display: block;
  font-size: 14px;
  line-height: 30px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  text-align: center;
  color: #ffffff;
  padding: 0 1em;
}
.four-menu&gt;li:hover&gt;a {
  color: #e60013;
}

.menu_btn {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  display: none;
}

@media (max-width: 1500px) {
  .x-menu&gt;li&gt;a {
    padding: 12px 2vw;
    font-size: 18px;
  }

  .search {
    padding: 0 2%;
  }
}

@media (max-width: 1200px) {
  .x-sub-menu&gt;li&gt;a {
    font-size: 15px;
    line-height: 32px;
  }
  .three-menu&gt;li&gt;a {
    font-size: 14px;
    line-height: 28px;
  }
  .four-menu&gt;li&gt;a {
    font-size: 13px;
    line-height: 25px;
  }
  .search {
    display: none;
  }
}

@media (min-width: 991px) { 
  .x-menu&gt;li.nav_lang {
    display: none;
  }
}

@media (max-width: 990px) {
  .header_bottm .logo a {
    display: none;
  }

  .header_bottm .logo a:last-child {
    display: block;
  }

  .language {
    display: none;
  }
}

@media (max-width: 900px) {

  header,
  header.page_header {
    padding: 0;
    position: relative;
  }

  .header_top {
    display: none;
  }

  .header_bottm {
    flex-wrap: wrap;
  }

  .header_bottm .logo {
    width: 120px;
    padding: 10px 0;
  }

  .header_bottm .nav_btn {
    position: relative;
    display: inline-flex;
    flex-flow: column;
    border: 1px solid #e50012;
    padding: 9px 10px;
    margin-left: auto;
    border-radius: 2px;
  }

  .header_bottm .nav_btn::before,
  .header_bottm .nav_btn::after {
    content: "";
  }

  .header_bottm .nav_btn::before,
  .header_bottm .nav_btn::after,
  .header_bottm .nav_btn span {
    display: block;
    width: 22px;
    height: 2px;
    border-radius: 1px;
    background-color: #e50012;
  }

  .header_bottm .nav_btn span {
    margin: 4px 0;
  }

  #navs {
    width: 100%;
    display: none;
    padding: 10px 0;
  }

  #navs .x-menu {
    flex-flow: column;
  }

  #navs .x-menu&gt;li {
    border-bottom: 1px solid #eee;
    width: 100%;
  }

  .x-menu&gt;li&gt;a {
    padding: 10px;
    display: block;
    color: #333;
    font-size: 16px;
  }

  #navs .x-sub-menu {
    /* display: none; */
  }
  .x-sub-menu,
  .three-menu,
  .four-menu {
    position: relative;
    top: 0;
    left: 0;
    width: 100%;
    margin: 0;
    padding: 1px 0;
    transform: none;
    background-color: transparent;
  }
  .three-menu,
  .four-menu {
  }
  .x-sub-menu&gt;li&gt;a {
    text-align: left;
    padding: 0 20px;
    color: #333333;
    border-bottom: 1px dashed #eee;
  }
  .three-menu&gt;li&gt;a {
    text-align: left;
    padding: 0 36px;
    color: #333333;
    border-bottom: 1px dashed #eee;
  }
  .four-menu&gt;li&gt;a {
    text-align: left;
    padding: 0 45px;
    color: #333333;
    border-bottom: 1px dashed #eee;
  }
  .x-sub-menu&gt;li:last-child&gt;a,
  .three-menu&gt;li:last-child&gt;a,
  .four-menu&gt;li:last-child&gt;a {
    border-bottom: none;
  }
  

  .menu_btn {
    display: block;
    width: 30px;
    height: 30px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 12px auto;
    background-image: url("../images/nav_down.png");
    top: 28px;
    transition: 0.3s ease;
  }
  .menu_btn.op {
    transform: translateY(-50%) rotate(180deg);
  }
  .x-sub-menu .menu_btn {
    top: 16px;
  }
  .three-menu .menu_btn {
    top: 14px;
  }
  .four-menu .menu_btn {}
}

@media (min-width: 901px) {
  #navs {
    display: block !important;
  }
}

@media (max-width: 640px) {}

/* banner */
@-webkit-keyframes scaleUpDown {
  from {
    -webkit-transform: scale(1.08);
    transform: scale(1.08);
  }

  to {
    -webkit-transform: scale(1);
    transform: scale(1);
  }
}


@keyframes scaleUpDown {
  from {
    -webkit-transform: scale(1.08);
    transform: scale(1.08);
  }

  to {
    opacity: 1;
    -webkit-transform: scale(1);
    transform: scale(1);
  }
}

#banner {
  position: relative;
}

#banner li {
  position: relative;
}

#banner li .imgs {
  display: block;
  overflow: hidden;
}

#banner li .imgs img {
  width: 100%;
  min-height: 150px;
  object-fit: cover;
}

#banner li.swiper-slide-active .imgs img {
  -webkit-animation: scaleUpDown 6s forwards cubic-bezier(0.250, 0.460, 0.450, 0.940);
  animation: scaleUpDown 6s forwards cubic-bezier(0.250, 0.460, 0.450, 0.940);
  animation-iteration-count: infinite;
  animation-direction: alternate;
}

#banner .hi {
  display: none;
}

#banner li .banner_text {
  position: absolute;
  left: 0;
  width: 100%;
  bottom: 25%;
  opacity: 0;
  transition: all 0.6s;
  font-size: 0;
}

#banner li.swiper-slide-active .banner_text {
  opacity: 1;
  bottom: 33%;
}

#banner li .banner_text h2 {
  font-size: 68px;
  font-weight: bold;
  color: #ffffff;
  display: block;
}

#banner li .banner_text h3 {
  font-size: 58px;
  font-weight: bold;
  margin-top: 30px;
  color: #e60013;
  display: block;
}

#banner li .banner_text .b_more {
  display: block;
  width: 150px;
  border: 1px solid #fff;
  border-radius: 24px;
  text-align: center;
  font-size: 18px;
  font-weight: 400;
  line-height: 48px;
  color: #fff;
  transition: all 0.3s;
  margin-top: 48px;
}

#banner li .banner_text .b_more:hover {
  background: #0d0d0f;
  border-color: #0d0d0f;
}

#banner li .banner_video {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}

#banner li .banner_video video {
  display: block;
  width: 100%;
  height: 100%;
  object-position: center;
  object-fit: cover;
}

#banner li .banner_video .play_control {
  display: block;
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
  background-repeat: no-repeat;
  background-size: 91px auto;
  background-position: center;
  background-image: url("../images/play.png");
  cursor: pointer;
}

#banner .swiper-button-prev,
#banner .swiper-button-next {
  width: 50px;
  height: 65px;
  background-color: rgba(255, 255, 255, 0.5);
}

#banner .swiper-button-prev {
  left: 0;
}

#banner .swiper-button-next {
  right: 0;
}

#banner .swiper-button-prev:hover,
#banner .swiper-button-next:hover {
  background-color: #e50012;
}

/* #banner .swiper-button-prev::after,
#banner .swiper-button-next::after {
  width: 16px;
  height: 16px;
  border-color: transparent transparent #4d4d4d #4d4d4d;
  position: relative;
  left: 0;
  top: 0;
  margin: 0;
}

#banner .swiper-button-prev:hover::after,
#banner .swiper-button-next:hover::after {
  border-color: transparent transparent #ffffff #ffffff;
} */

#banner .swiper-pagination {
  bottom: 45px;
}

#banner .swiper-pagination-bullet {
  width: 14px;
  height: 14px;
  margin: 0 8px;
  border: 2px solid #fff;
  background-color: transparent;
  opacity: 1;
}

#banner .swiper-pagination-bullet:hover,
#banner .swiper-pagination-bullet.swiper-pagination-bullet-active {
  background-color: #ffffff;
}

@media (max-width: 1640px) {
  #banner li .banner_text h2 {
    font-size: 56px;
  }

  #banner li .banner_text h3 {
    font-size: 45px;
    margin-top: 28px;
  }
}

@media (max-width: 1400px) {
  #banner li .banner_text {
    bottom: 16%;
  }

  #banner li.swiper-slide-active .banner_text {
    bottom: 25%;
  }

  #banner li .banner_text h2 {
    font-size: 50px;
  }

  #banner li .banner_text h3 {
    font-size: 40px;
    margin-top: 24px;
  }

  #banner li .banner_text .b_more {
    width: 140px;
    font-size: 16px;
    line-height: 42px;
    margin-top: 36px;
  }
}

@media (max-width: 1200px) {}

@media (max-width: 990px) {
  #banner li .banner_text {
    bottom: 25%;
  }

  #banner li.swiper-slide-active .banner_text {
    bottom: 32%;
  }

  #banner li .banner_text h2 {
    font-size: 32px;
  }

  #banner li .banner_text h3 {
    font-size: 26px;
    margin-top: 10px;
  }

  #banner li .banner_text .b_more {
    display: none;
  }

  #banner .swiper-pagination {
    bottom: 36px;
  }
}

@media (max-width: 768px) {
  #banner li .banner_video .play_control {
    background-size: 50px auto;
  }

  #banner .swiper-pagination {
    bottom: 15px;
  }
}

@media (max-width: 640px) {

  #banner li .banner_text h2 {
    font-size: 20px;
  }

  #banner li .banner_text h3 {
    font-size: 18px;
    margin-top: 10px;
  }

  #banner .swiper-pagination {
    bottom: 12px;
  }

  #banner .swiper-pagination-bullet {
    margin: 0 7px;
    width: 12px;
    height: 12px;
  }
}

/* è§†é¢‘ä»‹ç» */
.index_video {
  font-size: 0;
  padding: 20px 0 10px;
}

.index_video .dth_wh {
  display: flex;
  justify-content: space-between;
  align-items: unset;
}

.index_video_vi {
  width: 50%;
  background-color: #dfdfdf;
}

.index_video_vi video {
  width: 100%;
}

.index_video_text {
  width: 50%;
  padding: 5% 3% 5% 4%;
  background-color: #dfdfdf;
}

.index_video_text .tit {}

.index_video_text .wz {
  font-size: 15px;
  line-height: 2;
  color: #333;
}


@media (max-width: 1400px) {}

@media (max-width: 1200px) {}

@media (max-width: 990px) {
  .index_video .dth_wh {
    flex-flow: column;
  }

  .index_video_vi {
    width: 100%;
  }

  .index_video_text {
    width: 100%;
    padding: 6% 4% 4%;
  }
}

@media (max-width: 768px) {}

@media (max-width: 640px) {
  .index_video {
    font-size: 0;
    padding: 10px 0 5px;
  }

  .index_video_text {
    width: 100%;
    padding: 20px 16px 15px;
  }
}

/* æµè¡Œè¶‹åŠ¿ */
.trend {
  padding: 70px 0;
}

.trend .dth_wh {
  justify-content: space-between;
}

.trend_left {
  width: calc(50% - 25px);
}

.trend_right {
  width: calc(50% - 25px);
}

.trend .trend_right .swiper-pagination {
  bottom: 5%;
}

.trend .trend_right .swiper-pagination-bullet {
  width: 10px;
  height: 10px;
  background: #ffffff;
  opacity: 0.5;
  margin: 0 6px;
}

.trend .trend_right .swiper-pagination-bullet.swiper-pagination-bullet-active {
  background-color: #ffffff;
  opacity: 1;
}

.t_lis {
  position: relative;
}

.t_lis .imgs {
  padding-top: calc(500 / 932 * 100%);
}

.t_lis .imgs img {
  transition: all .5s ease;
}

.t_lis:hover .imgs img {
  transform: scale(1.1);
}

.t_lis .text {
  position: absolute;
  left: 0;
  padding: 0 7%;
  bottom: 12%;
  width: 100%;
  transition: all 0.5s;
}

.t_lis:hover .text {
  bottom: 18%;
}

.t_lis .text h3 {
  display: block;
  color: #e60013;
  font-size: 48px;
  font-weight: bold;
  line-height: 1.2;
}

.t_lis .text h4 {
  display: block;
  font-size: 48px;
  font-weight: bold;
  line-height: 1.2;
  color: #ffffff;
  margin-top: 0.2em;
}

.t_lis .text h6 {
  display: block;
  margin: 0;
  font-size: 18px;
  font-weight: bold;
  line-height: 1.3;
  color: #ffffff;
  margin-top: 0.5em;
}

.t_lis .text a {
  display: block;
  width: 140px;
  background: #0d0d0f;
  color: #fff;
  font-weight: normal;
  font-size: 14px;
  line-height: 40px;
  border-radius: 1.5em;
  margin-top: 2.2em;
  opacity: 0;
  transition: all 0.3s;
  text-align: center;
}

.t_lis:hover .text a {
  opacity: 1;
}

.t_lis .text a:hover {
  color: #ffffff;
  background-color: #e50012;
}


@media (max-width: 1440px) {
  .t_lis .text h3 {
    font-size: 42px;
  }

  .t_lis .text h4 {
    font-size: 36px;
  }

  .t_lis .text h6 {
    font-size: 16px;
    font-weight: normal;
  }

  .t_lis .text a {
    width: 120px;
    font-size: 13px;
    line-height: 36px;
    margin-top: 2em;
  }
}

@media (max-width: 1200px) {
  .trend {
    padding: 50px 0;
  }

  .t_lis .text h3 {
    font-size: 32px;
  }

  .t_lis .text h4 {
    font-size: 30px;
    font-weight: normal;
  }

  .t_lis .text h6 {
    font-size: 15px;
  }

  .t_lis .text a {
    width: 110px;
    font-size: 12px;
    margin-top: 1.8em;
  }
}

@media (max-width: 990px) {
  .trend .dth_wh {
    flex-flow: column;
  }

  .trend_left {
    width: 100%;
  }

  .trend_right {
    width: 100%;
    margin-top: 20px;
  }
}

@media (max-width: 768px) {
  .t_lis .text h6 {
    display: none;
  }
}

@media (max-width: 640px) {
  .trend {
    padding: 30px 0;
  }

  .t_lis .text h3 {
    font-size: 24px;
    font-weight: normal;
  }

  .t_lis .text h4 {
    font-size: 20px;
    margin-top: 5px;
  }

  .t_lis .text a {
    width: 100px;
    margin-top: 1.6em;
  }
}


/* æˆ·å¤–è¿åŠ¨ */
.outdoor_sports {
  padding: 88px 0 90px;
}

.outdoor_sports_uls {}

.outdoor_sports_uls ul {
  justify-content: center;
  align-items: center;
}

.outdoor_sports_uls li {
  margin: 0 2.9%;
}

.outdoor_sports_uls li a {
  display: block;
}

.outdoor_sports_uls li h3 {
  display: block;
  font-size: 46px;
  font-weight: bold;
  font-stretch: normal;
  line-height: 4.35;
  letter-spacing: 0px;
  color: #ffffff;
  width: 4.35em;
  position: relative;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  z-index: 10;
  text-align: center;
}

.outdoor_sports_uls li:hover h3 {
  transition: all .5s ease;
  animation: rexiao 0.5s linear;
}

.outdoor_sports_uls li:nth-child(2) h3 {
  color: #000000;
}

.outdoor_sports_uls li h3 img {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  z-index: -1;
}

.outdoor_sports_text {
  /*margin-top: 4.45%;*/
  text-align: center;
  font-size: 36px;
  font-weight: normal;
  font-stretch: normal;
  line-height: 1.5;
  letter-spacing: 0px;
  color: #222222;
}

.outdoor_sports_text .mis {
  font-size: 20px;
  line-height: 1.8;
  margin-top: 1em;
}

.more_a {
  font-size: 0;
}

.more_a a {
  display: inline-block;
  font-size: 15px;
  font-weight: normal;
  font-stretch: normal;
  line-height: 1.5;
  letter-spacing: 0px;
  color: #444444;
  text-decoration: underline;
  margin-top: 1.6em;
}

.more_a a:hover {
  color: #888;
}

@keyframes rexiao {
  0% {
    transform: rotateY(0deg);
  }

  50% {
    transform: rotateY(90deg);
  }

  100% {
    transform: rotateY(0deg);
  }
}

@-webkit-keyframes rexiao {
  0% {
    transform: rotateY(0deg);
  }

  50% {
    transform: rotateY(90deg);
  }

  100% {
    transform: rotateY(0deg);
  }
}

@media (max-width: 1640px) {
  .outdoor_sports {
    padding: 5.36vw 0 5.48vw;
  }

  .outdoor_sports_uls li h3 {
    font-size: 2.8vw;
  }

  .outdoor_sports_text {
    font-size: 2.2vw;
  }

  .outdoor_sports_text .mis {
    font-size: 18px;
  }

  .more_a a {
    font-size: 14px;
  }
}

@media (max-width: 1200px) {
  .outdoor_sports_uls li h3 {
    font-size: 32px;
  }

  .outdoor_sports_text {
    font-size: 26px;
  }

  .outdoor_sports_text .mis {
    font-size: 16px;
  }

  .more_a a {
    margin-top: 1.2em;
  }
}

@media (max-width: 990px) {
  .outdoor_sports {
    padding: 50px 0 40px;
  }

  .outdoor_sports_uls li h3 {
    font-size: 28px;
  }

  .outdoor_sports_text {
    font-size: 24px;
  }

  .outdoor_sports_text .mis {
    font-size: 15px;
  }

  .more_a a {
    margin-top: 1em;
  }
}

@media (max-width: 768px) {}

@media (max-width: 640px) {
  .outdoor_sports {
    padding: 30px 0;
  }

  .outdoor_sports_uls li h3 {
    font-size: 26px;
  }

  .outdoor_sports_text {
    font-size: 20px;
    /*margin-top: 24px;*/
  }

  .outdoor_sports_text .mis {
    font-size: 14px;
  }
}

@media (max-width: 375px) {
  .outdoor_sports_text p * {
    display: block;
  }
}




/* ç›¸åŒæ&nbsp;‡é¢˜ */
.titles {
  text-align: center;
}

.titles h2 {
  font-size: 40px;
  font-weight: bold;
  font-stretch: normal;
  line-height: 1.5;
  letter-spacing: 0px;
  color: #000000;
}

.titles h3 {
  font-size: 20px;
  font-weight: normal;
  font-stretch: normal;
  line-height: 1.5;
  letter-spacing: 0px;
  color: #666666;
  margin-top: 0.3em;
}


@media (max-width: 1640px) {
  .titles h2 {
    font-size: 36px;
  }

  .titles h3 {
    font-size: 18px;
  }
}

@media (max-width: 1200px) {
  .titles h2 {
    font-size: 30px;
  }

  .titles h3 {
    font-size: 16px;
  }
}

@media (max-width: 990px) {
  .titles h2 {
    font-size: 28px;
  }

  .titles h3 {
    font-size: 15px;
  }
}

@media (max-width: 768px) {}

@media (max-width: 640px) {
  .titles h2 {
    font-size: 22px;
  }

  .titles h3 {
    font-size: 14px;
  }
}


/* çŽ¯ä¿ç§‘æŠ€ */
.ecotechnology {
  overflow: hidden;
  position: relative;
}

.ecotechnology .titles {
  position: absolute;
  top: 12.4%;
  left: 50%;
  transform: translateX(-50%);
  width: auto;
  z-index: 30;
}

.ecotechnology .titles h2 {
  color: #ffffff;
}

.ecotechnology .titles h3 {
  color: #ffffff;
  margin-top: 0;
}

.ecotechnology_uls {
  position: relative;
  z-index: 10;
}

.ecotechnology_uls ul {
  justify-content: space-between;
  align-items: unset;
}

.ecotechnology_uls li {
  flex: 1;
}

.ecotechnology_uls li a {
  display: block;
  height: 100%;
  position: relative;
}

.ecotechnology_uls li .imgs {
  width: 100%;
  height: 100%;
}

.ecotechnology_uls li .imgs img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ecotechnology_uls li .text {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ecotechnology_uls li .text .tits {
  font-size: 20px;
  font-weight: bold;
  font-stretch: normal;
  line-height: 2;
  letter-spacing: 0px;
  color: #ffffff;
  text-align: center;
  background-color: rgba(255, 255, 255, 0);
  border-radius: 50%;
  width: 8.8em;
  height: 8.8em;
  display: flex;
  flex-flow: column;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 20;
}

.ecotechnology_uls li .text .tits::before {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.14);
  position: absolute;
  left: 0;
  top: 0;
  z-index: -1;
  opacity: 1;
}

.ecotechnology_uls li:hover .text .tits::before {
  opacity: 0;
  transform: scale(2.5);
  transition: 0.5s ease;
}

.ecotechnology_uls li .text .tits img {
  width: 3em;
  height: 3em;
  object-fit: contain;
}

.ecotechnology_uls li .text .tits h3 {
  font-size: inherit;
  color: inherit;
  display: block;
  margin-top: 0.4em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 1em;
  font-weight: bold;
}

@media (max-width: 1640px) {
  .ecotechnology_uls li .text .tits {
    font-size: 18px;
    margin-top: 10%;
  }
}

@media (max-width: 1200px) {
  .ecotechnology_uls li .text .tits {
    font-size: 17px;
    width: 8em;
    height: 8em;
    margin-top: 20%;
  }
}

@media (max-width: 990px) {
  .ecotechnology .titles {
    top: 50px;
  }

  .ecotechnology_uls ul {
    flex-wrap: wrap;
  }

  .ecotechnology_uls li {
    width: 50%;
    flex: none;
    height: 360px;
  }

  .ecotechnology_uls li .text .tits {
    margin-top: 8%;
  }
}

@media (max-width: 768px) {}

@media (max-width: 640px) {
  .ecotechnology .titles {
    top: 30px;
  }

  .ecotechnology_uls li {
    height: 250px;
  }

  .ecotechnology_uls li:nth-child(n+3) {
    height: 240px;
  }

  .ecotechnology_uls li .text .tits {
    margin-top: 50px;
    font-size: 14px;
  }

  .ecotechnology_uls li:nth-child(n+3) .text .tits {
    margin-top: 0;
  }

  .ecotechnology_uls li .text .tits h3 {
    font-weight: normal;
  }
}



/* æ»šåŠ¨è§†é¢‘ */
.scrolling_video {
  background-color: #f6f6f6;
  padding: 88px 0;
  position: relative;
}

.scrolling_video .dth_wh {
  position: relative;
}

.scrolling_video li {
  width: 554px;
  position: relative;
}

.scrolling_video li a {
  display: block;
}

.scrolling_video li .vido {
  padding-top: calc(360 / 554 * 100%);
}

.scrolling_video li .vido video {
  width: 100%;
  height: 100%;
  object-position: center;
  object-fit: cover;
  position: absolute;
  left: 0;
  top: 0;
}

.scrolling_video li .vido_btn {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background-repeat: no-repeat;
  background-position: center;
  background-size: 14% auto;
  background-image: url("../images/video_btn.png");
  cursor: pointer;
}

.scrolling_video_open {
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  z-index: 98;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  transform: scale(0);
}

.scrolling_video_open.open {
  transform: scale(1);
}

.scrolling_video_open .banx {
  width: 80%;
  max-width: 800px;
  height: auto;
  max-height: 80%;
  position: relative;
}

.scrolling_video_open video {
  max-width: 100%;
  max-height: 100%;
  width: 1200px;
  height: auto;
}

.scrolling_video_open .close_vi {
  position: absolute;
  right: -40px;
  top: 0;
  display: block;
  width: 30px;
  height: 30px;
  cursor: pointer;
}

.scrolling_video_open .close_vi::before,
.scrolling_video_open .close_vi::after {
  content: "";
  display: block;
  width: 100%;
  height: 2px;
  background-color: #ffffff;
  position: absolute;
  left: 0;
  top: calc(50% - 1px);
}

.scrolling_video_open .close_vi::before {
  transform: rotate(45deg)
}

.scrolling_video_open .close_vi::after {
  transform: rotate(-45deg)
}

.scrolling_video li .text {
  padding: 7.2% 5%;
  text-align: center;
}

.scrolling_video li .text h5 {
  display: block;
  font-size: 18px;
  font-weight: normal;
  font-stretch: normal;
  line-height: 1.67;
  letter-spacing: 0px;
  color: #333333;
}

.scrolling_video .swiper-scrollbar {
  height: 3px;
  background-color: rgba(0, 0, 0, 0.08);
  margin-top: 4px;
  border-radius: 3px;
  overflow: hidden;
}

.scrolling_video .swiper-scrollbar .swiper-scrollbar-drag {
  background-color: rgba(0, 0, 0, 0.7);
  border-radius: inherit;
}

.scrolling_video .swiper-button-prev,
.scrolling_video .swiper-button-next {
  background-repeat: no-repeat;
  background-position: center;
  background-size: auto;
  transform: none;
  top: 31.6%;
  margin: 0;
}

.scrolling_video .swiper-button-prev {
  background-image: url("../images/arrow_left.png");
}

.scrolling_video .swiper-button-next {
  background-image: url("../images/arrow_right.png");
}

.scrolling_video .swiper-button-prev::after,
.scrolling_video .swiper-button-next::after {
  display: none;
}

@media (max-width: 1640px) {
  .scrolling_video {
    padding: 5.3vw 0;
  }

  .scrolling_video li {
    width: 33.8vw;
  }

  .scrolling_video li .text h5 {
    font-size: 1.1vw;
  }
}

@media (max-width: 1400px) {
  .scrolling_video li .text h5 {
    font-size: 15px;
  }
}

@media (max-width: 1200px) {
  .scrolling_video li {
    width: 420px;
  }
}

@media (max-width: 990px) {
  .scrolling_video {
    padding: 40px 0;
  }

  .scrolling_video li {
    width: 360px;
  }
}

@media (max-width: 768px) {
  .scrolling_video_open .banx {
    width: 95%;
  }

  .scrolling_video_open .close_vi {
    right: 0;
    top: -40px;
  }
}

@media (max-width: 640px) {}


/* ä½¿ç”¨åœºæ™¯ */
.scenes_used {
  padding: 70px 0 115px;
}

.scenes_used_cont {
  margin-top: 3.9%;
}

.scenes_used_cont ul {
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
}

.scenes_used_cont li {
  width: 31.6%;
  margin-right: 2.6%;
}

.scenes_used_cont li:nth-child(3n) {
  margin-right: 0;
}

.scenes_used_cont li:nth-child(n+4) {
  margin-top: 3%;
}

.scenes_used_cont li a {
  display: block;
  position: relative;
}

.scenes_used_cont li .imgs {
  padding-top: calc(450 / 480 * 100%);
}

.scenes_used_cont li .text {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-flow: column;
  padding: 8.9% 5%;
  background-image: -webkit-linear-gradient(top, rgba(11, 19, 30, 0.01), rgba(11, 19, 30, 0.44));
}

.scenes_used_cont li .text h3 {
  display: block;
  font-size: 22px;
  font-weight: bold;
  font-stretch: normal;
  line-height: 1.5;
  letter-spacing: 0px;
  color: #ffffff;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.scenes_used_cont li .text .summ {
  display: block;
  width: 100%;
  font-size: 15px;
  line-height: 1.8;
  font-weight: normal;
  text-align: center;

  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  color: #ffffff;
  /*height: 0;*/
  opacity: 0;
  transition: 1s ease;
  margin: 0;
}

.scenes_used_cont li:hover .text .summ {
  /*height: 3.6em;*/
  opacity: 1;
  margin: 2% 0 8%;
}

@media (max-width: 1640px) {
  .scenes_used {
    padding: 4.2vw 0 7vw;
  }

  .scenes_used_cont li .text h3 {
    font-size: 20px;
  }
}

@media (max-width: 1200px) {
  .scenes_used {
    padding: 50px 0;
  }

  .scenes_used_cont li .text h3 {
    font-size: 18px;
  }
}

@media (max-width: 990px) {
  .scenes_used_cont li .text .summ {
    font-size: 14px;
    opacity: 1;
    height: 3.6em;
    margin: 5% 0 10%;
  }

  .scenes_used_cont li:hover .text .summ {
    margin: 5% 0 10%;
  }
}

@media (max-width: 768px) {
  .scenes_used_cont ul {
    justify-content: space-between;
  }

  .scenes_used_cont li {
    width: 48%;
    margin-right: 0;
  }

  .scenes_used_cont li:nth-child(n+3) {
    margin-top: 4%;
  }

  .scenes_used_cont li .text .summ {
    font-size: 14px;
    margin: 5% 0;
  }

  .scenes_used_cont li:hover .text .summ {
    margin: 5% 0;
  }
}

@media (max-width: 640px) {
  .scenes_used {
    padding: 40px 0 30px;
  }

  .scenes_used_cont li .text h3 {
    font-size: 17px;
  }

  .scenes_used_cont {
    margin-top: 20px;
  }

  .scenes_used_cont li .text .summ {
    font-size: 14px;
    margin: 4% 0 0%;
  }

  .scenes_used_cont li:hover .text .summ {
    margin: 4% 0 0%;
  }
}


/* é”€å”®ç½‘ç»œ */
.sales_network {
  padding: 72px 0 100px;
}

.sales_network_cont {
  margin-top: 4.3%;
  text-align: center;
}

.sales_network_cont img {
  max-width: 100%;
  object-fit: contain;
}


@media (max-width: 1640px) {
  .sales_network {
    padding: 4.39vw 0 6vw;
  }
}

@media (max-width: 1200px) {
  .sales_network {
    padding: 50px 0;
  }
}

@media (max-width: 990px) {
  .sales_network {
    padding: 50px 0 40px;
  }
}

@media (max-width: 768px) {}

@media (max-width: 640px) {
  .sales_network {
    padding: 40px 0 20px;
  }

  .sales_network_cont {
    margin-top: 30px;
  }
}


/* åº•éƒ¨ */
.ft_back_top {
  position: relative;
}

#back_top_btn {
  display: block;
  margin-left: auto;
  width: 40px;
  height: 40px;
  background-color: #0d0d0f;
  color: #ffffff;
  text-align: center;
  line-height: 40px;
  font-size: 20px;
  transform: rotate(90deg);
  cursor: pointer;
}


footer {
  background-color: #fff;
}

.lang_b {
  text-align: right;
}

.lang_cont {
  border-bottom: 2px solid #c4c4c4;
  font-size: 16px;
  font-weight: normal;
  font-stretch: normal;
  line-height: 2;
  letter-spacing: 0px;
  color: #666666;
  padding: 1.2em 0;
}

.lang_cont span {
  font-family: SimSun;
  margin-left: 2em;
}

.footer_top {
  padding: 45px 0;
}

.footer_top .dth_wh {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;

}

.footer_nav {
  width: 55.8%;
  padding-right: 20px;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
}

.footer_nav dl {
  flex: 1;
  padding-right: 5%;
}

.footer_nav dt {
  color: #333333;
  font-size: 20px;
  font-weight: normal;
  margin-bottom: 0.8em;
  line-height: 1.5;
}

.footer_nav dd {}

.footer_nav dd a {
  display: block;
  font-size: 16px;
  font-weight: normal;
  font-stretch: normal;
  line-height: 2.4;
  letter-spacing: 0px;
  color: #777777;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

.footer_nav dd a:hover {
  color: #e50012;
}

.footer_ewm {
  width: 140px;
  margin-left: auto;
  text-align: center;
}

.footer_ewm img {
  max-width: 100%;
}

.footer_ewm p {
  font-size: 14px;
  font-weight: normal;
  font-stretch: normal;
  line-height: 1.7;
  letter-spacing: 0px;
  color: #777777;
}

.footer_ewm p:nth-child(2) {
  margin-top: 0.7em;
}

.footer_contact {
  margin-left: auto;
  width: auto;
  max-width: 25%;
}

.footer_contact p {
  margin: 0;
}

.footer_contact h6 {
  display: block;
  margin: 0;
  color: #777777;
  font-size: 15px;
  line-height: 1.5;
}

.footer_contact .pho {
  font-size: 30px;
  font-weight: bold;
  line-height: 1.5;
  color: #000000;
  font-family: Helvetica, Arial, sans-serif;
}

.footer_contact .txt {
  color: #777777;
  font-size: 15px;
  line-height: 2;
  margin-top: 1.2em;
}


.footer_bottom {
  padding: 25px 0;
  /* border-top: 1px solid #262627; */
}

.footer_bottom .dth_wh {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.footer_bottom_bq {
  font-size: 15px;
  font-weight: normal;
  font-stretch: normal;
  line-height: 1.8;
  letter-spacing: 0px;
  color: #888888;
}

.footer_bottom_bq a {
  color: inherit;
}

.footer_bottom_bq a:hover {
  color: #e50012;
}

.foot_share {}

.foot_share a {
  margin: 0 4px;
  width: 28px;
  color: #fff;
  display: inline-block;
  height: 28px;
  background-repeat: no-repeat;
  background-position: center;
  background-size: auto;
}

.foot_share .share_facebook2 {
  background-image: url("../images/facebook.png");
}

.foot_share .share_twitter2 {
  background-image: url("../images/twitter.png");
}

.foot_share .share_linkedin2 {
  background-image: url("../images/linkedin.png");
}

.foot_share .share_instagram {
  background-image: url("../images/instagram.png");
}

.foot_share .share_youtube {
  background-image: url("../images/youtube.png");
}

@media (max-width: 1640px) {
  .lang_cont {
    font-size: 15px;
  }
}

@media (max-width: 1200px) {
  .lang_cont {
    font-size: 14px;
    padding: 1em 0;
  }

  .footer_nav dt {
    font-size: 18px;
  }

  .footer_contact .pho {
    font-size: 28px;
  }
}

@media (max-width: 990px) {
  .lang_cont {
    font-size: 13px;
    padding: 0.8em 0;
  }

  .footer_top .dth_wh {
    flex-wrap: wrap;
    justify-content: space-between;
  }

  .footer_nav {
    display: none;
  }

  .footer_ewm {
    margin: 0;
    width: 130px;
  }

  .footer_ewm p {
    font-size: 13px;
  }

  .footer_contact {
    margin-left: 0;
    width: calc(95% - 140px);
    max-width: 100%;
  }

  .footer_contact .pho {
    font-size: 26px;
  }

  .footer_contact .txt {
    font-size: 14px;
  }

  .footer_bottom_bq {
    font-size: 14px;
  }
}

@media (max-width: 768px) {
  .foot_share {
    display: none;
  }

  .footer_bottom {
    padding: 15px 0;
  }

  .footer_bottom_bq {
    font-size: 13px;
  }
}

@media (max-width: 640px) {
  .lang_cont {
    padding: 0.5em 0;
    border-width: 1px;
  }

  .footer_top {
    padding: 30px 0 0;
  }

  .footer_contact {
    width: 100%;
  }

  .footer_contact .pho {
    font-size: 24px;
  }

  .footer_contact .txt {
    font-size: 14px;
    margin-top: 5px;
    line-height: 1.8;
  }

  .footer_ewm {
    width: 120px;
    margin-top: 10px;
  }

  .footer_ewm p {
    font-size: 12px;
  }

  .footer_bottom_bq {
    font-size: 12px;
  }
}

/* å®¢æœæ&nbsp;·å¼ */
#toolbar {
  right: 0;
  bottom: 50%;
}


#toolbar ul {
  transform: translateX(57px);
  transition: 0.8s ease;
}

#toolbar.open ul {
  transform: translateX(0);
}

.kf_btn {
  cursor: pointer;
  background-color: #e4e4e4;
  width: 30px;
  height: 30px;
  padding: 5px 8px;
  line-height: 20px;
  align-self: flex-end;
  margin-top: 1px;
  margin-left: auto;
}

.kf_btn.open {}

.kf_btn:after {
  content: "&lt;&lt;";
  display: block;
  color: #999;
  font-size: 14px;
  font-family: SimSun;
  text-align: center;
  transition: 1s ease;
}

.kf_btn.open:after {
  content: "&gt;&gt;";
}


.back_top {
  position: fixed;
  z-index: 90;
  right: 10px;
  bottom: 20px;
  width: 50px;
  height: 50px;
  background-repeat: no-repeat;
  background-position: center;
  background-image: url("../images/back_top.png"); 
  cursor: pointer;
  display: none;
}
@media (max-width: 640px) {
  .back_top {
    width: 40px;
    height: 40px;
    bottom: 10px;
    right: 8px;
    background-size: contain;
  }
}</pre></body></html>