header {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 999;
  /* 新增：导航栏隐藏状态（收起） */
  /* 保留您原有的样式 */
}
header .fixed-nav {
  position: fixed;
  width: 100%;
  top: -1.57rem;
  -webkit-transition: top 0.5s;
  -moz-transition: top 0.5s;
  -o-transition: top 0.5s;
  transition: top 0.5s;
}
header .fixed-nav-hidden {
  position: fixed;
  width: 100%;
  top: -100px;
  /* 完全隐藏，您可以根据导航栏实际高度调整这个值 */
  z-index: 999;
  -webkit-transition: top 0.4s ease-in-out;
  -moz-transition: top 0.4s ease-in-out;
  -o-transition: top 0.4s ease-in-out;
  transition: top 0.4s ease-in-out;
}
header > .mod_container.fixed-nav-appear {
  top: 0;
  background: #fff;
}
header > .mod_container.fixed-nav-appear #LOGO1 {
  display: none;
}
header > .mod_container.fixed-nav-appear #LOGO2 {
  display: block;
}
header > .mod_container.fixed-nav-appear .nav_bar nav .nav_links li .nav-a {
  color: #000;
}
header > .mod_container.fixed-nav-appear .nav_bar nav .nav_links li .burger .burger__a:before,
header > .mod_container.fixed-nav-appear .nav_bar nav .nav_links li .burger .burger__b:before {
  background: #000;
}
header > .mod_container.fixed-nav-appear .nav_bar nav .nav_links li .burger .burger__a:after,
header > .mod_container.fixed-nav-appear .nav_bar nav .nav_links li .burger .burger__b:after {
  background: #000;
}
header .fix_sec {
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 999;
  -webkit-transition: top 0.5s;
  -moz-transition: top 0.5s;
  -o-transition: top 0.5s;
  transition: top 0.5s;
}
header #LOGO1 {
  display: block;
}
header #LOGO2 {
  display: none;
}
header > .mod_container {
  width: 100%;
}
header > .mod_container .quick_links {
  position: fixed;
  right: 0;
  top: 0;
  transform: rotate(-90deg) translateY(-100%);
  transform-origin: right top;
  z-index: 99;
  border-radius: 0.05rem 0rem 0rem 0rem;
  overflow: hidden;
}
header > .mod_container .quick_links a {
  height: 0.8rem;
  width: 2.37rem;
  font-size: 0.18rem;
  color: #fff;
  line-height: calc(25/18);
  font-family: 'FuturaCyrillicBook', 'SourceHanSansHKRegular';
  display: flex;
  justify-content: center;
  align-items: center;
  letter-spacing: 0.03rem;
}
header > .mod_container .quick_links a:before {
  background: #e21f2c;
  bottom: 0;
  content: "";
  display: block;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
  z-index: -2;
}
header > .mod_container .quick_links a:after {
  background: #b82229;
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0, 1);
  z-index: -1;
  bottom: 0;
  content: "";
  display: block;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
}
header > .mod_container .quick_links a:hover:after {
  transform: scaleY(1);
  transform-origin: bottom center;
}
header > .mod_container .quick_links a:hover span:after {
  opacity: 1;
  transform: translateY(0);
}
header > .mod_container .quick_links a:hover span span {
  opacity: 0;
  transform: translateY(-100%);
}
header > .mod_container .quick_links a span {
  display: block;
  overflow: hidden;
  position: relative;
  text-align: center;
}
header > .mod_container .quick_links a span:after {
  bottom: 0;
  color: currentColor;
  content: attr(data-label);
  display: block;
  opacity: 0;
  position: absolute;
  top: 0;
  transform: translateY(100%);
  transition: opacity 0.3s, transform 0.3s;
  width: 100%;
}
header > .mod_container .quick_links a span span {
  display: block;
  transition: opacity 0.3s, transform 0.3s;
}
header > .mod_container .quick_links a .icon_box {
  width: 0;
  height: 0;
}
header > .mod_container .quick_links a .icon_box img {
  width: 0;
}
header > .mod_container .quick_links.move {
  width: 3.8rem;
  height: 1rem;
  position: fixed;
  top: unset;
  bottom: 0;
  right: 0;
  transform: unset;
  padding: 0.2rem;
}
header > .mod_container .quick_links.move a {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
}
header > .mod_container .quick_links.move a span {
  width: 100%;
  text-align: left;
}
header > .mod_container .quick_links.move a .icon_box {
  width: 0.2rem;
  height: 0.25rem;
  display: flex;
  justify-content: flex-end;
  align-items: flex-end;
}
header > .mod_container .quick_links.move a .icon_box img {
  width: 0.2rem;
}
header > .mod_container .nav_bar {
  height: 1.57rem;
  background: transparent;
  padding: 0.41rem 1rem 0.24rem 0.22rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header > .mod_container .nav_bar .logo {
  color: #F4F4F4;
  text-decoration: none;
}
header > .mod_container .nav_bar .logo .img_box {
  width: 1.61rem;
  height: 0.92rem;
}
header > .mod_container .nav_bar .logo .img_box img {
  height: 100%;
}
header > .mod_container .nav_bar nav {
  height: 100%;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 0.75rem;
}
header > .mod_container .nav_bar nav .nav_links {
  display: flex;
  align-items: center;
  gap: 0.53rem;
  height: 100%;
}
header > .mod_container .nav_bar nav .nav_links li {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
header > .mod_container .nav_bar nav .nav_links li .nav-a {
  display: block;
  cursor: pointer;
  width: 100%;
  height: 100%;
  color: #fff;
  font-size: 0.18rem;
  line-height: calc(22/18);
  font-family: 'FuturaCyrillicMedium', 'SourceHanSansHKMedium';
  text-decoration: none;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header > .mod_container .nav_bar nav .nav_links li .nav-a:before {
  display: block;
  content: "";
  position: absolute;
  bottom: -0.03rem;
  left: 0;
  height: 0.01rem;
  background-color: #fff;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0, 1);
  width: 100%;
}
header > .mod_container .nav_bar nav .nav_links li .nav-a:hover:before {
  transform: scaleX(1);
  transform-origin: left center;
}
header > .mod_container .nav_bar nav .nav_links li .burger {
  width: 0.8rem;
  clip-path: polygon(-33% -33%, 133% -33%, 133% 133%, -33% 133%);
  display: block;
  height: 0.24rem;
  position: relative;
  cursor: pointer;
}
header > .mod_container .nav_bar nav .nav_links li .burger:hover .burger__a {
  transform: translateX(-100%);
}
header > .mod_container .nav_bar nav .nav_links li .burger:hover .burger__a:before {
  transform: scaleX(100%);
  transform-origin: bottom right;
}
header > .mod_container .nav_bar nav .nav_links li .burger:hover .burger__a:after {
  transform: scaleX(0);
  transform-origin: bottom left;
}
header > .mod_container .nav_bar nav .nav_links li .burger:hover .burger__b {
  transform: translateX(100%);
}
header > .mod_container .nav_bar nav .nav_links li .burger:hover .burger__b:before {
  transform: scaleX(100%);
  transform-origin: bottom left;
}
header > .mod_container .nav_bar nav .nav_links li .burger:hover .burger__b:after {
  transform: scaleX(0);
  transform-origin: bottom right;
}
header > .mod_container .nav_bar nav .nav_links li .burger .burger__a {
  top: 44%;
}
header > .mod_container .nav_bar nav .nav_links li .burger .burger__a:before {
  left: 100%;
  transform-origin: bottom right;
  transform: scaleX(0);
}
header > .mod_container .nav_bar nav .nav_links li .burger .burger__a:after {
  left: 0;
  transform-origin: bottom left;
  transform: scaleX(100%);
}
header > .mod_container .nav_bar nav .nav_links li .burger .burger__b {
  bottom: 26%;
}
header > .mod_container .nav_bar nav .nav_links li .burger .burger__b:before {
  left: -100%;
  transform: scaleX(0);
  transform-origin: bottom left;
}
header > .mod_container .nav_bar nav .nav_links li .burger .burger__b:after {
  left: 0;
  transform-origin: bottom right;
  transform: scaleX(100%);
}
header > .mod_container .nav_bar nav .nav_links li .burger .burger__a,
header > .mod_container .nav_bar nav .nav_links li .burger .burger__b {
  display: block;
  height: 1px;
  left: 0;
  position: absolute;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0, 1);
  width: 100%;
}
header > .mod_container .nav_bar nav .nav_links li .burger .burger__a:before,
header > .mod_container .nav_bar nav .nav_links li .burger .burger__b:before {
  background: #fff;
  content: "";
  display: block;
  height: 100%;
  position: absolute;
  top: 0;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0, 1);
  width: 100%;
}
header > .mod_container .nav_bar nav .nav_links li .burger .burger__a:after,
header > .mod_container .nav_bar nav .nav_links li .burger .burger__b:after {
  background: #fff;
  content: "";
  display: block;
  height: 100%;
  position: absolute;
  top: 0;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0, 1);
  width: 100%;
}
header > .mod_container .nav_bar nav .nav_links li .menu-box {
  position: absolute;
  left: -0.2rem;
  top: 100%;
  overflow: hidden;
  height: 0;
  transition: all 0.2s ease-in;
}
header > .mod_container .nav_bar nav .nav_links li .menu-box .menu-list {
  background-color: #febd14;
  padding: 0.2rem 0.2rem 0.2rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 0.1rem;
  border-radius: 0.08rem;
}
header > .mod_container .nav_bar nav .nav_links li .menu-box .menu-item {
  font-size: 0.18rem;
  color: #fff;
  line-height: calc(26/18);
  font-family: 'FuturaCyrillicBook', 'SourceHanSansHKRegular';
  text-decoration: none;
  white-space: nowrap;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.1rem;
}
header > .mod_container .nav_bar nav .nav_links li .menu-box .menu-item:hover span {
  color: #fff;
}
header > .mod_container .nav_bar .tool {
  display: none;
}
header > .mod_container .nav_bar .menu-btn {
  position: relative;
  z-index: 2;
  display: none;
}
header > .mod_container .nav_bar .menu-btn .center-line {
  position: relative;
  width: 0.25rem;
}
header > .mod_container .nav_bar .menu-btn .center-line::after,
header > .mod_container .nav_bar .menu-btn .center-line::before {
  content: '';
  width: 100%;
  height: 0.02rem;
  background-color: #26608c;
  display: block;
  transform: rotate(0);
  transition: 0.35s;
}
header > .mod_container .nav_bar .menu-btn .center-line::before {
  position: absolute;
  left: 0;
  top: 0;
}
header > .mod_container .nav_bar .menu-btn::after,
header > .mod_container .nav_bar .menu-btn::before {
  margin-top: 0.06rem;
  content: '';
  width: 100%;
  height: 0.02rem;
  background-color: #26608c;
  display: block;
  transition: width 0.35s;
}
header > .mod_container .nav_bar .menu-btn::before {
  margin-top: 0;
  margin-bottom: 0.06rem;
}
header > .mod_container .nav_bar .menu-btn.active .center-line::after {
  transform: rotate(45deg);
}
header > .mod_container .nav_bar .menu-btn.active .center-line::before {
  transform: rotate(-45deg);
}
header > .mod_container .nav_bar .menu-btn.active::after,
header > .mod_container .nav_bar .menu-btn.active::before {
  width: 0;
}
header > .mod_container .language_btn {
  font-size: 0.26rem;
  line-height: 1;
  color: #000;
  font-family: 'FuturaCyrillicBook', 'SourceHanSansHKRegular';
  padding: 0.4rem 0.2rem 0.1rem;
  background: #fff;
}
header > .mod_container .language_btn span {
  display: block;
  width: 0.48rem;
  height: 0.48rem;
  padding: 0.06rem 0;
  border-radius: 50%;
  border: 0.03rem solid #17171b;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #e21f2c;
}
header > .mod_container .header__menu {
  height: calc(100vh);
  background: #fff;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
}
header > .mod_container .header__menu .menu_box {
  width: 50%;
  height: calc(100vh);
  display: flex;
}
header > .mod_container .header__menu .menu_box.menu_left {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}
header > .mod_container .header__menu .menu_box.menu_left .menu_left_bg {
  width: 100%;
  height: 100%;
  background: #e21f2c;
  flex-shrink: 0;
}
header > .mod_container .header__menu .menu_box.menu_left .logo_box {
  position: absolute;
  top: 0.4rem;
  left: 0.2rem;
  z-index: 2;
  width: 1.61rem;
  height: 0.92rem;
}
header > .mod_container .header__menu .menu_box.menu_left .logo_box img {
  height: 100%;
}
header > .mod_container .header__menu .menu_box.menu_left .img_wrap {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}
header > .mod_container .header__menu .menu_box.menu_left .img_wrap .img_box {
  width: 4.7575rem;
  height: 7.1363rem;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
}
header > .mod_container .header__menu .menu_box.menu_left .img_wrap .img_box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  flex-shrink: 0;
}
header > .mod_container .header__menu .menu_box.menu_right {
  background: #dddddd;
  display: flex;
  flex-direction: column;
  position: relative;
}
header > .mod_container .header__menu .menu_box.menu_right .header__menu__menu__close {
  position: absolute;
  top: 20px;
  right: 20px;
}
header > .mod_container .header__menu .menu_box.menu_right .header__menu__menu__close .close {
  display: block;
  width: 100px;
  height: 100px;
  overflow: hidden;
  position: relative;
  transform: rotate(45deg);
}
header > .mod_container .header__menu .menu_box.menu_right .header__menu__menu__close .close .close__a {
  display: block;
  width: 100%;
  height: 1px;
  background: #17171b;
  position: absolute;
  top: 50%;
  left: 0;
}
header > .mod_container .header__menu .menu_box.menu_right .header__menu__menu__close .close .close__b {
  display: block;
  width: 1px;
  height: 100%;
  background: #17171b;
  position: absolute;
  top: 0;
  left: 50%;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list {
  padding: 0.54rem 0.4rem;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  background: #fff;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul {
  width: 6.8rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-height: 0.46rem;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .nav-a {
  font-size: 0.46rem;
  line-height: 1;
  color: #000;
  font-family: 'FuturaCyrillicBook', 'SourceHanSansHKRegular';
  width: unset;
  display: flex;
  gap: 1rem;
  align-items: center;
  position: relative;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .nav-a:before {
  display: block;
  content: "";
  position: absolute;
  bottom: -0.03rem;
  left: 0;
  height: 0.01rem;
  background-color: #000;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0, 1);
  width: 100%;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .nav-a:hover:before {
  transform: scaleX(1);
  transform-origin: left center;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .nav-a i {
  display: block;
  width: 0.3rem;
  height: 0.3rem;
  background: url(/html-before/static/image/icon_6.png) no-repeat;
  background-size: 100% 100%;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .nav-a.active i {
  display: block;
  width: 0.3rem;
  height: 0.3rem;
  background: url(/html-before/static/image/icon_7.png) no-repeat;
  background-size: 100% 100%;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .sub_menu {
  height: 0;
  transition: all 0.3s ease-in;
  overflow: hidden;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .sub_menu.active {
  transition: all 0.3s ease-in;
  height: auto;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .sub_menu .sub_menu_list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.5rem;
  padding: 0.2rem 0 0.1rem;
  max-width: 90%;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .sub_menu .sub_menu_list a {
  font-size: 0.3rem;
  line-height: 1;
  color: #000;
  font-family: 'FuturaCyrillicBook', 'SourceHanSansHKRegular';
  display: block;
  position: relative;
  min-width: 2.35rem;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .sub_menu .sub_menu_list a span {
  position: relative;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .sub_menu .sub_menu_list a span:before {
  display: block;
  content: "";
  position: absolute;
  bottom: -0.03rem;
  left: 0;
  height: 0.01rem;
  background-color: #000;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0, 1);
  width: 100%;
}
header > .mod_container .header__menu .menu_box.menu_right .menu_list ul li .sub_menu .sub_menu_list a:hover span:before {
  transform: scaleX(1);
  transform-origin: left center;
}
.mask-box {
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(0.1rem);
  z-index: 998;
  transform: translateX(100%);
  transition: transform 0.35s ease-in-out;
  display: none;
}
.mask-box.open {
  transform: translateX(0);
}
@media screen and (max-width: 992px) {
  header {
    background-color: #F4F4F4;
    color: #1C1C1C;
    width: 100%;
    height: 0.56rem;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 999;
    padding: 0;
  }
  header > .mod_container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    position: relative;
  }
  header > .mod_container .header__menu {
    display: none !important;
  }
  header > .mod_container .quick_links {
    transform: unset;
    top: 0.13rem;
    right: 30%;
    height: 0.3rem;
    width: 1.3rem;
    border-radius: 0;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  header > .mod_container .quick_links a {
    color: red;
    width: unset;
    height: unset;
  }
  header > .mod_container .quick_links a:before,
  header > .mod_container .quick_links a:after {
    display: none;
  }
  header > .mod_container .language_btn {
    font-size: 0.14rem;
    color: #fff;
    padding: 0;
    background: unset;
  }
  header > .mod_container .language_btn span {
    border: none;
    border: 0.01rem solid #fff;
    width: 0.3rem;
    height: 0.3rem;
    color: #fff;
  }
  header > .mod_container .nav_bar {
    width: 100%;
    height: 0.56rem;
    margin: 0;
    border-radius: 0;
    padding: 0 0.16rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #e21f2c;
    box-shadow: unset;
    position: relative;
  }
  header > .mod_container .nav_bar .logo {
    color: #F4F4F4;
    text-decoration: none;
    visibility: unset !important;
  }
  header > .mod_container .nav_bar .logo .img_box {
    width: auto;
    height: 0.4rem;
  }
  header > .mod_container .nav_bar .logo .img_box img {
    height: 100%;
  }
  header > .mod_container .nav_bar nav {
    position: absolute;
    top: 100%;
    right: 0;
    padding: 0.4rem 0 0.3rem;
    background-color: #fff;
    width: 100%;
    max-width: 4rem;
    height: calc(100vh - 0.56rem);
    transform: translateX(100%);
    transition: transform 0.35s ease-in-out;
    overflow-y: auto;
    flex-direction: column-reverse;
  }
  header > .mod_container .nav_bar nav.open {
    transform: translateX(0);
    box-shadow: inset 0 0.01rem 0.06rem rgba(0, 0, 0, 0.15);
    align-items: flex-start;
    justify-content: flex-end;
    gap: 0.2rem;
  }
  header > .mod_container .nav_bar nav .nav_links {
    flex-direction: column;
    align-items: stretch;
    gap: 0.1rem;
    padding: 0;
    width: 100%;
    padding: 0 0 0 0.3rem;
  }
  header > .mod_container .nav_bar nav .nav_links li {
    font-size: 0.16rem;
    visibility: unset !important;
  }
  header > .mod_container .nav_bar nav .nav_links li .nav-a {
    width: 100%;
    padding: 0.08rem 0;
    justify-content: flex-start;
    color: #17171b;
    left: unset !important;
  }
  header > .mod_container .nav_bar nav .nav_links li .nav-a.active,
  header > .mod_container .nav_bar nav .nav_links li .nav-a:hover {
    color: #e21f2c;
  }
  header > .mod_container .nav_bar nav .nav_links li .burger {
    display: none;
  }
  header > .mod_container .nav_bar nav .nav_links li .menu-box {
    position: absolute;
    left: 100%;
    right: 0;
    top: 0;
    bottom: 0;
    display: block !important;
    min-height: auto;
    height: calc(100vh - 0.56rem);
    overflow: hidden;
    transition: height 0.35s ease-in-out;
    border-top: none;
    padding-top: 0;
  }
  header > .mod_container .nav_bar nav .nav_links li .menu-box .tit {
    display: none;
  }
  header > .mod_container .nav_bar nav .nav_links li .menu-box .menu-list {
    flex-direction: column;
    width: 100%;
    height: 100%;
    background: #e21f2c;
    padding: 0.1rem;
  }
  header > .mod_container .nav_bar nav .nav_links li .menu-box .menu-list .menu-item {
    width: 100%;
    font-size: 0.14rem;
  }
  header > .mod_container .nav_bar .tool {
    display: flex;
    align-items: center;
    gap: 0.2rem;
  }
  header > .mod_container .nav_bar .menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
  }
  header > .mod_container .nav_bar .menu-btn .center-line {
    position: relative;
    width: 0.2rem;
  }
  header > .mod_container .nav_bar .menu-btn .center-line::after,
  header > .mod_container .nav_bar .menu-btn .center-line::before {
    content: '';
    width: 100%;
    height: 0.02rem;
    background-color: #fff;
    display: block;
    transform: rotate(0);
    transition: 0.35s;
  }
  header > .mod_container .nav_bar .menu-btn .center-line::before {
    position: absolute;
    left: 0;
    top: 0;
  }
  header > .mod_container .nav_bar .menu-btn::after,
  header > .mod_container .nav_bar .menu-btn::before {
    margin-top: 0.06rem;
    content: '';
    width: 100%;
    height: 0.02rem;
    background-color: #fff;
    display: block;
    transition: width 0.35s;
  }
  header > .mod_container .nav_bar .menu-btn::before {
    margin-top: 0;
    margin-bottom: 0.06rem;
  }
  header > .mod_container .nav_bar .menu-btn.active .center-line::after {
    transform: rotate(45deg);
  }
  header > .mod_container .nav_bar .menu-btn.active .center-line::before {
    transform: rotate(-45deg);
  }
  header > .mod_container .nav_bar .menu-btn.active::after,
  header > .mod_container .nav_bar .menu-btn.active::before {
    width: 0;
  }
  header > .fixed-nav-appear #LOGO1 {
    display: block;
  }
  header > .fixed-nav-appear #LOGO2 {
    display: none;
  }
  .mask-box {
    display: block;
  }
}