#top_head {
  position: absolute;
  top: 0px;
  width: 100%;
  z-index: 999;
  padding: 30px 0;
}

.max1440 {
  max-width: 1470px;
  padding-left: 15px;
  padding-right: 15px;
  margin: 0 auto;
}

.phone_serve {
  cursor: pointer;
}

.menu {
  margin-top: 5px;
}

.menu>li {
  float: left;
  position: relative;
  margin: 0 0.15vw;
}

.menu>li>a {
  display: block;
  padding: 0 1.1vw;
  font-size: 16px;
  color: #fff;
  line-height: 2.4;
}

.sub_menu {
  position: absolute;
  z-index: 99;
  width: 150%;
  left: -25%;
  top: 50px;
  background: #fff;
  border-radius: 0px;
  padding: 0px 0;
  opacity: 0;
  visibility: hidden;
  -webkit-transform: translateY(20px);
  transform: translateY(20px);
  -webkit-transition: all 0.5s ease;
  transition: all 0.5s ease;
}

.sub_menu>li>a {
  display: block;
  text-align: center;
  font-size: 14px;
  color: #333;
  line-height: 1.5;
  padding: 0.5em;
}

.menu li:hover .sub_menu {
  visibility: visible;
  opacity: 1;
  top: 25px;
}

.sub_menu li:hover>a {
  background: #e9eaeb;
}

.menu>li:hover>a {
  color: #ccc;
}

.none {
  display: none;
}

.dh {
  color: #ffffff;
  line-height: 35px;
}


.dh {
  color: #fff;
  line-height: 35px;
}

.dh>p {
  margin-top: 5px;
  font-size: 40px;
  color: #fff;
}

.so {
  line-height: 35px;
  margin-left: 20px;
}

.so>img {
  max-width: 100%;
  cursor: pointer;
  vertical-align: middle;
}

#m_head {
  display: none !important;
}



@media (max-width:1420px) {
  .dh>p {
    font-size: 30px;
  }
}


@media (max-width:1220px) {
  .dh>p {
    font-size: 24px;
  }
}

@media (max-width:1120px) {
  .dh>p {
    font-size: 18px;
  }
}

@media (max-width: 991px) {
  #top_head {
    display: none !important;
  }

  #m_head {
    display: block !important;
  }
}

/* 移动端 */
#m_head {
  position: fixed;
  /* position: relative; */
  top: 0;
  z-index: 99999;
  left: 0;
  background: #151515;
  width: 100%;
  height: 60px;
}

#m_head .logo {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
  margin: auto;
  width: 70%;
  height: 30px;
  text-align: center;
}

#m_head .logo img {
  height: 25px;
}

#m_head .navbtn {
  position: absolute;
  z-index: 9;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  margin: auto 0 auto 27px;
  width: 30px;
  height: 20px;
}


#m_head .navbtn span,
#m_head .navbtn:before,
#m_head .navbtn:after {
  display: block;
  height: 2px;
  width: 100%;
  background: #fff;
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
}


#m_head .navbtn span {
  margin: 7px 0;
}

#m_head .navbtn:after,
#m_head .navbtn:before {
  content: '';
  -webkit-transform-origin: 7.5%;
  transform-origin: 7.5%;
}

#m_head .on_menu:before {
  -webkit-transform: rotate(45deg);
  transform: rotate(45deg);
}

#m_head .on_menu:after {
  -webkit-transform: rotate(-45deg);
  transform: rotate(-45deg);
}

#m_head .on_menu span {
  -webkit-transform: translateX(-100%);
  transform: translateX(-100%);
  opacity: 0;
}

#m_head .menu {
  display: none;
  margin-top: 0;
  position: absolute;
  z-index: 99999;
  top: 60px;
  left: 0;
  right: 0;
  height: calc(100vh - 60px);
  background: #151515;
  padding: 0 10%;
}

.mb_nav>li {
  border-bottom: 1px solid #2b2b2b;
  position: relative;
}

.mb_nav>li>a {
  display: block;
  line-height: 50px;
  font-size: 16px;
  color: #fff;
}

.menu_jt {
  position: absolute;
  width: 20%;
  height: 50px;
  line-height: 50px;
  right: 0;
  top: 0;
  text-align: center;
  z-index: 9;
}

.menu_jt .icon-font {
  display: block;
  width: 100%;
  height: 100%;
}

.menu_jt .icon-font:after {
  background-position: -30px -240px;
  top: calc(50% - 15px);
  background-image: url('../image/icon_spirit.png');
}

.clicked .icon-font:after {
  background-position: -30px -270px;
}

.mb_nav .mb_menu {
  display: none;
  background: #1E1E1E;
}

.mb_nav .mb_menu>li {
  border-top: 1px dashed #2b2b2b;
}

.mb_nav .mb_menu>li>a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 40px;
  text-indent: 2em;
}