html,body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
  color: #647D89;
}
div,p,h1,h2,h3,h4,ul{
  margin: 0;
  padding: 0;
}
a {
  text-decoration: none;
  color: rgba(255,255,255,0.8);
}
ul{
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
ul>li {
  margin-left: 20px;
  font-size: 15px;
}
.w {
  width: 1240px;
  margin: 0 auto;
}
* {
  box-sizing: border-box;
}
header {
  background-color: black;
  width: 100%;
  min-width: 1240px;
  position: fixed;
  z-index: 1000;
}
.header_content {
  display: flex;
  justify-content: space-between;
}
.logo {
  height: 65px;
}
section {
  width: 100%;
  min-width: 1240px;
}
.home_section {
  padding: 260px 0;
  background-image: url(../imgs/Group_3.png);
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}
.home_title {
  padding-left: 115px;
  box-sizing: border-box;
}
.home_title_1 {
  font-size: 44px;
  line-height: 53px;
  font-weight: bold;
  color: #ffffff;
  margin-bottom: 10px;
}
.home_title_2 {
  font-size: 34px;
  line-height: 41px;
  color: #ffffff;
  margin-bottom: 10px;
}
#about_us {
  background-color: #0C171F;
}
#about_us>div {
  padding: 150px;
  box-sizing: border-box;
}
.introdcustion {
  font-size: 17px;
  color: #9EC7D9;
}
.introdcustion>p {
  line-height: 26px;
  margin-bottom: 30px;
}
.about_us_title {
  font-size: 40px;
  line-height: 53px;
  color: #FFFFFF;
  text-align: center;
  margin-bottom: 30px;
}
#solution {
  background-color: #0C171F;
  padding-top: 70px;
  padding-bottom: 100px;
  box-sizing: border-box;
}
.solution_title {
  font-size: 44px;
  font-weight: bold;
  color: #FFFFFF;
  text-align: center;
  margin-bottom: 20px;
}
.solution_line {
  width: 100%;
  min-width: 1240px;
  text-align: center;
  background-color: #2C363F;
  padding: 10px 0;
  box-sizing: border-box;
}
.solution_box {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.solution_box>div {
  width: 25%;
  height: 28.1vw;
  color: #FFFFFF;
  padding: 100px 10px 20px 10px;
}
.solution_box_1 {
  background-image: url(../imgs/e_1.png);
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}
.solution_box_2 {
  background-image: url(../imgs/e_2.png);
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}
.solution_box_3 {
  background-image: url(../imgs/e_4.png);
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}
.solution_box_4 {
  background-image: url(../imgs/e_3.png);
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}
.solution_box>div>p:first-child {
  font-size: 40px;
  font-weight: bold;
}
.solution_box>div>p:nth-child(2) {
  font-size: 30px;
  margin-top: 50px;
}
.solution_txt {
  width: 270px;
}
.solution_tag {
  width: 40px;
  height: 40px;
  display: block;
}
.m_r_15 {
  margin-right: 15px;
}
.m_l_15 {
  margin-left: 15px;
}
#solution>.solution_1 {
  /* background-color: #101C26; */
  padding-top: 100px;
  box-sizing: border-box;
}
.solution_do {
  display: flex;
  justify-content: center;
}
.d_flex {
  display: flex;
}
.font_r {
  text-align: right;
}
.font_l {
  text-align: left;
}
.solutin_do_title {
  font-size: 19px;
  color: #DCEAF3;
  margin-bottom: 10px;
}
.solution_do_des {
  font-size: 16px;
  line-height: 26px;
  color: #9EC7D9;
}
.solution_do_c {
  margin: 0 15px;
}
.solution_do_b {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 50px 0 30px 0;
}
#contact_us{
  background-image: url(../imgs/Mask_group.png);
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  position: relative;
  height: 700px;
}
.mask {
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: rgba(8, 8, 8, 0.3);
  z-index: 2;
}
.contact_us_content {
  padding-top: 140px;
  box-sizing: border-box;
  z-index: 10;
}
.contact_us_title {
  text-align: center;
  font-size: 51px;
  font-weight: bold;
  color: #FFFFFF;
  margin-bottom: 20px;
}
.contact_us_desc {
  text-align: center;
  font-size: 17px;
  color: #FFFFFF;
}
.contact_info {
  background-color: rgba(255, 255, 255, 0.07);
  padding: 14px 20px 34px;
  margin: 0 auto;
  margin-top: 50px;
  width: 40%;
}
.contact_info>div {
  display: flex;
  align-items: center;
  color: #FFFFFF;
}
footer {
  width: 100%;
  min-width: 1240px;
  background-color: #0C161E;
}
footer>p {
  text-align: center;
  height: 126px;
  line-height: 126px;
  font-size: 15px;
  font-weight: bold;
  color: #697982;
}