html,
body {
  font-family: sans-serif, Arial, Helvetica;
}
ul {
  padding: 0;
  margin: 0;
}
ul,
li {
  list-style: none;
}
a {
  text-decoration: none;
}
.display_none {
  display: none;
}
.flex_center {
  display: flex;
  align-items: center;
  justify-content: center;
}
.flex_between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.container {
  width: 100%;
  height: 100%;
  background-color: #f0f0f0;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.main {
  width: 100%;
  max-width: 1440px;
  background-color: #fff;
  overflow: hidden;
}
.header {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header_main {
  box-sizing: border-box;
  width: 1440px;
  padding: 0 7% 0 10%;
  height: 60px;
  background-color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  width: 126px;
  height: 25px;
}
.logo img {
  width: 100%;
  height: auto;
}
.nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav ul li {
  margin-left: 20px;
  line-height: 18px;
}
.nav ul li a {
  font-size: 12px;
  color: rgba(51, 51, 51, 1);
  cursor: pointer;
}
.nav ul li a:hover {
  color: rgba(60, 80, 255, 1);
}
.nav ul li.active {
  position: relative;
}
.nav ul li.active a {
  color: rgba(60, 80, 255, 1);
  font-weight: 700;
}
.nav ul li.active::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 20%;
  width: 60%;
  height: 3px;
  background-color: rgba(60, 80, 255, 1);
  border-radius: 3px;
}
.nav ul li.btn_contact {
  width: 69px;
  height: 24px;
  border-radius: 75px;
  background: rgba(60, 80, 255, 1);
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav ul li.btn_contact a {
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}
.footer {
  position: relative;
}
.footer_main {
  width: 100%;
  height: 470px;
  background-color: rgba(51, 51, 51, 1);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer_main .footer_left,
.footer_main .footer_right {
  width: calc(500 / 1440 * 100vw);
  max-width: 500px;
  height: 100%;
}
.footer_main .footer_left {
  position: relative;
}
.footer_main .footer_left .footer_logo {
  width: calc(180 / 1440 * 100vw);
  max-width: 180px;
  width: clamp(100px, calc(180 / 1440 * 100vw), 180px);
  margin-top: -200px;
}
.footer_main .footer_left::after {
  content: "";
  position: absolute;
  bottom: 110px;
  right: 0;
  width: 1px;
  height: 250px;
  background-color: rgba(102, 102, 102, 1);
}
.footer_main .footer_right {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.footer_main .footer_right::after {
  content: "";
  position: absolute;
  bottom: 110px;
  left: 0;
  width: 1px;
  height: 250px;
  background-color: rgba(102, 102, 102, 1);
}
.footer_main .footer_right .contact_us {
  color: rgba(153, 153, 153, 1);
  font-size: 16px;
}
.footer_main .footer_right .contact_us .contact_us_title {
  margin-bottom: 20px;
  color: #fff;
  font-size: 18px;
}
.footer_main .footer_right .contact_us .contact_us_content {
  display: flex;
  flex-direction: column;
}
.footer_main .footer_right .contact_us .contact_us_content .contact_us_content_item {
  margin-bottom: 14px;
}
.footer_main .footer_right .contact_us .qrcode {
  margin-top: 6px;
}
.footer_main .footer_right .contact_us .qrcode .qrcode_img {
  width: 105px;
  height: 105px;
}
.footer_main .footer_right .contact_us .qrcode .qrcode_text {
  margin-top: 6px;
  color: rgba(153, 153, 153, 1);
  font-size: 12px;
  width: 105px;
  text-align: center;
}
.footer_main .footer_middle {
  margin-top: -60px;
  flex: 1;
  display: flex;
  justify-content: center;
}
.footer_main .footer_middle ul {
  display: flex;
  flex-direction: column;
  /* align-items: center; */
  justify-content: center;
}
.footer_main .footer_middle ul li a {
  color: rgba(153, 153, 153, 1);
  font-size: 16px;
  line-height: 40px;
}
.footer_main .footer_middle ul li a:hover {
  color: rgba(255, 255, 255, 1);
}
.footer_main .footer_middle ul li a.active {
  color: rgba(255, 255, 255, 1);
  font-size: 18px;
}
.copy_right {
  height: 38px;
  line-height: 38px;
  color: #fff;
  font-size: 15px;
  text-align: center;
  background: rgba(35, 46, 209, 1);
}
.about_us_popup {
  display: none;
  position: absolute;
  top: 30px;
  bottom: 30px;
  right: 30px;
  width: calc(627 / 1440 * 100vw);
  max-width: 627px;
  width: clamp(300px, calc(627 / 1440 * 100vw), 627px);
  height: 409px;
}
.about_us_popup img {
  width: 100%;
  height: auto;
}
.btn_use {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    90deg,
    rgba(68, 88, 244, 1) 0%,
    rgba(90, 142, 253, 1) 100%
  );
  border-radius: 27.5px;
  color: #fff;
  font-size: calc(20 / 1440 * 100vw);
  font-size: clamp(12px, calc(20 / 1440 * 100vw), 20px);
  text-decoration: none;
  cursor: pointer;
}
.btn_use_large {
  width: calc(199 / 1440 * 100vw);
  height: calc(55 / 1440 * 100vw);
  max-width: 199px;
  max-height: 55px;
}
.btn_use_normal {
  width: calc(163 / 1440 * 100vw);
  height: calc(47 / 1440 * 100vw);
  max-width: 163px;
  max-height: 47px;
}