* {
  box-sizing: border-box;
}

html,
body {
  overflow-x: hidden;
}

a {
  text-decoration: none;
}

.header {
  position: fixed;
  width: 100%;
  height: 56px;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  z-index: 999;
}

.header.scrolled {
  background-color: #000;
}

.logo img {
  height: 35px;
}

.menu {
  display: flex;
  align-items: center;
  gap: 50px;
}

.menu a {
  color: #909599;
  font-weight: bold;
  font-size: 16px;
}

.menu a.active {
  color: #fff;
}

.bg-box {
  position: relative;
}

.bg-content {
  position: absolute;
  width: 1200px;
  top: 50%;
  left: 50%;
  transform: translateX(-50%) translateY(-50%);
}

.bg {
  width: calc(100% + 2px);
}

.c-title {
  text-align: center;
  margin-bottom: 40px;
}

.c-title h1 {
  font-size: 50px;
  margin: 0 0 30px 0;
}

.c-title span {
  display: block;
  width: 90px;
  height: 2px;
  margin: auto;
}




.banner {
  text-align: center;
  color: #fff;
  font-weight: bold;
}

.banner p {
  font-size: 20px;
}

.banner h1 {
  font-size: 86px;
  line-height: 90px;
  margin: 0;
}

.business-group {
  width: 1200px;
  margin: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 37px;
  text-align: center;
}

.business-group img {
  width: 375px;
}

.business-group p {
  font-size: 17px;
  margin-top: 15px;
}

.business2 {
  position: relative;
  background-color: #000;
  z-index: 3;
}

.business2 .bg-content {
  width: 1200px;
  margin: auto;
}

.b-a {
  display: flex;
  height: 340px;
}

.b-a-1 {
  width: 600px;
  max-width: 600px;
  min-width: 600px;
  color: #fff;
  padding: 55px 65px;
  background-image: url('../img/imgb1.png');
}

.b-a-1 h1 {
  font-size: 29px;
  font-weight: 500;
  margin: 0;
}

.b-a-1 p {
  font-size: 20px;
  line-height: 1.6;
}

.b-a-1 div {
  width: 90px;
  height: 2px;
  margin: 30px 0;
  background-color: #fff;
}

.b-a-2 {
  width: 600px;
  max-width: 600px;
  min-width: 600px;
  background-image: url('../img/imgb2.png');
}

.b-b {
  display: flex;
  gap: 67px;
}

.b-b-i {
  color: #fff;
  margin-top: 70px;
}

.b-b-i h1 {
  font-size: 29px;
  font-weight: 500;
  margin: 0;
}

.b-b-i span {
  display: block;
  width: 90px;
  height: 2px;
  margin: 30px 0 40px 0;
}

.b-b-i img {
  width: 250px;
}

.b-b-i p {
  width: 250px;
  font-size: 17px;
  line-height: 1.6;
  margin: 40px 0 0;
}

.partners {
  padding: 200px 0;
  margin: -200px 0;
  background-image: url('../img/bg3.png');
  z-index: 1;
}

.p-c {
  width: 1200px;
  margin: auto;
  display: flex;
  flex-wrap: wrap;
}

.p-c img {
  width: 400px;
}

.advantage {
  position: relative;
  padding-top: 200px;
  z-index: 3;
  background-image: url(../img/bg5.png);
  background-repeat: no-repeat;
}

.advantage img {
  width: 100%;
}

.adc {
  background-color: #000;
}

.ad-c {
  color: #fff;
  width: 1200px;
  margin: auto;
}

.ad-dd {
  position: absolute;
  width: 1200px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  color: #fff;
  gap: 30px;
  left: 50%;
  transform: translateX(-50%);
  bottom: 50px;
}

.ad-dd h1 {
  font-size: 78px;
  margin: 0;
}

.ad-dd h1 small {
  font-size: 40px;
}

.ad-dd p {
  width: 250px;
  font-size: 22px;
}

.contactus {
  color: #fff;
  background-color: #000;
}

.co-g {
  display: flex;
  width: 1200px;
  margin: auto;
  padding-bottom: 70px;
}

.co-g-i {
  flex: 1;
  text-align: center;
}

.co-g-i img {
  height: 65px;
}

.co-g-i p {
  font-size: 20px;
}

.co-g-i div {
  width: 40px;
  height: 2px;
  background-color: #fff;
  margin: 10px auto;
}

.co-g-i b {
  font-size: 24px;
}

.f {
  color: #fff;
  text-align: center;
  padding: 20px;
  background-color: #121416;
}