header {
  width: 100%;
  height: 60px;
  background-color: rgba(0, 0, 0, 0.8);
  position: fixed;
  z-index: 999;
  top: 0;
}
.header-box {
  width: 1200px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
  font-size: 16px;
  color: #fff;
  margin: 0 auto;
}
.logo-img {
  width: 160px;
  height: 38px;
}
.nav {
  display: flex;
}
.nav li {
  width: 100px;
  height: 60px;
  line-height: 60px;
  text-align: center;
  position: relative;
}
.nav .active a {
  color: #ED6C00;
}
.nav .active::after {
  position: absolute;
  bottom: 0;
  width: 30px;
  height: 2px;
  background-color: #ED6C00;
  content: '';
  left: 50%;
  transform: translateX(-50%);
}
.banner {
  width: 100%;
}
.section {
  width: 1200px;
  position: relative;
  margin: 116px auto 0;
}
.section.first {
  margin-top: 0;
}
h3 {
  font-size: 24px;
  font-weight: bold;
  position: relative;
  display: inline-block;
  margin: 70px 0;
  width: 100%;
  text-align: center;
}
h3 .text1 {
  color: #9A9A9A;
}
h3 .text2 {
  color: #333333;
}
h3::after {
  position: absolute;
  content: '';
  width: 33px;
  height: 4px;
  left: 50%;
  bottom: -10px;
  transform: translateX(-50%);
  background-color: #ED6C00;
}
.mode-img {
  width: 584px;
  height: 533px;
  margin-right: 77px;
}
.mode-desc {
  flex: 1;
}
.mode-desc .order {
  font-size: 20px;
  margin-bottom: 8px;
}
.mode-content {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}
.mode-text {
  display: flex;
}
.mode-text .left {
  width: 140px;
  margin-right: 20px;
  font-size: 20px;
}
.mode-text .right {
  flex: 1;
  color: #8A8A8A;
  line-height: 19px;
}
.mode-text .right p {
  color: #8A8A8A;
  line-height: 22px;
  margin-bottom: 20px;
}
.mode-desc .mode-desc-item:not(:first-child) {
  margin-top: 50px;
}
.mode-img.mode-img-right {
  margin-right: 0;
  margin-left: 77px;
}

footer {
  background-color: #1A1A1A;
  padding: 68px 0;
  margin-top: 30px;
}
.footer-content {
  width: 1200px;
  margin: 0 auto;
  display: flex;
}
.footer-content ul {
  margin-right: 86px;
}
.footer-content ul li {
  color: #fff;
  font-size: 16px;
  margin-bottom: 40px;
}
.footer-content ul li a {
  color: #8A8A8A;
}
.app-box p {
  text-align: center;
  color: #fff;
  margin-top: 46px;
}
.app-img {
  width: 136px;
  height: 136px;
}

.footer-info {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 20px;
}
.footer-info .icon-gongan {
  width: 20px;
  height: 20px;
}
.footer-info .info1 {
  color: #fff;
  font-size: 14px;
  margin-left: 5px;
}
.footer-info .info2 {
  color: #fff;
  font-size: 14px;
  margin-left: 20px;
}