.center {
  width: 1200px;
  margin: 0 auto;
}

div {
  box-sizing: border-box;
}

.banner_bg {
  background-color: transparent;
  height: 650px;
  background: url("../images/SSL/banner.png") no-repeat;
  background-size: cover;
}
.banner_bg .nav-active {
  background: rgba(255, 255, 255, 0.8);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  box-shadow: 0 3px 4px rgba(0, 0, 0, 0.1);
  z-index: 100;
}
.banner_bg .nav_wapper {
  height: 60px;
  align-items: center;
  position: fixed;
  top: 0;
  width: 100%;
}
.banner_bg .nav_wapper .wapper {
  display: flex;
  align-items: center;
  width: 1200px;
}
.banner_bg .nav_wapper .logo {
  background: url("../images/logo_scroll.png") no-repeat;
  background-size: 100% 100%;
  width: 110px;
  height: 40px;
  margin-right: 220px;
  margin-bottom: 8px;
}
.banner_bg .nav_wapper .nav_list {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
  padding-left: 260px;
}
.banner_bg .nav_wapper .nav_list .item {
  font-size: 16px;
  color: #000;
}
.banner_bg .nav_wapper .nav_list .item:hover {
  color: #2173fd;
}
.banner_bg .nav_wapper .nav_list .itemAc {
  color: #2173fd;
  font-weight: bold;
}
.banner_bg .nav-active {
  background: rgba(255, 255, 255, 0.8);
  -webkit-backdrop-filter: blur(20px);
          backdrop-filter: blur(20px);
  box-shadow: 0 3px 4px rgba(0, 0, 0, 0.1);
  z-index: 100;
}

.common_title {
  font-size: 24px;
  color: #222222;
  line-height: 24px;
  font-weight: bold;
  text-align: center;
}

.box1 {
  padding-top: 210px;
}
.box1 .text1 {
  font-size: 40px;
  font-weight: bold;
  color: #000;
}
.box1 .text2 {
  font-size: 14px;
  color: #333333;
  line-height: 24px;
  width: 510px;
  margin-top: 30px;
}

.box2 {
  background: #fff;
  padding-top: 88px;
  padding-bottom: 76px;
}
.box2 .list {
  margin-top: 60px;
  display: flex;
  justify-content: space-between;
}
.box2 .list .item {
  width: 220px;
  position: relative;
  padding-top: 114px;
}
.box2 .list .item .icon {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  margin: 0 auto;
  width: 148px;
  height: 77px;
}
.box2 .list .item .icon.size2 {
  height: 81px;
  top: -3px;
}
.box2 .list .item .icon.size3 {
  top: 2px;
}
.box2 .list .item .icon.size4 {
  height: 79px;
}
.box2 .list .item .text1 {
  font-size: 18px;
  color: #222222;
  line-height: 24px;
  font-weight: bold;
  text-align: center;
  margin-bottom: 18px;
}
.box2 .list .item .text2 {
  font-weight: 400;
  font-size: 12px;
  color: #666666;
  line-height: 22px;
  text-align: center;
}

.box3 {
  background: #fcfcfc;
  padding-top: 59px;
  padding-bottom: 32px;
}
.box3 .list {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-top: 70px;
}
.box3 .list .item {
  width: 387px;
  height: 240px;
  background: #ffffff;
  box-shadow: 0px 3px 7px 0px rgba(197, 197, 197, 0.33);
  border-radius: 10px;
  position: relative;
  padding: 97px 32px 0 24px;
  margin-bottom: 25px;
  cursor: pointer;
}
.box3 .list .item:hover {
  transition: transform 0.2s;
  transform: scale(1.03);
  transform-origin: center;
}
.box3 .list .item .icon {
  position: absolute;
  top: 0px;
  width: 46px;
  height: 40px;
  top: 37px;
}
.box3 .list .item .icon.size2 {
  width: 54px;
  height: 54px;
  top: 27px;
}
.box3 .list .item .icon.size3 {
  width: 44px;
  height: 40px;
  top: 36px;
}
.box3 .list .item .icon.size4 {
  width: 46px;
  height: 44px;
  top: 38px;
}
.box3 .list .item .icon.size5 {
  width: 48px;
  height: 35px;
  top: 40px;
}
.box3 .list .item .icon.size6 {
  width: 54px;
  height: 53px;
  top: 28px;
}
.box3 .list .item .text1 {
  font-size: 18px;
  color: #181818;
  line-height: 24px;
  margin-bottom: 16px;
}
.box3 .list .item .text2 {
  font-size: 14px;
  color: #596173;
  line-height: 24px;
}

.box4 {
  background: #f9f9f9;
  padding-top: 58px;
  padding-bottom: 50px;
}
.box4 .tab_wrapper {
  margin-top: 58px;
  display: flex;
  align-items: center;
  background: #ffffff;
  box-shadow: 0px 3px 7px 0px rgba(197, 197, 197, 0.33);
  border-radius: 4px;
  height: 80px;
}
.box4 .tab_wrapper .tab_item {
  flex: 1;
  text-align: center;
  font-size: 20px;
  color: #222222;
  cursor: pointer;
  height: 100%;
  line-height: 80px;
}
.box4 .tab_wrapper .tab_item:hover {
  color: #557dff;
}
.box4 .tab_wrapper .tab_item_ac {
  color: #557dff !important;
  position: relative;
}
.box4 .tab_wrapper .tab_item_ac::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background: #557dff;
  height: 4px;
  border-radius: 2px;
  animation-name: tab_animate;
  animation-fill-mode: both;
  animation-duration: 1s;
}
.box4 .tab_content {
  padding: 25px;
  margin-top: 25px;
  background: #fff;
  display: flex;
  box-shadow: 0px 3px 7px 0px rgba(197, 197, 197, 0.33);
}
.box4 .tab_content .img {
  width: 554px;
  height: 302px;
  margin-right: 35px;
}
.box4 .tab_content .text {
  padding-top: 16px;
}
.box4 .tab_content .text .text_item {
  margin-bottom: 72px;
}
.box4 .tab_content .text .text_item .text1 {
  font-size: 18px;
  color: #222222;
  margin-bottom: 20px;
  font-weight: bold;
}
.box4 .tab_content .text .text_item .text2 {
  font-size: 16px;
  color: #666666;
  position: relative;
  line-height: 28px;
}
.box4 .tab_content .text .text_item .text2::after {
  content: "";
  position: absolute;
  bottom: -19px;
  left: 0;
  width: 557px;
  height: 1px;
  background: #eeeeee;
  opacity: 0.54;
}
@keyframes tab_animate {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
.box5 {
  width: 100%;
  height: 174px;
  background: url("../images/SSL/box5_bg.jpg") 100% 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.box5 .text {
  font-family: Alimama ShuHeiTi;
  font-weight: bold;
  font-size: 29px;
  color: #ffffff;
  line-height: 28px;
}
.box5 .btn {
  margin-top: 26px;
  width: 230px;
  height: 46px;
  line-height: 46px;
  text-align: center;
  background: #f7f9fb;
  border-radius: 23px;
  font-size: 16px;
  color: #376aff;
  cursor: pointer;
  box-shadow: 0px 4px 0px 0px rgba(255, 255, 255, 0.35);
}

.animate-element {
  opacity: 0;
}

.animated {
  animation-duration: 0.5s;
}

.fly-up {
  animation-name: fly-up;
  animation-fill-mode: both;
  animation-duration: 0.5s;
}
@keyframes fly-up {
  0% {
    -webkit-transform: translateY(100px);
    opacity: 0;
  }
  100% {
    -webkit-transform: translateY(0);
    opacity: 1;
  }
}