nav {
  position: absolute;
}

.banner {
  position: relative;
  z-index: 9;
  top: 0;
  overflow: hidden;
  width: 100%;
  height: 670px;
  background: url() no-repeat center;
  background-size: cover;
}

.banner::after {
  position: absolute;
  bottom: -155px;
  left: 0;
  display: block;
  width: 100%;
  height: 340px;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/common/banner-mask.png') no-repeat center;
  content: '';
}

.banner-section {
  padding: 0;
}

.banner-introduce {
  margin-top: 182px;
}

.banner-title img {
  width: 415px;
}

.banner-desc {
  margin-top: 30px;
  color: #5f5f5f;
  font-size: 19px;
  font-weight: 300;
  letter-spacing: 1px;
  line-height: 32px;
}

.intro-features {
  position: relative;
  z-index: 10;
  display: flex;
  width: 1160px;
  align-items: center;
  justify-content: space-around;
  margin: -130px auto 60px;
}

.intro-item {
  position: relative;
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.intro-item::after {
  position: absolute;
  top: 15px;
  right: 0;
  width: 1px;
  height: 68px;
  background-color: #979797;
  content: '';
}

.intro-item:last-child::after {
  display: none;
}

.intro-item img {
  height: 40px;
}

.intro-item p {
  margin-top: 10px;
  color: #5f5f5f;
  font-size: 19px;
  font-weight: 300;
  letter-spacing: 1px;
  line-height: 32px;
}

/* menu */
.section-menu {
  width: 100%;
  height: 60px;
  background: #ffffff9e;
  box-shadow: 0 10px 20px 0 #0000000a;
  line-height: 60px;
}

.section-menu-fixed {
  position: fixed;
  z-index: 99;
  top: 0;
  left: 0;
  width: 100%;
  background: #fff;
}

.section-menu .section-menu-ul {
  position: relative;
  display: flex;
  width: 1160px;
  margin: 0 auto;
}

.section-menu .section-menu-ul .section-menu-li {
  position: relative;
  z-index: 10;
  width: 580px;
  color: #333;
  cursor: pointer;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0;
  text-align: center;
}

.section-menu .section-menu-ul .section-menu-li-active {
  color: #fff;
}

.section-menu .section-menu-ul .menu-li-mask {
  position: absolute;
  z-index: 9;
  left: 308;
  width: 580px;
  height: 60px;
  background:
    linear-gradient(175deg, #9cd7ff 10%, #7ecbff00 100%),
    linear-gradient(214deg, #afe7ff 0%, #7ab1fd 38%, #3fa0fa 81%);
}

/* main内容 */

.main-section-1 {
  width: 1160px;
  padding-top: 120px;
  margin: 0 auto;
  text-align: center;
}

.section-title {
  margin-bottom: 8px;
  color: #333;
  font-size: 34px;
  font-weight: 600;
  text-align: center;
}

.section-desc {
  color: #666;
  font-size: 15px;
  font-weight: 300;
  letter-spacing: 2px;
  line-height: 29px;
  text-align: center;
}

.main-section-1 .section-box {
  width: 1160px;
  margin: 60px auto 124px;
}

.main-section-1 .section-box img {
  width: 100%;
}

.main-section-2 {
  width: 100%;
  padding: 133px 0 112px;
  margin: 0 auto;
  background-image: radial-gradient(circle at 51% 57%, #fff0 0%, #dbe7ff0f 36%, #0056ff4f 94%);
  text-align: center;
}

.carousel-container {
  width: 1160px;
  margin: 67px auto 0;
}

/* 顶部导航 */
.carousel-nav {
  position: relative;
  display: flex;
  align-items: flex-end;
  padding-bottom: 28px;
  margin-bottom: 60px;
}

/* 灰色底线 */
.nav-track {
  position: absolute;
  z-index: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: #e0e0e0;
}

/* 蓝色进度条 */
.active-line {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 76px;
  height: 2px;
  background-color: #0276ff;
  transition: transform 0.6s ease;
}

/* 导航项 */
.nav-item {
  position: relative;
  z-index: 3;
  flex: 1;
  padding: 0 20px;
  cursor: pointer;
  opacity: 0.9;
  text-align: center;
  transition: opacity 0.25s;
}

.nav-item:hover,
.nav-item.active {
  opacity: 1;
}

.nav-title {
  margin-bottom: 15px;
  color: #333;
  font-size: 21px;
  font-weight: 600;
  transition: color 0.3s;
}

.nav-item.active .nav-title {
  color: #007bff;
}

.nav-desc {
  max-width: 276px;
  margin: 0 auto;
  color: #5f5f5f;
  font-size: 13px;
  letter-spacing: 0;
  line-height: 23px;
  text-align: center;
}

/* --- 底部内容 --- */
.carousel-viewport {
  overflow: hidden;
  width: 100%;
  height: 402px;
}

.carousel-track {
  display: flex;
  width: 300%; /* 3 slides */
  transition: transform 0.6s ease;
}

.carousel-slide {
  position: relative;
  display: flex;
  width: 33.3333%;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

/* --- 通用淡入 --- */
.fade-in {
  opacity: 1 !important;
}

/* --- 箭头滑入动画 --- */
.arrow-enter {
  opacity: 1 !important;
  transform: translateX(0) !important;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-arrow {
  opacity: 0;
  transform: translateX(-20px);
}

/* 主图初始隐藏 */
.slide-img {
  opacity: 0;
  transition: opacity 0.6s ease;
  will-change: opacity;
}

.slide1-wrap .slide1-img {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  width: 1160px;
}

.slide1-arrow1 {
  position: absolute;
  z-index: 2;
  top: 100px;
  left: 520px;
  width: 58px;
}

.slide1-arrow2 {
  position: absolute;
  z-index: 2;
  top: 100px;
  left: 882px;
  width: 58px;
}

.slide2-wrap .slide2-img {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 50%;
  width: 952px;
  transform: translateX(-50%);
}

.slide2-arrow1 {
  position: absolute;
  z-index: 2;
  top: 100px;
  left: 490px;
  width: 58px;
}

.slide3-wrap .slide3-img {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 50%;
  width: 1152px;
  transform: translateX(-50%);
}

.slide3-arrow1 {
  position: absolute;
  z-index: 2;
  top: 100px;
  left: 650px;
  width: 58px;
}

.main-section-3 {
  width: 1160px;
  margin: 125px auto 180px;
}

.main-section-3 .section-ul {
  position: relative;
}

.main-section-3 .section-ul li {
  position: relative;
  z-index: 1;
  display: flex;
  width: 626px;
  height: 196px;
  box-sizing: border-box;
  padding: 18px 30px;
  margin-bottom: 16px;
  background-image: linear-gradient(216deg, #ebf9fd 1%, #f6fbff33 97%);
  border-radius: 8px;
  box-shadow: 0 10px 19px 0 #0000000a;
  cursor: pointer;
}

.main-section-3 .section-ul .section-li-active {
  background-image: none;
}

.main-section-3 .section-ul .move-animate-bg {
  position: absolute;
  z-index: 0;
  border-radius: 8px;
}

.main-section-3 .section-ul .move-animate-bg-2 {
  position: absolute;
  top: 0;
  left: 0;
  width: 626px;
  height: 196px;
  background-image: linear-gradient(-76deg, #86bdfe 14%, #f6fbff33 100%);
}

.main-section-3 .section-guide {
  position: relative;
  display: flex;
  margin-top: 80px;
}

.main-section-3 .section-li-icon {
  width: 38px;
  height: 38px;
  margin: 9px 12px auto 12px;
}

.main-section-3 .section-li-title {
  margin-top: 5px;
  color: #333;
  font-size: 21px;
  font-weight: 600;
}

.main-section-3 .guide-li-desc {
  width: 310px;
  margin-top: 15px;
  color: #5f5f5f;
  font-size: 13px;
  letter-spacing: 0;
  line-height: 23px;
}

.main-section-3 .guide-li-desc2 {
  margin-top: 15px;
  color: #80829d;
  font-size: 11px;
  letter-spacing: 0;
  line-height: 23px;
}

.main-section-3 .guide-right {
  z-index: 10;
}

.main-section-3 .guide-right > img {
  position: absolute;
  right: 0;
  bottom: -14px;
  width: 753px;
  opacity: 0;
}

.main-section-3 .guide-right > img.img-active {
  opacity: 1;
}

.main-section-4 {
  width: 1160px;
  margin: 0 auto 118px;
}

.main-section-4 .section-title {
  text-align: left;
}

.main-section-4 .section-box img {
  width: 100%;
  margin-top: 60px;
}

.main-section-5 {
  position: relative;
  width: 100%;
  height: 852px;
  box-sizing: border-box;
  padding-top: 112px;
  background-image: radial-gradient(circle at 51% 57%, #fff0 0%, #dbe7ff0f 36%, #0056ff4f 94%);
}

/* 中间渐变背景 - 使用伪元素 */
.main-section-5::before {
  position: absolute;
  z-index: 1;
  top: 220px;
  left: 10%;
  width: 738px;
  height: 603px;
  background-image: linear-gradient(180deg, #05aeff00 0%, #0250ff 61%, #0276ff00 81%);
  content: '';
  filter: blur(48px);
  opacity: 0.16;
  pointer-events: none;
}

/* 右侧渐变背景 - 使用伪元素 */
.main-section-5::after {
  position: absolute;
  z-index: 3;
  top: 305px;
  right: 10%;
  width: 511px;
  height: 396px;
  background-image: linear-gradient(180deg, #05aeff00 0%, #02d0ff 61%, #0276ff00 81%);
  content: '';
  filter: blur(48px);
  opacity: 0.16;
  pointer-events: none;
}

/* 主容器：使用 Flexbox 实现左右并排 */
.main-section-5 .section-box {
  position: relative;
  display: flex;
  width: 1160px;
  margin: 100px auto 0;
}

/* --- 左侧: 传统开发模式 --- */
.main-section-5 .traditional-mode {
  position: relative;
  z-index: 2;
  width: 728px;
  height: 374px;
  flex-shrink: 0;
  border: 2px solid #fff;
  background-image: linear-gradient(46deg, #fdffff 0%, #cce3ff 100%);
  border-radius: 8px;
}

.main-section-5 .title {
  position: absolute;
  top: 74px;
  left: 51px;
  color: #333;
  font-size: 27px;
  font-weight: 600;
}

.old-time {
  position: absolute;
  top: 55px;
  left: 230px;
  height: 52px;
}

.step {
  position: absolute;
  top: 55px;
  left: 230px;
  height: 52px;
}

/* 左侧步骤布局 */

.steps-grid .step-item {
  position: absolute;
  display: flex;
  width: 256px;
  height: 57px;
  box-sizing: border-box;
  align-items: center;
  padding: 0 20px;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/technical-tools/step-item-bg.png') no-repeat center center;
  background-size: contain;
  border-radius: 29px;
}

.step-icon {
  height: 30px;
  margin-right: 8px;
}

.step-item-1 {
  top: 150px;
  left: 37px;
}

.step-item-2 {
  top: 150px;
  left: 257px;
}

.step-item-3 {
  top: 150px;
  left: 453px;
}

.step-item-4 {
  top: 238px;
  left: 37px;
}

.step-item-5 {
  top: 238px;
  left: 257px;
}

/* --- 右侧: 斗拱全新模式 --- */
.main-section-5 .new-mode {
  position: relative;
  z-index: 4;
  top: -48px;
  left: -50px;
  width: 498px;
  height: 378px;
  flex-shrink: 0;
  background-image: linear-gradient(-53deg, #effcff 0%, #def9fd 100%);
}

.new-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #333;
  font-size: 27px;
  font-weight: 600;
}

/* 右侧步骤样式 */
.steps-list {
  position: absolute;
  top: 163px;
  left: 114px;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.right-step {
  display: flex;
  width: 256px;
  height: 57px;
  box-sizing: border-box;
  align-items: center;
  justify-content: flex-start;
  padding-left: 20px;
  background: url('https://cloudpnrcdn.oss-cn-shanghai.aliyuncs.com/hfwebsite/new-public/images/technical-tools/step-item-bg.png') no-repeat center center;
  background-size: contain;
  color: #0056ff;
  font-size: 21px;
  font-weight: 500;
}

.right-step .step-title {
  height: 23px;
}

.text-gradient-blue {
  display: inline-block;
  background: linear-gradient(180deg, #0056ff 0%, #4bcaf0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.free-service {
  margin-top: -62px;
}