html, body {
    background: #f4f8fd;
}

/* 横幅样式 */
.banner-imgs-warp {
  margin-top: 86px;
  position: relative;
  width: 100%;
  height: calc(100vw / 4.085);
  overflow: hidden;
}
.banner-imgs-warp img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.banner-text {
  position: absolute;
  left: 16%;
  width: 35.94%;
  height: 9.57%;
  top: 142px;
  transform: none;
  transition: 1s;
}

.banner-text span {
  font-size: 2.5vw; /* 响应式字体大小，基于视窗宽度 */
  font-family: SourceHanSansSC-Light;
  font-weight: 500;
  color: #F2F2F2;
  text-align: left;
  display: flex;
  align-items: center;
  width: 100%;
  height: 100%;
  line-height: 1.2;
  letter-spacing: 0;
}

/* 产品导航 */
.product-nav {
  display: flex;
  justify-content: center;
  background: #2176ff;
  padding: 0;
  margin: 0;
}
.product-nav a {
  color: #fff;
  padding: 18px 36px;
  font-size: 1.1rem;
  text-decoration: none;
  transition: background 0.2s;
  display: inline-block;
}
.product-nav a:hover {
  background: #185bb5;
}

/* 产品模块列表 */
.product-list {
  max-width: 1200px;
  margin: 40px auto 60px auto;
  display: flex;
  flex-direction: column;
  gap: 48px;
}
.product-module {
  display: flex;
  align-items: center;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  padding: 36px 32px;
  gap: 48px;
}
.product-module:nth-child(even) {
  flex-direction: row-reverse;
}
.product-info {
  flex: 1 1 0;
}
.product-title {
  font-size: 2rem;
  color: #2176ff;
  margin-bottom: 18px;
  font-weight: 600;
}
.product-desc {
  font-size: 1.1rem;
  color: #444;
  line-height: 1.8;
}
.product-img {
  flex: 0 0 340px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-img img {
  max-width: 320px;
  max-height: 220px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(33,118,255,0.08);
  background: #f6f8fa;
}

@media (max-width: 900px) {
  .product-module {
    flex-direction: column !important;
    gap: 24px;
    padding: 24px 10px;
  }
  .product-img {
    flex: none;
  }
  .product-img img {
    max-width: 90vw;
    max-height: 180px;
  }
}

@media (max-width: 600px) {
  .banner-imgs-warp {
    height: 160px;
  }
  .banner-text span {
    font-size: 1.2rem;
  }
  .product-title {
    font-size: 1.2rem;
  }
  .product-desc {
    font-size: 0.95rem;
  }
  .product-list {
    gap: 24px;
  }
} 

.b1 {
    position: sticky;
    top: 80px;
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 75px;
    background: url('/static/imgs/zndwzd/back2.png') center center repeat-x, #0455da;
    margin-top: -1px; /* 向上移动1px覆盖可能的白线 */
    padding-top: 0;
}
.b1-inner {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
}
.b1 a {
  width: 260px;
  min-width: 260px;
  max-width: 260px;
  text-align: center;
  font-size: 24px;
  font-family: SourceHanSansCN, sans-serif;
  font-weight: 400;
  color: #fff;
  height: 100%;
  line-height: 75px;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
  background: transparent;
  position: relative;
  z-index: 1;
  display: block;
}
.b1 a.active, .b1 a:hover {
  background: #3677e1;
  color: #fff;
} 

.banner-quicknav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 37px;
  margin-top: 52px;
  flex-wrap: nowrap;
  white-space: nowrap;
  overflow-x: hidden;
  scrollbar-width: none; /* Firefox */
}
.banner-quicknav::-webkit-scrollbar {
  display: none; /* Chrome/Safari/Edge */
}
.banner-quicknav span {
  font-family: SourceHanSansSC-Normal, sans-serif;
  font-size: 27.14px;
  color: #fff;
  letter-spacing: 0;
  font-weight: 400;
} 

.section-block {
    max-width: 1500px;
    margin: -60px auto 0 auto;
}
/* 1. 大标题样式 */
/* 默认大标题黑色，分隔线灰色 */
.section-title {
    
    color: #222;
    font-family: 'SourceHanSansSC-Normal', 'Source Han Sans SC', 'Microsoft YaHei', Arial, sans-serif;
    font-size: 36px;
    font-weight: normal;
    margin-top: 152px;
    margin-bottom: 0;
    line-height: 1.2;
}

/* 2. 大标题和副标题之间蓝色分隔线 */
/* 让分隔线宽度与大标题文本等宽 */
.section-title-wrap {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: fit-content;
}
.section-title {
    display: block;
    position: relative;
}
.section-divider {
    width: 100%;
    height: 2px;
    background: #222;
    border-radius: 2px;
    margin: 24px 0 24px 0;
    display: block;
}

/* 让分隔线和标题左对齐，宽度与标题内容一致 */
.section-title {
    display: inline-block;
    position: relative;
}
.section-title + .section-divider {
    width: 100%;
    max-width: 100%;
}

/* 激活时大标题和分隔线为蓝色 */
.active-section .section-title {
    color: #126CFF;
}
.active-section .section-divider {
    background: #126CFF;
}

/* 3. 副标题样式 */
.section-desc {
    font-family: SourceHanSansSC-Light;
    font-weight: 350;
    font-size: 20px;
    color: #444444;
    margin-bottom: 82px;
    margin-top: 0;
    line-height: 1.7;
}

/* 4. 容器区布局 */
.item-list {
    display: grid;
    grid-template-columns: repeat(2, 698px);
    gap: 40px 44px; /* 垂直40px，水平44px */
    justify-content: start;
    margin-bottom: 80px;
}

.item-box {
    width: 698px;
    height: 478px;
    background: #fff;
    border: none;
    border-radius: 12px;
    box-sizing: border-box;
    display: flex;
    flex-direction: row;
    align-items: center;
    padding: 32px 36px;
    margin: 0;
    position: relative;
}

.item-corner-icon {
    position: absolute;
    left: 66px;
    top: 53px;
    width: 25px;
    height: 29px;
    z-index: 2;
}

.item-title-inline {
    position: absolute;
    left: 107px;
    top: 53px;
    font-size: 26px;
    color: #126CFF;
    font-family: 'SourceHanSansSC-Normal', 'Source Han Sans SC', 'Microsoft YaHei', Arial, sans-serif;
    font-weight: normal;
    line-height: 29px;
    z-index: 2;
}

.item-desc-inline {
    position: absolute;
    left: 66px;
    top: 113px;
    font-size: 20px;
    color: #444444;
    font-family: 'SourceHanSansSC-Light', 'Source Han Sans SC', 'Microsoft YaHei', Arial, sans-serif;
    line-height: 2;
    max-width: 548px; /* 698-66-84 */
    z-index: 2;
    font-weight: 350;
    white-space: pre-line;
}

.item-img {
    position: absolute;
    right: 36px;
    bottom: 32px;
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
}

.item-btn-bg {
    position: absolute;
    left: 66px;
    bottom: 114px;
    width: 146px;
    height: 41px;
    background: url('/static/imgs/zndwzd/back4.png') no-repeat center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3;
}

.item-btn {
    position: relative;
    background: none;
    border: none;
    color: #fff;
    font-size: 18px;
    font-family: 'SourceHanSansSC-Normal', 'Source Han Sans SC', 'Microsoft YaHei', Arial, sans-serif;
    cursor: pointer;
    padding: 0;
    z-index: 4;
    text-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

@media (max-width: 1500px) {
    .item-list {
        grid-template-columns: 1fr;
        gap: 40px 0;
    }
    .item-box {
        width: 100%;
        min-width: 0;
        max-width: 100%;
    }
} 

/* 只针对第一个大标题调整上边距 */
/* .section-block:first-of-type .section-title {
    margin-top: 112px;
}  */

/* 弹窗图片样式，参考智慧集成页面 */
.detail-img-modal {
  position: fixed;
  left: 0; top: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 9999;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow: auto;
  overscroll-behavior: contain;
  padding-top: 80px; /* 添加顶部内边距，确保图片不被顶部导航栏遮挡 */
}
body.modal-open {
  overflow: hidden !important;
}
.detail-img-mask {
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 1;
}
.detail-img-popup {
  border-radius: 8px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
  background: #fff;
  display: block;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}
.detail-img-close {
  position: absolute;
  top: 30px;
  right: 60px;
  font-size: 40px;
  color: #fff;
  z-index: 10;
  cursor: pointer;
  font-weight: bold;
  user-select: none;
}

.banner-fixed470 {
  margin-top: 86px;
  position: relative;
  width: 100%;
  height: 470px;
  overflow: hidden;
  background: #0455da; /* 与蓝条背景色一致 */
  margin-bottom: -1px; /* 消除可能的间隙 */
}
.banner-fixed470 img {
  width: 100%;
  height: 470px;
  object-fit: cover;
  object-position: center;
  display: block;
  margin: 0 auto;
  vertical-align: bottom; /* 消除图片底部可能的间隙 */
}
@media screen and (max-width: 768px) {
  .banner-fixed470 {
    margin-top: 60px;
    height: 300px;
  }
  .banner-fixed470 img {
    height: 300px;
  }
}

.footer {
  margin-top: 300px !important;
}