body {
  margin: 0;
  font-family: "Microsoft YaHei", Arial, sans-serif;
  background: #f7f9fa;
  color: #222;
}

/* 顶部Banner */
.banner {
  background: linear-gradient(120deg, #0a1a3c 60%, #1e3a5c 100%), url('image/成片33.png') center center/cover no-repeat;
  color: #fff;
  padding: 48px 0 32px 0;
  text-align: center;
  position: relative;
}
.banner-content h1 {
  font-size: 36px;
  font-weight: bold;
  margin-bottom: 32px;
  letter-spacing: 2px;
}
.banner-logos {
  display: flex;
  justify-content: center;
  gap: 32px;
}
.logo-chip {
  display: inline-block;
  background: #fff;
  color: #222;
  border-radius: 20px;
  padding: 8px 28px;
  font-size: 18px;
  font-weight: 500;
  margin: 0 8px;
  box-shadow: 0 2px 8px #0002;
}
.banner-img {
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

/* 导航栏 */
.nav-bar {
  background: #fff;
  border-bottom: 1px solid #eee;
}
.nav-bar ul {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  height: 56px;
}
.nav-bar li {
  margin: 0 32px;
  font-size: 18px;
  color: #222;
  cursor: pointer;
  padding-bottom: 6px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-bottom 0.2s;
}
.nav-bar li.active,
.nav-bar li:hover {
  color: #1890ff;
  border-bottom: 2px solid #1890ff;
}

/* 去除导航栏a标签的默认样式 */
.nav-bar a {
  color: inherit;
  text-decoration: none;
  font: inherit;
  display: block;
  height: 100%;
  width: 100%;
}
.nav-bar a:hover, .nav-bar a:active, .nav-bar a:visited {
  color: inherit;
  text-decoration: none;
}

/* 产品介绍区 */
.product-intro-section {
  background: #fff;
  padding: 40px 0 0 0;
  text-align: center;
}
.product-intro-section h2 {
  font-size: 26px;
  font-weight: 600;
  margin-bottom: 24px;
  color: #222;
  border-bottom: 2px solid #1890ff;
  display: inline-block;
  padding-bottom: 4px;
}
.product-intro-main {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  margin-top: 32px;
  gap: 60px;
}
.intro-left {
  max-width: 380px;
  text-align: left;
}
.intro-title {
  font-size: 22px;
  font-weight: 500;
  margin-bottom: 18px;
  color: #222;
  line-height: 1.4;
}
.intro-desc {
  font-size: 16px;
  color: #444;
  line-height: 1.8;
}
.intro-right img {
  width: 420px;
  border-radius: 10px;
  box-shadow: 0 2px 12px #0001;
}

/* 产品列表 */
.product-list-section {
  background: #fff;
  padding: 40px 0 60px 0;
}
.product-list {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}
.product-item {
  background: #f7f9fa;
  border-radius: 10px;
  box-shadow: 0 2px 8px #e0e0e0;
  padding: 24px 18px 18px 18px;
  width: 200px;
  text-align: center;
  transition: transform 0.2s;
}
.product-item:hover {
  transform: translateY(-8px) scale(1.03);
}
.product-item img {
  width: 120px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 12px;
}
.product-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #1890ff;
}
.product-desc {
  font-size: 14px;
  color: #666;
}

/* 底部 */
.footer {
  background: #222;
  color: #fff;
  text-align: center;
  padding: 32px 0 20px 0;
  font-size: 16px;
  letter-spacing: 1px;
  margin-top: 40px;
}

/* 算法功能模块 */
.algorithm-section {
  background: #f8fafc;
  padding: 48px 0 48px 0;
  margin-top: 0;
  text-align: center;
}
.algorithm-section h2 {
  font-size: 28px;
  font-weight: bold;
  margin-bottom: 32px;
  position: relative;
  display: inline-block;
}
.algorithm-section .underline {
  display: block;
  width: 40px;
  height: 4px;
  background: #1890ff;
  border-radius: 2px;
  margin: 8px auto 0 auto;
}
.algorithm-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  background: #eaf4ff;
  border-radius: 12px;
  padding: 32px 16px 24px 16px;
  max-width: 1200px;
  margin: 0 auto;
}
.algorithm-group {
  min-width: 220px;
  flex: 1 1 220px;
  margin: 0 12px;
}
.group-title {
  font-size: 18px;
  font-weight: 600;
  color: #1890ff;
  margin-bottom: 16px;
  text-align: left;
}
.group-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.group-list span {
  background: #fff;
  color: #222;
  border-radius: 6px;
  padding: 8px 18px;
  font-size: 15px;
  margin-bottom: 8px;
  box-shadow: 0 1px 4px #dbeafe;
  transition: box-shadow 0.2s, background 0.2s;
  cursor: default;
  display: inline-block;
}
.group-list span:hover {
  background: #e6f7ff;
  box-shadow: 0 2px 8px #b6e0fe;
}

/* 核心优势模块 */
.advantage-section {
  background: #fff;
  padding: 48px 0 32px 0;
  text-align: center;
}
.advantage-section h2 {
  font-size: 28px;
  font-weight: bold;
  margin-bottom: 32px;
  position: relative;
  display: inline-block;
}
.advantage-section .underline {
  display: block;
  width: 40px;
  height: 4px;
  background: #1890ff;
  border-radius: 2px;
  margin: 8px auto 0 auto;
}
.advantage-icons {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 80px;
  margin-bottom: 24px;
}
.advantage-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 120px;
}
.advantage-icon {
  width: 64px;
  height: 64px;
  background: #eaf4ff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}
.advantage-icon img {
  width: 40px;
  height: 40px;
}
.advantage-title {
  font-size: 18px;
  font-weight: 600;
  color: #222;
  margin-bottom: 0;
}
.advantage-list-box {
  display: flex;
  justify-content: center;
  gap: 40px;
  background: #fcfdff;
  border-radius: 12px;
  box-shadow: 0 2px 8px #e0e0e0;
  padding: 24px 0 16px 0;
  max-width: 1100px;
  margin: 0 auto;
}
.advantage-list {
  flex: 1 1 180px;
  min-width: 180px;
}
.advantage-list ul {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
}
.advantage-list li {
  font-size: 15px;
  color: #222;
  margin-bottom: 10px;
  padding-left: 18px;
  position: relative;
}
.advantage-list li:before {
  content: "\2022";
  color: #1890ff;
  font-size: 18px;
  position: absolute;
  left: 0;
  top: 0;
}

/* 管理平台模块 */
.platform-section {
 
  padding: 48px 0 32px 0;
  text-align: center;
  position: relative;
}
.platform-section h2 {
  font-size: 28px;
  font-weight: bold;
  margin-bottom: 32px;
  position: relative;
  display: inline-block;
  z-index: 1;
}
.platform-section .underline {
  display: block;
  width: 40px;
  height: 4px;
  background: #1890ff;
  border-radius: 2px;
  margin: 8px auto 0 auto;
  z-index: 1;
}
.platform-section::before {
  content: '';
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.85);
  z-index: 0;
}
.platform-section > * {
  position: relative;
  z-index: 1;
}
.platform-img-box {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin: 0 auto;
}
.platform-img-box img {
  max-width: 90vw;
  max-height: 480px;
  border-radius: 12px;
  box-shadow: 0 4px 24px #0002;
  background: #f7f9fa;
}
@media (max-width: 900px) {
  .platform-img-box img {
    max-width: 100vw;
    max-height: 220px;
  }
}

/* 算法功能区域卡片样式参考图片风格 */
.algorithm-content span {
  background: #eaf4ff;
  color: #222;
  border-radius: 8px;
  padding: 24px 0;
  font-size: 18px;
  margin-bottom: 20px;
  margin-right: 0;
  min-width: 220px;
  width: 16vw;
  max-width: 260px;
  box-shadow: none;
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 400;
  text-align: center;
  transition: background 0.2s;
  cursor: default;
}
.algorithm-content span:hover {
  background: #d0eaff;
}

/* 让算法内容整体居中且有更大间距 */
.algorithm-content {
  justify-content: flex-start;
  gap: 24px 24px !important;
  padding: 24px 2vw 24px 2vw !important;
}

/* 响应式 */
@media (max-width: 900px) {
  .product-intro-main {
    flex-direction: column;
    align-items: center;
    gap: 32px;
  }
  .intro-right img {
    width: 90vw;
    max-width: 420px;
  }
  .product-list {
    gap: 20px;
  }
  .algorithm-content {
    flex-direction: column;
    gap: 20px;
    padding: 20px 4vw 16px 4vw;
  }
  .algorithm-group {
    min-width: 0;
    margin: 0;
  }
  .advantage-icons {
    gap: 24px;
  }
  .advantage-list-box {
    flex-direction: column;
    gap: 0;
    padding: 16px 0 8px 0;
  }
  .advantage-list {
    min-width: 0;
    margin-bottom: 12px;
  }
}