html {
  font-size: 16px;
  /* 基准值 */
  font-family: 'Microsoft YaHei-Bold', Helvetica;
}

.head {
  width: 100%;
  /* 100%视口宽度 */
  height: 18vw;
  /* 100%视口高度 */
  background-image: url(https://eventech.oss-cn-shanghai.aliyuncs.com/web/waterDesg/Section.png);
  background-repeat: no-repeat;
  /* 避免图片重复 */
  background-position: center;
  /* 图片居中显示 */
}

.go-back {
  position: relative;
  top: 7.5vw;
  color: #e3e4e8;
  font-size: 1rem;
  cursor: pointer;
  z-index: 3;
  padding-left: 15.9375rem;
  display: flex;
  width: 5vw;
  height: 2vw;
}

.back-arrow {
  font-size: 1.9vw;
  font-weight: 100;
  margin-top: -0.5vw;
  margin-right: -0.3vw;
  height: 2vw;
  line-height: 2vw;
}

.go-back:active {
  transform: translateY(2px);
  color: #b0d7e8;
  /* box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2); */
}

.contact {
  position: relative;
  top: 8vw;
  font-size: 1.5rem;
  font-family: Microsoft YaHei-blod;
  color: #fafafa;
  width: 100%;
  height: 2vw;
  text-align: center;
  margin-bottom: 1vw;
}

.container-wrap {
  width: 100%;
  padding-top: 2vw;
  padding-bottom: 2vw;
}


/* 头部引言样式 */
.intro {
  background-image: url(../image/Container2.png);
  height: 7vw;
  width: 80vw;
  margin: 1vw auto;
  justify-content: center;
  display: flex;
  align-items: center;
  /* 垂直居中 */
  background-size: auto 100%;
  background-repeat: no-repeat;
  /* 避免图片重复 */
}

.container2 {
  height: 30vw;
  width: 80vw;
  margin: 0 auto;
}

.container2 h2 {
  font-size: 1.5vw;
  font-weight: 600;
}

.image-container {
  width: 34vw;
  border: 1px solid #ccc;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  margin-left: 3.5vw;
  border-radius: 0.6vw;
}

.image-container img {
  width: 100%;
  height: auto;
}

.text-container {
  width: 35vw;
  padding-left: 3.4375rem;
  padding-top: 2.6vw;
}

.text-container p {
  color: #333;
  line-height: 2.5rem;
  font-size: 1rem;
  color: #5C6170;
}

.container3 {
  height: 50vw;
  width: 80vw;
  margin: 0 auto;
}

.container3 h2 {
  font-size: 1.5vw;
  font-weight: 600;
}

/* 主要功能模块：Flex 布局分左右 */
.main-function {
  display: flex;
  align-items: stretch;
  gap: 20px;
  margin: 3vw auto 1vw auto;
}

.function-img {
  position: relative;
  height: 100%;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.function-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.function-list {
  flex: 2;
  display: flex;
  background: #EBF5F9;
  grid-template-columns: repeat(3, 1fr);
  padding-left: 0.6vw;
  flex-wrap: wrap;
  row-gap: 3.4375rem;
  column-gap: 1.9375rem;
  justify-content: center;
  align-content: center;
}

.function-item {
  padding: 1.2vw;
  padding-left: 2vw;
  display: flex;
  flex-direction: column;
  width: 18.75rem;
  height: 5rem;
  justify-content: center;
}

.function-item strong {
  color: #1d4e63;
  font-weight: 600;
  font-family: 'Microsoft YaHei-Bold', Helvetica;
}

.function-item p {
  color: #5C6170;
}

.function-item i {
  margin-right: 8px;
  color: #0288d1;
  /* 图标色，可替换为实际图标 */
}

/* 新增：PNG 图标样式 */
.function-icon {
  display: inline-block;
  width: 1vw;
  height: 1vw;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  vertical-align: middle;
  position: relative;
  top: 1vw;
  left: -1.5vw;
}

.icon-design {
  background-image: url(../image/sanwei.png);
}

/* 设计图标 */
.icon-download {
  background-image: url(../image/zaixian.png);
}

/* 下载图标 */
.icon-convert {
  background-image: url(../image/erwei.png);
}

/* 转换图标 */
.icon-database {
  background-image: url(../image/shuju.png);
}

/* 数据库图标 */
.icon-calculate {
  background-image: url(../image/jisuan.png);
}

/* 计算图标 */
.icon-analysis {
  background-image: url(../image/liuchang.png);
}

/* 分析图标 */
.icon-true {
  background-image: url(../image/true.png);
  width: 1.5vw;
  height: 1.5vw;
  top: 1.5vw;
  left: -1.8vw;
}

/* 分析图标 */

/* 现有设计模块：卡片布局 */
.design-modules {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2vw;
  /* margin-bottom: 40px; */
}

.module-card {
  background: #f8fcff;
  padding: 1.5625rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.module-card h3 {
  font-size: 1rem;
  margin-bottom: 10px;
  color: #4DA6CB;
}

/* 标题样式 */
.container3 .section-title {
  font-size: 1.5rem;
  font-weight: bold;
  color: #1d4e63;
  padding-left: 10px;
  margin: 2vw 0 2vw 0;
}


.container4 {
  height: 26vw;
  width: 80vw;
  margin: 0 auto;
}

.container4 h2 {
  font-size: 1.5vw;
  font-weight: 600;
}

/* 优势模块整体容器 */
.advantage-section {
  width: 100%;
  margin: 2vw auto 0 auto;
  /* padding: 2vw 0 0.1vw 0;  */
  padding-top: 2vw;
  padding-bottom: 1.2vw;
  background-color: #f9f9f9;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

/* 标题样式 */
.container4 .section-title {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1vw;
  color: #333;
}



/* 优势列表布局（flex 实现一行排列，适配不同屏幕） */
.advantage-list {
  display: flex;
  flex-wrap: wrap;
  margin: 0 auto;
  width: 80%;
  justify-content: space-between;
}

/* 单个优势项样式 */
.advantage-item {
  width: calc(50% - 20px);
  border-radius: 6px;
  padding-left: 2.6vw;
  transition: all 0.3s ease;
  padding-bottom: 1.5625rem;
}

.advantage-item:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

/* 图标样式（这里用伪元素模拟，也可换成实际图标或 SVG） */
.icon {
  display: inline-block;
  width: 20px;
  height: 20px;
  background-color: #0088cc;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

/* 优势项标题 */
.item-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: #286C89;
}

/* 优势项描述 */
.item-desc {
  font-size: 1rem;
  color: #5C6170;
  line-height: 1.2;
}