/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 头部容器 */
.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    background-color: #ffffff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* Logo样式 */
.logo {
    width: 180px;
    height: auto;
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.9;
}

/* 导航栏容器 */
.nav-bar {
    display: flex;
    align-items: center;
}

/* 导航列表 */
.nav-list {
    display: flex;
    gap: 40px;
    list-style: none;
}

/* 导航项样式 */
.nav-item {
    position: relative;
    padding: 5px 0;
}

/* 导航链接样式 */
.nav-link {
    text-decoration: none;
    color: #333;
    font-family: 'Segoe UI', sans-serif;
    font-size: 1.1rem;
    transition: color 0.3s ease;
    padding: 5px 10px;
    border-radius: 4px;
}

.nav-link:hover {
    color: #007bff;
    background-color: rgba(0,123,255,0.1);
}

/* 活动状态样式 */
.nav-link.active {
    color: #007bff;
    font-weight: 500;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        padding: 20px;
    }

    .logo {
        margin-bottom: 15px;
    }

    .nav-list {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}


/* 主内容区 */
.content-container {
    margin-top: 100px;
    padding: 40px 20px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.page-header {
    text-align: center;
    margin-bottom: 60px;
}

.system-title {
    font-size: 2.5em;
    color: #2c3e50;
    margin-bottom: 15px;
}

.system-subtitle {
    color: #7f8c8d;
    font-size: 1.2em;
}

/* 解决方案卡片 */
.business-solutions {
    display: grid;
    gap: 30px;
}

.solution-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    padding: 30px;
    position: relative;
    transition: transform 0.3s;
}

.solution-card:hover {
    transform: translateY(-5px);
}

.card-index {
    position: absolute;
    top: -15px;
    left: -15px;
    background: #0d47a1;
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2em;
    font-weight: bold;
}

.card-content h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.8em;
}

.solution-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.feature-list,
.highlight-list {
    list-style: none;
}

.feature-list li,
.highlight-list li {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
    position: relative;
    padding-left: 25px;
}

/* 合并选择器添加圆点 */
.feature-list li::before,
.highlight-list li::before {
    content: "•";
    color: #0d47a1;
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* 技术栈标签 */
.tech-stack {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.stack-tag {
    background: rgba(13,71,161,0.1);
    color: #0d47a1;
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 0.9em;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .content-container {
        margin-top: 80px;
        padding: 20px;
    }

    .solution-details {
        grid-template-columns: 1fr;
    }

    .nav-menu {
        gap: 15px;
    }
}

/* 底部背景图区块 */
.footerPng {
  height: 200px;
  background: linear-gradient(135deg, 
      #0d47a1 20%,  /* 品牌主色深蓝 */
      #2a3a6e 40%,  /* 午夜蓝 */
      #6c5b7b 80%,  /* 蓝紫色 */
      #c06c84       /* 浅品红 */
	);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin-top: 80px;
  /* 添加微纹理提升质感 */
  background-image: 
    radial-gradient(circle at 90% 10%, rgba(255,255,255,0.1) 10%, transparent 30%),
    linear-gradient(135deg, #0d47a1, #6c5b7b);
}

/* 文字增强可读性 */
.footerPng-text {
  color: #fff;
  font-size: 2.2rem;
  letter-spacing: 3px;
  text-shadow: 1px 1px 4px rgba(0,0,0,0.3); /* 添加文字阴影 */
  font-family: 'Microsoft YaHei', sans-serif;
  animation: fadeInUp 0.8s ease;
}

/* 版权信息 */
.footer {
  background: #f8f9fa;
  padding: 25px 0;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.copyright {
  text-align: center;
  color: #666;
  font-size: 0.9rem;
  line-height: 1.6;
}

.icp-link {
  color: #666;
  text-decoration: none;
  transition: color 0.3s ease;
  margin-left: 15px;
}

.icp-link:hover {
  color: #0d47a1;
  text-decoration: underline;
}

/* 动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 响应式适配 */
@media (max-width: 768px) {
  .footerPng {
    height: 150px;
    margin-top: 50px;
  }
  
  .footerPng-text {
    font-size: 1.5rem;
    padding: 0 20px;
    text-align: center;
  }
  
  .copyright {
    font-size: 0.8rem;
  }
}