/* 页面通用样式 */
body {
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    background-color: #f5f5f5;
    overflow-x: hidden; /* 避免水平滚动条 */
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Roboto', sans-serif;
    font-weight: bold;
    color: #0A2463;
    margin-top: 1.5em;
    margin-bottom: 0.8em;
}

p, ul, ol, table, pre {
    margin-bottom: 1.2em;
    line-height: 1.6;
    color: #555;
}

a {
    color: #FF7E00;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* 全局容器和布局 */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.section {
    padding: 60px 0;
    background-color: #fff;
    border-bottom: 1px solid #eee;
}

.section:last-child {
    border-bottom: none;
}

/* 头部导航 */
.header {
    background: linear-gradient(to right, #0A2463, #1a3a8a);
    padding: 20px 0;
    color: #fff;
    position: relative; /* 为 logo 绝对定位提供相对定位上下文 */
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    position: absolute; /* 绝对定位 logo */
    top: 50%;
    left: 20px; /* 调整 logo 位置 */
    transform: translateY(-50%); /* 垂直居中 */
}

.nav {
    margin-left: auto; /* 将导航推到右侧 */
}

.nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
}

.nav li {
    margin-left: 25px;
}

.nav a {
    color: #fff;
    display: block;
    padding: 10px 15px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.nav a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    text-decoration: none;
}

/* 首页内容区域 */
.hero {
    background: linear-gradient(to bottom right, #e0f7fa, #c2e0f7);
    padding: 120px 0;
    text-align: center;
}

.hero-content {
    width: 80%;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3em;
    color: #0A2463;
    margin-bottom: 20px;
}

.hero-description {
    font-size: 1.2em;
    color: #555;
    line-height: 1.8;
}

/* 智能生活板块 */
.smart-life {
    background-color: #f9f9f9;
}

.smart-life-content {
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap; /* 允许在小屏幕上换行 */
}

.smart-life-text {
    flex: 1;
    padding: 20px;
    min-width: 300px; /* 确保文本内容不会过分压缩 */
}

.smart-life-image {
    flex: 1;
    padding: 20px;
    text-align: center;
    min-width: 300px; /* 确保图片区域不会过分压缩 */
}

.smart-life-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.1);
}

/* 区块链应用板块 */
.blockchain-app {
    background-color: #fff;
}

.blockchain-app-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* 响应式列 */
    gap: 30px;
    padding: 30px;
}

.blockchain-app-item {
    background-color: #f0f0f0;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 2px 2px 8px rgba(0,0,0,0.05);
    text-align: center;
}

.blockchain-app-item h3 {
    color: #FF7E00;
    margin-bottom: 15px;
}

.blockchain-app-item p {
    color: #666;
}

/* 示例数据展示文章 */
.article-section {
    background-color: #f0f0f0;
    padding: 60px 0;
}

.article-container {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.05);
}

.article-section h2 {
    text-align: center;
    color: #0A2463;
    margin-bottom: 40px;
}

article h2 {
    color: #0A2463;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}

article h3 {
    color: #FF7E00;
}

article ul, article ol {
    padding-left: 25px;
}

article blockquote {
    border-left: 5px solid #ddd;
    padding-left: 15px;
    font-style: italic;
    color: #777;
}

article pre {
    background-color: #f7f7f7;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto; /* 代码块超出时显示滚动条 */
    white-space: pre-wrap; /* 代码自动换行 */
    font-family: monospace;
    font-size: 0.9em;
    color: #222;
    border: 1px solid #eee;
}

article table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1em;
}

article table, article th, article td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: left;
}

article th {
    background-color: #f0f0f0;
    font-weight: bold;
}

/* 页脚 */
.footer {
    background-color: #0A2463;
    color: #fff;
    text-align: center;
    padding: 20px 0;
    font-size: 0.9em;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 15px;
    }
    .header-container {
        flex-direction: column;
        align-items: stretch;
    }
    .logo {
        position: static; /* 移除绝对定位 */
        transform: none; /* 移除垂直居中 */
        text-align: center; /* 居中 logo */
        margin-bottom: 15px; /* 增加 logo 下方间距 */
    }
    .nav {
        margin-left: 0; /* 移除左外边距 */
        text-align: center; /* 居中导航 */
    }
    .nav ul {
        flex-direction: column;
    }
    .nav li {
        margin-left: 0;
        margin-top: 10px;
    }
    .hero {
        padding: 80px 0;
    }
    .hero-title {
        font-size: 2.5em;
    }
    .smart-life-content {
        flex-direction: column; /* 堆叠内容 */
    }
    .smart-life-text, .smart-life-image {
        width: 90%; /* 占据更大宽度 */
        margin-bottom: 20px; /* 增加底部间距 */
        min-width: auto; /* 移除最小宽度限制 */
    }
    .blockchain-app-content {
        grid-template-columns: 1fr; /* 单列布局 */
    }
    .section {
        padding: 40px 0; /* 减少 section 垂直 padding */
    }
    .article-section {
        padding: 40px 0;
    }
    .article-container {
        padding: 20px;
    }
}

/* 小屏幕手机优化 */
@media (max-width: 480px) {
    .hero-title {
        font-size: 2em;
    }
    .hero-description {
        font-size: 1em;
    }
    .section {
        padding: 30px 0; /* 进一步减少 section 垂直 padding */
    }
    .article-section {
        padding: 30px 0;
    }
    .article-container {
        padding: 15px; /* 进一步减少 article container padding */
    }
}

/* 超小屏幕手机优化 */
@media (max-width: 320px) {
    .hero-title {
        font-size: 1.8em;
    }
}