/* 基础样式 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #0F4C81, #93C572);
    color: #333;
    line-height: 1.6;
}

/* 标题样式 */
header {
    background: linear-gradient(135deg, #0F4C81, #93C572);
    color: #fff;
    padding: 20px 0;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header h1 {
    margin: 0;
    font-size: 2em;
    font-weight: bold;
}

/* 导航栏样式 */
.navbar {
    display: flex;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    padding: 10px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 999;
    transition: background 0.3s ease;
}

.navbar a {
    color: #fff;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

.navbar a:hover {
    color: #FFD700;
}

/* 主内容区样式 */
.main {
    padding: 100px 20px 50px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* 卡片网格布局 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 50px;
}

/* 单个卡片样式 */
.card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
}

.card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.card-content {
    padding: 20px;
}

.card-content h3 {
    margin-top: 0;
    color: #0F4C81;
    font-size: 1.2em;
}

.card-content p {
    font-size: 0.95em;
    color: #555;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 12px rgba(0,0,0,0.2);
}

/* 示例数据展示区 */
.article-section {
    background: rgba(255, 255, 255, 0.9);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.article-section h2 {
    color: #0F4C81;
    margin-bottom: 20px;
    text-align: center;
}

.article-section h3 {
    color: #93C572;
    margin-top: 20px;
}

.article-section p {
    font-size: 1em;
    color: #333;
}

.article-section ul {
    list-style: disc;
    padding-left: 20px;
}

.article-section pre {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
}

.article-section table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.article-section table, .article-section th, .article-section td {
    border: 1px solid #ddd;
}

.article-section th, .article-section td {
    padding: 10px;
    text-align: left;
}

.article-section th {
    background-color: #f2f2f2;
}

/* 提示信息样式 */
.notice {
    text-align: center;
    font-size: 1.1em;
    color: #FFD700;
    margin-top: 30px;
}

/* 响应式设计 */
@media (max-width: 1440px) {
    header h1 {
        font-size: 1.8em;
    }
}

@media (max-width: 1200px) {
    .card-content h3 {
        font-size: 1.1em;
    }
}

@media (max-width: 1024px) {
    .navbar {
        flex-direction: column;
    }

    .navbar a {
        margin: 10px 0;
    }
}

@media (max-width: 768px) {
    .main {
        padding: 80px 10px 40px 10px;
    }

    .card img {
        height: 150px;
    }

    .article-section {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5em;
    }

    .card-content h3 {
        font-size: 1em;
    }

    .navbar a {
        margin: 8px 0;
        font-size: 0.9em;
    }
}

@media (max-width: 320px) {
    .card img {
        height: 120px;
    }

    .article-section h2 {
        font-size: 1.5em;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 1s ease-in-out;
}