/* 全局样式 */
body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
    color: #333;
    line-height: 1.6;
}

header {
    background: #005f73;
    color: #fff;
    padding: 40px 20px;
    text-align: center;
}

nav {
    margin-top: 20px;
}

nav a {
    color: #fff;
    padding: 10px 15px;
    margin: 0 10px;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s;
}

nav a:hover {
    background: #0a9396;
}

/* 内容样式 */
.container {
    max-width: 1200px;
    margin: auto;
    display: flex;
    gap: 20px;
    padding: 20px;
    flex-wrap: wrap;
    justify-content: space-around;
    align-items: stretch;
}

.card {
    background: #fff;
    padding: 20px;
    flex-basis: calc(33.333% - 20px);
    border: 1px solid #ddd;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* 标题样式 */
/* h1, h2 {
    color: #005f73;
} */

h1 {
    font-size: 2.5em;
}

h2 {
    font-size: 2em;
    margin-top: 20px;
}

/* 段落样式 */
p {
    margin: 10px 0;
}

/* 页脚样式 */
footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 0.15px;
    position: relative;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
}
a {
    color: #005f73;
    text-decoration: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .card {
        flex-basis: 100%;
    }
}