/* 全局样式设置 */
body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #e6f7ff, #fff3e0);
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: bold;
    color: #2c3e50;
}
p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
}
a {
    text-decoration: none;
    color: #1abc9c;
}
a:hover {
    color: #16a085;
}
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}
header .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c3e50;
}
header nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}
header nav ul li a {
    padding: 10px 15px;
    border-radius: 5px;
    transition: all 0.3s ease;
}
header nav ul li a:hover {
    background: #1abc9c;
    color: #fff;
}
main {
    padding: 40px 0;
}
section {
    margin-bottom: 40px;
}
.card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}
.card:hover {
    transform: translateY(-5px);
}
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}
.flex-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}
.image-grid img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    object-fit: cover;
    transition: transform 0.3s ease;
}
.image-grid img:hover {
    transform: scale(1.05);
}
.code-block {
    background: #2c3e50;
    color: #ecf0f1;
    padding: 15px;
    border-radius: 10px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    white-space: pre-wrap;
}
.table-container {
    overflow-x: auto;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}
table th, table td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
}
table th {
    background: #1abc9c;
    color: #fff;
}
footer {
    background: #2c3e50;
    color: #ecf0f1;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }
    header nav ul {
        flex-direction: column;
        gap: 10px;
    }
    .grid-container {
        grid-template-columns: 1fr;
    }
}