/* 基础样式 */
body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #F5F5F5;
    color: #333333;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
}
h1, h2, h3, h4, h5, h6 {
    color: #4A90E2;
    text-align: center;
}
p, ul, ol, pre {
    margin: 10px 0;
    padding: 0;
}
a {
    text-decoration: none;
    color: #FFA726;
}
a:hover {
    color: #FFC107;
    transition: color 0.3s ease;
}
button {
    background-color: #FFA726;
    color: #FFFFFF;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}
button:hover {
    background-color: #FFC107;
}
.container {
    width: 100%;
    max-width: 1440px;
    padding: 20px;
    box-sizing: border-box;
}
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #FFFFFF;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
}
.header .logo {
    font-size: 24px;
    font-weight: bold;
    color: #4A90E2;
}
.header .menu {
    display: flex;
    gap: 20px;
}
.main {
    margin-top: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 20px 0;
}
.grid-item {
    background-color: #4A90E2;
    color: #FFFFFF;
    padding: 20px;
    text-align: center;
    border-radius: 10px;
    transition: transform 0.3s ease;
}
.grid-item:hover {
    transform: scale(1.05);
}
.card {
    background-color: #FFFFFF;
    border: 1px solid #E0E0E0;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
}
.card:hover {
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}
.footer {
    margin-top: 40px;
    padding: 20px;
    background-color: #333333;
    color: #FFFFFF;
    text-align: center;
    width: 100%;
}
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 10px;
    }
    .grid-container {
        grid-template-columns: 1fr;
    }
}