/* 浅色主题样式 */
body {
    font-family: Arial, sans-serif;
    background-color: #f8faff;
    color: #333;
    max-width: 700px;
    margin: 0 auto;
    padding: 20px;
    line-height: 1.6;
}

h1, h2 {
    color: #007BFF;
}

h1 {
    font-size: 2.2em;
    text-align: center;
    margin-bottom: 10px;
}

h2 {
    font-size: 1.4em;
    text-align: center;
    margin: 10px 0 20px 0;
    color: #0056b3;
}

/* 按钮容器样式 */
.button-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 每行 4 个按钮 */
    gap: 15px;
    justify-items: center; /* 按钮居中 */
}

/* 按钮样式 */
.language-button {
    padding: 12px 20px;
    background: linear-gradient(45deg, #007BFF, #0056b3);
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    font-size: 1em;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0px 4px 10px rgba(0, 123, 255, 0.3);
    text-align: center;
}

.language-button:hover {
    transform: translateY(-3px);
    box-shadow: 0px 8px 15px rgba(0, 86, 179, 0.4);
}

/* 布局样式 */
header, main, footer {
    text-align: center;
    margin-bottom: 15px;
}

/* 页脚样式 */
footer {
    margin-top: 30px;
    padding-top: 10px;
    border-top: 1px solid #ddd;
    font-size: 0.85em;
    color: #555;
}