body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column; /* 修改 flex 方向，让标题和按钮垂直排列 */
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
}

/* 大标题样式 */
.main-title {
    font-size: 48px;
    color: #333;
    margin-bottom: 40px; /* 标题和按钮之间的间距 */
}

.container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.block {
    color: white;
    text-align: center;
    padding: 50px;
    font-size: 24px;
    text-decoration: none;
    border-radius: 10px;
    transition: background-color 0.3s;
}

/* 定义不同颜色的按钮 */
.block-red {
    background-color: #ff4444;
}

.block-red:hover {
    background-color: #cc0000;
}

.block-blue {
    background-color: #007BFF;
}

.block-blue:hover {
    background-color: #0056b3;
}

.block-green {
    background-color: #00C851;
}

.block-green:hover {
    background-color: #007E33;
}

.block-yellow {
    background-color: #ffbb33;
}

.block-yellow:hover {
    background-color: #ff8800;
}

.block-purple {
    background-color: #aa66cc;
}

.block-purple:hover {
    background-color: #9933cc;
}

.block-orange {
    background-color: #ff6600;
}

.block-orange:hover {
    background-color: #cc5200;
}