/* 
整体页面样式设置
使用现代CSS3布局和样式，确保响应式设计和视觉美感。
主色调为科技蓝，辅以银灰色，点缀色选用橙色和绿色。
*/

/* 全局样式 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #1e3c72, #2a5298); /* 渐变背景 */
    color: #ffffff;
}

/* 导航栏样式 */
.navbar {
    background-color: rgba(30, 60, 114, 0.9); /* 半透明科技蓝 */
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar ul {
    list-style: none;
    display: flex;
    justify-content: center;
    padding: 15px 0;
    margin: 0;
}

.navbar ul li {
    margin: 0 20px;
}

.navbar ul li a {
    color: #ffffff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

.navbar ul li a:hover {
    color: #ffcc00; /* 点缀色橙色 */
}

/* 主内容区 */
.main-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding: 100px 20px 50px 20px; /* 顶部留白确保导航栏不覆盖内容 */
}

/* 文章区块 */
article {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

article section {
    margin-bottom: 40px;
}

article h2 {
    font-size: 24px;
    color: #ffcc00;
    margin-bottom: 15px;
}

article p {
    font-size: 16px;
    line-height: 1.6;
    color: #dddddd;
}

article pre {
    background: rgba(0,0,0,0.5);
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 20px 0;
}

article code {
    font-family: 'Courier New', Courier, monospace;
    color: #ffcc00;
}

/* 图片样式 */
img.decorative {
    width: 100%;
    max-width: 320px;
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

img.decorative:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 12px rgba(0,0,0,0.5);
}

/* 提示信息样式 */
.prompt-message {
    text-align: center;
    font-size: 18px;
    color: #ffcc00;
    margin: 20px 0;
    animation: fadeIn 2s ease-in-out;
}

/* 渐变线条 */
.divider {
    height: 2px;
    background: linear-gradient(to right, #ffcc00, #32cd32);
    margin: 40px 0;
    border: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar ul {
        flex-direction: column;
    }

    .navbar ul li {
        margin: 10px 0;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 底部样式 */
.footer {
    background-color: rgba(30, 60, 114, 0.9);
    padding: 20px;
    text-align: center;
    font-size: 14px;
    color: #ffffff;
}