/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    /* 使用线性渐变作为背景，主色调为深蓝到黑色 */
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    font-family: 'Roboto', 'Helvetica', 'Arial', sans-serif;
    color: #ffffff;
    /* 设置整体的流式布局和响应式设计 */
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 导航栏样式 */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    /* 半透明黑色背景 */
    background: rgba(20, 20, 20, 0.8);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 50px;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

/* 导航链接样式 */
nav a {
    color: #00FFFF;
    margin: 0 15px;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease, transform 0.3s ease;
}

nav a:hover {
    color: #00FF00;
    transform: scale(1.1);
}

/* 搜索框样式 */
.search-box {
    background: rgba(255, 255, 255, 0.1);
    padding: 5px 10px;
    border-radius: 5px;
}

/* 主要内容容器 */
.main-content {
    flex: 1;
    padding: 100px 50px 50px 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
    /* 使用网格布局 */
    display: grid;
    grid-template-columns: 1fr;
    grid-gap: 40px;
}

/* 显著提示文本样式 */
.prominent-message {
    font-size: 24px;
    font-weight: bold;
    color: #FF00FF;
    text-align: center;
    margin-bottom: 40px;
    animation: fadeIn 2s ease-in-out;
}

/* 文章样式 */
article {
    max-width: 800px;
    width: 100%;
    background: rgba(0, 0, 0, 0.7);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

article:hover {
    transform: scale(1.02);
}

/* 标题样式 */
h2, h3 {
    color: #00FFFF;
    margin-bottom: 20px;
}

h2 {
    font-size: 28px;
}

h3 {
    font-size: 22px;
}

/* 段落样式 */
p {
    font-size: 16px;
    line-height: 1.6;
    color: #dddddd;
    margin-bottom: 20px;
}

/* 高亮文字样式 */
.highlight {
    color: #FF00FF;
    font-weight: 600;
}

/* 代码块样式 */
pre {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 20px;
}

code {
    color: #00FFFF;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
}

/* 图片样式 */
.decorative-image {
    width: 100%;
    max-width: 320px;
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.decorative-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.7);
}

/* 网格容器 */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

/* 卡片样式 */
.card {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.card h4 {
    color: #00FFFF;
    margin-bottom: 10px;
}

.card p {
    color: #dddddd;
}

/* 视频容器样式 */
.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    padding-top: 25px;
    height: 0;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 10px;
}

/* 语言切换器样式 */
.language-switcher {
    position: relative;
    display: inline-block;
}

.language-switcher button {
    background: transparent;
    border: none;
    color: #00FFFF;
    cursor: pointer;
    font-size: 16px;
}

.language-switcher-content {
    display: none;
    position: absolute;
    background: rgba(20, 20, 20, 0.9);
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

.language-switcher-content a {
    color: #ffffff;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    font-size: 14px;
}

.language-switcher-content a:hover {
    background-color: #00FFFF;
    color: #000000;
}

.language-switcher:hover .language-switcher-content {
    display: block;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    nav {
        padding: 15px 30px;
    }

    nav a {
        margin: 0 10px;
        font-size: 14px;
    }

    .main-content {
        padding: 100px 20px 20px 20px;
        grid-gap: 20px;
    }

    .prominent-message {
        font-size: 20px;
    }

    article {
        padding: 20px;
    }

    h2 {
        font-size: 24px;
    }

    h3 {
        font-size: 20px;
    }

    p {
        font-size: 14px;
    }

    .grid-container {
        grid-template-columns: 1fr;
    }

    .decorative-image {
        max-width: 100%;
    }
}