/* 全局样式设置 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    background-color: #0a1f44; /* 主色调：深蓝色 */
    color: #ffffff; /* 文字颜色：白色 */
    transition: background-color 0.3s, color 0.3s;
}

/* 主题切换按钮样式 */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #00bfff; /* 点缀色 */
    border: none;
    border-radius: 20px;
    padding: 10px 20px;
    color: #ffffff;
    cursor: pointer;
    transition: background-color 0.3s;
    z-index: 1001;
}

.theme-toggle:hover {
    background-color: #008cba;
}

/* 固定导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(10, 31, 68, 0.9); /* 半透明主色调 */
    display: flex;
    justify-content: space-between;
    padding: 15px 30px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.navbar a {
    color: #ffffff;
    text-decoration: none;
    margin: 0 10px;
    transition: color 0.3s;
}

.navbar a:hover {
    color: #00bfff; /* 点缀色悬停效果 */
}

/* 侧边导航栏样式 */
.sidebar {
    position: fixed;
    left: -250px;
    top: 0;
    width: 250px;
    height: 100%;
    background-color: #0a1f44;
    transition: left 0.3s ease;
    padding: 60px 20px;
    box-shadow: 2px 0 5px rgba(0,0,0,0.5);
}

.sidebar.active {
    left: 0;
}

.toggle-button {
    background: none;
    border: none;
    color: #ffffff;
    font-size: 24px;
    cursor: pointer;
}

/* 内容容器样式 */
.container {
    max-width: 1200px;
    margin: 100px auto 50px auto; /* 顶部留出导航栏空间 */
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

/* 网格项样式 */
.grid-item {
    background-color: rgba(255, 255, 255, 0.1); /* 半透明背景 */
    backdrop-filter: blur(10px);
    border-radius: 10px;
    padding: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.grid-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* 标题样式 */
h2, h3, h4 {
    color: #00bfff; /* 点缀色 */
    margin-bottom: 10px;
}

h2 {
    font-size: 24px;
}

h3 {
    font-size: 20px;
}

h4 {
    font-size: 18px;
}

/* 文字段落样式 */
p {
    font-size: 16px;
    margin-bottom: 15px;
}

/* 突出显示样式 */
strong {
    color: #2a5298; /* 辅助色 */
}

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

img.decorative:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0,0,0,0.4);
}

/* 代码块样式 */
pre {
    background-color: rgba(0, 0, 0, 0.7);
    padding: 15px;
    border-radius: 10px;
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.5;
}

code {
    color: #00ffea;
    font-family: 'Courier New', Courier, monospace;
}

/* 互动按钮样式 */
.interactive-button {
    background-color: #1e3c72;
    color: #ffffff;
    padding: 10px 20px;
    border: none;
    border-radius: 25px;
    transition: background-color 0.3s, transform 0.3s;
    cursor: pointer;
}

.interactive-button:hover {
    background-color: #2a5298;
    transform: scale(1.05);
}

/* 滚动动画样式 */
.scroll-animation {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
        margin: 120px 10px 50px 10px;
    }
    
    .navbar {
        padding: 10px 20px;
    }
}