/* 全局样式与色彩定义 */
:root {
    --primary-color: #003366;
    --secondary-color: #0074D9;
    --accent-color: #FFC300;
    --background-gradient: linear-gradient(135deg, #003366, #000000);
    --text-color: #FFFFFF;
    --highlight-color: #FF5733;
    --shadow-effect: 0px 4px 12px rgba(0, 0, 0, 0.2);
}

body {
    font-family: 'Montserrat', sans-serif;
    margin: 0;
    padding: 0;
    background: var(--background-gradient);
    color: var(--text-color);
    line-height: 1.6;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.8);
    padding: 1rem;
    z-index: 1000;
    box-shadow: var(--shadow-effect);
}

.navbar a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: bold;
    margin: 0 1rem;
    transition: color 0.3s ease;
}

.navbar a:hover {
    color: var(--accent-color);
}

/* 主体内容区 */
.main-container {
    padding-top: 6rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem;
}

.content-block {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow-effect);
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

.content-block:hover {
    transform: translateY(-5px);
}

/* 图片装饰样式 */
.image-decor {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 1rem;
}

/* 代码块样式 */
pre {
    background: #000000;
    color: var(--accent-color);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
}

code {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
}

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

.fade-in {
    animation: fadeIn 1s ease-in-out;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    overflow: hidden;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

th {
    background: rgba(0, 0, 0, 0.2);
    color: var(--accent-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-container {
        grid-template-columns: 1fr;
    }

    pre {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .navbar a {
        margin: 0.5rem 0;
    }
}