/* 全局样式定义 */
body {
    margin: 0;
    font-family: 'Open Sans', sans-serif;
    background: linear-gradient(135deg, #0A1F44, #000C24);
    color: #fff;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Roboto Condensed', sans-serif;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    text-align: center;
    background: linear-gradient(90deg, #6C5CE7, #B388EB);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 顶部导航栏 */
.navbar {
    display: flex;
    justify-content: space-around;
    align-items: center;
    background: #0A1F44;
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-item {
    color: #00FFC7;
    text-decoration: none;
    font-weight: bold;
    padding: 10px 20px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-item:hover {
    color: #FF7F50;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: #FF7F50;
    transition: width 0.3s ease, left 0.3s ease;
}

.nav-item:hover::after {
    width: 100%;
    left: 0;
}

/* 内容区域 */
.content-section {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

/* 卡片布局 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: linear-gradient(135deg, #0A1F44, #000C24);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 15px;
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

th, td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

th {
    background: #00FFC7;
    color: #0A1F44;
}

tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.05);
}

/* 代码块样式 */
pre {
    background: #0A1F44;
    color: #00FFC7;
    padding: 15px;
    border-radius: 10px;
    overflow-x: auto;
}

code {
    color: #FF7F50;
    font-family: 'Courier New', Courier, monospace;
}

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

    .nav-item {
        margin: 10px 0;
    }

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

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

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