/* 导入字体 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&family=ZCOOL+XiaoWei&display=swap');

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基础变量 */
:root {
    --primary-color: #4a90e2;
    --text-light: #ffffff;
    --text-gray: rgba(255, 255, 255, 0.8);
    --background-dark: #1a1a1a;
    --nav-bg: rgba(26, 26, 26, 0.95);
    --card-bg: rgba(255, 255, 255, 0.08);
    --hover-bg: rgba(74, 144, 226, 0.1);
    --active-bg: rgba(74, 144, 226, 0.15);
    --border-color: rgba(255, 255, 255, 0.1);
}

/* 全局样式 */
body {
    background-color: var(--background-dark);
    color: var(--text-light);
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    min-height: 100vh;
}

/* 导航栏 */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: flex-start;
    gap: 2rem;
}

.nav-item {
    color: var(--text-light);
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.nav-item:hover {
    background: var(--hover-bg);
    color: var(--primary-color);
}

.nav-item.active {
    background: var(--active-bg);
    color: var(--primary-color);
}

/* 主内容区域 */
.main-content {
    max-width: 1200px;
    margin: 80px auto 0;
    padding: 2rem;
}

/* 内容区块 */
.content-section {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.content-section.active {
    display: block;
    opacity: 1;
}

/* 数据块样式 */
.data-block {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

/* 标题和文本样式 */
h2 {
    color: var(--text-light);
    font-size: 2.2rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 2rem;
    font-family: 'ZCOOL XiaoWei', serif;
}

h3 {
    color: var(--text-light);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    font-family: 'ZCOOL XiaoWei', serif;
}

p {
    color: var(--text-gray);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

/* 图表容器 */
.chart-container {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    padding: 1.5rem;
    height: 400px;
    margin: 2rem 0;
    border: 1px solid var(--border-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
        gap: 1rem;
    }
    
    .nav-item {
        padding: 0.5rem 1rem;
        font-size: 1rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .data-block {
        padding: 1.5rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    h3 {
        font-size: 1.3rem;
    }
}