/* 纳斯达克100指数网站样式 - 深色金融主题 */

/* 基础变量 */
:root {
    --bg-primary: #0A0E1A;
    --bg-secondary: #111827;
    --bg-tertiary: #1E293B;
    --border-color: #1E293B;
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --accent-blue: #3B82F6;
    --accent-blue-hover: #2563EB;
    --color-up: #EF4444;
    --color-down: #10B981;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* 导航栏 */
.navbar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-brand i {
    color: var(--accent-blue);
    font-size: 24px;
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius);
    transition: var(--transition);
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

.nav-actions {
    display: flex;
    gap: 12px;
}

.btn-refresh {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-refresh:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

.nav-ai {
    font-size: 18px;
    padding: 8px 12px;
    color: var(--text-secondary);
}
.nav-ai:hover {
    color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.1);
}

/* 主内容区 */
.main-content {
    padding: 40px 0;
    min-height: calc(100vh - 64px - 200px);
}

/* 卡片 */
.card {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 30px;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.card-header {
    margin-bottom: 24px;
}

.card-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.card-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 指数卡片 */
.index-card {
    text-align: center;
    padding: 40px;
}

.index-value {
    margin: 40px 0;
}

.price {
    font-size: 72px;
    font-weight: 700;
    font-family: 'DIN Alternate', 'DIN', 'Barlow Condensed', -apple-system, BlinkMacSystemFont, sans-serif;
    letter-spacing: -1px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.change {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.change-value {
    font-size: 32px;
    font-weight: 600;
    font-family: 'DIN Alternate', 'DIN', 'Barlow Condensed', -apple-system, BlinkMacSystemFont, sans-serif;
}

.change-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 涨跌颜色 */
.up {
    color: var(--color-up) !important;
}

.down {
    color: var(--color-down) !important;
}

/* 指数信息 */
.index-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.info-item {
    text-align: center;
}

.info-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.info-value {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 快捷入口 */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.action-card {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 20px;
}

.action-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.action-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-blue), #8B5CF6);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    flex-shrink: 0;
}

.action-content {
    flex: 1;
}

.action-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.action-content p {
    font-size: 14px;
    color: var(--text-secondary);
}

.action-arrow {
    color: var(--text-muted);
    font-size: 16px;
}

/* 市场概览 */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}

.overview-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius);
}

.overview-icon {
    width: 48px;
    height: 48px;
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--accent-blue);
}

.overview-content {
    flex: 1;
}

.overview-value {
    font-size: 24px;
    font-weight: 600;
    font-family: 'DIN Alternate', 'DIN', 'Barlow Condensed', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.overview-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 加载状态 */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 100px 0;
    color: var(--text-secondary);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 错误状态 */
.error-card {
    text-align: center;
    padding: 60px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.error-card i {
    font-size: 48px;
    color: var(--color-up);
    margin-bottom: 20px;
}

.error-card p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background-color: var(--accent-blue);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-blue-hover);
}

/* 页脚 */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-info p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 4px;
}

.footer-disclaimer {
    font-size: 12px !important;
    color: var(--text-muted) !important;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-blue);
}

/* 工具类 */
.hidden {
    display: none !important;
}

/* 响应式设计 */
/* 标签切换 */
.tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tab {
    padding: 10px 24px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tab:hover {
    color: var(--text-primary);
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.1);
}

.tab.active {
    background: var(--accent-blue);
    color: #fff;
    border-color: var(--accent-blue);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .tabs { gap: 6px; }
    .tab { padding: 8px 16px; font-size: 13px; }
    
    .price {
        font-size: 48px;
    }
    
    .change-value {
        font-size: 24px;
    }
    
    .index-info {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 16px;
    }
    
    .card {
        padding: 20px;
    }
    
    .index-card {
        padding: 30px 20px;
    }
    
    .price {
        font-size: 36px;
    }
    
    .action-card {
        flex-direction: column;
        text-align: center;
    }
    
    .action-arrow {
        display: none;
    }
}