/* 对冲基金博客样式 - 深蓝主题 */
:root {
    --primary-color: #1e40af;
    --primary-hover: #1e3a8a;
    --secondary-color: #3b82f6;
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --surface-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.7;
}

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

.navbar {
    position: fixed; top: 0; left: 0; right: 0;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000; padding: 16px 0;
}

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

.nav-logo {
    font-size: 1.5rem; font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    display: flex; align-items: center; gap: 10px;
}

.logo-icon { font-size: 1.8rem; }

.nav-links { display: flex; gap: 24px; list-style: none; }
.nav-links a { color: var(--text-secondary); text-decoration: none; transition: color 0.3s; }
.nav-links a:hover { color: var(--primary-color); }

.hero {
    padding: 120px 0 60px; text-align: center;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.15) 0%, rgba(15, 23, 42, 0) 100%);
}

.hero h1 { font-size: 3rem; font-weight: 800; margin-bottom: 20px; color: var(--primary-color); }
.hero p { font-size: 1.25rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

.categories-section { padding: 40px 0; background: var(--surface-color); }
.categories-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }

.category-card {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 12px; padding: 20px; text-align: center;
    transition: all 0.3s; cursor: pointer; text-decoration: none;
}

.category-card:hover { border-color: var(--primary-color); transform: translateY(-4px); }
.category-icon { font-size: 2rem; margin-bottom: 10px; }
.category-name { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.category-count { font-size: 0.875rem; color: var(--text-muted); }

.articles-section { padding: 60px 0; }
.section-title { font-size: 1.5rem; margin-bottom: 30px; }
.articles-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); gap: 24px; }

.article-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px; padding: 24px;
    transition: all 0.3s;
}

.article-card:hover { border-color: var(--primary-color); transform: translateY(-6px); }
.article-content { margin-bottom: 16px; }

.category-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(30, 64, 175, 0.1);
    color: var(--primary-color);
    border-radius: 8px; font-size: 0.75rem; margin-bottom: 12px;
}

.article-content h2 { font-size: 1.25rem; margin-bottom: 10px; }
.article-content h2 a { color: var(--text-primary); text-decoration: none; }
.article-content h2 a:hover { color: var(--primary-color); }
.article-content p { color: var(--text-secondary); font-size: 0.95rem; }

.meta { display: flex; justify-content: space-between; color: var(--text-muted); font-size: 0.875rem; }

.article-detail { padding: 100px 0 60px; max-width: 800px; margin: 0 auto; }
.article-header { margin-bottom: 40px; }
.article-header h1 { font-size: 2.5rem; margin-bottom: 16px; color: var(--primary-color); }

.article-body { font-size: 1.1rem; }
.article-body h2 { font-size: 1.5rem; margin: 30px 0 16px; color: var(--text-primary); }
.article-body h3 { font-size: 1.25rem; margin: 24px 0 12px; color: var(--secondary-color); }
.article-body p { margin-bottom: 16px; color: var(--text-secondary); }
.article-body ul { margin: 16px 0; padding-left: 24px; }
.article-body li { margin-bottom: 8px; color: var(--text-secondary); }
.article-body blockquote {
    background: rgba(30, 64, 175, 0.1);
    border-left: 4px solid var(--primary-color);
    padding: 16px 20px; margin: 20px 0;
    border-radius: 8px; color: var(--text-secondary);
}

.category-page { padding: 100px 0 60px; max-width: 800px; margin: 0 auto; }
.category-header { text-align: center; margin-bottom: 40px; }
.category-header h1 { font-size: 2rem; color: var(--primary-color); }
.category-header p { color: var(--text-secondary); }

.links-section { margin-top: 40px; padding: 30px; background: var(--surface-color); border-radius: 16px; }
.links-section h3 { font-size: 1.25rem; margin-bottom: 20px; color: var(--text-primary); }
.links-grid { display: flex; flex-wrap: wrap; gap: 12px; }
.links-grid a {
    padding: 8px 16px;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none; font-size: 0.875rem;
    transition: all 0.3s;
}
.links-grid a:hover { border-color: var(--primary-color); color: var(--primary-color); }

.footer { background: var(--surface-color); border-top: 1px solid var(--border-color); padding: 40px 0; }
.footer-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; text-align: center; }
.footer-bottom p { color: var(--text-muted); }

@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .articles-grid { grid-template-columns: 1fr; }
    .categories-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-links { display: none; }
}