/* ============================================
   HuaQuan Generator - Russian Station Sites
   Catalog Theme v2.0 — V3.0 Standard
   ============================================ */
:root {
    --primary: #1a3c6d;
    --primary-dark: #0f2557;
    --primary-light: #2a5caa;
    --accent: #e8830c;
    --accent-hover: #c9700a;
    --bg: #f5f6f8;
    --card-bg: #ffffff;
    --text: #222222;
    --text-light: #555555;
    --text-muted: #888888;
    --border: #e0e0e0;
    --border-light: #f0f0f0;
    --shadow: 0 2px 12px rgba(0,0,0,0.06);
    --radius: 6px;
    --transition: 0.2s ease;
}

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

body {
    font-family: -apple-system, 'Segoe UI', Arial, 'Helvetica Neue', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    font-size: 15px;
}

a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }

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

/* ===== Header ===== */
.site-header {
    background: var(--primary);
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 16px rgba(0,0,0,0.15);
}
.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    flex-wrap: wrap;
    gap: 10px;
}
.logo a { color: #fff; font-size: 1.2rem; font-weight: 700; }
.logo img { height: 40px; }
.main-nav ul { display: flex; gap: 4px; list-style: none; flex-wrap: wrap; }
.main-nav a {
    color: rgba(255,255,255,0.82);
    padding: 6px 13px;
    border-radius: 4px;
    font-size: 0.88rem;
    transition: var(--transition);
    white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active { background: rgba(255,255,255,0.14); color: #fff; }

/* ===== Network Bar ===== */
.network-bar {
    background: var(--primary-dark);
    padding: 6px 0;
    overflow-x: auto;
    white-space: nowrap;
}
.network-bar .container { padding: 0 20px; }
.network-nav { display: flex; gap: 6px; list-style: none; }
.network-nav a {
    color: rgba(255,255,255,0.6);
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 3px;
    transition: var(--transition);
}
.network-nav a:hover, .network-nav a.active {
    color: #fff;
    background: rgba(255,255,255,0.1);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    padding: 10px 0;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--text); }

/* ===== Page Hero ===== */
.page-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    padding: 40px 0;
}
.page-hero h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: 12px; }
.hero-subtitle { font-size: 0.95rem; opacity: 0.9; line-height: 1.6; max-width: 900px; }

/* ===== Key Takeaways ===== */
.key-takeaways { padding: 30px 0; }
.key-takeaways h2 { font-size: 1.3rem; color: var(--primary); margin-bottom: 16px; }
.takeaway-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.takeaway-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
    border-left: 4px solid var(--accent);
}
.takeaway-card h3 { font-size: 0.95rem; color: var(--primary); margin-bottom: 6px; }
.takeaway-card p { font-size: 0.85rem; color: var(--text-light); }

/* ===== Content Section ===== */
.content-section { padding: 20px 0 40px; }
.content-section h2 {
    font-size: 1.3rem;
    color: var(--primary);
    margin: 28px 0 14px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--accent);
}
.content-section h3 { font-size: 1.1rem; color: var(--text); margin: 20px 0 10px; }
.content-section p { margin-bottom: 14px; color: var(--text-light); line-height: 1.7; }
.content-section ul, .content-section ol { margin: 10px 0 14px 24px; color: var(--text-light); }
.content-section li { margin-bottom: 6px; }

/* ===== Cards ===== */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    transition: var(--transition);
    border: 1px solid transparent;
}
.card:hover { border-color: var(--border); transform: translateY(-2px); box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
.card h3 { font-size: 1.05rem; margin-bottom: 8px; color: var(--primary); }
.card h3 a { color: var(--primary); }
.card h3 a:hover { color: var(--accent); }
.card p { font-size: 0.88rem; color: var(--text-light); line-height: 1.55; }
.card-meta { font-size: 0.78rem; color: var(--text-muted); margin-top: 10px; }

/* ===== Product Grid ===== */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; margin: 16px 0 24px; }
.product-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}
.product-card:hover { transform: translateY(-3px); box-shadow: 0 6px 24px rgba(0,0,0,0.12); }
.product-card img { width: 100%; height: 180px; object-fit: cover; background: var(--bg); }
.product-card h4 { font-size: 0.95rem; margin: 12px 14px 6px; color: var(--primary); }
.product-card p { font-size: 0.82rem; color: var(--text-light); margin: 0 14px 12px; }
.product-price { color: var(--accent); font-weight: 700; font-size: 1.1rem; margin: 0 14px 12px; }

/* ===== Spec Table ===== */
.spec-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0 24px;
    font-size: 0.88rem;
}
.spec-table th {
    background: var(--primary);
    color: #fff;
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
}
.spec-table td {
    border: 1px solid var(--border);
    padding: 9px 14px;
    color: var(--text-light);
}
.spec-table tr:nth-child(even) { background: var(--bg); }
.table-note { font-size: 0.8rem; color: var(--text-muted); margin-top: -16px; }

/* ===== Benefits ===== */
.benefits-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 18px; margin: 16px 0 24px; }
.benefit-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
}
.benefit-item h3 { font-size: 0.95rem; color: var(--primary); margin-bottom: 8px; }
.benefit-item p { font-size: 0.85rem; color: var(--text-light); }

/* ===== App List ===== */
.app-list { list-style: none; margin: 10px 0 20px; }
.app-list li {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 12px 16px;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ===== FAQ ===== */
.faq-section { padding: 30px 0; }
.faq-section h2 { font-size: 1.3rem; color: var(--primary); margin-bottom: 20px; }
.faq-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px 20px;
    margin-bottom: 12px;
}
.faq-item h3 { font-size: 0.95rem; color: var(--primary); margin-bottom: 8px; cursor: pointer; }
.faq-item p { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; }

/* ===== CTA ===== */
.cta-section {
    background: linear-gradient(135deg, var(--accent) 0%, #d4780a 100%);
    color: #fff;
    padding: 40px 0;
    text-align: center;
    margin: 30px 0 0;
}
.cta-section h2 { font-size: 1.4rem; margin-bottom: 10px; }
.cta-section p { font-size: 0.95rem; opacity: 0.95; margin-bottom: 20px; }
.btn-cta {
    display: inline-block;
    background: #fff;
    color: var(--accent);
    padding: 12px 32px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 1rem;
    transition: var(--transition);
}
.btn-cta:hover { background: var(--primary-dark); color: #fff; }

/* ===== Summary ===== */
.summary-section {
    background: var(--card-bg);
    border-top: 3px solid var(--accent);
    padding: 30px 0;
    margin-top: 30px;
}
.summary-section h2 { font-size: 1.2rem; color: var(--primary); margin-bottom: 12px; }
.summary-section p { color: var(--text-light); line-height: 1.7; }

/* ===== Comparison Table ===== */
.compare-table { width: 100%; border-collapse: collapse; margin: 16px 0 24px; font-size: 0.88rem; }
.compare-table th { background: var(--primary); color: #fff; padding: 10px 14px; text-align: center; }
.compare-table td { border: 1px solid var(--border); padding: 9px 14px; text-align: center; color: var(--text-light); }
.compare-table .highlight { background: #fff8e1; font-weight: 600; }

/* ===== Decision Tree ===== */
.decision-tree { margin: 20px 0; }
.decision-step {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px 20px;
    margin-bottom: 12px;
    border-left: 4px solid var(--primary-light);
}
.decision-step h3 { font-size: 0.95rem; color: var(--primary); margin-bottom: 6px; }
.decision-step p { font-size: 0.85rem; color: var(--text-light); }

/* ===== Tech Article ===== */
.tech-article { line-height: 1.8; font-size: 0.95rem; color: var(--text); }
.tech-article h2 { font-size: 1.3rem; color: var(--primary); margin: 28px 0 12px; }
.tech-article h3 { font-size: 1.1rem; color: var(--text); margin: 20px 0 8px; }
.tech-article p { margin-bottom: 14px; color: var(--text-light); }
.tech-article ul, .tech-article ol { margin: 10px 0 14px 24px; color: var(--text-light); }
.tech-article table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.tech-article th, .tech-article td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.tech-article th { background: var(--primary); color: #fff; font-weight: 600; }
.tech-article tr:nth-child(even) { background: var(--bg); }

/* ===== News Card ===== */
.news-list { display: grid; gap: 16px; }
.news-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    transition: var(--transition);
}
.news-card:hover { transform: translateY(-2px); box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
.news-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.news-card h3 a { color: var(--primary); }
.news-card .news-date { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 8px; }
.news-card .news-excerpt { font-size: 0.88rem; color: var(--text-light); }

/* ===== Scenario Page ===== */
.scenario-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); gap: 20px; margin: 20px 0; }
.scenario-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    transition: var(--transition);
}
.scenario-card:hover { transform: translateY(-2px); box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
.scenario-card h3 { font-size: 1.05rem; color: var(--primary); margin-bottom: 10px; }
.scenario-card p { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; }
.scenario-card .scenario-spec { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border-light); font-size: 0.82rem; color: var(--text-muted); }

/* ===== Sidebar Layout ===== */
.sidebar-layout { display: grid; grid-template-columns: 260px 1fr; gap: 24px; }
@media (max-width: 768px) { .sidebar-layout { grid-template-columns: 1fr; } }
.sidebar { position: sticky; top: 80px; }
.sidebar-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
    margin-bottom: 16px;
}
.sidebar-card h3 {
    font-size: 0.9rem;
    color: var(--text);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.sidebar-card ul { list-style: none; }
.sidebar-card li { margin-bottom: 2px; }
.sidebar-card li a {
    display: block;
    padding: 7px 10px;
    font-size: 0.88rem;
    color: var(--text-light);
    border-radius: 3px;
    transition: var(--transition);
}
.sidebar-card li a:hover { background: var(--bg); color: var(--accent); }

/* ===== Related Links ===== */
.related-links { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 8px; margin: 16px 0; }
.related-links a {
    display: block;
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 10px 14px;
    font-size: 0.85rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    color: var(--text-light);
}
.related-links a:hover { color: var(--accent); transform: translateY(-1px); }

/* ===== Pagination ===== */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 30px; }
.pagination a, .pagination span {
    display: inline-block;
    padding: 8px 14px;
    background: var(--card-bg);
    border-radius: 4px;
    font-size: 0.88rem;
    color: var(--text-light);
    box-shadow: var(--shadow);
}
.pagination a:hover { background: var(--primary); color: #fff; }
.pagination .current { background: var(--primary); color: #fff; font-weight: 600; }

/* ===== Footer ===== */
.site-footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.65);
    padding: 30px 20px;
    margin-top: 40px;
    font-size: 0.82rem;
    line-height: 1.8;
}
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; max-width: 1200px; margin: 0 auto; }
.footer-col h4 { color: #fff; font-size: 0.92rem; margin-bottom: 12px; }
.footer-col a { color: rgba(255,255,255,0.55); display: block; }
.footer-col a:hover { color: var(--accent); }
.footer-col ul { list-style: none; }
.footer-bottom { max-width: 1200px; margin: 20px auto 0; padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.1); text-align: center; }

/* ===== Meta Info ===== */
.meta-info {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin: 8px 0 16px;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* ===== Article TOC ===== */
.toc {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px 24px;
    margin-bottom: 24px;
}
.toc h3 { font-size: 1rem; color: var(--primary); margin-bottom: 12px; }
.toc ol { margin-left: 20px; font-size: 0.88rem; }
.toc li { margin-bottom: 4px; }
.toc a { color: var(--text-light); }

/* ===== Schema Hidden ===== */
.schema-hidden { display: none; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .site-header .container { flex-direction: column; align-items: flex-start; }
    .main-nav { margin-top: 8px; }
    .main-nav ul { flex-wrap: wrap; }
    .card-grid, .product-grid, .scenario-grid { grid-template-columns: 1fr; }
    .takeaway-grid, .benefits-grid { grid-template-columns: 1fr; }
    .spec-table { font-size: 0.78rem; }
    .spec-table th, .spec-table td { padding: 6px 8px; }
    .footer-grid { grid-template-columns: 1fr; }
}