:root {
    --bg-primary: #FAFCFE;
    --bg-secondary: #F0F4F8;
    --bg-card: #FFFFFF;
    --primary: #10B981;
    --primary-light: #34D399;
    --primary-dark: #059669;
    --primary-bg: rgba(16, 185, 129, 0.08);
    --accent: #6366F1;
    --accent-light: #818CF8;
    --accent-bg: rgba(99, 102, 241, 0.08);
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --border: #E2E8F0;
    --border-light: #F1F5F9;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.2s ease;
    --header-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.logo-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 600;
    background: linear-gradient(135deg, #F59E0B 0%, #D97706 50%, #B45309 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.hero {
    padding: calc(var(--header-height) + 48px) 24px 48px;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    text-align: center;
}

.hero-content {
    max-width: 640px;
    margin: 0 auto;
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, #F59E0B 0%, #D97706 50%, #B45309 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-weight: 400;
}

.stats-bar {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.main-content {
    padding: 32px 0 64px;
}

.search-section {
    margin-bottom: 24px;
}

.search-form {
    display: flex;
    gap: 12px;
    max-width: 560px;
    margin: 0 auto;
}

.search-input {
    flex: 1;
    min-width: 0;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    color: var(--text-primary);
    background: var(--bg-card);
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.search-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.category-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.tab-item {
    display: inline-flex;
    padding: 10px 18px;
    background: var(--bg-card);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.tab-item:hover {
    color: var(--primary);
    border-color: var(--primary);
}

.tab-item.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    border-color: transparent;
}

.content-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 32px;
    align-items: start;
}

.main-column {
    min-width: 0;
}

.sidebar {
    position: sticky;
    top: calc(var(--header-height) + 24px);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.category-sections {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.category-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(180deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: 2px;
}

.view-all {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: var(--transition);
}

.view-all:hover {
    color: var(--primary-dark);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.article-card-mini {
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.article-card-mini:hover {
    background: var(--primary-bg);
    transform: translateY(-2px);
}

.article-card-mini .article-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 0.75rem;
}

.article-card-mini .article-source {
    color: var(--primary);
    font-weight: 500;
}

.article-card-mini .article-date {
    color: var(--text-muted);
}

.article-card-mini .article-title {
    font-size: 0.9375rem;
    font-weight: 500;
    margin-bottom: 8px;
    line-height: 1.5;
}

.article-card-mini .article-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.article-card-mini .article-title a:hover {
    color: var(--primary);
}

.article-card-mini .article-summary {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.articles-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.article-card {
    display: flex;
    gap: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.article-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.article-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 10px;
}

.article-source {
    display: inline-flex;
    padding: 3px 8px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.article-category {
    display: inline-flex;
    padding: 3px 8px;
    background: var(--accent-bg);
    color: var(--accent);
    border-radius: 4px;
    font-size: 0.75rem;
}

.article-date {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.article-title {
    font-size: 1.0625rem;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: 8px;
}

.article-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.article-title a:hover {
    color: var(--primary);
}

.article-summary {
    flex: 1;
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
}

.read-more {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: var(--transition);
}

.read-more:hover {
    color: var(--primary-dark);
}

.view-count {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.article-image {
    width: 180px;
    height: 120px;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.article-card:hover .article-image img {
    transform: scale(1.05);
}

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--accent-bg) 100%);
}

.placeholder-icon {
    font-size: 2.5rem;
    opacity: 0.6;
}

.article-image.no-image .image-placeholder {
    background: var(--bg-secondary);
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.empty-state h3 {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 32px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.page-btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.page-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.page-info {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.sidebar-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--shadow-sm);
}

.sidebar-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.hot-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hot-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: var(--transition);
}

.hot-item:hover {
    background: var(--bg-secondary);
}

.hot-rank {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
}

.hot-item:nth-child(1) .hot-rank { background: linear-gradient(135deg, #EF4444 0%, #F87171 100%); }
.hot-item:nth-child(2) .hot-rank { background: linear-gradient(135deg, #F97316 0%, #FB923C 100%); }
.hot-item:nth-child(3) .hot-rank { background: linear-gradient(135deg, #EAB308 0%, #FACC15 100%); }

.hot-title {
    flex: 1;
    color: var(--text-primary);
    font-size: 0.8125rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.source-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.source-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: var(--transition);
}

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

.source-name {
    color: var(--text-primary);
    font-size: 0.8125rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.source-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    padding: 2px 6px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    border-radius: 10px;
    font-size: 0.6875rem;
    font-weight: 500;
}

.quick-links {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.quick-link {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    transition: var(--transition);
}

.quick-link:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.search-header {
    text-align: center;
    margin-bottom: 32px;
}

.search-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.search-keyword {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.search-keyword span {
    color: var(--primary);
    font-weight: 600;
}

.search-count {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 32px 0;
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 12px;
}

.footer-logo {
    font-size: 1.25rem;
}

.footer-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.footer-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8125rem;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--primary);
}

.footer-divider {
    color: var(--text-muted);
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.75rem;
}

@media (max-width: 1024px) {
    .content-layout {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .article-image {
        width: 140px;
        height: 100px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 12px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        padding: calc(var(--header-height) + 32px) 20px 32px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .stats-bar {
        gap: 32px;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .search-form {
        flex-direction: column;
    }
    
    .search-btn {
        width: 100%;
        justify-content: center;
    }
    
    .category-tabs {
        gap: 6px;
    }
    
    .tab-item {
        padding: 8px 14px;
        font-size: 0.8125rem;
    }
    
    .article-card {
        flex-direction: column;
        padding: 16px;
    }
    
    .article-image {
        width: 100%;
        height: 160px;
    }
    
    .category-section {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .stats-bar {
        gap: 24px;
    }
    
    .stat-value {
        font-size: 1.25rem;
    }
    
    .article-title {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1rem;
    }
}