:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-sm: 8px;
}

* {
    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-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background: linear-gradient(135deg, var(--card-bg) 0%, #2d3748 100%);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo h1 {
    font-size: 1.8rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.logo .site-url {
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.logo .site-slogan {
    color: var(--text-secondary);
    font-size: 0.9rem;
    max-width: 500px;
    margin-bottom: 10px;
}

.site-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.badge {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(16, 185, 129, 0.2));
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 10px;
}

.nav-link {
    display: block;
    padding: 10px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all 0.3s;
    font-weight: 500;
}

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

.main {
    padding: 30px 0;
}

.search-section {
    margin-bottom: 30px;
}

.search-box {
    display: flex;
    gap: 10px;
    max-width: 600px;
    margin: 0 auto 15px;
}

.search-input {
    flex: 1;
    padding: 14px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--card-bg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-btn {
    padding: 14px 30px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: background 0.3s;
    min-height: 44px;
}

.search-btn:hover {
    background: var(--primary-dark);
}

.hot-keywords {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.hot-keywords span {
    display: inline-block;
    margin: 3px;
    padding: 4px 12px;
    background: var(--card-bg);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
}

.hot-keywords span:hover {
    background: var(--primary-color);
    color: white;
}

.filter-section {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    padding: 20px;
    background: var(--card-bg);
    border-radius: var(--radius);
    margin-bottom: 30px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-group label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.filter-select {
    padding: 8px 15px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    min-height: 36px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    font-size: 0.875rem;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.favorites-btn {
    padding: 8px 16px;
    background: var(--warning-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.875rem;
    transition: opacity 0.3s;
    min-height: 36px;
}

.favorites-btn:hover {
    opacity: 0.9;
}

.updates-section {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(16, 185, 129, 0.1));
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 30px;
}

.updates-section h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* AI热点新闻样式 */
.news-section {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(239, 68, 68, 0.1));
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 30px;
}

.news-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.news-header h2 {
    color: var(--warning-color);
    font-size: 1.5rem;
}

.news-update-time {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

.news-card {
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    padding: 15px;
    border-left: 4px solid var(--warning-color);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}

.news-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.news-card.hot {
    border-left-color: var(--danger-color);
    background: linear-gradient(135deg, var(--card-bg), rgba(239, 68, 68, 0.1));
}

.news-card-title {
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-summary {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.news-card-source {
    background: var(--bg-color);
    padding: 2px 8px;
    border-radius: 4px;
}

.news-card-hot {
    color: var(--danger-color);
    font-weight: 600;
}

@media (max-width: 768px) {
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .news-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

#recentUpdates {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.update-item {
    padding: 8px 15px;
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

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

.section-header h2 {
    font-size: 1.5rem;
}

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

.entries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.entry-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.entry-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.entry-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.entry-title {
    font-size: 1.125rem;
    font-weight: 600;
}

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

.entry-title a:hover {
    text-decoration: underline;
}

.entry-badges {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-verified {
    background: var(--secondary-color);
    color: white;
}

.badge-free {
    background: var(--primary-color);
    color: white;
}

.badge-expired {
    background: var(--danger-color);
    color: white;
}

.badge-suspected {
    background: var(--warning-color);
    color: white;
}

.entry-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.entry-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.entry-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 15px;
    line-height: 1.6;
}

.entry-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.tag {
    padding: 4px 10px;
    background: var(--bg-color);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s;
}

.tag:hover {
    background: var(--primary-color);
    color: white;
}

.entry-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.action-btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s;
    min-height: 36px;
}

.btn-vote {
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-vote:hover,
.btn-vote.voted {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn-comment {
    background: var(--bg-color);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-comment:hover {
    background: var(--border-color);
}

.btn-report {
    background: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.btn-report:hover {
    background: var(--danger-color);
    color: white;
}

.btn-favorite {
    background: transparent;
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
    padding: 8px 12px;
}

.btn-favorite:hover,
.btn-favorite.active {
    background: var(--warning-color);
    color: white;
}

.entry-comments {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.comment-item {
    padding: 10px 0;
    font-size: 0.875rem;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
}

.comment-author {
    font-weight: 500;
    color: var(--text-primary);
}

.comment-date {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.comment-text {
    color: var(--text-secondary);
}

.comment-rating {
    color: var(--warning-color);
}

.loading {
    text-align: center;
    padding: 60px;
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.empty-state {
    text-align: center;
    padding: 60px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.page-btn {
    padding: 10px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s;
    min-height: 44px;
    min-width: 44px;
}

.page-btn:hover,
.page-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 30px;
    max-width: 500px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.close-btn:hover {
    color: var(--text-primary);
}

.modal h3 {
    margin-bottom: 20px;
}

#commentForm input,
#commentForm textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
}

#commentForm textarea {
    min-height: 100px;
    resize: vertical;
}

.rating-input {
    margin-bottom: 15px;
}

.stars {
    display: inline-flex;
    gap: 5px;
    font-size: 1.5rem;
    color: var(--border-color);
    cursor: pointer;
}

.stars span {
    transition: color 0.2s;
}

.stars span.active,
.stars span:hover {
    color: var(--warning-color);
}

#commentForm button[type="submit"] {
    width: 100%;
    padding: 14px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: background 0.3s;
    min-height: 44px;
}

#commentForm button[type="submit"]:hover {
    background: var(--primary-dark);
}

.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--card-bg);
    color: var(--text-primary);
    padding: 15px 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    opacity: 0;
    transition: all 0.3s;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    border-left: 4px solid var(--secondary-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.footer {
    background: linear-gradient(135deg, #1a1f2e 0%, var(--card-bg) 100%);
    border-top: 1px solid var(--border-color);
    padding: 40px 0 20px;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 30px;
    text-align: left;
}

.footer-section h3,
.footer-section h4 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.footer-section h3 {
    font-size: 1.3rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-url {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 10px;
}

.footer-section p {
    line-height: 1.8;
    margin-bottom: 15px;
}

.footer-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-keywords span {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-color);
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
}

.footer-categories ul {
    list-style: none;
}

.footer-categories li {
    margin-bottom: 10px;
}

.footer-categories a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

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

.qrcode-box {
    background: white;
    padding: 15px;
    border-radius: var(--radius-sm);
    display: inline-block;
}

.qrcode-box img {
    display: block;
}

.qrcode-tip {
    margin-top: 10px;
    color: var(--text-primary);
    font-size: 0.8rem;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    margin: 5px 0;
}

.footer-links {
    margin-top: 10px;
}

.footer-links a {
    color: var(--primary-color);
    text-decoration: none;
    margin: 0 5px;
}

.footer-links span {
    color: var(--border-color);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .footer-keywords {
        justify-content: center;
    }
    
    .footer-categories ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    
    .footer-categories li {
        margin-bottom: 0;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        align-items: stretch;
    }

    .nav-toggle {
        display: flex;
        position: absolute;
        top: 20px;
        right: 20px;
    }

    .nav-list {
        display: none;
        flex-direction: column;
        width: 100%;
        margin-top: 15px;
    }

    .nav-list.active {
        display: flex;
    }

    .nav-link {
        text-align: center;
    }

    .search-box {
        flex-direction: column;
    }

    .filter-section {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group {
        flex-wrap: wrap;
    }

    .entries-grid {
        grid-template-columns: 1fr;
    }

    .entry-actions {
        justify-content: stretch;
    }

    .action-btn {
        flex: 1;
        justify-content: center;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .entry-card {
        padding: 15px;
    }

    .entry-header {
        flex-direction: column;
        gap: 10px;
    }

    .entry-meta {
        flex-direction: column;
        gap: 5px;
    }
}