:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --bg-color: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #1e293b;
    --text-color: #334155;
    --text-light: #64748b;
    --text-white: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary-dark);
}

.site-header {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
}

.logo i {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.main-nav a {
    color: var(--text-color);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary-color);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s;
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.admin-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}

.admin-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-white);
}

.admin-btn.logout {
    background: transparent;
    border-color: #ef4444;
    color: #ef4444;
}

.admin-btn.logout:hover {
    background: #ef4444;
    color: var(--text-white);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-color);
    cursor: pointer;
}

.mobile-nav {
    display: none;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 20px;
}

.mobile-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mobile-nav a {
    display: block;
    padding: 10px 15px;
    color: var(--text-color);
    font-weight: 500;
    border-radius: var(--radius-md);
}

.mobile-nav a:hover,
.mobile-nav a.active {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.main-content {
    min-height: calc(100vh - 250px);
    padding: 40px 0;
}

.hero {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, #e0e7ff 100%);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    margin-bottom: 40px;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    color: var(--text-color);
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.search-box {
    max-width: 600px;
    margin: 30px auto 0;
    display: flex;
    gap: 10px;
}

.search-box input {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.search-box input:focus {
    border-color: var(--primary-color);
}

.search-box button {
    padding: 12px 24px;
    background: var(--primary-color);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

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

.section-title {
    font-size: 1.8rem;
    color: var(--text-color);
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--primary-color);
    display: inline-block;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.article-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.article-card .cover {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--bg-secondary);
}

.article-card .cover-placeholder {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, #c7d2fe 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 3rem;
}

.article-card .content {
    padding: 20px;
}

.article-card .category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-color);
    color: var(--text-white);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 10px;
}

.article-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    line-height: 1.4;
}

.article-card h3 a {
    color: var(--text-color);
}

.article-card h3 a:hover {
    color: var(--primary-color);
}

.article-card .excerpt {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card .meta {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.article-card .meta i {
    margin-right: 5px;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin: 40px 0;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-color);
    font-weight: 500;
    transition: all 0.2s;
}

.pagination a:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-white);
}

.pagination .current {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-white);
}

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

.category-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.category-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 25px;
    text-align: center;
    transition: all 0.3s;
}

.category-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.category-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.category-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.category-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.category-card .count {
    margin-top: 10px;
    font-size: 0.85rem;
    color: var(--primary-color);
    font-weight: 500;
}

.article-detail {
    max-width: 800px;
    margin: 0 auto;
}

.article-detail .article-header {
    margin-bottom: 30px;
}

.article-detail .category-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-color);
    color: var(--text-white);
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 15px;
}

.article-detail h1 {
    font-size: 2rem;
    color: var(--text-color);
    margin-bottom: 15px;
    line-height: 1.4;
}

.article-detail .meta {
    display: flex;
    align-items: center;
    gap: 25px;
    color: var(--text-light);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.article-detail .meta i {
    margin-right: 5px;
}

.article-detail .cover-image {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    margin-bottom: 30px;
}

.article-detail .content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
}

.article-detail .content p {
    margin-bottom: 15px;
}

.article-detail .content strong {
    color: var(--text-color);
}

.article-detail .content ul,
.article-detail .content ol {
    margin: 15px 0;
    padding-left: 25px;
}

.article-detail .content li {
    margin-bottom: 8px;
}

.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.article-nav a {
    flex: 1;
    padding: 15px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-color);
    transition: all 0.2s;
}

.article-nav a:hover {
    background: var(--primary-color);
    color: var(--text-white);
}

.article-nav .prev::before {
    content: '← ';
}

.article-nav .next::after {
    content: ' →';
}

.site-footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 40px 0 20px;
    margin-top: 60px;
}

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

.footer-disclaimer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 20px;
    background: #dc2626;
    border: none;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 500;
}

.footer-disclaimer i {
    font-size: 1.1rem;
}

.footer-links {
    margin-bottom: 15px;
}

.footer-links a {
    color: #94a3b8;
}

.footer-links a:hover {
    color: var(--text-white);
}

.footer-links .separator {
    margin: 0 10px;
    color: #475569;
}

.footer-filing {
    font-size: 0.85rem;
    color: #64748b;
}

.footer-filing p {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.footer-filing a {
    color: #64748b;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-filing a:hover {
    color: var(--text-white);
}

.about-page {
    max-width: 800px;
    margin: 0 auto;
}

.about-page h1 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--text-color);
}

.about-page .about-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 30px;
    line-height: 1.8;
}

.admin-header {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 20px 0;
    margin-bottom: 30px;
}

.admin-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.admin-header .admin-nav {
    display: flex;
    gap: 20px;
}

.admin-header .admin-nav a {
    color: #94a3b8;
    font-weight: 500;
    transition: color 0.2s;
}

.admin-header .admin-nav a:hover,
.admin-header .admin-nav a.active {
    color: var(--text-white);
}

.admin-header .user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, #e0e7ff 100%);
}

.login-box {
    background: var(--bg-color);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--text-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

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

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

.btn-danger {
    background: #ef4444;
    color: var(--text-white);
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.alert {
    padding: 12px 15px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #86efac;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fcd34d;
}

.admin-table {
    width: 100%;
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.admin-table th,
.admin-table td {
    padding: 15px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.admin-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-color);
}

.admin-table tr:last-child td {
    border-bottom: none;
}

.admin-table tr:hover td {
    background: var(--bg-secondary);
}

.admin-table .actions {
    display: flex;
    gap: 10px;
}

.admin-table .actions a {
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.status-published {
    color: #16a34a;
    font-weight: 500;
}

.status-draft {
    color: #ca8a04;
    font-weight: 500;
}

.editor-container {
    margin-bottom: 20px;
}

.editor-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    padding: 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-bottom: none;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.editor-toolbar button {
    padding: 8px 12px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.editor-toolbar button:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-white);
}

.editor-content {
    min-height: 300px;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    outline: none;
    font-size: 1rem;
    line-height: 1.6;
}

.editor-content:focus {
    border-color: var(--primary-color);
}

.file-upload {
    margin-bottom: 20px;
}

.file-upload input[type="file"] {
    padding: 10px;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    width: 100%;
    cursor: pointer;
}

.file-upload input[type="file"]:hover {
    border-color: var(--primary-color);
}

.preview-image {
    max-width: 300px;
    max-height: 200px;
    margin-top: 10px;
    border-radius: var(--radius-md);
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 25px;
    text-align: center;
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-card .number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
}

.stat-card .label {
    color: var(--text-light);
    font-size: 0.9rem;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 10px;
    color: var(--text-color);
}

.log-list {
    max-width: 900px;
}

.log-item {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 15px 20px;
    margin-bottom: 10px;
}

.log-item .log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.log-item .log-action {
    font-weight: 600;
    color: var(--text-color);
}

.log-item .log-time {
    font-size: 0.85rem;
    color: var(--text-light);
}

.log-item .log-detail {
    font-size: 0.9rem;
    color: var(--text-light);
}

.log-item .log-ip {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 5px;
}

.filter-bar {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-bar select,
.filter-bar input {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
}

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

.search-results h2 {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 20px;
}

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

    .mobile-menu-btn {
        display: block;
    }

    .mobile-nav.active {
        display: block;
    }

    .header-inner {
        height: 60px;
    }

    .hero {
        padding: 40px 20px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 1rem;
    }

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

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

    .admin-header .container {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .admin-header .admin-nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .pagination {
        flex-wrap: wrap;
    }

    .article-nav {
        flex-direction: column;
    }

    .login-box {
        margin: 20px;
        padding: 30px 20px;
    }

    .dashboard-stats {
        grid-template-columns: 1fr 1fr;
    }

    .admin-table {
        font-size: 0.85rem;
    }

    .admin-table th,
    .admin-table td {
        padding: 10px 12px;
    }
}

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

    .logo span {
        display: none;
    }

    .admin-btn span {
        display: none;
    }

    .dashboard-stats {
        grid-template-columns: 1fr;
    }

    .article-detail h1 {
        font-size: 1.5rem;
    }
}