:root {
            --primary-color: #1a73e8;
            --secondary-color: #e94235;
            --dark-bg: #0f172a;
            --light-bg: #f8fafc;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --accent-color: #f59e0b;
            --border-color: #cbd5e1;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--text-primary);
            background-color: var(--light-bg);
        }
        .site-header {
            background-color: var(--dark-bg);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .my-logo span {
            color: var(--primary-color);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: #cbd5e1;
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-desktop a:hover {
            color: white;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: width 0.3s ease;
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--dark-bg);
            padding: 1rem;
            transform: translateY(-100%);
            opacity: 0;
            transition: var(--transition);
            z-index: 999;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            transform: translateY(0);
            opacity: 1;
        }
        .mobile-nav a {
            display: block;
            color: #cbd5e1;
            text-decoration: none;
            padding: 0.75rem 0;
            border-bottom: 1px solid #334155;
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            color: white;
            padding-left: 0.5rem;
        }
        .breadcrumb {
            max-width: 1200px;
            margin: 1rem auto;
            padding: 0 1.5rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .content-area {
            padding: 2rem 0;
        }
        .article-header {
            margin-bottom: 2rem;
            border-bottom: 2px solid var(--border-color);
            padding-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.5rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: var(--dark-bg);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .last-updated {
            background-color: #f0f9ff;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            color: var(--primary-color);
        }
        .article-image {
            width: 100%;
            margin: 2rem 0;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .article-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .article-image img:hover {
            transform: scale(1.02);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-secondary);
            padding: 0.5rem;
            font-size: 0.9rem;
        }
        h2, h3, h4 {
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            color: var(--dark-bg);
            line-height: 1.3;
        }
        h2 {
            font-size: 1.8rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fef3c7;
            border-left: 4px solid var(--accent-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 4px 4px 0;
        }
        .stats-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .stat-card {
            background-color: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            text-align: center;
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        .stat-label {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .pro-tip {
            background-color: #e0f2fe;
            border: 1px solid var(--primary-color);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            position: relative;
        }
        .pro-tip::before {
            content: '💡 PRO TIP';
            display: block;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
        }
        .link-list {
            background-color: #f1f5f9;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .link-list ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 0.75rem;
        }
        .link-list a {
            color: var(--primary-color);
            text-decoration: none;
            display: block;
            padding: 0.5rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .link-list a:hover {
            background-color: white;
            padding-left: 1rem;
        }
        .link-list a.active {
            background-color: var(--primary-color);
            color: white;
            font-weight: 500;
        }
        .sidebar {
            padding: 2rem 0;
        }
        .widget {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
        }
        .widget h3 {
            margin-top: 0;
            font-size: 1.2rem;
            color: var(--dark-bg);
            padding-bottom: 0.75rem;
            border-bottom: 1px solid var(--border-color);
        }
        .search-form {
            display: flex;
            margin-top: 1rem;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.25rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #1557b0;
        }
        .rating-widget .stars {
            display: flex;
            justify-content: center;
            gap: 0.25rem;
            margin: 1rem 0;
            font-size: 1.5rem;
            color: #fbbf24;
        }
        .rating-widget .stars i {
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-widget .stars i:hover {
            transform: scale(1.2);
        }
        .rating-form {
            display: none;
            margin-top: 1rem;
        }
        .rating-form.active {
            display: block;
        }
        .rating-form input, .rating-form textarea {
            width: 100%;
            padding: 0.75rem;
            margin-bottom: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
        }
        .rating-form button {
            width: 100%;
            padding: 0.75rem;
            background-color: var(--secondary-color);
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-form button:hover {
            background-color: #d32f2f;
        }
        .comment {
            border-bottom: 1px solid var(--border-color);
            padding: 1rem 0;
        }
        .comment:last-child {
            border-bottom: none;
        }
        .comment-author {
            font-weight: 700;
            color: var(--dark-bg);
        }
        .comment-date {
            color: var(--text-secondary);
            font-size: 0.8rem;
            margin-left: 0.5rem;
        }
        .comment-text {
            margin-top: 0.5rem;
        }
        .site-footer {
            background-color: var(--dark-bg);
            color: #cbd5e1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1rem;
            display: block;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .friend-link {
            background-color: #334155;
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            text-decoration: none;
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .friend-link:hover {
            background-color: var(--primary-color);
            transform: translateY(-2px);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.25rem;
        }
        .bold {
            font-weight: 700;
            color: var(--dark-bg);
        }
        @media (max-width: 768px) {
            .header-container, .breadcrumb, .main-container, .footer-container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .stats-box {
                grid-template-columns: 1fr;
            }
            .link-list ul {
                grid-template-columns: 1fr;
            }
        }