:root {
            --primary: #4a2cd6;
            --secondary: #ffcc00;
            --accent: #e91e63;
            --dark: #1a1a2e;
            --light: #f8f9fa;
            --gray: #6c757d;
            --success: #28a745;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 12px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f0f2f5;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--dark), var(--primary));
            color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .logo span {
            background: linear-gradient(to right, var(--secondary), #ffeb3b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .desktop-nav {
            display: flex;
            gap: 30px;
        }
        .desktop-nav a {
            font-weight: 600;
            padding: 8px 16px;
            border-radius: 30px;
            transition: var(--transition);
        }
        .desktop-nav a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--secondary);
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--dark);
            padding: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            animation: slideDown 0.3s ease;
        }
        @keyframes slideDown {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            padding: 15px 0;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            font-weight: 600;
        }
        .mobile-nav a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            background-color: rgba(255,255,255,0.05);
            padding: 12px 0;
            font-size: 0.9rem;
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        .breadcrumb span {
            margin: 0 8px;
            color: var(--gray);
        }
        main {
            padding: 40px 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-content {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 40px;
            box-shadow: var(--shadow);
        }
        h1 {
            color: var(--dark);
            font-size: 2.8rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            gap: 20px;
            margin-bottom: 30px;
            color: var(--gray);
            font-size: 0.95rem;
            flex-wrap: wrap;
        }
        .article-meta span i {
            margin-right: 5px;
            color: var(--primary);
        }
        h2 {
            color: var(--primary);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--secondary);
            font-size: 2rem;
        }
        h3 {
            color: var(--dark);
            margin: 30px 0 15px;
            font-size: 1.6rem;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 5px solid var(--secondary);
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .highlight p {
            margin-bottom: 0;
            font-weight: 600;
            color: #664d03;
        }
        .feature-img {
            width: 100%;
            border-radius: var(--border-radius);
            margin: 30px 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .feature-img:hover {
            transform: scale(1.005);
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }
        .stats-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 40px 0;
        }
        .stat-card {
            background: linear-gradient(145deg, #ffffff, #e6e9ef);
            border-radius: var(--border-radius);
            padding: 25px;
            text-align: center;
            box-shadow: var(--shadow);
            border-top: 5px solid var(--primary);
        }
        .stat-card i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .stat-card h4 {
            font-size: 2rem;
            color: var(--dark);
            margin-bottom: 5px;
        }
        .tip-box {
            background-color: #e7f5ff;
            border-radius: var(--border-radius);
            padding: 20px;
            margin: 25px 0;
            border: 1px dashed var(--primary);
        }
        .tip-box h4 {
            color: var(--primary);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        aside {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-top: 0;
            padding-bottom: 15px;
            border-bottom: 2px solid var(--light);
        }
        .search-box form {
            display: flex;
        }
        .search-box input {
            flex: 1;
            padding: 15px;
            border: 2px solid #ddd;
            border-right: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-box button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-box button:hover {
            background-color: #3a1fc9;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #ffcc00;
            margin: 15px 0;
            cursor: pointer;
        }
        .stars i {
            transition: var(--transition);
        }
        .stars i:hover, .stars i.active {
            transform: scale(1.2);
        }
        .rating-form button {
            background-color: var(--success);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            margin-top: 15px;
            transition: var(--transition);
            width: 100%;
        }
        .rating-form button:hover {
            background-color: #218838;
            transform: translateY(-3px);
        }
        .comment-widget textarea {
            width: 100%;
            height: 150px;
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            resize: vertical;
            margin-bottom: 15px;
        }
        .comment-widget button {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            width: 100%;
        }
        .comment-widget button:hover {
            background-color: #d81b60;
            transform: translateY(-3px);
        }
        .longtail-links {
            background-color: white;
            padding: 40px 0;
            margin-top: 40px;
        }
        .web-link {
            display: inline-block;
            background: linear-gradient(to right, #f8f9fa, #e9ecef);
            margin: 10px 15px 10px 0;
            padding: 12px 25px;
            border-radius: 30px;
            border: 1px solid #dee2e6;
            transition: var(--transition);
        }
        .web-link:hover {
            background: linear-gradient(to right, var(--primary), #6a4bff);
            color: white;
            transform: translateY(-3px);
            border-color: var(--primary);
        }
        footer {
            background-color: var(--dark);
            color: #adb5bd;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 20px;
            color: white;
        }
        .footer-links a {
            display: block;
            margin-bottom: 12px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 2.3rem;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .header-top {
                padding: 12px 0;
            }
            .article-content {
                padding: 25px;
            }
            .stats-box {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 576px) {
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 10px;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
        }
        .fade-in {
            animation: fadeIn 1s ease;
        }
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(74, 44, 214, 0.5); }
            70% { box-shadow: 0 0 0 10px rgba(74, 44, 214, 0); }
            100% { box-shadow: 0 0 0 0 rgba(74, 44, 214, 0); }
        }