* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #2c3e50;
            --secondary: #e74c3c;
            --accent: #3498db;
            --light: #ecf0f1;
            --dark: #1a252f;
            --text: #333;
            --text-light: #7f8c8d;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: var(--text);
            background-color: #f9f9f9;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--accent);
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        ul, ol {
            padding-left: 1.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background-color: var(--accent);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn:hover {
            background-color: var(--secondary);
            transform: translateY(-3px);
        }
        .section-padding {
            padding: 60px 0;
        }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-2 { margin-top: 2rem; }
        .highlight {
            background-color: #fffacd;
            padding: 2px 6px;
            border-radius: 4px;
        }
        .site-header {
            background-color: var(--primary);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            color: var(--secondary);
            margin-right: 10px;
        }
        .my-logo:hover {
            color: var(--light);
        }
        .nav-desktop {
            display: flex;
            gap: 25px;
        }
        @media (max-width: 992px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: white;
            font-weight: 500;
            padding: 8px 0;
            border-bottom: 2px solid transparent;
        }
        .nav-desktop a:hover {
            border-bottom-color: var(--secondary);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 992px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--dark);
            padding: 20px;
            transform: translateY(-100%);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
            box-shadow: var(--shadow);
        }
        .nav-mobile.active {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
        }
        .nav-mobile a {
            display: block;
            color: white;
            padding: 12px 0;
            border-bottom: 1px solid #34495e;
            font-size: 1.1rem;
        }
        .nav-mobile a:hover {
            color: var(--secondary);
            padding-left: 10px;
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 12px 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .separator {
            margin: 0 8px;
            color: #bbb;
        }
        .search-section {
            background: linear-gradient(135deg, var(--primary), var(--dark));
            color: white;
            padding: 40px 20px;
        }
        .search-box {
            max-width: 600px;
            margin: 0 auto;
            position: relative;
        }
        .search-box input {
            width: 100%;
            padding: 18px 25px;
            border-radius: 50px;
            border: none;
            font-size: 1.1rem;
            box-shadow: var(--shadow);
        }
        .search-box button {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            background-color: var(--secondary);
            color: white;
            border: none;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background-color: #c0392b;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 20px;
        }
        @media (max-width: 768px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            background-color: white;
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            color: var(--primary);
            border-bottom: 2px solid var(--accent);
            padding-bottom: 10px;
            margin-bottom: 20px;
        }
        .sidebar ul {
            list-style: none;
            padding-left: 0;
        }
        .sidebar li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px dashed #eee;
        }
        .sidebar a {
            color: var(--text);
            display: flex;
            align-items: center;
        }
        .sidebar a:hover {
            color: var(--accent);
        }
        .sidebar i {
            margin-right: 10px;
            color: var(--secondary);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--dark);
            margin-top: 2rem;
            margin-bottom: 0.8rem;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--text-light);
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }
        .article-meta {
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 2rem;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .intro {
            font-size: 1.2rem;
            color: var(--dark);
            background-color: #f0f8ff;
            padding: 25px;
            border-left: 5px solid var(--accent);
            border-radius: var(--border-radius);
            margin-bottom: 2.5rem;
        }
        .featured-image {
            margin: 2.5rem 0;
            text-align: center;
        }
        .featured-image figcaption {
            font-style: italic;
            color: var(--text-light);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .content-section p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .content-section ul, .content-section ol {
            margin-bottom: 1.5rem;
            padding-left: 2rem;
        }
        .content-section li {
            margin-bottom: 0.8rem;
        }
        blockquote {
            border-left: 4px solid var(--secondary);
            padding-left: 25px;
            margin: 2rem 0;
            font-style: italic;
            color: var(--text-light);
            background-color: #f9f9f9;
            padding: 25px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .strategy-box {
            background: linear-gradient(to right bottom, #e3f2fd, #f3e5f5);
            padding: 25px;
            border-radius: var(--border-radius);
            border: 1px solid #d1c4e9;
            margin: 2rem 0;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: 0 0 10px rgba(0,0,0,0.05);
        }
        .data-table th, .data-table td {
            border: 1px solid #ddd;
            padding: 15px;
            text-align: left;
        }
        .data-table th {
            background-color: var(--primary);
            color: white;
        }
        .data-table tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        .interactive-section {
            background-color: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-top: 40px;
        }
        .rating-box {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 30px;
            padding: 20px;
            background-color: #fff8e1;
            border-radius: var(--border-radius);
        }
        .stars {
            display: flex;
            gap: 5px;
        }
        .stars i {
            color: #ffc107;
            font-size: 1.8rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .form-group {
            margin-bottom: 25px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        @media (max-width: 576px) {
            .form-row {
                grid-template-columns: 1fr;
            }
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 20px 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-column h4 {
            color: white;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 12px;
            margin-bottom: 25px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #bdc3c7;
            display: flex;
            align-items: center;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .footer-links i {
            margin-right: 10px;
            width: 20px;
        }
        friend-link {
            display: block;
            background-color: #2c3e50;
            padding: 15px;
            border-radius: var(--border-radius);
            margin: 20px 0;
            text-align: center;
        }
        friend-link a {
            color: #3498db;
            font-weight: bold;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #34495e;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        .last-updated {
            background-color: #e8f4fc;
            padding: 15px;
            border-radius: var(--border-radius);
            margin-top: 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }
        .last-updated span {
            font-weight: 600;
            color: var(--primary);
        }