* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        header {
            background: linear-gradient(135deg, #1a2a3a 0%, #2c3e50 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 20px;
        }
        .logo a {
            color: #fff;
            text-decoration: none;
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
        }
        .logo i {
            color: #f1c40f;
            margin-right: 10px;
        }
        nav.desktop-nav ul {
            display: flex;
            list-style: none;
        }
        nav.desktop-nav ul li {
            margin-left: 2rem;
        }
        nav.desktop-nav ul li a {
            color: #ecf0f1;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0;
            transition: color 0.3s ease;
            border-bottom: 2px solid transparent;
        }
        nav.desktop-nav ul li a:hover,
        nav.desktop-nav ul li a.active {
            color: #f1c40f;
            border-bottom-color: #f1c40f;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            background-color: #2c3e50;
            flex-direction: column;
            padding: 1rem;
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav ul {
            list-style: none;
            width: 100%;
        }
        .mobile-nav ul li {
            margin: 0.8rem 0;
        }
        .mobile-nav ul li a {
            color: #ecf0f1;
            text-decoration: none;
            font-weight: 600;
            display: block;
            padding: 0.5rem;
            border-radius: 5px;
            transition: background 0.3s;
        }
        .mobile-nav ul li a:hover {
            background-color: #34495e;
        }
        .breadcrumb {
            background-color: #e8f4fc;
            padding: 0.8rem 20px;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #2980b9;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: #7f8c8d;
        }
        main {
            padding: 2rem 0;
            background-color: #fff;
            box-shadow: 0 0 15px rgba(0,0,0,0.05);
            border-radius: 8px;
            margin: 1.5rem auto;
        }
        .article-header {
            text-align: center;
            padding: 2rem 20px;
            border-bottom: 1px solid #eee;
        }
        .article-header h1 {
            font-size: 2.8rem;
            color: #2c3e50;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .meta-info {
            color: #7f8c8d;
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .meta-info span i {
            margin-right: 5px;
        }
        .content {
            padding: 2rem 20px;
        }
        .content h2 {
            color: #1a2a3a;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #f1c40f;
            font-size: 2rem;
        }
        .content h3 {
            color: #2c3e50;
            margin: 1.8rem 0 1rem;
            font-size: 1.6rem;
        }
        .content p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .content strong {
            color: #e74c3c;
            font-weight: 700;
        }
        .content em {
            background-color: #fffde7;
            padding: 0 3px;
            font-style: italic;
        }
        .content blockquote {
            border-left: 4px solid #3498db;
            background-color: #f8f9fa;
            padding: 1.5rem;
            margin: 2rem 0;
            font-size: 1.2rem;
            color: #2c3e50;
        }
        .content ul, .content ol {
            margin: 1.5rem 0 1.5rem 2rem;
        }
        .content li {
            margin-bottom: 0.8rem;
        }
        .image-wrapper {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
            border: 1px solid #ddd;
            padding: 10px;
            border-radius: 8px;
            background-color: #f9f9f9;
        }
        .image-wrapper img {
            border-radius: 4px;
        }
        .image-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .strategy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 2rem 0;
        }
        .strategy-card {
            background: #f8f9fa;
            border: 1px solid #e9ecef;
            border-radius: 8px;
            padding: 1.5rem;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .strategy-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .strategy-card h4 {
            color: #2980b9;
            margin-bottom: 0.8rem;
        }
        .interactive-section {
            background-color: #f0f8ff;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            border-left: 5px solid #3498db;
        }
        .interactive-section h3 {
            color: #2c3e50;
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #2c3e50;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #bdc3c7;
            border-radius: 5px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 5px rgba(52, 152, 219, 0.5);
        }
        .btn {
            background: #3498db;
            color: white;
            border: none;
            padding: 0.8rem 1.8rem;
            border-radius: 5px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        .btn:hover {
            background: #2980b9;
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin: 1rem 0;
        }
        .rating-stars {
            display: flex;
            font-size: 1.8rem;
            color: #ddd;
        }
        .rating-stars .star {
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars .star.active,
        .rating-stars .star:hover {
            color: #f1c40f;
        }
        .longtail-links {
            background-color: #2c3e50;
            padding: 3rem 20px;
            margin-top: 3rem;
        }
        .longtail-links h3 {
            color: #ecf0f1;
            text-align: center;
            margin-bottom: 2rem;
            font-size: 1.8rem;
        }
        .links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background-color: #34495e;
            border-radius: 6px;
            padding: 1.2rem;
            transition: background 0.3s;
        }
        .web-link:hover {
            background-color: #3d566e;
        }
        .web-link a {
            color: #ecf0f1;
            text-decoration: none;
            font-size: 1.05rem;
            display: block;
        }
        .web-link a:hover {
            color: #f1c40f;
            text-decoration: underline;
        }
        footer {
            background-color: #1a2a3a;
            color: #bdc3c7;
            padding: 2rem 20px;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .copyright {
            margin-top: 1.5rem;
            font-size: 0.9rem;
            border-top: 1px solid #34495e;
            padding-top: 1.5rem;
            width: 100%;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .content h2 {
                font-size: 1.8rem;
            }
            .content h3 {
                font-size: 1.5rem;
            }
            .strategy-grid {
                grid-template-columns: 1fr;
            }
            .links-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .links-container {
                grid-template-columns: 1fr;
            }
            .rating-stars {
                font-size: 1.5rem;
            }
        }