:root {
            --primary: #4a1fb8;
            --secondary: #ff9f00;
            --accent: #ea4335;
            --light: #f8f9fa;
            --dark: #2d1b69;
            --text: #333333;
            --text-light: #666666;
            --border: #e0e0e0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background-color: #fff;
            overflow-x: hidden;
        }
        .header {
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo {
            font-size: 2rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .logo span {
            background: linear-gradient(to right, var(--secondary), #ffcc80);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .nav {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--secondary);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--secondary);
            transition: width 0.3s ease;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 5px;
            background: none;
            border: none;
            padding: 5px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: white;
            border-radius: 2px;
            transition: var(--transition);
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: var(--light);
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb-list {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--text-light);
        }
        .breadcrumb-item a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb-item a:hover {
            text-decoration: underline;
        }
        .main {
            padding: 3rem 0;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article {
            background: white;
            border-radius: var(--radius);
            overflow: hidden;
        }
        .article-header {
            margin-bottom: 2.5rem;
        }
        .article-title {
            font-size: 2.8rem;
            color: var(--dark);
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border);
        }
        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .featured-image {
            width: 100%;
            height: 400px;
            object-fit: cover;
            border-radius: var(--radius);
            margin-bottom: 2.5rem;
            box-shadow: var(--shadow);
            transition: transform 0.5s ease;
        }
        .featured-image:hover {
            transform: scale(1.01);
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .section-title {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            padding-bottom: 0.75rem;
            border-bottom: 3px solid var(--secondary);
        }
        .subsection-title {
            font-size: 1.5rem;
            color: var(--dark);
            margin: 2rem 0 1rem 0;
        }
        .paragraph {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(255, 159, 0, 0.1);
            border-left: 4px solid var(--secondary);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .tip {
            background-color: rgba(74, 31, 184, 0.05);
            border: 1px solid var(--border);
            padding: 1.5rem;
            border-radius: var(--radius);
            margin: 2rem 0;
        }
        .tip-title {
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .interactive-features {
            background-color: var(--light);
            padding: 2.5rem;
            border-radius: var(--radius);
            margin: 3rem 0;
            box-shadow: var(--shadow);
        }
        .feature-title {
            text-align: center;
            margin-bottom: 2rem;
            color: var(--dark);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .feature-card {
            background: white;
            padding: 2rem;
            border-radius: var(--radius);
            text-align: center;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark);
        }
        .form-input, .form-textarea, .form-select {
            width: 100%;
            padding: 0.875rem 1rem;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus, .form-select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(74, 31, 184, 0.1);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.875rem 2rem;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn:hover {
            background: var(--dark);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: var(--secondary);
        }
        .btn-secondary:hover {
            background: #e68900;
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .star {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: var(--secondary);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.4rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid var(--secondary);
        }
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            list-style: none;
        }
        .tag {
            background: var(--light);
            padding: 0.5rem 1rem;
            border-radius: 50px;
            font-size: 0.9rem;
            text-decoration: none;
            color: var(--text);
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: white;
        }
        .related-list {
            list-style: none;
        }
        .related-item {
            padding: 1rem 0;
            border-bottom: 1px solid var(--border);
        }
        .related-item:last-child {
            border-bottom: none;
        }
        .related-link {
            text-decoration: none;
            color: var(--text);
            display: block;
            transition: var(--transition);
        }
        .related-link:hover {
            color: var(--primary);
        }
        .web-links {
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
            padding: 3rem 0;
            color: white;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.1);
            padding: 1.5rem;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-5px);
        }
        .web-link a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .web-link a:hover {
            color: var(--secondary);
        }
        .footer {
            background-color: #1a0b3d;
            color: #ccc;
            padding: 3rem 0 1.5rem;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .footer-copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }
            .nav {
                width: 100%;
                display: none;
            }
            .nav.active {
                display: block;
            }
            .nav-list {
                flex-direction: column;
                gap: 0;
                width: 100%;
            }
            .nav-item {
                width: 100%;
            }
            .nav-link {
                display: block;
                padding: 1rem 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .hamburger {
                display: flex;
                position: absolute;
                top: 1.5rem;
                right: 20px;
            }
            .hamburger.active span:nth-child(1) {
                transform: rotate(45deg) translate(6px, 6px);
            }
            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }
            .hamburger.active span:nth-child(3) {
                transform: rotate(-45deg) translate(6px, -6px);
            }
            .article-title {
                font-size: 2.2rem;
            }
            .featured-image {
                height: 250px;
            }
            .interactive-features {
                padding: 1.5rem;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }
        .text-center {
            text-align: center;
        }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-3 { margin-top: 3rem; }
        .emoji { font-size: 1.2em; }
        .bold { font-weight: 700; color: var(--dark); }
        .keyword { background-color: rgba(255, 159, 0, 0.15); padding: 0.2rem 0.4rem; border-radius: 4px; }