:root {
            --primary-color: #4a1c8c;
            --secondary-color: #ff6b35;
            --accent-color: #00b5b5;
            --text-dark: #2d2d2d;
            --text-light: #f5f5f5;
            --bg-light: #f9f7ff;
            --bg-card: #ffffff;
            --shadow: 0 4px 12px rgba(74, 28, 140, 0.1);
            --radius: 12px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-color), #2d0c5e);
            color: var(--text-light);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffd166;
            text-decoration: none;
            letter-spacing: 1px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            transition: var(--transition);
        }
        .logo a:hover {
            color: var(--secondary-color);
            transform: scale(1.03);
        }
        .logo span {
            color: var(--accent-color);
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
        }
        .nav-link {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 3px;
            background: var(--secondary-color);
            transition: var(--transition);
            transform: translateX(-50%);
        }
        .nav-link:hover::after {
            width: 80%;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--primary-color);
            padding: 1.5rem;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            z-index: 999;
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav .nav-link {
            padding: 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .mobile-nav .nav-link:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            background-color: #e9e1ff;
            padding: 1rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .breadcrumb i {
            margin: 0 0.5rem;
            color: #888;
        }
        .search-section {
            background: linear-gradient(to right, #6a11cb, #2575fc);
            padding: 2.5rem 0;
            text-align: center;
            color: white;
        }
        .search-title {
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
        }
        .search-form {
            max-width: 700px;
            margin: 0 auto;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0,0,0,0.2);
        }
        .search-input {
            flex: 1;
            padding: 1.2rem 1.8rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 2.5rem;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #e55a2b;
        }
        .main-content {
            padding: 3rem 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 3px dashed var(--accent-color);
        }
        .article-title {
            font-size: 3.2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            .article-title {
                font-size: 2.5rem;
            }
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 2rem;
            color: #666;
            font-size: 0.95rem;
            margin-top: 1.5rem;
            flex-wrap: wrap;
        }
        .meta-item i {
            margin-right: 0.5rem;
            color: var(--accent-color);
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background-color: var(--bg-card);
            border-radius: var(--radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        .toc {
            background: linear-gradient(145deg, #f0ebff, #ffffff);
            border-radius: var(--radius);
            padding: 2rem;
            margin-bottom: 2.5rem;
            border-left: 5px solid var(--secondary-color);
            box-shadow: var(--shadow);
        }
        .toc-title {
            color: var(--primary-color);
            margin-bottom: 1.2rem;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .toc-list {
            list-style-type: none;
        }
        .toc-item {
            margin-bottom: 0.8rem;
            position: relative;
            padding-left: 1.5rem;
        }
        .toc-item::before {
            content: '▶';
            color: var(--accent-color);
            position: absolute;
            left: 0;
            font-size: 0.8rem;
        }
        .toc-link {
            color: var(--text-dark);
            text-decoration: none;
            transition: var(--transition);
        }
        .toc-link:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .section {
            margin-bottom: 3.5rem;
            scroll-margin-top: 2rem;
        }
        .section-title {
            font-size: 2.2rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid #eee;
            position: relative;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 120px;
            height: 2px;
            background: var(--secondary-color);
        }
        .subsection {
            margin-bottom: 2.5rem;
        }
        .subsection-title {
            font-size: 1.7rem;
            color: #3a3a8c;
            margin: 2rem 0 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .subsection-title i {
            color: var(--accent-color);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 4px solid #ffc107;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        .highlight-title {
            color: #b85c00;
            font-weight: 700;
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .tip-box {
            background-color: #e8f7ff;
            border-left: 4px solid #2196F3;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .warning-box {
            background-color: #ffeaea;
            border-left: 4px solid #f44336;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .image-container {
            margin: 2.5rem 0;
            text-align: center;
        }
        .article-img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            transition: var(--transition);
        }
        .article-img:hover {
            transform: scale(1.01);
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
        }
        .img-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        ul, ol {
            margin: 1.5rem 0 1.5rem 2rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: white;
            padding: 1.8rem;
            border-radius: var(--radius);
            text-align: center;
            box-shadow: var(--shadow);
            border-top: 5px solid var(--accent-color);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.12);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .stat-label {
            color: #666;
            font-size: 1.1rem;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2.5rem 0;
            box-shadow: var(--shadow);
            border-radius: var(--radius);
            overflow: hidden;
        }
        .comparison-table th {
            background-color: var(--primary-color);
            color: white;
            padding: 1.2rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        .comparison-table td {
            padding: 1rem;
            border-bottom: 1px solid #eee;
        }
        .comparison-table tr:nth-child(even) {
            background-color: #f9f9ff;
        }
        .comparison-table tr:hover {
            background-color: #f0f0ff;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        @media (max-width: 992px) {
            .sidebar {
                display: grid;
                grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
                gap: 2rem;
            }
        }
        .sidebar-widget {
            background-color: var(--bg-card);
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid #eee;
        }
        .widget-title i {
            color: var(--accent-color);
        }
        .popular-guides {
            list-style-type: none;
        }
        .guide-item {
            margin-bottom: 1.2rem;
            padding-bottom: 1.2rem;
            border-bottom: 1px dashed #ddd;
        }
        .guide-item:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        .guide-link {
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 500;
            display: block;
            transition: var(--transition);
            padding: 0.5rem 0;
        }
        .guide-link:hover {
            color: var(--secondary-color);
            padding-left: 0.8rem;
        }
        .guide-link::before {
            content: '🔥';
            margin-right: 0.8rem;
        }
        .download-box {
            background: linear-gradient(145deg, var(--primary-color), #3a1470);
            color: white;
            text-align: center;
            padding: 2.5rem 2rem;
            border-radius: var(--radius);
        }
        .download-title {
            font-size: 1.8rem;
            margin-bottom: 1rem;
        }
        .download-btn {
            display: inline-block;
            background-color: var(--secondary-color);
            color: white;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            font-size: 1.1rem;
            margin-top: 1.5rem;
            transition: var(--transition);
            box-shadow: 0 6px 15px rgba(255, 107, 53, 0.3);
        }
        .download-btn:hover {
            background-color: #e55a2b;
            transform: translateY(-4px);
            box-shadow: 0 10px 20px rgba(255, 107, 53, 0.4);
        }
        .user-interaction {
            background-color: var(--bg-card);
            border-radius: var(--radius);
            padding: 3rem;
            margin-top: 3rem;
            box-shadow: var(--shadow);
        }
        .interaction-title {
            text-align: center;
            color: var(--primary-color);
            margin-bottom: 2.5rem;
            font-size: 2rem;
        }
        .rating-section {
            text-align: center;
            margin-bottom: 3rem;
            padding-bottom: 2.5rem;
            border-bottom: 2px solid #eee;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1.5rem 0;
        }
        .star {
            font-size: 2.5rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .rating-label {
            font-size: 1.2rem;
            color: #666;
            margin-top: 1rem;
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-label {
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--primary-color);
        }
        .form-input,
        .form-textarea {
            padding: 1rem 1.2rem;
            border: 2px solid #ddd;
            border-radius: var(--radius);
            font-size: 1rem;
            font-family: inherit;
            transition: var(--transition);
        }
        .form-input:focus,
        .form-textarea:focus {
            outline: none;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(0, 181, 181, 0.2);
        }
        .form-textarea {
            min-height: 180px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 1.2rem 2.5rem;
            border-radius: var(--radius);
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-btn:hover {
            background-color: #3a1470;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(74, 28, 140, 0.3);
        }
        .footer-links {
            background-color: #2d0c5e;
            padding: 3.5rem 0;
            color: white;
        }
        .footer-links .container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.08);
            border-radius: var(--radius);
            padding: 1.5rem;
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-5px);
        }
        .web-link a {
            color: #ffd166;
            text-decoration: none;
            font-size: 1.1rem;
            font-weight: 500;
            display: block;
            transition: var(--transition);
        }
        .web-link a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .web-link a::before {
            content: '🔗';
            margin-right: 0.8rem;
        }
        .site-footer {
            background-color: #1a0a35;
            color: #bbb;
            padding: 3rem 0 2rem;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2rem;
        }
        .footer-logo {
            font-size: 2.5rem;
            font-weight: 800;
            color: #ffd166;
            text-decoration: none;
        }
        .footer-links-nav {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-link {
            color: #bbb;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-link:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .copyright {
            font-size: 0.95rem;
            color: #888;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            width: 100%;
        }
        .copyright a {
            color: var(--accent-color);
            text-decoration: none;
        }
        .copyright a:hover {
            text-decoration: underline;
        }
        @media (max-width: 768px) {
            .article-body {
                padding: 1.8rem;
            }
            .section-title {
                font-size: 1.9rem;
            }
            .subsection-title {
                font-size: 1.5rem;
            }
            .user-interaction {
                padding: 2rem;
            }
            .stars {
                gap: 0.3rem;
            }
            .star {
                font-size: 2rem;
            }
            .search-form {
                flex-direction: column;
                border-radius: var(--radius);
            }
            .search-input,
            .search-btn {
                width: 100%;
                border-radius: 0;
                padding: 1.2rem;
            }
            .search-btn {
                border-radius: 0 0 var(--radius) var(--radius);
            }
        }
        @media (max-width: 480px) {
            .article-title {
                font-size: 2rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .comparison-table {
                display: block;
                overflow-x: auto;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.8s ease forwards;
        }
        .stagger-delay-1 { animation-delay: 0.1s; }
        .stagger-delay-2 { animation-delay: 0.2s; }
        .stagger-delay-3 { animation-delay: 0.3s; }
        .stagger-delay-4 { animation-delay: 0.4s; }