:root {
            --primary-color: #ff6b35;
            --secondary-color: #1a73e8;
            --dark-color: #202124;
            --light-color: #f8f9fa;
            --text-color: #333;
            --text-light: #5f6368;
            --border-color: #dadce0;
            --success-color: #34a853;
            --warning-color: #fbbc04;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --container-width: 1200px;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        .site-header {
            background-color: #fff;
            box-shadow: 0 2px 10px 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: var(--spacing-sm) 0;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo .fa-burst {
            color: var(--secondary-color);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
        }
        .main-nav a {
            font-weight: 600;
            color: var(--dark-color);
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--primary-color);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--dark-color);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: var(--spacing-sm) 0;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 0.5rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .breadcrumb .current {
            color: var(--primary-color);
            font-weight: 600;
        }
        .search-section {
            background: linear-gradient(135deg, var(--secondary-color), #0d47a1);
            padding: var(--spacing-md) 0;
            margin-bottom: var(--spacing-lg);
        }
        .search-container {
            max-width: 800px;
            margin: 0 auto;
        }
        .search-box {
            display: flex;
            background: white;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .search-box input {
            flex: 1;
            padding: 1.2rem var(--spacing-md);
            border: none;
            outline: none;
            font-size: 1.1rem;
        }
        .search-box button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 2.5rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-box button:hover {
            background-color: #e55a2b;
        }
        .main-content {
            padding: var(--spacing-lg) 0;
        }
        .article-header {
            margin-bottom: var(--spacing-lg);
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: var(--dark-color);
            margin-bottom: var(--spacing-sm);
        }
        .meta-info {
            display: flex;
            gap: var(--spacing-md);
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: var(--spacing-sm);
        }
        .meta-info i {
            margin-right: 0.5rem;
        }
        .content-body {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
        }
        @media (max-width: 992px) {
            .content-body {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            font-size: 1.1rem;
        }
        .article-content section {
            margin-bottom: var(--spacing-lg);
        }
        .article-content h2 {
            font-size: 2rem;
            color: var(--dark-color);
            margin: var(--spacing-md) 0 var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--primary-color);
        }
        .article-content h3 {
            font-size: 1.6rem;
            color: var(--secondary-color);
            margin: var(--spacing-sm) 0;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-content ul, .article-content ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        .article-content li {
            margin-bottom: 0.8rem;
        }
        .highlight-box {
            background-color: #e8f0fe;
            border-left: 5px solid var(--secondary-color);
            padding: var(--spacing-md);
            margin: var(--spacing-md) 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .feature-img {
            width: 100%;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: var(--spacing-md) 0;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .pro-tip {
            background-color: #fff8e1;
            border: 1px dashed var(--warning-color);
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin: var(--spacing-md) 0;
        }
        .pro-tip h4 {
            color: var(--warning-color);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .key-term {
            font-weight: 700;
            color: var(--primary-color);
        }
        .sidebar {
            position: sticky;
            top: 120px;
            height: fit-content;
        }
        .sidebar-widget {
            background-color: var(--light-color);
            border-radius: var(--border-radius);
            padding: var(--spacing-md);
            margin-bottom: var(--spacing-md);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--dark-color);
            margin-bottom: var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        .toc ul {
            list-style: none;
            margin-left: 0;
        }
        .toc li {
            margin-bottom: 0.8rem;
        }
        .toc a {
            display: block;
            padding: 0.5rem;
            border-radius: 4px;
        }
        .toc a:hover {
            background-color: rgba(26, 115, 232, 0.1);
        }
        .quick-links ul {
            list-style: none;
        }
        .quick-links li {
            margin-bottom: 0.8rem;
        }
        .quick-links a {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .interactive-section {
            background-color: #f5f5f5;
            border-radius: var(--border-radius);
            padding: var(--spacing-lg);
            margin: var(--spacing-lg) 0;
        }
        .rating-widget {
            text-align: center;
            margin-bottom: var(--spacing-md);
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--warning-color);
        }
        .rating-form,
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        .btn:hover {
            background-color: #e55a2b;
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(255, 107, 53, 0.3);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
        }
        .btn-secondary:hover {
            background-color: #0b5ed7;
            box-shadow: 0 6px 12px rgba(26, 115, 232, 0.3);
        }
        .long-tail-links {
            background-color: var(--dark-color);
            color: white;
            padding: var(--spacing-lg) 0;
        }
        .web-link {
            display: inline-block;
            margin: 0.8rem 1.5rem 0.8rem 0;
            padding: 0.5rem 1rem;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 30px;
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .web-link a {
            color: white;
        }
        .site-footer {
            background-color: #111;
            color: #aaa;
            padding: var(--spacing-lg) 0;
        }
        .footer-container {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-md);
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1rem;
        }
        .copyright {
            margin-top: var(--spacing-md);
            padding-top: var(--spacing-md);
            border-top: 1px solid #333;
            text-align: center;
            width: 100%;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            html {
                font-size: 14px;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                background-color: white;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                padding: var(--spacing-md);
                transition: var(--transition);
                z-index: 999;
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                display: block;
                padding: 1rem 0;
                border-bottom: 1px solid var(--border-color);
            }
            .main-nav a::after {
                display: none;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .search-box button {
                padding: 0 1.5rem;
            }
            .stars {
                flex-wrap: wrap;
            }
        }