* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #4a1fb8;
            --secondary: #ff6b35;
            --accent: #00c853;
            --dark: #1a1a2e;
            --light: #f8f9fa;
            --gray: #6c757d;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --transition: all 0.3s ease;
        }
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            color: #333;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            border-bottom: 1px solid #eee;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .logo span {
            background: linear-gradient(45deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .search-box {
            display: flex;
            width: 100%;
            max-width: 500px;
        }
        .search-box input {
            flex: 1;
            padding: 12px 20px;
            border: 2px solid #e0e0e0;
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-box input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .search-box button {
            background: linear-gradient(45deg, var(--primary), #6a45d8);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: var(--secondary);
            transform: translateY(-2px);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .nav-desktop {
            display: flex;
            gap: 30px;
        }
        .nav-desktop a {
            color: var(--dark);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-desktop a:hover {
            color: var(--primary);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--secondary);
            transition: var(--transition);
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 10px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .breadcrumb {
            padding: 15px 0;
            background: #f1f3ff;
            margin-bottom: 30px;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        .breadcrumb i {
            font-size: 0.8rem;
        }
        .main-content {
            flex: 1;
            padding: 30px 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 50px;
            padding: 30px;
            background: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 20px;
            color: var(--gray);
            margin-bottom: 20px;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            border-left: 5px solid var(--accent);
            padding: 25px;
            border-radius: var(--radius);
            margin: 40px 0;
        }
        .content-section {
            background: white;
            border-radius: var(--radius);
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .content-section:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        h2 {
            color: var(--primary);
            font-size: 2.2rem;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 3px solid #f0f0f0;
        }
        h3 {
            color: var(--secondary);
            font-size: 1.8rem;
            margin: 30px 0 20px;
        }
        h4 {
            color: var(--dark);
            font-size: 1.4rem;
            margin: 25px 0 15px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            color: #444;
        }
        strong {
            color: var(--primary);
            font-weight: 700;
        }
        .content-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--radius);
            margin: 30px auto;
            display: block;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
        }
        .content-img:hover {
            transform: scale(1.02);
        }
        .download-box {
            background: linear-gradient(135deg, var(--primary), #6a45d8);
            color: white;
            padding: 40px;
            border-radius: var(--radius);
            text-align: center;
            margin: 50px 0;
        }
        .download-btn {
            display: inline-flex;
            align-items: center;
            gap: 15px;
            background: var(--secondary);
            color: white;
            padding: 18px 35px;
            border-radius: 50px;
            font-size: 1.3rem;
            font-weight: 700;
            text-decoration: none;
            margin-top: 20px;
            transition: var(--transition);
            box-shadow: 0 6px 15px rgba(255, 107, 53, 0.3);
        }
        .download-btn:hover {
            background: #ff8533;
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(255, 107, 53, 0.4);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin: 40px 0;
        }
        .feature-card {
            background: #f8f9ff;
            padding: 25px;
            border-radius: var(--radius);
            text-align: center;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .feature-card:hover {
            border-color: var(--primary);
            transform: translateY(-8px);
        }
        .feature-card i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .rating-section {
            background: #fff9f5;
            padding: 30px;
            border-radius: var(--radius);
            margin: 50px 0;
            border: 2px dashed var(--secondary);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 20px 0;
        }
        .star-rating i {
            font-size: 2rem;
            color: #ffd700;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .comment-form, .rating-form {
            max-width: 600px;
            margin: 30px auto;
        }
        .form-group {
            margin-bottom: 25px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
        }
        .form-control {
            width: 100%;
            padding: 15px;
            border: 2px solid #e0e0e0;
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(74, 31, 184, 0.1);
        }
        .btn-submit {
            background: linear-gradient(45deg, var(--primary), var(--secondary));
            color: white;
            border: none;
            padding: 16px 40px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-submit:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(74, 31, 184, 0.2);
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 50px 0;
        }
        .web-link {
            background: white;
            padding: 20px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .web-link:hover {
            background: #f0f7ff;
            transform: translateX(10px);
        }
        .web-link a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .web-link a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        .footer {
            background: var(--dark);
            color: white;
            padding: 60px 0 30px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 20px;
            color: white;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.3rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #333;
            color: #aaa;
            font-size: 0.95rem;
        }
        @media (max-width: 1024px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 20px;
            }
            .search-box {
                max-width: 100%;
            }
            .hamburger {
                display: flex;
            }
            .nav-desktop {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: white;
                padding: 20px;
                box-shadow: var(--shadow);
            }
            .nav-desktop.active {
                display: flex;
            }
            .content-section {
                padding: 25px;
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            .download-btn { padding: 15px 25px; font-size: 1.1rem; }
            .article-header { padding: 20px; }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .content-section {
            animation: fadeIn 0.6s ease-out;
        }
        .text-center { text-align: center; }
        .mt-4 { margin-top: 40px; }
        .mb-4 { margin-bottom: 40px; }
        .py-3 { padding-top: 30px; padding-bottom: 30px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }