:root {
            --primary: #FF6600;
            --primary-dark: #CC5200;
            --secondary: #1A1A2E;
            --accent: #00CCFF;
            --light: #F8F9FA;
            --dark: #212529;
            --gray: #6C757D;
            --success: #28A745;
            --warning: #FFC107;
            --danger: #DC3545;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --radius: 8px;
            --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(--dark);
            background: linear-gradient(135deg, #0F0F23 0%, #1A1A2E 100%);
            background-attachment: fixed;
            min-height: 100vh;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: rgba(26, 26, 46, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 2px solid var(--primary);
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .logo:hover {
            color: var(--accent);
            transform: translateY(-2px);
        }
        .logo i {
            font-size: 2rem;
        }
        .nav-desktop {
            display: flex;
            gap: 30px;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-link {
            color: var(--light);
            text-decoration: none;
            font-weight: 600;
            padding: 8px 16px;
            border-radius: var(--radius);
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary);
            background: rgba(255, 102, 0, 0.1);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
        }
        .nav-link:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 4px;
            cursor: pointer;
            padding: 10px;
            background: none;
            border: none;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-mobile {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background: var(--secondary);
            padding: 20px;
            display: none;
            flex-direction: column;
            gap: 15px;
            box-shadow: var(--shadow);
            z-index: 999;
        }
        .nav-mobile.active {
            display: flex;
            animation: slideDown 0.3s ease;
        }
        @keyframes slideDown {
            from { opacity: 0; transform: translateY(-20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .breadcrumb {
            padding: 15px 0;
            background: rgba(255, 255, 255, 0.05);
            margin-bottom: 30px;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            gap: 10px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--gray);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 10px;
            color: var(--gray);
        }
        main {
            background: rgba(255, 255, 255, 0.98);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px;
            margin: 30px auto;
            position: relative;
            overflow: hidden;
        }
        main::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 5px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }
        @media (max-width: 768px) {
            main {
                padding: 20px;
                margin: 15px auto;
            }
        }
        h1 {
            color: var(--secondary);
            font-size: 2.8rem;
            margin-bottom: 25px;
            line-height: 1.2;
            text-align: center;
            padding-bottom: 20px;
            border-bottom: 3px solid var(--primary);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
        }
        h2 {
            color: var(--primary-dark);
            font-size: 2rem;
            margin: 40px 0 20px;
            padding-left: 15px;
            border-left: 5px solid var(--accent);
        }
        h3 {
            color: var(--secondary);
            font-size: 1.5rem;
            margin: 30px 0 15px;
        }
        h4 {
            color: var(--dark);
            font-size: 1.2rem;
            margin: 25px 0 10px;
        }
        .article-intro {
            background: linear-gradient(135deg, rgba(255, 102, 0, 0.1), rgba(0, 204, 255, 0.1));
            padding: 30px;
            border-radius: var(--radius);
            margin: 30px 0;
            border: 1px solid rgba(255, 102, 0, 0.2);
        }
        .highlight-box {
            background: var(--light);
            border-left: 4px solid var(--success);
            padding: 20px;
            margin: 25px 0;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }
        .pro-tip {
            background: linear-gradient(135deg, #1A1A2E, #16213E);
            color: white;
            padding: 25px;
            border-radius: var(--radius);
            margin: 30px 0;
            position: relative;
            border: 2px solid var(--accent);
        }
        .pro-tip::before {
            content: '🔥 PRO TIP';
            position: absolute;
            top: -12px;
            left: 20px;
            background: var(--accent);
            color: var(--secondary);
            padding: 5px 15px;
            border-radius: 20px;
            font-weight: bold;
            font-size: 0.9rem;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--radius);
            margin: 30px auto;
            display: block;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .article-image:hover {
            transform: scale(1.01);
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .content-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dotted var(--primary);
            transition: var(--transition);
        }
        .content-link:hover {
            color: var(--primary-dark);
            border-bottom-style: solid;
        }
        .feature-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin: 25px 0;
        }
        .feature-item {
            background: white;
            padding: 20px;
            border-radius: var(--radius);
            border: 1px solid #eaeaea;
            transition: var(--transition);
        }
        .feature-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            border-color: var(--primary);
        }
        .feature-item i {
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 15px;
        }
        .search-section {
            background: var(--light);
            padding: 30px;
            border-radius: var(--radius);
            margin: 40px 0;
            text-align: center;
            border: 2px dashed var(--primary);
        }
        .search-form {
            max-width: 600px;
            margin: 20px auto;
            display: flex;
            gap: 10px;
        }
        @media (max-width: 768px) {
            .search-form {
                flex-direction: column;
            }
        }
        .search-input {
            flex: 1;
            padding: 15px 20px;
            border: 2px solid #ddd;
            border-radius: 50px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.2);
        }
        .search-btn {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(255, 102, 0, 0.3);
        }
        .rating-section {
            background: linear-gradient(135deg, #f8f9fa, #e9ecef);
            padding: 30px;
            border-radius: var(--radius);
            margin: 40px 0;
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 20px 0;
            direction: rtl;
        }
        .star {
            font-size: 2.5rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star:hover ~ .star {
            color: var(--warning);
        }
        .star.active {
            color: var(--warning);
        }
        .rating-form {
            max-width: 500px;
            margin: 30px auto 0;
        }
        .form-group {
            margin-bottom: 20px;
            text-align: left;
        }
        .form-control {
            width: 100%;
            padding: 15px;
            border: 2px solid #ddd;
            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(255, 102, 0, 0.2);
        }
        .submit-btn {
            background: linear-gradient(135deg, var(--success), #1e7e34);
            color: white;
            border: none;
            padding: 15px 40px;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
        }
        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(40, 167, 69, 0.3);
        }
        .comments-section {
            margin: 50px 0;
            padding: 30px;
            background: white;
            border-radius: var(--radius);
            border: 1px solid #eaeaea;
        }
        .comment {
            padding: 20px;
            border-bottom: 1px solid #eee;
            margin-bottom: 20px;
        }
        .comment:last-child {
            border-bottom: none;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
        }
        .comment-author {
            font-weight: 600;
            color: var(--secondary);
        }
        .comment-date {
            color: var(--gray);
            font-size: 0.9rem;
        }
        footer {
            background: var(--secondary);
            color: var(--light);
            padding: 50px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: var(--primary);
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #bbb;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover {
            color: var(--primary);
            transform: translateX(5px);
        }
        friend-link {
            display: block;
            margin: 30px 0;
            padding: 20px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #999;
            font-size: 0.9rem;
        }
        .text-center { text-align: center; }
        .text-primary { color: var(--primary); }
        .text-bold { font-weight: 700; }
        .mb-20 { margin-bottom: 20px; }
        .mb-30 { margin-bottom: 30px; }
        .mt-40 { margin-top: 40px; }
        .p-20 { padding: 20px; }
        .emoji-badge {
            display: inline-block;
            background: rgba(255, 102, 0, 0.1);
            color: var(--primary);
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
            margin: 0 5px;
            vertical-align: middle;
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
        p {
            margin-bottom: 1.5em;
            text-align: justify;
        }
        ul, ol {
            margin-left: 20px;
            margin-bottom: 1.5em;
        }
        li {
            margin-bottom: 0.8em;
        }
        @media (max-width: 992px) {
            .feature-list {
                grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            }
        }
        @media (max-width: 576px) {
            .feature-list {
                grid-template-columns: 1fr;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .stars .star {
                font-size: 2rem;
            }
        }
        .content-block {
            margin-bottom: 40px;
            padding-bottom: 30px;
            border-bottom: 1px solid #eee;
        }
        .content-block:last-of-type {
            border-bottom: none;
        }
        .stat-card {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: white;
            padding: 25px;
            border-radius: var(--radius);
            text-align: center;
            margin: 25px 0;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1;
            margin-bottom: 10px;
        }
        .stat-label {
            font-size: 1.1rem;
            opacity: 0.9;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 30px 0;
            background: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            border-radius: var(--radius);
            overflow: hidden;
        }
        .comparison-table th {
            background: var(--secondary);
            color: white;
            padding: 15px;
            text-align: left;
            font-weight: 600;
        }
        .comparison-table td {
            padding: 15px;
            border-bottom: 1px solid #eee;
        }
        .comparison-table tr:hover {
            background: #f8f9fa;
        }
        .comparison-table tr:last-child td {
            border-bottom: none;
        }