* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a73e8;
            --primary-dark: #0d47a1;
            --secondary: #ff6b00;
            --accent: #00c853;
            --dark: #202124;
            --light: #f8f9fa;
            --gray: #5f6368;
            --gray-light: #dadce0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--dark);
            background-color: var(--light);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: 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 var(--gray-light);
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: -1px;
        }
        .my-logo span {
            color: var(--secondary);
        }
        .search-form {
            flex-grow: 1;
            max-width: 500px;
            margin: 0 30px;
            position: relative;
        }
        .search-input {
            width: 100%;
            padding: 12px 20px;
            border: 2px solid var(--gray-light);
            border-radius: 30px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .search-button {
            position: absolute;
            right: 5px;
            top: 5px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background: var(--primary-dark);
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--gray);
            cursor: pointer;
        }
        .main-nav {
            padding: 15px 0;
        }
        .nav-list {
            display: flex;
            justify-content: center;
            list-style: none;
            gap: 30px;
        }
        .nav-link {
            font-weight: 600;
            padding: 8px 16px;
            border-radius: var(--border-radius);
        }
        .nav-link:hover {
            background-color: var(--light);
            color: var(--primary);
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #f1f3f4;
            font-size: 0.9rem;
        }
        .breadcrumb-list {
            display: flex;
            list-style: none;
            gap: 10px;
        }
        .breadcrumb-item::after {
            content: "›";
            margin-left: 10px;
            color: var(--gray);
        }
        .breadcrumb-item:last-child::after {
            content: "";
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        .article-content {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 40px;
            overflow: hidden;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 25px;
        }
        .widget-title {
            font-size: 1.2rem;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--primary);
            color: var(--dark);
        }
        h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 25px;
            color: var(--dark);
            position: relative;
            padding-bottom: 15px;
        }
        h1::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100px;
            height: 5px;
            background: linear-gradient(to right, var(--primary), var(--accent));
            border-radius: 5px;
        }
        h2 {
            font-size: 2rem;
            margin: 40px 0 20px;
            color: var(--primary-dark);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--gray-light);
        }
        h3 {
            font-size: 1.5rem;
            margin: 30px 0 15px;
            color: var(--dark);
        }
        h4 {
            font-size: 1.2rem;
            margin: 25px 0 10px;
            color: var(--gray);
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--gray);
            margin-bottom: 30px;
            padding: 20px;
            background-color: #e8f0fe;
            border-radius: var(--border-radius);
            border-left: 5px solid var(--primary);
        }
        .highlight {
            background-color: #fff8e1;
            padding: 25px;
            border-radius: var(--border-radius);
            margin: 30px 0;
            border-left: 5px solid var(--secondary);
        }
        .code-box {
            background-color: #263238;
            color: #fff;
            padding: 20px;
            border-radius: var(--border-radius);
            margin: 20px 0;
            font-family: 'Courier New', monospace;
            overflow-x: auto;
        }
        .code {
            color: #80cbc4;
            font-weight: bold;
            font-size: 1.1rem;
        }
        .reward {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            margin: 5px;
            font-size: 0.9rem;
        }
        .stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-item {
            text-align: center;
            padding: 20px;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--primary);
            display: block;
        }
        .copy-button {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 8px 20px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            margin-left: 15px;
        }
        .copy-button:hover {
            background-color: #00b248;
            transform: translateY(-2px);
        }
        .code-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 15px;
            background-color: #f5f5f5;
            border-radius: var(--border-radius);
            margin-bottom: 15px;
            border-left: 5px solid var(--primary);
            transition: var(--transition);
        }
        .code-item:hover {
            transform: translateX(5px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .tag {
            display: inline-block;
            background-color: var(--gray-light);
            padding: 3px 10px;
            border-radius: 15px;
            font-size: 0.8rem;
            margin-left: 10px;
        }
        .tag.new {
            background-color: var(--accent);
            color: white;
        }
        .tag.expired {
            background-color: #f44336;
            color: white;
        }
        .comment-form, .rating-form {
            background-color: #f9f9f9;
            padding: 30px;
            border-radius: var(--border-radius);
            margin: 40px 0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid var(--gray-light);
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            margin: 10px 0;
        }
        .star {
            font-size: 2rem;
            color: var(--gray-light);
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: #ffc107;
        }
        .submit-button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-button:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(26, 115, 232, 0.3);
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            margin-bottom: 20px;
            color: white;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #bdc1c6;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: var(--border-radius);
            margin-bottom: 15px;
            transition: var(--transition);
        }
        friend-link:hover {
            background-color: rgba(255, 255, 255, 0.2);
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #bdc1c6;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 2.3rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                margin: 20px 0 0;
                max-width: 100%;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                padding: 0;
            }
            .main-nav.active {
                display: block;
            }
            .nav-list {
                flex-direction: column;
                gap: 0;
            }
            .nav-link {
                display: block;
                padding: 15px;
                border-bottom: 1px solid var(--gray-light);
            }
            .article-content {
                padding: 25px;
            }
            .stats {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .stats {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 2rem;
            }
            .code-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .copy-button {
                align-self: stretch;
                margin-left: 0;
            }
        }
        .text-center { text-align: center; }
        .text-bold { font-weight: 700; }
        .text-secondary { color: var(--secondary); }
        .mb-30 { margin-bottom: 30px; }
        .mt-30 { margin-top: 30px; }
        .p-20 { padding: 20px; }
        .bg-light { background-color: var(--light); }
        .rounded { border-radius: var(--border-radius); }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.5s ease forwards;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }