* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #FF6B35;
            --secondary: #1A73E8;
            --accent: #FFD166;
            --dark: #2D3047;
            --light: #F8F9FA;
            --gray: #6C757D;
            --success: #06D6A0;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f0f2f5;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 1.5rem;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            background: #e55a2b;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .btn-secondary {
            background: var(--secondary);
        }
        .btn-secondary:hover {
            background: #0d5dc1;
        }
        .section {
            padding: 60px 0;
        }
        .text-center {
            text-align: center;
        }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .mb-5 { margin-bottom: 3rem; }
        .mt-1 { margin-top: 0.5rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .mt-4 { margin-top: 2rem; }
        .mt-5 { margin-top: 3rem; }
        .p-2 { padding: 1rem; }
        .p-3 { padding: 1.5rem; }
        .rounded { border-radius: 10px; }
        .box-shadow { box-shadow: var(--shadow); }
        .highlight {
            background: linear-gradient(90deg, var(--accent) 0%, rgba(255,209,102,0.3) 100%);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
        }
        header {
            background: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo span {
            color: var(--secondary);
        }
        .logo i {
            font-size: 2.2rem;
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .desktop-nav a {
            font-weight: 600;
            color: var(--dark);
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
        }
        .desktop-nav a:hover {
            color: var(--primary);
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--primary);
            transition: var(--transition);
        }
        .desktop-nav a:hover::after {
            width: 100%;
        }
        .menu-toggle {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--dark);
        }
        .mobile-nav {
            display: none;
            background: white;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            padding: 20px;
            flex-direction: column;
            gap: 15px;
            transform: translateY(-10px);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .mobile-nav.active {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
        }
        .mobile-nav a {
            padding: 12px 0;
            border-bottom: 1px solid #eee;
            font-weight: 600;
            display: block;
        }
        .breadcrumb {
            background: #f8f9fa;
            padding: 12px 20px;
            border-top: 1px solid #dee2e6;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--secondary);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray);
        }
        .hero {
            background: linear-gradient(135deg, var(--secondary) 0%, #4a9eff 100%);
            color: white;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
            background-size: 30px 30px;
            opacity: 0.3;
            animation: float 20s linear infinite;
        }
        @keyframes float {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .search-box {
            max-width: 600px;
            margin: 40px auto;
            background: white;
            border-radius: 50px;
            padding: 5px;
            display: flex;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
        }
        .search-input {
            flex: 1;
            border: none;
            padding: 18px 25px;
            font-size: 1rem;
            border-radius: 50px 0 0 50px;
            outline: none;
        }
        .search-btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 35px;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: #e55a2b;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin-top: 40px;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            border-radius: 15px;
            padding: 40px;
            box-shadow: var(--shadow);
        }
        article h2 {
            color: var(--dark);
            font-size: 2.2rem;
            margin-bottom: 1.5rem;
            padding-bottom: 15px;
            border-bottom: 3px solid var(--accent);
        }
        article h3 {
            color: var(--secondary);
            font-size: 1.8rem;
            margin: 2.5rem 0 1rem;
        }
        article h4 {
            color: var(--dark);
            font-size: 1.4rem;
            margin: 2rem 0 1rem;
        }
        article p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        article ul, article ol {
            margin-bottom: 1.5rem;
            padding-left: 2rem;
        }
        article li {
            margin-bottom: 0.8rem;
            line-height: 1.7;
        }
        .code-list {
            background: #f8f9fa;
            border-left: 5px solid var(--success);
            padding: 25px;
            border-radius: 0 10px 10px 0;
            margin: 2rem 0;
        }
        .code-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px;
            background: white;
            margin-bottom: 15px;
            border-radius: 8px;
            border: 2px dashed #dee2e6;
            transition: var(--transition);
        }
        .code-item:hover {
            border-color: var(--primary);
            transform: translateX(5px);
        }
        .code {
            font-family: monospace;
            font-size: 1.3rem;
            font-weight: bold;
            color: var(--secondary);
            letter-spacing: 1px;
        }
        .reward {
            font-weight: 600;
            color: var(--success);
        }
        .expired {
            opacity: 0.6;
            position: relative;
        }
        .expired::after {
            content: 'EXPIRED';
            position: absolute;
            top: -8px;
            right: -8px;
            background: #dc3545;
            color: white;
            font-size: 0.7rem;
            padding: 3px 8px;
            border-radius: 4px;
        }
        aside {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: white;
            border-radius: 15px;
            padding: 25px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--dark);
            margin-bottom: 1.5rem;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        .popular-links a {
            display: block;
            padding: 12px 0;
            border-bottom: 1px solid #f0f0f0;
            transition: var(--transition);
        }
        .popular-links a:hover {
            color: var(--primary);
            padding-left: 10px;
        }
        .popular-links i {
            margin-right: 10px;
            color: var(--gray);
        }
        .rating-widget {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 15px;
        }
        .stars {
            display: flex;
            gap: 5px;
            font-size: 2rem;
            color: #FFD166;
            margin-bottom: 10px;
        }
        .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover {
            transform: scale(1.2);
        }
        .comment-form, .rating-form {
            background: white;
            border-radius: 15px;
            padding: 30px;
            box-shadow: var(--shadow);
            margin-top: 40px;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark);
        }
        input, textarea, select {
            width: 100%;
            padding: 14px;
            border: 2px solid #dee2e6;
            border-radius: 10px;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            border-color: var(--primary);
            outline: none;
        }
        textarea {
            min-height: 150px;
            resize: vertical;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        @media (max-width: 768px) {
            .form-row {
                grid-template-columns: 1fr;
            }
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            background: var(--dark);
            color: white;
            padding: 50px 20px;
        }
        @media (max-width: 992px) {
            .web-links {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (max-width: 576px) {
            .web-links {
                grid-template-columns: 1fr;
            }
        }
        .web-link {
            background: rgba(255,255,255,0.05);
            padding: 20px;
            border-radius: 10px;
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255,255,255,0.1);
            transform: translateY(-5px);
        }
        .web-link a {
            color: var(--accent);
            font-weight: 600;
            display: block;
            margin-bottom: 8px;
        }
        .web-link p {
            font-size: 0.9rem;
            opacity: 0.8;
        }
        footer {
            background: #1a1a2e;
            color: #aaa;
            padding: 50px 0 20px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        @media (max-width: 768px) {
            .footer-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .footer-container {
                grid-template-columns: 1fr;
            }
        }
        .footer-col h4 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 12px;
        }
        .footer-col a {
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #2a2a3e;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1rem;
            }
            article {
                padding: 25px;
            }
            article h2 {
                font-size: 1.8rem;
            }
            article h3 {
                font-size: 1.5rem;
            }
            .section {
                padding: 40px 0;
            }
        }