* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #2c3e50;
            --secondary: #3498db;
            --accent: #e74c3c;
            --light: #ecf0f1;
            --dark: #2c3e50;
            --success: #27ae60;
            --warning: #f39c12;
            --text: #333333;
            --text-light: #666666;
            --border: #ddd;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--text);
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        h1, h2, h3, h4 {
            color: var(--primary);
            margin-bottom: 1.5rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 3.5rem;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-top: 1rem;
        }
        h2 {
            font-size: 2.5rem;
            border-left: 5px solid var(--secondary);
            padding-left: 20px;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--accent);
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .main-header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .logo {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo span {
            color: var(--secondary);
        }
        .logo:hover {
            transform: scale(1.02);
            transition: transform 0.3s ease;
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .nav-link {
            text-decoration: none;
            color: var(--text);
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: all 0.3s ease;
        }
        .nav-link:hover {
            background: var(--secondary);
            color: white;
        }
        .nav-link.active {
            background: var(--primary);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary);
        }
        .mobile-nav {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: white;
            box-shadow: var(--shadow);
            padding: 1rem;
            flex-direction: column;
            gap: 1rem;
        }
        .mobile-nav.active {
            display: flex;
        }
        .breadcrumb {
            background: var(--light);
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem 0;
        }
        .breadcrumb a {
            color: var(--secondary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-content {
            background: white;
            border-radius: 15px;
            box-shadow: var(--shadow);
            margin: 2rem auto;
            padding: 3rem;
            position: relative;
            overflow: hidden;
        }
        .main-content::before {
            content: '♠♣♥♦';
            position: absolute;
            top: -50px;
            right: -50px;
            font-size: 20rem;
            color: rgba(52, 152, 219, 0.05);
            z-index: 0;
            transform: rotate(15deg);
        }
        .highlight {
            background: linear-gradient(120deg, rgba(52, 152, 219, 0.1), rgba(231, 76, 60, 0.1));
            border-left: 4px solid var(--secondary);
            padding: 2rem;
            margin: 2rem 0;
            border-radius: 8px;
        }
        .tip-box {
            background: var(--light);
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
            border: 2px dashed var(--secondary);
        }
        .tip-box i {
            color: var(--warning);
            margin-right: 10px;
        }
        .content-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
            transition: transform 0.3s ease;
        }
        .content-img:hover {
            transform: scale(1.02);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .feature-card {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            text-align: center;
            transition: transform 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-10px);
        }
        .feature-card i {
            font-size: 3rem;
            color: var(--secondary);
            margin-bottom: 1rem;
        }
        .search-container {
            background: var(--light);
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 1rem;
            border: 2px solid var(--secondary);
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-btn {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease;
        }
        .search-btn:hover {
            background: var(--primary);
        }
        .rating-container {
            background: var(--light);
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: var(--warning);
            cursor: pointer;
            transition: transform 0.2s ease;
        }
        .star:hover {
            transform: scale(1.2);
        }
        .star.active {
            color: gold;
        }
        .comment-container {
            margin: 3rem 0;
        }
        .comment-form {
            background: var(--light);
            padding: 2rem;
            border-radius: 10px;
            margin-bottom: 2rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-control {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--secondary);
        }
        .submit-btn {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease;
        }
        .submit-btn:hover {
            background: var(--primary);
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1rem;
            margin: 3rem 0;
        }
        .web-link {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 1.5rem;
            border-radius: 8px;
            text-decoration: none;
            text-align: center;
            font-weight: 600;
            transition: transform 0.3s ease;
            box-shadow: var(--shadow);
        }
        .web-link:hover {
            transform: translateY(-5px);
        }
        .main-footer {
            background: var(--primary);
            color: white;
            padding: 3rem 0 1rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .main-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .main-content {
                padding: 1.5rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                border-radius: 8px;
                margin-bottom: 1rem;
            }
            .search-btn {
                border-radius: 8px;
            }
            .header-container {
                padding: 0.5rem 0;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }
        .emoji {
            font-size: 1.2em;
            margin: 0 5px;
        }
        .bold {
            font-weight: 700;
            color: var(--primary);
        }
        .italic {
            font-style: italic;
            color: var(--text-light);
        }
        .text-center {
            text-align: center;
        }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mt-3 { margin-top: 3rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .section-spacing {
            margin: 4rem 0;
        }
        .lazy-load {
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .lazy-load.loaded {
            opacity: 1;
        }