* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background-color: #f8f9fa;
            padding: 0;
            margin: 0;
        }
        a {
            text-decoration: none;
            color: #007bff;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #0056b3;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #fff;
            padding: 20px 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo a {
            font-size: 2.5rem;
            font-weight: 800;
            color: #00ff88;
            text-transform: uppercase;
            letter-spacing: 2px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a i {
            font-size: 2rem;
        }
        .logo a:hover {
            color: #00cc6a;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        nav ul li a {
            color: #fff;
            font-weight: 600;
            padding: 8px 15px;
            border-radius: 5px;
            transition: background 0.3s ease;
        }
        nav ul li a:hover {
            background: rgba(255,255,255,0.2);
            text-decoration: none;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: #ccc;
            margin-top: 10px;
        }
        .breadcrumb a {
            color: #00ff88;
        }
        .breadcrumb a:hover {
            color: #00cc6a;
        }
        main {
            padding: 40px 0;
            background: #fff;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 20px auto;
        }
        article {
            padding: 0 20px;
        }
        h1 {
            font-size: 3.5rem;
            color: #1a1a2e;
            margin-bottom: 30px;
            text-align: center;
            border-bottom: 4px solid #00ff88;
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2.5rem;
            color: #16213e;
            margin: 40px 0 20px;
            padding-left: 10px;
            border-left: 6px solid #007bff;
        }
        h3 {
            font-size: 2rem;
            color: #0f3460;
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.5rem;
            color: #333;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 25px;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background: linear-gradient(90deg, #ffeb3b 0%, #ff9800 100%);
            padding: 20px;
            border-radius: 10px;
            margin: 30px 0;
            border-left: 8px solid #ff5722;
            font-weight: bold;
            color: #333;
        }
        .image-container {
            text-align: center;
            margin: 40px 0;
        }
        .image-container img {
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            transition: transform 0.5s ease;
        }
        .image-container img:hover {
            transform: scale(1.02);
        }
        .image-caption {
            font-style: italic;
            color: #666;
            margin-top: 10px;
            font-size: 0.9rem;
        }
        ul, ol {
            margin-left: 30px;
            margin-bottom: 25px;
        }
        li {
            margin-bottom: 10px;
        }
        blockquote {
            border-left: 5px solid #00ff88;
            padding-left: 20px;
            margin: 30px 0;
            font-style: italic;
            color: #555;
            background: #f1f8e9;
            padding: 20px;
            border-radius: 0 10px 10px 0;
        }
        .update-time {
            text-align: right;
            font-size: 0.9rem;
            color: #888;
            margin-top: 50px;
            padding-top: 20px;
            border-top: 1px dashed #ccc;
        }
        .functionality {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 50px 0;
            padding: 30px;
            background: #f1f8ff;
            border-radius: 15px;
        }
        .function-box {
            background: #fff;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s ease;
        }
        .function-box:hover {
            transform: translateY(-10px);
        }
        .function-box h3 {
            color: #007bff;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .function-box form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .function-box input, .function-box textarea, .function-box select {
            padding: 12px;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        .function-box input:focus, .function-box textarea:focus, .function-box select:focus {
            border-color: #007bff;
            outline: none;
        }
        .function-box button {
            padding: 12px;
            background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
            color: #fff;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s ease;
        }
        .function-box button:hover {
            background: linear-gradient(135deg, #0056b3 0%, #003d7a 100%);
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            font-size: 1.5rem;
            color: #ffc107;
            cursor: pointer;
        }
        .rating-stars i:hover {
            color: #ff9800;
        }
        footer {
            background: #1a1a2e;
            color: #fff;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-section h3 {
            color: #00ff88;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        .friend-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .friend-link {
            display: inline-block;
            padding: 8px 15px;
            background: rgba(255,255,255,0.1);
            border-radius: 5px;
            color: #fff;
            transition: background 0.3s ease;
        }
        .friend-link:hover {
            background: rgba(0,255,136,0.2);
            color: #00ff88;
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #333;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #16213e;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 20px;
                border-radius: 0 0 10px 10px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            }
            nav ul.active {
                display: flex;
            }
            nav ul li {
                margin: 10px 0;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .functionality {
                grid-template-columns: 1fr;
            }
            .header-top {
                flex-direction: column;
                align-items: flex-start;
            }
            .logo a {
                font-size: 2rem;
            }
        }