* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #e0e0e0;
            background-color: #121212;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #00b4d8;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #90e0ef;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: #1a1a1a;
            border-bottom: 2px solid #00b4d8;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 700;
            color: #00b4d8;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            color: #90e0ef;
        }
        .nav-desktop {
            display: flex;
            gap: 30px;
        }
        .nav-desktop a {
            color: #e0e0e0;
            font-weight: 500;
            padding: 5px 10px;
            border-radius: 4px;
        }
        .nav-desktop a:hover {
            background-color: #333;
            color: #00b4d8;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            color: #e0e0e0;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: #1a1a1a;
            padding: 20px;
            border-top: 1px solid #333;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: #e0e0e0;
            padding: 10px 0;
            border-bottom: 1px solid #333;
        }
        .nav-mobile a:hover {
            color: #00b4d8;
        }
        .breadcrumb {
            padding: 10px 0;
            background-color: #1a1a1a;
            border-bottom: 1px solid #333;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li {
            display: inline;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 10px;
            color: #666;
        }
        .breadcrumb a {
            color: #00b4d8;
        }
        main {
            padding: 40px 0;
            background-color: #121212;
        }
        article {
            background-color: #1a1a1a;
            border-radius: 8px;
            padding: 30px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
        }
        h1 {
            font-size: 2.8rem;
            color: #00b4d8;
            margin-bottom: 20px;
            line-height: 1.2;
            border-bottom: 2px solid #333;
            padding-bottom: 10px;
        }
        h2 {
            font-size: 2rem;
            color: #90e0ef;
            margin-top: 40px;
            margin-bottom: 15px;
            padding-bottom: 5px;
            border-bottom: 1px solid #333;
        }
        h3 {
            font-size: 1.5rem;
            color: #caf0f8;
            margin-top: 30px;
            margin-bottom: 10px;
        }
        h4 {
            font-size: 1.2rem;
            color: #e0e0e0;
            margin-top: 20px;
            margin-bottom: 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .highlight {
            background-color: #003049;
            border-left: 4px solid #00b4d8;
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
        }
        .bold {
            font-weight: 700;
            color: #90e0ef;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .feature-image {
            margin: 30px auto;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.7);
        }
        .feature-image img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .feature-image img:hover {
            transform: scale(1.02);
        }
        .form-section {
            background-color: #222;
            padding: 25px;
            border-radius: 8px;
            margin: 40px 0;
        }
        .form-title {
            color: #00b4d8;
            margin-bottom: 15px;
            font-size: 1.5rem;
        }
        form {
            display: grid;
            gap: 15px;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px;
            border: 1px solid #444;
            border-radius: 4px;
            background-color: #333;
            color: #e0e0e0;
            font-size: 1rem;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #00b4d8;
        }
        button {
            background-color: #00b4d8;
            color: #121212;
            border: none;
            padding: 12px 20px;
            border-radius: 4px;
            font-weight: 700;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }
        button:hover {
            background-color: #90e0ef;
        }
        footer {
            background-color: #1a1a1a;
            border-top: 2px solid #00b4d8;
            padding: 40px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h3 {
            color: #00b4d8;
            margin-bottom: 15px;
        }
        .friend-links {
            list-style: none;
        }
        .friend-links li {
            margin-bottom: 10px;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #333;
            color: #666;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .header-top, .breadcrumb, article, .form-section {
                padding-left: 15px;
                padding-right: 15px;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        .content-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .grid-item {
            background-color: #222;
            padding: 20px;
            border-radius: 8px;
            border: 1px solid #333;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .grid-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0, 180, 216, 0.2);
        }