* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #f0f0f0;
            background: linear-gradient(135deg, #0f1a2e 0%, #1a2b3c 100%);
            min-height: 100vh;
            padding-top: 80px; 
        }
        a {
            color: #4fc3f7;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #29b6f6;
            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: rgba(15, 26, 46, 0.95);
            border-bottom: 2px solid #2a3c52;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            backdrop-filter: blur(10px);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2rem;
            color: #00e5ff;
            text-shadow: 0 0 10px rgba(0, 229, 255, 0.7);
            letter-spacing: 1px;
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
        }
        .my-logo a:hover {
            text-decoration: none;
            color: #00b8d4;
        }
        .breadcrumb {
            font-size: 0.9rem;
            color: #b0bec5;
            margin-top: 5px;
        }
        .breadcrumb a {
            color: #b0bec5;
        }
        .breadcrumb a:hover {
            color: #ffffff;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 25px;
        }
        nav ul li a {
            color: #e0e0e0;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 5px;
            transition: all 0.3s ease;
        }
        nav ul li a:hover {
            background: rgba(79, 195, 247, 0.2);
            color: #4fc3f7;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            color: #4fc3f7;
            cursor: pointer;
            background: none;
            border: none;
        }
        main {
            background: rgba(26, 43, 60, 0.8);
            border-radius: 10px;
            padding: 30px;
            margin: 30px auto;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }
        article {
            max-width: 900px;
            margin: 0 auto;
        }
        h1, h2, h3, h4 {
            color: #4fc3f7;
            margin-top: 1.5em;
            margin-bottom: 0.5em;
            line-height: 1.2;
        }
        h1 {
            font-size: 3rem;
            border-bottom: 3px solid #00e5ff;
            padding-bottom: 10px;
            text-align: center;
        }
        h2 {
            font-size: 2.2rem;
            color: #29b6f6;
            padding-left: 10px;
            border-left: 5px solid #00e5ff;
        }
        h3 {
            font-size: 1.8rem;
            color: #81d4fa;
        }
        h4 {
            font-size: 1.4rem;
            color: #b3e5fc;
        }
        p {
            margin-bottom: 1.2em;
            text-align: justify;
            hyphens: auto;
        }
        strong {
            color: #ffcc80;
            font-weight: 700;
        }
        em {
            color: #ce93d8;
        }
        blockquote {
            border-left: 4px solid #00e5ff;
            padding-left: 20px;
            margin: 20px 0;
            font-style: italic;
            color: #b0bec5;
            background: rgba(0, 229, 255, 0.05);
            padding: 15px;
            border-radius: 0 8px 8px 0;
        }
        .highlight {
            background: linear-gradient(90deg, rgba(255, 204, 128, 0.2), transparent);
            padding: 10px;
            border-radius: 5px;
            border-left: 3px solid #ffcc80;
            margin: 15px 0;
        }
        ul, ol {
            margin-left: 20px;
            margin-bottom: 1.2em;
        }
        li {
            margin-bottom: 0.5em;
        }
        .feature-img {
            width: 100%;
            max-width: 800px;
            margin: 30px auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.7);
            border: 2px solid #2a3c52;
        }
        .feature-img img {
            width: 100%;
            height: auto;
            transition: transform 0.5s ease;
        }
        .feature-img:hover img {
            transform: scale(1.03);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #90a4ae;
            margin-top: 8px;
            font-size: 0.9rem;
        }
        .function-section {
            background: rgba(15, 26, 46, 0.7);
            border-radius: 10px;
            padding: 25px;
            margin: 40px 0;
            border: 1px solid #2a3c52;
        }
        .function-section h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .function-section h3 i {
            color: #00e5ff;
        }
        form {
            display: grid;
            gap: 15px;
            max-width: 600px;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #2a3c52;
            border-radius: 5px;
            background: rgba(255, 255, 255, 0.1);
            color: #f0f0f0;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #00e5ff;
            box-shadow: 0 0 8px rgba(0, 229, 255, 0.5);
        }
        button {
            background: linear-gradient(90deg, #00e5ff, #2979ff);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            font-size: 1rem;
            transition: all 0.3s ease;
            justify-self: start;
        }
        button:hover {
            background: linear-gradient(90deg, #00b8d4, #2962ff);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 229, 255, 0.4);
        }
        .star-rating {
            display: flex;
            gap: 10px;
            margin: 10px 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #555;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: #ffcc00;
        }
        footer {
            background: rgba(15, 26, 46, 0.95);
            border-top: 2px solid #2a3c52;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h4 {
            color: #4fc3f7;
            margin-bottom: 15px;
            font-size: 1.2rem;
        }
        .footer-section ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-section ul li {
            margin-bottom: 10px;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 10px;
        }
        friend-link {
            display: inline-block;
            background: rgba(79, 195, 247, 0.1);
            padding: 8px 15px;
            border-radius: 5px;
            border: 1px solid #2a3c52;
            transition: all 0.3s ease;
        }
        friend-link:hover {
            background: rgba(79, 195, 247, 0.3);
            border-color: #4fc3f7;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #2a3c52;
            color: #90a4ae;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            body {
                padding-top: 70px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .header-content {
                flex-direction: column;
                align-items: flex-start;
                padding: 10px 0;
            }
            .my-logo {
                font-size: 1.8rem;
                margin-bottom: 5px;
            }
            .breadcrumb {
                margin-bottom: 10px;
            }
            nav ul {
                flex-direction: column;
                background: rgba(15, 26, 46, 0.98);
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                padding: 20px;
                display: none;
                box-shadow: 0 10px 20px rgba(0,0,0,0.5);
                border-top: 1px solid #2a3c52;
            }
            nav ul.show {
                display: flex;
            }
            nav ul li {
                margin: 10px 0;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 20px;
                right: 20px;
            }
            main {
                padding: 20px;
                margin: 20px auto;
            }
            .function-section {
                padding: 20px;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        main, .function-section, .feature-img {
            animation: fadeIn 0.8s ease-out;
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.7); }
            70% { box-shadow: 0 0 0 10px rgba(0, 229, 255, 0); }
            100% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0); }
        }
        .pulse-btn {
            animation: pulse 1.5s infinite;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0,0,0,0);
            border: 0;
        }