* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.6;
        }
        a {
            text-decoration: none;
            color: #0056b3;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #ff6b35;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #002366 0%, #0056b3 100%);
            color: white;
            padding: 20px 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo {
            font-size: 2rem;
            font-weight: bold;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            font-size: 2.5rem;
            color: #ff6b35;
        }
        .logo:hover {
            color: #ffcc00;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
            flex-wrap: wrap;
        }
        nav ul li a {
            color: white;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 5px;
        }
        nav ul li a:hover {
            background-color: rgba(255, 255, 255, 0.2);
        }
        .breadcrumb {
            margin-top: 15px;
            font-size: 0.9rem;
            color: #ccc;
        }
        .breadcrumb a {
            color: #ffcc00;
        }
        main {
            padding: 40px 0;
            background: white;
            border-radius: 10px;
            margin-top: 20px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        article {
            padding: 0 30px;
        }
        h1 {
            font-size: 3rem;
            color: #002366;
            margin-bottom: 25px;
            text-align: center;
            line-height: 1.2;
        }
        h2 {
            font-size: 2.2rem;
            color: #0056b3;
            margin: 40px 0 20px;
            border-left: 5px solid #ff6b35;
            padding-left: 15px;
        }
        h3 {
            font-size: 1.8rem;
            color: #333;
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.4rem;
            color: #555;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fffacd;
            padding: 15px;
            border-left: 4px solid #ffcc00;
            margin: 25px 0;
            font-weight: bold;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 25px auto;
            display: block;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -15px;
            margin-bottom: 30px;
        }
        .function-section {
            margin: 50px 0;
            padding: 30px;
            background-color: #f1f8ff;
            border-radius: 10px;
            border: 1px solid #cce5ff;
        }
        .function-section h2 {
            border-left: none;
            text-align: center;
            color: #002366;
        }
        form {
            display: grid;
            gap: 20px;
            max-width: 600px;
            margin: 0 auto;
        }
        input, textarea, select {
            padding: 15px;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
            width: 100%;
        }
        button {
            padding: 15px 30px;
            background: linear-gradient(to right, #0056b3, #002366);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: transform 0.3s ease, background 0.3s ease;
        }
        button:hover {
            background: linear-gradient(to right, #ff6b35, #ffcc00);
            transform: scale(1.05);
        }
        .rating {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 20px 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ccc;
            cursor: pointer;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffcc00;
        }
        footer {
            background-color: #002366;
            color: white;
            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;
        }
        friend-link {
            display: block;
            margin: 15px 0;
        }
        friend-link a {
            color: #ffcc00;
            font-size: 1.1rem;
        }
        friend-link a:hover {
            color: #ff6b35;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #0056b3;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-toggle {
                display: block;
                position: absolute;
                top: 25px;
                right: 20px;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 20px;
                gap: 10px;
            }
            nav ul.active {
                display: flex;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            article {
                padding: 0 15px;
            }
            .function-section {
                padding: 20px;
            }
        }
        @media (min-width: 769px) {
            .nav-toggle {
                display: none;
            }
            nav ul {
                display: flex;
            }
        }
        .text-center {
            text-align: center;
        }
        .mb-30 {
            margin-bottom: 30px;
        }
        .link-in-text {
            font-weight: bold;
            color: #0056b3;
            text-decoration: underline;
        }
        .link-in-text:hover {
            color: #ff6b35;
        }