* {
            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;
            max-width: 100vw;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0056a9 0%, #003580 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2rem;
            font-weight: 900;
            color: white;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 1px;
            background: linear-gradient(90deg, #ffd700, #ffffff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            transition: transform 0.3s;
        }
        .logo a:hover {
            transform: scale(1.05);
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 2rem;
        }
        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        nav ul li a:hover, nav ul li a.active {
            background-color: rgba(255, 255, 255, 0.2);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #0056a9;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: #6c757d;
        }
        main {
            padding: 2rem 0;
            background: white;
        }
        article {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #003580;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #ffd700;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #0056a9;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e9ecef;
        }
        h3 {
            font-size: 1.6rem;
            color: #007bff;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #495057;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 4px solid #ffd700;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 4px 4px 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 2rem auto;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        a {
            color: #007bff;
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: #0056a9;
            text-decoration: underline;
        }
        emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .keyword-link {
            font-weight: bold;
            color: #dc3545;
        }
        .interactive-section {
            background-color: #f8f9fa;
            padding: 2rem;
            border-radius: 8px;
            margin: 3rem 0;
            border: 1px solid #dee2e6;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input[type="text"],
        input[type="email"],
        textarea,
        select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ced4da;
            border-radius: 4px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        input:focus,
        textarea:focus,
        select:focus {
            border-color: #80bdff;
            outline: 0;
            box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
        }
        button {
            background-color: #0056a9;
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        button:hover {
            background-color: #003580;
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ccc;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffd700;
        }
        footer {
            background-color: #343a40;
            color: #f8f9fa;
            padding: 3rem 0 2rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #ffd700;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            list-style: none;
        }
        .friend-links a {
            color: #adb5bd;
            padding: 0.5rem;
            border: 1px solid #495057;
            border-radius: 4px;
            transition: all 0.3s;
        }
        .friend-links a:hover {
            color: #ffd700;
            border-color: #ffd700;
            background-color: rgba(255,215,0,0.1);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #495057;
            font-size: 0.9rem;
            color: #adb5bd;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .logo {
                margin-bottom: 1rem;
            }
            nav ul {
                flex-direction: column;
                width: 100%;
                display: none;
            }
            nav ul.show {
                display: flex;
            }
            nav ul li {
                margin: 0.5rem 0;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.5rem;
                right: 20px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.4rem;
            }
            .interactive-section {
                padding: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            h1 {
                font-size: 1.8rem;
            }
        }