* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
            padding: 0;
            margin: 0;
        }
        a {
            text-decoration: none;
            color: #2a7ae2;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #1a5bb8;
        }
        ul, ol {
            padding-left: 20px;
            margin-bottom: 1rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        header {
            background: linear-gradient(135deg, #1e3c72, #2a5298);
            color: white;
            padding: 1rem 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;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: #ffcc00;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            display: flex;
            align-items: center;
        }
        .my-logo i {
            margin-right: 10px;
            font-size: 2.2rem;
        }
        .breadcrumb {
            margin: 10px 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #ffcc00;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb span {
            color: #ccc;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .main-nav {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: background 0.3s ease;
        }
        .main-nav a:hover {
            background: rgba(255,255,255,0.2);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #1e3c72;
                padding: 1rem;
                box-shadow: 0 4px 8px rgba(0,0,0,0.2);
            }
            .main-nav.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-top {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        main {
            background: white;
            padding: 2rem 1rem;
            margin: 1rem auto;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        article {
            max-width: 900px;
            margin: 0 auto;
        }
        h1 {
            font-size: 2.8rem;
            color: #1e3c72;
            margin-bottom: 1.5rem;
            border-bottom: 3px solid #ffcc00;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #2a5298;
            margin: 2rem 0 1rem;
            padding-left: 10px;
            border-left: 5px solid #ffcc00;
        }
        h3 {
            font-size: 1.5rem;
            color: #3a6bc2;
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #555;
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            line-height: 1.8;
        }
        .highlight {
            background: #fff9e6;
            padding: 1.5rem;
            border-left: 4px solid #ffcc00;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .bold {
            font-weight: 800;
            color: #1e3c72;
        }
        .image-container {
            text-align: center;
            margin: 2rem 0;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            max-width: 80%;
            margin: 0 auto;
        }
        .caption {
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
        }
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
            padding: 2rem;
            background: #f0f8ff;
            border-radius: 10px;
        }
        .feature-box {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
        }
        .feature-box h3 {
            color: #2a5298;
            margin-top: 0;
        }
        .feature-box form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .feature-box input, .feature-box textarea, .feature-box select {
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
        }
        .feature-box button {
            background: #2a7ae2;
            color: white;
            border: none;
            padding: 0.8rem;
            border-radius: 5px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        .feature-box button:hover {
            background: #1a5bb8;
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .stars input {
            display: none;
        }
        .stars label {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
        }
        .stars input:checked ~ label,
        .stars label:hover,
        .stars label:hover ~ label {
            color: #ffcc00;
        }
        footer {
            background: #1e3c72;
            color: white;
            padding: 2rem 1rem;
            margin-top: 2rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #ffcc00;
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-links a {
            color: #ccc;
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: #ffcc00;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            font-style: italic;
            color: #ffcc00;
        }
        .copyright {
            text-align: center;
            padding-top: 1rem;
            border-top: 1px solid #2a5298;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.4rem;
            }
            .features {
                grid-template-columns: 1fr;
                padding: 1rem;
            }
        }