* {
            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: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(90deg, #2c3e50, #4a6491);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 700;
            text-decoration: none;
            color: #ffd700;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: color 0.3s ease;
        }
        .my-logo:hover {
            color: #fff;
            text-shadow: 0 0 10px rgba(255, 215, 0, 0.7);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            padding: 0.5rem 1rem;
            margin: 0 5px;
            border-radius: 4px;
            transition: background 0.3s ease;
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        .breadcrumb {
            padding: 10px 0;
            background: #e8eef7;
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #666;
        }
        .breadcrumb a {
            color: #4a6491;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        main {
            padding: 2rem 0;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 20px auto;
        }
        article {
            padding: 0 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #2c3e50;
            margin-bottom: 1.5rem;
            text-align: center;
            border-bottom: 3px solid #ffd700;
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2rem;
            color: #4a6491;
            margin: 2rem 0 1rem;
            padding-left: 10px;
            border-left: 5px solid #ffd700;
        }
        h3 {
            font-size: 1.5rem;
            color: #5d7ab9;
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #7a93cc;
            margin: 1.2rem 0 0.6rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            line-height: 1.8;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: #2c3e50;
            background: #f8f9fa;
            padding: 15px;
            border-radius: 8px;
            border-left: 4px solid #4a6491;
        }
        .highlight {
            background: #fffacd;
            padding: 2px 5px;
            border-radius: 3px;
            font-weight: bold;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .content-link {
            color: #e74c3c;
            text-decoration: none;
            border-bottom: 1px dashed #e74c3c;
            transition: color 0.3s ease;
        }
        .content-link:hover {
            color: #c0392b;
            border-bottom-style: solid;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            margin: 2rem auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .article-image:hover {
            transform: scale(1.02);
        }
        .form-section {
            background: #f8f9fa;
            padding: 20px;
            border-radius: 10px;
            margin: 30px 0;
            border: 1px solid #ddd;
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }
        .form-group {
            margin-bottom: 15px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: 600;
            color: #4a6491;
        }
        input, textarea, select {
            width: 100%;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-family: inherit;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #4a6491;
            box-shadow: 0 0 5px rgba(74, 100, 145, 0.3);
        }
        button {
            background: linear-gradient(90deg, #4a6491, #2c3e50);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease, transform 0.2s ease;
        }
        button:hover {
            background: linear-gradient(90deg, #5d7ab9, #3a506e);
            transform: translateY(-2px);
        }
        footer {
            background: #2c3e50;
            color: white;
            padding: 2rem 0;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        .footer-section h3 {
            color: #ffd700;
            font-size: 1.3rem;
            margin-bottom: 1rem;
        }
        .friend-links {
            list-style: none;
        }
        .friend-links li {
            margin-bottom: 10px;
        }
        .friend-links a {
            color: #c3cfe2;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .friend-links a:hover {
            color: #ffd700;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a6491;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
            }
            .main-nav a {
                display: block;
                margin: 5px 0;
                padding: 10px;
                background: rgba(255,255,255,0.1);
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            article {
                padding: 0 1rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .last-updated {
            font-style: italic;
            color: #666;
            background: #f1f8ff;
            padding: 10px;
            border-radius: 5px;
            display: inline-block;
            margin-bottom: 2rem;
        }