* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #222;
            background-color: #f8f9fa;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: #2c5aa0; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #1d3a6e; text-decoration: underline; }
        button, .btn {
            background-color: #2c5aa0;
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 1rem;
            transition: background-color 0.3s, transform 0.2s;
            min-height: 44px;
            min-width: 44px;
        }
        button:hover, .btn:hover {
            background-color: #1d3a6e;
            transform: translateY(-2px);
        }
        input, textarea, select {
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 1rem;
            width: 100%;
        }
        section { margin-bottom: 3rem; padding: 0 1rem; }
        .container { padding: 0 1rem; }
        header {
            background: linear-gradient(135deg, #1d3a6e 0%, #2c5aa0 100%);
            color: white;
            padding: 1rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            max-width: 1200px;
            margin: 0 auto;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a { color: white; text-decoration: none; }
        .logo a:hover { color: #ffcc00; }
        .my-logo {
            background: linear-gradient(90deg, #ffcc00, #ff9900);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 800;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        nav a {
            color: white;
            font-weight: 500;
            padding: 8px 0;
            position: relative;
        }
        nav a:hover { color: #ffcc00; }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #ffcc00;
            transition: width 0.3s;
        }
        nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            min-width: auto;
        }
        .hero {
            background: linear-gradient(rgba(29, 58, 110, 0.9), rgba(44, 90, 160, 0.9)), url('https://placeholder.com/1200x600') center/cover no-repeat;
            color: white;
            padding: 4rem 1rem;
            text-align: center;
            border-radius: 0 0 12px 12px;
            margin-bottom: 3rem;
        }
        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            padding: 1rem;
        }
        .content-area {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1 { font-size: 2.5rem; color: #1d3a6e; margin-bottom: 1.5rem; }
        h2 {
            font-size: 1.8rem;
            color: #2c5aa0;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        h3 { font-size: 1.4rem; color: #333; margin: 1.8rem 0 0.8rem; }
        h4 { font-size: 1.2rem; color: #555; margin: 1.5rem 0 0.5rem; }
        p, li { margin-bottom: 1rem; }
        ul, ol { padding-left: 1.5rem; margin-bottom: 1.5rem; }
        .lead { font-size: 1.2rem; color: #444; font-weight: 500; }
        .highlight { background-color: #fffacd; padding: 2px 5px; border-radius: 3px; }
        .note {
            background-color: #e8f4fd;
            border-left: 4px solid #2c5aa0;
            padding: 1rem;
            margin: 1.5rem 0;
            border-radius: 0 6px 6px 0;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 4px 8px rgba(0,0,0,0.08);
            transition: transform 0.3s, box-shadow 0.3s;
            border: 1px solid #eee;
        }
        .card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
        .card-img { height: 200px; background: #ddd; }
        .card-content { padding: 1.5rem; }
        .card-title { font-size: 1.3rem; color: #1d3a6e; margin-bottom: 0.8rem; }
        .form-group { margin-bottom: 1.2rem; }
        .form-label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        .rating-stars { display: flex; gap: 5px; margin: 1rem 0; }
        .rating-stars i { color: #ddd; cursor: pointer; font-size: 1.5rem; transition: color 0.2s; }
        .rating-stars i:hover, .rating-stars i.active { color: #ffcc00; }
        .social-share {
            display: flex;
            gap: 1rem;
            margin: 2rem 0;
            flex-wrap: wrap;
        }
        .social-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            color: white;
            font-size: 1.2rem;
        }
        .fb { background-color: #3b5998; }
        .tw { background-color: #1da1f2; }
        .wa { background-color: #25d366; }
        .social-btn:hover { transform: scale(1.1); color: white; }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: #2c5aa0;
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s, visibility 0.3s;
        }
        .back-to-top.visible { opacity: 1; visibility: visible; }
        footer {
            background-color: #1d3a6e;
            color: white;
            padding: 3rem 1rem 1.5rem;
            margin-top: 3rem;
            border-radius: 12px 12px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 { color: #ffcc00; border: none; font-size: 1.3rem; }
        .footer-section ul { list-style: none; padding-left: 0; }
        .footer-section a { color: #ccc; }
        .footer-section a:hover { color: white; }
        friend-link {
            display: block;
            margin: 5px 0;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            main { grid-template-columns: 1fr; }
            .sidebar { position: static; }
        }
        @media (max-width: 768px) {
            .header-container { flex-direction: column; align-items: flex-start; }
            nav { width: 100%; margin-top: 1rem; }
            nav ul { flex-direction: column; gap: 0.5rem; display: none; }
            nav ul.active { display: flex; }
            .hamburger { display: block; align-self: flex-end; margin-top: -40px; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
        }
        @media (max-width: 480px) {
            .grid-2 { grid-template-columns: 1fr; }
            .card-img { height: 180px; }
            .social-share { justify-content: center; }
        }