* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            padding: 1rem 5%;
            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;
            flex-wrap: wrap;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            color: #FFD700;
            text-decoration: none;
            font-family: 'Arial Black', sans-serif;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            letter-spacing: -1px;
        }
        .logo a span { color: #4cd964; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: color 0.3s;
        }
        .main-nav a:hover, .main-nav a.active {
            color: #FFD700;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #FFD700;
            transition: width 0.3s;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 5%;
            background: #e9ecef;
            font-size: 0.9rem;
            border-bottom: 1px solid #dee2e6;
        }
        .breadcrumb a {
            color: #2a5298;
            text-decoration: none;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        .container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 5%;
            max-width: 1600px;
            margin: 0 auto;
        }
        main { background: white; padding: 2.5rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        aside {
            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: 120px;
        }
        h1 {
            font-size: 2.8rem;
            color: #1e3c72;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #FFD700;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #2a5298;
            margin: 2.5rem 0 1rem;
            padding-left: 0.5rem;
            border-left: 5px solid #4cd964;
        }
        h3 { font-size: 1.6rem; color: #3a6bc9; margin: 2rem 0 1rem; }
        h4 { font-size: 1.3rem; color: #555; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.2rem; text-align: justify; }
        .intro { font-size: 1.2rem; font-weight: 500; color: #555; background: #f1f8ff; padding: 1.5rem; border-radius: 8px; margin-bottom: 2rem; }
        .highlight { background: linear-gradient(120deg, #ffd70044 0%, #ffd70044 100%); padding: 0.2rem 0.5rem; border-radius: 4px; font-weight: 600; }
        a.content-link {
            color: #e74c3c;
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dashed #e74c3c;
        }
        a.content-link:hover {
            color: #c0392b;
            border-bottom-style: solid;
        }
        .interactive-box {
            background: #f8f9fa;
            border: 2px solid #dee2e6;
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .interactive-box h3 { margin-top: 0; }
        .form-group { margin-bottom: 1rem; }
        .form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        .form-control {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-size: 1rem;
        }
        .btn {
            background: linear-gradient(to right, #1e3c72, #2a5298);
            color: white;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(30, 60, 114, 0.3);
        }
        .stars { font-size: 1.8rem; color: #ffd700; margin: 0.5rem 0; cursor: pointer; }
        .stars span { margin-right: 0.2rem; transition: color 0.2s; }
        .stars span:hover, .stars span.active { color: #ffa500; }
        .featured-img {
            width: 100%;
            border-radius: 10px;
            border: 5px solid #2a5298;
            margin: 2rem auto;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .sidebar-widget { margin-bottom: 2rem; }
        .sidebar-widget h4 { border-bottom: 2px solid #4cd964; padding-bottom: 0.5rem; }
        .sidebar-list { list-style: none; }
        .sidebar-list li { margin-bottom: 0.8rem; padding-bottom: 0.8rem; border-bottom: 1px dashed #eee; }
        .sidebar-list a { color: #2a5298; text-decoration: none; }
        .sidebar-list a:hover { color: #e74c3c; text-decoration: underline; }
        .site-footer {
            background: #1a1a2e;
            color: #ddd;
            padding: 3rem 5% 2rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo { font-size: 1.8rem; font-weight: 800; color: #FFD700; margin-bottom: 1rem; }
        .footer-nav a { color: #ddd; text-decoration: none; display: block; margin-bottom: 0.5rem; }
        .footer-nav a:hover { color: #4cd964; }
        friend-link {
            display: block;
            color: #FFD700;
            text-decoration: none;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 1024px) {
            .container { grid-template-columns: 1fr; }
            aside { position: static; }
        }
        @media (max-width: 768px) {
            .main-nav { display: none; width: 100%; order: 3; margin-top: 1rem; }
            .main-nav.active { display: block; }
            .main-nav ul { flex-direction: column; gap: 0.5rem; }
            .hamburger { display: block; }
            .header-container { flex-wrap: wrap; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .container { padding: 1rem; }
            main { padding: 1.5rem; }
        }