* { 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: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        h1, h2, h3, h4 { font-family: Georgia, 'Times New Roman', Times, serif; color: #2c3e50; margin-bottom: 1rem; }
        h1 { font-size: 2.8rem; border-bottom: 3px solid #3498db; padding-bottom: 10px; margin-top: 1.5rem; }
        h2 { font-size: 2.2rem; color: #2980b9; margin-top: 2.5rem; }
        h3 { font-size: 1.8rem; color: #16a085; margin-top: 2rem; }
        h4 { font-size: 1.4rem; color: #8e44ad; margin-top: 1.5rem; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        a { color: #3498db; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #e74c3c; text-decoration: underline; }
        strong { color: #c0392b; }
        em { font-style: italic; color: #7f8c8d; }
        .lead { font-size: 1.2rem; font-weight: bold; color: #2c3e50; }
        .container { width: 100%; padding: 0 15px; }
        header { background: #2c3e50; padding: 1rem 0; border-radius: 0 0 10px 10px; margin-bottom: 2rem; }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: #3498db;
            text-transform: uppercase;
            letter-spacing: 2px;
        }
        .my-logo:hover { color: #1abc9c; text-decoration: none; }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li { margin-left: 1.5rem; }
        .nav-links a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 5px;
        }
        .nav-links a:hover {
            background: #3498db;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: #ecf0f1;
            background: none;
            border: none;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 0.8rem 1rem;
            background: #ecf0f1;
            border-radius: 5px;
            margin: 1rem 0;
        }
        .breadcrumb a { color: #7f8c8d; }
        .breadcrumb a:hover { color: #3498db; }
        main { display: grid; grid-template-columns: 3fr 1fr; gap: 2rem; margin-bottom: 3rem; }
        @media (max-width: 768px) {
            main { grid-template-columns: 1fr; }
        }
        .content-area { background: #fff; padding: 2rem; border-radius: 10px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        .sidebar {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 5px solid #3498db;
        }
        article section { margin-bottom: 3rem; }
        .highlight {
            background: #fffde7;
            padding: 1.5rem;
            border-left: 5px solid #f1c40f;
            margin: 1.5rem 0;
        }
        .img-container {
            text-align: center;
            margin: 2rem 0;
        }
        .feature-img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            transition: transform 0.5s;
        }
        .feature-img:hover { transform: scale(1.02); }
        .form-card {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            border: 1px solid #ddd;
        }
        .form-group { margin-bottom: 1rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 5px;
            font-family: inherit;
        }
        button {
            background: #3498db;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
        }
        button:hover { background: #2980b9; }
        .star-rating { font-size: 1.5rem; color: #f1c40f; cursor: pointer; }
        .star-rating span:hover { color: #f39c12; }
        footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 2rem 0;
            border-radius: 10px 10px 0 0;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        friend-link {
            display: block;
            background: #34495e;
            padding: 1rem;
            border-radius: 5px;
            margin-bottom: 0.8rem;
        }
        friend-link a { color: #1abc9c; }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid #4a6278;
            font-size: 0.9rem;
            color: #bdc3c7;
        }
        .text-center { text-align: center; }
        .mb-2 { margin-bottom: 2rem; }
        .last-updated {
            font-size: 0.9rem;
            color: #7f8c8d;
            text-align: right;
            margin-top: 1rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
        }
        @media (max-width: 768px) {
            .header-inner { flex-direction: column; align-items: flex-start; }
            .nav-links {
                flex-direction: column;
                width: 100%;
                display: none;
                margin-top: 1rem;
            }
            .nav-links.active { display: flex; }
            .nav-links li { margin: 0.5rem 0; margin-left: 0; }
            .hamburger { display: block; align-self: flex-end; margin-top: -2.5rem; }
            .breadcrumb { font-size: 0.9rem; }
        }