* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
        html { scroll-behavior: smooth; }
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            color: #2c3e50;
            line-height: 1.8;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #2980b9; text-decoration: none; transition: all 0.3s ease; }
        a:hover { color: #e74c3c; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header { background: #2c3e50; 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: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #3498db, #9b59b6);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: 1px;
        }
        .my-logo a { color: inherit; text-decoration: none; }
        .nav-toggle { display: none; font-size: 1.8rem; cursor: pointer; }
        nav ul { display: flex; list-style: none; gap: 2rem; }
        nav a { color: #ecf0f1; font-weight: 600; padding: 0.5rem 1rem; border-radius: 4px; }
        nav a:hover { background: #3498db; text-decoration: none; }
        .breadcrumb { padding: 1rem 0; background: #ecf0f1; font-size: 0.9rem; }
        .breadcrumb a { color: #7f8c8d; }
        .breadcrumb span { color: #34495e; }
        main { flex: 1; padding: 2rem 0; }
        article { background: white; border-radius: 12px; padding: 2.5rem; box-shadow: 0 6px 20px rgba(0,0,0,0.08); margin-bottom: 2rem; }
        h1 { font-size: 2.8rem; color: #2c3e50; margin-bottom: 1.5rem; border-left: 6px solid #e74c3c; padding-left: 1rem; }
        h2 { font-size: 2rem; color: #2980b9; margin: 2.5rem 0 1rem; padding-bottom: 0.5rem; border-bottom: 2px dashed #bdc3c7; }
        h3 { font-size: 1.6rem; color: #16a085; margin: 2rem 0 1rem; }
        h4 { font-size: 1.3rem; color: #8e44ad; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.2rem; text-align: justify; }
        .highlight { background: #fffde7; padding: 1.5rem; border-left: 4px solid #f1c40f; margin: 1.5rem 0; border-radius: 0 8px 8px 0; }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background: linear-gradient(145deg, #dfe6e9, #ffffff);
            padding: 1.5rem;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
            transition: transform 0.3s;
        }
        .stat-card:hover { transform: translateY(-5px); }
        .stat-card i { font-size: 2.5rem; color: #3498db; margin-bottom: 1rem; }
        .feature-img {
            width: 80%;
            margin: 2rem auto;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            border: 5px solid #fff;
        }
        .interactive-section {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin: 2.5rem 0;
            border: 1px solid #e9ecef;
        }
        .interactive-section h3 { margin-top: 0; }
        form { display: grid; gap: 1rem; }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-size: 1rem;
            width: 100%;
        }
        button {
            background: linear-gradient(90deg, #27ae60, #2ecc71);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            font-size: 1.1rem;
            transition: background 0.3s;
        }
        button:hover { background: linear-gradient(90deg, #219653, #27ae60); }
        .rating { display: flex; gap: 0.5rem; margin: 1rem 0; }
        .rating i { color: #f39c12; cursor: pointer; font-size: 1.8rem; }
        .links-box {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 2rem 0;
            justify-content: center;
        }
        .links-box a {
            background: #3498db;
            color: white;
            padding: 0.7rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
        }
        .links-box a:hover {
            background: #2980b9;
            text-decoration: none;
            transform: scale(1.05);
        }
        footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 2.5rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 { color: #3498db; margin-bottom: 1rem; }
        friend-link {
            display: block;
            padding: 0.5rem 0;
            border-bottom: 1px dashed #7f8c8d;
        }
        friend-link a { color: #bdc3c7; }
        friend-link a:hover { color: #3498db; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #2c3e50;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            nav.active ul { display: flex; }
            .header-content { flex-wrap: wrap; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            article { padding: 1.5rem; }
            .feature-img { width: 100%; }
        }