* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(90deg, #1a237e 0%, #311b92 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffeb3b;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i { color: #00bcd4; }
        .search-box {
            display: flex;
            background: white;
            border-radius: 30px;
            overflow: hidden;
            width: 300px;
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 12px 20px;
            font-size: 1rem;
            outline: none;
        }
        .search-box button {
            background: #ff4081;
            color: white;
            border: none;
            padding: 0 20px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-box button:hover { background: #f50057; }
        nav { background: rgba(0, 0, 0, 0.2); }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: relative;
        }
        .main-nav {
            display: flex;
            list-style: none;
        }
        .main-nav li { position: relative; }
        .main-nav a {
            color: white;
            text-decoration: none;
            padding: 18px 22px;
            display: block;
            font-weight: 600;
            transition: all 0.3s;
            border-bottom: 3px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background: rgba(255, 255, 255, 0.15);
            border-bottom-color: #00bcd4;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 10px;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: #bdbdbd;
        }
        .breadcrumb a {
            color: #ffeb3b;
            text-decoration: none;
        }
        .breadcrumb span { margin: 0 8px; }
        main { flex: 1; padding: 40px 0; }
        article {
            background: white;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            padding: 40px;
            margin-bottom: 40px;
        }
        h1 {
            color: #1a237e;
            font-size: 2.8rem;
            margin-bottom: 25px;
            line-height: 1.2;
            border-left: 6px solid #ff4081;
            padding-left: 20px;
        }
        h2 {
            color: #311b92;
            font-size: 2rem;
            margin: 45px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px dashed #00bcd4;
        }
        h3 {
            color: #1a237e;
            font-size: 1.5rem;
            margin: 30px 0 15px;
        }
        p {
            margin-bottom: 22px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: #555;
            background: #f0f8ff;
            padding: 20px;
            border-radius: 10px;
            border-left: 4px solid #00bcd4;
            margin-bottom: 30px;
        }
        .highlight {
            background: linear-gradient(120deg, #ffeb3b44 0%, #ffeb3b44 100%);
            padding: 3px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .img-container {
            margin: 30px auto;
            text-align: center;
            max-width: 800px;
        }
        .feature-img {
            width: 100%;
            height: auto;
            border-radius: 12px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            transition: transform 0.5s;
        }
        .feature-img:hover { transform: scale(1.02); }
        .img-caption {
            font-style: italic;
            color: #666;
            margin-top: 10px;
            font-size: 0.95rem;
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 25px;
        }
        li { margin-bottom: 10px; }
        blockquote {
            border-left: 5px solid #ff4081;
            background: #f9f9f9;
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 10px 10px 0;
            font-style: italic;
            color: #555;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 25px;
            margin: 30px 0;
        }
        .stat-card {
            background: linear-gradient(145deg, #e3f2fd, #f3e5f5);
            padding: 25px;
            border-radius: 12px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s;
        }
        .stat-card:hover { transform: translateY(-5px); }
        .stat-card i { font-size: 2.5rem; color: #673ab7; margin-bottom: 15px; }
        .stat-number { font-size: 2.8rem; font-weight: 800; color: #1a237e; display: block; }
        .interactive-section {
            background: #f8fdff;
            border: 2px solid #b3e5fc;
            border-radius: 12px;
            padding: 30px;
            margin: 40px 0;
        }
        .form-group {
            margin-bottom: 25px;
        }
        label {
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
            color: #1a237e;
        }
        input, textarea, select {
            width: 100%;
            padding: 15px;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
            font-family: inherit;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #00bcd4;
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.2);
        }
        .btn {
            display: inline-block;
            background: linear-gradient(90deg, #00bcd4, #0097a7);
            color: white;
            padding: 15px 30px;
            border: none;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            text-decoration: none;
            text-align: center;
        }
        .btn:hover {
            background: linear-gradient(90deg, #0097a7, #00838f);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0, 188, 212, 0.3);
        }
        .rating {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active { color: #ffeb3b; }
        .longtail-links {
            background: #e8eaf6;
            padding: 40px 0;
            margin-top: 40px;
        }
        .web-link {
            display: inline-block;
            margin: 10px 20px 10px 0;
            background: white;
            padding: 12px 25px;
            border-radius: 30px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
            transition: all 0.3s;
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            background: #1a237e;
        }
        .web-link a {
            color: #311b92;
            text-decoration: none;
            font-weight: 600;
        }
        .web-link:hover a { color: white; }
        footer {
            background: #1a237e;
            color: #e8eaf6;
            padding: 50px 0 20px;
            margin-top: auto;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo { font-size: 2rem; font-weight: 800; color: #ffeb3b; }
        .footer-links a {
            color: #bdbdbd;
            display: block;
            margin-bottom: 12px;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover { color: #00bcd4; }
        .copyright {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid #3949ab;
            color: #9fa8da;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            .search-box { width: 250px; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #311b92;
                z-index: 999;
                box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            }
            .main-nav.active { display: flex; }
            .main-nav li { width: 100%; }
            .main-nav a { padding: 18px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
            .header-top { flex-wrap: wrap; }
            .search-box { order: 3; width: 100%; margin-top: 20px; }
            article { padding: 25px; }
            .stats-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            .container { padding: 0 15px; }
            .btn { width: 100%; }
        }