:root {
            --primary: #1a1f2e; 
            --secondary: #00a8ff; 
            --accent: #ff4656; 
            --light: #f8f9fa;
            --dark: #121826;
            --gray: #6c757d;
            --transition: all 0.3s ease;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            --border-radius: 8px;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--primary);
            color: #e0e0e0;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: rgba(18, 24, 38, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 2px solid var(--secondary);
            padding: 1rem 0;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        .nav-links a {
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent);
            transition: width 0.3s ease;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: var(--light);
            border-radius: 2px;
            transition: var(--transition);
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        .breadcrumb span {
            margin: 0 5px;
        }
        main {
            background: linear-gradient(180deg, var(--primary) 0%, var(--dark) 100%);
            padding: 2rem 0 4rem;
        }
        article {
            background-color: rgba(255, 255, 255, 0.03);
            border-radius: var(--border-radius);
            padding: 3rem;
            margin-bottom: 3rem;
            box-shadow: var(--shadow);
            border: 1px solid rgba(255, 255, 255, 0.05);
        }
        h1, h2, h3, h4 {
            color: var(--light);
            margin-top: 2rem;
            margin-bottom: 1rem;
            line-height: 1.3;
            font-weight: 700;
        }
        h1 {
            font-size: 3.2rem;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 1rem;
            margin-top: 0;
        }
        h2 {
            font-size: 2.4rem;
            color: var(--secondary);
            padding-top: 1rem;
        }
        h3 {
            font-size: 1.8rem;
            color: #b0b7c3;
        }
        h4 {
            font-size: 1.4rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            color: #b0b7c3;
            font-weight: 300;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: rgba(0, 168, 255, 0.1);
            border-left: 4px solid var(--secondary);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background-color: rgba(255, 255, 255, 0.04);
            border-radius: var(--border-radius);
            padding: 1.5rem;
            text-align: center;
            border-top: 4px solid var(--accent);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            background-color: rgba(255, 255, 255, 0.07);
        }
        .stat-card i {
            font-size: 2.5rem;
            color: var(--secondary);
            margin-bottom: 1rem;
        }
        .stat-card h4 {
            margin: 0;
            font-size: 1.1rem;
        }
        .stat-card .number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--light);
            display: block;
            margin: 0.5rem 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 2rem auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: -1.5rem;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .tooltip {
            position: relative;
            display: inline-block;
            border-bottom: 1px dotted var(--secondary);
            cursor: help;
        }
        .tooltip .tooltiptext {
            visibility: hidden;
            width: 250px;
            background-color: var(--dark);
            color: var(--light);
            text-align: center;
            border-radius: var(--border-radius);
            padding: 0.8rem;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            margin-left: -125px;
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 0.9rem;
            border: 1px solid var(--secondary);
        }
        .tooltip:hover .tooltiptext {
            visibility: visible;
            opacity: 1;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        strong {
            color: var(--light);
            font-weight: 700;
        }
        blockquote {
            font-style: italic;
            color: #a0aec0;
            border-left: 3px solid var(--accent);
            padding-left: 1.5rem;
            margin: 2rem 0;
        }
        .interactive-module {
            background: linear-gradient(135deg, rgba(26,31,46,0.9) 0%, rgba(18,24,38,0.9) 100%);
            border-radius: var(--border-radius);
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid rgba(0, 168, 255, 0.2);
        }
        .module-title {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        .module-title i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        label {
            font-weight: 600;
            color: var(--light);
        }
        input, textarea, select {
            padding: 0.9rem 1rem;
            background-color: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--border-radius);
            color: var(--light);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(0, 168, 255, 0.2);
        }
        button, .btn {
            background: linear-gradient(90deg, var(--secondary), #0097e6);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--border-radius);
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            font-size: 1rem;
        }
        button:hover, .btn:hover {
            background: linear-gradient(90deg, #0097e6, var(--secondary));
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(0, 168, 255, 0.3);
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: var(--gray);
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: gold;
        }
        footer {
            background-color: var(--dark);
            padding: 4rem 0 2rem;
            border-top: 2px solid rgba(255, 70, 86, 0.3);
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-section h3 {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            color: var(--secondary);
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
            padding: 0.5rem 0;
            border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
        }
        friend-link a {
            color: #b0b7c3;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        friend-link a:hover {
            color: var(--secondary);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--gray);
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.2rem; }
            article { padding: 2rem; }
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: var(--dark);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1.5rem;
                box-shadow: var(--shadow);
                border-top: 1px solid rgba(255,255,255,0.1);
                z-index: 999;
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: flex;
            }
            .hamburger.active span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }
            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }
            .hamburger.active span:nth-child(3) {
                transform: rotate(-45deg) translate(7px, -6px);
            }
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
            article { padding: 1.5rem; }
            .interactive-module { padding: 1.5rem; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .lead { font-size: 1.1rem; }
            .container { padding: 0 15px; }
        }