* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a73e8;
            --secondary: #e94235;
            --accent: #fbbc04;
            --dark: #202124;
            --light: #f8f9fa;
            --gray: #5f6368;
            --border: #dadce0;
            --shadow: 0 2px 10px rgba(0,0,0,0.1);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--dark);
            background: var(--light);
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 16px;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
        }
        .container {
            width: 100%;
            padding: 0 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            min-height: 44px;
            min-width: 44px;
            transition: var(--transition);
        }
        .btn:hover {
            background: #0d62d9;
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .btn-secondary {
            background: var(--secondary);
        }
        .btn-secondary:hover {
            background: #d23c31;
        }
        .section {
            padding: 48px 0;
            border-bottom: 1px solid var(--border);
        }
        .section:last-child {
            border-bottom: none;
        }
        header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 16px 0;
        }
        .header-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }
        .logo {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo span {
            color: var(--secondary);
        }
        .logo a {
            color: inherit;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 24px;
            flex-wrap: wrap;
        }
        nav a {
            font-weight: 600;
            padding: 8px 12px;
            border-radius: var(--radius);
        }
        nav a:hover, nav a.active {
            background: rgba(26, 115, 232, 0.1);
            color: var(--primary);
        }
        .hamburger {
            display: none;
            font-size: 24px;
            background: none;
            border: none;
            cursor: pointer;
            min-width: 44px;
            min-height: 44px;
        }
        .hero {
            background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
            color: white;
            padding: 64px 0;
            border-radius: var(--radius);
            margin: 24px 0;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 16px;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 32px;
            opacity: 0.9;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 32px 0;
        }
        .content-area {
            background: white;
            padding: 32px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        aside {
            background: white;
            padding: 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1 {
            font-size: 2.5rem;
            margin-bottom: 24px;
            color: var(--dark);
            line-height: 1.2;
        }
        h2 {
            font-size: 1.8rem;
            margin: 32px 0 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--primary);
            color: var(--dark);
        }
        h3 {
            font-size: 1.4rem;
            margin: 24px 0 12px;
            color: var(--dark);
        }
        h4 {
            font-size: 1.1rem;
            margin: 20px 0 8px;
            color: var(--gray);
        }
        p, li {
            margin-bottom: 16px;
            color: var(--gray);
        }
        ul, ol {
            padding-left: 24px;
            margin-bottom: 24px;
        }
        li {
            margin-bottom: 8px;
        }
        .highlight {
            background: #e8f0fe;
            border-left: 4px solid var(--primary);
            padding: 16px;
            margin: 24px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
            margin: 32px 0;
        }
        .card {
            background: white;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            transition: var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-4px);
        }
        .card-icon {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 16px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            background: white;
            box-shadow: var(--shadow);
            border-radius: var(--radius);
            overflow: hidden;
        }
        th, td {
            padding: 16px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }
        th {
            background: #f1f3f4;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        form {
            background: #f8f9fa;
            padding: 24px;
            border-radius: var(--radius);
            margin: 24px 0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        input, select, textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 16px;
            transition: var(--transition);
        }
        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.2);
        }
        .rating {
            display: flex;
            gap: 8px;
            margin: 16px 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 24px;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: var(--accent);
        }
        .social-share {
            display: flex;
            gap: 12px;
            margin: 32px 0;
        }
        .social-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #f1f3f4;
            color: var(--gray);
            transition: var(--transition);
        }
        .social-btn:hover {
            transform: scale(1.1);
            color: white;
        }
        .facebook:hover { background: #1877f2; }
        .twitter:hover { background: #1da1f2; }
        .whatsapp:hover { background: #25d366; }
        .telegram:hover { background: #0088cc; }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: var(--shadow);
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }
        footer {
            background: var(--dark);
            color: white;
            padding: 48px 0 24px;
            margin-top: 64px;
            border-radius: var(--radius) var(--radius) 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-links h3 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #bdc1c6;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 8px;
        }
        .copyright {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid #3c4043;
            color: #9aa0a6;
            font-size: 0.9rem;
        }
        friend-link {
            display: block;
            margin: 16px 0;
            padding: 12px;
            background: rgba(255,255,255,0.05);
            border-radius: var(--radius);
        }
        @media (max-width: 1024px) {
            main {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 12px;
                margin-top: 20px;
            }
            nav ul.show {
                display: flex;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 20px;
                right: 16px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero {
                padding: 40px 20px;
            }
            .content-area, aside {
                padding: 24px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .social-share {
                justify-content: center;
                flex-wrap: wrap;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 12px;
            }
            .section {
                padding: 32px 0;
            }
            .btn {
                width: 100%;
                margin-bottom: 12px;
            }
        }
        .text-center { text-align: center; }
        .mb-24 { margin-bottom: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-32 { margin-bottom: 32px; }
        .d-flex { display: flex; }
        .align-center { align-items: center; }
        .justify-between { justify-content: space-between; }
        .gap-16 { gap: 16px; }
        .badge {
            display: inline-block;
            padding: 4px 12px;
            background: var(--accent);
            color: var(--dark);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-left: 8px;
        }
        .update-time {
            font-size: 0.9rem;
            color: var(--gray);
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            gap: 8px;
        }