* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #2b2d42;
            --secondary: #8d99ae;
            --accent: #ef233c;
            --accent-light: #ff6b6b;
            --light: #edf2f4;
            --dark: #1a1a2e;
            --success: #06d6a0;
            --warning: #ffd166;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            padding-top: 80px;
        }
        h1, h2, h3, h4 {
            color: var(--primary);
            margin-bottom: 1rem;
            font-weight: 700;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--accent);
            border-bottom: 3px solid var(--accent-light);
            padding-bottom: 0.5rem;
            margin-top: 2rem;
        }
        h2 {
            font-size: 2rem;
            margin-top: 2.5rem;
            background: linear-gradient(90deg, var(--primary), transparent);
            padding: 0.8rem;
            border-left: 5px solid var(--accent);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--dark);
            margin-top: 1.8rem;
            padding-left: 0.5rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--secondary);
            margin-top: 1.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            font-size: 1.05rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary);
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo span {
            color: var(--accent);
        }
        .my-logo:hover {
            transform: scale(1.03);
            transition: var(--transition);
        }
        .desktop-nav {
            display: flex;
            gap: 30px;
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 10px 15px;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .desktop-nav a:hover {
            background-color: var(--accent);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--dark);
            padding: 20px;
            gap: 15px;
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            padding: 12px;
            border-bottom: 1px solid var(--secondary);
        }
        main {
            display: grid;
            grid-template-columns: 3fr 1fr;
            gap: 40px;
            margin: 30px auto;
        }
        article {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        aside {
            background: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .info-box {
            border: 2px solid var(--secondary);
            border-radius: var(--border-radius);
            padding: 20px;
            margin-bottom: 25px;
            background: var(--light);
        }
        .info-box h3 {
            text-align: center;
            margin-top: 0;
        }
        .info-box ul {
            list-style: none;
        }
        .info-box li {
            padding: 8px 0;
            border-bottom: 1px dashed #ccc;
        }
        .info-box strong {
            color: var(--primary);
            min-width: 120px;
            display: inline-block;
        }
        .article-img {
            width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: 25px 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .article-img:hover {
            transform: scale(1.01);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--secondary);
            margin-top: -15px;
            margin-bottom: 25px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            box-shadow: var(--shadow);
        }
        th {
            background-color: var(--primary);
            color: white;
            padding: 15px;
            text-align: left;
        }
        td {
            padding: 12px 15px;
            border-bottom: 1px solid #ddd;
        }
        tr:nth-child(even) {
            background-color: #f2f2f2;
        }
        tr:hover {
            background-color: #e6f7ff;
        }
        .form-section {
            background: var(--light);
            padding: 30px;
            border-radius: var(--border-radius);
            margin: 40px 0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--primary);
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--accent);
        }
        .btn {
            display: inline-block;
            background-color: var(--accent);
            color: white;
            padding: 14px 28px;
            border: none;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            min-width: 44px;
            min-height: 44px;
        }
        .btn:hover {
            background-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(239, 35, 60, 0.3);
        }
        .btn-secondary {
            background-color: var(--secondary);
        }
        .btn-secondary:hover {
            background-color: var(--primary);
        }
        .rating {
            display: flex;
            gap: 5px;
            margin: 15px 0;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star.active {
            color: var(--warning);
        }
        .content-section {
            margin-bottom: 40px;
            padding-bottom: 30px;
            border-bottom: 1px solid #eee;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e6f7ff, #f0f9ff);
            border-left: 5px solid #1890ff;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .warning-box {
            background: #fffbe6;
            border-left: 5px solid var(--warning);
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 25px;
            margin: 30px 0;
        }
        .tip-card {
            background: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            border-top: 4px solid var(--accent);
        }
        .internal-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin: 30px 0;
        }
        .internal-link {
            background: var(--light);
            padding: 12px 20px;
            border-radius: 50px;
            text-decoration: none;
            color: var(--primary);
            font-weight: 600;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .internal-link:hover {
            background: var(--accent);
            color: white;
            border-color: var(--accent);
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 8px;
        }
        friend-link {
            display: block;
            margin: 15px 0;
            padding: 10px;
            background: rgba(255,255,255,0.1);
            border-radius: var(--border-radius);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .text-center {
            text-align: center;
        }
        .text-accent {
            color: var(--accent);
        }
        .mb-3 {
            margin-bottom: 3rem;
        }
        .mt-3 {
            margin-top: 3rem;
        }
        .flex {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .social-share {
            position: fixed;
            bottom: 100px;
            right: 20px;
            display: flex;
            flex-direction: column;
            gap: 15px;
            z-index: 100;
        }
        .share-btn, .back-to-top {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--accent);
            color: white;
            border: none;
            font-size: 1.3rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .back-to-top {
            background: var(--primary);
        }
        .share-btn:hover, .back-to-top:hover {
            transform: translateY(-5px);
            background: var(--accent-light);
        }
        .last-updated {
            background: var(--warning);
            color: var(--dark);
            padding: 10px 20px;
            border-radius: var(--border-radius);
            margin: 20px 0;
            display: inline-block;
            font-weight: 600;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            aside {
                position: static;
            }
            h1 {
                font-size: 2.3rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .header-container {
                padding: 12px 15px;
            }
            article {
                padding: 25px;
            }
            .social-share {
                bottom: 80px;
                right: 15px;
            }
            body {
                padding-top: 70px;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .internal-links {
                justify-content: center;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .btn {
                padding: 12px 20px;
                width: 100%;
                text-align: center;
            }
            .form-section {
                padding: 20px;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .content-section {
            animation: fadeIn 0.8s ease-out;
        }