:root {
            --primary-color: #1e88e5;
            --secondary-color: #ff9800;
            --dark-color: #121212;
            --light-color: #f4f4f4;
            --gray-color: #333;
            --light-gray: #e0e0e0;
            --success-color: #4caf50;
            --warning-color: #ff5722;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            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-color: var(--light-color);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--dark-color);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            color: var(--secondary-color);
            font-size: 1.8rem;
            font-weight: 800;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: var(--transition);
        }
        .logo a:hover {
            color: white;
            text-shadow: 0 0 8px var(--secondary-color);
        }
        .logo span {
            color: var(--primary-color);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li {
            margin-left: 2rem;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-links a:hover {
            color: var(--secondary-color);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: width 0.3s ease;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            cursor: pointer;
            font-size: 1.5rem;
            color: white;
        }
        .breadcrumb {
            background-color: var(--gray-color);
            padding: 0.8rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--light-gray);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: var(--secondary-color);
        }
        .breadcrumb span {
            color: #aaa;
            margin: 0 5px;
        }
        main {
            padding: 2rem 0;
            background-color: white;
        }
        article {
            max-width: 900px;
            margin: 0 auto;
            padding: 2rem;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        h1 {
            color: var(--dark-color);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--primary-color);
            padding-bottom: 0.5rem;
        }
        h2 {
            color: var(--primary-color);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px dashed var(--light-gray);
        }
        h3 {
            color: var(--gray-color);
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            padding: 1.5rem;
            border-left: 5px solid var(--primary-color);
            border-radius: var(--border-radius);
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fff8e1;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--warning-color);
            margin: 2rem 0;
        }
        .meta-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .meta-card {
            background: var(--light-color);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .meta-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .meta-card h4 {
            color: var(--primary-color);
            margin-bottom: 0.8rem;
            font-size: 1.3rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 2rem auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        img:hover {
            transform: scale(1.01);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -1.5rem;
            margin-bottom: 2rem;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
        }
        a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .internal-links {
            background-color: #e3f2fd;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
        }
        .internal-links ul {
            columns: 2;
            list-style-position: inside;
        }
        .internal-links li {
            margin-bottom: 0.5rem;
        }
        .quote {
            font-style: italic;
            font-size: 1.2rem;
            color: var(--gray-color);
            border-left: 4px solid var(--secondary-color);
            padding-left: 1.5rem;
            margin: 2.5rem 1rem;
        }
        .author {
            text-align: right;
            font-weight: bold;
            color: var(--dark-color);
        }
        .interactive-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            margin: 3rem 0;
            text-align: center;
        }
        .interactive-section h3 {
            color: white;
            margin-bottom: 1.5rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
            text-align: left;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: none;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            background-color: rgba(255,255,255,0.9);
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }
        button:hover {
            background-color: #e68900;
            transform: translateY(-2px);
        }
        .rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: var(--light-gray);
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: gold;
            transform: scale(1.2);
        }
        .score-display {
            font-size: 1.5rem;
            font-weight: bold;
            color: var(--secondary-color);
            margin-top: 1rem;
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h4 {
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ccc;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: #222;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-top: 1.5rem;
        }
        friend-link h4 {
            color: var(--secondary-color);
            margin-bottom: 1rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid var(--gray-color);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.3rem; }
            h2 { font-size: 1.8rem; }
            .meta-box { grid-template-columns: 1fr; }
            .internal-links ul { columns: 1; }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 70px;
                right: -100%;
                flex-direction: column;
                background-color: var(--dark-color);
                width: 80%;
                max-width: 300px;
                height: calc(100vh - 70px);
                padding: 2rem;
                transition: right 0.5s ease;
                box-shadow: -5px 0 15px rgba(0,0,0,0.2);
            }
            .nav-links.active {
                right: 0;
            }
            .nav-links li {
                margin: 1rem 0;
            }
            .header-content {
                padding: 0 1rem;
            }
            article {
                padding: 1.5rem;
            }
            .interactive-section {
                padding: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            h1 { font-size: 1.9rem; }
            .intro { font-size: 1.1rem; padding: 1rem; }
            .quote { margin: 2rem 0; padding-left: 1rem; }
            .footer-content { grid-template-columns: 1fr; }
        }
        .text-center { text-align: center; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 2rem; }
        .bold { font-weight: 700; }
        .emoji { font-size: 1.2em; }