:root {
            --primary: #0d47a1;
            --secondary: #ffcc00;
            --accent: #c62828;
            --light: #f5f5f5;
            --dark: #212121;
            --gray: #757575;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary), #1565c0);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 1.5px;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .my-logo i {
            margin-right: 10px;
            color: white;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 2rem;
        }
        nav ul li a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        nav ul li a:hover,
        nav ul li a.active {
            color: var(--secondary);
            border-bottom-color: var(--secondary);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: var(--light);
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:last-child {
            color: var(--dark);
            font-weight: 600;
        }
        .breadcrumb span {
            margin: 0 8px;
            color: var(--gray);
        }
        main {
            padding: 2rem 0;
        }
        article {
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid var(--secondary);
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--light);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--dark);
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--gray);
            margin: 1.5rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary);
            background-color: #e3f2fd;
            padding: 1rem;
            border-radius: var(--border-radius);
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fffde7;
            padding: 1.5rem;
            border-left: 4px solid var(--secondary);
            margin: 1.5rem 0;
            font-style: italic;
        }
        .img-container {
            margin: 2rem auto;
            text-align: center;
        }
        .img-container img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .caption {
            font-size: 0.9rem;
            color: var(--gray);
            margin-top: 0.5rem;
            font-style: italic;
        }
        ul, ol {
            margin: 1rem 0 1rem 2rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        strong {
            color: var(--primary);
        }
        em {
            color: var(--accent);
        }
        .keyword-link {
            font-weight: 600;
            color: var(--accent);
            border-bottom: 1px dashed var(--accent);
        }
        .interactive-section {
            background: linear-gradient(to right, #f8f9fa, #e9ecef);
            padding: 2rem;
            border-radius: var(--border-radius);
            margin: 3rem 0;
        }
        .interactive-section h3 {
            color: var(--primary);
        }
        form {
            display: grid;
            gap: 1rem;
            margin-top: 1rem;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
        }
        button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            justify-self: start;
        }
        button:hover {
            background-color: var(--accent);
            transform: translateY(-2px);
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 0.5rem 0;
        }
        .stars i {
            color: #ddd;
            cursor: pointer;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .stars i:hover,
        .stars i.active {
            color: var(--secondary);
        }
        .update-time {
            text-align: right;
            font-size: 0.9rem;
            color: var(--gray);
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px solid #eee;
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: var(--secondary);
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 1rem;
            background-color: rgba(255,255,255,0.05);
            border-radius: var(--border-radius);
        }
        friend-link a {
            color: var(--secondary);
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: var(--primary);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                box-shadow: var(--shadow);
            }
            nav ul.show {
                display: flex;
            }
            nav ul li {
                margin: 0.5rem 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            article {
                padding: 1.5rem;
            }
        }