:root {
            --primary: #2a5c9a;
            --secondary: #d32f2f;
            --accent: #ffc107;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul, ol { list-style-position: inside; margin-left: 1rem;}
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(135deg, var(--primary), #1a365f);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--accent);
        }
        .logo span { color: white; }
        .desktop-nav ul {
            display: flex;
            gap: 2rem;
        }
        .desktop-nav a {
            font-weight: 600;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .desktop-nav a:hover, .desktop-nav a.active {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--accent);
        }
        .mobile-nav {
            display: none;
            background-color: var(--primary);
            padding: 1rem;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active { display: block; }
        .mobile-nav ul { display: flex; flex-direction: column; gap: 1rem;}
        .mobile-nav a { display: block; padding: 0.75rem; border-left: 3px solid transparent;}
        .mobile-nav a:hover { background: rgba(255,255,255,0.1); border-left-color: var(--accent);}
        .breadcrumb {
            max-width: 1200px;
            margin: 1rem auto;
            padding: 0 1.5rem;
            font-size: 0.9rem;
            color: var(--gray);
        }
        .breadcrumb a:hover { color: var(--primary); text-decoration: underline;}
        .container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .container { grid-template-columns: 1fr; }
        }
        article {
            background: var(--light);
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px dashed var(--gray);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--primary);
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--dark);
            background: #e9f5ff;
            padding: 1.5rem;
            border-left: 5px solid var(--primary);
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid var(--accent);
            margin: 2rem 0;
        }
        .strategy-box {
            background: white;
            border: 2px solid var(--primary);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .quote {
            font-style: italic;
            color: var(--gray);
            padding: 2rem;
            border-left: 4px solid var(--secondary);
            background: #f8f8f8;
            margin: 2rem 0;
        }
        .author { text-align: right; font-weight: bold; color: var(--dark); margin-top: 1rem;}
        .image-container {
            margin: 2.5rem auto;
            text-align: center;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.15);
            border: 5px solid white;
        }
        .caption {
            font-size: 0.9rem;
            color: var(--gray);
            margin-top: 0.5rem;
            font-style: italic;
        }
        emoji { font-size: 1.2em; margin-right: 0.3rem; }
        .keyword { font-weight: 700; color: var(--primary);}
        .term { font-style: italic; color: var(--secondary); font-weight: 600;}
        aside {
            background: #f1f8ff;
            border-radius: 12px;
            padding: 2rem;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            color: var(--secondary);
            margin-bottom: 1.2rem;
            font-size: 1.4rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #ccc;
        }
        .search-box form {
            display: flex;
        }
        .search-box input {
            flex: 1;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-box button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover { background: #1a4a7a;}
        .rating-widget .stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
            font-size: 1.8rem;
            color: var(--gray);
        }
        .stars i { cursor: pointer; transition: var(--transition);}
        .stars i:hover, .stars i.active { color: var(--accent);}
        .rating-form input, .rating-form textarea, .comment-form textarea {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-family: inherit;
        }
        .rating-form button, .comment-form button {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .rating-form button:hover, .comment-form button:hover { background: #b71c1c;}
        .table-contents ul { list-style: none; margin-left: 0;}
        .table-contents li { margin-bottom: 0.8rem; padding-left: 0;}
        .table-contents a { color: var(--dark); display: block; padding: 0.5rem 0; border-left: 3px solid transparent;}
        .table-contents a:hover { color: var(--primary); border-left-color: var(--primary); padding-left: 0.5rem;}
        .footer-links {
            max-width: 1200px;
            margin: 3rem auto 0;
            padding: 2.5rem 1.5rem;
            background: #1a365f;
            color: white;
            border-radius: 12px 12px 0 0;
        }
        .footer-links h3 {
            color: var(--accent);
            text-align: center;
            margin-bottom: 2rem;
            font-size: 1.8rem;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: rgba(255,255,255,0.05);
            padding: 1.2rem;
            border-radius: 8px;
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255,255,255,0.1);
            transform: translateY(-3px);
        }
        .web-link a {
            color: #b3d4fc;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .web-link a:hover { color: white; text-decoration: underline;}
        .site-footer {
            background: #0d1c33;
            color: #b3d4fc;
            padding: 2.5rem 1.5rem;
            text-align: center;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .copyright {
            font-size: 0.95rem;
            border-top: 1px solid #2a5c9a;
            padding-top: 2rem;
            color: #8bb5f0;
        }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .hamburger { display: block; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .container { padding: 0 1rem; }
            article { padding: 1.8rem; }
            .intro { font-size: 1.1rem; padding: 1.2rem;}
        }
        @media (max-width: 480px) {
            html { font-size: 14px; }
            .header-container { padding: 0 1rem;}
            .logo { font-size: 1.7rem;}
        }