:root {
            --primary: #FF6B35;
            --secondary: #1A5FB4;
            --accent: #FFC107;
            --dark: #2D2D2D;
            --light: #F5F5F5;
            --gray: #6B7280;
            --success: #10B981;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Open Sans', system-ui, -apple-system, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: all 0.3s ease;
        }
        a:hover {
            color: var(--primary);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--dark) 0%, #1a1a1a 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover {
            color: white;
        }
        .logo i {
            color: var(--primary);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        nav a:hover {
            color: var(--accent);
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--primary);
            transition: width 0.3s;
        }
        nav a:hover::after {
            width: 100%;
        }
        .breadcrumb {
            background: var(--light);
            padding: 1rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
            color: var(--gray);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        main {
            padding: 3rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        article {
            max-width: 900px;
        }
        h1, h2, h3, h4 {
            font-family: var(--font-heading);
            color: var(--dark);
            margin-bottom: 1.5rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            border-bottom: 4px solid var(--accent);
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2rem;
            margin-top: 3rem;
            color: var(--secondary);
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed var(--gray);
        }
        h3 {
            font-size: 1.5rem;
            margin-top: 2rem;
            color: var(--dark);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            background: linear-gradient(to right, var(--light), #e9f5ff);
            padding: 2rem;
            border-radius: 10px;
            border-left: 5px solid var(--primary);
            margin: 2rem 0;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid var(--accent);
            margin: 2rem 0;
        }
        .tip {
            background-color: #e8f4fd;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid var(--secondary);
            margin: 2rem 0;
        }
        .tip i {
            color: var(--secondary);
            margin-right: 10px;
        }
        .stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background: white;
            border-radius: 10px;
            padding: 1.5rem;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            border-top: 4px solid var(--primary);
            transition: transform 0.3s;
        }
        .stat-card:hover {
            transform: translateY(-5px);
        }
        .stat-card h4 {
            color: var(--primary);
            font-size: 2rem;
            margin-bottom: 0.5rem;
        }
        .stat-card p {
            color: var(--gray);
            font-size: 0.9rem;
            margin-bottom: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            display: block;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: -1rem;
            margin-bottom: 2rem;
        }
        aside {
            position: sticky;
            top: 120px;
            height: fit-content;
        }
        .sidebar-widget {
            background: var(--light);
            padding: 1.5rem;
            border-radius: 10px;
            margin-bottom: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid rgba(255,107,53,0.3);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem;
            border: 2px solid #ddd;
            border-right: none;
            border-radius: 5px 0 0 5px;
            font-family: var(--font-body);
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem 1.2rem;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #e55a2b;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s;
        }
        .star:hover,
        .star.active {
            color: var(--accent);
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid #ddd;
            border-radius: 5px;
            font-family: var(--font-body);
            margin-bottom: 1rem;
            resize: vertical;
            min-height: 120px;
        }
        .comment-form button {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
            width: 100%;
        }
        .comment-form button:hover {
            background: #154d8a;
        }
        .web-links {
            background: var(--dark);
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .web-links .container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: rgba(255,255,255,0.05);
            padding: 1.5rem;
            border-radius: 8px;
            transition: all 0.3s;
        }
        .web-link:hover {
            background: rgba(255,255,255,0.1);
            transform: translateY(-3px);
        }
        .web-link a {
            color: white;
            font-weight: 600;
            display: block;
            margin-bottom: 0.5rem;
        }
        .web-link p {
            color: #aaa;
            font-size: 0.9rem;
            margin-bottom: 0;
        }
        footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 2rem 0;
            text-align: center;
        }
        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.5rem;
        }
        .copyright {
            font-size: 0.9rem;
            color: #999;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            nav ul {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0;
                margin-top: 1rem;
            }
            nav ul.show {
                display: flex;
            }
            nav li {
                width: 100%;
                border-top: 1px solid rgba(255,255,255,0.1);
            }
            nav a {
                display: block;
                padding: 1rem;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .stats {
                grid-template-columns: 1fr;
            }
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .bold {
            font-weight: 800;
            color: var(--dark);
        }
        .keyword {
            background-color: #fff0e6;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
            color: var(--primary);
        }
        .toc {
            background: var(--light);
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ul {
            list-style: none;
            columns: 2;
        }
        .toc li {
            margin-bottom: 0.8rem;
        }
        .toc a {
            color: var(--secondary);
            display: flex;
            align-items: center;
        }
        .toc a:hover {
            color: var(--primary);
        }
        .toc i {
            margin-right: 10px;
            color: var(--primary);
        }
        @media (max-width: 768px) {
            .toc ul {
                columns: 1;
            }
        }