:root {
            --primary-color: #1a73e8;
            --secondary-color: #34a853;
            --accent-color: #fbbc05;
            --dark-color: #202124;
            --light-color: #f8f9fa;
            --gray-color: #dadce0;
            --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-family);
            line-height: 1.6;
            color: var(--dark-color);
            background-color: var(--light-color);
            padding: 0;
            margin: 0;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--secondary-color);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--dark-color);
            color: white;
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: bold;
            color: var(--accent-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo a {
            color: inherit;
        }
        .my-logo i {
            font-size: 2.5rem;
        }
        .breadcrumb {
            margin-top: 10px;
            font-size: 0.9rem;
            color: var(--gray-color);
        }
        .breadcrumb a {
            color: var(--accent-color);
        }
        .breadcrumb span {
            margin: 0 5px;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .nav-links a {
            color: white;
            font-weight: 500;
            padding: 5px 10px;
            border-radius: 4px;
        }
        .nav-links a:hover {
            background-color: var(--primary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        main {
            padding: 30px 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .content {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        aside {
            background: white;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin: 30px 0 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--gray-color);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--dark-color);
            margin: 25px 0 10px;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--primary-color);
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .highlight {
            background-color: #fff9c4;
            padding: 15px;
            border-left: 4px solid var(--accent-color);
            margin: 20px 0;
            font-style: italic;
        }
        strong {
            color: var(--primary-color);
        }
        em {
            color: var(--secondary-color);
        }
        ul, ol {
            margin-left: 20px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 8px;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 20px 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .figure-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -10px;
            margin-bottom: 20px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }
        input, textarea, select {
            width: 100%;
            padding: 10px;
            border: 1px solid var(--gray-color);
            border-radius: 5px;
            font-family: inherit;
        }
        button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            transition: background-color 0.3s ease;
        }
        button:hover {
            background-color: var(--secondary-color);
        }
        .rating {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .rating i {
            color: var(--gray-color);
            cursor: pointer;
            font-size: 1.5rem;
            transition: color 0.2s;
        }
        .rating i:hover,
        .rating i.active {
            color: var(--accent-color);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        .footer-section h3 {
            color: var(--accent-color);
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            list-style: none;
        }
        .friend-links a {
            color: var(--gray-color);
            padding: 5px 10px;
            background: rgba(255,255,255,0.1);
            border-radius: 4px;
        }
        .friend-links a:hover {
            background: var(--primary-color);
            color: white;
        }
        .copyright {
            text-align: center;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: var(--gray-color);
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-links {
                flex-direction: column;
                gap: 10px;
                display: none;
                width: 100%;
                margin-top: 20px;
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 20px;
                right: 20px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        .last-updated {
            font-size: 0.9rem;
            color: #666;
            margin-bottom: 20px;
            text-align: right;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .section-nav {
            background: #f1f8ff;
            padding: 15px;
            border-radius: 8px;
            margin: 20px 0;
        }
        .section-nav ul {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            list-style: none;
            margin: 0;
        }
        .section-nav a {
            color: var(--primary-color);
            font-weight: 500;
        }