:root {
            --primary: #1a73e8;
            --secondary: #ea4335;
            --accent: #34a853;
            --dark: #202124;
            --light: #f8f9fa;
            --gray: #dadce0;
            --text: #3c4043;
            --transition: all 0.3s ease;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 8px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background-color: #fff;
            max-width: 100vw;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            color: var(--dark);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1rem;
        }
        h1 { font-size: 2.8rem; margin-top: 1.5rem; }
        h2 { font-size: 2.2rem; margin-top: 2.5rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--gray); }
        h3 { font-size: 1.8rem; margin-top: 2rem; color: var(--primary); }
        h4 { font-size: 1.4rem; margin-top: 1.5rem; color: var(--secondary); }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 300;
            color: var(--dark);
            margin-bottom: 2rem;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        strong {
            font-weight: 700;
            color: var(--dark);
        }
        em {
            font-style: italic;
        }
        blockquote {
            border-left: 4px solid var(--accent);
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        header {
            background-color: var(--dark);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .my-logo:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .my-logo i {
            color: var(--accent);
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
        }
        .desktop-nav a {
            color: white;
            font-weight: 500;
        }
        .desktop-nav a:hover {
            color: var(--accent);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--dark);
            padding: 1rem;
            display: none;
            flex-direction: column;
            gap: 1rem;
            box-shadow: var(--shadow);
            z-index: 999;
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: white;
            padding: 0.5rem 0;
            border-bottom: 1px solid #333;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: var(--light);
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: var(--text);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            margin: 0 0.5rem;
            color: var(--gray);
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: white;
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        aside {
            background-color: var(--light);
            padding: 1.5rem;
            border-radius: var(--radius);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .widget {
            margin-bottom: 2rem;
        }
        .widget-title {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: var(--dark);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--gray);
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid var(--gray);
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.2);
        }
        button, .btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            display: inline-block;
        }
        button:hover, .btn:hover {
            background-color: #0d62d9;
            text-decoration: none;
            transform: translateY(-2px);
        }
        .btn-secondary {
            background-color: var(--secondary);
        }
        .btn-secondary:hover {
            background-color: #d33427;
        }
        .content-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--radius);
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
        }
        .highlight-box {
            background-color: #e8f0fe;
            border-left: 4px solid var(--primary);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .tip {
            background-color: #f3f4f6;
            padding: 1rem;
            border-radius: var(--radius);
            margin: 1.5rem 0;
            border-left: 4px solid var(--accent);
        }
        .tip i {
            color: var(--accent);
            margin-right: 0.5rem;
        }
        .interaction-section {
            margin: 3rem 0;
            padding: 2rem;
            background-color: var(--light);
            border-radius: var(--radius);
        }
        .interaction-section h3 {
            border-bottom: none;
            margin-top: 0;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: var(--gray);
            cursor: pointer;
        }
        .star-rating .star {
            transition: var(--transition);
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #ffc107;
        }
        .comment {
            padding: 1.5rem;
            border: 1px solid var(--gray);
            border-radius: var(--radius);
            margin-bottom: 1.5rem;
            background-color: white;
        }
        .comment-author {
            font-weight: bold;
            color: var(--dark);
        }
        .comment-date {
            font-size: 0.9rem;
            color: #777;
            margin-left: 1rem;
        }
        .comment-body {
            margin-top: 0.5rem;
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: white;
            border-bottom: 1px solid #444;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: white;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 0.5rem;
            background-color: #333;
            border-radius: 4px;
        }
        friend-link a {
            color: var(--accent);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #aaa;
        }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 2rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }
        .hidden { display: none; }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .lead { font-size: 1.1rem; }
            .header-container { padding: 0 1rem; }
            article, .interaction-section { padding: 1.5rem; }
        }