:root {
            --primary-color: #1e3a8a;
            --secondary-color: #3b82f6;
            --accent-color: #f59e0b;
            --text-color: #1f2937;
            --light-bg: #f8fafc;
            --white: #ffffff;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--light-bg);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--white);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .search-form {
            display: flex;
            max-width: 400px;
            flex-grow: 1;
            margin: 0 2rem;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.75rem 1rem;
            border: 2px solid #e5e7eb;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--secondary-color);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            text-decoration: none;
            color: var(--text-color);
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        nav a:hover {
            color: var(--primary-color);
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--primary-color);
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f1f5f9;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--secondary-color);
            text-decoration: none;
        }
        .breadcrumb span {
            color: #64748b;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            padding: 2rem 0;
        }
        article {
            background: var(--white);
            padding: 2rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        h1 {
            color: var(--primary-color);
            font-size: 2.5rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        h2 {
            color: var(--primary-color);
            font-size: 1.8rem;
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e5e7eb;
        }
        h3 {
            color: var(--secondary-color);
            font-size: 1.4rem;
            margin: 1.5rem 0 1rem;
        }
        h4 {
            color: var(--text-color);
            font-size: 1.1rem;
            margin: 1rem 0 0.5rem;
        }
        p {
            margin-bottom: 1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid var(--accent-color);
            margin: 1.5rem 0;
        }
        .feature-image {
            width: 100%;
            max-height: 400px;
            object-fit: cover;
            border-radius: 12px;
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
        }
        .rating-widget {
            background: linear-gradient(135deg, #f8fafc, #e0f2fe);
            padding: 1.5rem;
            border-radius: 12px;
            text-align: center;
            margin: 2rem 0;
        }
        .stars {
            color: var(--accent-color);
            font-size: 1.5rem;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars i {
            transition: var(--transition);
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .download-steps {
            display: grid;
            gap: 1rem;
            margin: 2rem 0;
        }
        .step {
            background: var(--light-bg);
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid var(--secondary-color);
        }
        .step-number {
            background-color: var(--primary-color);
            color: white;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-right: 10px;
        }
        .related-links {
            background: var(--light-bg);
            padding: 1.5rem;
            border-radius: 12px;
            margin: 2rem 0;
        }
        .related-links h3 {
            margin-top: 0;
        }
        .related-links ul {
            list-style: none;
            columns: 2;
            gap: 1rem;
        }
        .related-links li {
            margin-bottom: 0.75rem;
        }
        .related-links a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        .related-links a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        aside {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .sidebar-widget {
            background: var(--white);
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .update-time {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 1rem;
            border-radius: 8px;
            text-align: center;
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .comment-form input,
        .comment-form textarea {
            padding: 0.75rem;
            border: 1px solid #e5e7eb;
            border-radius: 8px;
            font-family: inherit;
        }
        .comment-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            text-align: center;
            text-decoration: none;
            display: inline-block;
        }
        .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
        }
        .btn-accent {
            background-color: var(--accent-color);
        }
        .btn-accent:hover {
            background-color: #d97706;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            display: block;
            margin-bottom: 0.5rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.1);
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem 0;
        }
        friend-link a {
            color: white;
            text-decoration: none;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #cbd5e1;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-links ul {
                columns: 1;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                width: 100%;
                margin: 1rem 0 0;
            }
            nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 80px);
                background-color: var(--white);
                transition: var(--transition);
                z-index: 999;
            }
            nav.active {
                left: 0;
            }
            nav ul {
                flex-direction: column;
                padding: 2rem;
                gap: 1.5rem;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 576px) {
            .footer-content {
                grid-template-columns: 1fr;
            }
            article {
                padding: 1.5rem;
            }
        }