:root {
            --primary-color: #1a73e8;
            --secondary-color: #34a853;
            --accent-color: #ea4335;
            --text-color: #333;
            --light-bg: #f8f9fa;
            --dark-bg: #202124;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--light-bg);
            overflow-x: hidden;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .header {
            background-color: var(--dark-bg);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--secondary-color);
            text-transform: uppercase;
            letter-spacing: 2px;
            font-family: 'Arial Black', sans-serif;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .my-logo:hover {
            color: white;
        }
        .nav-links {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        .nav-links a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .nav-links a:hover {
            background-color: var(--primary-color);
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.75rem 1rem;
            border-radius: 4px;
            margin-top: 1rem;
        }
        .breadcrumb a {
            color: var(--text-color);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: white;
        }
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 70px;
                right: -100%;
                flex-direction: column;
                background-color: var(--dark-bg);
                width: 100%;
                text-align: center;
                transition: var(--transition);
                padding: 2rem 0;
                gap: 1rem;
            }
            .nav-links.active {
                right: 0;
            }
            .hamburger {
                display: block;
            }
            .header-content {
                flex-wrap: wrap;
            }
        }
        .main-content {
            padding: 2rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article {
            background-color: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .article h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 0.5rem;
        }
        .article h2 {
            font-size: 2rem;
            color: var(--dark-bg);
            margin: 2rem 0 1rem;
            padding-left: 0.5rem;
            border-left: 5px solid var(--accent-color);
        }
        .article h3 {
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin: 1.5rem 0 0.75rem;
        }
        .article h4 {
            font-size: 1.2rem;
            color: #555;
            margin: 1rem 0 0.5rem;
        }
        .article p {
            margin-bottom: 1.5rem;
            text-align: justify;
            line-height: 1.8;
        }
        .article emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .article strong {
            color: var(--accent-color);
            font-weight: bold;
        }
        .article img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 1.5rem auto;
            display: block;
            box-shadow: var(--shadow);
        }
        .featured-image {
            width: 80%;
            margin: 2rem auto;
        }
        .update-time {
            font-style: italic;
            color: #666;
            margin-bottom: 2rem;
            text-align: right;
        }
        .sidebar {
            background-color: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            align-self: start;
        }
        .sidebar h3 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        .search-box, .comment-box, .rating-box {
            margin-bottom: 2rem;
        }
        .search-box input, .comment-box textarea, .rating-box select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ccc;
            border-radius: 4px;
            margin-bottom: 1rem;
            font-size: 1rem;
        }
        .search-box button, .comment-box button, .rating-box button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: bold;
            transition: var(--transition);
            width: 100%;
        }
        .search-box button:hover, .comment-box button:hover, .rating-box button:hover {
            background-color: var(--secondary-color);
        }
        .rating-stars {
            display: flex;
            justify-content: space-around;
            margin-bottom: 1rem;
            font-size: 1.5rem;
            color: #ffc107;
        }
        .footer {
            background-color: var(--dark-bg);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h3 {
            color: var(--secondary-color);
            margin-bottom: 1rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.5rem;
        }
        friend-link a {
            color: #ddd;
        }
        friend-link a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        .btn {
            display: inline-block;
            background: var(--primary-color);
            color: white;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            font-weight: bold;
            transition: var(--transition);
        }
        .btn:hover {
            background: var(--accent-color);
            transform: translateY(-3px);
        }
        .highlight {
            background-color: #fffacd;
            padding: 1rem;
            border-left: 4px solid var(--secondary-color);
            margin: 1.5rem 0;
        }
        .tag {
            display: inline-block;
            background: #e0f7fa;
            color: #00796b;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .text-center {
            text-align: center;
        }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }