* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-dark: #1a1a1a;
            --secondary-dark: #2d2d2d;
            --accent-orange: #e67e22;
            --accent-red: #c0392b;
            --text-primary: #f5f5f5;
            --text-secondary: #cccccc;
            --border-color: #444;
            --link-color: #3498db;
            --card-bg: #252525;
            --transition-speed: 0.3s;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-primary);
            background-color: var(--primary-dark);
            max-width: 1920px;
            margin: 0 auto;
        }
        .site-header {
            background-color: var(--secondary-dark);
            padding: 1rem 2rem;
            border-bottom: 3px solid var(--accent-orange);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-orange);
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: color var(--transition-speed);
        }
        .my-logo:hover {
            color: #ff9a3c;
        }
        .my-logo span {
            color: var(--text-primary);
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all var(--transition-speed);
        }
        .main-nav a:hover {
            color: var(--accent-orange);
            background-color: rgba(230, 126, 34, 0.1);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: var(--text-primary);
            transition: var(--transition-speed);
        }
        .breadcrumb {
            padding: 1rem 2rem;
            background-color: var(--card-bg);
            font-size: 0.9rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb a {
            color: var(--link-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .search-container {
            max-width: 800px;
            margin: 2rem auto;
            padding: 0 2rem;
        }
        .search-box {
            display: flex;
            gap: 0;
        }
        .search-box input {
            flex: 1;
            padding: 1rem;
            border: 2px solid var(--border-color);
            background-color: var(--card-bg);
            color: var(--text-primary);
            font-size: 1rem;
            border-right: none;
            border-radius: 4px 0 0 4px;
        }
        .search-box button {
            padding: 1rem 1.5rem;
            background-color: var(--accent-orange);
            color: white;
            border: none;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: background-color var(--transition-speed);
        }
        .search-box button:hover {
            background-color: #d35400;
        }
        .main-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        article {
            background-color: var(--card-bg);
            border-radius: 8px;
            padding: 2.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--accent-orange);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: #f5f5f5;
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-red);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--text-secondary);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #bbbbbb;
            margin: 1.5rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .highlight {
            background-color: rgba(230, 126, 34, 0.15);
            border-left: 4px solid var(--accent-orange);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 4px 4px 0;
        }
        .update-time {
            color: #95a5a6;
            font-size: 0.9rem;
            margin-bottom: 2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .content-image {
            width: 100%;
            height: auto;
            border-radius: 6px;
            margin: 2rem 0;
            border: 1px solid var(--border-color);
        }
        .sidebar {
            background-color: var(--card-bg);
            border-radius: 8px;
            padding: 1.5rem;
            height: fit-content;
        }
        .sidebar h3 {
            margin-top: 0;
        }
        .sidebar-links {
            list-style: none;
        }
        .sidebar-links li {
            margin-bottom: 0.8rem;
        }
        .sidebar-links a {
            color: var(--link-color);
            text-decoration: none;
            display: block;
            padding: 0.5rem;
            border-radius: 4px;
            transition: background-color var(--transition-speed);
        }
        .sidebar-links a:hover {
            background-color: rgba(52, 152, 219, 0.1);
        }
        .user-interaction {
            background-color: var(--secondary-dark);
            border-radius: 8px;
            padding: 2rem;
            margin: 3rem 0;
        }
        .rating-system {
            display: flex;
            gap: 1rem;
            align-items: center;
            margin: 1.5rem 0;
        }
        .star-rating {
            color: #f1c40f;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .star-rating:hover {
            color: #f39c12;
        }
        .comment-form textarea,
        .rating-form select {
            width: 100%;
            padding: 1rem;
            margin: 1rem 0;
            background-color: var(--primary-dark);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            border-radius: 4px;
            font-family: inherit;
        }
        .submit-btn {
            background-color: var(--accent-orange);
            color: white;
            padding: 0.8rem 1.5rem;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: background-color var(--transition-speed);
        }
        .submit-btn:hover {
            background-color: #d35400;
        }
        .site-footer {
            background-color: var(--secondary-dark);
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
            border-top: 3px solid var(--accent-red);
        }
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
        }
        friend-link a {
            color: var(--link-color);
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-color);
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .header-container {
                flex-wrap: wrap;
            }
            h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 1rem;
                padding-top: 1rem;
                border-top: 1px solid var(--border-color);
            }
            .main-nav.active {
                display: flex;
            }
            .hamburger {
                display: flex;
            }
            .hamburger.active span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }
            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }
            .hamburger.active span:nth-child(3) {
                transform: rotate(-45deg) translate(7px, -6px);
            }
            .main-content,
            .site-header,
            .breadcrumb {
                padding: 1rem;
            }
            article {
                padding: 1.5rem;
            }
            h1 {
                font-size: 2rem;
            }
        }
        a {
            color: var(--link-color);
            text-decoration: none;
            transition: color var(--transition-speed);
        }
        a:hover {
            color: #5dade2;
        }
        .timeline-item {
            padding: 1.5rem;
            margin: 1.5rem 0;
            background: linear-gradient(145deg, #2a2a2a, #252525);
            border-radius: 6px;
            border-left: 4px solid transparent;
            transition: transform var(--transition-speed), border-left-color var(--transition-speed);
        }
        .timeline-item:hover {
            transform: translateX(5px);
            border-left-color: var(--accent-orange);
        }
        .stat-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .stat {
            background-color: rgba(52, 152, 219, 0.1);
            padding: 1.5rem;
            border-radius: 6px;
            text-align: center;
            transition: transform var(--transition-speed);
        }
        .stat:hover {
            transform: translateY(-5px);
        }
        .stat-value {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent-orange);
            display: block;
        }
        .emoji {
            font-size: 1.2em;
            margin: 0 0.2rem;
        }
        .key-term {
            color: var(--accent-orange);
            font-weight: 600;
        }
        .quote {
            font-style: italic;
            padding: 1.5rem;
            margin: 2rem 0;
            background-color: rgba(44, 62, 80, 0.3);
            border-left: 4px solid #3498db;
            border-radius: 0 4px 4px 0;
        }
        .developer-note {
            background-color: rgba(231, 76, 60, 0.1);
            border: 1px solid #e74c3c;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 6px;
        }