* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-red: #E53935;
            --primary-blue: #1E88E5;
            --primary-yellow: #FFD600;
            --primary-green: #43A047;
            --primary-purple: #8E24AA;
            --dark-bg: #1A1A2E;
            --light-bg: #F8F9FA;
            --text-dark: #2D3748;
            --text-light: #F7FAFC;
            --accent-color: #FF6B35;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 12px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--light-bg);
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #16213E 100%);
            color: var(--text-light);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: 'Comic Sans MS', cursive, sans-serif;
            font-size: 2.2rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .my-logo span:nth-child(1) { color: var(--primary-red); }
        .my-logo span:nth-child(2) { color: var(--primary-blue); }
        .my-logo span:nth-child(3) { color: var(--primary-yellow); }
        .my-logo span:nth-child(4) { color: var(--primary-green); }
        .breadcrumb {
            background: rgba(255, 255, 255, 0.1);
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #90CAF9;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-nav {
            display: flex;
            gap: 1.5rem;
            align-items: center;
        }
        .nav-link {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 25px;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .nav-link.active {
            background: var(--accent-color);
            color: white;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .search-form {
            display: flex;
            margin-left: 1rem;
        }
        .search-input {
            padding: 0.6rem 1rem;
            border: none;
            border-radius: 25px 0 0 25px;
            width: 250px;
            font-size: 0.95rem;
            background: rgba(255, 255, 255, 0.9);
        }
        .search-btn {
            background: var(--accent-color);
            color: white;
            border: none;
            border-radius: 0 25px 25px 0;
            padding: 0 1.2rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: #FF5722;
        }
        .main-container {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 1024px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            border-radius: var(--border-radius);
            padding: 3rem;
            box-shadow: var(--shadow);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 2px solid #E2E8F0;
            color: #718096;
            font-size: 0.9rem;
        }
        .update-time {
            color: var(--accent-color);
            font-weight: 600;
        }
        h1 {
            font-size: 3rem;
            color: var(--dark-bg);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            text-align: center;
            background: linear-gradient(90deg, var(--primary-red), var(--primary-blue), var(--primary-green));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary-blue);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--primary-yellow);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--primary-green);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--primary-purple);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .lead-paragraph {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--dark-bg);
            background: linear-gradient(90deg, #FFECB3, #FFF);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 5px solid var(--primary-yellow);
            margin-bottom: 2.5rem;
        }
        .keyword-highlight {
            background: linear-gradient(120deg, #FFECB3 0%, #FFECB3 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .pro-tip {
            background: #E3F2FD;
            border-left: 4px solid var(--primary-blue);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .pro-tip i {
            color: var(--primary-blue);
            margin-right: 0.5rem;
        }
        .rule-variation {
            background: #F3E5F5;
            border: 2px dashed var(--primary-purple);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: var(--border-radius);
        }
        .content-link {
            color: var(--primary-blue);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted var(--primary-blue);
            transition: var(--transition);
        }
        .content-link:hover {
            color: var(--primary-red);
            border-bottom-style: solid;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--border-radius);
            margin: 2rem auto;
            display: block;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            transition: transform 0.5s ease;
        }
        .article-image:hover {
            transform: scale(1.01);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .sidebar {
            background: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            box-shadow: var(--shadow);
            position: sticky;
            top: 120px;
            height: fit-content;
        }
        .sidebar-section {
            margin-bottom: 2.5rem;
        }
        .sidebar-title {
            font-size: 1.3rem;
            color: var(--dark-bg);
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
        }
        .quick-nav {
            list-style: none;
        }
        .quick-nav li {
            margin-bottom: 0.8rem;
        }
        .quick-nav a {
            color: var(--text-dark);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.8rem;
            padding: 0.7rem;
            border-radius: 8px;
            transition: var(--transition);
        }
        .quick-nav a:hover {
            background: #EDF2F7;
            color: var(--primary-blue);
            transform: translateX(5px);
        }
        .user-interaction {
            background: white;
            border-radius: var(--border-radius);
            padding: 2.5rem;
            margin-top: 3rem;
            box-shadow: var(--shadow);
        }
        .interaction-title {
            font-size: 1.8rem;
            color: var(--dark-bg);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .rating-system {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
        }
        .star {
            font-size: 1.8rem;
            color: #E2E8F0;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #FFD700;
            transform: scale(1.1);
        }
        .comment-form,
        .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
            margin-bottom: 2.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-input,
        .form-textarea {
            padding: 0.9rem 1.2rem;
            border: 2px solid #E2E8F0;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus,
        .form-textarea:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.2);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(135deg, var(--primary-blue), #1565C0);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-btn:hover {
            background: linear-gradient(135deg, #1565C0, var(--primary-blue));
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(21, 101, 192, 0.3);
        }
        .site-footer {
            background: var(--dark-bg);
            color: var(--text-light);
            padding: 3rem 2rem 2rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
        }
        .friend-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .friend-links a {
            color: #90CAF9;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .friend-links a:hover {
            color: white;
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #A0AEC0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container {
                padding: 0 1rem;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                margin-top: 1rem;
                padding: 1rem 0;
                border-top: 1px solid rgba(255, 255, 255, 0.2);
            }
            .main-nav.active {
                display: flex;
            }
            .search-form {
                margin-left: 0;
                width: 100%;
                margin-top: 1rem;
            }
            .search-input {
                width: 100%;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .main-container {
                padding: 0 1rem;
                gap: 2rem;
            }
            .user-interaction {
                padding: 1.5rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out forwards;
        }
        @media print {
            .site-header, .sidebar, .user-interaction, .site-footer {
                display: none;
            }
            body {
                background: white;
                color: black;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
        }