:root {
            --primary-bg: #0a0a0a;
            --secondary-bg: #1a1a1a;
            --accent-color: #9d0000;
            --accent-hover: #c20000;
            --text-primary: #f0f0f0;
            --text-secondary: #b0b0b0;
            --border-color: #333;
            --spacing-unit: 1rem;
            --border-radius: 6px;
            --transition-speed: 0.3s;
        }
        * {
            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;
            background-color: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--accent-color);
            text-decoration: none;
            transition: color var(--transition-speed);
        }
        a:hover {
            color: var(--accent-hover);
        }
        .site-header {
            background-color: var(--secondary-bg);
            border-bottom: 2px solid var(--accent-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: var(--spacing-unit) 0;
        }
        .header-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: -1px;
            color: var(--text-primary);
        }
        .my-logo span {
            color: var(--accent-color);
        }
        .my-logo:hover {
            color: var(--accent-color);
        }
        .my-logo:hover span {
            color: var(--text-primary);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            padding: 0.5rem;
            border-radius: var(--border-radius);
        }
        .main-nav a:hover {
            background-color: rgba(157, 0, 0, 0.1);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            max-width: 1280px;
            margin: 1rem auto;
            padding: 0 2rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--text-primary);
        }
        .search-container {
            max-width: 1280px;
            margin: 2rem auto;
            padding: 0 2rem;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid var(--border-color);
            border-right: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            background-color: var(--secondary-bg);
            color: var(--text-primary);
            font-size: 1rem;
        }
        .search-input:focus {
            outline: none;
            border-color: var(--accent-color);
        }
        .search-btn {
            padding: 0 1.8rem;
            background-color: var(--accent-color);
            color: white;
            border: none;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-weight: bold;
            transition: background-color var(--transition-speed);
        }
        .search-btn:hover {
            background-color: var(--accent-hover);
        }
        .main-content {
            flex: 1;
            max-width: 1280px;
            width: 100%;
            margin: 0 auto;
            padding: 0 2rem;
        }
        article {
            background-color: var(--secondary-bg);
            border-radius: var(--border-radius);
            padding: 3rem;
            margin-bottom: 3rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }
        h1, h2, h3, h4 {
            margin-top: 2.5rem;
            margin-bottom: 1.2rem;
            line-height: 1.3;
            color: #fff;
        }
        h1 {
            font-size: 3.2rem;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 1rem;
            margin-top: 0;
        }
        h2 {
            font-size: 2.3rem;
            color: var(--accent-color);
        }
        h3 {
            font-size: 1.8rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--text-secondary);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 300;
            color: var(--text-secondary);
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: rgba(157, 0, 0, 0.15);
            border-left: 4px solid var(--accent-color);
            padding: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            border: 1px solid var(--border-color);
            margin: 2rem 0;
            display: block;
        }
        .img-caption {
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: -1.5rem;
            margin-bottom: 2rem;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        strong {
            color: #fff;
            font-weight: 700;
        }
        hr {
            border: none;
            height: 1px;
            background-color: var(--border-color);
            margin: 3rem 0;
        }
        .user-interaction {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 4rem 0;
        }
        .comment-section, .rating-section {
            background-color: rgba(0, 0, 0, 0.3);
            padding: 2rem;
            border-radius: var(--border-radius);
        }
        .interaction-title {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        .interaction-title i {
            color: var(--accent-color);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.9rem;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            background-color: var(--primary-bg);
            color: var(--text-primary);
            font-size: 1rem;
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--accent-color);
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: bold;
            transition: background-color var(--transition-speed);
            width: 100%;
        }
        .submit-btn:hover {
            background-color: var(--accent-hover);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1.5rem 0;
            font-size: 2rem;
            color: #555;
        }
        .star-rating label {
            cursor: pointer;
            margin-bottom: 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: gold;
        }
        .related-links {
            margin: 3rem 0;
            padding: 2rem;
            background-color: var(--secondary-bg);
            border-radius: var(--border-radius);
        }
        .related-links h3 {
            margin-top: 0;
        }
        .links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.2rem;
            margin-top: 1.5rem;
        }
        .links-grid a {
            display: block;
            padding: 1rem;
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: var(--border-radius);
            border-left: 3px solid transparent;
            transition: all var(--transition-speed);
        }
        .links-grid a:hover {
            background-color: rgba(157, 0, 0, 0.15);
            border-left-color: var(--accent-color);
            transform: translateX(5px);
        }
        site-footer {
            background-color: #000;
            color: var(--text-secondary);
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .footer-links {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            margin-bottom: 2rem;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #fff;
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        friend-link {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 0.5rem 1rem;
            border-radius: 20px;
            margin: 0.3rem;
            font-size: 0.9rem;
        }
        friend-link a {
            color: var(--text-secondary);
        }
        friend-link a:hover {
            color: var(--accent-color);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid var(--border-color);
            font-size: 0.9rem;
        }
        .update-time {
            color: var(--accent-color);
            font-weight: bold;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2rem; }
            .header-container { padding: 0 1.5rem; }
            .main-content, .breadcrumb, .search-container { padding: 0 1.5rem; }
            article { padding: 2rem; }
        }
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                margin-top: 1.5rem;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0.5rem;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                background-color: rgba(255, 255, 255, 0.05);
                border-radius: var(--border-radius);
            }
            .user-interaction {
                grid-template-columns: 1fr;
            }
            .footer-links {
                flex-direction: column;
            }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .header-container, .main-content, .breadcrumb, .search-container { padding: 0 1rem; }
            article { padding: 1.5rem; }
        }