:root {
            --primary-dark: #0a0e17;
            --secondary-dark: #121826;
            --accent-blue: #00b4f0;
            --accent-purple: #9d4edd;
            --text-primary: #f0f2fc;
            --text-secondary: #b0b6d0;
            --border-color: #2a3145;
            --success-green: #4ade80;
            --card-bg: rgba(25, 30, 48, 0.8);
            --transition-fast: 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--primary-dark);
            background-image: radial-gradient(circle at 20% 30%, rgba(45, 70, 130, 0.2) 0%, transparent 20%),
                              radial-gradient(circle at 80% 70%, rgba(157, 78, 221, 0.15) 0%, transparent 20%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: var(--accent-blue);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-purple);
        }
        .site-header {
            background-color: rgba(10, 14, 23, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 1rem 2rem;
        }
        .header-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1.5rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        .breadcrumb {
            font-size: 0.9rem;
            color: var(--text-secondary);
            width: 100%;
            order: 3;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--accent-blue);
        }
        .breadcrumb i {
            margin: 0 0.5rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-blue);
            transition: width var(--transition-fast);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
        }
        .search-form-top {
            display: flex;
            order: 2;
        }
        .search-input {
            padding: 0.6rem 1rem;
            border: 1px solid var(--border-color);
            background: var(--secondary-dark);
            color: var(--text-primary);
            border-radius: 4px 0 0 4px;
            min-width: 250px;
        }
        .search-btn {
            background: var(--accent-blue);
            color: white;
            border: none;
            padding: 0.6rem 1.2rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: background-color var(--transition-fast);
        }
        .search-btn:hover {
            background: var(--accent-purple);
        }
        main {
            flex: 1;
            max-width: 1400px;
            width: 100%;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        .content-area {
            background: var(--card-bg);
            border-radius: 12px;
            padding: 3rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 1.5rem;
        }
        .sidebar-widget h3 {
            margin-bottom: 1rem;
            color: var(--accent-blue);
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 0.5rem;
        }
        h1 {
            font-size: 3.2rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            background: linear-gradient(to right, #00b4f0, #9d4edd);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        h2 {
            font-size: 2.2rem;
            margin: 3rem 0 1.5rem;
            color: var(--accent-blue);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            font-size: 1.8rem;
            margin: 2.5rem 0 1rem;
            color: var(--accent-purple);
        }
        h4 {
            font-size: 1.4rem;
            margin: 2rem 0 1rem;
            color: var(--text-secondary);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            color: var(--text-primary);
        }
        strong {
            color: var(--accent-blue);
            font-weight: 700;
        }
        em {
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        .update-time {
            color: var(--success-green);
            font-weight: 600;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 10px;
            margin: 2rem 0;
            border: 2px solid var(--border-color);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
            transition: transform var(--transition-fast);
        }
        .featured-image:hover {
            transform: scale(1.01);
        }
        .content-link {
            background: rgba(0, 180, 240, 0.1);
            border-left: 4px solid var(--accent-blue);
            padding: 0.8rem 1.2rem;
            margin: 1.5rem 0;
            border-radius: 0 6px 6px 0;
        }
        .content-link:hover {
            background: rgba(157, 78, 221, 0.1);
            border-left-color: var(--accent-purple);
        }
        blockquote {
            border-left: 5px solid var(--accent-purple);
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: var(--text-secondary);
            background: rgba(157, 78, 221, 0.05);
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        .interactive-section {
            margin: 3rem 0;
            padding: 2rem;
            background: rgba(18, 24, 38, 0.7);
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }
        .interactive-section h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            color: var(--text-secondary);
            font-weight: 600;
        }
        .form-input, .form-textarea, .form-select {
            width: 100%;
            padding: 0.8rem 1rem;
            background: var(--primary-dark);
            border: 1px solid var(--border-color);
            border-radius: 6px;
            color: var(--text-primary);
            font-size: 1rem;
            transition: border-color var(--transition-fast);
        }
        .form-input:focus, .form-textarea:focus, .form-select:focus {
            outline: none;
            border-color: var(--accent-blue);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            margin: 0.5rem 0;
        }
        .star-rating i {
            color: #4a5568;
            cursor: pointer;
            transition: color var(--transition-fast);
        }
        .star-rating i:hover, .star-rating i.active {
            color: #fbbf24;
        }
        .submit-btn {
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 6px;
            font-weight: 700;
            cursor: pointer;
            transition: opacity var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .submit-btn:hover {
            opacity: 0.9;
        }
        footer {
            background-color: var(--secondary-dark);
            border-top: 1px solid var(--border-color);
            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-logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 1rem;
        }
        .footer-heading {
            color: var(--accent-blue);
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        friend-link {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        friend-link a {
            color: var(--text-secondary);
            padding: 0.4rem 0;
            border-bottom: 1px dashed var(--border-color);
        }
        friend-link a:hover {
            color: var(--accent-blue);
            border-bottom-style: solid;
        }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        @media (max-width: 1100px) {
            main {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: -1;
                grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
                display: grid;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                padding: 1rem;
            }
            .header-container {
                flex-direction: column;
                align-items: stretch;
                gap: 1rem;
            }
            .main-nav {
                display: none;
                width: 100%;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid var(--border-color);
            }
            .main-nav a {
                display: block;
                padding: 1rem 0;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.2rem;
                right: 1rem;
            }
            .search-form-top {
                width: 100%;
                order: 3;
            }
            .search-input {
                min-width: auto;
                flex: 1;
            }
            main {
                padding: 0 1rem;
                margin: 1rem auto;
            }
            .content-area {
                padding: 1.5rem;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 1.9rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }
        }