* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1a237e;
            --secondary-color: #00bcd4;
            --accent-color: #ff9800;
            --text-color: #333;
            --light-bg: #f5f7fa;
            --dark-bg: #0d1520;
            --border-color: #e1e5eb;
            --success-color: #4caf50;
            --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --container-width: 1200px;
            --mobile-breakpoint: 768px;
        }
        body {
            font-family: var(--font-primary);
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--light-bg);
            font-size: 16px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-color) 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--secondary-color);
            text-decoration: none;
            letter-spacing: 1px;
            text-transform: uppercase;
            background: linear-gradient(90deg, #00bcd4, #4fc3f7);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .nav-link:hover {
            background-color: rgba(255,255,255,0.15);
            color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: white;
            padding: 0.8rem 1rem;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .container {
            max-width: var(--container-width);
            margin: 2rem auto;
            padding: 0 1rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        .main-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        h1 {
            color: var(--primary-color);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 0.5rem;
        }
        h2 {
            color: var(--dark-bg);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.8rem;
            border-left: 5px solid var(--accent-color);
        }
        h3 {
            color: var(--primary-color);
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: #555;
            font-size: 1.2rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.2rem;
            color: #444;
            font-weight: 500;
            background-color: #f0f8ff;
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 4px solid var(--secondary-color);
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .feature-image {
            width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 1.5rem 0;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            transition: transform 0.4s ease;
        }
        .feature-image:hover {
            transform: translateY(-5px);
        }
        .internal-link {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted var(--secondary-color);
            transition: all 0.3s ease;
        }
        .internal-link:hover {
            color: var(--secondary-color);
            border-bottom-style: solid;
        }
        .widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }
        .widget h3 {
            margin-top: 0;
            color: var(--primary-color);
            font-size: 1.3rem;
        }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-family: inherit;
            font-size: 0.95rem;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 2px rgba(0,188,212,0.2);
        }
        button, .btn {
            background: linear-gradient(135deg, var(--primary-color), #283593);
            color: white;
            border: none;
            padding: 0.9rem 1.5rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        button:hover, .btn:hover {
            background: linear-gradient(135deg, #283593, var(--primary-color));
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .stars {
            display: flex;
            gap: 0.3rem;
            margin: 0.5rem 0;
        }
        .star {
            color: #ddd;
            cursor: pointer;
            font-size: 1.5rem;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .site-footer {
            background-color: var(--dark-bg);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 1rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        friend-link a {
            color: #b3e5fc;
            text-decoration: none;
        }
        friend-link:hover {
            background: rgba(255,255,255,0.2);
            transform: translateY(-2px);
        }
        .copyright {
            text-align: center;
            font-size: 0.9rem;
            color: #aaa;
            padding-top: 1.5rem;
        }
        .update-time {
            background-color: #e8f5e9;
            color: #2e7d32;
            padding: 0.8rem;
            border-radius: 6px;
            margin: 1.5rem 0;
            font-weight: 600;
            text-align: center;
        }
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 2.3rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--dark-bg);
                flex-direction: column;
                padding: 1rem;
                box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            }
            .main-nav.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-container {
                padding: 0.5rem 1rem;
            }
            .main-content {
                padding: 1.5rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
        }
        @media print {
            .site-header, .sidebar, .site-footer, .breadcrumb {
                display: none;
            }
            .container {
                grid-template-columns: 1fr;
                margin: 0;
                padding: 0;
            }
            .main-content {
                box-shadow: none;
                padding: 0;
            }
        }