:root {
            --primary-dark: #1a365d;
            --primary-main: #2d50a3;
            --primary-light: #4f83cc;
            --accent-gold: #d4af37;
            --accent-red: #c53030;
            --neutral-dark: #2d3748;
            --neutral-mid: #718096;
            --neutral-light: #edf2f7;
            --neutral-white: #ffffff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 8px 20px rgba(0, 0, 0, 0.12);
            --border-radius: 8px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            color: var(--neutral-dark);
            line-height: 1.7;
            font-size: 18px;
        }
        .site-header {
            background: var(--primary-dark);
            color: var(--neutral-white);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            text-decoration: none;
            color: var(--accent-gold);
            letter-spacing: 1px;
            background: linear-gradient(90deg, var(--accent-gold), #ffed4e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            transition: var(--transition);
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--neutral-light);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--accent-gold);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent-gold);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--neutral-white);
            cursor: pointer;
        }
        .breadcrumb {
            background: var(--neutral-light);
            padding: 1rem 20px;
            font-size: 0.95rem;
            border-bottom: 1px solid #d1d9e6;
        }
        .breadcrumb-container {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb a {
            color: var(--primary-main);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--neutral-mid);
        }
        .search-container {
            background: var(--neutral-white);
            padding: 2rem 20px;
            border-bottom: 1px solid #e2e8f0;
        }
        .search-box {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .search-box input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-box button {
            background: var(--primary-main);
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: var(--primary-dark);
        }
        .main-container {
            max-width: var(--max-width);
            margin: 3rem auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .content-area {
            background: var(--neutral-white);
            border-radius: var(--border-radius);
            padding: 3rem;
            box-shadow: var(--shadow);
        }
        .sidebar {
            background: var(--neutral-white);
            border-radius: var(--border-radius);
            padding: 2rem;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1 {
            color: var(--primary-dark);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent-gold);
            padding-bottom: 0.5rem;
        }
        h2 {
            color: var(--primary-main);
            font-size: 2.2rem;
            margin: 2.5rem 0 1.2rem;
            padding-top: 0.5rem;
        }
        h3 {
            color: var(--neutral-dark);
            font-size: 1.7rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: var(--neutral-mid);
            font-size: 1.4rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--primary-dark);
            background: var(--neutral-light);
            padding: 1.5rem;
            border-left: 5px solid var(--accent-gold);
            border-radius: var(--border-radius);
            margin-bottom: 2.5rem;
        }
        .highlight {
            background: linear-gradient(120deg, #fffbcc 0%, #fffbcc 100%);
            padding: 0.2rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }
        strong {
            color: var(--primary-dark);
        }
        em {
            color: var(--accent-red);
            font-style: italic;
        }
        a.content-link {
            color: var(--primary-main);
            text-decoration: none;
            border-bottom: 1px dotted var(--primary-light);
            transition: var(--transition);
        }
        a.content-link:hover {
            color: var(--accent-red);
            border-bottom: 1px solid var(--accent-red);
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .featured-image {
            width: 100%;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .featured-image:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--neutral-mid);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .info-box {
            background: #e6f2ff;
            border-left: 5px solid var(--primary-main);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: var(--border-radius);
        }
        .tip-box {
            background: #f0fff4;
            border-left: 5px solid #38a169;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: var(--border-radius);
        }
        .warning-box {
            background: #fff5f5;
            border-left: 5px solid var(--accent-red);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: var(--border-radius);
        }
        .rating-section, .comment-section {
            background: var(--neutral-light);
            padding: 2.5rem;
            border-radius: var(--border-radius);
            margin-top: 3rem;
        }
        .rating-container {
            display: flex;
            align-items: center;
            gap: 2rem;
            flex-wrap: wrap;
            margin-bottom: 2rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
        }
        .star {
            font-size: 2rem;
            color: #e2e8f0;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #f6ad55;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        input, textarea, select {
            padding: 1rem;
            border: 1px solid #cbd5e0;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-main);
            box-shadow: 0 0 0 3px rgba(45, 80, 163, 0.1);
        }
        button[type="submit"] {
            background: var(--primary-main);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--border-radius);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        button[type="submit"]:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        .sidebar h3 {
            font-size: 1.5rem;
            margin-top: 0;
            color: var(--primary-dark);
            border-bottom: 2px solid var(--neutral-light);
            padding-bottom: 0.5rem;
        }
        .related-links {
            list-style: none;
            margin: 1.5rem 0;
        }
        .related-links li {
            margin-bottom: 1rem;
        }
        .related-links a {
            display: block;
            padding: 0.8rem 1rem;
            background: var(--neutral-light);
            color: var(--primary-dark);
            text-decoration: none;
            border-radius: var(--border-radius);
            transition: var(--transition);
            border-left: 4px solid transparent;
        }
        .related-links a:hover {
            background: var(--primary-light);
            color: white;
            border-left-color: var(--accent-gold);
            transform: translateX(5px);
        }
        .update-info {
            background: #fef3c7;
            padding: 1rem;
            border-radius: var(--border-radius);
            font-size: 0.95rem;
            margin-top: 2rem;
        }
        .site-footer {
            background: var(--primary-dark);
            color: var(--neutral-white);
            padding: 3rem 20px;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h4 {
            color: var(--accent-gold);
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-gold);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 1.5rem 0;
        }
        friend-link a {
            color: var(--accent-gold);
            text-decoration: none;
            font-weight: 600;
            display: block;
            text-align: center;
            transition: var(--transition);
        }
        friend-link a:hover {
            color: white;
            transform: scale(1.05);
        }
        .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 {
                height: 70px;
            }
            .my-logo {
                font-size: 1.8rem;
            }
            .main-nav ul {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--primary-dark);
                flex-direction: column;
                align-items: center;
                padding: 2rem;
                gap: 1.5rem;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                box-shadow: var(--shadow);
            }
            .main-nav ul.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .hamburger {
                display: block;
            }
            .content-area {
                padding: 2rem 1.5rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            body {
                font-size: 16px;
            }
            .main-container {
                gap: 2rem;
                margin: 2rem auto;
            }
            .sidebar {
                position: static;
            }
        }