:root {
            --primary-blue: #1e3a8a;
            --accent-orange: #f97316;
            --dark-bg: #0f172a;
            --light-bg: #f8fafc;
            --text-dark: #1e293b;
            --text-light: #cbd5e1;
            --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: var(--light-bg);
            color: var(--text-dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-blue) 100%);
            padding: 1rem 5%;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo a {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            background: linear-gradient(to right, #fff, var(--accent-orange));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.5px;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--text-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: white;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--accent-orange);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            padding: 0.5rem 1rem;
            backdrop-filter: blur(10px);
        }
        .search-box input {
            background: transparent;
            border: none;
            color: white;
            padding: 0.5rem;
            width: 200px;
            outline: none;
        }
        .search-box button {
            background: none;
            border: none;
            color: var(--accent-orange);
            cursor: pointer;
            font-size: 1.1rem;
        }
        .breadcrumb {
            padding: 1rem 5%;
            background-color: #e2e8f0;
            font-size: 0.9rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: var(--primary-blue);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-wrapper {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 5%;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        article {
            background: white;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: var(--card-shadow);
            overflow: hidden;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark-bg);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid var(--accent-orange);
            padding-left: 1.5rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-blue);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        h3 {
            font-size: 1.5rem;
            color: var(--dark-bg);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #475569;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--primary-blue);
            background: #f1f5f9;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid var(--accent-orange);
            margin-bottom: 2.5rem;
        }
        .highlight {
            background: linear-gradient(120deg, #fef3c7 0%, #fef3c7 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        img.featured {
            width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            transition: transform 0.5s ease;
        }
        img.featured:hover {
            transform: scale(1.008);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
            margin-bottom: 2rem;
            border-top: 1px solid #e2e8f0;
            border-bottom: 1px solid #e2e8f0;
            color: #64748b;
            font-size: 0.95rem;
        }
        .update-time {
            color: var(--accent-orange);
            font-weight: 600;
        }
        aside {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: var(--card-shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            color: var(--primary-blue);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-orange);
        }
        .quick-links ul {
            list-style: none;
        }
        .quick-links li {
            margin-bottom: 0.8rem;
        }
        .quick-links a {
            color: var(--text-dark);
            text-decoration: none;
            display: block;
            padding: 0.8rem;
            border-radius: 6px;
            background: #f8fafc;
            transition: var(--transition);
            border-left: 4px solid transparent;
        }
        .quick-links a:hover {
            background: #e0f2fe;
            border-left-color: var(--accent-orange);
            padding-left: 1.2rem;
        }
        .user-interaction {
            background: #f1f5f9;
            border-radius: 12px;
            padding: 2rem;
            margin: 3rem 0;
        }
        .interaction-form {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--primary-blue);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.8rem;
            border: 1px solid #cbd5e1;
            border-radius: 6px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--accent-orange);
            box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.2);
        }
        .btn {
            background: linear-gradient(to right, var(--primary-blue), #3b82f6);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            grid-column: span 2;
            justify-self: start;
        }
        .btn:hover {
            background: linear-gradient(to right, #1e40af, var(--accent-orange));
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
            margin-top: 0.5rem;
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #fbbf24;
        }
        footer {
            background: var(--dark-bg);
            color: var(--text-light);
            padding: 3rem 5% 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 3rem;
        }
        .footer-col h4 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 0.8rem;
        }
        .footer-col a {
            color: #94a3b8;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: inline-block;
            background: rgba(255, 255, 255, 0.05);
            padding: 0.5rem 1rem;
            border-radius: 6px;
            margin: 0.3rem;
            border: 1px solid #334155;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .main-wrapper {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            aside {
                position: static;
            }
            .footer-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .main-nav ul {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--dark-bg);
                flex-direction: column;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.2);
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .search-box input {
                width: 150px;
            }
            .interaction-form {
                grid-template-columns: 1fr;
            }
            .btn {
                grid-column: span 1;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            article {
                padding: 2rem;
            }
        }
        @media (max-width: 480px) {
            .footer-container {
                grid-template-columns: 1fr;
            }
            .search-box input {
                width: 120px;
            }
        }
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        article, aside {
            animation: fadeInUp 0.6s ease-out;
        }