:root {
            --primary-dark: #1a237e;
            --primary-main: #283593;
            --primary-light: #5c6bc0;
            --accent: #ff5722;
            --text-primary: #212121;
            --text-secondary: #757575;
            --background: #f5f5f5;
            --surface: #ffffff;
            --border: #e0e0e0;
            --success: #4caf50;
            --warning: #ff9800;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--background);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 1.05rem;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary-dark);
            color: white;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            letter-spacing: 1px;
            background: linear-gradient(90deg, #fff, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        nav a:hover, nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: #ffcc80;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: var(--text-secondary);
            background-color: var(--surface);
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb a {
            color: var(--primary-main);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb i {
            margin: 0 8px;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .content-area {
            background-color: var(--surface);
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
        }
        aside {
            background-color: var(--surface);
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-dark);
            margin-bottom: 25px;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-main);
            margin: 40px 0 20px;
            padding-left: 10px;
            border-left: 5px solid var(--primary-light);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--text-primary);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--text-secondary);
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            color: var(--primary-main);
            font-weight: 500;
            padding: 15px;
            background-color: rgba(92, 107, 192, 0.08);
            border-radius: 8px;
            margin-bottom: 30px;
        }
        b, strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        em {
            color: var(--accent);
            font-style: italic;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            padding: 25px;
            border-radius: 10px;
            border-left: 5px solid var(--accent);
            margin: 30px 0;
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 8px;
        }
        .article-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            margin: 25px auto;
            display: block;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            transition: transform 0.5s ease;
        }
        .article-img:hover {
            transform: scale(1.01);
        }
        .module {
            background-color: #f8f9fa;
            border-radius: 10px;
            padding: 25px;
            margin: 35px 0;
            border: 1px solid var(--border);
        }
        .module h3 {
            margin-top: 0;
            color: var(--primary-dark);
        }
        .search-box, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        input, textarea, select {
            padding: 14px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(92, 107, 192, 0.2);
        }
        button, .btn {
            background-color: var(--primary-main);
            color: white;
            border: none;
            padding: 14px 24px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
            text-decoration: none;
            display: inline-block;
        }
        button:hover, .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0, 0, 0, 0.1);
        }
        .stars {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ffd700;
            margin: 10px 0;
        }
        .stars i {
            cursor: pointer;
            transition: color 0.2s;
        }
        .stars i:hover {
            color: #ffed4e;
        }
        .update-time {
            text-align: right;
            font-style: italic;
            color: var(--text-secondary);
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px dashed var(--border);
        }
        .sidebar-links {
            list-style: none;
            margin-left: 0;
        }
        .sidebar-links li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px solid #eee;
        }
        .sidebar-links a {
            color: var(--primary-main);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color 0.3s;
        }
        .sidebar-links a:hover {
            color: var(--accent);
        }
        footer {
            background-color: var(--primary-dark);
            color: white;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h4 {
            color: #ffcc80;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #e0e0e0;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 15px;
            border-radius: 6px;
            margin: 10px 0;
        }
        friend-link a {
            color: #bbdefb;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #bdbdbd;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            nav ul {
                flex-direction: column;
                width: 100%;
                background-color: var(--primary-main);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 20px;
                display: none;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                border-top: 1px solid rgba(255,255,255,0.1);
            }
            nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .content-area {
                padding: 25px;
            }
            main {
                gap: 25px;
            }
        }