* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #0057B8;
            --secondary-color: #1D428A;
            --accent-color: #00A9E0;
            --text-color: #333333;
            --light-gray: #f8f9fa;
            --medium-gray: #e9ecef;
            --dark-gray: #6c757d;
            --white: #ffffff;
            --black: #000000;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--white);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: var(--white);
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--white);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            width: 30px;
            height: 21px;
            justify-content: space-between;
        }
        .hamburger span {
            height: 3px;
            width: 100%;
            background-color: var(--white);
            border-radius: 3px;
            transition: var(--transition);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: var(--white);
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        nav a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .breadcrumb {
            background-color: var(--light-gray);
            padding: 1rem 0;
            border-bottom: 1px solid var(--medium-gray);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .separator {
            color: var(--dark-gray);
        }
        main {
            padding: 2rem 0;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        article {
            background-color: var(--white);
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--primary-color);
            margin: 1.5rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--dark-gray);
            margin: 1.2rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--primary-color);
            margin-bottom: 2rem;
            padding: 1rem;
            background-color: var(--light-gray);
            border-left: 4px solid var(--accent-color);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        strong {
            color: var(--secondary-color);
            font-weight: 700;
        }
        em {
            font-style: italic;
            color: var(--dark-gray);
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            margin: 2rem auto;
            display: block;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .callout {
            background-color: #e8f4fc;
            border-left: 5px solid var(--accent-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .warning {
            background-color: #fff3cd;
            border-left: 5px solid #ffc107;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tip {
            background-color: #d1ecf1;
            border-left: 5px solid #0dcaf0;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        ul, ol {
            margin-left: 1.5rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        a:not(.my-logo):not(nav a):not(.breadcrumb a) {
            color: var(--primary-color);
            text-decoration: none;
            border-bottom: 1px dotted var(--primary-color);
            transition: var(--transition);
        }
        a:not(.my-logo):not(nav a):not(.breadcrumb a):hover {
            color: var(--secondary-color);
            border-bottom: 2px solid var(--secondary-color);
        }
        aside {
            background-color: var(--white);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        .sidebar-section {
            margin-bottom: 2rem;
        }
        .sidebar-section h3 {
            font-size: 1.2rem;
            margin-bottom: 1rem;
            color: var(--secondary-color);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--medium-gray);
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.75rem;
            border: 1px solid var(--medium-gray);
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary-color);
            color: var(--white);
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--secondary-color);
        }
        .rating-form, .comment-form {
            background-color: var(--light-gray);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-top: 2rem;
        }
        .rating-form h3, .comment-form h3 {
            margin-top: 0;
        }
        .star-rating {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.5rem;
            color: var(--medium-gray);
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #ffc107;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid var(--medium-gray);
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-family: inherit;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        button[type="submit"] {
            background-color: var(--primary-color);
            color: var(--white);
            border: none;
            padding: 0.75rem 2rem;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        button[type="submit"]:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
        }
        .update-time {
            background-color: var(--light-gray);
            padding: 1rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            text-align: center;
            font-style: italic;
            color: var(--dark-gray);
        }
        footer {
            background-color: #1a1a1a;
            color: var(--white);
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: var(--white);
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-section ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-section li {
            margin-bottom: 0.75rem;
        }
        .footer-section a {
            color: #cccccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-section a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: #2a2a2a;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-bottom: 1.5rem;
        }
        friend-link h3 {
            color: var(--accent-color);
            margin-bottom: 1rem;
        }
        friend-link ul {
            list-style: none;
            margin-left: 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
        }
        friend-link a {
            color: #cccccc;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        friend-link a:hover {
            color: var(--accent-color);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            color: #999;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--primary-color);
                padding: 1rem;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                z-index: 999;
                box-shadow: var(--shadow);
            }
            nav.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            nav ul {
                flex-direction: column;
                gap: 0;
            }
            nav a {
                display: block;
                padding: 1rem;
                border-radius: 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            article {
                padding: 1.5rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @media print {
            header, nav, aside, .search-form, .rating-form, .comment-form, footer {
                display: none;
            }
            body {
                font-size: 12pt;
                line-height: 1.4;
            }
            .container, article {
                width: 100%;
                max-width: 100%;
                padding: 0;
                margin: 0;
                box-shadow: none;
            }
        }