:root {
            --primary-dark: #1a365d;
            --primary: #2d4a8a;
            --primary-light: #4a6fca;
            --accent: #e6af2e;
            --accent-light: #f4d06f;
            --text-dark: #2d3748;
            --text: #4a5568;
            --text-light: #718096;
            --bg-light: #f7fafc;
            --bg-lighter: #ffffff;
            --border: #e2e8f0;
            --shadow: rgba(0, 0, 0, 0.08);
            --shadow-hover: rgba(45, 74, 138, 0.15);
            --radius: 12px;
            --transition: all 0.3s ease;
            --max-content: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            color: var(--primary-dark);
            font-weight: 800;
            line-height: 1.3;
            margin-top: 2.5rem;
            margin-bottom: 1.25rem;
        }
        h1 {
            font-size: 2.75rem;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2.1rem;
            padding-left: 0.75rem;
            border-left: 5px solid var(--primary);
        }
        h3 {
            font-size: 1.7rem;
            color: var(--primary);
        }
        h4 {
            font-size: 1.35rem;
            color: var(--text-dark);
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            h4 { font-size: 1.2rem; }
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
            border-bottom: 1px dotted transparent;
        }
        a:hover {
            color: var(--primary-light);
            border-bottom-color: var(--primary-light);
        }
        .container {
            width: 100%;
            max-width: var(--max-content);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            color: white;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .my-logo i {
            color: var(--accent);
        }
        .my-logo:hover {
            color: var(--accent-light);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .nav-menu {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        .nav-menu a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .nav-menu a:hover {
            color: var(--accent-light);
            border-bottom-color: var(--accent-light);
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: var(--bg-lighter);
            border-bottom: 1px solid var(--border);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin-left: 0.5rem;
            color: var(--text-light);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 3rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: var(--bg-lighter);
            padding: 2.5rem;
            border-radius: var(--radius);
            box-shadow: 0 5px 15px var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background-color: var(--bg-lighter);
            padding: 1.8rem;
            border-radius: var(--radius);
            box-shadow: 0 3px 10px var(--shadow);
        }
        .widget h3 {
            margin-top: 0;
            font-size: 1.4rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .widget h3 i {
            color: var(--accent);
        }
        .search-form {
            display: flex;
            margin-top: 1rem;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.85rem 1rem;
            border: 2px solid var(--border);
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-form input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .search-form button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        .search-form button:hover {
            background-color: var(--primary-dark);
        }
        .interactive-section {
            background: linear-gradient(to right bottom, #f0f9ff, #e6f3ff);
            padding: 2rem;
            border-radius: var(--radius);
            margin: 2.5rem 0;
            border-left: 6px solid var(--primary-light);
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
            margin-top: 1.5rem;
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: var(--border);
            cursor: pointer;
        }
        .rating-stars .star:hover,
        .rating-stars .star.active {
            color: var(--accent);
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-group label {
            font-weight: 600;
            color: var(--text-dark);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.9rem;
            border: 2px solid var(--border);
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--shadow-hover);
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            align-self: flex-start;
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: var(--radius);
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px var(--shadow-hover);
        }
        .highlight-box {
            background-color: #fff8e1;
            border-left: 5px solid var(--accent);
            padding: 1.8rem;
            margin: 2.5rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .inline-emoji {
            font-size: 1.2em;
            margin: 0 0.2em;
            vertical-align: middle;
        }
        img.featured-image {
            width: 100%;
            height: auto;
            border-radius: var(--radius);
            margin: 2.5rem 0;
            box-shadow: 0 10px 25px var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        img.featured-image:hover {
            transform: scale(1.008);
            box-shadow: 0 15px 35px var(--shadow-hover);
        }
        .content-link-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.2rem;
            margin: 2.5rem 0;
            padding: 1.5rem;
            background-color: var(--bg-light);
            border-radius: var(--radius);
        }
        .content-link-list a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 1rem;
            background-color: var(--bg-lighter);
            border-radius: calc(var(--radius) - 4px);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .content-link-list a:hover {
            background-color: white;
            border-color: var(--primary-light);
            transform: translateY(-5px);
        }
        .content-link-list i {
            color: var(--primary);
        }
        .site-footer {
            background-color: var(--primary-dark);
            color: #cbd5e0;
            padding: 3.5rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .footer-section ul {
            list-style: none;
        }
        .footer-section ul li {
            margin-bottom: 0.85rem;
        }
        .footer-section a {
            color: #cbd5e0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .footer-section a:hover {
            color: var(--accent-light);
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 1.2rem;
            border-radius: var(--radius);
            margin-top: 1rem;
            border-left: 4px solid var(--accent);
        }
        friend-link a {
            color: var(--accent-light);
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 2.5rem;
            margin-top: 2.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #a0aec0;
        }
        .update-time {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background-color: #e6fffa;
            color: #234e52;
            padding: 0.5rem 1rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            margin: 1.5rem 0;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: var(--primary-dark);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1.5rem;
                gap: 1rem;
                box-shadow: 0 10px 15px var(--shadow);
            }
            .nav-menu.active {
                display: flex;
            }
            .article-content {
                padding: 1.8rem;
            }
            .interactive-section {
                padding: 1.5rem;
            }
            .content-link-list {
                grid-template-columns: 1fr;
            }
        }
        @media print {
            .site-header, .sidebar, .interactive-section, .site-footer {
                display: none;
            }
            .main-content {
                grid-template-columns: 1fr;
            }
        }