:root {
            --primary: #1a365d; 
            --secondary: #c53030; 
            --accent: #ecc94b; 
            --light: #f7fafc;
            --dark: #2d3748;
            --gray: #a0aec0;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --transition: all 0.3s ease;
            --border-radius: 8px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: var(--light);
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        ul { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(135deg, var(--primary) 0%, #2a4365 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: Georgia, serif;
            font-size: 2.2rem;
            font-weight: bold;
            color: var(--accent);
            text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { font-size: 2rem; }
        .my-logo:hover { color: white; transform: scale(1.03); }
        .breadcrumb {
            background-color: #edf2f7;
            padding: 0.8rem 1.5rem;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--gray);
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            max-width: 1280px;
            margin: 0 auto;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin: 0 10px;
            color: var(--gray);
        }
        .breadcrumb a:hover { color: var(--secondary); }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            gap: 2rem;
        }
        .nav-list a {
            font-weight: 500;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .nav-list a:hover,
        .nav-list a:focus {
            border-bottom-color: var(--accent);
            color: var(--accent);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .main-container {
            max-width: 1280px;
            margin: 2rem auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .main-container { grid-template-columns: 1fr; }
        }
        article {
            background: white;
            border-radius: var(--border-radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        aside {
            background: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 5px solid var(--secondary);
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--secondary);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--dark);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.25rem;
            font-weight: 500;
            color: var(--primary);
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fffacd;
            padding: 1.5rem;
            border-left: 4px solid var(--accent);
            margin: 1.5rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .inline-link {
            color: var(--secondary);
            font-weight: 600;
            border-bottom: 1px dotted var(--secondary);
        }
        .inline-link:hover {
            color: var(--primary);
            border-bottom-style: solid;
        }
        .stats-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .stat {
            text-align: center;
            padding: 1.5rem;
            background: #f8f9fa;
            border-radius: var(--border-radius);
            border-top: 4px solid var(--primary);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--secondary);
            display: block;
        }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .interactive-module {
            background: #f0f9ff;
            padding: 2rem;
            border-radius: var(--border-radius);
            margin: 2.5rem 0;
        }
        .module-title {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 1.5rem;
            color: var(--primary);
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #cbd5e0;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, var(--secondary), #dd6b20);
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 50px;
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        button:hover, .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(197, 48, 48, 0.3);
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
            direction: rtl; 
        }
        .star {
            font-size: 2rem;
            color: #e2e8f0;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star:hover ~ .star,
        .star.selected,
        .star.selected ~ .star {
            color: #f6ad55;
        }
        .featured-image {
            margin: 2.5rem 0;
            text-align: center;
        }
        .featured-image img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 0 auto;
        }
        .image-caption {
            font-style: italic;
            color: var(--gray);
            margin-top: 0.8rem;
            font-size: 0.9rem;
        }
        .update-time {
            text-align: right;
            font-size: 0.9rem;
            color: var(--gray);
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px dashed #cbd5e0;
        }
        site-footer {
            background: var(--primary);
            color: white;
            padding: 3rem 1.5rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            color: var(--accent);
            margin-bottom: 1rem;
        }
        .footer-heading {
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            color: var(--accent);
            position: relative;
            padding-bottom: 0.5rem;
        }
        .footer-heading::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--secondary);
        }
        .footer-links a {
            display: block;
            margin-bottom: 0.8rem;
            color: #cbd5e0;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 1rem;
            border-radius: var(--border-radius);
            margin-bottom: 1rem;
            border-left: 3px solid var(--secondary);
        }
        friend-link a {
            color: white;
        }
        friend-link a:hover {
            color: var(--accent);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav { width: 100%; order: 3; }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--primary);
                padding: 1rem 0;
                margin-top: 1rem;
                border-radius: var(--border-radius);
            }
            .nav-list.active { display: flex; }
            .header-container { flex-direction: column; align-items: flex-start; }
            .my-logo { margin-bottom: 1rem; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            article, aside { padding: 1.5rem; }
            .interactive-module { padding: 1.5rem; }
        }
        @media print {
            .site-header, .breadcrumb, aside, .interactive-module, site-footer { display: none; }
            body { background: white; color: black; }
            article { box-shadow: none; padding: 0; }
            a { color: black; text-decoration: underline; }
        }