:root {
            --primary: #1e40af;
            --secondary: #dc2626;
            --accent: #fbbf24;
            --light: #f8fafc;
            --dark: #0f172a;
            --gray: #64748b;
            --transition: all 0.3s ease;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --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: 1.6;
            color: var(--dark);
            background-color: var(--light);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary), var(--dark));
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent);
        }
        .my-logo:hover {
            color: var(--accent);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        nav a:hover,
        nav a.active {
            background-color: rgba(255, 255, 255, 0.2);
            color: var(--accent);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e2e8f0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin: 0 10px;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 2rem 0;
        }
        article {
            background: white;
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 1rem;
            line-height: 1.2;
            border-left: 5px solid var(--secondary);
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--dark);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--primary);
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--secondary);
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--gray);
            font-weight: 500;
            margin-bottom: 2rem;
        }
        strong {
            color: var(--primary);
        }
        em {
            color: var(--secondary);
            font-style: italic;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }
        .content-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--radius);
            margin: 2rem auto;
            display: block;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }
        .figure-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: -1.5rem;
            margin-bottom: 2rem;
        }
        .info-box {
            background: #dbeafe;
            border-left: 4px solid var(--primary);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .info-box h3 {
            margin-top: 0;
        }
        .link-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .link-card {
            background: var(--light);
            border: 1px solid #cbd5e1;
            border-radius: var(--radius);
            padding: 1rem;
            transition: var(--transition);
        }
        .link-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }
        .link-card a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            display: block;
            margin-bottom: 0.5rem;
        }
        .link-card a:hover {
            text-decoration: underline;
        }
        .link-card p {
            font-size: 0.9rem;
            color: var(--gray);
            margin: 0;
        }
        .interactive-section {
            background: #f1f5f9;
            border-radius: var(--radius);
            padding: 2rem;
            margin: 3rem 0;
        }
        .interactive-section h2 {
            border-bottom: none;
            text-align: center;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #cbd5e1;
            border-radius: var(--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(30, 64, 175, 0.2);
        }
        button, .btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
            text-decoration: none;
            text-align: center;
        }
        button:hover, .btn:hover {
            background: var(--secondary);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #d1d5db;
            cursor: pointer;
            margin: 0;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: var(--accent);
        }
        .comments-section {
            margin-top: 3rem;
        }
        .comment {
            background: white;
            border-radius: var(--radius);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 1rem;
            font-size: 0.9rem;
            color: var(--gray);
        }
        .comment-rating {
            color: var(--accent);
        }
        footer {
            background: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: var(--accent);
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.1);
            padding: 1rem;
            border-radius: var(--radius);
            margin: 1rem 0;
        }
        friend-link a {
            color: var(--accent);
            font-weight: 600;
            text-decoration: none;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        .update-time {
            background: var(--accent);
            color: var(--dark);
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 2rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .link-list { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .header-top { flex-wrap: wrap; }
            nav { width: 100%; order: 3; margin-top: 1rem; }
            nav ul {
                flex-direction: column;
                gap: 0;
                display: none;
            }
            nav ul.active {
                display: flex;
            }
            nav li {
                width: 100%;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            nav a {
                display: block;
                padding: 1rem;
            }
            .hamburger {
                display: block;
            }
            article {
                padding: 1.5rem;
            }
            .interactive-section {
                padding: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            h1 { font-size: 1.8rem; }
            .my-logo { font-size: 1.5rem; }
        }
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mb-1 { margin-bottom: 1rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }