* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #222;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { color: #1e3a8a; margin-bottom: 1rem; font-weight: 700; line-height: 1.3; }
        h1 { font-size: 2.8rem; text-align: center; margin-top: 1.5rem; border-bottom: 3px solid #fbbf24; padding-bottom: 1rem; }
        h2 { font-size: 2.2rem; margin-top: 2.5rem; border-left: 5px solid #dc2626; padding-left: 15px; }
        h3 { font-size: 1.8rem; margin-top: 2rem; color: #2563eb; }
        h4 { font-size: 1.4rem; margin-top: 1.5rem; color: #4f46e5; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        .lead { font-size: 1.25rem; font-weight: 500; color: #374151; }
        strong { color: #b91c1c; }
        em { font-style: italic; color: #7c3aed; }
        .highlight { background-color: #fef3c7; padding: 0.2rem 0.5rem; border-radius: 4px; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 30px 0;
        }
        @media (max-width: 992px) {
            .content-grid { grid-template-columns: 1fr; }
        }
        .site-header {
            background: linear-gradient(135deg, #1e3a8a 0%, #0c4a6e 100%);
            color: white;
            padding: 1rem 0;
            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;
        }
        .my-logo a {
            font-size: 2.2rem;
            font-weight: 900;
            color: #fbbf24;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 2px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { font-size: 2.5rem; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: all 0.3s ease;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: #fbbf24;
            color: #1e3a8a;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                background-color: #1e3a8a;
                padding: 2rem;
                transition: left 0.4s ease;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .main-nav.active { left: 0; }
            .main-nav ul {
                flex-direction: column;
                gap: 1rem;
            }
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e5e7eb;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: #6b7280;
        }
        .breadcrumb a {
            color: #4f46e5;
            text-decoration: none;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
            border-bottom: 1px dashed #d1d5db;
            margin-bottom: 2rem;
            font-size: 0.9rem;
            color: #6b7280;
        }
        .update-time i { color: #dc2626; margin-right: 5px; }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .widget {
            margin-bottom: 2.5rem;
        }
        .widget h3 {
            font-size: 1.3rem;
            border-bottom: 2px solid #fbbf24;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .widget ul {
            list-style: none;
        }
        .widget li {
            margin-bottom: 0.8rem;
            padding-left: 1.2rem;
            position: relative;
        }
        .widget li::before {
            content: "•";
            color: #2563eb;
            font-weight: bold;
            position: absolute;
            left: 0;
        }
        .widget a {
            color: #374151;
            text-decoration: none;
            transition: color 0.2s;
        }
        .widget a:hover {
            color: #dc2626;
        }
        .interactive-box {
            background: linear-gradient(to right, #fef3c7, #fde68a);
            border-left: 5px solid #f59e0b;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 8px;
        }
        .interactive-box h3 { margin-top: 0; border: none; }
        form { display: flex; flex-direction: column; gap: 1rem; }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #cbd5e1;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
        }
        button {
            padding: 0.8rem 1.5rem;
            background: linear-gradient(to right, #dc2626, #b91c1c);
            color: white;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(220, 38, 38, 0.4);
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #d1d5db;
            cursor: pointer;
            margin-bottom: 1rem;
        }
        .stars .active { color: #fbbf24; }
        .featured-image {
            margin: 2.5rem auto;
            text-align: center;
            border: 8px solid white;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            border-radius: 8px;
            overflow: hidden;
            max-width: 800px;
        }
        .featured-image figcaption {
            font-style: italic;
            color: #6b7280;
            padding: 0.8rem;
            background-color: #f9fafb;
        }
        .internal-links {
            background-color: #eff6ff;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .internal-links h3 { border: none; margin-top: 0; }
        .internal-links ul {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            list-style: none;
        }
        .internal-links li {
            background: white;
            padding: 0.8rem 1.5rem;
            border-radius: 50px;
            box-shadow: 0 3px 6px rgba(0,0,0,0.05);
            transition: all 0.3s;
        }
        .internal-links li:hover {
            transform: scale(1.05);
            box-shadow: 0 5px 12px rgba(0,0,0,0.1);
        }
        .internal-links a {
            text-decoration: none;
            color: #1d4ed8;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .internal-links i { color: #f59e0b; }
        .site-footer {
            background: #111827;
            color: #d1d5db;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid #374151;
        }
        .footer-section h4 {
            color: #fbbf24;
            margin-bottom: 1.5rem;
            border: none;
            font-size: 1.3rem;
        }
        .friend-links {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        friend-link a {
            color: #60a5fa;
            text-decoration: none;
        }
        friend-link a:hover { text-decoration: underline; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            font-size: 0.9rem;
            color: #9ca3af;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            article, .sidebar { padding: 1.5rem; }
            .header-container { flex-direction: column; align-items: flex-start; gap: 1rem; }
            .internal-links ul { flex-direction: column; }
            .footer-container { flex-direction: column; }
        }