*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a365d;
            --secondary: #2b6cb0;
            --accent: #e53e3e;
            --gold: #d69e2e;
            --bg: #f7fafc;
            --card-bg: #ffffff;
            --text: #2d3748;
            --text-light: #4a5568;
            --border: #e2e8f0;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --radius: 16px;
            --spacing: 2rem;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            overflow-x: hidden;
        }
        .container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0f2540 0%, #1a365d 50%, #2b6cb0 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            letter-spacing: -0.5px;
        }
        .my-logo span {
            color: var(--gold);
            font-style: italic;
        }
        .my-logo i {
            font-size: 2rem;
            color: var(--gold);
        }
        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 50px;
            padding: 0.4rem 0.4rem 0.4rem 1rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(10px);
            min-width: 260px;
        }
        .search-box input {
            background: transparent;
            border: none;
            outline: none;
            color: white;
            font-size: 0.9rem;
            flex: 1;
            font-family: inherit;
        }
        .search-box input::placeholder {
            color: rgba(255, 255, 255, 0.7);
        }
        .search-box button {
            background: var(--gold);
            border: none;
            color: #1a365d;
            border-radius: 50px;
            padding: 0.5rem 1.2rem;
            cursor: pointer;
            font-weight: 700;
            font-size: 0.85rem;
            transition: all 0.3s ease;
        }
        .search-box button:hover {
            background: #fbbf24;
            transform: scale(1.05);
        }
        .hamburger {
            display: none;
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: white;
            font-size: 1.3rem;
            padding: 0.4rem 0.7rem;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .main-nav {
            display: flex;
            gap: 1.8rem;
            margin-top: 1rem;
            flex-wrap: wrap;
            justify-content: center;
        }
        .main-nav a {
            color: rgba(255, 255, 255, 0.9);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .main-nav a:hover {
            border-bottom-color: var(--gold);
            color: white;
        }
        .main-nav a i {
            font-size: 0.85rem;
            opacity: 0.7;
        }
        .nav-open {
            display: flex !important;
        }
        .breadcrumb-wrap {
            background: #edf2f7;
            padding: 0.8rem 0;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: var(--text-light);
            list-style: none;
            padding: 0;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .breadcrumb li+li::before {
            content: '›';
            color: #a0aec0;
            font-size: 1.2rem;
            line-height: 1;
        }
        .breadcrumb a {
            color: var(--secondary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .active {
            color: var(--text-light);
            font-weight: 500;
        }
        .layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        @media (max-width:992px) {
            .layout {
                grid-template-columns: 1fr;
            }
        }
        .main-content {
            min-width: 0;
        }
        .article-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 2.5rem;
            margin-bottom: 2rem;
            border: 1px solid var(--border);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            font-size: 0.85rem;
            color: var(--text-light);
            border-bottom: 1px solid var(--border);
            padding-bottom: 1.2rem;
            margin-bottom: 1.5rem;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .article-meta i {
            color: var(--secondary);
        }
        h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--primary);
            margin-bottom: 1rem;
            letter-spacing: -1px;
        }
        h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--primary);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--gold);
            display: inline-block;
        }
        h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--secondary);
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            margin: 1.5rem 0 0.6rem;
        }
        p {
            margin-bottom: 1.2rem;
            color: var(--text);
        }
        .highlight-box {
            background: linear-gradient(135deg, #ebf4ff, #f0f9ff);
            border-left: 4px solid var(--secondary);
            padding: 1.2rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
            font-size: 0.95rem;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.2rem;
            margin: 1.5rem 0;
        }
        .stat-box {
            background: #f0f4f8;
            border-radius: 12px;
            padding: 1.2rem;
            text-align: center;
            border: 1px solid var(--border);
        }
        .stat-box .number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
        }
        .stat-box .label {
            font-size: 0.85rem;
            color: var(--text-light);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .feature-image {
            width: 100%;
            border-radius: 12px;
            margin: 1.8rem 0;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        figure {
            margin: 2rem 0;
        }
        figure img {
            width: 100%;
            border-radius: 12px;
            display: block;
        }
        figcaption {
            font-size: 0.85rem;
            color: var(--text-light);
            text-align: center;
            margin-top: 0.6rem;
            font-style: italic;
        }
        .table-responsive {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.92rem;
            background: white;
            border-radius: 8px;
            overflow: hidden;
        }
        table th {
            background: var(--primary);
            color: white;
            padding: 0.8rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid var(--border);
        }
        table tr:nth-child(even) {
            background: #f8fafc;
        }
        .pro-tip {
            background: #fffbeb;
            border: 1px solid #fcd34d;
            border-radius: 12px;
            padding: 1.5rem;
            margin: 1.8rem 0;
            position: relative;
        }
        .pro-tip::before {
            content: '💡 Pro Tip';
            font-weight: 800;
            color: #b45309;
            display: block;
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
        }
        blockquote {
            background: #ebf4ff;
            border-left: 4px solid var(--secondary);
            padding: 1.2rem 1.5rem;
            border-radius: 0 8px 8px 0;
            font-style: italic;
            margin: 1.5rem 0;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .author-box {
            background: linear-gradient(135deg, #1a365d, #2b6cb0);
            color: white;
            border-radius: 12px;
            padding: 1.5rem;
            margin: 2rem 0;
            display: flex;
            gap: 1.2rem;
            align-items: center;
        }
        .author-box img {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            object-fit: cover;
            border: 3px solid var(--gold);
        }
        .author-box p {
            color: rgba(255, 255, 255, 0.9);
            font-size: 0.95rem;
        }
        .author-box strong {
            color: white;
        }
        .related-links {
            background: #f8fafc;
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 1.8rem;
            margin: 2rem 0;
        }
        .related-links h4 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
        }
        .related-links ul {
            list-style: none;
            padding: 0;
            margin: 1rem 0 0;
        }
        .related-links li {
            padding: 0.5rem 0;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 0.95rem;
        }
        .related-links li:last-child {
            border-bottom: none;
        }
        .related-links a {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 500;
        }
        .related-links a:hover {
            text-decoration: underline;
            color: var(--accent);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 1.8rem;
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-top: 0;
            border-bottom: 2px solid var(--gold);
            padding-bottom: 0.6rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-links li {
            margin-bottom: 0.4rem;
        }
        .sidebar-links a {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: var(--text-light);
            text-decoration: none;
            font-size: 0.88rem;
            padding: 0.5rem 0.6rem;
            border-radius: 8px;
            transition: all 0.2s;
        }
        .sidebar-links a:hover {
            background: #edf2f7;
            color: var(--secondary);
            transform: translateX(3px);
        }
        .sidebar-links a i {
            color: var(--gold);
            font-size: 0.8rem;
        }
        .rating-box {
            text-align: center;
            padding: 1rem 0;
        }
        .rating-stars {
            font-size: 1.6rem;
            color: var(--gold);
            letter-spacing: 4px;
            display: flex;
            justify-content: center;
            gap: 0.2rem;
            margin: 0.8rem 0;
            cursor: pointer;
            transition: all 0.2s;
        }
        .rating-stars i {
            transition: transform 0.2s, color 0.2s;
        }
        .rating-stars i:hover {
            transform: scale(1.3);
            color: #fbbf24;
        }
        .rating-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
        }
        .comment-form {
            background: #f8fafc;
            border-radius: 12px;
            padding: 2rem;
            margin: 2rem 0;
            border: 1px solid var(--border);
        }
        .comment-form h3 {
            margin-top: 0;
            color: var(--primary);
            font-size: 1.3rem;
        }
        .comment-form label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            font-size: 0.88rem;
            color: var(--text);
        }
        .comment-form input,
        .comment-form textarea {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-family: inherit;
            font-size: 0.92rem;
            margin-bottom: 1rem;
            transition: border-color 0.3s;
        }
        .comment-form input:focus,
        .comment-form textarea:focus {
            outline: none;
            border-color: var(--secondary);
        }
        .comment-form textarea {
            resize: vertical;
            min-height: 130px;
        }
        .btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.92rem;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover {
            background: var(--secondary);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }
        .btn i {
            font-size: 0.9rem;
        }
        .btn-gold {
            background: var(--gold);
        }
        .btn-gold:hover {
            background: #fbbf24;
        }
        .site-footer {
            background: #0f2540;
            color: rgba(255, 255, 255, 0.8);
            padding: 3rem 0 2rem;
            margin-top: 3rem;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-col h4 {
            color: white;
            font-size: 1rem;
            margin-bottom: 1rem;
            border-bottom: 2px solid var(--gold);
            display: inline-block;
            padding-bottom: 0.3rem;
        }
        .footer-col a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            font-size: 0.85rem;
            display: block;
            margin-bottom: 0.5rem;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: var(--gold);
        }
        .friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            padding: 1.5rem;
            margin-top: 1.5rem;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .friend-link a {
            color: var(--gold);
            text-decoration: none;
            font-size: 0.9rem;
            display: inline-block;
            margin: 0.3rem 1rem 0.3rem 0;
            transition: all 0.2s;
        }
        .friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .copyright a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
        }
        @media (max-width:768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
                order: 3;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0.6rem;
                padding: 1rem 0;
                text-align: center;
            }
            .main-nav a {
                padding: 0.6rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .search-box {
                min-width: 100%;
                margin-top: 0.8rem;
            }
            .article-card {
                padding: 1.5rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            .author-box {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width:480px) {
            .layout {
                padding: 1.5rem 0;
            }
            .article-card {
                padding: 1rem;
                border-radius: 10px;
            }
            h1 {
                font-size: 1.5rem;
            }
        }
        .schema-org {
            display: none;
        }
        .external-link::after {
            content: '↗';
            margin-left: 4px;
            font-size: 0.75rem;
        }
        .anchor-link {
            position: relative;
        }
        .anchor-link::before {
            content: '#';
            position: absolute;
            left: -1.2rem;
            color: var(--gold);
            font-size: 1rem;
            opacity: 0;
            transition: opacity 0.2s;
        }
        .anchor-link:hover::before {
            opacity: 1;
        }