*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a2a3a;
            --primary-light: #2c4056;
            --accent: #e8b84b;
            --accent-hover: #f0c865;
            --bg: #f5f2ea;
            --card-bg: #ffffff;
            --text: #1e1e24;
            --text-light: #4a4a52;
            --border: #d9d2c5;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --radius: 12px;
            --max-width: 1200px;
            --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --transition: 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-body);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--primary);
            color: #fff;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 20px;
            max-width: var(--max-width);
            margin: 0 auto;
            flex-wrap: wrap;
            gap: 10px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: 1px;
            transition: opacity var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            font-size: 1.6rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            color: var(--accent-hover);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #f0eee6;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: border-color var(--transition), color var(--transition);
        }
        .nav-menu a:hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }
        .nav-menu .active a {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }
        .breadcrumb {
            background: #e8e3da;
            padding: 10px 20px;
            font-size: 0.85rem;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: var(--text-light);
            font-weight: 600;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .current {
            color: var(--text-light);
            font-weight: 500;
        }
        main {
            padding: 40px 0 60px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .content-area {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 12px;
            color: var(--primary);
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-top: 48px;
            margin-bottom: 16px;
            color: var(--primary);
            border-left: 5px solid var(--accent);
            padding-left: 16px;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 10px;
            color: var(--primary-light);
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-top: 20px;
            margin-bottom: 8px;
            color: var(--text);
        }
        p,
        li {
            color: var(--text-light);
            margin-bottom: 12px;
        }
        p strong {
            color: var(--text);
            font-weight: 600;
        }
        .card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px 30px;
            box-shadow: var(--shadow);
            margin-bottom: 30px;
            border: 1px solid var(--border);
        }
        .card-feature {
            border-left: 4px solid var(--accent);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin: 20px 0;
        }
        .feature-item {
            background: #faf8f4;
            padding: 20px 18px;
            border-radius: var(--radius);
            text-align: center;
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }
        .feature-item i {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .feature-item h4 {
            margin-top: 0;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 30px;
            font-size: 0.9rem;
            color: var(--text-light);
            margin: 16px 0 24px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border);
        }
        .meta-info i {
            margin-right: 6px;
            color: var(--accent);
        }
        .update-badge {
            background: var(--accent);
            color: var(--primary);
            padding: 2px 14px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.8rem;
        }
        .featured-image {
            margin: 28px 0;
            border-radius: var(--radius);
            overflow: hidden;
            background: #e8e3da;
            position: relative;
        }
        .featured-image img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 12px 20px;
            font-size: 0.85rem;
            color: var(--text-light);
            background: #faf8f4;
            border-top: 1px solid var(--border);
            font-style: italic;
        }
        .related-links {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            padding: 14px 0;
            margin: 18px 0;
        }
        .related-links a {
            background: #f0ede6;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .related-links a:hover {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
        }
        blockquote {
            border-left: 4px solid var(--accent);
            background: #faf8f4;
            padding: 18px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
            font-style: italic;
            color: var(--text-light);
        }
        blockquote strong {
            color: var(--text);
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: var(--card-bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        th,
        td {
            padding: 12px 18px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }
        th {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f8f6f0;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text);
            font-size: 0.95rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            background: #fcfbf9;
            transition: border-color var(--transition), box-shadow var(--transition);
            font-family: var(--font-body);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(232, 184, 75, 0.2);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition);
            background: var(--accent);
            color: var(--primary);
        }
        .btn:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(232, 184, 75, 0.3);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--accent);
            color: var(--accent);
        }
        .btn-outline:hover {
            background: var(--accent);
            color: var(--primary);
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-form input {
            flex: 1;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            font-size: 1.6rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #d9d2c5;
            transition: color var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: var(--accent);
        }
        .comment-list {
            margin-top: 20px;
        }
        .comment-item {
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
        }
        .comment-item:last-child {
            border-bottom: none;
        }
        .comment-meta {
            font-size: 0.85rem;
            color: var(--text-light);
            display: flex;
            gap: 16px;
            margin-bottom: 4px;
        }
        .comment-meta strong {
            color: var(--text);
        }
        .sidebar .card {
            padding: 20px 22px;
        }
        .sidebar h3 {
            margin-top: 0;
            font-size: 1.2rem;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 8px;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar li {
            padding: 6px 0;
            border-bottom: 1px dashed var(--border);
        }
        .sidebar li:last-child {
            border-bottom: none;
        }
        .sidebar a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar a i {
            color: var(--accent);
            font-size: 0.8rem;
        }
        friend-link {
            display: block;
            padding: 28px 20px;
            background: var(--primary);
            color: #f0eee6;
            text-align: center;
        }
        friend-link .container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px 30px;
        }
        friend-link a {
            color: var(--accent);
            font-weight: 500;
            transition: opacity var(--transition);
        }
        friend-link a:hover {
            opacity: 0.8;
            color: var(--accent-hover);
        }
        .site-footer {
            background: #0f1a26;
            color: #b0b8c0;
            padding: 30px 20px;
            text-align: center;
            font-size: 0.9rem;
        }
        .site-footer .copyright {
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .site-footer a {
            color: var(--accent);
        }
        @media (max-width: 1024px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                padding: 16px 0 8px;
                gap: 12px;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                font-size: 1rem;
                padding: 8px 0;
            }
            .header-inner {
                padding: 10px 16px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.3rem;
                padding-left: 12px;
            }
            .card {
                padding: 18px 16px;
            }
            .feature-grid {
                grid-template-columns: 1fr 1fr;
            }
            .meta-info {
                flex-direction: column;
                gap: 8px;
            }
            .search-form {
                flex-direction: column;
            }
            .star-rating {
                font-size: 1.4rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 8px 16px;
            }
            .breadcrumb ol {
                gap: 4px 8px;
            }
        }
        @media (max-width: 480px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 14px;
            }
            h1 {
                font-size: 1.5rem;
            }
            .card {
                padding: 14px 12px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .related-links {
                gap: 6px 10px;
            }
            .related-links a {
                font-size: 0.78rem;
                padding: 3px 12px;
            }
        }