*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a2a3a;
            --secondary: #e63946;
            --accent: #f1c40f;
            --bg: #f8f9fa;
            --text: #2c3e50;
            --light: #ffffff;
            --gray: #6c757d;
            --border: #dee2e6;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --transition: 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding: 0;
            min-height: 100vh;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: #b71c1c;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: var(--primary);
            color: var(--light);
            padding: 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            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: 1200px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: -0.5px;
            text-transform: uppercase;
            background: linear-gradient(135deg, #f1c40f, #e67e22);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: transform var(--transition);
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.7rem;
            display: block;
            -webkit-text-fill-color: rgba(255, 255, 255, 0.7);
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 1px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--light);
            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#main-nav ul {
            display: flex;
            list-style: none;
            gap: 6px;
            flex-wrap: wrap;
            align-items: center;
        }
        nav#main-nav ul li a {
            color: rgba(255, 255, 255, 0.85);
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: all var(--transition);
            display: block;
        }
        nav#main-nav ul li a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
            text-decoration: none;
        }
        nav#main-nav ul li a i {
            margin-right: 6px;
        }
        .breadcrumb {
            background: var(--light);
            padding: 10px 20px;
            border-bottom: 1px solid var(--border);
            font-size: 0.88rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 10px;
            align-items: center;
        }
        .breadcrumb ol li {
            color: var(--gray);
        }
        .breadcrumb ol li+li::before {
            content: "›";
            margin-right: 10px;
            color: var(--gray);
            font-weight: 700;
        }
        .breadcrumb ol li a {
            color: var(--secondary);
        }
        .breadcrumb ol li a:hover {
            text-decoration: underline;
        }
        .breadcrumb ol li:last-child {
            color: var(--text);
            font-weight: 600;
        }
        main {
            padding: 30px 20px 50px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media(max-width:992px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }
        .article-body {
            background: var(--light);
            border-radius: var(--radius);
            padding: 30px 35px;
            box-shadow: var(--shadow);
        }
        @media(max-width:600px) {
            .article-body {
                padding: 18px 16px;
            }
        }
        .article-body h1 {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 10px;
            line-height: 1.2;
            border-left: 5px solid var(--secondary);
            padding-left: 18px;
        }
        .article-body h1 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .article-body .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 30px;
            color: var(--gray);
            font-size: 0.92rem;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 1px solid var(--border);
        }
        .article-body .meta span i {
            margin-right: 6px;
            color: var(--secondary);
        }
        .article-body h2 {
            font-size: 1.7rem;
            color: var(--primary);
            margin: 40px 0 16px;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 8px;
        }
        .article-body h2 i {
            color: var(--secondary);
            margin-right: 10px;
        }
        .article-body h3 {
            font-size: 1.3rem;
            color: var(--primary);
            margin: 30px 0 12px;
            padding-left: 14px;
            border-left: 4px solid var(--secondary);
        }
        .article-body h4 {
            font-size: 1.1rem;
            color: var(--text);
            margin: 22px 0 8px;
            font-weight: 600;
        }
        .article-body p {
            margin-bottom: 18px;
            font-size: 1.02rem;
            color: #3d3d3d;
        }
        .article-body p strong {
            color: var(--primary);
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 20px 30px;
        }
        .article-body ul li,
        .article-body ol li {
            margin-bottom: 8px;
        }
        .article-body .highlight-box {
            background: #fff8e1;
            border-left: 5px solid var(--accent);
            padding: 18px 22px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 25px 0;
        }
        .article-body .highlight-box i {
            color: var(--accent);
            margin-right: 8px;
        }
        .article-body .tip-box {
            background: #e8f5e9;
            border-left: 5px solid #2e7d32;
            padding: 18px 22px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 25px 0;
        }
        .article-body .tip-box i {
            color: #2e7d32;
            margin-right: 8px;
        }
        .article-body .code-block {
            background: #1e2a3a;
            color: #e8e8e8;
            padding: 18px 22px;
            border-radius: var(--radius);
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
            overflow-x: auto;
            margin: 20px 0;
            line-height: 1.5;
            white-space: pre-wrap;
            word-break: break-word;
        }
        .article-body .code-block .comment {
            color: #6a9955;
        }
        .article-body .code-block .keyword {
            color: #569cd6;
        }
        .article-body .code-block .string {
            color: #ce9178;
        }
        .article-body .feature-img {
            margin: 30px 0;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .article-body .feature-img figcaption {
            text-align: center;
            font-size: 0.88rem;
            color: var(--gray);
            margin-top: 10px;
            font-style: italic;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            font-size: 0.95rem;
        }
        .article-body table th {
            background: var(--primary);
            color: var(--light);
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        .article-body table td {
            padding: 10px 16px;
            border-bottom: 1px solid var(--border);
        }
        .article-body table tr:hover {
            background: #f1f3f5;
        }
        .article-body .link-list {
            background: #f0f4f8;
            border-radius: var(--radius);
            padding: 20px 24px;
            margin: 25px 0;
        }
        .article-body .link-list li {
            margin-bottom: 6px;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar .card {
            background: var(--light);
            border-radius: var(--radius);
            padding: 22px 20px;
            box-shadow: var(--shadow);
        }
        .sidebar .card h3 {
            font-size: 1.15rem;
            color: var(--primary);
            margin-bottom: 14px;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 8px;
        }
        .sidebar .card h3 i {
            margin-right: 8px;
            color: var(--secondary);
        }
        .sidebar .card ul {
            list-style: none;
        }
        .sidebar .card ul li {
            padding: 6px 0;
            border-bottom: 1px solid #f0f0f0;
        }
        .sidebar .card ul li a {
            font-size: 0.95rem;
        }
        .sidebar .card ul li a i {
            margin-right: 8px;
            color: var(--accent);
            font-size: 0.8rem;
        }
        .search-box {
            display: flex;
            gap: 10px;
            margin: 20px 0 10px;
        }
        .search-box input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            transition: border var(--transition);
            outline: none;
        }
        .search-box input:focus {
            border-color: var(--secondary);
        }
        .search-box button {
            padding: 12px 24px;
            background: var(--secondary);
            color: var(--light);
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition);
        }
        .search-box button:hover {
            background: #b71c1c;
        }
        .feedback-section {
            margin-top: 40px;
            padding-top: 30px;
            border-top: 2px solid var(--border);
        }
        .feedback-section h2 {
            border-bottom: none;
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 5px;
            color: var(--primary);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            font-family: inherit;
            transition: border var(--transition);
            outline: none;
            background: var(--light);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--secondary);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }
        @media(max-width:600px) {
            .form-row {
                grid-template-columns: 1fr;
            }
        }
        .btn {
            padding: 12px 30px;
            background: var(--secondary);
            color: var(--light);
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: #b71c1c;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(230, 57, 70, 0.3);
        }
        .btn i {
            font-size: 1.1rem;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            direction: rtl;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            transition: color 0.2s;
            cursor: pointer;
            color: #ddd;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: #f1c40f;
        }
        friend-link {
            display: block;
            background: var(--primary);
            color: var(--light);
            padding: 30px 20px;
            margin-top: 40px;
            border-radius: var(--radius);
        }
        friend-link h3 {
            font-size: 1.3rem;
            margin-bottom: 16px;
            color: var(--accent);
            text-align: center;
        }
        friend-link ul {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px 24px;
            list-style: none;
            max-width: 1200px;
            margin: 0 auto;
        }
        friend-link ul li a {
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.95rem;
            transition: color var(--transition);
        }
        friend-link ul li a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        footer {
            background: #0f1a24;
            color: rgba(255, 255, 255, 0.7);
            padding: 30px 20px 20px;
            text-align: center;
            margin-top: 30px;
        }
        footer p {
            font-size: 0.9rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        footer .copyright {
            margin-top: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        @media(max-width:768px) {
            .nav-toggle {
                display: block;
            }
            nav#main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease;
            }
            nav#main-nav.open {
                max-height: 600px;
            }
            nav#main-nav ul {
                flex-direction: column;
                gap: 2px;
                padding: 10px 0 6px;
                width: 100%;
            }
            nav#main-nav ul li {
                width: 100%;
            }
            nav#main-nav ul li a {
                padding: 10px 16px;
                border-radius: 6px;
            }
            .article-body h1 {
                font-size: 1.6rem;
                padding-left: 12px;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }
            .article-body h3 {
                font-size: 1.1rem;
            }
            .article-body {
                padding: 16px;
            }
            .header-inner {
                padding: 10px 16px;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .breadcrumb {
                padding: 8px 16px;
                font-size: 0.8rem;
            }
            main {
                padding: 20px 12px 40px;
            }
            .content-grid {
                gap: 24px;
            }
            .rating-stars {
                font-size: 1.6rem;
            }
        }
        @media(max-width:480px) {
            .article-body h1 {
                font-size: 1.35rem;
            }
            .article-body h2 {
                font-size: 1.15rem;
            }
            .article-body p {
                font-size: 0.95rem;
            }
            .search-box {
                flex-direction: column;
            }
            .search-box button {
                width: 100%;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
            .sidebar .card {
                padding: 16px;
            }
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f1f1;
        }
        ::-webkit-scrollbar-thumb {
            background: var(--gray);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary);
        }
        .anchor-offset {
            scroll-margin-top: 80px;
        }