*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #0f1b2d;
            --primary-light: #1a2d4a;
            --accent: #f5a623;
            --accent-dark: #d48c1a;
            --accent-glow: rgba(245, 166, 35, 0.3);
            --success: #27ae60;
            --text: #e8edf5;
            --text-muted: #a0b0c8;
            --bg-body: #0a121f;
            --bg-card: #12202f;
            --bg-card-hover: #182b40;
            --border: #1e3350;
            --radius: 14px;
            --radius-sm: 8px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg-body);
            color: var(--text);
            line-height: 1.7;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: #ffd166;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        ::selection {
            background: var(--accent);
            color: var(--primary);
        }
        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--primary);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--accent);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent-dark);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary) 0%, #0d1a2b 100%);
            border-bottom: 2px solid var(--accent);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent), #ffd166);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 30px var(--accent-glow);
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo i {
            background: var(--accent);
            -webkit-text-fill-color: var(--primary);
            font-size: 1.6rem;
            padding: 6px;
            border-radius: 8px;
        }
        .my-logo span {
            font-size: 0.7rem;
            -webkit-text-fill-color: var(--text-muted);
            display: block;
            font-weight: 400;
            letter-spacing: 1px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid var(--accent);
            color: var(--accent);
            font-size: 1.5rem;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--accent);
            color: var(--primary);
        }
        .navbar {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .navbar a {
            color: var(--text-muted);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .navbar a:hover,
        .navbar a.active {
            color: var(--accent);
            background: rgba(245, 166, 35, 0.08);
            border-color: var(--accent);
            text-decoration: none;
        }
        .navbar a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .breadcrumb-wrap {
            background: rgba(15, 27, 45, 0.7);
            padding: 8px 0;
            border-bottom: 1px solid var(--border);
            font-size: 0.85rem;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "›";
            color: var(--text-muted);
            margin-right: 6px;
            font-size: 1.1rem;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }
        .hero {
            padding: 50px 0 40px;
            text-align: center;
            background: radial-gradient(ellipse at 50% 0%, rgba(245, 166, 35, 0.06) 0%, transparent 70%);
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.2;
            background: linear-gradient(135deg, #fff, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
        }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 720px;
            margin: 0 auto 24px;
        }
        .hero .badge {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            padding: 6px 20px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.85rem;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .hero-meta {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 20px;
        }
        .hero-meta i {
            color: var(--accent);
            margin-right: 6px;
        }
        .search-section {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 30px;
            margin: 30px 0 40px;
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 200px;
            padding: 14px 20px;
            border: 2px solid var(--border);
            border-radius: 50px;
            background: var(--primary);
            color: var(--text);
            font-size: 1rem;
            transition: var(--transition);
            outline: none;
        }
        .search-form input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 20px var(--accent-glow);
        }
        .search-form input::placeholder {
            color: var(--text-muted);
        }
        .search-form button {
            padding: 14px 36px;
            border: none;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary);
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-form button:hover {
            transform: scale(1.03);
            box-shadow: 0 0 30px var(--accent-glow);
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            margin: 40px 0;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }
        .main-content h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            margin: 48px 0 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--accent);
            display: inline-block;
        }
        .main-content h2 i {
            margin-right: 10px;
        }
        .main-content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: #ffd166;
            margin: 32px 0 12px;
        }
        .main-content h3 i {
            margin-right: 8px;
            color: var(--accent);
        }
        .main-content h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text);
            margin: 24px 0 8px;
            padding-left: 12px;
            border-left: 4px solid var(--accent);
        }
        .main-content p {
            margin-bottom: 18px;
            color: var(--text-muted);
            font-size: 1.05rem;
        }
        .main-content strong {
            color: #fff;
            font-weight: 700;
        }
        .main-content ul,
        .main-content ol {
            margin: 12px 0 24px 24px;
            color: var(--text-muted);
        }
        .main-content li {
            margin-bottom: 8px;
        }
        .main-content .highlight-box {
            background: var(--bg-card);
            border-left: 6px solid var(--accent);
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .main-content .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .main-content .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .main-content .stat-card {
            background: var(--bg-card);
            padding: 20px;
            border-radius: var(--radius-sm);
            text-align: center;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .main-content .stat-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .main-content .stat-card .num {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--accent);
            display: block;
        }
        .main-content .stat-card .label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .main-content .feature-img {
            margin: 32px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .main-content .feature-img img {
            width: 100%;
            transition: var(--transition);
        }
        .main-content .feature-img img:hover {
            transform: scale(1.01);
        }
        .main-content .feature-img figcaption {
            background: var(--bg-card);
            padding: 12px 20px;
            font-size: 0.9rem;
            color: var(--text-muted);
            text-align: center;
            border-top: 1px solid var(--border);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .sidebar-card ul li a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }
        .sidebar-card ul li a i {
            color: var(--accent);
            font-size: 0.8rem;
        }
        .interaction-section {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px;
            margin: 40px 0;
            box-shadow: var(--shadow);
        }
        .interaction-section h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .rating-stars {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            margin: 12px 0 20px;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 2rem;
            color: var(--border);
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: var(--accent);
            text-shadow: 0 0 20px var(--accent-glow);
        }
        .comment-form textarea {
            width: 100%;
            padding: 16px 20px;
            border: 2px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: var(--text);
            font-size: 1rem;
            resize: vertical;
            min-height: 120px;
            transition: var(--transition);
            outline: none;
            font-family: var(--font);
        }
        .comment-form textarea:focus {
            border-color: var(--accent);
            box-shadow: 0 0 20px var(--accent-glow);
        }
        .comment-form .form-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin: 16px 0;
        }
        .comment-form .form-row input {
            flex: 1;
            min-width: 180px;
            padding: 12px 18px;
            border: 2px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: var(--text);
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .comment-form .form-row input:focus {
            border-color: var(--accent);
        }
        .comment-form .btn-submit {
            padding: 14px 40px;
            border: none;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary);
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .comment-form .btn-submit:hover {
            transform: scale(1.03);
            box-shadow: 0 0 30px var(--accent-glow);
        }
        .site-footer {
            background: var(--primary);
            border-top: 2px solid var(--border);
            padding: 40px 0 30px;
            margin-top: 60px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }
        @media (max-width: 768px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-col h4 {
            color: var(--accent);
            font-size: 1.1rem;
            margin-bottom: 16px;
            font-weight: 700;
        }
        .footer-col p,
        .footer-col a {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            padding: 4px 0;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        friend-link {
            display: block;
            padding: 16px 0;
            border-top: 1px solid var(--border);
            margin-top: 20px;
            font-size: 0.95rem;
            color: var(--text-muted);
        }
        friend-link a {
            color: var(--accent);
            margin: 0 8px;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .copyright strong {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .navbar {
                display: none;
                width: 100%;
                flex-direction: column;
                background: var(--primary-light);
                padding: 16px;
                border-radius: var(--radius-sm);
                margin-top: 8px;
                border: 1px solid var(--border);
            }
            .navbar.open {
                display: flex;
            }
            .navbar a {
                width: 100%;
                padding: 10px 16px;
                border-radius: var(--radius-sm);
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
            }
            .interaction-section {
                padding: 20px;
            }
            .main-content h2 {
                font-size: 1.6rem;
            }
            .main-content .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .main-content .stat-grid {
                grid-template-columns: 1fr;
            }
            .comment-form .form-row {
                flex-direction: column;
            }
            .breadcrumb-wrap {
                font-size: 0.75rem;
            }
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .skip-link {
            position: absolute;
            top: -100%;
            left: 20px;
            background: var(--accent);
            color: var(--primary);
            padding: 8px 20px;
            border-radius: 0 0 8px 8px;
            font-weight: 700;
            z-index: 9999;
            transition: var(--transition);
        }
        .skip-link:focus {
            top: 0;
        }
        .toc {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            margin: 24px 0 32px;
        }
        .toc summary {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--accent);
            cursor: pointer;
            padding: 4px 0;
        }
        .toc ol {
            margin: 12px 0 0 20px;
            color: var(--text-muted);
        }
        .toc ol li {
            padding: 4px 0;
        }
        .toc ol li a {
            color: var(--text-muted);
        }
        .toc ol li a:hover {
            color: var(--accent);
        }