* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f8f9fc;
            color: #1a1a2e;
            line-height: 1.7;
            font-size: 1.05rem;
        }
        a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #004080;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
            color: #fff;
            padding: 18px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #f7971e, #ffd200);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 30px rgba(255, 200, 0, 0.15);
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: initial;
            color: #ffd200;
            margin-right: 6px;
        }
        .my-logo span {
            font-size: 0.9rem;
            -webkit-text-fill-color: initial;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 400;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .main-nav {
            display: flex;
            gap: 6px;
            list-style: none;
            flex-wrap: wrap;
        }
        .main-nav li a {
            color: #eee;
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: all 0.25s ease;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .main-nav li a:hover {
            background: rgba(255, 200, 0, 0.18);
            color: #ffd200;
            border-color: rgba(255, 200, 0, 0.2);
            text-decoration: none;
        }
        .main-nav li a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .breadcrumb {
            background: #fff;
            padding: 12px 0;
            border-bottom: 1px solid #e8e8f0;
            font-size: 0.9rem;
            color: #555;
        }
        .breadcrumb a {
            color: #0066cc;
        }
        .breadcrumb a:hover {
            color: #004080;
        }
        .breadcrumb span {
            margin: 0 6px;
            color: #aaa;
        }
        .breadcrumb .current {
            color: #1a1a2e;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, #1a1a3e, #2d2b55, #1a1a3e);
            color: #fff;
            padding: 60px 0 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNjAiIGhlaWdodD0iNjAiIHZpZXdCb3g9IjAgMCA2MCA2MCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48cGF0aCBkPSJNMzAgMTBhMjAgMjAgMCAwIDEgMjAgMjAgMjAgMjAgMCAwIDEtNDAgMCAyMCAyMCAwIDAgMSAyMC0yMHoiIGZpbGw9InJnYmEoMjU1LDIwMCwwLDAuMDUpIi8+PC9zdmc+');
            background-size: 120px 120px;
            opacity: 0.3;
            pointer-events: none;
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 900;
            letter-spacing: -1px;
            background: linear-gradient(135deg, #f7971e, #ffd200);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        .hero p {
            font-size: 1.25rem;
            max-width: 750px;
            margin: 0 auto 24px;
            color: rgba(255, 255, 255, 0.85);
            position: relative;
            z-index: 1;
        }
        .hero .meta-badge {
            display: inline-flex;
            gap: 20px;
            background: rgba(255, 255, 255, 0.08);
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.9rem;
            color: #ccc;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
            z-index: 1;
        }
        .hero .meta-badge i {
            color: #ffd200;
            margin-right: 6px;
        }
        main {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .content-body {
            background: #fff;
            border-radius: 20px;
            padding: 40px 44px;
            box-shadow: 0 2px 30px rgba(0, 0, 0, 0.04);
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
            margin-bottom: 24px;
        }
        .sidebar-card h4 {
            font-size: 1.1rem;
            margin-bottom: 14px;
            border-bottom: 2px solid #f0f0f8;
            padding-bottom: 10px;
            color: #1a1a2e;
        }
        .sidebar-card ul {
            list-style: none;
        }
        .sidebar-card ul li {
            padding: 7px 0;
            border-bottom: 1px solid #f5f5fa;
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.92rem;
        }
        .sidebar-card ul li a i {
            color: #f7971e;
            font-size: 0.75rem;
        }
        h2 {
            font-size: 2rem;
            font-weight: 800;
            margin: 40px 0 18px;
            color: #0f0c29;
            letter-spacing: -0.3px;
            border-left: 5px solid #f7971e;
            padding-left: 18px;
        }
        h2:first-of-type {
            margin-top: 0;
        }
        h3 {
            font-size: 1.45rem;
            font-weight: 700;
            margin: 30px 0 14px;
            color: #1a1a3e;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin: 22px 0 10px;
            color: #2d2b55;
        }
        p {
            margin-bottom: 18px;
            color: #2d2d44;
        }
        .content-body ul,
        .content-body ol {
            margin: 0 0 20px 24px;
            color: #2d2d44;
        }
        .content-body li {
            margin-bottom: 8px;
        }
        .highlight {
            background: #fef9e7;
            padding: 2px 8px;
            border-radius: 6px;
            font-weight: 600;
        }
        .blockquote {
            background: #f0f0f8;
            border-left: 4px solid #f7971e;
            padding: 18px 24px;
            margin: 24px 0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #333;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .stat-card {
            background: linear-gradient(135deg, #f8f9fc, #eef0f7);
            padding: 20px 16px;
            border-radius: 14px;
            text-align: center;
            border: 1px solid #e8e8f0;
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: #f7971e;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #666;
            margin-top: 4px;
        }
        .featured-image {
            margin: 32px 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.08);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        .featured-image figcaption {
            background: #f5f5fa;
            padding: 12px 20px;
            font-size: 0.9rem;
            color: #666;
            text-align: center;
        }
        .search-section {
            background: #f0f0f8;
            border-radius: 16px;
            padding: 30px;
            margin: 36px 0;
        }
        .search-section h3 {
            margin-top: 0;
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 200px;
            padding: 14px 20px;
            border: 2px solid #ddd;
            border-radius: 50px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-form input:focus {
            border-color: #f7971e;
        }
        .search-form button {
            padding: 14px 32px;
            background: linear-gradient(135deg, #f7971e, #ffd200);
            border: none;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 700;
            color: #1a1a2e;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            transform: scale(1.02);
            box-shadow: 0 6px 24px rgba(247, 151, 30, 0.3);
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin: 40px 0 20px;
        }
        .comment-box,
        .rating-box {
            background: #f8f9fc;
            border-radius: 16px;
            padding: 28px;
            border: 1px solid #e8e8f0;
        }
        .comment-box h3,
        .rating-box h3 {
            margin-top: 0;
        }
        .comment-box textarea {
            width: 100%;
            padding: 14px;
            border: 2px solid #ddd;
            border-radius: 12px;
            font-size: 1rem;
            font-family: inherit;
            resize: vertical;
            min-height: 100px;
            outline: none;
            transition: border-color 0.3s;
        }
        .comment-box textarea:focus {
            border-color: #f7971e;
        }
        .comment-box input,
        .rating-box select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #ddd;
            border-radius: 12px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
            margin: 8px 0 14px;
        }
        .comment-box input:focus,
        .rating-box select:focus {
            border-color: #f7971e;
        }
        .btn-submit {
            padding: 12px 28px;
            background: linear-gradient(135deg, #302b63, #24243e);
            color: #fff;
            border: none;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-submit:hover {
            transform: scale(1.02);
            box-shadow: 0 6px 20px rgba(48, 43, 99, 0.25);
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #ffd200;
            margin: 8px 0 14px;
            cursor: pointer;
        }
        .rating-stars i {
            transition: transform 0.15s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        friend-link {
            display: block;
            background: #1a1a3e;
            color: #ddd;
            padding: 28px 0;
            margin-top: 20px;
            border-top: 4px solid #f7971e;
        }
        friend-link .container {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            justify-content: center;
        }
        friend-link a {
            color: #ffd200;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.04);
            transition: background 0.2s;
        }
        friend-link a:hover {
            background: rgba(255, 200, 0, 0.12);
            text-decoration: none;
            color: #fff;
        }
        footer {
            background: #0f0c29;
            color: #aaa;
            padding: 24px 0;
            text-align: center;
            font-size: 0.9rem;
        }
        footer .copyright {
            color: #777;
            letter-spacing: 0.3px;
        }
        footer .copyright i {
            color: #ff6b6b;
        }
        footer a {
            color: #ffd200;
        }
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .feedback-section {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: rgba(15, 12, 41, 0.98);
                padding: 18px 12px;
                border-radius: 16px;
                margin-top: 12px;
                gap: 4px;
                backdrop-filter: blur(8px);
                border: 1px solid rgba(255, 255, 255, 0.06);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav li a {
                padding: 12px 18px;
                border-radius: 12px;
            }
            .hamburger {
                display: block;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1.05rem;
            }
            .content-body {
                padding: 24px 18px;
            }
            h2 {
                font-size: 1.6rem;
                padding-left: 12px;
            }
            h3 {
                font-size: 1.25rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .feedback-section {
                grid-template-columns: 1fr;
            }
            .hero .meta-badge {
                flex-wrap: wrap;
                justify-content: center;
                gap: 10px;
                font-size: 0.8rem;
                padding: 8px 16px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo span {
                font-size: 0.7rem;
            }
            .content-body {
                padding: 18px 14px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-card .num {
                font-size: 1.6rem;
            }
        }
        .author-badge {
            display: flex;
            align-items: center;
            gap: 14px;
            background: #f5f5fa;
            padding: 16px 20px;
            border-radius: 14px;
            margin: 24px 0;
            border-left: 4px solid #302b63;
        }
        .author-badge .avatar {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #302b63, #f7971e);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1.4rem;
        }
        .author-badge .info {
            font-size: 0.95rem;
        }
        .author-badge .info strong {
            display: block;
            font-size: 1.05rem;
        }
        .author-badge .info span {
            color: #666;
        }
        .last-updated {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #eef0f7;
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #555;
            margin-bottom: 20px;
        }
        .last-updated i {
            color: #f7971e;
        }
        .toc {
            background: #f5f5fa;
            border-radius: 14px;
            padding: 20px 24px;
            margin: 20px 0 30px;
            border: 1px solid #e8e8f0;
        }
        .toc h4 {
            margin: 0 0 12px;
        }
        .toc ol {
            margin: 0;
            padding-left: 20px;
            columns: 2;
            column-gap: 30px;
        }
        .toc ol li {
            margin-bottom: 6px;
            font-size: 0.95rem;
        }
        @media (max-width: 600px) {
            .toc ol {
                columns: 1;
            }
        }