:root {
            --bg-primary: #0b0b14;
            --bg-secondary: #141422;
            --bg-card: #1b1b2e;
            --accent-orange: #ff5e3a;
            --accent-purple: #7b5eff;
            --text-primary: #e8e8f0;
            --text-secondary: #a0a0b5;
            --text-muted: #6a6a80;
            --border: #2a2a40;
            --success: #4ade80;
            --warning: #fbbf24;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            overflow-x: hidden;
        }
        a {
            color: var(--accent-purple);
            text-decoration: none;
            transition: all .3s ease;
        }
        a:hover {
            color: var(--accent-orange);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
        }
        .header {
            background: rgba(11, 11, 20, .95);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 0 24px;
        }
        .header-inner {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 80px;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -1px;
            text-decoration: none;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: .85;
        }
        .logo-sub {
            display: block;
            font-size: .7rem;
            font-weight: 400;
            letter-spacing: 3px;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-top: -4px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-list li a {
            display: block;
            padding: 10px 18px;
            border-radius: 50px;
            font-size: .9rem;
            font-weight: 500;
            color: var(--text-primary);
            border: 1px solid transparent;
        }
        .nav-list li a:hover {
            background: rgba(123, 94, 255, .15);
            border-color: rgba(123, 94, 255, .5);
            color: var(--accent-purple);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 8px;
            z-index: 1100;
        }
        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: 80px;
                left: 0;
                right: 0;
                background: var(--bg-secondary);
                flex-direction: column;
                padding: 20px 24px;
                gap: 10px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 40px rgba(0, 0, 0, .5);
            }
            .nav-list.open {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-inner {
                height: 70px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
        }
        .breadcrumb-wrap {
            background: var(--bg-secondary);
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
            font-size: .85rem;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--accent-purple);
        }
        .breadcrumb .sep {
            margin: 0 8px;
            color: var(--text-muted);
        }
        .breadcrumb .current {
            color: var(--text-primary);
            font-weight: 500;
        }
        .main-layout {
            max-width: 1400px;
            margin: 0 auto;
            padding: 40px 24px;
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
        }
        .article {
            background: var(--bg-secondary);
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border);
            box-shadow: 0 4px 30px rgba(0, 0, 0, .4);
        }
        .article h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-primary), var(--accent-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .article h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 48px 0 20px;
            padding-top: 40px;
            border-top: 1px solid var(--border);
            position: relative;
        }
        .article h2:first-of-type {
            border-top: none;
            padding-top: 0;
        }
        .article h2::before {
            content: '◆';
            color: var(--accent-orange);
            margin-right: 10px;
            font-size: 1.2rem;
        }
        .article h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 36px 0 14px;
        }
        .article h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--accent-purple);
            margin: 28px 0 12px;
        }
        .article p {
            color: var(--text-secondary);
            margin-bottom: 18px;
            font-size: 1.02rem;
        }
        .article p.lead {
            font-size: 1.15rem;
            color: var(--text-primary);
            line-height: 1.8;
            border-left: 4px solid var(--accent-orange);
            padding-left: 20px;
            font-style: italic;
        }
        .article ul,
        .article ol {
            margin: 0 0 22px;
            padding-left: 28px;
            color: var(--text-secondary);
        }
        .article li {
            margin-bottom: 10px;
        }
        .article strong {
            color: var(--text-primary);
            font-weight: 600;
        }
        .article em {
            font-style: italic;
            color: var(--text-primary);
        }
        .highlight-box {
            background: rgba(123, 94, 255, .1);
            border-left: 4px solid var(--accent-purple);
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 28px 0;
        }
        .alert-box {
            background: rgba(251, 191, 36, .1);
            border-left: 4px solid var(--warning);
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 28px 0;
        }
        .success-box {
            background: rgba(74, 222, 128, .1);
            border-left: 4px solid var(--success);
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 28px 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
            margin: 28px 0;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
            border: 1px solid var(--border);
        }
        .stat-card .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-orange);
            display: block;
        }
        .stat-card .label {
            font-size: .85rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-top: 4px;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            margin: 28px 0;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: 14px;
            padding: 24px;
            border: 1px solid var(--border);
            transition: transform .3s ease, box-shadow .3s ease;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, .5);
        }
        .feature-card i {
            font-size: 2rem;
            color: var(--accent-purple);
            margin-bottom: 12px;
            display: block;
        }
        .feature-card h4 {
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: .92rem;
            margin-bottom: 0;
        }
        .table-responsive {
            overflow-x: auto;
            margin: 28px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: .95rem;
        }
        table th,
        table td {
            padding: 14px 18px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }
        table th {
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            white-space: nowrap;
        }
        table tr:hover {
            background: rgba(123, 94, 255, .05);
        }
        .img-container {
            margin: 32px 0;
            border-radius: 12px;
            overflow: hidden;
            position: relative;
        }
        .img-container img {
            width: 100%;
            display: block;
            transition: transform .5s ease;
        }
        .img-container:hover img {
            transform: scale(1.02);
        }
        .img-caption {
            padding: 12px 16px;
            background: var(--bg-card);
            font-size: .85rem;
            color: var(--text-muted);
            border-bottom: 1px solid var(--border);
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 16px;
            overflow: hidden;
            background: var(--bg-card);
        }
        .faq-q {
            padding: 18px 22px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-primary);
            transition: background .3s;
        }
        .faq-q:hover {
            background: rgba(123, 94, 255, .08);
        }
        .faq-q::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--accent-purple);
            transition: transform .3s;
        }
        .faq-item[open] .faq-q::after {
            transform: rotate(180deg);
        }
        .faq-a {
            padding: 0 22px 18px;
            color: var(--text-secondary);
        }
        .interaction-section {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 2px solid var(--border);
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 14px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text-primary);
            font-size: 1rem;
            font-family: inherit;
            transition: border-color .3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--accent-purple);
        }
        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            gap: 8px;
            font-size: 1.6rem;
            color: #444;
            cursor: pointer;
        }
        .star-rating i.active {
            color: var(--warning);
        }
        .btn {
            display: inline-block;
            padding: 14px 32px;
            border: none;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-purple));
            color: #fff;
            transition: transform .2s, box-shadow .2s;
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(123, 94, 255, .4);
        }
        .search-wrap {
            background: var(--bg-card);
            border-radius: 50px;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            padding: 4px 4px 4px 20px;
            margin-bottom: 24px;
            transition: border-color .3s;
        }
        .search-wrap:focus-within {
            border-color: var(--accent-purple);
        }
        .search-wrap input {
            flex: 1;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: .95rem;
            padding: 10px 0;
        }
        .search-wrap input:focus {
            outline: none;
        }
        .search-wrap button {
            background: var(--accent-purple);
            border: none;
            border-radius: 50px;
            padding: 10px 22px;
            color: #fff;
            font-weight: 600;
            cursor: pointer;
            transition: background .3s;
        }
        .search-wrap button:hover {
            background: var(--accent-orange);
        }
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            padding: 40px 24px 20px;
            margin-top: 60px;
        }
        .footer-inner {
            max-width: 1400px;
            margin: 0 auto;
            text-align: center;
        }
        .footer friend-link {
            display: block;
            padding: 20px;
            background: var(--bg-card);
            border-radius: 12px;
            margin: 20px 0;
            font-size: .95rem;
        }
        .footer friend-link a {
            color: var(--accent-purple);
            margin: 0 8px;
        }
        .copyright {
            color: var(--text-muted);
            font-size: .85rem;
            padding: 20px 0 0;
            border-top: 1px solid var(--border);
            margin-top: 20px;
        }
        .copyright a {
            color: var(--text-secondary);
        }
        .toc {
            background: var(--bg-card);
            border-radius: 12px;
            padding: 24px;
            border: 1px solid var(--border);
            margin-bottom: 32px;
        }
        .toc h3 {
            font-size: 1.1rem;
            margin-bottom: 14px;
            color: var(--accent-orange);
        }
        .toc ul {
            list-style: none;
            padding-left: 0;
            margin: 0;
        }
        .toc li {
            padding: 6px 0;
            border-bottom: 1px solid rgba(255, 255, 255, .03);
        }
        .toc li:last-child {
            border-bottom: none;
        }
        .toc a {
            color: var(--text-secondary);
            font-size: .9rem;
        }
        .toc a:hover {
            color: var(--accent-purple);
        }
        .toc .toc-h2 {
            padding-left: 0;
            font-weight: 600;
        }
        .toc .toc-h3 {
            padding-left: 20px;
        }
        .toc .toc-h4 {
            padding-left: 40px;
            font-size: .85rem;
        }
        @media (max-width: 768px) {
            .article {
                padding: 24px 16px;
            }
            .article h1 {
                font-size: 1.8rem;
            }
            .article h2 {
                font-size: 1.5rem;
            }
            .article h3 {
                font-size: 1.2rem;
            }
            .main-layout {
                padding: 20px 12px;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }