:root {
            --primary: #00FF41;
            --primary-dark: #00CC33;
            --secondary: #0A1E3F;
            --secondary-light: #1A2E5F;
            --accent: #FF6B35;
            --accent-light: #FFB347;
            --bg-dark: #0D1117;
            --bg-light: #161B22;
            --bg-lighter: #21262D;
            --text-primary: #E6EBED;
            --text-secondary: #8B949E;
            --border-color: #30363D;
            --success: #3FB950;
            --warning: #D29922;
            --error: #F85149;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
            background-color: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* ==================== 导航栏 ==================== */
        .fbcw-navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 72px;
            background: rgba(13, 17, 23, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 clamp(1rem, 5vw, 3rem);
            transition: all 0.3s ease;
        }

        .fbcw-navbar.scrolled {
            background: rgba(13, 17, 23, 0.98);
            box-shadow: 0 4px 20px rgba(0, 255, 65, 0.1);
        }

        .fbcw-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .fbcw-logo img {
            width: 40px;
            height: 40px;
            border-radius: 8px;
        }

        .fbcw-logo:hover {
            color: var(--primary);
            transform: translateY(-2px);
        }

        .fbcw-nav-menu {
            display: flex;
            gap: clamp(0.5rem, 3vw, 2rem);
            align-items: center;
            list-style: none;
        }

        .fbcw-nav-item a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.3s ease;
            position: relative;
        }

        .fbcw-nav-item a:hover,
        .fbcw-nav-item a.active {
            color: var(--primary);
            background-color: rgba(0, 255, 65, 0.1);
        }

        .fbcw-nav-item a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 4px;
            height: 4px;
            background-color: var(--primary);
            border-radius: 50%;
        }

        .fbcw-mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .fbcw-mobile-menu-toggle span {
            width: 24px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        /* ==================== 主要内容区 ==================== */
        .fbcw-page-wrapper {
            margin-top: 72px;
            padding-top: 0;
        }

        .fbcw-container {
            width: 100%;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 clamp(1rem, 5vw, 3rem);
        }

        /* ==================== Hero Section ==================== */
        .fbcw-hero-docs {
            background: linear-gradient(135deg, rgba(0, 255, 65, 0.05) 0%, rgba(255, 107, 53, 0.05) 100%);
            border-bottom: 1px solid var(--border-color);
            padding: clamp(3rem, 8vw, 6rem) 0;
            position: relative;
            overflow: hidden;
        }

        .fbcw-hero-docs::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 255, 65, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .fbcw-hero-docs::after {
            content: '';
            position: absolute;
            bottom: -50%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 107, 53, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .fbcw-hero-docs-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: clamp(2rem, 5vw, 4rem);
            align-items: center;
        }

        .fbcw-hero-docs-text h1 {
            font-size: clamp(2.5rem, 6vw, 4rem);
            font-weight: 800;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .fbcw-hero-docs-text p {
            font-size: clamp(1rem, 2vw, 1.125rem);
            color: var(--text-secondary);
            margin-bottom: 2rem;
            line-height: 1.8;
        }

        .fbcw-breadcrumb {
            display: flex;
            gap: 8px;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }

        .fbcw-breadcrumb-item {
            font-size: 0.875rem;
            color: var(--text-secondary);
        }

        .fbcw-breadcrumb-item.active {
            color: var(--primary);
            font-weight: 600;
        }

        .fbcw-breadcrumb-separator {
            color: var(--border-color);
        }

        .fbcw-hero-docs-image {
            position: relative;
            height: 400px;
            background: linear-gradient(135deg, var(--bg-lighter) 0%, var(--secondary-light) 100%);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .fbcw-hero-docs-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .fbcw-hero-docs-image::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(0, 255, 65, 0.1) 0%, rgba(255, 107, 53, 0.1) 100%);
            pointer-events: none;
            z-index: 1;
        }

        /* ==================== 快速导航 ==================== */
        .fbcw-quick-nav {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 2rem;
            margin: 4rem 0;
        }

        .fbcw-quick-nav-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: var(--primary);
        }

        .fbcw-quick-nav-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
        }

        .fbcw-quick-nav-card {
            padding: 1rem;
            background-color: var(--bg-darker, rgba(0, 0, 0, 0.3));
            border: 1px solid var(--border-color);
            border-radius: 8px;
            text-decoration: none;
            color: var(--text-primary);
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .fbcw-quick-nav-card:hover {
            background-color: rgba(0, 255, 65, 0.08);
            border-color: var(--primary);
            transform: translateX(5px);
        }

        .fbcw-quick-nav-icon {
            font-size: 1.5rem;
            min-width: 30px;
            text-align: center;
        }

        /* ==================== 教程卡片网格 ==================== */
        .fbcw-tutorials-section {
            padding: clamp(3rem, 8vw, 6rem) 0;
            border-bottom: 1px solid var(--border-color);
        }

        .fbcw-section-title {
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .fbcw-section-subtitle {
            font-size: clamp(1rem, 2vw, 1.125rem);
            color: var(--text-secondary);
            margin-bottom: 3rem;
            max-width: 600px;
        }

        .fbcw-tutorials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: clamp(1.5rem, 3vw, 2.5rem);
        }

        .fbcw-tutorial-card {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .fbcw-tutorial-card:hover {
            border-color: var(--primary);
            box-shadow: 0 8px 32px rgba(0, 255, 65, 0.1);
            transform: translateY(-8px);
        }

        .fbcw-tutorial-card-image {
            width: 100%;
            height: 200px;
            background: linear-gradient(135deg, var(--bg-lighter) 0%, var(--secondary-light) 100%);
            overflow: hidden;
            position: relative;
        }

        .fbcw-tutorial-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .fbcw-tutorial-card:hover .fbcw-tutorial-card-image img {
            transform: scale(1.05);
        }

        .fbcw-tutorial-card-image::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
        }

        .fbcw-tutorial-card-content {
            padding: clamp(1.5rem, 3vw, 2rem);
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .fbcw-tutorial-card-category {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
            background-color: rgba(0, 255, 65, 0.1);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 1rem;
            width: fit-content;
        }

        .fbcw-tutorial-card-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .fbcw-tutorial-card-description {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
            flex: 1;
            line-height: 1.6;
        }

        .fbcw-tutorial-card-meta {
            display: flex;
            gap: 1rem;
            font-size: 0.875rem;
            color: var(--text-secondary);
            padding-top: 1rem;
            border-top: 1px solid var(--border-color);
        }

        .fbcw-tutorial-card-meta-item {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .fbcw-tutorial-card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            margin-top: auto;
            transition: all 0.3s ease;
        }

        .fbcw-tutorial-card-link:hover {
            gap: 12px;
            color: var(--primary);
        }

        /* ==================== 分类导航 ==================== */
        .fbcw-category-filter {
            display: flex;
            gap: 1rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }

        .fbcw-category-btn {
            padding: 8px 16px;
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            border-radius: 20px;
            cursor: pointer;
            font-size: 0.95rem;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .fbcw-category-btn:hover,
        .fbcw-category-btn.active {
            background-color: var(--primary);
            color: var(--secondary);
            border-color: var(--primary);
        }

        /* ==================== 常见问题 ==================== */
        .fbcw-faq-section {
            padding: clamp(3rem, 8vw, 6rem) 0;
            border-bottom: 1px solid var(--border-color);
        }

        .fbcw-faq-container {
            max-width: 800px;
        }

        .fbcw-faq-item {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 1rem;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .fbcw-faq-item:hover {
            border-color: var(--primary);
            background-color: rgba(0, 255, 65, 0.02);
        }

        .fbcw-faq-question {
            padding: 1.5rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--text-primary);
            user-select: none;
            transition: all 0.3s ease;
        }

        .fbcw-faq-item.open .fbcw-faq-question {
            color: var(--primary);
        }

        .fbcw-faq-toggle {
            font-size: 1.5rem;
            color: var(--text-secondary);
            transition: transform 0.3s ease;
            min-width: 24px;
            text-align: right;
        }

        .fbcw-faq-item.open .fbcw-faq-toggle {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .fbcw-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background-color: var(--bg-dark);
        }

        .fbcw-faq-item.open .fbcw-faq-answer {
            max-height: 500px;
        }

        .fbcw-faq-answer-content {
            padding: 1.5rem;
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 0.95rem;
        }

        .fbcw-faq-category-badge {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent);
            background-color: rgba(255, 107, 53, 0.1);
            padding: 4px 8px;
            border-radius: 4px;
            margin-top: 0.75rem;
        }

        /* ==================== 高级主题区 ==================== */
        .fbcw-advanced-section {
            padding: clamp(3rem, 8vw, 6rem) 0;
            border-bottom: 1px solid var(--border-color);
        }

        .fbcw-advanced-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: clamp(2rem, 5vw, 4rem);
            align-items: center;
        }

        .fbcw-advanced-content h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .fbcw-advanced-list {
            list-style: none;
        }

        .fbcw-advanced-list-item {
            padding: 1rem 0;
            padding-left: 2rem;
            position: relative;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .fbcw-advanced-list-item::before {
            content: '→';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: 700;
        }

        .fbcw-advanced-image {
            position: relative;
            height: 400px;
            background: linear-gradient(135deg, var(--bg-lighter) 0%, var(--secondary-light) 100%);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .fbcw-advanced-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ==================== 代码示例 ==================== */
        .fbcw-code-section {
            padding: clamp(3rem, 8vw, 6rem) 0;
            border-bottom: 1px solid var(--border-color);
        }

        .fbcw-code-block {
            background-color: var(--bg-lighter);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: clamp(1.5rem, 3vw, 2rem);
            margin: 1.5rem 0;
            overflow-x: auto;
        }

        .fbcw-code-block pre {
            margin: 0;
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
            line-height: 1.6;
            color: var(--text-secondary);
        }

        .fbcw-code-label {
            display: block;
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 1rem;
            font-weight: 600;
        }

        /* ==================== 相关资源 ==================== */
        .fbcw-resources-section {
            padding: clamp(3rem, 8vw, 6rem) 0;
        }

        .fbcw-resources-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: clamp(1.5rem, 3vw, 2.5rem);
        }

        .fbcw-resource-card {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: clamp(1.5rem, 3vw, 2rem);
            text-decoration: none;
            color: var(--text-primary);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .fbcw-resource-card:hover {
            border-color: var(--primary);
            background-color: rgba(0, 255, 65, 0.05);
            transform: translateY(-4px);
        }

        .fbcw-resource-icon {
            font-size: 2rem;
            margin-bottom: 1rem;
        }

        .fbcw-resource-title {
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .fbcw-resource-description {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 1rem;
            flex: 1;
        }

        .fbcw-resource-link {
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.3s ease;
        }

        .fbcw-resource-card:hover .fbcw-resource-link {
            gap: 10px;
        }

        /* ==================== 页脚 ==================== */
        .fbcw-footer {
            background-color: var(--bg-light);
            border-top: 1px solid var(--border-color);
            padding: clamp(3rem, 5vw, 4rem) 0;
            margin-top: clamp(4rem, 8vw, 6rem);
        }

        .fbcw-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: clamp(2rem, 4vw, 3rem);
            margin-bottom: 2rem;
        }

        .fbcw-footer-section h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .fbcw-footer-links {
            list-style: none;
        }

        .fbcw-footer-links li {
            margin-bottom: 0.75rem;
        }

        .fbcw-footer-links a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: all 0.3s ease;
            font-size: 0.95rem;
        }

        .fbcw-footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .fbcw-footer-brand {
            color: var(--text-primary);
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .fbcw-footer-description {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 1rem;
        }

        .fbcw-footer-divider {
            border-top: 1px solid var(--border-color);
            padding-top: 2rem;
            margin-top: 2rem;
        }

        .fbcw-footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .fbcw-footer-socials {
            display: flex;
            gap: 1rem;
        }

        .fbcw-footer-social-link {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background-color: var(--bg-dark);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .fbcw-footer-social-link:hover {
            background-color: var(--primary);
            color: var(--secondary);
            border-color: var(--primary);
        }

        /* ==================== 响应式设计 ==================== */
        @media (max-width: 1024px) {
            .fbcw-hero-docs-content {
                grid-template-columns: 1fr;
            }

            .fbcw-hero-docs-image {
                height: 300px;
            }

            .fbcw-advanced-grid {
                grid-template-columns: 1fr;
            }

            .fbcw-tutorials-grid {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .fbcw-navbar {
                padding: 0 1rem;
            }

            .fbcw-nav-menu {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background-color: var(--bg-light);
                border-bottom: 1px solid var(--border-color);
                flex-direction: column;
                gap: 0;
                display: none;
                border-radius: 0;
                max-height: 400px;
                overflow-y: auto;
            }

            .fbcw-nav-menu.mobile-open {
                display: flex;
            }

            .fbcw-nav-item {
                width: 100%;
            }

            .fbcw-nav-item a {
                display: block;
                padding: 12px 1rem;
                border-radius: 0;
            }

            .fbcw-mobile-menu-toggle {
                display: flex;
            }

            .fbcw-page-wrapper {
                margin-top: 72px;
            }

            .fbcw-container {
                padding: 0 1rem;
            }

            .fbcw-hero-docs {
                padding: 2rem 0;
            }

            .fbcw-hero-docs-text h1 {
                font-size: 2rem;
            }

            .fbcw-tutorials-grid {
                grid-template-columns: 1fr;
            }

            .fbcw-quick-nav-grid {
                grid-template-columns: 1fr;
            }

            .fbcw-footer-content {
                grid-template-columns: 1fr;
            }

            .fbcw-footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .fbcw-faq-question {
                padding: 1rem;
            }

            .fbcw-faq-answer-content {
                padding: 1rem;
            }
        }

        @media (max-width: 480px) {
            .fbcw-navbar {
                height: 64px;
            }

            .fbcw-page-wrapper {
                margin-top: 64px;
            }

            .fbcw-hero-docs-text h1 {
                font-size: 1.5rem;
            }

            .fbcw-section-title {
                font-size: 1.5rem;
            }

            .fbcw-breadcrumb {
                font-size: 0.8rem;
            }

            .fbcw-quick-nav {
                padding: 1.5rem;
            }

            .fbcw-tutorial-card-content {
                padding: 1rem;
            }

            .fbcw-category-filter {
                gap: 0.5rem;
            }

            .fbcw-category-btn {
                padding: 6px 12px;
                font-size: 0.85rem;
            }

            .fbcw-footer-socials {
                gap: 0.5rem;
            }

            .fbcw-footer-social-link {
                width: 32px;
                height: 32px;
            }

            .fbcw-code-block {
                padding: 1rem;
                font-size: 0.8rem;
            }

            .fbcw-logo {
                font-size: 1rem;
            }

            .fbcw-logo img {
                width: 32px;
                height: 32px;
            }
        }

        /* ==================== 辅助类 ==================== */
        .fbcw-hidden {
            display: none !important;
        }

        .fbcw-sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border-width: 0;
        }

        .fbcw-accent-text {
            color: var(--primary);
        }

        .fbcw-accent-bg {
            background-color: rgba(0, 255, 65, 0.1);
        }

        .fbcw-mt-large {
            margin-top: clamp(2rem, 5vw, 4rem);
        }

        .fbcw-mb-large {
            margin-bottom: clamp(2rem, 5vw, 4rem);
        }

        /* ==================== 平滑过渡 ==================== */
        .fbcw-fade-in {
            animation: fbcw-fadeIn 0.6s ease-in-out;
        }

        @keyframes fbcw-fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }