:root {
            --r6tl-primary: #FF6C37; /* Postman Orange */
            --r6tl-accent: #00F2FE;
            --r6tl-bg-dark: #0a0b10;
            --r6tl-bg-card: #161b22;
            --r6tl-text-main: #e6edf3;
            --r6tl-text-muted: #8b949e;
            --r6tl-spacing-unit: 8px;
            --r6tl-container-width: 1100px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--r6tl-bg-dark);
            color: var(--r6tl-text-main);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航栏设计 */
        .r6tl-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 11, 16, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .r6tl-nav-container {
            max-width: var(--r6tl-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 24px;
        }

        .r6tl-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .r6tl-logo img {
            height: 32px;
            width: auto;
        }

        .r6tl-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 12px;
            min-width: 0;
        }

        .r6tl-nav-link {
            text-decoration: none;
            color: var(--r6tl-text-muted);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .r6tl-nav-link:hover {
            color: var(--r6tl-primary);
            background: rgba(255, 108, 55, 0.1);
        }

        .r6tl-nav-link.r6tl-active {
            color: #fff;
            background: var(--r6tl-primary);
        }

        /* Hero 区块 - 独特排版 */
        .r6tl-hero {
            padding: 160px 24px 80px;
            text-align: center;
            position: relative;
            background: radial-gradient(circle at 50% 0%, rgba(255, 108, 55, 0.15) 0%, transparent 50%);
        }

        .r6tl-hero-inner {
            max-width: 900px;
            margin: 0 auto;
        }

        .r6tl-hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(0, 242, 254, 0.1);
            color: var(--r6tl-accent);
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(0, 242, 254, 0.2);
        }

        .r6tl-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #fff 0%, #888 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .r6tl-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--r6tl-text-muted);
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.6;
        }

        /* 主体内容区块 */
        .r6tl-section {
            padding: 64px 24px;
            max-width: var(--r6tl-container-width);
            margin: 0 auto;
        }

        .r6tl-grid-matrix {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .r6tl-card {
            background: var(--r6tl-bg-card);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: 20px;
            padding: 40px;
            transition: transform 0.3s ease, border-color 0.3s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .r6tl-card:hover {
            transform: translateY(-8px);
            border-color: var(--r6tl-primary);
        }

        .r6tl-card-stage {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--r6tl-primary);
            margin-bottom: 16px;
            font-weight: 700;
        }

        .r6tl-card-title {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
        }

        .r6tl-card-method {
            font-size: 16px;
            color: var(--r6tl-accent);
            margin-bottom: 24px;
            padding-bottom: 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .r6tl-tool-item {
            margin-bottom: 20px;
        }

        .r6tl-tool-name {
            display: block;
            font-weight: 600;
            color: #fff;
            font-size: 14px;
            margin-bottom: 4px;
        }

        .r6tl-tool-desc {
            font-size: 14px;
            color: var(--r6tl-text-muted);
            line-height: 1.5;
        }

        /* 教程流 - 路径式布局 */
        .r6tl-tutorial-flow {
            background: #0d1117;
            padding: 96px 24px;
            border-radius: 40px;
            margin: 48px 24px;
        }

        .r6tl-flow-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .r6tl-flow-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .r6tl-path {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: center;
        }

        .r6tl-step {
            flex: 1;
            min-width: 260px;
            background: rgba(255, 255, 255, 0.02);
            padding: 32px;
            border-radius: 16px;
            position: relative;
        }

        .r6tl-step-num {
            position: absolute;
            top: -20px;
            left: 32px;
            width: 40px;
            height: 40px;
            background: var(--r6tl-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(255, 108, 55, 0.3);
        }

        /* 侧边图文混排 */
        .r6tl-feature-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 96px;
        }

        .r6tl-feature-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .r6tl-feature-content {
            flex: 1;
            min-width: 300px;
        }

        .r6tl-feature-visual {
            flex: 1;
            min-width: 300px;
            background: linear-gradient(135deg, #1e252e 0%, #0a0b10 100%);
            height: 350px;
            border-radius: 24px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .r6tl-visual-blob {
            position: absolute;
            width: 200px;
            height: 200px;
            background: var(--r6tl-primary);
            filter: blur(80px);
            opacity: 0.2;
        }

        /* 按钮设计 */
        .r6tl-btn {
            display: inline-block;
            padding: 14px 32px;
            border-radius: 12px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
            font-size: 16px;
        }

        .r6tl-btn-primary {
            background: var(--r6tl-primary);
            color: #fff;
            box-shadow: 0 4px 15px rgba(255, 108, 55, 0.3);
        }

        .r6tl-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 108, 55, 0.4);
        }

        /* 页脚 */
        .r6tl-footer {
            background: #050608;
            padding: 80px 24px 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .r6tl-footer-grid {
            max-width: var(--r6tl-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .r6tl-footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .r6tl-footer-text {
            color: var(--r6tl-text-muted);
            font-size: 14px;
            margin-bottom: 24px;
        }

        .r6tl-footer-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 24px;
            color: #fff;
        }

        .r6tl-footer-links {
            list-style: none;
        }

        .r6tl-footer-links li {
            margin-bottom: 12px;
        }

        .r6tl-footer-links a {
            color: var(--r6tl-text-muted);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .r6tl-footer-links a:hover {
            color: var(--r6tl-primary);
        }

        .r6tl-copyright {
            max-width: var(--r6tl-container-width);
            margin: 0 auto;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
            color: var(--r6tl-text-muted);
            font-size: 12px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .r6tl-nav-container {
                flex-direction: column;
                gap: 16px;
            }
            .r6tl-nav-menu {
                justify-content: center;
            }
            .r6tl-hero {
                padding-top: 200px;
            }
            .r6tl-feature-row {
                gap: 32px;
            }
        }