:root {
            --eztx-primary: #D43222;
            --eztx-primary-dark: #B0281B;
            --eztx-accent: #FF5E5E;
            --eztx-text-main: #2D3436;
            --eztx-text-muted: #636E72;
            --eztx-bg-light: #F9FAFB;
            --eztx-bg-white: #FFFFFF;
            --eztx-glass: rgba(255, 255, 255, 0.8);
            --eztx-shadow: 0 10px 30px rgba(0,0,0,0.05);
            --eztx-radius: 16px;
        }

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

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            color: var(--eztx-text-main);
            background-color: var(--eztx-bg-light);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 布局容器 */
        .eztx-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏设计：悬浮岛屿风格 */
        .eztx-header {
            position: fixed;
            top: 20px;
            left: 0;
            right: 0;
            z-index: 1000;
            transition: all 0.3s ease;
        }

        .eztx-nav-wrapper {
            background: var(--eztx-glass);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 100px;
            padding: 8px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            box-shadow: var(--eztx-shadow);
            flex-wrap: wrap;
        }

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

        .eztx-logo img {
            height: 32px;
            width: auto;
            object-fit: contain;
        }

        .eztx-nav-menu {
            display: flex;
            list-style: none;
            gap: 8px;
            flex-wrap: wrap;
        }

        .eztx-nav-item a {
            text-decoration: none;
            color: var(--eztx-text-main);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 50px;
            transition: all 0.2s;
            white-space: nowrap;
        }

        .eztx-nav-item a:hover {
            background: rgba(212, 50, 34, 0.05);
            color: var(--eztx-primary);
        }

        .eztx-nav-item a.eztx-active {
            background: var(--eztx-primary);
            color: white;
        }

        /* Hero 区：对角线构图 */
        .eztx-hero {
            padding-top: 180px;
            padding-bottom: 96px;
            background: radial-gradient(circle at top right, rgba(212, 50, 34, 0.03) 0%, transparent 40%),
                        radial-gradient(circle at bottom left, rgba(212, 50, 34, 0.03) 0%, transparent 40%);
            position: relative;
            overflow: hidden;
        }

        .eztx-hero-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .eztx-hero-content {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .eztx-hero-tag {
            display: inline-block;
            background: rgba(212, 50, 34, 0.1);
            color: var(--eztx-primary);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .eztx-hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #2D3436 0%, #636E72 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            word-break: keep-all;
        }

        .eztx-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.3rem);
            color: var(--eztx-text-muted);
            margin-bottom: 40px;
            max-width: 600px;
            line-height: 1.8;
        }

        /* 核心下载卡片 */
        .eztx-hero-visual {
            flex: 1;
            min-width: 320px;
            display: flex;
            justify-content: center;
        }

        .eztx-download-card {
            background: var(--eztx-bg-white);
            border-radius: 32px;
            padding: 40px;
            width: 100%;
            max-width: 480px;
            box-shadow: 0 40px 80px rgba(0,0,0,0.08);
            border: 1px solid rgba(0,0,0,0.03);
            text-align: center;
            transition: transform 0.3s ease;
        }

        .eztx-download-card:hover {
            transform: translateY(-10px);
        }

        .eztx-btn-main {
            display: block;
            background: linear-gradient(135deg, var(--eztx-primary) 0%, var(--eztx-accent) 100%);
            color: white;
            text-decoration: none;
            padding: 20px 40px;
            border-radius: 16px;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 20px;
            box-shadow: 0 10px 20px rgba(212, 50, 34, 0.3);
            transition: all 0.3s;
        }

        .eztx-btn-main:hover {
            box-shadow: 0 15px 30px rgba(212, 50, 34, 0.4);
            transform: scale(1.02);
        }

        .eztx-version-info {
            font-size: 14px;
            color: var(--eztx-text-muted);
            display: flex;
            justify-content: center;
            gap: 16px;
        }

        /* 协作引擎区块 */
        .eztx-section {
            padding: 96px 0;
            word-break: break-word;
        }

        .eztx-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .eztx-section-title {
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            margin-bottom: 16px;
        }

        .eztx-engine-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .eztx-engine-card {
            background: var(--eztx-bg-white);
            border-radius: var(--eztx-radius);
            padding: 40px;
            transition: all 0.3s;
            border: 1px solid transparent;
            display: flex;
            flex-direction: column;
            min-height: 0;
        }

        .eztx-engine-card:hover {
            border-color: var(--eztx-primary);
            box-shadow: var(--eztx-shadow);
        }

        .eztx-engine-icon {
            font-size: 40px;
            margin-bottom: 24px;
            background: var(--eztx-bg-light);
            width: 80px;
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 20px;
        }

        .eztx-engine-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .eztx-engine-highlight {
            color: var(--eztx-text-muted);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .eztx-engine-metrics {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            border-top: 1px dashed #eee;
            padding-top: 24px;
        }

        .eztx-metric-pill {
            background: var(--eztx-bg-light);
            padding: 4px 12px;
            border-radius: 8px;
            font-size: 12px;
            color: var(--eztx-primary);
            font-weight: 600;
        }

        /* 功能卡片列表 */
        .eztx-feature-row {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
            margin-bottom: 64px;
        }

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

        .eztx-feature-text {
            flex: 1;
            min-width: 300px;
        }

        .eztx-feature-visual-box {
            flex: 1;
            min-width: 300px;
            background: linear-gradient(45deg, #f3f3f3, #ffffff);
            height: 300px;
            border-radius: 24px;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(0,0,0,0.05);
        }

        .eztx-feature-visual-box::after {
            content: "";
            position: absolute;
            width: 70%;
            height: 70%;
            background: rgba(212, 50, 34, 0.05);
            border-radius: 20px;
            transform: rotate(-5deg);
        }

        /* 底部 CTA */
        .eztx-cta {
            background: var(--eztx-text-main);
            color: white;
            border-radius: 40px;
            padding: 80px 40px;
            text-align: center;
            margin-bottom: 96px;
        }

        .eztx-cta h2 {
            font-size: clamp(2rem, 5vw, 3rem);
            margin-bottom: 24px;
        }

        /* 页脚 */
        .eztx-footer {
            background: var(--eztx-bg-white);
            padding: 64px 0 32px;
            border-top: 1px solid #eee;
        }

        .eztx-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 48px;
        }

        .eztx-footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--eztx-primary);
            margin-bottom: 16px;
        }

        .eztx-footer-links h4 {
            margin-bottom: 24px;
            font-size: 16px;
        }

        .eztx-footer-links ul {
            list-style: none;
        }

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

        .eztx-footer-links a {
            text-decoration: none;
            color: var(--eztx-text-muted);
            font-size: 14px;
            transition: color 0.2s;
        }

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

        .eztx-footer-bottom {
            padding-top: 32px;
            border-top: 1px solid #f0f0f0;
            text-align: center;
            font-size: 13px;
            color: var(--eztx-text-muted);
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .eztx-nav-wrapper {
                border-radius: 20px;
                padding: 12px;
            }
            .eztx-nav-menu {
                justify-content: center;
                margin-top: 12px;
                width: 100%;
            }
        }

        @media (max-width: 768px) {
            .eztx-hero {
                padding-top: 140px;
            }
            .eztx-hero-title {
                text-align: center;
            }
            .eztx-hero-subtitle {
                text-align: center;
                margin-left: auto;
                margin-right: auto;
            }
            .eztx-hero-grid {
                flex-direction: column;
            }
            .eztx-hero-content {
                text-align: center;
            }
            .eztx-engine-grid {
                grid-template-columns: 1fr;
            }
        }