:root {
            --fti6a-primary: #EE4136;
            --fti6a-primary-light: #ff6b62;
            --fti6a-dark: #1d1d1f;
            --fti6a-text: #333333;
            --fti6a-gray: #f5f5f7;
            --fti6a-accent: #0071e3;
            --fti6a-white: #ffffff;
            --fti6a-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --fti6a-radius: 16px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--fti6a-text);
            line-height: 1.6;
            overflow-x: hidden;
            background-color: var(--fti6a-white);
            word-break: break-word;
        }

        /* 导航栏 */
        .fti6a-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: 16px 0;
        }

        .fti6a-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 32px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

        .fti6a-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .fti6a-logo img {
            height: 32px;
            display: block;
        }

        .fti6a-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .fti6a-nav-menu a {
            text-decoration: none;
            color: var(--fti6a-dark);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s;
        }

        .fti6a-nav-menu a:hover {
            color: var(--fti6a-primary);
        }

        /* Hero下载区 */
        .fti6a-hero {
            padding: 160px 32px 96px;
            background: radial-gradient(circle at 80% 20%, rgba(238, 65, 54, 0.05) 0%, rgba(255, 255, 255, 1) 50%);
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            text-align: center;
        }

        .fti6a-hero-content {
            max-width: 900px;
            min-width: 0;
            flex: 1 1 100%;
        }

        .fti6a-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            color: var(--fti6a-dark);
            margin-bottom: 24px;
            letter-spacing: -0.02em;
            word-break: keep-all;
        }

        .fti6a-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.5rem);
            color: #666;
            margin-bottom: 48px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
        }

        .fti6a-download-main {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
            margin-bottom: 64px;
        }

        .fti6a-btn-primary {
            background: linear-gradient(135deg, var(--fti6a-primary) 0%, #ff4b2b 100%);
            color: white;
            padding: 20px 48px;
            border-radius: 50px;
            text-decoration: none;
            font-size: 1.25rem;
            font-weight: 600;
            box-shadow: 0 10px 25px rgba(238, 65, 54, 0.3);
            transition: transform 0.3s, box-shadow 0.3s;
            display: inline-flex;
            align-items: center;
        }

        .fti6a-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(238, 65, 54, 0.4);
        }

        /* 版本卡片区 */
        .fti6a-section-versions {
            padding: 64px 32px;
            max-width: 1400px;
            margin: 0 auto;
        }

        .fti6a-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .fti6a-card {
            background: var(--fti6a-gray);
            padding: 40px;
            border-radius: var(--fti6a-radius);
            border: 1px solid rgba(0,0,0,0.03);
            transition: all 0.3s ease;
            min-width: 0;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .fti6a-card:hover {
            background: var(--fti6a-white);
            box-shadow: var(--fti6a-shadow);
            transform: translateY(-8px);
        }

        .fti6a-card-tag {
            display: inline-block;
            background: rgba(238, 65, 54, 0.1);
            color: var(--fti6a-primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .fti6a-card-title {
            font-size: 1.75rem;
            margin-bottom: 12px;
            color: var(--fti6a-dark);
        }

        .fti6a-card-desc {
            color: #666;
            margin-bottom: 24px;
            font-size: 1rem;
        }

        .fti6a-card-footer {
            margin-top: auto;
        }

        .fti6a-link-action {
            color: var(--fti6a-primary);
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* 功能特性区 - 错位排版 */
        .fti6a-features {
            padding: 96px 0;
            overflow: hidden;
        }

        .fti6a-feature-row {
            max-width: 1400px;
            margin: 0 auto 120px;
            padding: 0 32px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .fti6a-feature-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .fti6a-feature-text {
            flex: 1 1 450px;
            min-width: 0;
        }

        .fti6a-feature-visual {
            flex: 1 1 550px;
            min-width: 0;
            height: 400px;
            background: linear-gradient(135deg, #fdfcfb 0%, #e2d1c3 100%);
            border-radius: 30px;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* 用CSS画一个模拟输入法界面的效果，代替缺失的图片 */
        .fti6a-ui-mockup {
            width: 80%;
            height: 60px;
            background: white;
            border-radius: 12px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            padding: 0 20px;
            display: flex;
            align-items: center;
            font-weight: 600;
            color: var(--fti6a-primary);
        }

        .fti6a-ui-mockup::after {
            content: '';
            width: 2px;
            height: 24px;
            background: var(--fti6a-primary);
            margin-left: 4px;
            animation: fti6a-blink 1s infinite;
        }

        @keyframes fti6a-blink {
            50% { opacity: 0; }
        }

        .fti6a-feature-title {
            font-size: clamp(2rem, 3vw, 2.5rem);
            font-weight: 700;
            margin-bottom: 24px;
            line-height: 1.2;
        }

        .fti6a-feature-p {
            font-size: 1.125rem;
            color: #666;
            margin-bottom: 32px;
        }

        /* 动态内容区 */
        .fti6a-dynamic-section {
            background-color: var(--fti6a-gray);
            padding: 96px 32px;
        }

        .fti6a-section-header {
            max-width: 1400px;
            margin: 0 auto 48px;
            text-align: center;
        }

        .fti6a-news-grid {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .fti6a-news-item {
            background: var(--fti6a-white);
            padding: 32px;
            border-radius: 12px;
            text-decoration: none;
            color: inherit;
            transition: transform 0.3s;
        }

        .fti6a-news-item:hover {
            transform: scale(1.02);
        }

        .fti6a-news-date {
            font-size: 14px;
            color: #999;
            margin-bottom: 12px;
            display: block;
        }

        /* 页脚 */
        .fti6a-footer {
            padding: 80px 32px;
            background: var(--fti6a-dark);
            color: #86868b;
        }

        .fti6a-footer-container {
            max-width: 1400px;
            margin: 0 auto;
        }

        .fti6a-footer-top {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid #333;
        }

        .fti6a-footer-brand {
            flex: 1 1 300px;
        }

        .fti6a-footer-brand-name {
            color: var(--fti6a-white);
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .fti6a-footer-links {
            flex: 2 1 600px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 32px;
        }

        .fti6a-footer-links h4 {
            color: var(--fti6a-white);
            margin-bottom: 16px;
            font-size: 14px;
        }

        .fti6a-footer-links ul {
            list-style: none;
        }

        .fti6a-footer-links li {
            margin-bottom: 8px;
        }

        .fti6a-footer-links a {
            color: #86868b;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .fti6a-footer-links a:hover {
            color: var(--fti6a-white);
        }

        .fti6a-footer-bottom {
            padding-top: 32px;
            font-size: 12px;
            text-align: center;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .fti6a-nav-menu {
                display: none; /* 简化处理，实际开发可加汉堡菜单 */
            }
            .fti6a-hero {
                padding: 120px 20px 64px;
            }
            .fti6a-feature-row {
                gap: 32px;
            }
            .fti6a-feature-visual {
                height: 250px;
            }
        }