:root {
            --kz1b-primary: #FF9100;
            --kz1b-primary-hover: #E68200;
            --kz1b-bg-light: #F8FAFC;
            --kz1b-text-main: #1D2129;
            --kz1b-text-sub: #4E5969;
            --kz1b-white: #FFFFFF;
            --kz1b-shadow: 0 8px 30px rgba(0,0,0,0.08);
            --kz1b-radius: 16px;
            --kz1b-max-width: 1400px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--kz1b-bg-light);
            color: var(--kz1b-text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 导航栏设计 */
        .kz1b-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .kz1b-nav-container {
            max-width: var(--kz1b-max-width);
            margin: 0 auto;
            padding: 0 48px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            height: 80px;
        }

        .kz1b-logo {
            flex-shrink: 0;
            min-width: 0;
        }

        .kz1b-logo img {
            height: 32px;
            display: block;
        }

        .kz1b-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .kz1b-menu li {
            min-width: 0;
        }

        .kz1b-menu a {
            text-decoration: none;
            color: var(--kz1b-text-sub);
            font-weight: 500;
            font-size: 15px;
            transition: color 0.3s;
            word-break: keep-all;
        }

        .kz1b-menu a:hover, .kz1b-menu a.active {
            color: var(--kz1b-primary);
        }

        /* Hero 区域：非对称卡片布局 */
        .kz1b-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            position: relative;
            background: radial-gradient(circle at 90% 10%, rgba(255, 145, 0, 0.05) 0%, transparent 40%);
        }

        .kz1b-container {
            max-width: var(--kz1b-max-width);
            margin: 0 auto;
            padding: 0 48px;
            word-break: break-word;
        }

        .kz1b-hero-wrapper {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .kz1b-hero-content {
            flex: 1;
            min-width: 320px;
        }

        .kz1b-hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--kz1b-text-main);
        }

        .kz1b-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--kz1b-text-sub);
            margin-bottom: 48px;
            max-width: 600px;
        }

        .kz1b-download-box {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .kz1b-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 18px 42px;
            border-radius: 50px;
            font-size: 18px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
            cursor: pointer;
            min-width: 0;
        }

        .kz1b-btn-primary {
            background: var(--kz1b-primary);
            color: white;
            box-shadow: 0 10px 20px rgba(255, 145, 0, 0.3);
        }

        .kz1b-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(255, 145, 0, 0.4);
        }

        .kz1b-btn-outline {
            background: white;
            color: var(--kz1b-text-main);
            border: 2px solid #E5E6EB;
        }

        .kz1b-btn-outline:hover {
            border-color: var(--kz1b-primary);
            color: var(--kz1b-primary);
        }

        /* 安全展示区 */
        .kz1b-section-security {
            padding: 96px 0;
            background: var(--kz1b-white);
        }

        .kz1b-flex-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 80px;
        }

        .kz1b-image-container {
            flex: 1.2;
            min-width: 300px;
        }

        .kz1b-image-container img {
            width: 100%;
            height: auto;
            border-radius: var(--kz1b-radius);
            box-shadow: var(--kz1b-shadow);
        }

        .kz1b-text-container {
            flex: 1;
            min-width: 300px;
        }

        .kz1b-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 145, 0, 0.1);
            color: var(--kz1b-primary);
            border-radius: 4px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        /* 垂直行业解决方案 - 网格布局 */
        .kz1b-industry-section {
            padding: 96px 0;
        }

        .kz1b-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .kz1b-section-title h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .kz1b-grid-industry {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
            gap: 32px;
        }

        .kz1b-industry-card {
            background: var(--kz1b-white);
            padding: 40px;
            border-radius: var(--kz1b-radius);
            transition: all 0.3s;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .kz1b-industry-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--kz1b-shadow);
        }

        .kz1b-industry-icon {
            font-size: 32px;
            margin-bottom: 24px;
            display: block;
        }

        .kz1b-industry-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--kz1b-primary);
        }

        .kz1b-tool-tag {
            background: #F2F3F5;
            padding: 10px 16px;
            border-radius: 8px;
            margin-bottom: 12px;
            font-size: 14px;
            color: var(--kz1b-text-sub);
        }

        /* 版本对比区 */
        .kz1b-version-section {
            padding: 96px 0;
            background: #1D2129;
            color: white;
            border-radius: 40px;
            margin: 0 24px;
        }

        .kz1b-version-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
        }

        .kz1b-version-img {
            flex: 1;
            min-width: 300px;
        }

        .kz1b-version-img img {
            width: 100%;
            border-radius: 20px;
        }

        /* 安装指南 */
        .kz1b-install-section {
            padding: 96px 0;
        }

        .kz1b-install-step-container {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 48px;
        }

        .kz1b-step-item {
            flex: 1;
            min-width: 260px;
            background: var(--kz1b-white);
            padding: 32px;
            border-radius: var(--kz1b-radius);
            position: relative;
        }

        .kz1b-step-number {
            font-size: 48px;
            font-weight: 900;
            color: rgba(255, 145, 0, 0.1);
            position: absolute;
            top: 20px;
            right: 20px;
        }

        /* 页脚 */
        .kz1b-footer {
            background: #F2F3F5;
            padding: 80px 0 40px;
            margin-top: 96px;
        }

        .kz1b-footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 64px;
        }

        .kz1b-footer-brand h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--kz1b-text-main);
        }

        .kz1b-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
        }

        .kz1b-footer-col h4 {
            margin-bottom: 24px;
            font-size: 16px;
        }

        .kz1b-footer-col ul {
            list-style: none;
        }

        .kz1b-footer-col li {
            margin-bottom: 12px;
        }

        .kz1b-footer-col a {
            text-decoration: none;
            color: var(--kz1b-text-sub);
            font-size: 14px;
            transition: color 0.3s;
        }

        .kz1b-footer-col a:hover {
            color: var(--kz1b-primary);
        }

        .kz1b-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(0,0,0,0.05);
            color: #86909C;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .kz1b-nav-container { padding: 0 24px; }
            .kz1b-menu { display: none; } /* 简化处理，实际开发可加汉堡菜单 */
        }

        @media (max-width: 768px) {
            .kz1b-hero-wrapper { text-align: center; justify-content: center; }
            .kz1b-download-box { justify-content: center; }
            .kz1b-flex-row { flex-direction: column-reverse; }
            .kz1b-version-wrapper { flex-direction: column; }
            .kz1b-container { padding: 0 24px; }
            .kz1b-version-section { margin: 0 12px; border-radius: 20px; }
        }