:root {
            --kz1b-primary: #FF9100;
            --kz1b-primary-dark: #E68200;
            --kz1b-bg: #F8F9FA;
            --kz1b-text: #1D1D1F;
            --kz1b-text-light: #6E6E73;
            --kz1b-white: #FFFFFF;
            --kz1b-card-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --kz1b-step: 8px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            background-color: var(--kz1b-bg);
            color: var(--kz1b-text);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        .kz1b-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 40px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .kz1b-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .kz1b-logo img {
            height: 32px;
            width: auto;
        }

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

        .kz1b-nav-item a {
            text-decoration: none;
            color: var(--kz1b-text);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

        .kz1b-nav-item a:hover {
            color: var(--kz1b-primary);
        }

        .kz1b-nav-item.active a {
            color: var(--kz1b-primary);
            position: relative;
        }

        .kz1b-nav-item.active a::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--kz1b-primary);
        }

        /* 核心布局容器 */
        .kz1b-main-wrapper {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 40px;
            min-width: 0;
        }

        /* Hero 区 - 独特上下结构 */
        .kz1b-hero {
            padding-top: 160px;
            padding-bottom: 80px;
            text-align: center;
            background: linear-gradient(180deg, #FFFFFF 0%, #F8F9FA 100%);
            word-break: break-word;
        }

        .kz1b-hero-badge {
            display: inline-block;
            background: rgba(255, 145, 0, 0.1);
            color: var(--kz1b-primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .kz1b-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            color: #000;
            word-break: keep-all;
        }

        .kz1b-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.5rem);
            color: var(--kz1b-text-light);
            max-width: 800px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }

        /* 下载区块 - 独特的卡片网格 */
        .kz1b-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: -40px;
            margin-bottom: 96px;
            position: relative;
            z-index: 10;
        }

        .kz1b-download-card {
            background: var(--kz1b-white);
            border-radius: 24px;
            padding: 48px;
            box-shadow: var(--kz1b-card-shadow);
            transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1), box-shadow 0.4s ease;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            border: 1px solid rgba(0,0,0,0.03);
            min-width: 0;
        }

        .kz1b-download-card:hover {
            transform: translateY(-12px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.12);
        }

        .kz1b-card-tag {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--kz1b-text-light);
            margin-bottom: 16px;
        }

        .kz1b-card-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .kz1b-card-desc {
            color: var(--kz1b-text-light);
            margin-bottom: 32px;
            font-size: 16px;
        }

        .kz1b-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--kz1b-primary);
            color: white;
            padding: 16px 32px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            width: 100%;
        }

        .kz1b-btn:hover {
            background: var(--kz1b-primary-dark);
            box-shadow: 0 8px 20px rgba(255, 145, 0, 0.3);
        }

        .kz1b-btn-secondary {
            background: #F2F2F7;
            color: var(--kz1b-text);
            margin-top: 12px;
        }

        .kz1b-btn-secondary:hover {
            background: #E5E5EA;
            box-shadow: none;
        }

        /* 行业解决方案区块 - 对角线视觉分割 */
        .kz1b-solutions-section {
            padding: 96px 0;
            background: #000;
            color: #FFF;
            border-radius: 40px;
            margin-bottom: 96px;
            overflow: hidden;
            position: relative;
        }

        .kz1b-solutions-header {
            text-align: center;
            margin-bottom: 64px;
            padding: 0 40px;
        }

        .kz1b-solutions-header h2 {
            font-size: clamp(2rem, 3vw + 1rem, 3rem);
            margin-bottom: 16px;
        }

        .kz1b-solutions-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            padding: 0 40px;
        }

        .kz1b-solution-item {
            flex: 1;
            min-width: 300px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 40px;
            border-radius: 24px;
            transition: background 0.3s ease;
        }

        .kz1b-solution-item:hover {
            background: rgba(255, 255, 255, 0.1);
        }

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

        .kz1b-tool-list {
            list-style: none;
        }

        .kz1b-tool-list li {
            margin-bottom: 16px;
            font-size: 15px;
            color: #CCC;
            display: flex;
            align-items: flex-start;
        }

        .kz1b-tool-list li::before {
            content: "•";
            color: var(--kz1b-primary);
            font-weight: bold;
            display: inline-block;
            width: 1em;
            margin-left: -1em;
        }

        /* 资讯区块 */
        .kz1b-dynamic-news {
            padding: 96px 0;
            word-break: break-word;
        }

        .kz1b-news-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 48px;
        }

        .kz1b-news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .kz1b-news-item {
            border-bottom: 1px solid rgba(0,0,0,0.1);
            padding-bottom: 24px;
        }

        .kz1b-news-item h3 {
            font-size: 18px;
            margin-bottom: 12px;
        }

        .kz1b-news-date {
            font-size: 14px;
            color: var(--kz1b-text-light);
        }

        /* 页脚 */
        .kz1b-footer {
            background: #F2F2F7;
            padding: 80px 40px;
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .kz1b-footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .kz1b-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .kz1b-footer-brand-name {
            font-size: 24px;
            font-weight: 700;
            color: var(--kz1b-text);
            margin-bottom: 16px;
        }

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

        .kz1b-link-group h4 {
            margin-bottom: 24px;
            font-size: 14px;
            color: var(--kz1b-text-light);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .kz1b-link-group ul {
            list-style: none;
        }

        .kz1b-link-group ul li {
            margin-bottom: 12px;
        }

        .kz1b-link-group ul li a {
            text-decoration: none;
            color: var(--kz1b-text);
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .kz1b-link-group ul li a:hover {
            color: var(--kz1b-primary);
        }

        .kz1b-copyright {
            margin-top: 80px;
            padding-top: 24px;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            font-size: 12px;
            color: var(--kz1b-text-light);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .kz1b-nav-container {
                padding: 0 20px;
                height: auto;
                padding-top: 16px;
                padding-bottom: 16px;
            }
            .kz1b-nav-menu {
                gap: 12px;
                margin-top: 12px;
                justify-content: center;
                width: 100%;
            }
            .kz1b-main-wrapper {
                padding: 0 20px;
            }
            .kz1b-hero {
                padding-top: 120px;
            }
            .kz1b-download-grid {
                grid-template-columns: 1fr;
                margin-top: 0;
            }
            .kz1b-solution-item {
                flex: none;
                width: 100%;
            }
            .kz1b-footer-links {
                gap: 32px;
            }
        }