:root {
            --owxzu4-primary: #D42E2D;
            --owxzu4-primary-hover: #B82525;
            --owxzu4-dark: #1D1D1F;
            --owxzu4-gray-text: #86868B;
            --owxzu4-light-bg: #F5F5F7;
            --owxzu4-white: #FFFFFF;
            --owxzu4-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --owxzu4-shell-width: 1300px;
        }

        * {
            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(--owxzu4-dark);
            line-height: 1.6;
            background-color: var(--owxzu4-white);
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航系统 - Pilot */
        .owxzu4-sky-guide {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        }

        .owxzu4-shell-top {
            max-width: var(--owxzu4-shell-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
        }

        .owxzu4-logo {
            flex-shrink: 0;
            margin-right: 32px;
        }

        .owxzu4-logo img {
            height: 32px;
            display: block;
        }

        .owxzu4-steer-list {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 20px;
            min-width: 0;
        }

        .owxzu4-steer-link {
            text-decoration: none;
            color: var(--owxzu4-dark);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s;
            white-space: nowrap;
        }

        .owxzu4-steer-link:hover {
            color: var(--owxzu4-primary);
        }

        .owxzu4-steer-link.active {
            color: var(--owxzu4-primary);
            position: relative;
        }

        .owxzu4-steer-link.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--owxzu4-primary);
        }

        /* 展示区 - Stage */
        .owxzu4-spotlight-arena {
            padding-top: 120px;
            padding-bottom: 80px;
            background: linear-gradient(135deg, #FFF5F5 0%, #FFFFFF 100%);
            overflow: hidden;
        }

        .owxzu4-shell-stage {
            max-width: var(--owxzu4-shell-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .owxzu4-stage-info {
            flex: 1;
            min-width: 320px;
        }

        .owxzu4-stage-visual {
            flex: 1;
            min-width: 320px;
            position: relative;
        }

        .owxzu4-title-main {
            font-size: clamp(2.2rem, 4vw + 1rem, 3.8rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--owxzu4-dark);
            letter-spacing: -0.02em;
        }

        .owxzu4-subtitle-main {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--owxzu4-gray-text);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .owxzu4-activator-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .owxzu4-launcher-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--owxzu4-primary);
            color: var(--owxzu4-white);
            padding: 16px 36px;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: 0 4px 14px rgba(212, 46, 45, 0.3);
        }

        .owxzu4-launcher-primary:hover {
            transform: translateY(-2px);
            background-color: var(--owxzu4-primary-hover);
            box-shadow: 0 6px 20px rgba(212, 46, 45, 0.4);
        }

        .owxzu4-distro-badge {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(0, 0, 0, 0.05);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--owxzu4-primary);
            text-transform: uppercase;
        }

        /* 装饰性视觉元素 */
        .owxzu4-visual-frame {
            background: var(--owxzu4-dark);
            border-radius: 20px;
            aspect-ratio: 16/10;
            width: 100%;
            box-shadow: 0 40px 100px rgba(0,0,0,0.2);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .owxzu4-window-bar {
            height: 30px;
            background: #2D2D2F;
            display: flex;
            align-items: center;
            padding: 0 15px;
            gap: 6px;
        }

        .owxzu4-dot { width: 10px; height: 10px; border-radius: 50%; }
        .owxzu4-dot-red { background: #FF5F56; }
        .owxzu4-dot-yellow { background: #FFBD2E; }
        .owxzu4-dot-green { background: #27C93F; }

        .owxzu4-window-body {
            flex: 1;
            padding: 24px;
            color: #A9B7C6;
            font-family: 'Courier New', Courier, monospace;
            font-size: 14px;
        }

        /* 功能区 - Zone */
        .owxzu4-zone-grid {
            padding: 96px 0;
            background-color: var(--owxzu4-white);
        }

        .owxzu4-shell-grid {
            max-width: var(--owxzu4-shell-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .owxzu4-zone-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .owxzu4-zone-tag {
            color: var(--owxzu4-primary);
            font-weight: 700;
            letter-spacing: 0.1em;
            margin-bottom: 12px;
            display: block;
        }

        .owxzu4-zone-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 700;
        }

        .owxzu4-grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .owxzu4-slab-unit {
            background: var(--owxzu4-light-bg);
            padding: 48px;
            border-radius: 24px;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 20px;
            min-width: 0;
            border: 1px solid transparent;
        }

        .owxzu4-slab-unit:hover {
            background: var(--owxzu4-white);
            border-color: rgba(212, 46, 45, 0.1);
            transform: translateY(-8px);
            box-shadow: var(--owxzu4-shadow);
        }

        .owxzu4-slab-icon {
            font-size: 40px;
            margin-bottom: 8px;
        }

        .owxzu4-slab-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--owxzu4-dark);
        }

        .owxzu4-slab-detail {
            font-size: 16px;
            color: var(--owxzu4-gray-text);
            line-height: 1.7;
        }

        /* 下载规格区 - Specs */
        .owxzu4-zone-download-options {
            padding: 80px 0;
            background: var(--owxzu4-dark);
            color: var(--owxzu4-white);
        }

        .owxzu4-shell-dark {
            max-width: var(--owxzu4-shell-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .owxzu4-download-flow {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: center;
        }

        .owxzu4-piece-download {
            background: rgba(255, 255, 255, 0.05);
            padding: 32px;
            border-radius: 16px;
            flex: 1;
            min-width: 280px;
            max-width: 400px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
        }

        .owxzu4-piece-type {
            font-size: 14px;
            color: var(--owxzu4-primary);
            font-weight: 700;
            margin-bottom: 12px;
        }

        .owxzu4-piece-name {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .owxzu4-piece-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 24px;
        }

        .owxzu4-launcher-outline {
            display: block;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--owxzu4-white);
            padding: 12px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
        }

        .owxzu4-launcher-outline:hover {
            background: var(--owxzu4-white);
            color: var(--owxzu4-dark);
        }

        /* 页脚 - Bedrock */
        .owxzu4-bedrock-anchor {
            padding: 80px 0 40px;
            background: var(--owxzu4-light-bg);
            border-top: 1px solid rgba(0, 0, 0, 0.05);
        }

        .owxzu4-shell-base {
            max-width: var(--owxzu4-shell-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .owxzu4-base-layout {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 64px;
        }

        .owxzu4-base-brand {
            flex: 1.5;
            min-width: 260px;
        }

        .owxzu4-brand-text {
            font-size: 24px;
            font-weight: 800;
            color: var(--owxzu4-dark);
            margin-bottom: 16px;
        }

        .owxzu4-brand-slogan {
            font-size: 15px;
            color: var(--owxzu4-gray-text);
            max-width: 300px;
        }

        .owxzu4-base-nav {
            flex: 3;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 32px;
        }

        .owxzu4-nav-group-title {
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--owxzu4-dark);
        }

        .owxzu4-nav-links {
            list-style: none;
        }

        .owxzu4-nav-item {
            margin-bottom: 12px;
        }

        .owxzu4-nav-item a {
            text-decoration: none;
            color: var(--owxzu4-gray-text);
            font-size: 14px;
            transition: color 0.3s;
        }

        .owxzu4-nav-item a:hover {
            color: var(--owxzu4-primary);
        }

        .owxzu4-copyright-strip {
            padding-top: 32px;
            border-top: 1px solid rgba(0, 0, 0, 0.05);
            text-align: center;
            font-size: 13px;
            color: #999;
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .owxzu4-stage-visual { display: none; }
            .owxzu4-stage-info { text-align: center; }
            .owxzu4-activator-group { justify-content: center; }
            .owxzu4-title-main { font-size: 3rem; }
        }

        @media (max-width: 768px) {
            .owxzu4-shell-top { padding: 12px 24px; }
            .owxzu4-steer-list { display: none; } /* 可在此处添加汉堡菜单逻辑 */
            .owxzu4-grid-container { grid-template-columns: 1fr; }
            .owxzu4-base-layout { flex-direction: column; gap: 40px; }
            .owxzu4-piece-download { max-width: 100%; }
        }