:root {
            --hwo3t-primary: #ff502c;
            --hwo3t-primary-hover: #e64525;
            --hwo3t-dark: #1d1d1f;
            --hwo3t-grey: #f5f5f7;
            --hwo3t-text-main: #333333;
            --hwo3t-text-sub: #666666;
            --hwo3t-white: #ffffff;
            --hwo3t-spacing-unit: 8px;
            --hwo3t-max-width: 1300px;
            --hwo3t-radius: 16px;
            --hwo3t-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

        * {
            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(--hwo3t-text-main);
            line-height: 1.6;
            background-color: #fff;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        ul {
            list-style: none;
        }

        /* 导航栏 */
        .hwo3t-header {
            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);
        }

        .hwo3t-nav-container {
            max-width: var(--hwo3t-max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .hwo3t-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
        }

        .hwo3t-logo img {
            height: 32px;
            width: auto;
        }

        .hwo3t-menu {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            min-width: 0;
        }

        .hwo3t-menu-item {
            font-size: 15px;
            font-weight: 500;
            color: var(--hwo3t-text-main);
            position: relative;
            padding: 8px 0;
        }

        .hwo3t-menu-item:hover {
            color: var(--hwo3t-primary);
        }

        .hwo3t-menu-item.hwo3t-active {
            color: var(--hwo3t-primary);
        }

        .hwo3t-menu-item.hwo3t-active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--hwo3t-primary);
            border-radius: 2px;
        }

        /* Hero 区块 */
        .hwo3t-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: radial-gradient(circle at 90% 10%, rgba(255, 80, 44, 0.05) 0%, rgba(255, 255, 255, 1) 50%);
            text-align: center;
            overflow: hidden;
        }

        .hwo3t-hero-content {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .hwo3t-hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 80, 44, 0.1);
            color: var(--hwo3t-primary);
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .hwo3t-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            font-weight: 800;
            color: var(--hwo3t-dark);
            margin-bottom: 24px;
            word-break: keep-all;
        }

        .hwo3t-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--hwo3t-text-sub);
            max-width: 700px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        .hwo3t-search-box {
            max-width: 600px;
            margin: 0 auto;
            position: relative;
            background: var(--hwo3t-white);
            padding: 8px;
            border-radius: 100px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            display: flex;
            align-items: center;
        }

        .hwo3t-search-input {
            flex: 1;
            border: none;
            padding: 12px 24px;
            font-size: 16px;
            outline: none;
            background: transparent;
            min-width: 0;
        }

        .hwo3t-search-btn {
            background: var(--hwo3t-primary);
            color: white;
            border: none;
            padding: 12px 32px;
            border-radius: 100px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
        }

        .hwo3t-search-btn:hover {
            background: var(--hwo3t-primary-hover);
        }

        /* 核心功能：场景化智能方案 */
        .hwo3t-scenarios {
            padding: 96px 24px;
            max-width: var(--hwo3t-max-width);
            margin: 0 auto;
        }

        .hwo3t-section-header {
            margin-bottom: 64px;
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            flex-wrap: wrap;
            gap: 24px;
        }

        .hwo3t-section-title {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            font-weight: 700;
            max-width: 500px;
            line-height: 1.2;
        }

        .hwo3t-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .hwo3t-card {
            background: var(--hwo3t-grey);
            border-radius: var(--hwo3t-radius);
            padding: 48px;
            transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-width: 0;
        }

        .hwo3t-card:hover {
            transform: translateY(-8px);
            background: var(--hwo3t-white);
            box-shadow: var(--hwo3t-shadow);
        }

        .hwo3t-card-type {
            font-size: 14px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--hwo3t-primary);
            margin-bottom: 16px;
        }

        .hwo3t-card-title {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 24px;
        }

        .hwo3t-capability-list {
            margin-bottom: 32px;
        }

        .hwo3t-capability-item {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
            font-size: 15px;
            color: var(--hwo3t-text-sub);
        }

        .hwo3t-capability-item::before {
            content: '';
            width: 6px;
            height: 6px;
            background: var(--hwo3t-primary);
            border-radius: 50%;
            flex-shrink: 0;
        }

        .hwo3t-card-link {
            font-weight: 600;
            color: var(--hwo3t-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hwo3t-card-link:hover {
            color: var(--hwo3t-primary);
        }

        /* 词库动态分类区 */
        .hwo3t-dynamic-section {
            padding: 96px 24px;
            background: var(--hwo3t-dark);
            color: var(--hwo3t-white);
        }

        .hwo3t-dynamic-container {
            max-width: var(--hwo3t-max-width);
            margin: 0 auto;
        }

        .hwo3t-category-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 48px;
        }

        .hwo3t-cat-tag {
            padding: 12px 24px;
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: 100px;
            cursor: pointer;
            transition: all 0.3s;
        }

        .hwo3t-cat-tag:hover {
            border-color: var(--hwo3t-primary);
            background: var(--hwo3t-primary);
        }

        /* 页脚 */
        .hwo3t-footer {
            padding: 80px 24px 40px;
            background: #fff;
            border-top: 1px solid #eee;
        }

        .hwo3t-footer-content {
            max-width: var(--hwo3t-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .hwo3t-footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .hwo3t-footer-brand-name {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--hwo3t-primary);
        }

        .hwo3t-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            flex: 2;
            min-width: 300px;
        }

        .hwo3t-footer-group-title {
            font-weight: 700;
            margin-bottom: 24px;
            font-size: 14px;
            color: #999;
            text-transform: uppercase;
        }

        .hwo3t-footer-link-item {
            margin-bottom: 12px;
            font-size: 14px;
            color: var(--hwo3t-text-sub);
        }

        .hwo3t-footer-link-item a:hover {
            color: var(--hwo3t-primary);
        }

        .hwo3t-copyright {
            max-width: var(--hwo3t-max-width);
            margin: 64px auto 0;
            padding-top: 24px;
            border-top: 1px solid #f0f0f0;
            font-size: 13px;
            color: #999;
            text-align: center;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .hwo3t-nav-container {
                height: auto;
                padding: 16px;
            }
            .hwo3t-menu {
                display: none; /* 简化演示，移动端通常使用汉堡菜单 */
            }
            .hwo3t-hero {
                padding-top: 120px;
                padding-bottom: 64px;
            }
            .hwo3t-section-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .hwo3t-grid {
                grid-template-columns: 1fr;
            }
            .hwo3t-card {
                padding: 32px;
            }
        }