:root {
            --hwo3t-primary: #ff6600;
            --hwo3t-primary-dark: #e65c00;
            --hwo3t-secondary: #4a90e2;
            --hwo3t-bg-light: #f8f9fa;
            --hwo3t-text-main: #222222;
            --hwo3t-text-muted: #666666;
            --hwo3t-white: #ffffff;
            --hwo3t-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --hwo3t-radius: 16px;
            --hwo3t-container-width: 1100px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--hwo3t-text-main);
            background-color: var(--hwo3t-white);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏设计 */
        .hwo3t-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: 12px 0;
            transition: all 0.3s ease;
        }

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

        .hwo3t-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .hwo3t-logo img {
            height: 32px;
            display: block;
        }

        .hwo3t-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .hwo3t-nav-menu a {
            text-decoration: none;
            color: var(--hwo3t-text-main);
            font-weight: 500;
            font-size: 15px;
            transition: color 0.3s ease;
            position: relative;
        }

        .hwo3t-nav-menu a:hover, .hwo3t-nav-menu a.hwo3t-active {
            color: var(--hwo3t-primary);
        }

        .hwo3t-nav-menu a.hwo3t-active::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--hwo3t-primary);
        }

        /* Hero 视觉区 - 独特对角线分割设计 */
        .hwo3t-hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background: linear-gradient(135deg, #fffcf9 0%, #fff0e6 100%);
            position: relative;
            overflow: hidden;
        }

        .hwo3t-hero::before {
            content: '∑ α Ω √ ∞';
            position: absolute;
            right: -5%;
            top: 10%;
            font-size: 15rem;
            color: rgba(255, 102, 0, 0.03);
            font-weight: 900;
            transform: rotate(-15deg);
            pointer-events: none;
        }

        .hwo3t-hero-content {
            max-width: var(--hwo3t-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .hwo3t-hero-text {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .hwo3t-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 24px;
            color: #1a1a1a;
        }

        .hwo3t-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            color: var(--hwo3t-text-muted);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .hwo3t-hero-btn {
            display: inline-flex;
            align-items: center;
            padding: 16px 40px;
            background: var(--hwo3t-primary);
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            font-size: 18px;
            box-shadow: 0 10px 20px rgba(255, 102, 0, 0.2);
            transition: all 0.3s ease;
        }

        .hwo3t-hero-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(255, 102, 0, 0.3);
            background: var(--hwo3t-primary-dark);
        }

        .hwo3t-symbol-wall {
            flex: 1;
            min-width: 320px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .hwo3t-symbol-card {
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(5px);
            padding: 24px;
            border-radius: var(--hwo3t-radius);
            text-align: center;
            border: 1px solid rgba(255, 102, 0, 0.1);
            transition: all 0.3s ease;
        }

        .hwo3t-symbol-card:hover {
            border-color: var(--hwo3t-primary);
            transform: scale(1.05);
        }

        .hwo3t-symbol-card span {
            font-size: 32px;
            display: block;
            margin-bottom: 8px;
        }

        /* 智慧方案区块 */
        .hwo3t-solutions {
            padding: 96px 0;
            max-width: var(--hwo3t-container-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .hwo3t-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .hwo3t-section-header h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

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

        .hwo3t-solution-item {
            background: var(--hwo3t-bg-light);
            padding: 40px;
            border-radius: var(--hwo3t-radius);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .hwo3t-solution-item:hover {
            background: var(--hwo3t-white);
            box-shadow: var(--hwo3t-shadow);
        }

        .hwo3t-solution-type {
            font-size: 20px;
            font-weight: 700;
            color: var(--hwo3t-primary);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
        }

        .hwo3t-capabilities {
            list-style: none;
        }

        .hwo3t-capabilities li {
            margin-bottom: 12px;
            padding-left: 24px;
            position: relative;
            color: var(--hwo3t-text-muted);
            word-break: break-word;
        }

        .hwo3t-capabilities li::before {
            content: '•';
            position: absolute;
            left: 0;
            color: var(--hwo3t-primary);
            font-weight: bold;
        }

        /* 动态内容区 - 特殊符号速查 */
        .hwo3t-dynamic-section {
            padding: 96px 0;
            background: #1a1a1a;
            color: white;
        }

        .hwo3t-dynamic-container {
            max-width: var(--hwo3t-container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .hwo3t-symbol-category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 24px;
            margin-top: 48px;
        }

        .hwo3t-category-box {
            border: 1px solid rgba(255,255,255,0.1);
            padding: 24px;
            border-radius: 12px;
            transition: border 0.3s;
        }

        .hwo3t-category-box:hover {
            border-color: var(--hwo3t-primary);
        }

        .hwo3t-category-box h3 {
            margin-bottom: 16px;
            font-size: 18px;
            color: var(--hwo3t-primary);
        }

        .hwo3t-symbol-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 20px;
        }

        /* 页脚 */
        .hwo3t-footer {
            padding: 64px 0 32px;
            background: #fafafa;
            border-top: 1px solid #eee;
        }

        .hwo3t-footer-content {
            max-width: var(--hwo3t-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
        }

        .hwo3t-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .hwo3t-brand-name {
            font-size: 24px;
            font-weight: 800;
            color: var(--hwo3t-primary);
            margin-bottom: 16px;
        }

        .hwo3t-footer-links {
            flex: 2;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 24px;
            min-width: 0;
        }

        .hwo3t-footer-group h4 {
            margin-bottom: 20px;
            font-size: 16px;
        }

        .hwo3t-footer-group ul {
            list-style: none;
        }

        .hwo3t-footer-group li {
            margin-bottom: 10px;
        }

        .hwo3t-footer-group a {
            text-decoration: none;
            color: var(--hwo3t-text-muted);
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .hwo3t-copyright {
            width: 100%;
            text-align: center;
            padding-top: 48px;
            margin-top: 48px;
            border-top: 1px solid #eee;
            font-size: 13px;
            color: #999;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .hwo3t-nav-menu {
                display: none; /* 简化移动端，实际应有汉堡菜单 */
            }
            .hwo3t-hero {
                padding-top: 100px;
                text-align: center;
            }
            .hwo3t-hero-content {
                flex-direction: column;
            }
            .hwo3t-hero-text {
                min-width: 100%;
            }
            .hwo3t-hero-subtitle {
                margin: 0 auto 32px;
            }
            .hwo3t-symbol-wall {
                min-width: 100%;
                grid-template-columns: repeat(2, 1fr);
            }
        }