/* CSS reset & variables */
        :root {
            --primary: #7C3AED;
            --primary-dark: #5B21B6;
            --primary-light: #DDD6FE;
            --purple-splendid: linear-gradient(135deg, #7C3AED 0%, #A855F7 50%, #EC4899 100%);
            --dark: #111827;
            --light: #F9FAFB;
            --white: #FFFFFF;
            --gray-text: #4B5563;
            --light-gray: #E5E7EB;
            --border: #F3F4F6;
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            --container-width: 1200px;
        }

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

        body {
            font-family: var(--font);
            color: var(--dark);
            background-color: var(--white);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        ul {
            list-style: none;
        }

        /* Common styles */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        .section-padding {
            padding: 80px 0;
        }

        .section-title-wrapper {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-title-wrapper h2 {
            font-size: 2.2rem;
            color: var(--dark);
            margin-bottom: 15px;
            font-weight: 800;
            position: relative;
            display: inline-block;
        }

        .section-title-wrapper h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: var(--purple-splendid);
            margin: 10px auto 0;
            border-radius: 2px;
        }

        .section-title-wrapper p {
            color: var(--gray-text);
            font-size: 1.1rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
        }

        .btn-primary {
            background: var(--purple-splendid);
            color: var(--white);
            box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: rgba(124, 58, 237, 0.05);
            transform: translateY(-2px);
        }

        /* Header Navigation */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 70px;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            z-index: 1000;
            display: flex;
            align-items: center;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .logo-box {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ai-page-logo {
            height: 40px;
            object-fit: contain;
        }

        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            background: var(--purple-splendid);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-menu {
            display: flex;
            gap: 20px;
        }

        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--dark);
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark);
        }

        /* Hero首屏 - 严格限制：无背景图/无图片 */
        .hero {
            padding-top: 150px;
            padding-bottom: 100px;
            background: radial-gradient(circle at 10% 20%, rgba(124, 58, 237, 0.05) 0%, rgba(236, 72, 153, 0.05) 90.1%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -10%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: rgba(124, 58, 237, 0.15);
            filter: blur(100px);
            border-radius: 50%;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -10%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: rgba(236, 72, 153, 0.12);
            filter: blur(120px);
            border-radius: 50%;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: var(--purple-splendid);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p.subtitle {
            font-size: 1.3rem;
            color: var(--gray-text);
            max-width: 800px;
            margin: 0 auto 35px;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 50px;
            position: relative;
            z-index: 10;
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
            position: relative;
            z-index: 10;
        }

        .stat-card {
            background: var(--white);
            border: 1px solid var(--border);
            padding: 25px 20px;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            transition: transform 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-5px);
        }

        .stat-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--gray-text);
        }

        /* 关于我们与软件介绍 */
        .about-section {
            background-color: var(--light);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .about-text p {
            color: var(--gray-text);
            margin-bottom: 20px;
            font-size: 1rem;
        }

        .features-bullet {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .bullet-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
        }

        .bullet-item svg {
            color: var(--primary);
            flex-shrink: 0;
        }

        .about-badge-card {
            background: var(--purple-splendid);
            color: var(--white);
            padding: 40px;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(124, 58, 237, 0.2);
        }

        .about-badge-card h4 {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        .about-badge-card p {
            opacity: 0.9;
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* 服务能力卡片 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: var(--white);
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 12px;
            transition: all 0.3s ease;
        }

        .service-card:hover {
            box-shadow: 0 10px 30px rgba(124, 58, 237, 0.08);
            border-color: var(--primary-light);
            transform: translateY(-5px);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary);
        }

        .service-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
        }

        .service-card p {
            color: var(--gray-text);
            font-size: 0.95rem;
        }

        .tech-cloud {
            margin-top: 40px;
            background: var(--light);
            padding: 25px;
            border-radius: 12px;
            text-align: center;
        }

        .tech-cloud-title {
            font-weight: 700;
            margin-bottom: 15px;
            font-size: 1.1rem;
        }

        .tags-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .tag-item {
            background: var(--white);
            border: 1px solid var(--light-gray);
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            color: var(--dark);
            transition: all 0.2s ease;
        }

        .tag-item:hover {
            background: var(--primary);
            color: var(--white);
            border-color: var(--primary);
        }

        /* 流程步骤 */
        .workflow-section {
            background: var(--light);
        }

        .workflow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: var(--white);
            padding: 30px 20px;
            border-radius: 12px;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--purple-splendid);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 20px;
        }

        .step-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 0.9rem;
            color: var(--gray-text);
        }

        /* 对比评测 */
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
            align-items: stretch;
        }

        .rating-box {
            background: var(--purple-splendid);
            color: var(--white);
            padding: 40px;
            border-radius: 16px;
            text-align: center;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }

        .score-val {
            font-size: 4.5rem;
            font-weight: 900;
            line-height: 1;
            margin: 15px 0;
        }

        .score-stars {
            font-size: 1.5rem;
            color: #FBBF24;
            margin-bottom: 10px;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
        }

        table.comp-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            background: var(--white);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
        }

        table.comp-table th, table.comp-table td {
            padding: 15px 20px;
            border-bottom: 1px solid var(--border);
            font-size: 0.95rem;
        }

        table.comp-table th {
            background: #F3F4F6;
            font-weight: 700;
        }

        table.comp-table tr:hover {
            background: var(--light);
        }

        .highlight-cell {
            color: var(--primary);
            font-weight: 700;
        }

        /* 案例展示区 */
        .cases-section {
            background: var(--light);
        }

        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-bottom: 40px;
        }

        .case-card {
            background: var(--white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            transition: all 0.3s ease;
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
        }

        .case-img-wrap {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: #EEE;
        }

        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-info {
            padding: 20px;
        }

        .case-info h4 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }

        .case-info p {
            color: var(--gray-text);
            font-size: 0.9rem;
        }

        .material-showcase {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 20px;
            margin-top: 40px;
        }

        .mat-big-card {
            background: var(--white);
            border-radius: 12px;
            padding: 25px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .mat-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .mat-item img {
            width: 100%;
            border-radius: 8px;
            object-fit: cover;
            height: 150px;
        }

        /* 客户评论 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .review-card {
            background: var(--white);
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
        }

        .review-header {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        .review-avatar-fallback {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .review-user-info h4 {
            font-size: 1rem;
            margin-bottom: 2px;
        }

        .review-user-info span {
            font-size: 0.8rem;
            color: var(--gray-text);
        }

        .review-content {
            font-size: 0.95rem;
            color: var(--gray-text);
            line-height: 1.6;
        }

        /* 价格与Token比价 */
        .pricing-section {
            background: var(--light);
        }

        .price-table-wrapper {
            background: var(--white);
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
        }

        /* 职业与人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
        }

        .train-card {
            background: var(--white);
            border: 1px solid var(--border);
            padding: 25px 15px;
            border-radius: 10px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .train-card:hover {
            border-color: var(--primary);
            transform: scale(1.02);
        }

        .train-icon {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .train-card h4 {
            font-size: 1rem;
            margin-bottom: 8px;
        }

        .train-card p {
            font-size: 0.8rem;
            color: var(--gray-text);
        }

        /* FAQ折叠面板 */
        .faq-section {
            background: var(--light);
        }

        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

        .faq-question {
            padding: 20px;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
        }

        .faq-question svg {
            transition: transform 0.3s ease;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 20px;
            color: var(--gray-text);
            font-size: 0.95rem;
        }

        .faq-item.active .faq-answer {
            padding-bottom: 20px;
        }

        .faq-item.active .faq-question svg {
            transform: rotate(180deg);
        }

        /* 自助排查与术语百科 */
        .trouble-glossary-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-top: 40px;
        }

        .info-box-card {
            background: var(--white);
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 12px;
        }

        .info-box-card h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: var(--primary-dark);
        }

        .item-list-faq {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .item-list-faq li {
            border-bottom: 1px dashed var(--light-gray);
            padding-bottom: 10px;
        }

        .item-list-faq strong {
            display: block;
            margin-bottom: 4px;
            font-size: 0.95rem;
        }

        .item-list-faq span {
            font-size: 0.85rem;
            color: var(--gray-text);
        }

        /* 知识库/行业资讯 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .news-card {
            background: var(--white);
            border: 1px solid var(--border);
            padding: 25px;
            border-radius: 10px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-card h4 {
            font-size: 1.1rem;
            margin-bottom: 15px;
        }

        .news-card p {
            font-size: 0.85rem;
            color: var(--gray-text);
            margin-bottom: 20px;
        }

        /* 联系我们与表单 */
        .contact-section {
            background: linear-gradient(180deg, var(--white) 0%, var(--light) 100%);
        }

        .contact-wrapper {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 50px;
        }

        .contact-form-box {
            background: var(--white);
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            border: 1px solid var(--border);
        }

        .form-title {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 25px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 6px;
            font-size: 0.9rem;
            font-weight: 500;
        }

        .form-group input, .form-group select, .form-group textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--light-gray);
            border-radius: 6px;
            font-family: inherit;
            outline: none;
            transition: border 0.3s ease;
        }

        .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
            border-color: var(--primary);
        }

        .contact-info-box {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-details {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .contact-detail-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }

        .contact-detail-icon {
            width: 40px;
            height: 40px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }

        .contact-detail-text h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }

        .contact-detail-text p {
            color: var(--gray-text);
            font-size: 0.9rem;
        }

        .qrcode-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 15px;
            margin-top: 30px;
        }

        .qrcode-item {
            text-align: center;
            background: var(--white);
            border: 1px solid var(--border);
            padding: 15px 10px;
            border-radius: 10px;
        }

        .qrcode-item img {
            width: 100%;
            max-width: 100px;
            height: auto;
            margin-bottom: 8px;
        }

        .qrcode-item span {
            font-size: 0.8rem;
            font-weight: 500;
            display: block;
        }

        /* Footer */
        footer {
            background-color: #110B1C;
            color: rgba(255,255,255,0.7);
            padding: 60px 0 20px;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 40px;
        }

        .footer-logo-desc h3 {
            color: var(--white);
            font-size: 1.4rem;
            margin-bottom: 15px;
        }

        .footer-logo-desc p {
            line-height: 1.8;
            max-width: 400px;
        }

        .footer-links h4 {
            color: var(--white);
            font-size: 1.05rem;
            margin-bottom: 20px;
        }

        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a:hover {
            color: var(--white);
            padding-left: 5px;
        }

        .footer-bottom {
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friend-links a {
            color: rgba(255,255,255,0.5);
            font-size: 0.85rem;
        }

        .friend-links a:hover {
            color: var(--white);
        }

        /* 悬浮组件 */
        .floating-widget {
            position: fixed;
            bottom: 30px;
            right: 30px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 999;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--white);
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
            position: relative;
        }

        .float-btn:hover {
            transform: scale(1.1);
            background: var(--primary);
            color: var(--white);
        }

        .float-btn svg {
            width: 24px;
            height: 24px;
        }

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: var(--white);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 10px 35px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 140px;
        }

        .qr-popover img {
            width: 110px;
            height: 110px;
            margin-bottom: 5px;
        }

        .qr-popover span {
            font-size: 0.8rem;
            color: var(--dark);
        }

        .float-btn:hover .qr-popover {
            display: block;
        }

        /* Responsive designs */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .workflow-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .comparison-grid {
                grid-template-columns: 1fr;
            }
            .cases-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: var(--white);
                padding: 20px;
                box-shadow: 0 4px 15px rgba(0,0,0,0.05);
                border-top: 1px solid var(--border);
            }
            .nav-menu.active {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .about-grid {
                grid-template-columns: 1fr;
            }
            .material-showcase {
                grid-template-columns: 1fr;
            }
            .trouble-glossary-grid {
                grid-template-columns: 1fr;
            }
            .contact-wrapper {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .training-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .services-grid {
                grid-template-columns: 1fr;
            }
            .workflow-steps {
                grid-template-columns: 1fr;
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .reviews-grid {
                grid-template-columns: 1fr;
            }
            .training-grid {
                grid-template-columns: 1fr;
            }
        }