/* 根变量及明艳撞色风格设定 */
        :root {
            --primary: #1E40AF;       /* 科技深蓝 */
            --secondary: #FACC15;     /* 明艳柠檬黄 */
            --accent: #FF5A1F;        /* 亮丽活力橙 */
            --dark: #0F172A;          /* 极深灰 */
            --light: #F8FAFC;         /* 浅灰白底色 */
            --white: #FFFFFF;
            --border-radius: 12px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        /* 基础重置 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

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

        /* 标题模块风格 */
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            color: var(--primary);
            position: relative;
            display: inline-block;
            padding-bottom: 12px;
            font-weight: 800;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--accent);
            border-radius: 2px;
        }

        .section-header p {
            margin-top: 15px;
            color: #64748B;
            font-size: 1.1rem;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
        }

        .btn-primary {
            background-color: var(--accent);
            color: var(--white);
        }

        .btn-primary:hover {
            background-color: var(--white);
            color: var(--accent);
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(255, 90, 31, 0.3);
        }

        .btn-secondary {
            background-color: var(--secondary);
            color: var(--dark);
        }

        .btn-secondary:hover {
            background-color: var(--dark);
            color: var(--secondary);
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(250, 204, 21, 0.3);
        }

        /* 导航栏 */
        header {
            background-color: var(--white);
            border-bottom: 3px solid var(--primary);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 80px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .ai-page-logo {
            height: 45px;
            object-fit: contain;
        }

        .nav-menu {
            display: flex;
            gap: 20px;
            align-items: center;
            list-style: none;
        }

        .nav-menu a {
            font-weight: 600;
            color: var(--dark);
            padding: 8px 12px;
            border-radius: 6px;
        }

        .nav-menu a:hover {
            color: var(--primary);
            background-color: rgba(30, 64, 175, 0.05);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary);
            cursor: pointer;
        }

        /* 首屏 Hero 区域 (无图片) */
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, #1e3a8a 50%, var(--dark) 100%);
            color: var(--white);
            padding: 100px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 300px;
            height: 300px;
            background-color: var(--secondary);
            border-radius: 50%;
            filter: blur(100px);
            opacity: 0.15;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -10%;
            right: -10%;
            width: 400px;
            height: 400px;
            background-color: var(--accent);
            border-radius: 50%;
            filter: blur(120px);
            opacity: 0.15;
            pointer-events: none;
        }

        .hero-badge {
            display: inline-block;
            background-color: var(--accent);
            color: var(--white);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 25px;
            text-transform: uppercase;
            letter-spacing: 1px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2);
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 25px;
            color: var(--white);
        }

        .hero h1 span {
            color: var(--secondary);
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 1.25rem;
            max-width: 800px;
            margin: 0 auto 40px auto;
            color: #93C5FD;
            font-weight: 300;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        /* 数据指标卡片 */
        .stats-bar {
            background-color: var(--white);
            border-top: 5px solid var(--secondary);
            margin-top: -50px;
            position: relative;
            z-index: 10;
            border-radius: var(--border-radius);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            padding: 30px 20px;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }

        .stat-item h3 {
            font-size: 2rem;
            color: var(--primary);
            font-weight: 800;
            margin-bottom: 5px;
        }

        .stat-item p {
            color: #64748B;
            font-size: 0.95rem;
            font-weight: 600;
        }

        /* 平台介绍 */
        .about-section {
            background-color: var(--white);
        }

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

        .about-content h3 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 20px;
            font-weight: 800;
        }

        .about-content p {
            color: #475569;
            margin-bottom: 15px;
            font-size: 1.05rem;
        }

        .about-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 25px;
        }

        .about-tags span {
            background-color: var(--light);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: 4px;
            font-weight: 600;
            border-left: 3px solid var(--accent);
        }

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

        .service-card {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 35px 25px;
            border-top: 4px solid var(--primary);
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.1);
            border-top-color: var(--accent);
        }

        .service-icon {
            width: 60px;
            height: 60px;
            background-color: rgba(30, 64, 175, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary);
            font-size: 1.8rem;
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .service-card p {
            color: #64748B;
            font-size: 0.95rem;
        }

        /* 流程步骤 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 30px 20px;
            text-align: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            position: relative;
            border: 2px solid transparent;
        }

        .step-card:hover {
            border-color: var(--secondary);
        }

        .step-num {
            width: 40px;
            height: 40px;
            background-color: var(--accent);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            margin: 0 auto 20px auto;
        }

        .step-card h4 {
            margin-bottom: 10px;
            color: var(--primary);
        }

        .step-card p {
            color: #64748B;
            font-size: 0.9rem;
        }

        /* 解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .solution-card {
            background-color: var(--white);
            border: 2px solid #E2E8F0;
            border-radius: var(--border-radius);
            padding: 30px;
            transition: var(--transition);
        }

        .solution-card:hover {
            border-color: var(--primary);
            background-color: rgba(30, 64, 175, 0.02);
        }

        .solution-card h3 {
            color: var(--primary);
            margin-bottom: 15px;
            font-size: 1.25rem;
        }

        .solution-card ul {
            list-style: none;
        }

        .solution-card ul li {
            position: relative;
            padding-left: 20px;
            margin-bottom: 10px;
            color: #475569;
            font-size: 0.95rem;
        }

        .solution-card ul li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--accent);
            font-weight: 800;
        }

        /* 服务网络与标准化流程 */
        .network-section {
            background-color: var(--white);
        }

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

        .map-mockup {
            background-color: var(--light);
            border: 4px solid var(--primary);
            border-radius: var(--border-radius);
            padding: 40px;
            text-align: center;
            font-weight: bold;
            color: var(--primary);
        }

        .standard-timeline {
            margin-top: 40px;
            border-left: 4px solid var(--accent);
            padding-left: 20px;
        }

        .timeline-item {
            margin-bottom: 30px;
            position: relative;
        }

        .timeline-item::before {
            content: '';
            width: 16px;
            height: 16px;
            background-color: var(--secondary);
            border: 4px solid var(--white);
            border-radius: 50%;
            position: absolute;
            left: -30px;
            top: 5px;
            box-shadow: 0 0 0 4px var(--accent);
        }

        .timeline-item h4 {
            color: var(--dark);
            margin-bottom: 5px;
        }

        /* 案例中心 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background-color: var(--white);
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }

        .case-img-container {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

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

        .case-tag {
            position: absolute;
            top: 15px;
            left: 15px;
            background-color: var(--accent);
            color: var(--white);
            padding: 4px 10px;
            font-size: 0.8rem;
            font-weight: 700;
            border-radius: 4px;
        }

        .case-info {
            padding: 25px;
        }

        .case-info h4 {
            font-size: 1.15rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .case-info p {
            color: #64748B;
            font-size: 0.9rem;
            margin-bottom: 15px;
        }

        .case-metric {
            display: inline-block;
            background-color: rgba(250, 204, 21, 0.15);
            color: #B45309;
            padding: 4px 10px;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: 4px;
        }

        /* 对比评测表格 */
        .comparison-table-wrapper {
            background-color: var(--white);
            border-radius: var(--border-radius);
            overflow-x: auto;
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
            border-top: 5px solid var(--accent);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

        th, td {
            padding: 18px 24px;
            border-bottom: 1px solid #E2E8F0;
        }

        th {
            background-color: var(--light);
            color: var(--dark);
            font-weight: 700;
        }

        tr:last-child td {
            border-bottom: none;
        }

        .highlight-col {
            background-color: rgba(250, 204, 21, 0.05);
            font-weight: bold;
        }

        .rating-box {
            background-color: var(--secondary);
            color: var(--dark);
            padding: 20px;
            border-radius: var(--border-radius);
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 30px;
            border-left: 6px solid var(--accent);
        }

        .rating-stars {
            color: var(--accent);
            font-size: 1.5rem;
        }

        /* 需求匹配与价格参考 */
        .match-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .token-card {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            border-left: 4px solid var(--primary);
        }

        .token-row {
            display: flex;
            justify-content: space-between;
            padding: 12px 0;
            border-bottom: 1px dashed #E2E8F0;
        }

        .token-row:last-child {
            border-bottom: none;
        }

        /* 培训板块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .training-card {
            background: var(--white);
            border-radius: var(--border-radius);
            border-bottom: 4px solid var(--secondary);
            padding: 30px;
            text-align: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
        }

        .training-card h3 {
            color: var(--primary);
            margin-bottom: 15px;
        }

        /* 帮助中心与 FAQ 折叠面板 */
        .faq-wrapper {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--white);
            border-radius: 8px;
            margin-bottom: 15px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
            overflow: hidden;
            border: 1px solid #E2E8F0;
        }

        .faq-question {
            padding: 20px 25px;
            font-weight: 700;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
            background-color: var(--white);
        }

        .faq-question:hover {
            background-color: rgba(30, 64, 175, 0.02);
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--accent);
            transition: var(--transition);
        }

        .faq-item.active .faq-question::after {
            content: '−';
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: var(--light);
        }

        .faq-answer-inner {
            padding: 20px 25px;
            color: #475569;
            border-top: 1px solid #E2E8F0;
        }

        /* 百科词条与自助排查 */
        .wiki-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .wiki-card {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
        }

        .wiki-card h4 {
            color: var(--accent);
            margin-bottom: 10px;
        }

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

        .review-card {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            position: relative;
            border-left: 4px solid var(--accent);
        }

        .review-card::before {
            content: '“';
            font-size: 4rem;
            color: rgba(255, 90, 31, 0.1);
            position: absolute;
            top: 10px;
            left: 15px;
            line-height: 1;
        }

        .review-content {
            position: relative;
            z-index: 2;
            color: #475569;
            font-style: italic;
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .author-info h4 {
            color: var(--dark);
            font-size: 0.95rem;
        }

        .author-info p {
            color: #94A3B8;
            font-size: 0.8rem;
        }

        /* 行业资讯 / 知识库 */
        .articles-list {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
        }

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

        .article-link-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            border-bottom: 1px solid #F1F5F9;
        }

        .article-link-item:last-child {
            border-bottom: none;
        }

        .article-title {
            font-weight: 600;
            color: var(--dark);
        }

        .article-title:hover {
            color: var(--primary);
        }

        /* 联系我们 & 表单 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

        .contact-info {
            background-color: var(--primary);
            color: var(--white);
            padding: 40px;
            border-radius: var(--border-radius);
            position: relative;
            overflow: hidden;
        }

        .contact-info h3 {
            font-size: 1.8rem;
            margin-bottom: 25px;
            color: var(--secondary);
        }

        .contact-detail {
            margin-bottom: 20px;
        }

        .contact-detail p {
            margin-bottom: 8px;
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 30px;
        }

        .qr-item {
            text-align: center;
            background-color: var(--white);
            padding: 10px;
            border-radius: 8px;
            color: var(--dark);
            width: 140px;
        }

        .qr-item img {
            width: 120px;
            height: 120px;
            margin-bottom: 8px;
        }

        .qr-item span {
            font-size: 0.8rem;
            font-weight: 700;
        }

        .contact-form-wrapper {
            background-color: var(--white);
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
            border-top: 5px solid var(--primary);
        }

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

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        label {
            display: block;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
        }

        input, select, textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid #E2E8F0;
            border-radius: 6px;
            outline: none;
            transition: var(--transition);
            background-color: var(--light);
        }

        input:focus, select:focus, textarea:focus {
            border-color: var(--primary);
            background-color: var(--white);
        }

        /* 浮动客服 */
        .floating-kefu {
            position: fixed;
            bottom: 40px;
            right: 40px;
            background-color: var(--accent);
            color: var(--white);
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
            cursor: pointer;
            z-index: 999;
            transition: var(--transition);
        }

        .floating-kefu:hover {
            transform: scale(1.1);
        }

        .kefu-qr-popup {
            position: absolute;
            bottom: 75px;
            right: 0;
            background-color: var(--white);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 25px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            border: 2px solid var(--accent);
            width: 180px;
        }

        .kefu-qr-popup img {
            width: 150px;
            height: 150px;
            margin-bottom: 10px;
        }

        .kefu-qr-popup span {
            color: var(--dark);
            font-size: 0.85rem;
            font-weight: 700;
        }

        .floating-kefu:hover .kefu-qr-popup {
            display: block;
        }

        /* 页脚 */
        footer {
            background-color: var(--dark);
            color: #94A3B8;
            padding: 60px 0 20px 0;
            border-top: 5px solid var(--secondary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 50px;
            margin-bottom: 40px;
        }

        .footer-brand h4 {
            color: var(--white);
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .footer-brand p {
            margin-bottom: 15px;
            line-height: 1.8;
        }

        .footer-links h5 {
            color: var(--white);
            font-size: 1.1rem;
            margin-bottom: 20px;
            position: relative;
        }

        .footer-links h5::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 30px;
            height: 2px;
            background-color: var(--secondary);
        }

        .footer-links ul {
            list-style: none;
        }

        .footer-links ul li {
            margin-bottom: 12px;
        }

        .footer-links ul li a:hover {
            color: var(--secondary);
        }

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
        }

        .friend-links {
            margin-top: 15px;
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }

        .friend-links a {
            color: #64748B;
        }

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

        /* 移动端菜单激活样式 */
        .nav-menu.active {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: 80px;
            left: 0;
            right: 0;
            background-color: var(--white);
            border-bottom: 3px solid var(--primary);
            padding: 20px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .services-grid, .cases-grid, .training-grid, .reviews-grid, .wiki-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .about-grid, .network-grid, .match-grid, .contact-grid, .footer-grid {
                grid-template-columns: 1fr;
            }
            .services-grid, .cases-grid, .training-grid, .reviews-grid, .wiki-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2rem;
            }
        }