:root {
            --primary-color: #FFD300; /* 鲜黄耀眼风主色 */
            --primary-hover: #E6BD00;
            --dark-color: #111111;
            --light-bg: #FAFAFA;
            --card-bg: #FFFFFF;
            --text-main: #222222;
            --text-muted: #666666;
            --border-color: #EEEEEE;
            --accent-yellow: #FFF8D6;
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--light-bg);
            color: var(--text-main);
            line-height: 1.6;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

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

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

        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .logo-area img {
            height: 48px;
            width: auto;
        }

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

        .nav-menu a {
            color: var(--text-main);
            text-decoration: none;
            font-weight: 600;
            font-size: 14px;
            padding: 8px 12px;
            border-radius: 4px;
            transition: var(--transition);
        }

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

        .nav-btn {
            background-color: var(--dark-color);
            color: var(--primary-color) !important;
            border: 2px solid var(--primary-color);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: none;
        }

        .nav-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--dark-color);
            transition: var(--transition);
        }

        /* Hero首屏 - 严禁出现图片 */
        .hero-section {
            background: linear-gradient(135deg, var(--dark-color) 0%, #222222 100%);
            color: #FFFFFF;
            padding: 100px 0 80px 0;
            position: relative;
            overflow: hidden;
            border-bottom: 8px solid var(--primary-color);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255,211,0,0.15) 0%, rgba(255,211,0,0) 70%);
            pointer-events: none;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .hero-tag {
            display: inline-block;
            background-color: var(--primary-color);
            color: var(--dark-color);
            padding: 6px 16px;
            font-weight: 700;
            font-size: 14px;
            border-radius: 50px;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
            box-shadow: 0 4px 14px rgba(255,211,0,0.4);
        }

        .hero-title h1 {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 24px;
            color: #FFFFFF;
        }

        .hero-title h1 span {
            color: var(--primary-color);
        }

        .hero-desc {
            font-size: 18px;
            color: #CCCCCC;
            margin-bottom: 40px;
            line-height: 1.8;
        }

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

        .btn {
            display: inline-block;
            padding: 15px 35px;
            font-size: 16px;
            font-weight: 700;
            border-radius: 4px;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            text-align: center;
            border: none;
        }

        .btn-primary {
            background-color: var(--primary-color);
            color: var(--dark-color);
            box-shadow: 0 8px 20px rgba(255,211,0,0.3);
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background-color: transparent;
            color: #FFFFFF;
            border: 2px solid rgba(255,255,255,0.2);
        }

        .btn-secondary:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
            transform: translateY(-2px);
        }

        /* 数据指标卡片 */
        .stats-section {
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

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

        .stat-card {
            background-color: var(--card-bg);
            border-radius: 8px;
            padding: 30px 20px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            border-top: 4px solid var(--primary-color);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(255,211,0,0.15);
        }

        .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--dark-color);
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 通用区块样式 */
        section {
            padding: 90px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-title-wrap {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--dark-color);
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--primary-color);
        }

        .section-subtitle {
            margin-top: 15px;
            color: var(--text-muted);
            font-size: 16px;
        }

        /* 关于我们与平台介绍 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 24px;
            margin-bottom: 20px;
            color: var(--dark-color);
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 15px;
            line-height: 1.8;
        }

        .feature-bullets {
            list-style: none;
            margin-bottom: 30px;
        }

        .feature-bullets li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-weight: 600;
            color: var(--dark-color);
        }

        .feature-bullets li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--dark-color);
            background-color: var(--primary-color);
            width: 20px;
            height: 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: bold;
        }

        .about-image {
            background-color: var(--accent-yellow);
            border: 4px solid var(--dark-color);
            border-radius: 12px;
            padding: 20px;
            box-shadow: 8px 8px 0px var(--dark-color);
        }

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

        .service-card {
            background-color: var(--card-bg);
            border: 2px solid var(--border-color);
            border-radius: 8px;
            padding: 40px 30px;
            transition: var(--transition);
        }

        .service-card:hover {
            border-color: var(--primary-color);
            box-shadow: 0 10px 25px rgba(255,211,0,0.1);
            transform: translateY(-5px);
        }

        .service-icon {
            font-size: 40px;
            margin-bottom: 20px;
            display: inline-block;
        }

        .service-card h3 {
            font-size: 20px;
            margin-bottom: 15px;
            color: var(--dark-color);
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
        }

        /* 标签云 */
        .tag-cloud-wrap {
            margin-top: 40px;
            background-color: var(--card-bg);
            padding: 30px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }

        .tag-cloud-title {
            font-weight: 700;
            margin-bottom: 20px;
            text-align: center;
        }

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

        .tag-item {
            background-color: #F0F0F0;
            padding: 6px 14px;
            border-radius: 4px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
        }

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

        /* 解决方案与流程 */
        .solutions-tabs {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .tab-btn {
            background-color: var(--card-bg);
            border: 2px solid var(--border-color);
            padding: 10px 24px;
            font-weight: 700;
            border-radius: 4px;
            cursor: pointer;
            transition: var(--transition);
        }

        .tab-btn.active, .tab-btn:hover {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            color: var(--dark-color);
        }

        .solution-content {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 40px;
        }

        .solution-panel {
            display: none;
        }

        .solution-panel.active {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

        .flow-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 50px;
        }

        .flow-step {
            text-align: center;
            position: relative;
        }

        .flow-step-num {
            width: 50px;
            height: 50px;
            background-color: var(--dark-color);
            color: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            margin: 0 auto 20px auto;
            font-size: 18px;
            border: 3px solid var(--primary-color);
        }

        .flow-step h4 {
            font-size: 16px;
            margin-bottom: 8px;
        }

        .flow-step p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 案例中心 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .case-card {
            background-color: var(--card-bg);
            border-radius: 12px;
            overflow: hidden;
            border: 2px solid var(--border-color);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

        .case-card:hover {
            border-color: var(--primary-color);
            transform: translateY(-4px);
        }

        .case-img-wrap {
            width: 100%;
            height: 240px;
            overflow: hidden;
            background-color: #EEE;
        }

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

        .case-info {
            padding: 30px;
        }

        .case-tag {
            font-size: 12px;
            background-color: var(--accent-yellow);
            color: #B58A00;
            padding: 4px 10px;
            border-radius: 4px;
            font-weight: 700;
            display: inline-block;
            margin-bottom: 12px;
        }

        .case-info h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: var(--dark-color);
        }

        .case-info p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 15px;
        }

        /* 对比评测 */
        .comparison-table-wrap {
            overflow-x: auto;
            background-color: var(--card-bg);
            border-radius: 8px;
            border: 2px solid var(--dark-color);
            box-shadow: 6px 6px 0px var(--dark-color);
            margin-bottom: 40px;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        .comparison-table th, .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            background-color: var(--dark-color);
            color: #FFFFFF;
            font-weight: 700;
        }

        .comparison-table th.highlight {
            background-color: var(--primary-color);
            color: var(--dark-color);
        }

        .comparison-table tr:hover {
            background-color: #FCFDF4;
        }

        .comparison-table td.highlight-td {
            background-color: rgba(255,211,0,0.05);
            font-weight: 600;
        }

        .score-box {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            background-color: var(--accent-yellow);
            border: 2px dashed var(--primary-color);
            padding: 20px;
            border-radius: 8px;
            margin-top: 30px;
        }

        .score-stars {
            font-size: 24px;
            color: #FF9900;
        }

        .score-num {
            font-size: 28px;
            font-weight: 900;
            color: var(--dark-color);
        }

        /* Token 比价 */
        .token-calc-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .token-table {
            width: 100%;
            border-collapse: collapse;
        }

        .token-table th, .token-table td {
            padding: 12px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

        .token-table th {
            text-align: left;
            color: var(--text-muted);
        }

        .price-badge {
            background-color: #E2FCD4;
            color: #276A08;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 700;
            font-size: 12px;
        }

        /* 培训课程 */
        .course-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .course-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 30px;
            transition: var(--transition);
        }

        .course-card:hover {
            border-color: var(--primary-color);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }

        .course-org {
            font-size: 12px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 10px;
            display: block;
        }

        .course-card h3 {
            font-size: 18px;
            color: var(--dark-color);
            margin-bottom: 15px;
        }

        .course-meta {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
            margin-top: 20px;
        }

        /* FAQ手风琴 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            margin-bottom: 12px;
            border-radius: 6px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-header {
            padding: 20px;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-header::after {
            content: '+';
            font-size: 20px;
            transition: var(--transition);
        }

        .faq-item.active {
            border-color: var(--primary-color);
        }

        .faq-item.active .faq-header::after {
            content: '-';
            transform: rotate(90deg);
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: #FAFAFA;
        }

        .faq-content {
            padding: 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            border-top: 1px solid var(--border-color);
        }

        /* 客户评论 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .review-card {
            background-color: var(--card-bg);
            border-radius: 8px;
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
        }

        .review-text {
            font-size: 14px;
            color: var(--text-main);
            margin-bottom: 20px;
            font-style: italic;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .review-avatar {
            width: 45px;
            height: 45px;
            background-color: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            color: var(--dark-color);
        }

        .review-meta h4 {
            font-size: 14px;
            color: var(--dark-color);
        }

        .review-meta span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 最新资讯与文章列表 */
        .news-section {
            background-color: #FFFFFF;
        }

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

        .news-card {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

        .news-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary-color);
        }

        .news-img {
            height: 180px;
            background-color: var(--accent-yellow);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

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

        .news-info {
            padding: 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-info h3 {
            font-size: 16px;
            margin-bottom: 12px;
            line-height: 1.5;
        }

        .news-info h3 a {
            color: var(--dark-color);
            text-decoration: none;
            transition: var(--transition);
        }

        .news-info h3 a:hover {
            color: var(--primary-color);
        }

        .news-date {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 需求匹配与联系我们表单 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .contact-form-wrap {
            background-color: var(--card-bg);
            padding: 40px;
            border-radius: 8px;
            border: 2px solid var(--dark-color);
            box-shadow: 8px 8px 0px var(--dark-color);
        }

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

        .form-group label {
            display: block;
            font-weight: 700;
            margin-bottom: 8px;
            font-size: 14px;
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid var(--border-color);
            border-radius: 4px;
            font-size: 14px;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
        }

        .contact-info-panel {
            background-color: var(--dark-color);
            color: #FFFFFF;
            padding: 40px;
            border-radius: 8px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .info-item {
            margin-bottom: 30px;
        }

        .info-item h4 {
            color: var(--primary-color);
            font-size: 18px;
            margin-bottom: 10px;
        }

        .info-item p, .info-item a {
            color: #CCCCCC;
            text-decoration: none;
            font-size: 14px;
        }

        .qrcode-box {
            background-color: #FFFFFF;
            padding: 15px;
            border-radius: 8px;
            display: inline-block;
            margin-top: 15px;
        }

        .qrcode-box img {
            width: 120px;
            height: 120px;
            display: block;
        }

        /* 友情链接 */
        .friendly-links {
            background-color: #F0F0F0;
            padding: 20px 0;
            font-size: 13px;
            border-bottom: 1px solid var(--border-color);
        }

        .links-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }

        .links-wrap span {
            font-weight: 700;
            color: var(--dark-color);
        }

        .links-wrap a {
            color: var(--text-muted);
            text-decoration: none;
            transition: var(--transition);
        }

        .links-wrap a:hover {
            color: var(--dark-color);
            text-decoration: underline;
        }

        /* 页脚 */
        footer {
            background-color: var(--dark-color);
            color: #888888;
            padding: 60px 0 30px 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 16px;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background-color: var(--primary-color);
        }

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

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: #888888;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--primary-color);
        }

        .footer-bottom {
            border-top: 1px solid #222222;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        /* 侧边悬浮 */
        .sidebar-kf {
            position: fixed;
            right: 20px;
            bottom: 100px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .kf-item {
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: var(--dark-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            cursor: pointer;
            font-size: 20px;
            position: relative;
            transition: var(--transition);
        }

        .kf-item:hover {
            background-color: var(--dark-color);
            color: var(--primary-color);
        }

        .kf-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: #FFFFFF;
            border: 2px solid var(--dark-color);
            border-radius: 8px;
            padding: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 160px;
        }

        .kf-popover img {
            width: 120px;
            height: 120px;
            display: block;
            margin: 0 auto 10px auto;
        }

        .kf-popover p {
            font-size: 12px;
            color: var(--dark-color);
            font-weight: 700;
        }

        .kf-item:hover .kf-popover {
            display: block;
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid, .solution-panel.active, .contact-grid {
                grid-template-columns: 1fr;
            }
            .services-grid, .reviews-grid, .course-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .token-calc-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: var(--card-bg);
                border-bottom: 3px solid var(--primary-color);
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
            .hero-title h1 {
                font-size: 2rem;
            }
            .stats-grid, .services-grid, .reviews-grid, .course-grid, .case-grid, .news-grid {
                grid-template-columns: 1fr;
            }
            .flow-timeline {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }