/* 基础重置 */
        :root {
            --bg-primary: #ffffff;
            --bg-secondary: #f6f6f6;
            --bg-tertiary: #eeeeee;
            --text-primary: #111111;
            --text-secondary: #555555;
            --text-muted: #888888;
            --border-color: #111111;
            --border-light: #dddddd;
            --accent-color: #000000;
            --accent-hover: #333333;
            --max-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        /* 统一容器 */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 胶片风格修饰线 */
        .film-line {
            height: 4px;
            background: repeating-linear-gradient(90deg, #111, #111 10px, transparent 10px, transparent 20px);
            margin: 20px 0;
        }

        /* 标题设计 */
        h1, h2, h3, h4 {
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .section-header {
            margin-bottom: 50px;
            position: relative;
        }

        .section-header h2 {
            font-size: 2.2rem;
            display: inline-block;
            border-bottom: 3px solid var(--border-color);
            padding-bottom: 8px;
            margin-bottom: 10px;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 1.1rem;
        }

        /* 按钮样式 */
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background-color: var(--accent-color);
            color: #fff;
            text-decoration: none;
            font-weight: 600;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
            text-align: center;
        }

        .btn:hover {
            background-color: #fff;
            color: var(--text-primary);
        }

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

        .btn-outline:hover {
            background-color: var(--border-color);
            color: #fff;
        }

        /* 导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 2px solid var(--border-color);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

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

        .logo-area img {
            height: 35px;
            width: auto;
        }

        .logo-area span {
            font-size: 1.25rem;
            font-weight: 800;
            letter-spacing: 0.1em;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 24px;
            align-items: center;
        }

        .nav-menu a {
            color: var(--text-primary);
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 600;
            transition: var(--transition);
        }

        .nav-menu a:hover {
            opacity: 0.7;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            background: none;
            border: none;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 2px;
            background-color: var(--text-primary);
            transition: var(--transition);
        }

        /* 首屏 Hero - 无图片设计，大字排版，网格感 */
        .hero {
            background-color: var(--bg-secondary);
            padding: 100px 0;
            position: relative;
            overflow: hidden;
            border-bottom: 3px solid var(--border-color);
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: radial-gradient(var(--text-muted) 1px, transparent 1px);
            background-size: 24px 24px;
            opacity: 0.15;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
        }

        .hero-tag {
            display: inline-block;
            padding: 4px 10px;
            background-color: var(--text-primary);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: 20px;
            text-transform: uppercase;
        }

        .hero h1 {
            font-size: 3.5rem;
            line-height: 1.15;
            color: var(--text-primary);
            margin-bottom: 24px;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-secondary);
            margin-bottom: 40px;
            max-width: 700px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* 平台软件介绍 */
        .platform-intro {
            background-color: var(--bg-primary);
        }

        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .intro-text p {
            margin-bottom: 20px;
            color: var(--text-secondary);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 30px;
        }

        .tag-item {
            padding: 6px 12px;
            border: 1px solid var(--border-color);
            background-color: var(--bg-secondary);
            font-size: 0.85rem;
            font-weight: 600;
        }

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

        .metric-card {
            border: 1px solid var(--border-color);
            padding: 30px 20px;
            text-align: center;
            background-color: var(--bg-secondary);
            position: relative;
        }

        .metric-card::after {
            content: '';
            position: absolute;
            bottom: 4px;
            right: 4px;
            width: 8px;
            height: 8px;
            background-color: var(--border-color);
        }

        .metric-num {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1;
            margin-bottom: 10px;
        }

        .metric-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 600;
        }

        /* 全平台AIGC服务体系 & 卡片样式 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            border: 1px solid var(--border-color);
            background: var(--bg-primary);
            padding: 35px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 6px 6px 0px var(--border-color);
        }

        .service-icon {
            font-size: 2rem;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            border-bottom: 1px solid var(--border-light);
            padding-bottom: 10px;
        }

        .service-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        /* 工作流步骤 */
        .workflow-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
            margin-top: 40px;
        }

        .workflow-step {
            border: 1px solid var(--border-color);
            background: var(--bg-secondary);
            padding: 24px;
            position: relative;
        }

        .step-num {
            font-size: 1.5rem;
            font-weight: 900;
            background-color: var(--border-color);
            color: #fff;
            width: 35px;
            height: 35px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
        }

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

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

        /* 全行业解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .solution-item {
            border-left: 4px solid var(--border-color);
            padding-left: 20px;
            margin-bottom: 15px;
        }

        .solution-item h3 {
            font-size: 1.25rem;
            margin-bottom: 8px;
        }

        .solution-item p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* 服务网络 & 流程 */
        .info-panel {
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-color);
            padding: 40px;
        }

        /* 案例中心 - 相册感排版 */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .case-item {
            border: 1px solid var(--border-color);
            background-color: var(--bg-primary);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .case-img-wrapper {
            position: relative;
            overflow: hidden;
            background-color: #ddd;
            aspect-ratio: 16/10;
            border-bottom: 1px solid var(--border-color);
        }

        .case-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            filter: grayscale(100%);
            transition: var(--transition);
        }

        .case-item:hover .case-img-wrapper img {
            filter: grayscale(0%);
            transform: scale(1.05);
        }

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

        .case-info h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

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

        .case-tag {
            align-self: flex-start;
            margin-top: 15px;
            font-size: 0.75rem;
            font-weight: 700;
            border: 1px solid var(--border-color);
            padding: 2px 8px;
        }

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            margin-top: 30px;
        }

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

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

        .evaluation-table th {
            background-color: var(--bg-secondary);
            font-weight: 800;
        }

        .evaluation-table tr:hover {
            background-color: var(--bg-secondary);
        }

        .highlight-cell {
            background-color: rgba(0,0,0,0.03);
            font-weight: 700;
        }

        .evaluation-score {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg-secondary);
            padding: 24px;
            border: 2px solid var(--border-color);
            margin-bottom: 40px;
        }

        .score-big {
            font-size: 3.5rem;
            font-weight: 900;
            line-height: 1;
        }

        .score-stars {
            color: #000;
            font-size: 1.5rem;
        }

        /* Token 比价 */
        .token-pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .token-card {
            border: 1px solid var(--border-color);
            padding: 24px;
            background-color: var(--bg-primary);
        }

        .token-card.best-deal {
            box-shadow: 6px 6px 0 #111;
        }

        .token-card h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 8px;
        }

        .price-tag {
            font-size: 1.75rem;
            font-weight: 800;
            margin: 15px 0;
        }

        .price-tag span {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .training-card {
            border: 1px solid var(--border-color);
            padding: 30px;
            background-color: var(--bg-secondary);
        }

        .training-card h3 {
            font-size: 1.35rem;
            margin-bottom: 15px;
        }

        .course-list {
            list-style: none;
            margin-top: 20px;
        }

        .course-list li {
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
        }

        .course-list li::before {
            content: "✓";
            color: #000;
            font-weight: bold;
        }

        /* 表单区域 */
        .form-section {
            background-color: var(--bg-secondary);
        }

        .form-wrapper {
            max-width: 700px;
            margin: 0 auto;
            border: 2px solid var(--border-color);
            background-color: var(--bg-primary);
            padding: 40px;
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 700;
            font-size: 0.95rem;
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            background-color: var(--bg-primary);
            font-family: inherit;
            font-size: 1rem;
        }

        .form-control:focus {
            outline: none;
            box-shadow: 4px 4px 0 #111;
        }

        /* 用户评论 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .comment-card {
            border: 1px solid var(--border-color);
            padding: 24px;
            background-color: var(--bg-primary);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .comment-text {
            font-style: italic;
            margin-bottom: 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-light);
            padding-top: 15px;
        }

        .user-avatar {
            width: 40px;
            height: 40px;
            background-color: #111;
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }

        .user-info h4 {
            font-size: 0.95rem;
        }

        .user-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* FAQ折叠面板 */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 20px 0;
            font-size: 1.15rem;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-primary);
        }

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

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

        .faq-icon::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: 300;
        }

        .faq-item.active .faq-icon::after {
            content: '-';
        }

        /* 自助排查与百科 */
        .help-panels {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .help-box {
            border: 1px solid var(--border-color);
            padding: 30px;
            background-color: var(--bg-secondary);
        }

        .help-box h3 {
            font-size: 1.25rem;
            margin-bottom: 15px;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 8px;
        }

        .help-box ul {
            list-style: none;
        }

        .help-box li {
            margin-bottom: 10px;
            font-size: 0.95rem;
        }

        .help-box strong {
            display: block;
            margin-top: 5px;
        }

        /* 资讯与知识库 */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .article-card {
            border: 1px solid var(--border-color);
            padding: 24px;
            background-color: var(--bg-primary);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .article-card h3 {
            font-size: 1.1rem;
            margin-bottom: 12px;
        }

        .article-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        /* 联系我们与页脚 */
        .contact-area {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .contact-info-list {
            list-style: none;
            margin-top: 20px;
        }

        .contact-info-list li {
            margin-bottom: 15px;
            font-size: 1.05rem;
        }

        .qrcode-box {
            border: 1px solid var(--border-color);
            padding: 20px;
            text-align: center;
            background-color: var(--bg-secondary);
        }

        .qrcode-box img {
            max-width: 150px;
            height: auto;
            border: 1px solid var(--border-color);
            margin-top: 10px;
        }

        footer {
            background-color: var(--text-primary);
            color: #fff;
            padding: 50px 0 30px 0;
            font-size: 0.9rem;
        }

        footer a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }

        footer a:hover {
            color: #fff;
        }

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

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

        .footer-bottom {
            border-top: 1px solid #333;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

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

        .float-item {
            width: 50px;
            height: 50px;
            background-color: var(--text-primary);
            color: #fff;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }

        .float-item:hover {
            background-color: #fff;
            color: var(--text-primary);
        }

        .float-item svg {
            width: 24px;
            height: 24px;
            fill: currentColor;
        }

        .popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: #fff;
            border: 2px solid var(--border-color);
            padding: 15px;
            display: none;
            box-shadow: 4px 4px 0 rgba(0,0,0,0.1);
            color: var(--text-primary);
            text-align: center;
            width: 180px;
        }

        .popover img {
            width: 100%;
            height: auto;
        }

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

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .metrics-grid, .services-grid, .workflow-timeline, .case-gallery, .comments-grid, .articles-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero h1 {
                font-size: 2.8rem;
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 50px 0;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: #fff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 2px solid var(--border-color);
                box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .grid-2, .solutions-grid, .training-grid, .help-panels, .contact-area, .footer-grid {
                grid-template-columns: 1fr;
            }
            .metrics-grid, .services-grid, .workflow-timeline, .case-gallery, .comments-grid, .articles-list {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
            }
        }