/* 基础重置 - 胶片摄影风格 (黑、白、银灰的纯粹世界) */
        :root {
            --bg-primary: #ffffff;
            --bg-secondary: #f4f4f4;
            --text-primary: #121212;
            --text-secondary: #555555;
            --border-color: #d1d1d1;
            --border-dark: #121212;
            --accent-color: #121212;
            --accent-light: #e5e5e5;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-family: var(--font-family);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        /* 布局容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航 */
        header {
            position: sticky;
            top: 0;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
        }

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

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

        .ai-page-logo {
            height: 40px;
            filter: grayscale(100%);
            transition: var(--transition);
        }

        .ai-page-logo:hover {
            filter: grayscale(0%);
        }

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

        .nav-menu a {
            color: var(--text-primary);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: var(--transition);
        }

        .nav-menu a:hover {
            color: #888888;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn-outline {
            border: 1px solid var(--border-dark);
            background: transparent;
            color: var(--text-primary);
            padding: 8px 18px;
            font-size: 13px;
            text-decoration: none;
            letter-spacing: 1px;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-outline:hover {
            background-color: var(--accent-color);
            color: var(--bg-primary);
        }

        /* 手机端导航按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
        }

        /* Hero区 (黑白高对比度, 无图设计) */
        .hero {
            padding: 100px 0 80px;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

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

        .hero-tag {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 3px;
            color: #888888;
            margin-bottom: 24px;
            display: inline-block;
            border: 1px solid var(--border-color);
            padding: 4px 12px;
        }

        .hero-h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 40px;
            line-height: 1.8;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 48px;
        }

        .btn-primary {
            background-color: var(--accent-color);
            color: var(--bg-primary);
            padding: 14px 28px;
            font-size: 14px;
            text-decoration: none;
            letter-spacing: 1.5px;
            font-weight: bold;
            transition: var(--transition);
            border: 1px solid var(--accent-color);
        }

        .btn-primary:hover {
            background-color: #333333;
            border-color: #333333;
        }

        /* 核心数据卡片 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
            border-top: 1px solid var(--border-color);
            padding-top: 40px;
        }

        .metric-card {
            text-align: left;
            padding: 16px 0;
        }

        .metric-card h3 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            font-family: monospace;
        }

        .metric-card p {
            font-size: 12px;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* 区块通用结构 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            margin-bottom: 60px;
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
        }

        .section-title-wrap {
            max-width: 600px;
        }

        .section-subtitle {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: #888888;
            margin-bottom: 8px;
            display: block;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.5px;
        }

        /* 全平台AIGC服务 / 一站式制作 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .service-card {
            border: 1px solid var(--border-color);
            padding: 40px 32px;
            background-color: var(--bg-primary);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

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

        .service-icon {
            font-size: 24px;
            margin-bottom: 24px;
            font-weight: 300;
            opacity: 0.8;
        }

        .service-card h4 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        /* 标签云 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-item {
            font-size: 11px;
            background-color: var(--bg-secondary);
            color: var(--text-primary);
            padding: 4px 10px;
            border: 1px solid var(--border-color);
            text-transform: uppercase;
        }

        /* 解决方案区与媒体列表 */
        .solution-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .image-collage {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }

        .collage-img-wrap {
            border: 1px solid var(--border-color);
            padding: 8px;
            background-color: var(--bg-primary);
        }

        .collage-img-wrap img {
            width: 100%;
            height: auto;
            display: block;
            filter: grayscale(100%);
            transition: var(--transition);
        }

        .collage-img-wrap img:hover {
            filter: grayscale(0%);
        }

        .solution-content h4 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .solution-list {
            list-style: none;
            margin-bottom: 32px;
        }

        .solution-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* 步骤流程 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-item {
            position: relative;
            padding-top: 32px;
            border-top: 1px solid var(--border-color);
        }

        .step-num {
            font-family: monospace;
            font-size: 12px;
            color: #888888;
            margin-bottom: 16px;
            display: block;
        }

        .step-item h5 {
            font-size: 1.1rem;
            margin-bottom: 12px;
            font-weight: 600;
        }

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

        /* 对比评测表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border: 1px solid var(--border-color);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 14px;
        }

        .compare-table th, .compare-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-color);
        }

        .compare-table th {
            background-color: var(--bg-secondary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

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

        .highlight-col {
            background-color: rgba(0, 0, 0, 0.02);
            font-weight: 600;
        }

        /* 评分卡片 */
        .rating-summary {
            display: flex;
            align-items: center;
            gap: 24px;
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-color);
            padding: 24px 32px;
            margin-top: 32px;
        }

        .rating-num {
            font-size: 3rem;
            font-weight: 800;
            font-family: monospace;
            line-height: 1;
        }

        /* 培训版块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .training-card {
            border: 1px solid var(--border-color);
            padding: 32px;
            background: #ffffff;
            transition: var(--transition);
        }

        .training-card:hover {
            border-color: var(--border-dark);
        }

        .training-badge {
            font-size: 11px;
            display: inline-block;
            border: 1px solid var(--border-dark);
            padding: 2px 8px;
            margin-bottom: 16px;
        }

        /* 评论区 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .review-card {
            border: 1px solid var(--border-color);
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-size: 14px;
            font-style: italic;
            color: var(--text-primary);
            margin-bottom: 24px;
        }

        .review-author {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
            font-size: 12px;
        }

        .author-info h6 {
            font-weight: 600;
        }

        .author-info span {
            color: #888888;
        }

        /* FAQ折叠区 */
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }

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

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 24px 0;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }

        .faq-answer p {
            padding-bottom: 24px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* 资讯 & 知识库 */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .article-card {
            border: 1px solid var(--border-color);
            padding: 24px;
            transition: var(--transition);
        }

        .article-card:hover {
            border-color: var(--border-dark);
        }

        .article-date {
            font-size: 11px;
            color: #888888;
            margin-bottom: 12px;
            display: block;
        }

        .article-card h5 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .article-card a {
            color: var(--text-primary);
            text-decoration: none;
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-weight: bold;
        }

        /* 联系与表单 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
        }

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

        .contact-details {
            margin-bottom: 32px;
        }

        .contact-detail-item {
            margin-bottom: 24px;
        }

        .contact-detail-item label {
            font-size: 11px;
            text-transform: uppercase;
            color: #888888;
            display: block;
            margin-bottom: 4px;
        }

        .contact-detail-item p {
            font-size: 16px;
            font-weight: 500;
        }

        .qr-codes {
            display: flex;
            gap: 32px;
            margin-top: 32px;
        }

        .qr-item {
            text-align: center;
            max-width: 140px;
        }

        .qr-item img {
            width: 100%;
            height: auto;
            border: 1px solid var(--border-color);
            padding: 8px;
            margin-bottom: 8px;
            background: #fff;
        }

        .qr-item span {
            font-size: 12px;
            color: var(--text-secondary);
        }

        /* 表单样式 */
        .contact-form {
            background-color: var(--bg-secondary);
            padding: 40px;
            border: 1px solid var(--border-color);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 20px;
        }

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

        .form-group.full-width {
            grid-column: span 2;
        }

        .form-group label {
            display: block;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 8px;
            text-transform: uppercase;
        }

        .form-control {
            width: 100%;
            background-color: var(--bg-primary);
            border: 1px solid var(--border-color);
            padding: 12px 16px;
            font-size: 14px;
            color: var(--text-primary);
            transition: var(--transition);
        }

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

        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }

        .btn-submit {
            width: 100%;
            background-color: var(--accent-color);
            color: var(--bg-primary);
            border: 1px solid var(--accent-color);
            padding: 14px;
            font-size: 14px;
            font-weight: bold;
            letter-spacing: 1px;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-submit:hover {
            background-color: #333333;
            border-color: #333333;
        }

        /* 友情链接区 */
        .friendship-links {
            padding: 32px 0;
            border-bottom: 1px solid var(--border-color);
            background-color: var(--bg-secondary);
        }

        .links-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
        }

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

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

        /* 页脚 */
        footer {
            background-color: #121212;
            color: #ffffff;
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-brand h4 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .footer-brand p {
            font-size: 14px;
            color: #888888;
            max-width: 360px;
        }

        .footer-links h5 {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: #ffffff;
            margin-bottom: 20px;
        }

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

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

        .footer-links ul li a {
            color: #888888;
            text-decoration: none;
            font-size: 13px;
            transition: var(--transition);
        }

        .footer-links ul li a:hover {
            color: #ffffff;
        }

        .footer-bottom {
            border-top: 1px solid #222222;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: #555555;
        }

        .footer-bottom-links {
            display: flex;
            gap: 16px;
        }

        /* 浮动客服 */
        .floating-kefu {
            position: fixed;
            bottom: 40px;
            right: 40px;
            z-index: 999;
        }

        .kefu-trigger {
            width: 50px;
            height: 50px;
            background-color: var(--accent-color);
            color: var(--bg-primary);
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            cursor: pointer;
            transition: var(--transition);
        }

        .kefu-trigger:hover {
            transform: scale(1.05);
        }

        .kefu-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: white;
            border: 1px solid var(--border-color);
            padding: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            width: 200px;
            text-align: center;
        }

        .kefu-popover img {
            width: 100%;
            height: auto;
            margin-bottom: 8px;
        }

        .kefu-popover p {
            font-size: 12px;
            color: var(--text-primary);
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .hero-h1 { font-size: 2.2rem; }
            .metrics-grid { grid-template-columns: repeat(2, 1fr); }
            .services-grid { grid-template-columns: repeat(2, 1fr); }
            .solution-wrapper { grid-template-columns: 1fr; }
            .process-steps { grid-template-columns: repeat(2, 1fr); }
            .training-grid { grid-template-columns: 1fr; }
            .reviews-grid { grid-template-columns: 1fr; }
            .articles-grid { grid-template-columns: 1fr; }
            .contact-layout { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--bg-primary);
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 16px;
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            .hero-h1 { font-size: 1.8rem; }
            .metrics-grid { grid-template-columns: 1fr; }
            .services-grid { grid-template-columns: 1fr; }
            .process-steps { grid-template-columns: 1fr; }
            .form-row { grid-template-columns: 1fr; }
            .form-group.full-width { grid-column: span 1; }
        }