:root {
            --primary: #2563eb;
            --primary-grad: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #db2777 100%);
            --bg-light: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #475569;
            --border-color: #e2e8f0;
            --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
        }

        body {
            line-height: 1.6;
        }

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

        /* 顶部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
        }

        .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: 40px;
            width: auto;
        }

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

        .nav-menu a {
            text-decoration: none;
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

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

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-outline {
            border: 1px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.05);
        }

        .btn-primary {
            background: var(--primary-grad);
            color: #ffffff;
            border: none;
        }

        .btn-primary:hover {
            opacity: 0.9;
            transform: translateY(-1px);
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: transparent;
        }

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background: var(--text-main);
            border-radius: 3px;
            transition: var(--transition);
        }

        /* 首屏 Hero 区 - 无图，纯 CSS 亮彩渐变与几何块 */
        .hero {
            padding: 160px 0 100px 0;
            background: radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.08) 0%, rgba(37, 99, 235, 0.03) 50%, transparent 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: linear-gradient(135deg, rgba(219, 39, 119, 0.15), rgba(124, 58, 237, 0.15));
            border-radius: 50%;
            filter: blur(80px);
            top: -100px;
            right: -100px;
            z-index: 1;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-text h1 {
            font-size: clamp(28px, 4vw, 42px);
            line-height: 1.25;
            font-weight: 800;
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 20px;
        }

        .hero-text p {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 30px;
        }

        .hero-features {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 35px;
        }

        .feat-badge {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-main);
            box-shadow: 0 2px 5px rgba(0,0,0,0.02);
        }

        .hero-action {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        /* 纯 CSS 首屏抽象科技大盘 */
        .hero-panel {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 24px;
            padding: 30px;
            box-shadow: var(--card-shadow);
            position: relative;
        }

        .hero-panel::after {
            content: '';
            position: absolute;
            inset: -1px;
            border-radius: 24px;
            background: var(--primary-grad);
            z-index: -1;
            padding: 1px;
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }

        .panel-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .panel-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #10b981;
            box-shadow: 0 0 8px #10b981;
        }

        .panel-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
        }

        .panel-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .panel-card {
            background: var(--bg-light);
            border-radius: 12px;
            padding: 15px;
            border: 1px solid var(--border-color);
        }

        .panel-val {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .panel-lbl {
            font-size: 11px;
            color: var(--text-muted);
        }

        .panel-bar-group {
            margin-top: 20px;
        }

        .panel-bar-item {
            margin-bottom: 12px;
        }

        .panel-bar-info {
            display: flex;
            justify-content: space-between;
            font-size: 11px;
            margin-bottom: 4px;
        }

        .panel-bar {
            height: 6px;
            background: var(--border-color);
            border-radius: 3px;
            overflow: hidden;
        }

        .panel-fill {
            height: 100%;
            background: var(--primary-grad);
            border-radius: 3px;
        }

        /* 通用区块设置 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .sec-title {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px auto;
        }

        .sec-title h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 15px;
            color: var(--text-main);
        }

        .sec-title p {
            color: var(--text-muted);
            font-size: 16px;
        }

        /* 关于我们 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 15px;
        }

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

        .about-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            text-align: center;
        }

        .stat-item {
            background: #ffffff;
            padding: 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }

        .stat-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
        }

        /* AIGC 服务体系 */
        .grid-cards {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
        }

        .service-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            box-shadow: var(--card-shadow);
            transition: var(--transition);
        }

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

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(37, 99, 235, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
            color: var(--primary);
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

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

        /* 全自动制作流程 */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
            position: relative;
        }

        .process-step {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            text-align: center;
            box-shadow: var(--card-shadow);
            position: relative;
        }

        .step-num {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary-grad);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            margin: 0 auto 15px auto;
        }

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

        .case-large {
            grid-column: span 1;
        }

        .case-card {
            background: #ffffff;
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }

        .case-img-box {
            position: relative;
            background: #e2e8f0;
            overflow: hidden;
        }

        .case-img-box img {
            width: 100%;
            display: block;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-card:hover .case-img-box img {
            transform: scale(1.03);
        }

        .case-info {
            padding: 20px;
        }

        .case-info h4 {
            font-size: 18px;
            margin-bottom: 8px;
            font-weight: 700;
        }

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

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            box-shadow: var(--card-shadow);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

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

        th {
            background: rgba(37, 99, 235, 0.02);
            font-weight: 700;
            color: var(--text-main);
        }

        .score-badge {
            display: inline-flex;
            align-items: center;
            background: #fef08a;
            color: #854d0e;
            padding: 4px 10px;
            border-radius: 6px;
            font-weight: 700;
            font-size: 13px;
        }

        /* 标签云与模型 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .tag-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            box-shadow: 0 2px 4px rgba(0,0,0,0.01);
            transition: var(--transition);
        }

        .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: scale(1.05);
        }

        /* 表单区域 */
        .form-section {
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.02) 0%, rgba(124, 58, 237, 0.02) 100%);
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: flex-start;
        }

        .form-box {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 40px;
            box-shadow: var(--card-shadow);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 14px;
            color: var(--text-main);
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

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

        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 15px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }

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

        .faq-icon {
            transition: var(--transition);
        }

        .faq-body {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            color: var(--text-muted);
            font-size: 14px;
        }

        .faq-item.active .faq-body {
            padding: 0 20px 20px 20px;
            max-height: 200px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180px);
        }

        /* 评论区 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 25px;
        }

        .comment-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 25px;
            box-shadow: var(--card-shadow);
        }

        .comment-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 15px;
        }

        .comment-info h5 {
            font-size: 15px;
            font-weight: 700;
        }

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

        /* 侧边悬浮 */
        .float-kefu {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 999;
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 10px;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            text-align: center;
            width: 120px;
            transition: var(--transition);
        }

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

        .float-kefu img {
            width: 100px;
            height: 100px;
            border-radius: 8px;
            display: block;
            margin-bottom: 6px;
        }

        .float-kefu span {
            font-size: 12px;
            font-weight: 700;
            color: var(--primary);
        }

        /* 友情链接与底部 */
        footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 14px;
        }

        footer a {
            color: #e2e8f0;
            text-decoration: none;
            transition: var(--transition);
        }

        footer a:hover {
            color: #3b82f6;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand img {
            height: 40px;
            margin-bottom: 15px;
        }

        .footer-links h4 {
            color: #ffffff;
            font-size: 16px;
            margin-bottom: 15px;
        }

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

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

        .friend-links {
            border-top: 1px solid #1e293b;
            padding-top: 25px;
            margin-top: 25px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            justify-content: center;
            font-size: 12px;
        }

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

        .friend-links a:hover {
            color: #94a3b8;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 25px;
            text-align: center;
            font-size: 12px;
            color: #64748b;
        }

        /* 响应式样式 */
        @media (max-width: 992px) {
            .hero-grid, .about-grid, .form-grid, .case-grid {
                grid-template-columns: 1fr;
            }
            .hero-panel {
                max-width: 500px;
                margin: 0 auto;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-btns {
                display: none;
            }
            .float-kefu {
                display: none;
            }
        }