:root {
            --primary: #4f46e5;
            --primary-light: #818cf8;
            --secondary: #06b6d4;
            --accent: #ec4899;
            --bg-base: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #475569;
            --card-bg: rgba(255, 255, 255, 0.85);
            --border-color: rgba(226, 232, 240, 0.8);
            --gradient-rainbow: linear-gradient(135deg, #ff9a9e 0%, #fecfef 30%, #a1c4fd 70%, #c2e9fb 100%);
            --gradient-pastel: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
        }

        * {
            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(--bg-base);
            background-image: 
                radial-gradient(at 0% 0%, rgba(244, 63, 94, 0.05) 0px, transparent 50%),
                radial-gradient(at 50% 0%, rgba(79, 70, 229, 0.05) 0px, transparent 50%),
                radial-gradient(at 100% 0%, rgba(6, 182, 212, 0.05) 0px, transparent 50%);
            background-attachment: fixed;
            color: var(--text-main);
            line-height: 1.6;
        }

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

        /* 顶部导航 */
        header {
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

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

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

        .logo-area img {
            height: 40px;
            display: block;
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-menu a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.3s;
        }

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

        .nav-btn {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff !important;
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 0.9rem;
            box-shadow: 0 4px 10px rgba(79, 70, 229, 0.2);
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(79, 70, 229, 0.3);
        }

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

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--text-main);
            border-radius: 2px;
            transition: 0.3s;
        }

        /* 斑斓彩调点缀与段落背景 */
        .color-badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            background: var(--gradient-rainbow);
            color: #1e1b4b;
            margin-bottom: 15px;
            border: 1px solid rgba(255, 255, 255, 0.4);
        }

        /* 首屏 Hero Section (无图片) */
        .hero {
            padding: 100px 0 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-badge-wrap {
            display: inline-flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid var(--border-color);
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 25px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
        }

        .hero-badge-dot {
            width: 8px;
            height: 8px;
            background-color: var(--secondary);
            border-radius: 50%;
            margin-right: 8px;
            animation: pulse 2s infinite;
        }

        .hero-badge-text {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-muted);
        }

        .hero h1 {
            font-size: 2.8rem;
            line-height: 1.25;
            margin-bottom: 25px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.02em;
        }

        .hero h1 span {
            background: linear-gradient(135deg, var(--primary), var(--accent), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            max-width: 750px;
            margin: 0 auto 35px auto;
            font-size: 1.15rem;
            color: var(--text-muted);
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 50px;
        }

        .btn {
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: #ffffff;
            box-shadow: 0 8px 25px rgba(79, 70, 229, 0.25);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(79, 70, 229, 0.35);
        }

        .btn-secondary {
            background: #ffffff;
            color: var(--text-main);
            border: 1px solid var(--border-color);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.02);
        }

        .btn-secondary:hover {
            transform: translateY(-2px);
            background: #f8fafc;
            border-color: #cbd5e1;
        }

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

        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
            transition: transform 0.3s, box-shadow 0.3s;
            backdrop-filter: blur(10px);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(79, 70, 229, 0.1);
        }

        .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 8px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 常规 Section 结构 */
        section {
            padding: 80px 0;
            border-top: 1px solid var(--border-color);
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 15px;
        }

        .section-header p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-muted);
            font-size: 1rem;
        }

        /* 卡片网格 */
        .card-grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

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

        .card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(79, 70, 229, 0.08);
            border-color: var(--primary-light);
        }

        .card-icon {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            background: var(--gradient-rainbow);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 1.5rem;
            color: #1e1b4b;
        }

        .card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-main);
        }

        .card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            flex-grow: 1;
        }

        /* 平台介绍分栏 */
        .about-wrap {
            display: flex;
            gap: 50px;
            align-items: center;
        }

        .about-content {
            flex: 1;
        }

        .about-image-wrap {
            flex: 1;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .about-image-wrap img {
            border-radius: 16px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
            max-width: 100%;
        }

        .about-features {
            list-style: none;
            margin-top: 25px;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .about-features li {
            position: relative;
            padding-left: 24px;
            font-weight: 500;
            color: var(--text-muted);
        }

        .about-features li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--secondary);
            font-weight: bold;
        }

        /* 流程步骤时间线 */
        .timeline {
            position: relative;
            max-width: 1000px;
            margin: 0 auto;
        }

        .timeline::before {
            content: '';
            position: absolute;
            width: 4px;
            background: linear-gradient(180deg, var(--primary), var(--secondary));
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -2px;
            border-radius: 2px;
        }

        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
        }

        .timeline-item::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            right: -10px;
            background-color: #fff;
            border: 4px solid var(--primary);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        }

        .timeline-left {
            left: 0;
        }

        .timeline-right {
            left: 50%;
        }

        .timeline-right::after {
            left: -10px;
        }

        .timeline-content {
            padding: 20px 30px;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            position: relative;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
        }

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
            backdrop-filter: blur(10px);
        }

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

        th, td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.95rem;
        }

        th {
            background-color: rgba(79, 70, 229, 0.03);
            color: var(--text-main);
            font-weight: 700;
        }

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

        .highlight-row {
            background-color: rgba(6, 182, 212, 0.03);
        }

        .badge-star {
            color: #fbbf24;
            font-size: 1.1rem;
        }

        /* 标签云与模型 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 30px;
        }

        .tag-item {
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
            transition: all 0.2s;
        }

        .tag-item:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

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

        .comment-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
            position: relative;
        }

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

        .comment-quote::before {
            content: "“";
            font-size: 3rem;
            position: absolute;
            left: -15px;
            top: -25px;
            color: rgba(79, 70, 229, 0.1);
        }

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

        .comment-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--gradient-rainbow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #1e1b4b;
            font-size: 0.9rem;
        }

        .comment-info h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-main);
        }

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

        /* FAQ 折叠面板 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: border-color 0.3s;
        }

        .faq-question {
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-main);
            user-select: none;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: rgba(248, 250, 252, 0.5);
        }

        .faq-answer-content {
            padding: 20px;
            font-size: 0.95rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            line-height: 1.7;
        }

        .faq-icon {
            font-size: 1.2rem;
            transition: transform 0.3s;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        /* 双分栏排版 - 表单与联系 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: start;
        }

        .form-wrap {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.03);
        }

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

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-main);
        }

        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #cbd5e1;
            border-radius: 8px;
            font-size: 0.95rem;
            color: var(--text-main);
            background-color: #f8fafc;
            transition: all 0.3s;
            font-family: inherit;
        }

        .form-input:focus, .form-select:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
        }

        .contact-info-wrap {
            background: var(--gradient-pastel);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            height: 100%;
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .qr-section {
            text-align: center;
            background: #ffffff;
            padding: 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .qr-section img {
            max-width: 150px;
            height: auto;
            margin-bottom: 10px;
            border-radius: 8px;
        }

        /* 案例图片展示 */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 35px;
        }

        .case-img-item {
            overflow: hidden;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 25px rgba(0,0,0,0.03);
            background: #ffffff;
        }

        .case-img-item img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.3s;
        }

        .case-img-item:hover img {
            transform: scale(1.05);
        }

        /* 页脚与友情链接 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            border-top: 1px solid #1e293b;
        }

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

        .footer-brand h3 {
            color: #ffffff;
            font-size: 1.3rem;
            margin-bottom: 15px;
        }

        .footer-links h4 {
            color: #ffffff;
            font-size: 1rem;
            margin-bottom: 15px;
        }

        .footer-links ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.2s;
        }

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

        .friend-links {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            margin-bottom: 30px;
        }

        .friend-links-title {
            font-size: 0.9rem;
            color: #64748b;
            margin-bottom: 15px;
            font-weight: 600;
        }

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

        .friend-links-wrap a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.85rem;
            transition: color 0.2s;
        }

        .friend-links-wrap a:hover {
            color: #ffffff;
        }

        .copyright {
            text-align: center;
            font-size: 0.85rem;
            color: #64748b;
            border-top: 1px solid #1e293b;
            padding-top: 30px;
        }

        /* 侧边悬浮客服 */
        .float-panel {
            position: fixed;
            right: 20px;
            bottom: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-item {
            width: 50px;
            height: 50px;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
            transition: all 0.3s;
            position: relative;
        }

        .float-item:hover {
            background: var(--primary);
            color: #ffffff;
            transform: translateY(-3px);
        }

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

        .float-qr-pop {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 160px;
        }

        .float-qr-pop img {
            width: 100%;
            height: auto;
            border-radius: 6px;
        }

        .float-item:hover .float-qr-pop {
            display: block;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .comments-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .contact-grid {
                grid-template-columns: 1fr;
            }
            .about-wrap {
                flex-direction: column;
            }
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2rem;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #ffffff;
                border-bottom: 1px solid var(--border-color);
                flex-direction: column;
                padding: 20px;
                gap: 15px;
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .timeline::before {
                left: 20px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 50px;
                padding-right: 0;
            }
            .timeline-item::after {
                left: 10px;
                right: auto;
            }
            .timeline-right {
                left: 0;
            }
            .card-grid-3, .card-grid-4, .comments-grid, .case-gallery {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        @keyframes pulse {
            0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.4); }
            70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(6, 182, 212, 0); }
            100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(6, 182, 212, 0); }
        }