:root {
            --primary: #2563eb;
            --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
            --secondary: #7c3aed;
            --dark: #0f172a;
            --light: #f8fafc;
            --border: #e2e8f0;
            --text-main: #334155;
            --text-muted: #64748b;
            --accent: #f59e0b;
        }

        * {
            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;
            color: var(--text-main);
            background-color: #fff;
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 统一容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

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

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

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: var(--dark);
            font-weight: 700;
            font-size: 1.25rem;
        }

        .brand img {
            height: 40px;
            width: auto;
        }

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

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

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

        .nav-btn {
            background: var(--primary-gradient);
            color: white;
            padding: 8px 20px;
            border-radius: 99px;
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 600;
            transition: opacity 0.3s, transform 0.2s;
        }

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

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

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

        /* 首屏 Hero (无图，纯渐变与几何感设计) */
        .hero {
            background: radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.05) 50%, rgba(255, 255, 255, 0) 100%), var(--light);
            padding: 120px 0 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(236, 72, 153, 0.03) 0%, transparent 60%);
            pointer-events: none;
        }

        .badge-premium {
            display: inline-block;
            background: linear-gradient(90deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
            color: var(--secondary);
            padding: 6px 16px;
            border-radius: 99px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(139, 92, 246, 0.2);
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }

        .hero h1 span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px;
        }

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

        .btn-main {
            background: var(--primary-gradient);
            color: white;
            padding: 16px 36px;
            border-radius: 12px;
            font-size: 1.1rem;
            font-weight: 700;
            text-decoration: none;
            box-shadow: 0 10px 25px -5px rgba(139, 92, 246, 0.3);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .btn-main:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 30px -5px rgba(139, 92, 246, 0.5);
        }

        .btn-sub {
            background: white;
            color: var(--dark);
            border: 1px solid var(--border);
            padding: 16px 36px;
            border-radius: 12px;
            font-size: 1.1rem;
            font-weight: 600;
            text-decoration: none;
            transition: background 0.3s, border-color 0.3s;
        }

        .btn-sub:hover {
            background: var(--light);
            border-color: var(--text-muted);
        }

        /* 核心数据卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 60px;
        }

        .stat-card {
            background: white;
            padding: 24px;
            border-radius: 16px;
            border: 1px solid var(--border);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s;
        }

        .stat-card:hover {
            transform: translateY(-5px);
        }

        .stat-number {
            font-size: 2.25rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

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

        section:nth-child(even) {
            background-color: var(--light);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 60px;
        }

        .section-header h2 {
            font-size: 2.25rem;
            color: var(--dark);
            margin-bottom: 16px;
            font-weight: 800;
        }

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

        /* 卡片网格 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .card {
            background: white;
            border-radius: 20px;
            padding: 32px;
            border: 1px solid var(--border);
            box-shadow: 0 4px 20px -2px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .card:hover {
            transform: translateY(-8px);
            border-color: rgba(139, 92, 246, 0.4);
            box-shadow: 0 12px 30px -10px rgba(0,0,0,0.1);
        }

        .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: bold;
            font-size: 1.5rem;
            margin-bottom: 24px;
        }

        .card h3 {
            font-size: 1.35rem;
            color: var(--dark);
            margin-bottom: 12px;
            font-weight: 700;
        }

        .card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* 标签云 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 16px;
        }

        .tag-item {
            background: var(--light);
            border: 1px solid var(--border);
            padding: 4px 10px;
            border-radius: 6px;
            font-size: 0.8rem;
            color: var(--text-main);
            font-weight: 500;
        }

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            background: white;
            border-radius: 16px;
            border: 1px solid var(--border);
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
        }

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

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

        th {
            background-color: var(--light);
            font-weight: 700;
            color: var(--dark);
        }

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

        .highlight-col {
            background-color: rgba(59, 130, 246, 0.02);
            font-weight: 600;
        }

        .rating-box {
            background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
            border: 1px solid #fde68a;
            padding: 24px;
            border-radius: 16px;
            margin-bottom: 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }

        .rating-stars {
            color: var(--accent);
            font-size: 1.5rem;
            font-weight: bold;
        }

        .rating-score {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--dark);
        }

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

        @media (max-width: 768px) {
            .case-gallery {
                grid-template-columns: 1fr;
            }
        }

        .case-card {
            background: white;
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .case-img-container {
            width: 100%;
            height: auto;
            position: relative;
            background: var(--light);
        }

        .case-card img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
        }

        .case-body {
            padding: 24px;
        }

        .case-tag {
            color: var(--primary);
            font-weight: 700;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 8px;
            display: inline-block;
        }

        /* 步骤流程 */
        .steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
            position: relative;
        }

        .step-item {
            position: relative;
            background: white;
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border);
        }

        .step-num {
            position: absolute;
            top: -20px;
            left: 30px;
            width: 40px;
            height: 40px;
            background: var(--primary-gradient);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            box-shadow: 0 4px 10px rgba(139, 92, 246, 0.4);
        }

        /* FAQ 手风琴 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

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

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            text-align: left;
            background: none;
            border: none;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            outline: none;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--text-muted);
            transition: transform 0.3s;
        }

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

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: var(--light);
        }

        .faq-answer-inner {
            padding: 20px 24px;
            color: var(--text-main);
            font-size: 0.95rem;
            border-top: 1px solid var(--border);
        }

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

        @media (max-width: 992px) {
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
        }

        .testimonial-card {
            background: white;
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 24px;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
        }

        .user-info {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .user-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .user-meta h4 {
            font-size: 0.95rem;
            color: var(--dark);
        }

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

        /* 需求表单与联系方式 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        @media (max-width: 992px) {
            .contact-grid {
                grid-template-columns: 1fr;
            }
        }

        .form-container {
            background: white;
            padding: 40px;
            border-radius: 20px;
            border: 1px solid var(--border);
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

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

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
            font-size: 0.95rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: 8px;
            outline: none;
            font-size: 1rem;
            transition: border-color 0.3s;
        }

        .form-control:focus {
            border-color: var(--primary);
        }

        select.form-control {
            appearance: none;
            background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            background-size: 16px;
            padding-right: 40px;
        }

        .btn-submit {
            width: 100%;
            background: var(--primary-gradient);
            color: white;
            border: none;
            padding: 14px;
            border-radius: 8px;
            font-size: 1.05rem;
            font-weight: 700;
            cursor: pointer;
            transition: opacity 0.3s;
        }

        .btn-submit:hover {
            opacity: 0.95;
        }

        .contact-info-card {
            background: var(--dark);
            color: white;
            padding: 40px;
            border-radius: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-info-card h3 {
            color: white;
            margin-bottom: 24px;
            font-size: 1.5rem;
        }

        .contact-item {
            margin-bottom: 20px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .contact-item-icon {
            background: rgba(255,255,255,0.1);
            width: 40px;
            height: 40px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .qr-area {
            margin-top: 30px;
            background: rgba(255,255,255,0.05);
            padding: 20px;
            border-radius: 12px;
            text-align: center;
        }

        .qr-area img {
            max-width: 130px;
            border-radius: 8px;
            margin-bottom: 8px;
        }

        /* 资讯与知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .news-card {
            background: white;
            border-radius: 16px;
            padding: 24px;
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
            text-decoration: none;
            transition: color 0.3s;
        }

        .news-title:hover {
            color: var(--primary);
        }

        .news-meta {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 16px;
            display: flex;
            justify-content: space-between;
        }

        /* 友情链接与页脚 */
        footer {
            background-color: var(--light);
            padding: 60px 0 30px;
            border-top: 1px solid var(--border);
            color: var(--text-main);
        }

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

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        .footer-brand img {
            height: 36px;
            margin-bottom: 16px;
        }

        .footer-title {
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 16px;
            font-size: 1rem;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s;
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .friend-links-area {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            margin-bottom: 24px;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .friend-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.85rem;
        }

        .friend-links a:hover {
            color: var(--primary);
        }

        .copyright-area {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 侧边浮动客服 */
        .float-service {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: white;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            border: 1px solid var(--border);
        }

        .float-btn svg {
            width: 24px;
            height: 24px;
            fill: var(--primary);
        }

        .float-btn:hover .qr-hover-box {
            display: block;
        }

        .qr-hover-box {
            display: none;
            position: absolute;
            right: 60px;
            bottom: 0;
            background: white;
            border: 1px solid var(--border);
            padding: 12px;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            text-align: center;
            width: 140px;
        }

        .qr-hover-box img {
            width: 116px;
            height: 116px;
            border-radius: 6px;
        }

        .qr-hover-box span {
            font-size: 0.75rem;
            color: var(--dark);
            font-weight: 600;
        }

        /* 移动端菜单激活样式 */
        @media (max-width: 992px) {
            .menu-toggle {
                display: flex;
            }

            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: white;
                border-bottom: 1px solid var(--border);
                padding: 20px 24px;
                gap: 16px;
                box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
            }

            .nav-menu.active {
                display: flex;
            }

            .nav-wrapper {
                justify-content: space-between;
            }

            .nav-actions {
                display: none;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .hero h1 {
                font-size: 2.25rem;
            }
        }

        @media (max-width: 640px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }