/* 基础重置与变量声明 */
        :root {
            --primary: #e50914; /* 艳红 */
            --primary-hover: #b80710;
            --primary-light: #fdf2f2;
            --dark: #111111;
            --dark-gray: #1f1f1f;
            --light-gray: #f8f9fa;
            --text-dark: #2d3748;
            --text-light: #718096;
            --border-color: #e2e8f0;
            --max-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--light-gray);
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 公共布局类 */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        section {
            padding: 80px 0;
            position: relative;
        }

        .section-light {
            background-color: #ffffff;
        }

        .section-gray {
            background-color: var(--light-gray);
        }

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

        .section-header h2 {
            font-size: 2.2rem;
            color: var(--dark);
            position: relative;
            display: inline-block;
            padding-bottom: 12px;
            font-weight: 700;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--primary);
            border-radius: 2px;
        }

        .section-header p {
            color: var(--text-light);
            margin-top: 15px;
            font-size: 1.1rem;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 1rem;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(229, 9, 20, 0.3);
        }

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

        .btn-secondary:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
        }

        /* 顶部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 70px;
            display: flex;
            align-items: center;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

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

        .logo-box img {
            max-height: 40px;
        }

        .logo-box span {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 1px;
        }

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

        .nav-menu a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            padding: 8px 12px;
            border-radius: 4px;
        }

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

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

        .nav-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            transition: var(--transition);
        }

        /* Hero首屏 - 严禁出现图片资源 */
        .hero {
            background: radial-gradient(circle at 10% 20%, rgba(229, 9, 20, 0.08) 0%, rgba(0, 0, 0, 0.02) 90%), #ffffff;
            padding-top: 150px;
            padding-bottom: 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(229, 9, 20, 0.05) 0%, transparent 70%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(229, 9, 20, 0.03) 0%, transparent 70%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(229, 9, 20, 0.2);
            animation: pulse 2s infinite;
        }

        .hero h1 {
            font-size: 2.8rem;
            color: var(--dark);
            line-height: 1.25;
            margin-bottom: 24px;
            font-weight: 800;
        }

        .hero p {
            font-size: 1.2rem;
            color: var(--text-light);
            margin-bottom: 40px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-btn-group {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .hero-btn-primary {
            background-color: var(--primary);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(229, 9, 20, 0.4);
        }

        .hero-btn-primary:hover {
            background-color: var(--primary-hover);
        }

        /* 数据指标卡片 */
        .stats-section {
            background-color: var(--dark);
            color: #ffffff;
            padding: 50px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .stat-item h3 {
            font-size: 2.5rem;
            color: var(--primary);
            font-weight: 800;
            margin-bottom: 5px;
        }

        .stat-item p {
            color: #a0aec0;
            font-size: 0.95rem;
        }

        /* 服务能力卡片 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

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

        .card {
            background-color: #ffffff;
            border-radius: 8px;
            padding: 30px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
            border-color: rgba(229, 9, 20, 0.3);
        }

        .card-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 20px;
            display: inline-block;
        }

        .card h3 {
            font-size: 1.25rem;
            color: var(--dark);
            margin-bottom: 15px;
            font-weight: 700;
        }

        .card p {
            color: var(--text-light);
            font-size: 0.95rem;
        }

        /* 平台支持徽章云 */
        .platform-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 30px;
        }

        .platform-tag {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            color: var(--text-dark);
            padding: 8px 18px;
            border-radius: 4px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
        }

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

        /* 流程步骤 */
        .process-flow {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin-top: 40px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .process-flow::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 50px;
            right: 50px;
            height: 2px;
            background-color: var(--border-color);
            z-index: 1;
        }

        .process-step {
            flex: 1;
            min-width: 200px;
            text-align: center;
            position: relative;
            z-index: 2;
            background-color: #ffffff;
            padding: 20px;
            border-radius: 8px;
        }

        .step-num {
            width: 45px;
            height: 45px;
            background-color: var(--primary);
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 15px auto;
            border: 4px solid #ffffff;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }

        /* 技术标准 */
        .tech-standards-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            align-items: center;
        }

        .tech-list {
            list-style: none;
        }

        .tech-list li {
            position: relative;
            padding-left: 30px;
            margin-bottom: 20px;
            font-size: 1.05rem;
        }

        .tech-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            top: 0;
            color: var(--primary);
            font-weight: 900;
            font-size: 1.2rem;
        }

        /* 对比评测表格 */
        .comparison-table-wrapper {
            overflow-x: auto;
            background-color: #ffffff;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
            border: 1px solid var(--border-color);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

        .comparison-table th, .comparison-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            background-color: #fcfcfc;
            color: var(--dark);
            font-weight: 700;
        }

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

        .comparison-table td strong.highlight {
            color: var(--primary);
        }

        .badge-star {
            display: inline-block;
            background-color: #fffaf0;
            color: #dd6b20;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.85rem;
            font-weight: 600;
            border: 1px solid #fbd38d;
        }

        /* 案例展示 */
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .gallery-item {
            background-color: #ffffff;
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .gallery-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.08);
        }

        .gallery-img-box {
            position: relative;
            overflow: hidden;
            background-color: var(--light-gray);
            aspect-ratio: 16 / 10;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .gallery-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .gallery-info {
            padding: 20px;
        }

        .gallery-info h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--dark);
        }

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

        /* 培训课程板块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
        }

        .training-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 20px;
            text-align: center;
            transition: var(--transition);
        }

        .training-card:hover {
            border-color: var(--primary);
            background-color: var(--primary-light);
            transform: translateY(-3px);
        }

        .training-card h4 {
            font-size: 1rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .training-card p {
            font-size: 0.85rem;
            color: var(--text-light);
        }

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

        .comment-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 30px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

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

        .comment-avatar {
            width: 45px;
            height: 45px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }

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

        .comment-meta p {
            font-size: 0.8rem;
            color: var(--text-light);
        }

        .comment-content {
            font-size: 0.9rem;
            color: var(--text-dark);
            line-height: 1.5;
        }

        /* 帮助中心与FAQ */
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .faq-item {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.2rem;
            color: var(--primary);
            transition: var(--transition);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        .faq-item.active .faq-answer {
            padding: 0 24px 20px 24px;
            max-height: 300px;
        }

        /* 术语百科与排查 */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

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

        .form-box {
            background-color: #ffffff;
            padding: 40px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            outline: none;
            transition: var(--transition);
            font-family: inherit;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(229, 9, 20, 0.1);
        }

        .contact-info-box {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .info-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 24px;
            display: flex;
            gap: 15px;
        }

        .info-card-icon {
            font-size: 1.5rem;
            color: var(--primary);
        }

        .info-card-text h4 {
            font-size: 1.05rem;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .info-card-text p, .info-card-text a {
            font-size: 0.9rem;
            color: var(--text-light);
            text-decoration: none;
        }

        .qr-codes {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 10px;
        }

        .qr-item {
            text-align: center;
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            padding: 15px;
            border-radius: 6px;
        }

        .qr-item img {
            max-width: 100%;
            height: auto;
            border-radius: 4px;
        }

        .qr-item p {
            margin-top: 8px;
            font-size: 0.8rem;
            color: var(--text-dark);
            font-weight: 600;
        }

        /* 资讯与友情链接 */
        .footer-links-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .footer-col h4 {
            color: #ffffff;
            margin-bottom: 20px;
            font-size: 1.05rem;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background-color: var(--primary);
        }

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

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

        .footer-col ul li a {
            color: #a0aec0;
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 15px;
        }

        .friend-links a {
            color: #a0aec0;
            text-decoration: none;
            font-size: 0.85rem;
            background-color: rgba(255,255,255,0.05);
            padding: 4px 10px;
            border-radius: 4px;
            transition: var(--transition);
        }

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

        /* 底部页脚 */
        footer {
            background-color: var(--dark);
            color: #ffffff;
            padding: 60px 0 30px 0;
        }

        .footer-bottom {
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: #a0aec0;
            flex-wrap: wrap;
            gap: 15px;
        }

        .footer-bottom a {
            color: #a0aec0;
            text-decoration: none;
        }

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

        /* 浮动工具栏 */
        .floating-contact {
            position: fixed;
            right: 20px;
            bottom: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
            transition: var(--transition);
            text-decoration: none;
            position: relative;
        }

        .float-btn:hover {
            transform: scale(1.05);
            background-color: var(--primary-hover);
        }

        .float-btn .tooltip {
            position: absolute;
            right: 60px;
            background-color: var(--dark);
            color: #ffffff;
            padding: 8px 12px;
            border-radius: 4px;
            font-size: 0.85rem;
            white-space: nowrap;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .float-btn:hover .tooltip {
            opacity: 1;
            visibility: visible;
        }

        .float-btn .qr-tooltip {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            padding: 10px;
            border-radius: 6px;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            width: 120px;
        }

        .float-btn:hover .qr-tooltip {
            opacity: 1;
            visibility: visible;
        }

        .float-btn .qr-tooltip img {
            width: 100%;
            height: auto;
        }

        /* 动画关键帧 */
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.03); }
            100% { transform: scale(1); }
        }

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .grid-3, .gallery-grid, .comments-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: #ffffff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3, .gallery-grid, .comments-grid, .grid-2, .contact-layout, .tech-standards-grid {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .training-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-flow::before {
                display: none;
            }
            .process-step {
                min-width: 100%;
            }
            .footer-links-grid {
                grid-template-columns: 1fr;
            }
        }