/* 页脚样式 */
        .footer {
            background: linear-gradient(135deg, #1a202c 0%, #2d3748 40%, #1e293b 100%);
            color: #e2e8f0;
            padding: 4rem 0 0;
            /* margin-top: 5rem; */
            position: relative;
            overflow: hidden;
        }

        /* 装饰性渐变背景 */
        .footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: 
                radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
            pointer-events: none;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.3fr;
            gap: 3rem;
            padding: 0 2rem 2rem;
            position: relative;
            z-index: 1;
        }

        /* Logo样式 */
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1rem;
        }

        .footer-logo i {
            font-size: 2rem;
            color: #667eea;
        }

        .footer-logo span {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-section p {
            color: #cbd5e0;
            line-height: 1.8;
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
        }

        .footer-section h3 {
            color: #ffffff;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
            font-weight: 700;
            position: relative;
            padding-bottom: 0.75rem;
        }

        .footer-section h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: linear-gradient(90deg, #667eea, #764ba2);
            border-radius: 2px;
        }

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

        .footer-section ul li {
            margin-bottom: 0.75rem;
            transition: transform 0.3s;
        }

        .footer-section ul li:hover {
            transform: translateX(5px);
        }

        .footer-section ul li a {
            color: #cbd5e0;
            text-decoration: none;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.95rem;
        }

        .footer-section ul li a i {
            font-size: 0.8rem;
            width: 18px;
            opacity: 0.7;
            transition: all 0.3s;
        }

        .footer-section ul li a:hover {
            color: #667eea;
        }

        .footer-section ul li a:hover i {
            opacity: 1;
            transform: translateX(3px);
        }

        /* 联系信息样式 */
        .footer-section ul li i {
            color: #667eea;
            margin-right: 0.5rem;
            font-size: 0.9rem;
            width: 20px;
            flex-shrink: 0;
        }

        .footer-section ul li span {
            color: #cbd5e0;
        }

        /* 联系信息项布局 */
        .footer-section:last-child ul li {
            display: flex;
            align-items: flex-start;
        }

        /* 友情链接区域 */
        .footer-links {
            border-top: 0.5px solid rgba(255, 255, 255, 0.1);
            padding: 1rem 2rem;
            position: relative;
            z-index: 1;
        }

        .footer-links-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        .footer-links-title {
            color: #ffffff;
            font-size: 1rem;
            font-weight: 700;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .footer-links-title i {
            color: #667eea;
            font-size: 0.9rem;
        }

        .footer-links-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            align-items: center;
            flex: 1;
        }

        .footer-links-list a {
            color: #cbd5e0;
            text-decoration: none;
            font-size: 0.9rem;
            transition: all 0.3s;
            padding: 0.25rem 0;
            position: relative;
            white-space: nowrap;
        }

        .footer-links-list a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #667eea, #764ba2);
            transition: width 0.3s;
        }

        .footer-links-list a:hover {
            color: #667eea;
        }

        .footer-links-list a:hover::after {
            width: 100%;
        }

        /* 证书颁发机构品牌展示区域 */
        .footer-brands {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 2rem;
            background: rgba(0, 0, 0, 0.15);
            position: relative;
        }

        .footer-brands-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }

        .footer-brands-title {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: #ffffff;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .footer-brands-title i {
            color: #667eea;
            font-size: 1.2rem;
        }

        .footer-brands-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 1.5rem;
            align-items: center;
        }

        .footer-brands-list a {
            color: #cbd5e0;
            text-decoration: none;
            font-size: 0.95rem;
            padding: 0.5rem 1rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 6px;
            transition: all 0.3s;
            background: rgba(255, 255, 255, 0.05);
            position: relative;
            overflow: hidden;
        }

        .footer-brands-list a::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.2), transparent);
            transition: left 0.5s;
        }

        .footer-brands-list a:hover {
            color: #667eea;
            border-color: #667eea;
            background: rgba(102, 126, 234, 0.1);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
        }

        .footer-brands-list a:hover::before {
            left: 100%;
        }

        /* 底部版权区域 */
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 0;
            padding: 1.5rem 2rem;
            text-align: center;
            background: rgba(0, 0, 0, 0.2);
            position: relative;
        }

        .footer-bottom p {
            color: #94a3b8;
            font-size: 0.9rem;
            margin: 0;
        }

        .footer-bottom a {
            color: #93c5fd;
            text-decoration: none;
            transition: all 0.3s;
            font-weight: 500;
            position: relative;
        }

        .footer-bottom a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #667eea, #764ba2);
            transition: width 0.3s;
        }

        .footer-bottom a:hover {
            color: #667eea;
        }

        .footer-bottom a:hover::after {
            width: 100%;
        }

        /* 响应式设计 */
        @media (max-width: 1024px) {
            .footer-container {
                grid-template-columns: repeat(2, 1fr);
                gap: 2rem;
            }
        }

        @media (max-width: 768px) {
            .footer {
                padding: 2.5rem 0 0;
                margin-top: 3rem;
            }

            .footer-links {
                padding: 1.25rem 1.5rem;
            }

            .footer-links-container {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }

            .footer-links-list {
                gap: 1rem;
                width: 100%;
            }

            .footer-links-list a {
                font-size: 0.85rem;
            }

            .footer-brands {
                padding: 1.5rem 1.5rem;
            }

            .footer-brands-container {
                gap: 1rem;
            }

            .footer-brands-title {
                font-size: 1rem;
            }

            .footer-brands-list {
                gap: 0.75rem 1rem;
            }

            .footer-brands-list a {
                font-size: 0.85rem;
                padding: 0.4rem 0.8rem;
            }

            .footer-container {
                display: grid;
                grid-template-columns: 1fr 1fr;
                grid-template-rows: auto auto auto;
                gap: 1.5rem;
                padding: 0 1.5rem 1.5rem;
            }

            /* Logo和描述占满一行 */
            .footer-section:nth-child(1) {
                grid-column: 1 / -1;
                grid-row: 1;
            }

            /* 产品服务和技术支持在同一行 */
            .footer-section:nth-child(2) {
                grid-column: 1;
                grid-row: 2;
            }

            .footer-section:nth-child(3) {
                grid-column: 2;
                grid-row: 2;
            }

            /* 联系我们占满一行 */
            .footer-section:nth-child(4) {
                grid-column: 1 / -1;
                grid-row: 3;
            }

            .footer-logo {
                margin-bottom: 0.75rem;
            }

            .footer-logo i {
                font-size: 1.5rem;
            }

            .footer-logo span {
                font-size: 1.3rem;
            }

            .footer-section {
                width: 100%;
                max-width: 100%;
                box-sizing: border-box;
            }

            .footer-section p {
                font-size: 0.9rem;
                line-height: 1.7;
                margin-bottom: 1rem;
            }

            .footer-section h3 {
                font-size: 1.1rem;
                margin-bottom: 1rem;
                padding-bottom: 0.5rem;
            }

            .footer-section ul li {
                margin-bottom: 0.6rem;
            }

            .footer-section ul li a {
                font-size: 0.9rem;
            }

            .footer-section ul li span {
                font-size: 0.9rem;
                word-break: break-word;
                line-height: 1.6;
                flex: 1;
            }

            .footer-section:last-child ul li {
                align-items: flex-start;
            }

            .footer-section:last-child ul li i {
                margin-top: 2px;
            }

            .footer-bottom {
                padding: 1rem 1.5rem;
                margin-top: 1.5rem;
            }

            .footer-bottom p {
                font-size: 0.85rem;
                line-height: 1.6;
                word-break: break-word;
            }
        }

        @media (max-width: 480px) {
            .footer {
                padding: 2rem 0 0;
                margin-top: 2.5rem;
            }

            .footer-links {
                padding: 1rem;
            }

            .footer-links-title {
                font-size: 0.9rem;
            }

            .footer-links-list {
                gap: 0.75rem;
            }

            .footer-links-list a {
                font-size: 0.8rem;
            }

            .footer-brands {
                padding: 1.25rem 1rem;
            }

            .footer-brands-title {
                font-size: 0.9rem;
            }

            .footer-brands-list {
                gap: 0.5rem 0.75rem;
            }

            .footer-brands-list a {
                font-size: 0.8rem;
                padding: 0.35rem 0.7rem;
            }

            .footer-container {
                padding: 0 1rem 1.25rem;
                gap: 1rem;
                grid-template-columns: 1fr 1fr;
            }

            .footer-logo {
                margin-bottom: 0.5rem;
            }

            .footer-logo i {
                font-size: 1.3rem;
            }

            .footer-logo span {
                font-size: 1.2rem;
            }

            .footer-section p {
                font-size: 0.85rem;
                line-height: 1.6;
                margin-bottom: 0.75rem;
            }

            .footer-section h3 {
                font-size: 1rem;
                margin-bottom: 0.75rem;
                padding-bottom: 0.5rem;
            }

            .footer-section h3::after {
                width: 30px;
                height: 2px;
            }

            .footer-section ul li {
                margin-bottom: 0.5rem;
            }

            .footer-section ul li a {
                font-size: 0.85rem;
            }

            .footer-section ul li a i {
                font-size: 0.75rem;
                width: 16px;
            }

            .footer-section ul li i {
                font-size: 0.8rem;
                width: 18px;
            }

            .footer-section ul li span {
                font-size: 0.85rem;
                flex: 1;
                word-break: break-word;
                line-height: 1.6;
            }

            .footer-section:last-child ul li {
                align-items: flex-start;
            }

            .footer-section:last-child ul li i {
                margin-top: 2px;
            }

            .footer-bottom {
                padding: 0.875rem 1rem;
                margin-top: 1.25rem;
            }

            .footer-bottom p {
                font-size: 0.8rem;
                line-height: 1.8;
            }

            .footer-bottom a {
                display: inline-block;
                margin: 0 2px;
            }
        }