:root {
            --primary: #00a8ff;
            --secondary: #192a56;
            --dark: #0c1427;
            --light: #f5f6fa;
            --accent: #9c88ff;
            --card-bg: rgba(255, 255, 255, 0.03);
            --card-hover: rgba(255, 255, 255, 0.07);
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Arial, sans-serif;
            -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--dark);
            color: var(--light);
            line-height: 1.6;
            overflow-x: hidden;
        }
        /* 滚动条样式 */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--secondary);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 4px;
            transition: background 0.3s ease;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent);
        }
        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
        }

        section {
            padding: 120px 0;
            position: relative;
        }

        .section-title {
            text-align: center;
            margin-bottom: 80px;
            position: relative;
        }

        .section-title h2 {
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 20px;
            display: inline-block;
            position: relative;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .section-title h2::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            bottom: -12px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 3px;
        }

        .section-title p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 700px;
            margin: 0 auto;
        }

       
        /* 关于我们头部区域 */
        .about-header {
            height: 70vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding-top: 80px;
        }

        .about-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(12, 20, 39, 0.95) 0%, rgba(25, 42, 86, 0.9) 100%);
            z-index: -1;
        }

        .about-header-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -2;
            background: url('https://images.unsplash.com/photo-1518173835740-f5d14111d76a?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2024&q=80') no-repeat center center/cover;
            filter: brightness(0.4);
        }

        /* 粒子背景效果 - 修复：确保粒子样式生效 */
        .particle-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }
        .particle {
            position: absolute;
            border-radius: 50%;
            background: rgba(0, 168, 255, 0.15);
            animation: float 8s infinite ease-in-out;
        }
        @keyframes float {
            0%, 100% {
                transform: translateY(0) translateX(0) rotate(0deg);
                opacity: 0.6;
            }
            50% {
                transform: translateY(-30px) translateX(15px) rotate(10deg);
                opacity: 0.9;
            }
        }
        .about-header-content {
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .about-header h1 {
            font-size: 4rem;
            font-weight: 800;
            margin-bottom: 25px;
            line-height: 1.2;
            background: linear-gradient(90deg, var(--light), var(--primary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 1s 0.3s forwards;
        }
        .about-header p {
            font-size: 1.3rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 40px;
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 1s 0.6s forwards;
        }
        .stats-row {
            display: flex;
            justify-content: center;
            gap: 50px;
            flex-wrap: wrap;
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 1s 0.9s forwards;
        }
        .stat-item {
            text-align: center;
            min-width: 150px;
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
            position: relative;
        }
        .stat-label {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.7);
        }
        /* 公司简介模块 */
        .company-intro {
            background-color: var(--secondary);
        }

        .intro-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .intro-text {
            padding-right: 20px;
        }

        .intro-text h3 {
            font-size: 2rem;
            margin-bottom: 25px;
            color: var(--light);
            position: relative;
            padding-left: 20px;
        }

        .intro-text h3::before {
            content: '';
            position: absolute;
            left: 0;
            top: 5px;
            height: 80%;
            width: 4px;
            background: linear-gradient(180deg, var(--primary), var(--accent));
            border-radius: 2px;
        }

        .intro-text p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 20px;
            line-height: 1.8;
        }

        .intro-highlights {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin: 30px 0;
        }

        .highlight-item {
            display: flex;
            align-items: center;
            gap: 15px;
            padding: 15px;
            background: var(--card-bg);
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .highlight-item:hover {
            background: var(--card-hover);
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }

        .highlight-icon {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: rgba(0, 168, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .highlight-text h4 {
            font-size: 1.1rem;
            margin-bottom: 5px;
            color: var(--light);
        }

        .highlight-text p {
            font-size: 0.95rem;
            margin-bottom: 0;
            color: rgba(255, 255, 255, 0.6);
        }

        .intro-image {
            position: relative;
            height: 500px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .intro-image::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, rgba(0, 168, 255, 0.2), rgba(156, 136, 255, 0.2));
            z-index: 1;
        }

        .intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 7s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .intro-image:hover img {
            transform: scale(1.15);
        }

        .intro-shape {
            position: absolute;
            width: 200px;
            height: 200px;
            border: 2px dashed var(--primary);
            border-radius: 50%;
            bottom: -50px;
            right: -50px;
            z-index: 0;
            animation: rotate 20s infinite linear;
            opacity: 0.3;
        }

        @keyframes rotate {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }

        /* 企业资质模块（优化：仅展示图片） */
        .qualifications {
            background-color: var(--dark);
        }

        .qualifications-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
        }

        .qualification-card {
            height: 400px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            position: relative;
            transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
        }

        .qualification-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, transparent 60%, rgba(12, 20, 39, 0.8) 100%);
            z-index: 1;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .qualification-card:hover {
            transform: translateY(-10px) scale(1.02);
            box-shadow: 0 20px 40px rgba(0, 168, 255, 0.2);
        }

        .qualification-card:hover::before {
            opacity: 1;
        }

        .qualification-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .qualification-card:hover .qualification-img {
            transform: scale(1.1);
        }

        .qualification-caption {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            padding: 25px;
            z-index: 2;
            transform: translateY(30px);
            opacity: 0;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .qualification-card:hover .qualification-caption {
            transform: translateY(0);
            opacity: 1;
        }

        .qualification-caption h3 {
            font-size: 1.5rem;
            margin-bottom: 8px;
            color: var(--light);
        }

        .qualification-caption p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
        }

        /* 合作单位模块 - 修复：图片完整显示 */
       /* 1. 合作单位模块：删除轮播，改用网格布局 */
.partners {
    background-color: var(--secondary);
}

/* 移除轮播导航按钮（无需轮播） */
.slider-nav {
    display: none;
}
.partners .container{
    max-width: 1500px;
    width: 100%;
}
/* 合作单位模块 - 优化版：固定宽高+无阴影+简化动态 */
.partners {
    background-color: var(--secondary);
    padding: 120px 0; /* 与其他模块统一padding */
}

/* 移除轮播相关元素（无需轮播） */
.slider-nav {
    display: none;
}

/* 网格容器：控制卡片排列，保持响应式 */
.partners .container {
    max-width: 1500px;
    width: 90%;
    margin: 0 auto;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); /* 自适应列数，最小宽度匹配图片宽 */
    gap: 40px; 
    padding: 20px 0;
}

/* 卡片容器：取消入场动画，保持静态基础样式 */
.partner-card {
    min-width: auto;
    height: auto;
    padding: 0;
    opacity: 1; /* 取消初始透明 */

}

/* 图片容器：核心样式 - 固定宽高+无阴影 */
.partner-logo {
    width: 200px; /* 固定宽度 */
    height: 120px; /* 固定高度，根据需求调整 */
    background: var(--card-bg); /* 保留背景色，与整体风格统一 */
    border-radius: 8px; /* 轻微圆角，避免生硬 */
    padding: 20px; /* 内边距，防止图片贴边 */
    margin: 0 auto; /* 水平居中，确保卡片整齐 */
    transition: opacity 0.3s ease; /* 简化动态：仅透明度变化 */
    opacity: 0.85; /* 初始轻微透明 */
    box-shadow: none; /* 完全移除阴影 */
}

/* 简化hover效果：仅恢复不透明，无放大/旋转 */
.partner-card:hover .partner-logo {
    opacity: 1; /* hover时恢复完全不透明 */
    transform: none; /* 取消放大/旋转 */
    background: var(--card-bg); /* 保持背景色不变，避免额外变化 */
    filter: grayscale(0); /* 可选：取消灰度，恢复图片色彩（如需保留灰度可删除） */
}

/* 图片显示：确保固定宽高下完整展示，不拉伸 */
.partner-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* 按比例缩放，完整显示图片 */
    object-position: center; /* 图片居中 */
}

/* 响应式适配：不同屏幕保持图片固定宽高，调整列数 */
@media (max-width: 992px) {
    .partners-grid {
        grid-template-columns: repeat(3, 1fr); /* 中屏：3列 */
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .partners-grid {
        grid-template-columns: repeat(2, 1fr); /* 小屏：2列 */
    }
}

@media (max-width: 576px) {
    .partners {
        padding: 80px 0; /* 移动端减少上下padding */
    }
    .partners-grid {
        grid-template-columns: 1fr; /* 移动端：1列 */
        gap: 25px;
    }
    .partner-logo {
        width: 180px; /* 移动端轻微缩小图片宽度 */
        height: 100px; /* 同步缩小高度，保持比例 */
    }
}

        .slider-nav {
            position: absolute;
            top: 50%;
            left: 0;
            width: 100%;
            display: flex;
            justify-content: space-between;
            transform: translateY(-50%);
            z-index: 10;
            padding: 0 15px;
        }

        .slider-btn {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: rgba(0, 168, 255, 0.2);
            border: 1px solid var(--primary);
            color: var(--primary);
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            backdrop-filter: blur(5px);
        }

        .slider-btn:hover {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            transform: scale(1.1);
        }

        .slider-btn:disabled {
            opacity: 0.3;
            cursor: not-allowed;
            transform: none;
            background: rgba(0, 168, 255, 0.1);
            color: var(--primary);
        }

        /* 页脚样式 */
        footer {
            background: var(--dark);
            padding: 70px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-column h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
            color: var(--light);
        }

        .footer-column h3::after {
            content: '';
            position: absolute;
            width: 40px;
            height: 2px;
            background: var(--primary);
            bottom: 0;
            left: 0;
        }

        .footer-column p {
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }
         .footer-column img {
             width: 100px;
             height: 100px;
         }
        .footer-links {
            list-style: none;
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: all 0.3s ease;
            font-size: 0.95rem;
            display: inline-block;
        }

        .footer-links a:hover {
            color: var(--primary);
            transform: translateX(5px);
        }

        .copyright {
            text-align: center;
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
        }

        /* 动画效果 */
        @keyframes fadeUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .intro-content {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .intro-text {
                padding-right: 0;
                order: 1;
            }

            .intro-image {
                height: 400px;
                order: 0;
            }

            .about-header h1 {
                font-size: 3.2rem;
            }

            .stats-row {
                gap: 30px;
            }

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

        }

        @media (max-width: 768px) {
.stats-row{
    display: none;
}
            .about-header {
                height: 60vh;
            }

            .about-header h1 {
                font-size: 2.5rem;
            }

            .about-header p {
                font-size: 1.1rem;
            }

            .section-title h2 {
                font-size: 2.2rem;
            }

            .qualifications-grid {
                grid-template-columns: 1fr;
            }


        }

        @media (max-width: 576px) {
            section {
                padding: 80px 0;
            }

            .about-header {
                height: 50vh;
            }

            .about-header h1 {
                font-size: 2rem;
            }

            .stats-row {
                gap: 20px;
            }

            .stat-number {
                font-size: 2rem;
            }

            .intro-image {
                height: 300px;
            }

            .intro-highlights {
                grid-template-columns: 1fr;
            }

            .section-title {
                margin-bottom: 50px;
            }

            .section-title h2 {
                font-size: 1.8rem;
            }


        }