/* 基础样式 */
        :root {
            --primary-blue: #1A365F;
            --accent-blue: #4F97D9;
            --dark-bg: #0A1A2F;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', sans-serif;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: 100px;
        }
        body {
            background: var(--dark-bg);
            color: #E0E7F0;
            line-height: 1.8;
        }
		

        /* 导航栏 */
        .nav-logo {
            width: 180px;
            margin-right: 50px;
        }
        .nav-link {
            color: #fff;
            text-decoration: none;
            padding: 12px 25px;
            transition: all 0.3s;
            border-radius: 5px;
        }
        .nav-link:hover {
            background: rgba(79,151,217,0.2);
        }

       

        /* 内容区块 */
        .content-section {
            padding: 120px 10% 80px;
            min-height: 100vh;
        }
        .section-title {
            font-size: 2.5rem;
            margin-bottom: 50px;
            color: var(--accent-blue);
            position: relative;
            padding-left: 25px;
        }
        .section-title::before {
            content: "";
            position: absolute;
            left: 0;
            top: 15%;
            height: 70%;
            width: 5px;
            background: var(--accent-blue);
        }

        /* 双栏布局 */
        .grid-2col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .content-img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }

        /* 产品卡片 */
        .product-card {
            background: #11253E;
            padding: 30px;
            border-radius: 10px;
            margin-bottom: 30px;
            border: 1px solid #2E5894; 
        }
		.product-card a{ 
            padding: 10px;
            border-radius: 10px;
            margin-bottom: 10px;
            border: 1px solid #2E5894; color:#FFFFFF; text-decoration:none; }

        /* 网站尾部 */
        .main-footer {
            background: #081220;
            padding: 60px 10%;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
        }
		.product-card {
    padding: 20px;
    border-radius: 12px;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(224, 231, 255, 0.4);
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.industry-link {
    color: #2d3748;
    padding: 10px 15px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    display: block;
}

/* 自定义Tooltip */
.custom-tooltip {
    visibility: hidden;
    opacity: 0;
    width: 220px;
    background: rgba(39, 45, 62, 0.95); /* 深色半透明背景 */
    backdrop-filter: blur(8px);
    color: #f8fafc;
    padding: 12px;
    border-radius: 6px;
    position: absolute;
    z-index: 1;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    transition: opacity 0.2s;
    font-size: 0.9em;
    line-height: 1.5;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Tooltip箭头 */
.custom-tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 6px;
    border-style: solid;
    border-color: rgba(39, 45, 62, 0.95) transparent transparent transparent;
}

.industry-link:hover .custom-tooltip {
    visibility: visible;
    opacity: 1;
}

/* 悬停动效 */
.industry-link:hover {
    background: rgba(226, 232, 240, 0.4);
    transform: translateX(8px);
}

/* 适配移动端 */
@media (max-width: 768px) {
    .custom-tooltip {
        width: 180px;
        font-size: 0.85em;
    }
}