/* 全局重置与基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft Yahei', sans-serif;
        }

        :root {
            /* 配色方案 - 科技蓝为主，适配主机销售场景 */
            --primary: #165DFF;
            --primary-light: #4080FF;
            --primary-dark: #0E42D2;
            --secondary: #0FC6C2;
            --accent: #FF7D00;
            --text-main: #333;
            --text-secondary: #666;
            --text-light: #fff;
            --bg-main: #F5F7FA;
            --bg-card: #fff;
            --border-light: #E5E6EB;
            --border-hover: #165DFF;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.12);
            /* 新增导航栏专属变量 */
            --nav-height: 88px;
            --nav-shadow: 0 2px 18px rgba(22, 93, 255, 0.08);
            --nav-hover-bg: rgba(22, 93, 255, 0.03);
        }

        body {
            background-color: var(--bg-main);
            color: var(--text-main);
            line-height: 1.6;
            width: 100%;
            overflow-x: hidden;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            position: relative;
            left: 0;
            right: 0;
        }

        /* 头部导航样式 - 核心优化 */
        .header {
            background-color: var(--bg-card);
            box-shadow: var(--nav-shadow); /* 更细腻的阴影 */
            position: sticky;
            top: 0;
            z-index: 999;
            width: 100%;
            /* 新增：导航栏顶部加1px渐变边框，提升精致感 */
            border-top: 3px solid var(--primary);
            /* 新增：轻微的背景渐变 */
            background: linear-gradient(to bottom, #ffffff, #fafbff);
        }

        .menu_nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: var(--nav-height); /* 统一高度变量 */
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px; /* 更宽松的内边距 */
        }

        .logo10isp img {
            height: 48px; /* 放大logo，更醒目 */
            width: auto;
            /* 新增：logo hover效果 */
            transition: transform 0.3s ease;
        }

        .logo10isp img:hover {
            transform: scale(1.03);
        }

        .nav-list {
            display: flex;
            list-style: none;
            gap: 36px; /* 增大间距，更舒展 */
            align-items: center; /* 垂直居中 */
        }

        .nav-item {
            position: relative;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            /* 新增：导航项内边距，扩大点击区域 */
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.3s ease;
        }

        /* 新增：导航项hover背景 */
        .nav-item:hover {
            background-color: var(--nav-hover-bg);
        }

        .nav-item a {
            color: var(--text-main);
            text-decoration: none;
            transition: color 0.3s ease;
            /* 新增：文字间距，更易读 */
            letter-spacing: 0.5px;
        }

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

        /* 优化：当前选中/推荐项样式 */
        .chaojifwq {
            color: var(--primary);
            font-weight: 600; /* 加粗 */
            position: relative;
            /* 继承hover背景 */
            background-color: var(--nav-hover-bg);
        }

        /* 新增：选中项底部指示线 */
        .chaojifwq::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background-color: var(--primary);
            border-radius: 3px;
        }

        .tuijians {
            position: absolute;
            top: -10px; /* 调整位置，更协调 */
            right: -28px;
            background-color: var(--accent);
            color: var(--text-light);
            font-size: 11px; /* 缩小标签，更精致 */
            padding: 3px 8px;
            border-radius: 12px; /* 圆角标签 */
            font-weight: 600;
            /* 新增：标签阴影 */
            box-shadow: 0 2px 6px rgba(255, 125, 0, 0.2);
        }

        /* 优化：登录按钮样式，突出CTA */
        .nav-item:last-child {
            background-color: var(--primary);
            padding: 10px 20px;
            border-radius: 8px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(22, 93, 255, 0.15);
        }

        .nav-item:last-child a {
            color: var(--text-light);
            font-weight: 600;
        }

        .nav-item:last-child:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(22, 93, 255, 0.2);
        }

        /* 横幅区域样式（不变） */
        .banner {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: var(--text-light);
            padding: 60px 0;
            text-align: center;
            border-radius: 8px;
            margin: 20px auto;
            max-width: 1200px;
            width: calc(100% - 40px);
        }

        .paoti3 a {
            color: var(--text-light);
            text-decoration: none;
            font-size: 18px;
            margin-bottom: 10px;
            display: block;
        }

        .paoti2 {
            font-size: 36px;
            font-weight: 700;
            margin: 15px 0;
            letter-spacing: 1px;
        }

        .paoti4 {
            font-size: 18px;
            background-color: rgba(255, 255, 255, 0.2);
            padding: 10px 20px;
            border-radius: 4px;
            display: inline-block;
        }

        /* 产品板块通用样式（不变） */
        .product-section {
            margin: 60px auto;
            max-width: 1200px;
            width: calc(100% - 40px);
        }

        .yun_list_name {
            font-size: 28px;
            color: var(--primary-dark);
            text-align: center;
            margin-bottom: 40px;
            position: relative;
        }

        .yun_list_name::after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background-color: var(--primary);
            margin: 10px auto 0;
            border-radius: 2px;
        }

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

        .yun_list {
            background-color: var(--bg-card);
            border-radius: 12px;
            padding: 24px;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            min-height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .yun_list:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-hover);
        }

        .yun_cpbt {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary-dark);
            display: block;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-light);
        }

        .yun_nr ul {
            list-style: none;
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .yun_nr li {
            display: flex;
            justify-content: space-between;
            padding: 8px 0;
            border-bottom: 1px dashed var(--border-light);
            font-size: 14px;
        }

        .yun_nr li span:first-child {
            color: var(--text-secondary);
            font-weight: 500;
        }

        .yun_nr li font {
            color: var(--text-main);
        }

        .jiage_bg {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            text-align: center;
            padding: 12px;
            background-color: var(--primary-light);
            color: var(--text-light);
            border-radius: 8px;
            font-size: 18px;
            font-weight: 600;
            width: 100%;
            flex-wrap: wrap;
        }

        .jiage_bg .price-text {
            white-space: nowrap;
        }

        .jiage_bg a {
            color: var(--text-light);
            text-decoration: none;
            background-color: var(--accent);
            padding: 6px 12px;
            border-radius: 4px;
            transition: background-color 0.3s ease;
            min-width: 80px;
            display: inline-block;
            white-space: nowrap;
        }

        .jiage_bg a:hover {
            background-color: #e67000;
        }

        /* 产品优势板块样式（不变） */
        .advantage-section {
            background-color: var(--bg-card);
            padding: 60px 0;
            margin: 60px auto;
            border-radius: 12px;
            box-shadow: var(--shadow);
            max-width: 1200px;
            width: calc(100% - 40px);
        }

        .advantage-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            padding: 0 20px;
        }

        .advantage-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px;
            border-radius: 8px;
            transition: background-color 0.3s ease;
        }

        .advantage-item:hover {
            background-color: var(--bg-main);
        }

        .advantage-item img {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
        }

        .advantage-item h3 {
            color: var(--primary-dark);
            font-size: 18px;
            margin-bottom: 8px;
        }

        .advantage-item p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.5;
        }

        /* 页脚样式（不变） */
        .footer {
            background-color: var(--primary-dark);
            color: var(--text-light);
            padding: 30px 0;
            text-align: center;
            margin-top: 40px;
            width: 100%;
        }

        .footer2 {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .footer2 a {
            color: var(--secondary);
            text-decoration: none;
        }

        .footer2 a:hover {
            text-decoration: underline;
        }

        /* 响应式适配（补充导航栏适配） */
        @media (max-width: 768px) {
            .yun_jiqi {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            
            .menu_nav {
                flex-direction: column;
                height: auto;
                padding: 20px 0;
            }

            .nav-list {
                flex-wrap: wrap;
                justify-content: center;
                gap: 15px;
                margin-top: 15px;
            }

            /* 响应式下取消导航栏特殊样式 */
            .chaojifwq::after {
                display: none;
            }

            .nav-item:last-child {
                margin-top: 8px;
                width: 100%;
                text-align: center;
            }

            .banner {
                padding: 40px 0;
                width: calc(100% - 40px);
            }

            .paoti2 {
                font-size: 28px;
            }

            .yun_list_name {
                font-size: 24px;
            }

            .advantage-list {
                gap: 20px;
            }

            .jiage_bg {
                flex-direction: column;
                gap: 8px;
            }

            .jiage_bg a {
                width: 100%;
                margin-left: 0;
            }
        }

        @media (max-width: 576px) {
            .yun_jiqi {
                grid-template-columns: 1fr;
            }

            .paoti4 {
                font-size: 16px;
                padding: 8px 15px;
            }

            .jiage_bg {
                font-size: 16px;
            }
        }