/* 基础样式重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', system-ui, sans-serif;
        }
        
        body {
            padding-top: 65px;
            min-height: 200vh;
        }
        
        /* 颜色变量定义 */
        :root {
            --primary: #004DFF;
            --secondary: #7EB6FF;
            --textDark: #1A1A1A;
            --textGray: #707070;
            --highlight: #006FFF;
            --backgroundLight: #EBF2FD;
            --hot: #F64041;
            --white: #FFFFFF;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        
        /* 导航栏样式 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: var(--white);
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
            z-index: 50;
            transition: all 0.3s ease;
            height: 65px;
        }
        
        .container {
            max-width: 1440px;
            margin: 0 auto;
            padding: 0 40px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        /* Logo样式 */
        .logo-container {
            width: 163px;
            height: 100%;
            display: flex;
            align-items: center;
           
        }
        
        .logo {
            color: var(--primary);
            font-size: 24px;
            font-weight: bold;
            text-decoration: none;
        }
        
        /* 导航菜单样式 */
        nav {
            display: flex;
            align-items: center;
            gap: 32px;
    margin-left: 50px;
            margin-right: auto;
  width: 550px; /* 必须指定宽度 */
        }
        
        .nav-link {
            color: var(--textGray);
            text-decoration: none;
            position: relative;
            transition: all 0.3s ease;
        }
        
        .nav-link:hover {
            color: var(--textDark);
            font-weight: 700;
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            width: 0;
            height: 2px;
            background-color: var(--secondary);
            transition: all 0.3s ease;
            transform-origin: center;
        }
        
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
            left: 0;
        }
        
        /* 下拉菜单容器 */
        .dropdown-container {
            position: relative;
            
        }
        
        /* 下拉菜单样式 */
        .dropdown {
            position: fixed;
            top: 65px;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(4px);
            box-shadow: var(--shadow);
            height: 361px;
            opacity: 0;
            transform: scaleY(0.95);
            transform-origin: top;
            transition: all 0.3s ease;
            visibility: hidden;
            z-index: 49;
            display: flex;
        }
        
        .dropdown-container:hover .dropdown {
            opacity: 1;
            transform: scaleY(1);
            visibility: visible;
        }
        
        .dropdown-container:hover .nav-link {
            color: var(--textDark);
        }
        
        .dropdown-container:hover .nav-link::after {
            width: 100%;
            left: 0;
        }
        
        /* 左侧文本框样式 */
        .left-panel {
            width: 410px;
            height: 100%;
            background-color: var(--backgroundLight);
            display: flex;
        }
        
        .left-panel .empty-div {
            width: 40%;
            height: 100%;
        }
        
        .left-panel .content-div {
            width: 60%;
            height: 100%;
            padding: 32px;
            letter-spacing: 2px;
            line-height: 20px;
                     display: flex;
            flex-direction: column;
            justify-content: center;
     /*     */

        }
        
        .panel-title {
            font-size: 20px;
            font-weight: bold;
            color: var(--textDark);
            margin-bottom: 16px;
            text-align: left;
        }
        
        .panel-desc {
            font-size: 14px;
            color: var(--textGray);
            margin-bottom: 24px;
            text-align: left;
        }
        
        .panel-link {
            font-size: 14px;
            color: var(--highlight);
            font-weight: 500;
            text-decoration: none;
            text-align: left;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
        }
        
        .panel-link:hover {
            text-decoration: underline;
        }
        
        .panel-link::after {
            content: '→';
            margin-left: 4px;
            font-size: 12px;
        }
        
        /* 右侧子菜单样式 */
        .right-panel {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: flex-end;
            padding-right: calc((100vw - 1440px)/2 + 150px);
        }
        
        .menu-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            width: 1000px;
font-family: Source Han Sans CN, Source 
        }
        
        .menu-item {
            padding: 4px 0;
            transition: all 0.3s ease;

        }
        
        .menu-item a {
            font-size: 14px;
            color: var(--textDark);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
                        color: #363636;
          
        }
        
        .menu-item:hover a {
            color: var(--highlight);
        }
        
        .hot-tag {
            display: inline-block;
            margin-left: 8px;
            padding: 2px 6px;
            background-color: var(--hot);
            color: var(--white);
            font-size: 12px;
            border-radius: 3px;
        }
        
        /* 联系信息和免费试用样式 */
        .contact-section {
            display: flex;
            align-items: center;
            gap: 32px;
            margin-left: auto;

                 position: absolute;
  right: 0; /* 靠右对齐 */
  top: 0;   /* 可调整垂直位置 */
        }
        
        .phone-info {
            display: flex;
            align-items: center;
            gap: 8px;

        }
        
        .phone-icon {
         
            width: 19px;
            height: 19px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        

        
        .phone-number {
          
            color: #006FFF;
        }
        
        .trial-btn {
            width: 230px;
            height: 65px;
            background-color: var(--primary);
            color: var(--white);
            border: none;
            font-weight: 500;
            cursor: pointer;
            transition: background-color 0.3s ease;
            text-decoration: none;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .trial-btn:hover {
            background-color: rgba(0, 77, 255, 0.9);
        }
        
        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--textGray);
            font-size: 24px;
            cursor: pointer;
        }
        

.mobile-menu {
    display: none;
    height: 0;
    overflow: hidden;
    transition: height 0.3s ease;
    background-color: var(--white); /* 增加背景色 */
    box-shadow: var(--shadow); /* 增加阴影 */
}

/* 移动端菜单内容样式 */
.mobile-menu .menu-items {
    padding: 20px 40px; /* 内边距 */
    border-bottom: 1px solid #f0f0f0; /* 分隔线 */
}

.mobile-menu .menu-items a {
    display: block; /* 块级显示，占满一行 */
    padding: 12px 0; /* 上下间距 */
    color: var(--textGray); /* 文字颜色 */
    text-decoration: none; /* 去除下划线 */
    border-bottom: 1px solid #f5f5f5; /* 链接分隔线 */
}

.mobile-menu .menu-items a:last-child {
    border-bottom: none; /* 最后一个链接无分隔线 */
}

.mobile-menu .menu-items a:hover {
    color: var(--primary); /*  hover 颜色 */
}

/* 移动端联系信息样式 */
.mobile-menu .contact-info {
    padding: 20px 40px;
}

.mobile-menu .phone-item {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px; /* 与按钮间距 */
}

.mobile-menu .mobile-trial-btn {
    display: block; /* 块级显示 */
    width: 100%; /* 占满宽度 */
    height: 48px; /* 按钮高度 */
    line-height: 48px; /* 文字垂直居中 */
    text-align: center; /* 文字水平居中 */
    background-color: var(--primary);
    color: var(--white);
    text-decoration: none;
    border-radius: 4px; /* 圆角 */
}

/* 响应式样式调整 */
@media (max-width: 768px) {
    nav, .contact-section {
        display: none; /* 隐藏桌面版导航 */
    }
    
    .mobile-menu-btn {
        display: block; /* 显示移动端按钮 */
    }
    
    .mobile-menu {
        display: block; /* 显示移动端菜单容器 */
    }

    /* 容器内边距调整（适配手机屏幕） */
    .container {
        padding: 0 20px; /* 减小内边距 */
    }
}
        
        /* 自定义图标 */
        .icon {
            display: inline-block;
            width: 1em;
            height: 1em;
            position: relative;
        }
        
        .icon-bars::before {
            content: '≡';
            font-size: 1.2em;
        }
        
        .icon-times::before {
            content: '×';
            font-size: 1.2em;
        }