@media screen and (max-width: 768px) {
    #topNav{
        display: none !important;
    }
    .mobile-nav-mask{
        opacity: 0;
        pointer-events: none;
    }
  
    .moblie-nav{
        display: block;
        position: static;
    }
    .mobile-nav-content{
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 70px;
        z-index: 999;
    }
    .mobile-nav-header{
        height: 70px;
        background: #fff;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 20px;
        border-bottom: 1px solid #efefef;
        box-shadow: 0 10px 10px rgba(0,0,0,0.1);
    }
    .mobile-nav-logo img {
        max-height: 40px;
    }
    .mobile-nav-right span{
        display: block;
        width: 30px;
        height: 3px;
        background: #333;
        border-radius: 3px;
        margin-bottom: 5px;
    }
    .mobile-nav-list{
        display: none;
        height: calc( 100vh - 68px);
        background-color: #fff;
        width: 70%;
        position: absolute;
        top: 69px;
        right: -1px;
        box-shadow: -10px 0 10px rgba(0,0,0,0.1);
    }
    .moblie-nav .mobile-nav-item{
        padding:10px 20px;
    }
    /**
     * 移动端导航优化
     */
    /* 移动端导航按钮动画 */   
     .mobile-nav-right {
        cursor: pointer;
        transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    }
    
    .mobile-nav-right span {
        transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    }
    
    .mobile-nav-right.active {
        transform: rotate(45deg);
    }
    
    .mobile-nav-right.active span:nth-child(1) {
        transform: rotate(0deg) translateY(7px);
        background-color: #333;
    }
    
    .mobile-nav-right.active span:nth-child(2) {
        opacity: 0;
        transform: translateX(-20px);
    }
    
    .mobile-nav-right.active span:nth-child(3) {
        transform: rotate(90deg) translateX(-7px);
        background-color: #333;
    }
    
    /* 导航菜单滑入动画 */
    .mobile-nav-list {
        transform: translateX(100%);
        opacity: 0;
        transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s ease;
        max-height: calc(100vh - 68px);
        overflow-y: auto;
    }
    
    .mobile-nav-list.show {
        display: block;
        transform: translateX(0);
        opacity: 1;
    }
    
    /* 菜单项依次出现动画 */
    .mobile-nav-list .mobile-nav-item {
        opacity: 0;
        transform: translateX(20px);
        transition: opacity 0.3s ease, transform 0.3s ease;
        position: relative;
    }
    
    .mobile-nav-list.show .mobile-nav-item {
        opacity: 1;
        transform: translateX(0);
    }
    
    /* 为每个菜单项添加延迟动画 */
    .mobile-nav-list.show .mobile-nav-item:nth-child(1) { transition-delay: 0.05s; }
    .mobile-nav-list.show .mobile-nav-item:nth-child(2) { transition-delay: 0.1s; }
    .mobile-nav-list.show .mobile-nav-item:nth-child(3) { transition-delay: 0.15s; }
    .mobile-nav-list.show .mobile-nav-item:nth-child(4) { transition-delay: 0.2s; }
    .mobile-nav-list.show .mobile-nav-item:nth-child(5) { transition-delay: 0.25s; }
    .mobile-nav-list.show .mobile-nav-item:nth-child(6) { transition-delay: 0.3s; }
    .mobile-nav-list.show .mobile-nav-item:nth-child(7) { transition-delay: 0.35s; }
    
    /* 菜单项悬停效果 */
    .mobile-nav-list .mobile-nav-item:hover {
        background-color: rgba(255, 255, 255, 0.1);
        transform: translateX(5px);
    }
    
    .mobile-nav-link {
        color: #333;
        text-decoration: none;
        display: block;
        transition: color 0.3s ease, padding-left 0.3s ease;
    }
    
    .mobile-nav-item:hover .mobile-nav-link {
        
        padding-left: 5px;
    }
    
    /* 子菜单展开/收起动画 */
    .mobile-subNav {
        opacity: 0;
        max-height: 0;
        overflow: hidden;
        transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        padding-left: 20px;
    }
    
    .mobile-nav-item.on .mobile-subNav {
        opacity: 1;
        max-height: 500px;
    }
    
    .mobile-subNav .mobile-nav-item {
        transform: translateX(0) !important;
    }
    
    /* 子菜单项动画 */
    .mobile-subNav .mobile-nav-item {
        opacity: 0;
        transform: translateX(10px);
        transition: opacity 0.3s ease, transform 0.3s ease;
    }
    
    .mobile-nav-item.on .mobile-subNav .mobile-nav-item {
        opacity: 1;
        transform: translateX(0);
    }
    
    /* 子菜单标题动画 */
    .mobile-nav-head {
        transition: color 0.3s ease;
    }
    
    /* 当前页面默认样式 */
    .mobile-nav-item.active>.mobile-nav-link{
        color: #286efa !important;
        font-weight: bold;
        position: relative;
    }
    
    /* 展开的父菜单样式 */
    .mobile-nav-item.on>.mobile-nav-head>.mobile-nav-link {
        color: #286efa !important;
        font-weight: bold;
        position: relative;
    }
    
    /* 子菜单当前页面样式 */
    .mobile-subNav .mobile-nav-item.active .mobile-nav-link,
    .mobile-subNav .mobile-nav-item.active .mobile-nav-chilad-link {
        color: #286efa !important;
        padding-left: 15px;
        font-weight: bold;
    }
    .mobile-nav-item.on .mobile-subNav{
        display: block;
    }
    /* 遮罩层淡入淡出动画 */
    .mobile-nav-mask {
        position: fixed !important;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 1;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.4s ease;
    }
    
    .mobile-nav-mask.show {
        opacity: 1;
        pointer-events: auto;
    }
    .mobile-subNav .mobile-nav-item.active{
        color: #286efa !important;
    }
}
/* 
.header {
    position: relative;
    z-index: 1000;
}

.menu-btn {
    display: none;
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 24px;
    cursor: pointer;
}

.menu-btn span {
    display: block;
    position: absolute;
    height: 3px;
    width: 100%;
    background: #333;
    border-radius: 3px;
    opacity: 1;
    left: 0;
    transform: rotate(0deg);
    transition: .25s ease-in-out;
}

.menu-btn span:nth-child(1) { top: 0px; }
.menu-btn span:nth-child(2) { top: 10px; }
.menu-btn span:nth-child(3) { top: 20px; }

.menu-btn.active span:nth-child(1) {
    top: 10px;
    transform: rotate(135deg);
}

.menu-btn.active span:nth-child(2) {
    opacity: 0;
    left: -60px;
}

.menu-btn.active span:nth-child(3) {
    top: 10px;
    transform: rotate(-135deg);
}

.moblie-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
}

.moblie-nav.active {
    display: block;
}

.mobile-nav-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

.mobile-nav-content {
    position: absolute;
    right: 0;
    top: 0;
    width: 80%;
    max-width: 300px;
    height: 100%;
    background: #fff;
    overflow-y: auto;
    transition: all 0.3s ease;
    transform: translateX(100%);
}

.moblie-nav.active .mobile-nav-content {
    transform: translateX(0);
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid #f0f0f0;
}

.mobile-nav-logo img {
    max-height: 40px;
}

.mobile-nav-close {
    font-size: 24px;
    cursor: pointer;
}

.mobile-nav-list {
    padding: 0;
    margin: 0;
    list-style: none;
}

.mobile-nav-item {
    border-bottom: 1px solid #f0f0f0;
}

.mobile-nav-link {
    display: block;
    padding: 15px 20px;
    color: #333;
    text-decoration: none;
}

.mobile-nav-item.active .mobile-nav-link {
    color: #F7B500;
}

.mobile-nav-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    cursor: pointer;
}

.mobile-nav-head .mobile-nav-link {
    padding: 0;
    display: inline;
}

.mobile-subNav {
    display: none;
    padding: 0;
    margin: 0;
    list-style: none;
    background: #f9f9f9;
}

.mobile-nav-item.on .mobile-subNav {
    display: block;
} */