/* 手机端专用样式 */
@media (max-width: 1080px) {
    /* 导航菜单遮罩层样式优化 */
    .nav_mask {
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.6);
        position: fixed;
        left: 0;
        top: 0;
        z-index: 9998;
        display: none;
    }
    
    /* 导航菜单打开时的遮罩层 */
    .nav_list.open .nav_mask {
        display: block;
    }
    
    /* 导航菜单列表样式优化 */
    .nav_list ul {
        width: 60%;
        height: 100%;
        background-color: #fff;
        position: fixed;
        left: -100%;
        top: 0;
        z-index: 9999;
        transition: left 0.3s ease;
        overflow-y: auto;
    }
    
    .nav_list.open ul {
        left: 0;
    }
    
    /* 导航菜单项样式 */
    .nav_list ul > li {
        width: 100%;
        overflow: hidden;
        margin: 0 auto;
        padding: 0;
        background: none;
        box-sizing: border-box;
        position: relative;
        border-bottom: 1px solid rgba(85, 87, 89, 0.1);
    }
    
    .nav_list ul > li:last-child {
        border-bottom: none;
    }
    
    .nav_list ul > li a {
        display: block;
        width: 100%;
        line-height: 60px;
        color: #333;
        font-size: 16px;
        text-align: left;
        padding: 0 20px;
        border-radius: 0;
        -webkit-box-sizing: border-box;
        -moz-box-sizing: border-box;
        box-sizing: border-box;
    }
    
    /* 子菜单箭头图标 */
    .nav_list ul > li i {
        display: block;
        width: 60px;
        height: 60px;
        background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23333' d='M7.41 8.84L12 13.42l4.59-4.58L18 10.25l-6 6-6-6z'/%3E%3C/svg%3E") no-repeat center center;
        background-size: 20px 20px;
        position: absolute;
        top: 0;
        right: 0;
        transition: transform 0.3s ease;
    }
    
    .nav_list ul > li i.cur {
        transform: rotate(180deg);
    }
    
    /* 子菜单样式 */
    .nav_list ul > li ul {
        width: 100%;
        overflow: hidden;
        position: relative;
        left: inherit;
        top: inherit;
        background-color: #f8f8f8;
        box-shadow: none;
        border: 0;
        border-radius: 0;
        display: none;
    }
    
    .nav_list ul > li ul.show {
        display: block;
    }
    
    .nav_list ul > li ul li {
        border-bottom: 1px solid rgba(85, 87, 89, 0.1);
    }
    
    .nav_list ul > li ul li:last-child {
        border-bottom: none;
    }
    
    .nav_list ul > li ul li a {
        height: 50px;
        line-height: 50px;
        color: #666;
        text-align: left;
        border: 0;
        padding: 0 40px;
        font-size: 14px;
    }
    
    .nav_list ul > li ul li a:hover {
        color: #178655;
        background-color: #f0f0f0;
    }
    
    /* 汉堡菜单按钮样式优化 */
    .nav_menu {
        display: block;
        margin: 13px 0;
        padding: 4px;
        border-radius: 50%;
        background-color: #31a974;
        cursor: pointer;
        border: none;
    }
    
    .nav_menu p {
        width: 36px;
        height: 36px;
        padding: 10px 8px;
        background-color: #178655;
        border-radius: 50%;
        margin: 0;
        -webkit-box-sizing: border-box;
        -moz-box-sizing: border-box;
        box-sizing: border-box;
    }
    
    .nav_menu p span {
        display: block;
        width: 100%;
        height: 2px;
        background-color: #fff;
        border-radius: 1px;
        margin: 0 auto;
        transition: all 0.3s ease;
    }
    
    .nav_menu p span + span {
        margin-top: 5px;
    }
    
    /* 汉堡菜单动画 */
    .nav_menu.active p span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .nav_menu.active p span:nth-child(2) {
        opacity: 0;
    }
    
    .nav_menu.active p span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
}

@media (max-width: 767px) {
    .nav_menu {
        margin: 8px 0;
    }
    
    .nav_list ul {
        width: 80%;
    }
    
    .nav_list ul > li a {
        line-height: 55px;
    }
}

@media (max-width: 480px) {
    .nav_list ul {
        width: 85%;
    }
    
    .nav_list ul > li a {
        line-height: 50px;
        font-size: 15px;
        padding: 0 15px;
    }
    
    .nav_list ul > li ul li a {
        padding: 0 30px;
    }
}