.header .menu {
    font-family: Source Han Sans SC;
    font-weight: bold;
    font-size: 14px;
    color: #333333;
}

.header .menu li {
    cursor: pointer;
}

@media screen and (min-width: 769px) {
    #header_mob {
        display: none;
    }
    .header {
        position: fixed;
        width: 100%;
        height: 60px;
        background: white;
        z-index: 999;
    }
    .header .section-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 100%;
    }
    .header .logo img {
        width: 43px;
        height: 43px;
    }
    .header .menu {
        width: 70%;
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 0;
        height: 100%;
    }
    .header .menu li {
        height: 100%;
        display: flex;
        align-items: center;
        position: relative;
    }
    .header .menu a {
        color: #333;
    }
    .header .menu .active a {
        color: #3f8ed0;
    }
    .header .menu .active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 43px;
        height: 3px;
        background: #FFBB11;
    }
    .header .menu .has-submenu a {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .header .menu .menu-arrow {
        width: 12px;
        height: 8px;
        background: url("../images/header/arrow_bottom.png") center center / contain no-repeat;
        transition: transform 0.2s ease;
    }
    .header .menu .menu-arrow.open {
        transform: rotate(180deg);
    }
    .header .container-box1 {
        padding: 0 150px;
        font-family: inherit;
        height: 100%;
    }
    .header .language-select {
        display: flex;
        align-items: center;
    }
    .header .language-select img {
        width: 20px;
        margin-right: 5px;
    }
    .header .language-select select {
        border: none;
        background: transparent;
        color: #333;
        outline: none;
        border: none;
        flex-shrink: 0;
    }
    .header .language-select select:after {
        content: "\25BC";
        /* Unicode编码，表示向下的箭头 */
        position: absolute;
        top: 12px;
        right: 10px;
    }
    .language-select select option {
        padding: 5px;
        background-color: #f9f9f9;
        color: #333;
    }
    .product-submenu {
        display: none;
        position: fixed;
        top: 60px;
        left: 50%;
        transform: translateX(-50%);
        width: 100%;
        max-width: 100vw;
        height: 52px;
        background: rgba(255, 255, 255, 0.6);
        z-index: 998;
        padding: 0 30px;
        box-sizing: border-box;
    }
    .product-submenu .product-submenu-list {
        list-style: none;
        margin: 0;
        padding: 0 30px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
    }
    .product-submenu .product-submenu-list li {
        height: 100%;
    }
    .product-submenu .product-submenu-list li a {
        font-family: Source Han Sans SC;
        font-size: 12px;
        font-weight: 500;
        color: #333;
        text-decoration: none;
        white-space: nowrap;
        height: 100%;
        display: flex;
        align-items: center;
    }
    .product-submenu .product-submenu-list li a:hover {
        color: #3f8ed0;
    }
    .product-submenu .product-submenu-list li.active a {
        color: #3f8ed0;
    }
}

@media screen and (max-width: 769px) {
    #header {
        display: none;
    }
    #header_mob {
        position: fixed;
        width: 100%;
        max-width: 100vw;
        height: 60px;
        background: white;
        z-index: 999;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        left: 0;
        right: 0;
    }
    #header_mob .container-box {
        position: relative;
        padding: 0 20px;
        height: 100%;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    #header_mob .section-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 100%;
        font-family: Source Han Sans SC;
    }
    #header_mob .logo img {
        width: 45px;
        height: 45px;
    }
    #header_mob .menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: space-around;
        width: 24px;
        height: 20px;
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 0;
        z-index: 1000;
    }
    #header_mob .menu-toggle span {
        display: block;
        width: 100%;
        height: 2px;
        background: #333;
        transition: all 0.3s ease;
        border-radius: 2px;
    }
    #header_mob .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    #header_mob .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    #header_mob .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    #header_mob .menu {
        display: none;
        position: absolute;
        width: 100%;
        max-width: 100vw;
        top: 60px;
        left: 0;
        right: 0;
        background: white;
        z-index: 999;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        padding: 20px 0;
        box-sizing: border-box;
    }
    #header_mob .menu ul {
        list-style: none;
        margin: 0;
        padding: 0 20px;
    }
    #header_mob .menu ul li {
        padding: 15px 0;
        position: relative;
        border-bottom: 1px solid #f0f0f0;
    }
    #header_mob .menu ul li:last-child {
        border-bottom: none;
    }
    #header_mob .menu ul li a {
        font-family: Source Han Sans SC;
        font-size: 12px;
        font-weight: bold;
        line-height: 20px;
        color: #333;
        text-decoration: none;
        display: block;
    }
    #header_mob .menu ul li a:hover {
        color: #3f8ed0;
    }
    #header_mob .menu ul li.active a {
        color: #3f8ed0;
    }
    /* #header_mob .menu ul li.active::after {
        content: '';
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 3px;
        height: 20px;
        background: #FFBB11;
    } */
    /* 移动端产品子菜单样式 */
    #header_mob .menu ul li.has-submenu .product-menu-link {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
    }
    #header_mob .menu ul li.has-submenu .menu-arrow {
        width: 12px;
        height: 8px;
        background: url("../images/header/arrow_bottom.png") center center / contain no-repeat;
        transition: transform 0.2s ease;
        flex-shrink: 0;
        margin-left: 8px;
    }
    #header_mob .menu ul li.has-submenu .menu-arrow.open {
        transform: rotate(180deg);
    }
    #header_mob .menu ul li .product-submenu-mob {
        display: none;
        list-style: none;
        margin: 10px 0 0 0;
        padding: 0 0 0 20px;
        background: #f9f9f9;
        border-radius: 4px;
    }
    #header_mob .menu ul li .product-submenu-mob li {
        padding: 12px 0;
        border-bottom: 1px solid #e8e8e8;
    }
    #header_mob .menu ul li .product-submenu-mob li:last-child {
        border-bottom: none;
    }
    #header_mob .menu ul li .product-submenu-mob li a {
        font-size: 13px;
        font-weight: 500;
        color: #666;
        padding: 0;
    }
    #header_mob .menu ul li .product-submenu-mob li a:hover {
        color: #3f8ed0;
    }
    #header_mob .menu ul li .product-submenu-mob li.active a {
        color: #3f8ed0;
    }
    /* #header_mob .menu ul li .product-submenu-mob li.active::after {
        content: '';
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 3px;
        height: 16px;
        background: #FFBB11;
    } */
    .product-submenu {
        display: none;
    }
    /* 移动端菜单动画优化 */
    #header_mob .menu {
        max-height: calc(100vh - 60px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    #header_mob .change {
        display: flex;
        align-items: center;
    }
    #header_mob .language-select {
        display: flex;
        align-items: center;
        margin-right: 20px;
    }
    #header_mob .language-select img {
        width: 20px;
        margin-right: 5px;
    }
    #header_mob .language-select select {
        border: none;
        background: transparent;
        color: #333;
        outline: none;
        border: none;
        flex-shrink: 0;
    }
    #header_mob .language-select select:after {
        content: "\25BC";
        /* Unicode编码，表示向下的箭头 */
        position: absolute;
        top: 12px;
        right: 10px;
    }
    .language-select select option {
        padding: 5px;
        background-color: #f9f9f9;
        color: #333;
    }
}