.header_box {
    background-color: #ffffff;
    position: fixed;
    height: 64px;
    top: -64px;
    width: 100%;
    z-index: 1000;
    /* --tw-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --tw-shadow-colored: 0 4px 6px -1px var(--tw-shadow-color), 0 2px 4px -2px var(--tw-shadow-color);
    box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow); */

}


.is_da {
    top: -64px !important;
    transition: .3s;
}


.header_flex {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}


.left_img2 {
    width: 120px !important;
    height: 48px !important;
    margin-right: 10px;
}

.info_left {
    display: flex;
    align-items: center;
    height: 25px;
    color: #333;
    font-weight: bold;
    cursor: pointer;
}

.header_right {
    display: flex;
    align-items: center;
}

.select_box {
    font-size: 14px;
}

.language_switcher {
    display: flex;
    align-items: center;
    box-sizing: border-box;
}

/* 选择器容器 */
.lang-select {
    position: relative;
}

/* 触发按钮 */
.lang-trigger {
    display: flex;
    align-items: center;
    gap: 0px;
    width: 100%;
    padding: 0px 8px;
    background: #fff;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: border-color 0.2s;
}

.lang-trigger:hover {
    border-color: #999;
}

/* 图标样式 */
.lang-icon {
    width: 20px;
    height: 20px;
    background: url("data:images/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23666'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-5-9h10v2H7z'/%3E%3C/svg%3E") center no-repeat;
}

/* 箭头图标 */
.lang-arrow {
   margin-top: 2px;
    margin-left: 5px;
    width: 10px;
    height: 10px;
    background: url('../images/xx.png') center no-repeat;
    background-size: cover;
    transition: transform 0.2s;
}

/* 展开时箭头旋转 */
.lang-select.expanded .lang-arrow {
    transform: rotate(180deg);
}

/* 下拉菜单 */
.lang-options {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    margin-top: 4px;
    padding: 6px 0;
    background: #fff;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s;
    z-index: 10;
}

/* 展开状态 */
.lang-select.expanded .lang-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 选项样式 */
.lang-option {
    padding: 8px 12px;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.lang-option:hover {
    background-color: #f5f5f5;
}

/* 选中状态 */
.lang-option.selected {
    color: #165DFF;
    background-color: #f0f7ff;
}

.lang-option.selected::after {
    content: "";
    display: inline-block;
    margin-left: 8px;
    width: 12px;
    height: 12px;
    background: url("data:images/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23165DFF'%3E%3Cpath d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/%3E%3C/svg%3E") center no-repeat;
}

.nav_column {
    display: flex;
    align-items: center;
    font-size: 14px;
    margin-right: 20px;
}

.nav_column {
    cursor: pointer;
    text-align: center;
    color: #333;
    padding: 0 20px;
    /* font-weight: bold; */
}

.active_nav {
    padding: 0 35px;
    font-size: 16px;
    position: relative;
}

.active_info {
    position: absolute;
    max-width: 20px;
    min-width: 20px;
    height: 3px;
    left: 50%;
    bottom: -7px;
    border-radius: 6px;
    transform: translate(-50%);
    background-color: #3568d4;
}