* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: '微软雅黑', sans-serif;
}
html {
    overflow-y: scroll;
    scrollbar-gutter: stable ;
}
body {
    overflow-x: hidden;

}

a {
    text-decoration: none;
}
.header {
    position: fixed;
    top:0;
    z-index: 999;
    max-width: 1920px;
    width: 100%;
    background: #fff;
    font-size: 16px;
    box-sizing: border-box;
    height: 64px;
}
/* 导航外容器：1920px宽，居中 */
.header-nav-outer {
    max-width: 1920px;
    position: relative;
    padding: 0 12.5em;
    overflow: visible;
    height: 64px;
    background: #fff;
    display: flex;
    align-items: center;
    /* margin: 0 auto; */
}

/* 顶部导航栏：内容区带左右边距，外框1920px */
.header-nav-bar {
    width: 100%;
    max-width: 1520px;
    height:64px;
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    justify-content: space-between;
}

.header-log {
    width: 6.9375em;
    height: 1.75em;
    margin-right: 9.125em;
    flex-shrink: 0;
}

.header-nav-items {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    flex-wrap: nowrap;
    flex: 1;
    min-width: 0;
    margin-right: 5.125em;
}

.header-nav-item {
    height: 100%;
    display: flex;
    align-items: center;
    cursor: pointer;
    color: #1d1d1f;
    flex-shrink: 1;
    min-width: 0;
}

.header-nav-title {
    position: relative;
    height: 100%;
    font-size: 1em;
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    white-space: nowrap;
    padding: 0 0.3em;
}

/* 导航项下划线 */
.header-nav-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #004bfa;
    transform: scaleX(0);
    transition: transform 0.2s ease;
    z-index: 999;
}

.header-nav-title:hover::after,
.header-nav-title.active::after {
    transform: scaleX(1);
}

.header-nav-title.active {
    color: #004bfa;
}

/* 右侧功能按钮 */
.header-nav-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 2em;
    position: relative;
    flex-shrink: 0;
}

/* 搜索按钮容器 */
.header-search-wrapper {
    position: relative;
    display: inline-block;
}

/* 语言按钮容器 */
.header-lang-wrapper {
    position: relative;
    display: inline-block;
}

/* 购买按钮容器 */
.header-buy-wrapper {
    position: relative;
    display: inline-block;
}

.header-nav-btn {
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: color 0.2s;
}



.header-nav-btn:hover {
    color: #004bfa;
}

.header-buy-btn {
    background-color:#004bfa;
    color: #fff;
    padding: 5px 12px;
    border-radius: 1.25em;
    border: none;
    cursor: pointer;
    font-size: 0.875em;
    white-space: nowrap;
    display: flex;
    align-items: center;
}

/* ========== 响应式设计 - 整体缩放，保持比例 ========== */

/* 1920px 及以上 - 100% */
@media screen and (min-width: 1920px) {
    .header {
        font-size: 16px;
    }
}

/* 1680px - 1919px - 缩放至 93.75% */
@media screen and (max-width: 1919px) and (min-width: 1680px) {
    .header {
        font-size: 15px;
    }
}

/* 1600px - 1679px - 缩放至 90.625% */
@media screen and (max-width: 1679px) and (min-width: 1600px) {
    .header {
        font-size: 14.5px;
    }
}

/* 1520px - 1599px - 缩放至 87.5% */
@media screen and (max-width: 1599px) and (min-width: 1520px) {
    .header {
        font-size: 14px;
    }
}

/* 1440px - 1519px - 缩放至 84.375% */
@media screen and (max-width: 1519px) and (min-width: 1440px) {
    .header {
        font-size: 13.5px;
    }
}

/* 1360px - 1439px - 缩放至 81.25% */
@media screen and (max-width: 1439px) and (min-width: 1360px) {
    .header {
        font-size: 13px;
    }
}

/* 1280px - 1359px - 缩放至 78.125% */
@media screen and (max-width: 1359px) and (min-width: 1280px) {
    .header {
        font-size: 12.5px;
    }
}

/* 1200px - 1279px - 缩放至 75% */
@media screen and (max-width: 1279px) and (min-width: 1200px) {
    .header {
        font-size: 12px;
    }
}

/* 1140px - 1199px - 缩放至 75% (保持最小12px) */
@media screen and (max-width: 1199px) and (min-width: 1140px) {
    .header {
        font-size: 12px;
    }
}

/* 1080px - 1139px - 缩放至 75% (保持最小12px) */
@media screen and (max-width: 1139px) and (min-width: 1080px) {
    .header {
        font-size: 12px;
    }
}

/* 992px - 1079px - 缩放至 75% (保持最小12px) */
@media screen and (max-width: 1079px) and (min-width: 992px) {
    .header {
        font-size: 12px;
    }
}

/* 小于992px - 保持最小12px */
@media screen and (max-width: 991px) {
    .header {
        font-size: 12px;
    }
}

/* ========== 以下为原有样式，保持不变 ========== */

/* 原有的下拉框样式 - 带动画效果 */
.header-dropdown {
    box-sizing: border-box;
    max-width: 1920px;
    width: 100%;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: #fff;
    z-index: 99;
    border-top: none;
    overflow: hidden;
    padding-bottom: 2.375em;
    opacity: 0;
    transform: translateY(-1.25em);
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
   
}

/* .header-nav-item:hover .header-dropdown {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
} */

/* 添加动画锁定时的不响应状态 */
.header-dropdown.animating-out {
    pointer-events: none;
}

/* Tabs切换栏：居中，宽度100%（基于下拉框内容区） */
.header-dropdown-tabs {
    display: flex;
    justify-content: center;
    margin: 0 auto;
    padding-bottom: 1.75em;
    padding-top: 1.75em;
    width: calc(100% - 2.5em);
}

.header-tab-item:last-child {
    margin-right: 0;
}

.header-tab-item {
    font-size: 1em;
    color: #1d1d1f;
    cursor: pointer;
    position: relative;
    margin-right: 9.375em;
}

.header-tab-item.active::after {
    content: '';
    position: absolute;
    bottom: -0.5075em;
    left: 0;
    width: 100%;
    height: 0.125em;
    background-color: #004bfa;
}

/* 下拉框内容容器：宽度100%，左右留20px边距 */
.header-dropdown-content {
    width: 100%;
    min-width: 1080px;
    padding: 0 12.5em;
    display: flex;
    justify-content: space-between;
    box-sizing: border-box;
    align-items: flex-start;
}

/* 左侧6个分类区块 */
.header-dropdown-category {
    display: flex;
    flex: 1; 
    justify-content: space-between;
   
 
}

.header-category-box {
    display: flex;
    flex-direction: column;
    flex:1;
    max-width: 362px;
    margin-right:1.5em;
    gap: 1.7em 0;
    /* width: 20%; */
   
}




.header-category-title {
    font-size: 1em;
    color: #1d1d1f;
    margin-bottom: 0.75em;
    font-weight: 900;
    line-height: 1;
}

.header-category-list {
    list-style: none;
}

.header-category-item {
    font-size: 0.875em;
    color: #686a70;
    margin-bottom: 0.71em;
    cursor: pointer;
}

.header-category-item a {
    color: #686a70;
}

.header-category-item:last-child {
    margin: 0;
}

.header-category-item a:hover {
    color: #0066ff;
}



.header-dropdown-products {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    flex: 1;
    min-width: 0;
   font-size: 16px;
    max-width: 748px;
}



.header-product-card {
    text-align: center;
    width: calc(50% - 0.75em);
    max-width: 22.625em;
    flex-shrink: 1;
    min-width: 260px;
    transition: transform 0.2s ease;
}


.header-product-card-1 {
    text-align: center;
    width: 100%;
    max-width: 22.625em;

}

.header-product-card:hover {
    transform: translateY(-2px)
}

.header-product-card-1:hover {
    transform: translateY(-2px)
}

/* .header-product-card:nth-child(1) {
   
} */

.header-product-card:nth-child(3) {
   
    margin-top: 1.5em;
}

.header-product-card:nth-child(4) {
    margin-top: 1.5em;
}


.header-product-img {
    width: 100%;
    aspect-ratio: 22.625 / 12.25;
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    overflow: hidden;
}

.header-product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.header-product-name {
    font-size: 1em;
    color: #1d1d1f;
    line-height: 2;
}

/* 修改 .dropdown-content1 的样式 - 卡片居中对齐 */
.header-dropdown-content1 {
    width: 100%;
    min-width: 1080px;
    padding: 3.4em 12.5em;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 3.4em 1.875em;
    box-sizing: border-box;
}

/* 修改 .product-card-1 的样式 - 设置宽度，确保一行最多4个 */
.header-product-card-1 {
    width: calc(25% - 1.40625em);
    /* background: #fff; */
    border-radius: 0.5em;
    max-width: 362px;
    flex-shrink: 0;

}

/* 如果需要更好的兼容性，用 padding 技巧替代 aspect-ratio */
.header-product-img-1 {
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    width: 100%;
    position: relative;
    padding-bottom: 53%;
    height: 0;
    overflow: hidden;
    font-size: 16px;
}

/* 图片样式 - 确保图片正确显示 */
.header-product-img-1 img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 内容区域自适应 */
.header-product-title-1 {
    font-weight: 900;
    font-size: 1em;
    color: #1d1d1f;
    text-align: left;
    margin-top: 1em;
    padding: 0 0.5em;
    line-height: 1.5;
    word-break: break-word;
}

.header-product-name-1 {
    font-size: 0.875em;
    color: #686a70;
    text-align: left;
    margin-top: 0.25em;
    margin-bottom: 1.0625em;
    padding: 0 0.5em;
    line-height: 1.5;
    word-break: break-word;
}

/* 隐藏非当前选中的Tabs内容 */
.header-tab-content {
    display: none;
}

.header-tab-content.active {
    display: flex;
}

/* ========== 搜索下拉框样式 ========== */
.header-search-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.75em;
    background: #ffffff;
    border-radius: 0.75em;
    box-shadow: 0 0.5em 1.5em rgba(0, 0, 0, 0.12);
    width: 26em;
    padding: 1.5em;
    z-index: 1000;
    display: none;
    animation: fadeIn 0.2s ease;
}

.header-search-dropdown.show {
    display: block;
}

.header-search-input-wrapper {
    display: flex;
    gap: 0.625em;
    border: 1px solid #e5e7eb;
    border-radius: 2em;
    padding: 0.5em 1em;
    background: #f9fafb;
    margin-bottom: 1em;
}

.header-search-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-size: 0.875em;
    color: #1d1d1f;
}

.header-search-input::placeholder {
    color: #9ca3af;
}

.header-search-submit {
    background: #004bfa;
    color: white;
    border: none;
    padding: 0.375em 1em;
    border-radius: 1.5em;
    cursor: pointer;
    font-size: 0.8125em;
    transition: background 0.2s;
}

.header-search-submit:hover {
    background: #0039cc;
}

/* 搜索记录区域 */
.header-search-history {
    margin-bottom: 1.25em;
}

.header-history-title {
    font-size: 1em;
    color: #9ca3af;
    margin-bottom: 0.625em;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-clear-history {
    color: #004bfa;
    cursor: pointer;
    font-size: 14px;
    padding: 0.2em 0.5em;
    border-radius: 0.25em;
    transition: background 0.2s;
}

.header-clear-history:hover {
    background: #f0f7ff;
}

.header-history-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5em;
}

.header-history-item {
    font-size: 0.8125em;
    color: #1d1d1f;
    cursor: pointer;
    padding: 0.25em 0.625em;
    background: #f3f4f6;
    border-radius: 1em;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.25em;
}

.header-history-item:hover {
    background: #004bfa;
    color: white;
}

.header-history-item .header-delete-icon {
    font-size: 0.875em;
    opacity: 0;
    transition: opacity 0.2s;
}

.header-history-item:hover .header-delete-icon {
    opacity: 1;
}

/* 热销产品区域 - 使用flex-wrap，一行最多3个，超过自动换行 */
.header-hot-products {
    border-top: 1px solid #f0f0f0;
    padding-top: 0.75em;
}

.header-hot-title {
    font-size: 1em;
    color: #9ca3af;
    margin-bottom: 0.75em;
}

.header-hot-product-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5em;
    margin: 0;
    padding: 0;
}

.header-hot-product-item {
    flex: 0 0 calc(33.333% - 1em);
    min-width: 0;
    cursor: pointer;
    text-align: center;
    transition: transform 0.2s;
    box-sizing: border-box;
}

.header-hot-product-item:hover {
    transform: translateY(-2px);
}

.header-hot-product-img {
    width: 7.1875em;
    height: 7.1875em;
    max-width: 115px;
    max-height: 115px;
    background: linear-gradient(135deg, #f5f7fc 0%, #eef2f8 100%);
    border-radius: 0.5em;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.5em auto;
    overflow: hidden;
}

.header-hot-product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.header-hot-product-img .emoji {
    font-size: 2.5em;
}

.header-hot-product-name {
    font-size: 0.8125em;
    color: #1d1d1f;
    font-weight: 500;
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 语言下拉框样式 */
.header-lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.75em;
    background: #ffffff;
    border-radius: 0.75em;
    box-shadow: 0 0.5em 1.5em rgba(0, 0, 0, 0.12);
    min-width: 12em;
    padding: 1.5em 0;
    z-index: 1000;
    display: none;
    animation: fadeIn 0.2s ease;
}

.header-lang-dropdown.show {
    display: block;
}

.header-lang-item {
    display: block;
    padding: 0.75em 1.25em;
    cursor: pointer;
    transition: background 0.2s;
    width: 100%;
    font-size: 0.875em;
    color: #1d1d1f;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.625em;
}

.header-lang-item:hover {
    background: #f3f4f6;
    color: #004bfa;
}

.header-lang-item.active {
    color: #004bfa;
    background: #f0f7ff;
}

.header-lang-code {
    font-weight: 500;
    min-width: 2.5em;
    white-space:nowrap;
}

.header-lang-name {
    flex: 1;
}
.header-lang-name-en {
    flex: 1;
    min-width: 126px;
}
.header-lang-dropdown-delete-icon,
.header-search-dropdown-delete-icon {
    font-size: 12px;
    position: absolute;
    top: 10px;
    right: 14px;
    cursor: pointer;

}

/* ========== 购买下拉框样式 ========== */
.header-buy-dropdown {
    box-sizing: border-box;
    max-width: 1920px;
    width: 100%;
    position: absolute;
    top: 3.75em;
    left: 0;             
    right: 0;
    background-color: #fff;
    z-index: 999;
    border-top: none;
    overflow: visible;
    display: none;
    padding: 3.5em 12.5em;
}

.header-buy-dropdown.show {
    display: block;
}

/* 购买下拉框内容容器 - 居中显示，固定一行7个卡片 */
.header-buy-dropdown-content {
    width: 100%;
    max-width: 1520px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    box-sizing: border-box;
    row-gap: 121px;
}

/* 购买产品卡片：宽度96px，右边距动态计算 */
.header-buy-product-card {
    width: 96px;
    text-align: center;
    cursor: pointer;
    margin-right: calc((100% - (96px * 7)) / 4);

}


/* 每行第7个卡片（一行最后一个）清除右边距 */
.header-buy-product-card:last-of-type {
    margin-right: 0;
}


.header-buy-product-card:hover {
    transform: translateY(-2px)
}



.header-buy-product-card a {
    text-decoration: none;
    display: block;
}

/* 图片容器：宽度100%，高度自适应，保持正方形比例 */
.header-buy-product-img {
    width: 100%;
    aspect-ratio: 1 / 1;
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 0.5em;
    position: relative;
}

/* 图片样式：实现悬浮切换效果，完全填充容器 */
.header-buy-product-img img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: opacity 0.2s ease;
}

/* 默认显示普通图，隐藏悬浮图 */
.header-buy-product-img .header-default-img {
    opacity: 1;
}

.header-buy-product-img .header-hover-img {
    opacity: 0;
}

/* 鼠标悬停时：显示悬浮图，隐藏普通图 */
/* .header-buy-product-card:hover .header-buy-product-img .header-default-img {
    opacity: 0;
}

.header-buy-product-card:hover .header-buy-product-img .header-hover-img {
    opacity: 1;
} */

/* 产品标题样式：不加粗，字体大小16px，超出一行显示省略号 */
.header-buy-product-title {
    font-weight: normal;
    font-size: 1em;
    color: #1d1d1f;
    text-align: center;
    margin-top: 0.75em;
    word-break: break-word;
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    white-space: normal;
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-0.5em);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 1280px及以下屏幕，渐进式调整间距 */
@media screen and (max-width: 1280px) {
    .header-log {
        margin-right: 2em;
    }

    .header-nav-items {
        margin-right: 1em;
    }

    .header-nav-outer {
        padding: 0 12em;
    }

    .header-dropdown-content {
        padding: 0 12em;
    }

    .header-dropdown-content1 {
        padding: 2em 12em;
    }

    .header-buy-dropdown {
        padding: 3.5em 12em;
    }

    .header-buy-dropdown-content {
        max-width: 1200px;
        row-gap: 100px;
    }
}

/* 1152px及以下，进一步缩小 */
@media screen and (max-width: 1152px) {
    .header-log {
        margin-right: 1em;
    }

    .header-nav-outer {
        padding: 0 10em;
    }

    .header-dropdown-content {
        padding: 0 10em;
    }

    .header-dropdown-content1 {
        padding: 2em 10em;
    }

    .header-buy-dropdown {
        padding: 3.5em 10em;
    }

    .buy-dropdown-content {
        max-width: 1080px;
        row-gap: 80px;
    }
}

/* 1080px及以下，最小间距 */
@media screen and (max-width: 1080px) {
    .header-log {
        margin-right: 1em;
    }

    .header-nav-outer {
        padding: 0 8em;
    }

    .header-dropdown-content {
        padding: 0 8em;
    }

    .header-dropdown-content1 {
        padding: 2em 8em;
    }

    .header-buy-dropdown {
        padding: 3.5em 8em;
    }

    .header-buy-dropdown-content {
        max-width: 1000px;
        row-gap: 60px;
    }
}
/* 蒙版层样式 */
#mhk {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    backdrop-filter: blur(5px);
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 90;
    display: none;
    overflow: hidden;
}
