@charset "utf-8";

/*
 * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
}
*/


.main-nav {
    background-color: #000;
    color: white;
    /* position: relative; */
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    opacity:0.8;
}

.nav-container {
    max-width: 1500px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
}

.logo {
    position: unset;
    height:auto;
}

.logo-image {
    height: 52px;
    width: auto;
    vertical-align: middle;
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
    /* gap: 20px; */
}

.nav-item {
    position: relative;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-size: 18px;
    white-space: nowrap;
    padding: 30px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    /* transition: color 0.3s ease; */
}

.nav-link i {
    margin-left: 8px;
    font-size: 10px;
    font-weight: 100;
    /* transform: scale(0.8); */
}

.nav-link:hover,
.dropdown.active > .nav-link {
    color: #e8eaf6;
}

.nav-item.dropdown.active::after {
    content: '▲';
    position: absolute;
    right: 50%;
    bottom: -4.5px;
    font-size: 18px;
    color: #fff;
    /* 新增：横向拉伸三角，1.5可改（如2=2倍宽） */
    transform: scaleX(1.5);
    /* 可选：拉伸后保持居中（避免三角偏移） */
    transform-origin: 50% 50%;
    /* 可选：若拉伸后垂直方向也想微调，加scaleY()，如 scale(1.5, 1) */
} 

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: -25%;
    background-color: white;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    min-width: 280px;
    opacity: 0;
    visibility: hidden;
    /* transform: translateY(-10px); */
    /* transition: all 0.3s ease; */
    z-index: 1001;
}

.dropdown:hover .dropdown-menu,
.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    /* transform: translateY(0); */
}

.dropdown-column {
    padding: 20px;
    width: 100%;
    box-sizing: border-box;
}

.dropdown-column h3 {
    color: #3f51b5;
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 2px solid #3f51b5;
}

.dropdown-column ul {
    list-style: none;
    box-sizing: border-box;
}

.dropdown-column ul li {
    margin-bottom: 10px;
    position: relative;
}

.dropdown-column ul li a {
    color: #333;
    text-decoration: none;
    font-size: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 5px;
    /* transition: all 0.3s ease; */
}

.dropdown-column ul li a i {
    font-size: 10px;
    color: #999;
    float: right;
    margin-right: 5px;
    font-weight: 100;
}

/* 所有Font Awesome箭头图标统一细体样式 */
.fa-angle-right,
.fa-chevron-right,
.fa-chevron-down {
    font-weight: 100 !important;
}

/* 搜索图标细体样式 */
.fa-search {
    font-weight: 100 !important;
    transform: scale(0.9);
}
li.nav-item.sub-dropdown.active >a i {
    color: #fff;
}

.dropdown-column ul li a:hover,
.sub-dropdown.active > a {
    color: #3f51b5;
    /* padding-left: 5px; */
}

li.nav-item.sub-dropdown.active {
    background: #1465ff;
}

li.nav-item.sub-dropdown.active>a {
    color: #fff!important;
}

/* 确保所有子菜单项都有正确的定位上下文 */
.dropdown-column ul li {
    /* position: relative; */
    position: revert;
}

/* .sub-dropdown > a::after {
    content: '>';
    position: absolute;
    right: 0;
    font-size: 12px;
    color: #999;
} */

.sub-dropdown-menu {
    position: absolute;
    left: 100%;
    top: 0;
    background-color: white;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    min-width: 250px;
    opacity: 0;
    visibility: hidden;
    /* transform: translateX(-10px); */
    /* transition: all 0.3s ease; */
    z-index: 1002;
    /* border-right: 1px solid #333; */
    height: 100%;
}

.sub-dropdown:hover .sub-dropdown-menu {
    opacity: 1;
    visibility: visible;
    /* transform: translateX(0); */
}

.sub-dropdown-column {
    padding: 20px;
}

.sub-dropdown-column ul li {
    margin-bottom: 10px;
}

li.nav-item.sub-sub-dropdown.active {
    border-bottom: 1px solid #eee;
}

.sub-dropdown-column ul li a {
    color: #333;
    text-decoration: none;
    display: block;
    padding: 5px 0;
    /* transition: all 0.3s ease; */
}

.sub-dropdown-column ul li a:hover,
.sub-sub-dropdown.active > a {
    color: #3f51b5;
    padding-left: 5px;
}

/* .sub-sub-dropdown > a::after {
    content: '>';
    position: absolute;
    right: 0;
    font-size: 12px;
    color: #999;
} */

.sub-sub-dropdown-menu {
    position: absolute;
    left: 100%;
    top: 0;
    background-color: white;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    min-width: 250px;
    opacity: 0;
    visibility: hidden;
    /* transform: translateX(-10px); */
    /* transition: all 0.3s ease; */
    z-index: 1003;
    /* border-right: 1px solid #333; */
    height: 100%;
}

.sub-sub-dropdown:hover .sub-sub-dropdown-menu {
    opacity: 1;
    visibility: visible;
    /* transform: translateX(0); */
}

.sub-sub-dropdown-column {
    padding: 20px;
}

.sub-sub-dropdown-column ul li {
    margin-bottom: 10px;
}

.sub-sub-dropdown-column ul li a {
    color: #333;
    text-decoration: none;
    font-size: 13px;
    display: block;
    padding: 5px 0;
    /* transition: all 0.3s ease; */
}

.sub-sub-dropdown-column ul li a:hover,
.sub-sub-dropdown.active > a {
    color: #3f51b5;
    padding-left: 5px;
}

/* 重置所有默认的激活状态，只在悬停时激活 */
.dropdown:hover .dropdown-column ul li > a {
    color: #333;
    /* padding-left: 0; */
    white-space: nowrap;
}

.dropdown:hover .dropdown-column ul li .sub-dropdown-column ul li > a {
    color: #333;
    padding-left: 0;
}

.dropdown:hover .dropdown-column ul li .sub-dropdown-column ul li .sub-sub-dropdown-column ul li > a {
    color: #333;
    padding-left: 0;
}

/* 重置所有默认的子菜单显示状态 */
.dropdown:hover .dropdown-column ul li > .sub-dropdown-menu {
    opacity: 0;
    visibility: hidden;
    /* transform: translateX(-10px); */
    height: 0;
    overflow: hidden;
}

.dropdown:hover .dropdown-column ul li .sub-dropdown-column ul li > .sub-sub-dropdown-menu {
    opacity: 0;
    visibility: hidden;
    /* transform: translateX(-10px); */
    height: 0;
    overflow: hidden;
}

/* 确保默认激活状态下的子菜单正确显示 */
.dropdown.active .dropdown-column ul li.active > .sub-dropdown-menu,
.dropdown.active .dropdown-column ul li.active .sub-dropdown-column ul li.active > .sub-sub-dropdown-menu {
    opacity: 1;
    visibility: visible;
    /* transform: translateX(0); */
    height: 100%;
    overflow: visible;
    border-left: 1px solid #eee;
	min-width: 280px;
}

/* 移动端下使用height属性控制子菜单显示/隐藏 */
@media (max-width: 768px) {
    /* 重置移动端默认的子菜单显示状态 */
    .dropdown:hover .dropdown-column ul li > .sub-dropdown-menu {
        height: 0;
        overflow: hidden;
    }

    .dropdown:hover .dropdown-column ul li .sub-dropdown-column ul li > .sub-sub-dropdown-menu {
        height: 0;
        overflow: hidden;
    }

    /* 确保移动端激活状态下的子菜单正确显示 */
    .dropdown.active .dropdown-column ul li.active > .sub-dropdown-menu,
    .dropdown.active .dropdown-column ul li.active .sub-dropdown-column ul li.active > .sub-sub-dropdown-menu {
        height: auto;
        overflow: visible;
    }

    .dropdown-column ul li a {
        color: #333;
        text-decoration: none;
        font-size: 13px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 8px 5px;
        /* transition: all 0.3s ease; */
    }
    .sub-dropdown-column ul li {
        margin-bottom: 1px;
    }
    li.nav-item.sub-dropdown.active >a i {
        color: #999;
    }
}

/* 激活当前hover的sub-dropdown */
.sub-dropdown:hover > a,
.sub-dropdown.active > a {
    color: #3f51b5;
    /* padding-left: 5px; */
}

/* 激活当前hover的sub-dropdown及其子菜单 */
.sub-dropdown:hover > .sub-dropdown-menu,
.sub-dropdown.active > .sub-dropdown-menu {
    opacity: 1;
    visibility: visible;
    /* transform: translateX(0); */
    height: auto;
    overflow: visible;
}

/* 激活当前hover的sub-sub-dropdown */
.sub-sub-dropdown:hover > a,
.sub-sub-dropdown.active > a {
    color: #3f51b5;
    padding-left: 5px;
}

/* 激活当前hover的sub-sub-dropdown及其子菜单 */
.sub-sub-dropdown:hover > .sub-sub-dropdown-menu,
.sub-sub-dropdown.active > .sub-sub-dropdown-menu {
    opacity: 1;
    visibility: visible;
    /* transform: translateX(0); */
    height: auto;
    overflow: visible;
}

/* 移动端下，激活状态的子菜单使用height属性控制显示 */
@media (max-width: 768px) {

li.nav-item.sub-dropdown.active {
    background: #eee;
    overflow: hidden;
}
li.nav-item.sub-dropdown.active>a {
    color: #333!important;
}
li.nav-item.sub-sub-dropdown.active {
    border-bottom: 0px solid #eee;
}
.dropdown.active .dropdown-column ul li.active > .sub-dropdown-menu, .dropdown.active .dropdown-column ul li.active .sub-dropdown-column ul li.active > .sub-sub-dropdown-menu {
    border-left: 0px solid #eee;
}

    /* 激活当前hover的sub-dropdown及其子菜单 */
    .sub-dropdown:hover > .sub-dropdown-menu,
    .sub-dropdown.active > .sub-dropdown-menu {
        height: auto;
        overflow: visible;
    }

    /* 激活当前hover的sub-sub-dropdown及其子菜单 */
    .sub-sub-dropdown:hover > .sub-sub-dropdown-menu,
    .sub-sub-dropdown.active > .sub-sub-dropdown-menu {
        height: auto;
        overflow: visible;
    }
}

/* 确保当鼠标悬停在子菜单上时，其父级菜单保持active状态 */
.sub-dropdown-menu:hover,
.sub-sub-dropdown-menu:hover {
    opacity: 1;
    visibility: visible;
    /* transform: translateX(0); */
    height: auto;
    overflow: visible;
}

/* 默认显示第一个分类的二级分类 */
.dropdown.active .dropdown-menu {
    opacity: 0.95;
    visibility: visible;
    /* transform: translateY(0); */
}


/* 当鼠标悬停在某个一级分类上时，重置其他一级分类的样式 */
.nav-menu > li.dropdown:hover ~ li.dropdown,
.nav-menu > li.dropdown:hover ~ li.dropdown.active {
    opacity: 1;
}

/* 当鼠标悬停在某个一级分类上时，重置其他一级分类的active状态 */
.nav-menu > li.dropdown:hover ~ li.dropdown.active .dropdown-column ul li:first-child.sub-dropdown > a {
    color: #333;
    padding-left: 0;
}

.nav-menu > li.dropdown:hover ~ li.dropdown.active .dropdown-column ul li:first-child.sub-dropdown > .sub-dropdown-menu {
    opacity: 0;
    visibility: hidden;
    /* transform: translateX(-10px); */
}

.nav-menu > li.dropdown:hover ~ li.dropdown.active .dropdown-column ul li:first-child.sub-dropdown .sub-dropdown-column ul li:first-child.sub-sub-dropdown > a {
    color: #333;
    padding-left: 0;
}

.nav-menu > li.dropdown:hover ~ li.dropdown.active .dropdown-column ul li:first-child.sub-dropdown .sub-dropdown-column ul li:first-child.sub-sub-dropdown > .sub-sub-dropdown-menu {
    opacity: 0;
    visibility: hidden;
    /* transform: translateX(-10px); */
}

.nav-menu > li.dropdown:hover ~ li.dropdown.active .dropdown-column ul li:first-child.sub-dropdown .sub-dropdown-column ul li:first-child.sub-sub-dropdown .sub-sub-dropdown-column ul li:first-child > a {
    color: #333;
    padding-left: 0;
}

/* 当鼠标离开所有一级分类时，确保只有active的分类保持样式 */
.nav-menu:not(:hover) .dropdown:not(.active) .dropdown-column ul li:first-child.sub-dropdown > a,
.nav-menu:not(:hover) .dropdown:not(.active) .dropdown-column ul li:first-child.sub-dropdown .sub-dropdown-column ul li:first-child.sub-sub-dropdown > a,
.nav-menu:not(:hover) .dropdown:not(.active) .dropdown-column ul li:first-child.sub-dropdown .sub-dropdown-column ul li:first-child.sub-sub-dropdown .sub-sub-dropdown-column ul li:first-child > a {
    color: #333;
    padding-left: 0;
}

/* 当鼠标离开所有一级分类时，隐藏非active分类的下拉菜单 */
.nav-menu:not(:hover) .dropdown:not(.active) .dropdown-menu {
    opacity: 0;
    visibility: hidden;
    /* transform: translateY(-10px); */
}

.nav-icons {
    display: flex;
    gap: 25px;
    margin-left: 60px;
}

.icon-link {
    color: white;
    text-decoration: none;
    font-size: 20px;
    font-weight: 100;
    /* transition: color 0.3s ease; */
    display: inline-block;
    vertical-align: middle;
    padding: 30px 0px;
}

.icon-link:hover {
    color: #e8eaf6;
}

/* 搜索容器样式 */
.search-container {
    position: relative;
    display: inline-block;
}

/* 搜索框默认隐藏 */
.search-box {
    position: absolute;
    /* right: 0; */
    left: -500%;
    top: 100%;
    margin-top: 5px;
    background-color: white;
    padding: 5px;
    border-radius: 4px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1001;
    display: none;
    min-width: 200px;
}

/* 搜索框输入样式 */
.search-box input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    outline: none;
    box-sizing: border-box;
}

/* 搜索框输入聚焦样式 */
.search-box input:focus {
    border-color: #4d6bff;
    box-shadow: 0 0 0 2px rgba(63, 81, 181, 0.1);
}

/* 搜索按钮激活状态 */
.search-btn.active + .search-box {
    display: block;
}

/* 语言容器样式 */
.language-container {
    position: relative;
    display: inline-block;
}

/* 语言下拉菜单默认隐藏 */
.language-dropdown {
    position: absolute;
    left: -50px;
    top: 100%;
    /* margin-top: 5px; */
    background-color: white;
    border-radius: 4px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1001;
    display: none;
    min-width: 200px;
}

/* 语言列表样式 */
.language-dropdown ul {
    list-style: none;
    padding: 5px 0;
    margin: 0;
}

/* 语言列表项样式 */
.language-dropdown ul li {
    margin: 0;
}

/* 语言链接样式 */
.language-dropdown ul li a {
    display: block;
    padding: 8px 15px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s ease;
}

/* 语言链接悬停样式 */
.language-dropdown ul li a:hover {
    background-color: #f5f5f5;
    color: #3f51b5;
}

/* 鼠标悬停在语言容器上显示下拉菜单 */
.language-container:hover .language-dropdown {
    display: block;
}

main {
    position: relative;
}

.hero {
    position: relative;
    height: 400px;
    overflow: hidden;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
}

/* 汉堡菜单样式 */
.hamburger {
    display: none;
    color: white;
    font-size: 30px;
    font-weight: 300;
    cursor: pointer;
}

/* 响应式设计 */
@media (max-width: 768px) {

    .nav-container {
        max-width: 1200px;
        margin: 0 auto;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 20px;
        /* height: 60px; */
    }
    .icon-link {
        color: white;
        text-decoration: none;
        font-size: 20px;
        font-weight: 100;
        /* transition: color 0.3s ease; */
        display: inline-block;
        vertical-align: middle;
        padding: 15px 0px;
    }

    .logo-image {
        height: 30px;
        width: auto;
        vertical-align: middle;
        display: block;
    }

    .hamburger {
        display: block;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: white;
        flex-direction: column;
        padding: 10px 0;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        gap: 5px;
    }

    .nav-menu.active {
        display: flex;
    }
    
    .nav-item {
        width: 100%;
        text-align: left;
    }
    
    .nav-link {
        padding: 10px 20px;
        display: block;
        color: #333;
        font-size: 16px;
    }
    
    .nav-link:hover,
    .dropdown.active > .nav-link {
        color: #3f51b5;
    }
    
    .dropdown-menu {
        position: static;
        min-width: 100%;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background-color: white;
        height: 0;
        overflow: hidden;
        /* transition: height 0.3s ease; */
    }
    
    .dropdown.active .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: none;
        height: auto;
        overflow: visible;
    }
    
    .dropdown-column {
        padding: 10px 20px;
        width: 100%;
        border-right: none;
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    }
    
    .dropdown-column h3 {
        color: #3f51b5;
    }
    
    .dropdown-column ul li a {
        color: #333;
    }
    
    .dropdown-column ul li a:hover {
        color: #3f51b5;
    }
    
    .sub-dropdown-menu, .sub-sub-dropdown-menu {
        position: static;
        min-width: 100%;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background-color: white;
        height: 0;
        overflow: hidden;
        /* transition: height 0.3s ease; */
    }
    
    .sub-dropdown.active > .sub-dropdown-menu,
    .sub-sub-dropdown.active > .sub-sub-dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: none;
        height: auto;
        overflow: visible;
    }
    
    .sub-dropdown-column, .sub-sub-dropdown-column {
        padding: 10px 30px 0;
        background-color: white;
    }
    
    .sub-dropdown-column h3, .sub-sub-dropdown-column h3 {
        color: #3f51b5;
        font-size: 13px;
    }
    
    .sub-dropdown-column ul li a, .sub-sub-dropdown-column ul li a {
        color: #333;
    }
    
    .sub-dropdown-column ul li a:hover,
    .sub-sub-dropdown-column ul li a:hover,
    .sub-sub-dropdown.active > a {
    color: #3f51b5;
    padding-left: 5px;
    }
    
    .sub-dropdown > a::after, .sub-sub-dropdown > a::after {
        display: none;
    }
    

}