/* ==================== 1. 头部基础配置与动态背景切换 ==================== */
header.yn-site-header, .yn-site-header {
    width: 100% !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    z-index: 9999 !important;
    box-sizing: border-box;
    display: block;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease !important;
}

/* 初始最顶部状态：完全透明 */
.yn-site-header.yn-header-transparent {
    background-color: transparent !important;
    border-bottom: 1px solid transparent !important;
    box-shadow: none !important;
}

/* 下拉或鼠标滑入激活状态 */
.yn-site-header.yn-header-active {
    background-color: rgba(255, 255, 255, 0.95) !important;
    border-bottom: 1px solid #eeeeee !important;
    backdrop-filter: blur(8px);
}

.yn-header-container {
    width: 100% !important;
    max-width: 100% !important;
    margin: 0;
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    height: 100px;
    box-sizing: border-box;
    position: relative;
    background-color: rgba(255, 255, 255, 0.95) !important;
}
.yn-logo-area img {
    height: 60px;
    width: auto;
    display: block;
}

/* ==================== 2. 右侧核心区 ==================== */
.yn-header-right {
    display: flex;
    align-items: center;
    gap: 25px;
    flex-shrink: 0;
}
/* 语言切换容器 */
.yn-lang-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding-bottom: 8px; /* 增加下方热区缓冲区，防止鼠标滑向下拉框时断开 hover */
  margin-bottom: -8px; 
}

/* 地球图标按钮 */
.yn-lang-btn {
  color: #00828a; /* 图标主色，可自行修改 */
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  cursor: pointer;
  transition: color 0.3s ease;
}


.yn-lang-btn:hover {
  color: #005a60;
}

.yn-lang-btn img{
    height: 40px;
    width: auto;
    z-index: 2;
    margin-right: 20px;
}
@media (max-width: 1920px){.yn-lang-btn img{height: 23px;}}

.yn-lang-icon {
  display: block;
}

/* 下拉菜单面板 */
.yn-lang-dropdown {
  position: absolute;
  top: 100%;
  right: 50%;
  transform: translateX(50%); /* 水平居中对齐图标 */
  background-color: #ffffff;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.08);
  padding: 8px 0;
  min-width: 100px;
  display: flex;
  flex-direction: column;
  z-index: 999;
  
  /* 隐藏与过渡设置 */
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
  margin-top: 2px;
}

/* 顶部小三角箭头 */
.yn-lang-dropdown::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 6px solid #ffffff;
}

/* 鼠标悬停容器时显示下拉框 */
.yn-lang-switch:hover .yn-lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(50%) translateY(0);
}

/* 菜单项样式 */
.yn-lang-item {
  color: #333333;
  font-size: 22pt;
  font-weight: 500;
  text-decoration: none;
  padding: 8px 16px;
  text-align: center;
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease;
}
@media(max-width: 2300px){
        .yn-lang-item {font-size: 18pt !important;}
    }
    @media(max-width: 1920px){
        .yn-lang-item {font-size: 15pt !important;}
    }
    @media(max-width: 1440px){
        .yn-lang-item {font-size: 14pt !important;}
    }

.yn-lang-item:hover {
  background-color: #f5f7fa;
  color: #00828a;
}
.yn-lang-item {
    color: #666 !important;
    text-decoration: none;
    transition: color 0.2s;
}
.yn-lang-item:hover {
    color: #00a9e0 !important;
}
.yn-lang-split {
    color: #00a9e0;
}

/* 搜索容器 */
.yn-search-wrap {
    display: inline-flex !important;
    align-items: center !important;
    position: relative !important;
}
.yn-search-wrap form {
    display: block !important;
    margin: 0 !important;
    padding: 0 !important;
}
.yn-search-box {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-end !important;
    position: relative !important;
    background-color: transparent;
    border-radius: 30px !important;
    padding: 2px !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    width: 40px !important;
    height: 40px !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
}
.yn-search-box.yn-search-active {
    width: 240px !important;
    background-color: rgba(0, 169, 224, 0.08) !important;
    padding: 2px 6px 2px 15px !important;
}
.yn-search-input {
    width: 0 !important;
    border: none !important;
    background: none !important;
    outline: none !important;
    font-size: 1rem !important;
    color: #333333 !important;
    padding: 6px 0 !important;
    opacity: 0 !important;
    visibility: hidden !important;
    transition: width 0.3s ease, opacity 0.2s ease !important;
    height: 100% !important;
}
.yn-search-box.yn-search-active .yn-search-input {
    width: calc(100% - 38px) !important;
    opacity: 1 !important;
    visibility: visible !important;
}
.yn-search-btn {
    min-width: 0 !important;
    max-width: none !important;
    width: 34px !important;
    height: 34px !important;
    padding: 0 !important;
    margin: 0 !important;
    background: none !important;
    border: none !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer !important;
    color: #00a9e0 !important;
    transition: color 0.2s;
}
.yn-search-btn img {
    width: 40px !important;
    height: 40px !important;
    display: block;
    fill: currentColor;
}

    @media(max-width: 1920px){
        .yn-search-btn img {width: 23px !important;height: 23px !important;}
    }

.yn-search-btn:hover, .yn-search-box.yn-search-active .yn-search-btn {
    color: #69bd45 !important;
}

.yn-m-arrow {
    display: none !important;
    font-style: normal;
    font-family: Consolas, Monaco, monospace !important;
    font-size: 1.5rem !important;
    font-weight: bold !important;
    line-height: 1;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
    transform-origin: center center !important;
}

/* ==================== 3. PC 端大环境导航框架 (> 960px) ==================== */

    .yn-nav-toggle { display: none !important; }
    .yn-main-nav-bar {
        height: 100%;
        flex-grow: 1;
        display: flex !important;
        justify-content: center;
    }
    
    .yn-menu {
        display: flex;
        height: 100%;
        align-items: center;
        margin: 0;
        padding: 0;
        list-style: none;
    }
    .yn-menu > li {
        height: 100%;
        display: flex;
        align-items: center;
        position: static !important;
    }
    
    .yn-menu > li > a {
        padding: 0 24px;
        font-size: 22pt !important;
        color: #00a9e0 !important;
        line-height: 80px;
        height: 80px;
        text-decoration: none;
        display: flex;
        align-items: center;
        box-sizing: border-box;
        transition: color 0.2s;
        position: relative;
    }
    @media(max-width: 2300px){
        .yn-menu > li > a {font-size: 18pt !important;}
    }
    @media(max-width: 1920px){
        .yn-menu > li > a {font-size: 15pt !important;}
    }
    @media(max-width: 1440px){
        .yn-menu > li > a {font-size: 14pt !important;}
    }
    
    .yn-menu > li:hover > a {
        color: #69bd45 !important;
    }

    /* 全域大面板 */
    .yn-mega-panel {
        position: absolute;
        top: 100px;
        left: 0;
        width: 100%;
        background-color: #ffffff; 
        border-top: 1px solid #f0f0f0;
        border-bottom: 1px solid #e5e5e5;
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.06);
        display: block !important;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: opacity 0.2s ease, visibility 0.2s ease;
        z-index: 9999;
    }
    .yn-menu > li:hover .yn-mega-panel {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    /* ------------------------------------------------------------
       【重点调整】架构 A：扁平化流式平铺 —— 增加全容器居中支持
       ------------------------------------------------------------ */
    .yn-flat-layout {
        max-width: 1440px;
        margin: 0 auto;
        padding: 35px 40px;
        box-sizing: border-box;
        display: flex !important;
        justify-content: center !important; /* 确保外层容器居中 */
    }
    .yn-menu-l2-flat {
        width: auto !important; /* 紧凑包裹内容以实现居中 */
        display: flex !important;
        flex-wrap: wrap !important;
        justify-content: center !important; /* 确保子项行内绝对居中 */
        gap: 55px !important; /* 稍微拉开间距，更显大气 */
        margin: 0 !important;
        padding: 0 !important;
        list-style: none !important;
    }
    .yn-menu-l2-flat li a {
        font-size: 21pt !important;
        color: #00a9e0 !important;
        text-decoration: none;
        transition: color 0.2s;
        display: block;
    }
    @media(max-width: 2300px){
        .yn-menu-l2-flat li a {font-size: 17pt !important;}
    }
    @media(max-width: 1920px){
        .yn-menu-l2-flat li a {font-size: 14pt !important;}
    }
    @media(max-width: 1440px){
        .yn-menu-l2-flat li a {font-size: 13pt !important;}
    }
    .yn-menu-l2-flat li a:hover {
        color: #69bd45 !important;
    }

    /* 架构 B：左二级垂直、右三级独立面板分离系统 */
    .yn-split-layout {
        display: flex !important;
        width: 100%;
    }
    .yn-split-left-l2 {
        width: 30%;
        background-color: #fafbfc;
        border-right: 1px solid #f0f2f5;
        padding: 20px 0;
        flex-shrink: 0;
    }
    .yn-l2-v-menu { margin: 0; padding: 0; list-style: none; }
    .yn-l2-v-item { position: relative; }
    .yn-l2-v-item a {
        display: block;
        padding: 14px 35px;
        font-size: 21pt !important;
        color: #00a9e0 !important;
        text-decoration: none;
        transition: all 0.2s ease;
    }
    
    .yn-l2-v-item:hover a, .yn-l2-v-item.active a {
        background-color: #ffffff;
        color: #69bd45 !important;
        font-size: 21pt !important;;
    }
    @media(max-width: 2300px){
        .yn-l2-v-item a {font-size: 17pt !important;}
        .yn-l2-v-item:hover a, .yn-l2-v-item.active a {font-size: 17pt !important;}
    }
    @media(max-width: 1920px){
        .yn-l2-v-item a {font-size: 14pt !important;}
        .yn-l2-v-item:hover a, .yn-l2-v-item.active a {font-size: 14pt !important;}
    }
    @media(max-width: 1440px){
        .yn-l2-v-item a {font-size: 13pt !important;}
        .yn-l2-v-item:hover a, .yn-l2-v-item.active a {font-size: 13pt !important;}
    }
    .yn-l2-v-item.active::before {
        content: "";
        position: absolute;
        left: 0;
        top: 0;
        width: 4px;
        height: 100%;
        background-color: #69bd45;
    }

    .yn-split-right-l3 {
        flex-grow: 1;
        padding: 35px 45px 25px 45px;
        background-color: #ffffff;
    }
    .yn-l3-pane {
        display: none !important;
        animation: ynFade 0.15s ease-out forwards;
        height: 100%;
    }
    .yn-l3-pane.active {
        display: flex !important;
        flex-direction: column;
        justify-content: space-between;
    }
    @keyframes ynFade {
        from { opacity: 0; transform: translateY(2px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .yn-l3-grid-wrap {
        display: grid !important;
        grid-template-columns: repeat(3, minmax(240px, 1fr)) !important;
        gap: 16px 24px !important;
        margin-bottom: 30px;
    }
    .yn-l3-single-box {
        background-color: #f5f7fa !important;
        border: 1px solid #eef1f6 !important;
        border-radius: 6px !important;
        padding: 16px 20px !important;
        box-sizing: border-box !important;
        transition: all 0.2s ease;
    }
    .yn-l3-single-box:hover {
        background-color: #edf1f7 !important;
        border-color: #dbe2ef !important;
    }
    .yn-l3-single-box a {
        font-size: 21pt !important;
        color: #00a9e0 !important;
        text-decoration: none !important;
        display: block !important;
        width: 100% !important;
    }
    @media(max-width: 2300px){
        .yn-l3-single-box a {font-size: 17pt !important;}
    }
    @media(max-width: 1920px){
        .yn-l3-single-box a {font-size: 14pt !important;}
    }
    @media(max-width: 1440px){
        .yn-l3-single-box a {font-size: 13pt !important;}
    }

    .yn-mega-footer-zone {
        margin-top: auto !important;
        padding-top: 20px !important;
        border-top: 1px solid #eaedf3 !important;
        display: flex !important;
        align-items: center !important;
        justify-content: space-between !important;
        width: 100% !important;
        box-sizing: border-box;
    }
    .yn-footer-info-left { display: flex !important; flex-direction: column !important; gap: 6px !important; }
    .yn-info-item { display: flex !important; align-items: center !important; font-size: 1rem !important; color: #666666; }
    .yn-info-label { color: #888888 !important; font-weight: 500 !important; flex-shrink: 0; }
    .yn-info-value { color: #00a9e0 !important; font-weight: 600 !important; text-decoration: none !important; font-size:1.5rem;}
    a.yn-info-value:hover { color: #00a9e0 !important; }
    .yn-contact-us-btn {
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 9px 24px !important;
        font-size: 13px !important;
        font-weight: 600 !important;
        color: #ffffff !important;

        background-color: #69bd45 !important;
        border-radius: 4px !important;
        text-decoration: none !important;
        transition: all 0.25s ease !important;
    }
    .yn-contact-us-btn:hover { background-color: #00a9e0 !important; transform: translateY(-1px) !important; }




/* ==================== 4. ?? 移动端自适应重置体系 (<= 960px) ==================== */
@media (max-width: 960px) {
    header.yn-site-header, .yn-site-header {
        background-color: #ffffff !important;
        border-bottom: 1px solid #eeeeee !important;
    }
    .yn-logo-area img { height: 28px; }
    .yn-header-container { height: 60px; padding: 0 20px; }
    .yn-header-right { margin-right: 55px; gap: 15px; }

    .yn-nav-toggle {
        display: block !important;
        position: absolute;
        right: 20px;
        top: 19px;
        width: 24px;
        height: 22px;
        cursor: pointer;
        z-index: 10000;
    }
    .yn-nav-toggle span {
        display: block;
        position: absolute;
        height: 3px;
        width: 100%;
        background-color: #00a9e0;
        border-radius: 3px;
        left: 0;
        transition: .25s ease-in-out;
    }
    .yn-nav-toggle span:nth-child(1) { top: 0px; }
    .yn-nav-toggle span:nth-child(2) { top: 8px; }
    .yn-nav-toggle span:nth-child(3) { top: 16px; }
    
    .yn-nav-toggle.open span:nth-child(1) { top: 8px; transform: rotate(135deg); background-color: #69bd45; }
    .yn-nav-toggle.open span:nth-child(2) { opacity: 0; left: -40px; }
    .yn-nav-toggle.open span:nth-child(3) { top: 8px; transform: rotate(-135deg); background-color: #69bd45; }

    .yn-main-nav-bar {
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;

    height: auto !important;
    flex-grow: 0 !important;

    background-color: #ffffff;
    max-height: 0;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease-in-out;
    border-top: 1px solid #f0f0f0;
    z-index: 999;
    display: block !important;
}
    .yn-main-nav-bar.yn-open {
    max-height: calc(100vh - 60px);
    opacity: 1;
    visibility: visible;
}

.yn-menu {
    display: block;
    width: 100%;
    padding: 0;
    margin: 0;
    list-style: none;
}
    .yn-menu > li {
    display: block !important;
    position: relative !important;
    height: auto !important;
    width: 100% !important;
    border-bottom: 1px solid #f5f5f5;
    margin: 0 !important;
    padding: 0 !important;
}
    
    .yn-menu > li > a {
        padding: 16px 20px !important;
        color: #00a9e0 !important;
        display: flex;
        justify-content: space-between;
        align-items: center;
        text-decoration: none;
        background-color: #ffffff;
    }
    .yn-menu > li.open > a {
        color: #69bd45 !important;
        background-color: #fcfdfe;
    }

    .yn-m-arrow {
        display: inline-flex !important;
    }
    .yn-m-arrow::after {
        content: ">" !important;
        display: block !important;
    }
    .yn-has-child.open > a > .yn-m-arrow,
    .yn-l2-v-item.open > a > .yn-m-arrow {
        transform: rotate(90deg) !important;
        color: #69bd45 !important;
    }

    .yn-mega-panel {
    position: static !important;
    top: auto !important;
    left: auto !important;
    width: 100% !important;
    display: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    transform: none !important;
    background-color: #fafbfc !important;
    border: none !important;
    box-shadow: none !important;
    margin: 0 !important;
}
.yn-has-child:not(.open) > .yn-mega-panel {
    display: none !important;
}
    .yn-has-child.open > .yn-mega-panel { display: block !important; }

    /* 移动端恢复流式级联，不影响居中 */
    .yn-flat-layout { padding: 10px 0 !important; width: 100% !important; display: block !important;}
    .yn-menu-l2-flat { display: block !important; width: 100% !important; padding: 0 !important; margin: 0 !important; }
    .yn-menu-l2-flat li { width: 100% !important; border-bottom: 1px solid #f0f2f5 !important; }
    .yn-menu-l2-flat li:last-child { border-bottom: none !important; }
    
    .yn-menu-l2-flat li a {
        display: block !important;
        padding: 14px 35px !important; 

        color: #00a9e0 !important;

        text-decoration: none !important;
        background-color: #fafbfc !important;
    }
    .yn-menu-l2-flat li a:hover { color: #69bd45 !important; background-color: #f5f7fa !important; }

    .yn-split-layout, .yn-split-left-l2, .yn-l2-v-menu {
        position: static !important;
        display: block !important;
        width: 100% !important;
        background: none !important;
        padding: 0 !important;
        border: none !important;
        margin: 0 !important;
    }

    .yn-l2-v-item { display: block !important; width: 100% !important; border-bottom: 1px solid #f0f0f0; }
    .yn-l2-v-item a {
        display: flex !important;
        justify-content: space-between;
        align-items: center;
        padding: 14px 20px !important;
        color: #00a9e0 !important;
        background-color: #ffffff !important;
        text-decoration: none;
    }
    .yn-l2-v-item.open > a {
        color: #69bd45 !important;
        background-color: #f5f7fa !important;
    }

    .yn-split-right-l3 {
        display: none !important; 
        width: 100% !important;
        padding: 0 !important;
        background-color: #fafbfc !important;
        border: none !important;
    }
    .yn-l3-pane { display: none !important; width: 100% !important; }

    .yn-split-right-l3.yn-active-holder { display: block !important; background-color: #fafbfc !important; }
    .yn-l3-pane.yn-active-pane { display: block !important; }

    .yn-l3-grid-wrap { display: block !important; width: 100% !important; margin: 0 !important; }
    .yn-l3-single-box { display: block !important; width: 100% !important; background: none !important; border: none !important; padding: 0 !important; }
    .yn-l3-single-box a {
        display: block !important;
        padding: 12px 38px !important;
        font-size: 0.95rem !important;
        color: #00a9e0 !important;
        background-color: #fafbfc !important;
        border-bottom: 1px solid #f1f3f7 !important;
        text-decoration: none !important;
        font-weight: normal !important;
    }
    .yn-l3-single-box:last-child a { border-bottom: none !important; }
    
    .yn-mega-footer-zone { display: none !important; }
}

@media (max-width:1299px){


		.yn-lang-switch{font-size: 1.1rem !important;}
		}
@media (max-width:1170px){


		.yn-lang-switch{font-size: 1rem !important;}
		}
@media (max-width:1080px){


		.yn-lang-switch{font-size: 0.8rem !important;}
		}