/*
.nav-item {
  position: relative;
  margin-right:2rem;
}

.navbar-collapse ul li a.nav-link:before {
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: transparent;
    content: '';
    opacity: 0;
    -ms-transition: opacity 0.3s, -webkit-transform 0.3s;
    -webkit-transition: opacity 0.3s, -webkit-transform 0.3s;
    transition: opacity 0.3s, transform 0.3s;
    -ms-transform: translateY(10px);
    -webkit-transform: translateY(10px);
    transform: translateY(10px);
}

.navbar-collapse ul li:hover a.nav-link:before {
	opacity: 1;
	-ms-transform: translateY(0px);
	-webkit-transform: translateY(0px);
	transform: translateY(0px);
	bottom: 0px;
	background: #009dd9;
}

.dropdown-item:hover, .dropdown-item:focus {
    color: #ffffff;
    text-decoration: none;
    background-color: #009dd9;
}

.dropdown-menu {
  border: 0px;
}
*/

/*
.header-area {
    background: #fff;
    border-bottom: 1px solid #eee;
}
.navbar {
  display: flex;
  align-items: center;
}

.navbar-nav {
    list-style: none;
    display: flex;
    padding: 0;
    margin: 0;
}
.navbar-nav .nav-item {
  margin-right: 2.3rem;
}
.navbar-nav .nav-item a {
  font-size: 1.3rem;
  color:#035540;
}

.navbar-expand-lg{
  height:8rem;
  border-bottom: .3rem solid #035540;
  display: flex;
}
.navbar-expand-lg .logo{
  margin:2rem 0 0 0;
  display: inline-block;
}
.navbar-expand-lg .logo img{
  width:16rem;
  height:auto;
}


.header-wrap {
  float: right;
  display: inline-block;
  margin-top: 1.5rem;
}

.header-wrap .navbar .navbar-nav .nav-item {
    position: relative;
    margin: 1.2rem;
}
.header-wrap .navbar .navbar-nav .nav-item a {
    font-size: 1.2rem;
    color: #333;
}
.header-wrap .navbar .navbar-nav .nav-item a i {
    font-size: 0.9rem;
}
.header-wrap .navbar .navbar-nav .nav-item a i img {
    width: 0.8rem;
    vertical-align: top;
    margin-top: 0.2rem;
}
*/

/* 一级下拉菜单 
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu {
    display: block !important;
    border: none;
    top: 2.5rem;
    left: 0rem;
    z-index: 99;
    opacity: 0;
    width: 13.5rem;
    border-radius: 0;
    padding: 5px 0;
    position: absolute;
    visibility: hidden;
    -webkit-box-shadow: 0 0 15px 0 rgba(0, 0, 0, 0.1);
    box-shadow: 0 0 15px 0 rgba(0, 0, 0, 0.1);
    -webkit-transition: 0.5s;
    transition: 0.5s;
    -webkit-transform: rotateX(-75deg);
    transform: rotateX(-75deg);
    -webkit-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transform-origin: 0% 0%;
    transform-origin: 0% 0%;
    background: #fff;
    list-style: none;
    margin: 0;
}
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li {
    margin: 0;
    position: relative; 
}


.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a {
    padding: 10px 20px;
    position: relative;
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    -webkit-transition: 0.3s;
    transition: 0.3s;
    color: #333;
}
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a:before {
    position: absolute;
    top: 50%;
    left: 1rem;
    content: "";
    width: 0.2rem;
    height: 0%;
    background-color: #035540;
    visibility: hidden;
    opacity: 0;
    -webkit-transform: translateY(-50%);
    transform: translateY(-50%);
    -webkit-transition: 0.4s;
    transition: 0.4s;
}


.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a:hover,
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a.active,
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li:hover > a {
  color: #035540;
  padding-left: 2rem;
}
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a:hover:before,
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a.active:before,
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li:hover > a:before {
  height: 1rem;
  visibility: visible;
  opacity: 1;
}
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a.active,
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a:hover {
    padding-left: 2rem;
}
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a:hover,
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a:focus,
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a.active {
    width: 100%;
    right: auto;
    left: 0;
}
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li a i {
    margin: 0;
    position: absolute;
    top: 55%;
    font-size: 16px;
    line-height: 1;
    -webkit-transform: translateY(-50%);
    transform: translateY(-50%);
    right: 15px;
}
*/

/* 二级下拉菜单 
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li .dropdown-menu {
    top: 0;
    opacity: 0;
    left: -250px;
    right: auto;
    visibility: hidden;
}
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li .dropdown-menu {
  top: 0;
  left: 100%;                       
  right: auto;
  opacity: 0;
  visibility: hidden;
  display: block !important;
  transform: none;
  -webkit-transform: none;
  transform-origin: 0% 0%;
  -webkit-transform-origin: 0% 0%;
  transform-style: flat;
  -webkit-transform-style: flat;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  -webkit-transition: opacity 0.25s ease, visibility 0.25s ease;
}
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li .dropdown-menu:hover {
  opacity: 1;
  visibility: visible;
}

.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li:hover > .dropdown-menu {
  opacity: 1;
  visibility: visible;
}
.header-wrap .navbar .navbar-nav .nav-item .dropdown-menu li:has(> .dropdown-menu)::after {
  content: "";
  position: absolute;
  top: 0;
  left: 100%;
  width: 20px;           
  height: 100%;
  z-index: 98;
  pointer-events: auto;  
  background: transparent;
}
*/

/* 一级菜单悬停显示 
.header-wrap .navbar .navbar-nav .nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    -webkit-transform: rotatex(0deg);
    transform: rotatex(0deg);
}

.content {
    padding: 60px 20px;
    text-align: center;
    color: #666;
}
.content h2 {
    color: #333;
    margin-bottom: 10px;
}
*/


    
.header {
    position: relative;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem;
    height: 8rem;
    /* max-width: 1200px; */
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: white;
    flex-shrink: 0;
}

.header .logo img {
    width: 18rem;
}


/* ========== PC桌面端样式 (默认) ========== */
/* 隐藏移动端专用元素 */
.hamburger,
.close-menu,
.overlay {
    display: none;
}

#menu-toggle {
    display: none;
}

/* 导航菜单容器 - 桌面端静态显示 */
.nav-menu {
    position: static;
    width: auto;
    background: transparent;
}

/* ===== 一级菜单样式 ===== */
/* 只选择 .nav-menu 的直接子 ul（一级菜单容器） */
.nav-menu > ul {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

/* 一级菜单项 */
.nav-menu > ul > li {
    position: relative;
    margin: 0;
}

/* 一级菜单链接/标签（无子菜单 & 有子菜单） */
.nav-menu .simple-link,
.nav-menu .dropdown-label {
    display: block;
    padding: 0;
    font-size: 1.2rem;
    font-weight: 500;
    color: #035540;
    text-decoration: none;
    cursor: pointer;
    transition: color 0.2s;
}

.nav-menu .simple-link:hover,
.nav-menu .dropdown-label:hover {
    color: #f39c12;
}

/* 下拉箭头（桌面端默认向下） */
.dropdown-label {
    display: flex;
    align-items: center;
    gap: 6px;
}
.dropdown-label::after {
    content: '';
    width: .4rem;
    height: .4rem;
    border-right: .15rem solid #96d7c7;
    border-bottom: .15rem solid #96d7c7;
    transform: rotate(45deg);
    transition: transform 0.2s;
    float: right;
    margin: .9rem 0 0 .5rem;
}

/* ===== 二级菜单样式 ===== */
.sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 180px;
    border-radius: 8px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    z-index: 200;
    display: block;
    list-style: none;
    padding: 8px 0;
    margin: 0;
}

.sub-menu li {
    display: block;
    width: 100%;
    border-bottom: 1px solid #f0f0f0;
}
.sub-menu li:last-child {
    border-bottom: none;
}

.sub-menu a {
    display: block;
    padding: 10px 16px;
    color: #2c3e50;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s;
    white-space: nowrap;
}
.sub-menu a:hover {
    background: #f8f9fa;
    color: #e67e22;
    padding-left: 22px;
}

/* 桌面端悬停展开二级菜单 */
.has-dropdown:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
}

/* 悬停时箭头旋转（向下 -> 向上） */
.has-dropdown:hover > .dropdown-label::after {
    transform: rotate(225deg);
}

/* 移动端控制二级菜单的复选框在桌面端隐藏 */
.dropdown-checkbox {
    display: none;
}

/* ========== 移动端适配 (max-width: 768px) ========== */
@media (max-width: 768px) {

    .header-inner {
       height: auto;
    }

    .navbar-expand-lg {
      height: 6rem;
      border-bottom: .2rem solid #035540;
    }
    .navbar-expand-lg .logo {
      margin: 1.2rem 0 0 1rem;
      float: right;
    }
    .navbar-expand-lg .logo img {
      width: 12rem;
    }


    .hamburger,
    .close-menu,
    .overlay {
        display: block;
    }

    .hamburger {
      cursor: pointer;
      width: 2rem;
      height: 2rem;
      position: relative;
      z-index: 300;
      margin: 2rem 0 0 0;
    }
    .hamburger span {
        display: block;
        position: absolute;
        height: .25rem;
        width: 100%;
        background: #035540;
        transition: all 0.2s ease;
    }
    .hamburger span:nth-child(1) { top: 0; }
    .hamburger span:nth-child(2) { top: 10px; }
    .hamburger span:nth-child(3) { top: 20px; }

    #menu-toggle {
        display: none;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 85%;
        max-width: 320px;
        height: 100%;
        background: #fff;
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        z-index: 150;
        padding: 70px 20px 30px;
        overflow-y: auto;
        box-shadow: 2px 0 15px rgba(0,0,0,0.2);
    }

    .nav-menu > ul {
        display: block;
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .nav-menu > ul > li {
        margin-bottom: 5px;
        border-bottom: 1px solid #eee;
        position: static;
    }

    .nav-menu .simple-link,
    .nav-menu .dropdown-label {
        padding: 12px 0;
        font-size: 1rem;
        color: #2c3e50;
    }

    /* 移动端箭头默认朝上（表示收起状态） */
    .dropdown-label::after {
        border-right-color: #7f8c8d;
        border-bottom-color: #7f8c8d;
        transform: rotate(225deg); /* 默认箭头向上 */
    }

    .sub-menu {
        position: static;
        background: #f8f9fa;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        padding: 0;
        margin: 0 0 0 15px;
        border-radius: 6px;
        display: block;
    }

    .sub-menu li {
        border-bottom: 1px solid #e9ecef;
    }
    .sub-menu a {
        padding: 10px 0 10px 15px;
        white-space: normal;
    }

    .dropdown-checkbox {
        display: none;
    }
    /* 展开时 max-height 变大，箭头朝下 */
    .dropdown-checkbox:checked ~ .sub-menu {
        max-height: 300px;
    }
    .dropdown-checkbox:checked ~ .dropdown-label::after {
        transform: rotate(45deg); /* 展开时箭头向下 */
    }

    .overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        opacity: 0;
        visibility: hidden;
        transition: 0.3s;
        cursor: pointer;
    }

    #menu-toggle:checked ~ .header .nav-menu {
        transform: translateX(0);
    }
    #menu-toggle:checked ~ .overlay {
        opacity: 1;
        visibility: visible;
    }

    #menu-toggle:checked ~ .header .hamburger span:nth-child(1) {
        transform: rotate(45deg);
        top: 10px;
    }
    #menu-toggle:checked ~ .header .hamburger span:nth-child(2) {
        opacity: 0;
    }
    #menu-toggle:checked ~ .header .hamburger span:nth-child(3) {
        transform: rotate(-45deg);
        top: 10px;
    }

    .close-menu {
        position: absolute;
        top: 18px;
        right: 20px;
        font-size: 28px;
        cursor: pointer;
        color: #2c3e50;
        width: 30px;
        height: 30px;
        text-align: center;
        line-height: 30px;
        z-index: 160;
    }
}