@charset "utf-8";
/* CSS Document */
/* 主导航样式 */
.main-nav {
    display: flex;
    list-style: none;
    position: relative;
    justify-content: space-between;
    width: 100%;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 20px 24px;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    position: relative;
    border-bottom: 3px solid transparent;
    text-decoration: none;
}

.nav-link:hover {
    color: #fff;
    text-decoration: none;
}

/* 下拉菜单样式 */
.dropdown-menu {
    position: absolute;
    top: 72px;
    left: -40px;
    background: linear-gradient(to bottom, #ffffff 0%, #d2efff 100%);
    min-width: 220px;
    border-radius: 0 0 8px 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 100;
    padding: 15px 0;
}

/* 蓝色箭头 */
.dropdown-menu::before {
    content: "";
    position: absolute;
    top: -15px;
    left: 100px;
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid #288aee;
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    padding: 12px 24px;
    color: #373737;
    text-decoration: none;
    display: block;
    transition: all 0.3s ease;
    text-align: center;
    position: relative;
    z-index: 1;
    font-size: 16px;
}

.dropdown-item:hover {
    color: #fff;
    background: url(../images/nav_bgnew.png) left bottom no-repeat;
    text-decoration: none;
}

/* 首页特殊处理，没有下拉菜单 */
.nav-item:first-child .nav-link {
    color: #fff;
}