/**
 * 导航菜单增强样式
 * 统一的PC端导航菜单样式(从重复代码中提取)
 */

/* ==================== 导航菜单增强 ==================== */
.main-nav {
    background: linear-gradient(135deg, #2E7D32 0%, #1B5E20 100%);
    box-shadow: 0 4px 12px rgba(0,0,0,.15);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-menu {
    display: flex;
    justify-content: center;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 4px;
}

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 14px 18px;
    color: white;
    text-decoration: none;
    font-size: 13.5px;
    font-weight: 500;
    transition: all .3s cubic-bezier(.4,0,.2,1);
    border-radius: 7px;
    white-space: nowrap;
}

.nav-menu > li > a i.fa-chevron-down {
    font-size: 11px;
    margin-left: 2px;
    transition: transform 0.3s ease;
}

.nav-menu > li:hover > a i.fa-chevron-down {
    transform: rotate(180deg);
}

.nav-menu > li > a:hover,
.nav-menu > li > a.active {
    background: rgba(255,255,255,0.15);
    transform: translateY(-2px);
}

.nav-menu > li > a.active {
    background: rgba(255,255,255,0.2);
}

/* 下拉菜单样式 */
.nav-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    opacity: 0;
    visibility: hidden;
    transition: all .3s cubic-bezier(.4,0,.2,1);
    min-width: 200px;
    padding: 6px;
    z-index: 1000;
}

.nav-dropdown::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid white;
}

.has-dropdown:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    top: 100%;
}

.nav-dropdown a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 14px;
    color: #333;
    text-decoration: none;
    border-radius: 7px;
    transition: all 0.2s ease;
    font-size: 13.5px;
}

.nav-dropdown a i {
    width: 18px;
    color: #2E7D32;
    font-size: 13.5px;
}

.nav-dropdown a:hover {
    background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
    color: #1B5E20;
    transform: translateX(4px);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1400px) {
    .nav-menu {
        gap: 4px;
    }

    .nav-menu > li > a {
        padding: 14px 16px;
        font-size: 13.5px;
    }
}

@media (max-width: 1200px) {
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-menu > li > a {
        padding: 12px 14px;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none; /* 移动端需要添加汉堡菜单 */
    }
}