/* 占位容器 */
#ningmeng-nav-placeholder {
    height: 0;
}

/* 固定导航栏基础样式 */
#ningmeng-nav-navbar {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 50;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    background-color: #fff;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.home #ningmeng-nav-navbar {
    background-color: rgb(255 255 255 / 24%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.home #ningmeng-nav-navbar.scrolled {
    background-color: #fff;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

#ningmeng-nav-navbar.scrolled {
    padding: 3px 0;
    background-color: #fff;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
                0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* 导航容器 */
#ningmeng-nav-navbar nav {
    max-width: 1440px;
    margin: 0 auto;
    padding: 1rem 5%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

@media (max-width: 767px) {
    #ningmeng-nav-navbar nav {
        padding: 10px 5%;
    }
}

/* Logo 样式 */
.ningmeng-nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
    font-family: 'Poppins', sans-serif;
    flex-shrink: 0;
}

@media (max-width: 767px) {
    .ningmeng-nav-logo {
        font-size: 1.25rem;
    }
}

.ningmeng-nav-logo a {
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
}

.ningmeng-nav-logo a:hover {
    transform: scale(1.05);
    color: var(--color-primary);
}

/* 桌面导航菜单 */
.ningmeng-nav-desktop-menu {
    display: none;
}

@media (min-width: 768px) {
    .ningmeng-nav-desktop-menu {
        display: flex;
        align-items: center;
    }
}

.ningmeng-nav-desktop-menu ul {
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
    align-items: center;
}

@media (max-width: 1023px) and (min-width: 768px) {
    .ningmeng-nav-desktop-menu ul {
        gap: 1.5rem;
    }
}

.ningmeng-nav-desktop-menu a {
    text-decoration: none;
    color: var(--color-dark);
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

.ningmeng-nav-desktop-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

.ningmeng-nav-desktop-menu a:hover {
    color: var(--color-primary);
}

.ningmeng-nav-desktop-menu a:hover::after {
    width: 100%;
}

/* 联系我们按钮 */
.ningmeng-nav-contact-btn {
    display: inline-block;
    background-color: var(--color-primary);
    color: #fff !important;
    padding: 0.5rem 1.5rem;
    border-radius: 9999px;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    margin-left: 1rem;
    white-space: nowrap;
}

@media (max-width: 1023px) and (min-width: 768px) {
    .ningmeng-nav-contact-btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

.ningmeng-nav-contact-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.ningmeng-nav-contact-btn:hover {
    background-color: var(--color-primary-dark);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.ningmeng-nav-contact-btn:hover::before {
    width: 300px;
    height: 300px;
}

.ningmeng-nav-contact-btn:active {
    transform: translateY(0);
}

/* 移动端菜单按钮 */
.ningmeng-nav-menu-toggle {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px 10px;
    background-color: rgba(255, 84, 115, 0.1);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.ningmeng-nav-menu-toggle:hover {
    transform: scale(1.1);
}

.ningmeng-nav-menu-toggle i {
    transition: transform 0.3s ease;
    font-size: 18px;
    color: #ff5473;
}

.ningmeng-nav-menu-toggle i.fa-times {
    transform: rotate(180deg);
}

@media (min-width: 768px) {
    .ningmeng-nav-menu-toggle {
        display: none;
    }
}

/* 移动端导航菜单 */
#ningmeng-nav-mobile-menu {
    position: absolute;
    width: 100%;
    left: 0;
    top: 100%;
    background-color: #fff;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.4s ease;
    pointer-events: none;
    z-index: 40;
}

#ningmeng-nav-mobile-menu.active {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.ningmeng-nav-container {
    padding: 1rem 5%;
}

#ningmeng-nav-mobile-menu ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin: 0;
    padding: 0;
}

#ningmeng-nav-mobile-menu .ningmeng-nav-contact-btn {
    margin-top: 1rem;
    text-align: center;
}

@media (min-width: 768px) {
    #ningmeng-nav-mobile-menu .ningmeng-nav-contact-btn {
        display: none;
    }
}

#ningmeng-nav-mobile-menu a {
    display: block;
    text-decoration: none;
    color: var(--color-dark);
    padding: 0.5rem 0;
    transition: all 0.3s ease;
    transform: translateX(-10px);
    opacity: 0;
}

#ningmeng-nav-mobile-menu.active a {
    transform: translateX(0);
    opacity: 1;
}

#ningmeng-nav-mobile-menu a:hover {
    color: var(--color-primary);
    padding-left: 0.5rem;
}

/* 菜单项动画延迟 */
#ningmeng-nav-mobile-menu a:nth-child(1) { transition-delay: 0.1s; }
#ningmeng-nav-mobile-menu a:nth-child(2) { transition-delay: 0.2s; }
#ningmeng-nav-mobile-menu a:nth-child(3) { transition-delay: 0.3s; }
#ningmeng-nav-mobile-menu a:nth-child(4) { transition-delay: 0.4s; }
#ningmeng-nav-mobile-menu a:nth-child(5) { transition-delay: 0.5s; }