/* 基础样式 - 导航条公共样式 */

/* 头部导航 - 公共样式 */
.navbar {
    background: transparent !important;
    padding: 0.5rem 0;
    transition: all 0.3s ease;
    min-height: 60px;
    height: auto;
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.9) !important;
    backdrop-filter: blur(10px);
}

.navbar-brand {
    text-decoration: none;
    display: flex;
    align-items: center;
    height: 40px;
}

.logo-img {
    height: 20px;
    width: auto;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.6) !important;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.4rem 0.8rem !important;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--white) !important;
}

/* 被选中的nav-item样式 */
.navbar-nav .nav-link.active {
    color: var(--white) !important;
    font-weight: 600;
}

/* AI实验室链接样式 */
.navbar-nav .ai-lab-link {
    font-weight: 500;
    transition: all 0.3s ease;
}

.navbar-nav .ai-lab-link .ai-text {
    background: linear-gradient(53.168679969115246deg, #7E74FF 0%, #D97AFF 28%, #5EFDFF 59%, #60FCFE 77%, #FFA2A2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}

.navbar-nav .ai-lab-link:hover .ai-text {
    background: linear-gradient(53.168679969115246deg, #7E74FF 0%, #D97AFF 28%, #5EFDFF 59%, #60FCFE 77%, #FFA2A2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

/* AI实验室链接选中状态样式 */
.navbar-nav .ai-lab-link.active {
    color: var(--white) !important;
    font-weight: 600;
}

.navbar-nav .ai-lab-link.active .ai-text {
    background: linear-gradient(53.168679969115246deg, #7E74FF 0%, #D97AFF 28%, #5EFDFF 59%, #60FCFE 77%, #FFA2A2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.navbar-nav .btn-outline-light {
    border-color: var(--white);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.navbar-nav .btn-outline-light:hover {
    background: var(--white);
    color: var(--dark-bg);
}

/* 移动端导航栏样式 */
@media (max-width: 991.98px) {
    /* 固定导航栏高度，防止展开时变化 */
    .navbar {
        min-height: 60px !important;
        height: 60px !important;
    }
    
    /* 1. logo和navbar-toggler的左右边距一致 */
    .navbar-brand {
        position: absolute;
        top: 50%;
        left: 15px;
        transform: translateY(-50%);
    }
    
    .navbar-toggler {
        position: absolute;
        top: 50%;
        right: 15px;
        transform: translateY(-50%);
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
    }
    
    .navbar-toggler-icon {
        width: 1.2em !important;
        height: 1.2em !important;
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
        transition: all 0.3s ease;
    }
    
    .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon {
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M8 8L22 22M8 22L22 8'/%3e%3c/svg%3e") !important;
    }
    
    .navbar-toggler:focus {
        border: none !important;
        box-shadow: none !important;
    }
    
    /* 2. 菜单文字左边距与logo一致，移除nav-item水平内边距 */
    .navbar-collapse {
        padding-top: 0;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(0, 0, 0, 1);
        backdrop-filter: blur(10px);
        z-index: 1000;
    }
    
    .navbar-collapse .navbar-nav {
        margin-left: 0 !important;
        margin-right: 0 !important;
        margin-top: 10px;
        margin-bottom: 10px;
        padding-left: 0;
        padding-right: 0;
        width: 100%;
    }
    
    .navbar-collapse {
        padding-left: 15px;
        padding-right: 15px;
    }
    
    .navbar-nav .nav-item {
        padding: 0 !important;
        margin: 0 !important;
        display: flex;
        align-items: center;
    }
    
    .navbar-nav .nav-link {
        padding: 16px 0 !important;
        font-size: 0.95rem;
        min-height: 48px;
        display: flex;
        align-items: center;
        width: 100%;
        flex: 1;
    }
    
    /* 3. nav-item之间添加分隔线 */
    .navbar-nav .nav-item:not(:first-child) {
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
}

/* 桌面端登录按钮特殊样式 */
@media (min-width: 992px) {
    #login-btn {
        background: rgba(255, 255, 255, 0.1);
        padding: 0.4rem 0.8rem !important;
        color: var(--white) !important;
        font-size: 0.9rem;
    }
    
    .navbar-nav .nav-item {
        line-height: 1.2;
        margin: 0 0.2rem;
    }

    .login-nav-item{
        margin-left: 1.5rem !important;
        margin-right: 0 !important;
    }
    
}