/* CSS变量定义 - 紫色配色方案 */
:root {
    --primary-color: #7c3aed;
    --primary-dark: #5b21b6;
    --primary-darker: #4c1d95;
    --primary-light: #a855f7;
    --primary-light-08: rgba(124,58,237,0.08);
    --primary-light-10: rgba(124,58,237,0.1);
    --primary-light-15: rgba(124,58,237,0.15);
    --primary-light-20: rgba(124,58,237,0.2);
    --primary-light-05: rgba(124,58,237,0.05);
    --primary-shadow: rgba(124, 58, 237, 0.3);
    --primary-shadow-40: rgba(124, 58, 237, 0.4);
    --primary-gradient: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
    --white-98: rgba(255,255,255,0.98);
    --white-90: rgba(255,255,255,0.9);
    --white-50: rgba(255,255,255,0.5);
    --white-18: rgba(255,255,255,0.18);
    --black-75: rgba(38,38,38,0.85);
    --black-15: rgba(0,0,0,0.15);
    --black-08: rgba(0,0,0,0.08);
    --black-05: rgba(0,0,0,0.05);
    --black-03: rgba(0,0,0,0.03);
    --text-muted: #8c8c8c;
    --text-secondary: #595959;
    --border-light: #d9d9d9;
}

/* 页面加载动画样式 */
.page-loader {
    position: fixed;
    width: 100%;
    height: 100%;
    background: #ffffff;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease;
}
.loader-content {
    text-align: center;
}
.spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto;
    border: 4px solid rgba(124, 58, 237, 0.1);
    border-radius: 50%;
    border-top: 4px solid #7c3aed;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 导航栏整体样式 - 大气升级版 */
.main-navbar {
    background: linear-gradient(135deg, #ffffff 0%, #faf5ff 100%);
    box-shadow: 0 8px 32px rgba(124, 58, 237, 0.08), 0 2px 16px rgba(0, 0, 0, 0.04);
    padding: 0.8rem 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(124, 58, 237, 0.1);
}

.main-navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0.8;
}

/* Logo 样式 - 增强版 */
.navbar-brand {
    position: relative;
    margin-right: 2rem;
}

.navbar-brand img {
    filter: drop-shadow(0 4px 12px rgba(124, 58, 237, 0.15));
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
}

.navbar-brand:hover img {
    transform: scale(1.08) translateY(-2px);
    filter: drop-shadow(0 8px 20px rgba(124, 58, 237, 0.25));
}

.navbar-brand::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: 2px;
    transition: width 0.4s ease;
}

.navbar-brand:hover::after {
    width: 100%;
}

/* 导航菜单项 - 大气升级版 */
.main-navbar .navbar-nav .nav-link {
    color: var(--black-75);
    font-weight: 600;
    font-size: 1.05rem;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    margin: 0 0.3rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.02em;
}

.main-navbar .navbar-nav .nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: all 0.4s ease;
    border-radius: 12px;
    z-index: -1;
    transform: scale(0.8);
}

.main-navbar .navbar-nav .nav-link:hover {
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 12px 28px var(--primary-shadow);
}

.main-navbar .navbar-nav .nav-link:hover::before {
    opacity: 1;
    transform: scale(1);
}

.main-navbar .navbar-nav .nav-link.active {
    color: white;
    background: var(--primary-gradient);
    box-shadow: 0 8px 20px var(--primary-shadow);
    transform: translateY(-2px);
}

.main-navbar .navbar-nav .nav-link.active::before {
    opacity: 0;
}

/* 下拉菜单样式 - 紫色升级版 */
.dropdown-menu {
    border: none;
    box-shadow: 0 20px 60px rgba(124, 58, 237, 0.15), 0 8px 30px rgba(0, 0, 0, 0.08);
    border-radius: 20px;
    padding: 1.5rem 0;
    margin-top: 15px;
    min-width: 450px;
    animation: dropdown-fade 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--white-98);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid rgba(124, 58, 237, 0.1);
    overflow: hidden;
    position: absolute;
    z-index: 1000;
    /* 中心对齐 */
    left: 50% !important;
    transform: translateX(-50%);
    right: auto !important;
}

@keyframes dropdown-fade {
    from { opacity: 0; transform: translateX(-50%) translateY(-15px) scale(0.98); }
    to { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
}

.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 12px solid transparent;
    border-right: 12px solid transparent;
    border-bottom: 12px solid var(--white-98);
    filter: drop-shadow(0 -4px 8px rgba(124, 58, 237, 0.08));
}

.dropdown-item {
    padding: 0.9rem 1.6rem;
    font-weight: 500;
    transition: all 0.25s ease;
    position: relative;
    z-index: 1;
    overflow: hidden;
    clear: both;
    white-space: nowrap;
    border: none;
}

.dropdown-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    opacity: 0;
    transition: all 0.25s ease;
    z-index: -1;
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: var(--primary-light-08);
    transform: translateX(5px);
    color: var(--primary-color);
}

.dropdown-item:hover::before {
    opacity: 1;
}

.dropdown-item.active {
    background-color: var(--primary-light-15);
    color: var(--primary-color);
}

.dropdown-item.active::before {
    opacity: 1;
    width: 100%;
    background: var(--primary-light-10);
}

.dropdown-item i {
    width: 24px;
    text-align: center;
    margin-right: 12px;
    color: var(--primary-color);
    transition: all 0.25s ease;
    transform: scale(1);
}

.dropdown-item:hover i {
    transform: scale(1.2);
}

/* 下拉菜单分组 */
.dropdown-menu .dropdown-header {
    color: var(--text-secondary);
    font-weight: 600;
    padding: 1rem 1.6rem;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    border-bottom: 1px solid var(--black-05);
    background: linear-gradient(to right, var(--primary-light-05), transparent);
}

/* 下拉菜单分割线 */
.dropdown-menu .dropdown-divider {
    margin: 0.7rem 0;
    border-top: 1px solid var(--black-05);
}

/* 移动端菜单按钮 */
.navbar-toggler {
    border: none;
    background-color: var(--primary-light-10);
    color: var(--primary-color);
    padding: 0.6rem;
    border-radius: 8px;
}

.navbar-toggler:focus {
    box-shadow: none;
}

.navbar-toggler-icon {
    filter: none;
}

/* 下拉菜单网格布局 - 增强版 */
.dropdown-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8rem;
    padding: 1.2rem;
}

/* 4列网格布局 */
.dropdown-grid-4 {
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    padding: 1.5rem;
}

/* 更宽的下拉菜单 */
.dropdown-menu-wide {
    min-width: 800px;
    max-width: 900px;
}

.dropdown-grid-item {
    padding: 1.2rem 1rem;
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.21, 1.02, 0.73, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background-color: var(--white-50);
    border: 1px solid var(--black-03);
    position: relative;
    overflow: hidden;
}

.dropdown-grid-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(13,110,253,0.1), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.dropdown-grid-item:hover {
    background-color: rgba(255,255,255,0.9);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(124,58,237,0.1);
    border-color: rgba(124,58,237,0.1);
}

.dropdown-grid-item:hover::before {
    opacity: 1;
}

.dropdown-grid-item i {
    font-size: 2rem;
    margin-bottom: 0.8rem;
    color: var(--primary-color);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.dropdown-grid-item:hover i {
    transform: scale(1.15) translateY(-5px);
    color: var(--primary-dark);
}

.dropdown-grid-item .title {
    font-weight: 600;
    margin-bottom: 0.4rem;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.dropdown-grid-item:hover .title {
    color: var(--primary-color);
}

.dropdown-grid-item .desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.dropdown-grid-item:hover .desc {
    color: var(--text-secondary);
}

.dropdown-grid-item.active {
    background-color: var(--primary-light-10);
    box-shadow: 0 5px 15px var(--primary-light-15);
    border-color: var(--primary-light-20);
}

.dropdown-grid-item.active i,
.dropdown-grid-item.active .title {
    color: var(--primary-dark);
}

/* 响应式调整 */
@media (max-width: 1200px) and (min-width: 993px) {
    .dropdown-grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }

    .dropdown-menu-wide {
        min-width: 700px;
        max-width: 750px;
    }
}

@media (max-width: 992px) and (min-width: 769px) {
    .dropdown-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .dropdown-menu-wide {
        min-width: 500px;
        max-width: 600px;
    }
}

@media (max-width: 992px) {
    .dropdown-menu {
        border-radius: 0;
        box-shadow: none;
        margin-top: 0;
        padding: 0.5rem 0;
        animation: none;
        background: #ffffff;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        border: none;
        /* 移动端取消中心对齐 */
        left: auto !important;
        transform: none !important;
        right: auto !important;
    }
    
    .dropdown-menu::before {
        display: none;
    }
    
    .main-navbar .navbar-nav .nav-link {
        padding: 0.6rem 1rem;
        margin: 0.2rem 0;
    }
    

    
    .dropdown-item:hover {
        transform: translateX(0);
    }
    
    .dropdown-grid-item {
        border-radius: 8px;
    }
    
    .dropdown-grid-item:hover {
        transform: none;
        box-shadow: none;
    }
}

.country-item.disabled:hover {
    transform: none !important;
    background-color: #ffffff !important;
    border-color: #e9ecef !important;
    box-shadow: none !important;
}

/* 控制台按钮样式 */
.btn-warning {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    color: white;
    font-weight: 500;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    box-shadow: 0 4px 12px var(--primary-shadow);
    transition: all 0.3s ease;
}

.btn-warning:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-darker));
    transform: translateY(-2px);
    box-shadow: 0 6px 15px var(--primary-shadow-40);
    color: white;
}

.btn-warning:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px var(--primary-shadow-40);
}

.btn-warning.active {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-darker));
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2), 0 2px 8px var(--primary-shadow);
    transform: translateY(1px);
}

/* 导航菜单样式 - 与Bootstrap兼容 */
.navbar-nav .nav-item.dropdown {
    position: relative;
}

/* 为桌面版添加悬停效果 */
@media (min-width: 992px) {
    /* 确保桌面端中心对齐 */
    .dropdown-menu {
        left: 50% !important;
        transform: translateX(-50%) !important;
        right: auto !important;
    }

    /* 优化下拉菜单悬停效果，防止过快缩回 */
    .navbar-nav .dropdown-menu {
        opacity: 0;
        visibility: hidden;
        display: block;
        transition: visibility 0s linear 0.2s, opacity 0.2s ease-out, transform 0.2s ease-out;
        pointer-events: none;
        transform: translateX(-50%) translateY(-10px);
    }

    /* 当鼠标悬停在nav-item上时显示下拉菜单 */
    .navbar-nav .nav-item.dropdown:hover > .dropdown-menu {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateX(-50%) translateY(0);
        transition: visibility 0s linear 0s, opacity 0.15s ease-out, transform 0.15s ease-out;
    }
    
    /* 添加悬停区域连接，防止鼠标移动时菜单消失 */
    .navbar-nav .nav-item.dropdown {
        position: relative;
    }
    
    /* 在导航项和下拉菜单之间添加不可见的连接区域 */
    .navbar-nav .nav-item.dropdown::after {
        content: "";
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        height: 12px;
        background: transparent;
        z-index: 999;
    }
    
    /* 扩展下拉菜单的悬停区域 */
    .navbar-nav .dropdown-menu::before {
        content: "";
        position: absolute;
        top: -12px;
        left: 0;
        width: 100%;
        height: 12px;
        background: transparent;
        z-index: 1000;
    }
    
    /* 当鼠标在下拉菜单上时保持显示 */
    .navbar-nav .dropdown-menu:hover {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateX(-50%) translateY(0);
    }
    
    /* 移除原有的延迟隐藏效果，改用更精确的控制 */
    .navbar-nav .nav-item.dropdown:not(:hover) > .dropdown-menu:not(:hover) {
        transition: visibility 0s linear 0.3s, opacity 0.3s ease-out, transform 0.3s ease-out;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateX(-50%) translateY(-10px);
    }
    
    /* 首页特定增强 - 确保在首页上下拉菜单正常工作 */
    body:has(.hero-section) .navbar-nav .nav-item.dropdown:hover > .dropdown-menu {
        display: block;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        z-index: 9999;
    }
}

/* 首页导航特殊处理 */
body:has(.hero-section) .dropdown-menu {
    transform: translateX(-50%);
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

/* 下拉菜单中的按钮样式 */
.dropdown-menu .btn {
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.dropdown-menu .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(124,58,237,0.2);
}

/* 下拉菜单底部按钮区域样式 */
.dropdown-menu .text-center {
    padding: 1rem 1.5rem 0.5rem;
    margin-top: 0.5rem;
}

/* 小屏幕设备样式 */
@media (max-width: 768px) {
    .dropdown-grid,
    .dropdown-grid-4 {
        grid-template-columns: 1fr;
    }

    .dropdown-menu-wide {
        min-width: auto;
        max-width: none;
    }
}