/**
 * common-navbar.css
 * 顶部导航 Web Component 样式
 *
 * 状态：
 *   - 默认（无 transparent 属性）：白底、黑字、蓝 logo
 *   - transparent + 未滚动/未悬停：透明底、白字、白 logo
 *   - transparent + 滚动/悬停：白底、黑字、蓝 logo
 */

.lenet-navbar-host {
    display: block;
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    height: 80px;
    background: #ffffff;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    transition: background 0.3s, box-shadow 0.3s, border-color 0.3s;
}

/* ===== 内部布局 ===== */
.lenet-navbar {
    max-width: 1440px;
    height: 80px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    padding: 0 40px;
    gap: 60px;
}

/* ===== Logo（默认只显示蓝色） ===== */
.lenet-navbar .brand {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}
.lenet-navbar .brand .logo {
    height: 48px;
    display: block;
}
.lenet-navbar .brand .logo-white { display: none; }
.lenet-navbar .brand .logo-blue  { display: block; }

/* ===== 菜单 ===== */
.lenet-navbar .nav-main {
    flex: 1;
    display: flex;
    justify-content: center;
}
.lenet-navbar .nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 0;
}

.lenet-navbar .nav-item {
    position: relative;
    height: 80px;
}

.lenet-navbar .nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 80px;
    padding: 0 18px;
    font-size: 16px;
    color: #252525;
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color 0.2s;
}

.lenet-navbar .nav-link .caret {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid currentColor;
    opacity: 0.55;
    transition: transform 0.2s;
}

.lenet-navbar .nav-item.active > .nav-link,
.lenet-navbar .nav-item:hover > .nav-link,
.lenet-navbar .nav-item.open > .nav-link {
    color: #1677ff;
}

.lenet-navbar .nav-item.active > .nav-link::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 0;
    height: 2px;
    background: #1677ff;
}

.lenet-navbar .nav-item.open .caret {
    transform: rotate(180deg);
}

/* ===== 下拉面板 ===== */
.lenet-navbar .dropdown {
    position: absolute;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    min-width: 200px;
    background: #ffffff;
    border-top: 2px solid #1677ff;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    padding: 24px 32px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}

.lenet-navbar .nav-item.has-dropdown .dropdown {
    left: 50%;
    transform: translateX(-50%);
    min-width: 1280px;
}

.lenet-navbar .nav-item.open .dropdown {
    opacity: 1;
    visibility: visible;
}

.lenet-navbar .dropdown-inner {
    display: flex;
    gap: 32px;
    justify-content: space-between;
}

.lenet-navbar .dd-col { min-width: 150px; flex: 1; }
.lenet-navbar .dd-col-simple { min-width: 100px; flex: 1; text-align: center; }
.lenet-navbar .dd-col-simple .dd-item { white-space: normal; text-align: center; }
.lenet-navbar .dd-col-multi { min-width: 480px; flex: 0 0 480px; }

.lenet-navbar .dd-subcols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0 16px;
}
.lenet-navbar .dd-subcol { min-width: 0; }

.lenet-navbar .dd-title {
    font-size: 15px;
    font-weight: 600;
    color: #252525;
    border-bottom: 1px solid #e8e8e8;
    padding-bottom: 8px;
    margin-bottom: 12px;
    white-space: nowrap;
}

.lenet-navbar .dd-items {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lenet-navbar .dd-item {
    display: block;
    font-size: 14px;
    color: #555;
    text-decoration: none;
    padding: 4px 0;
    white-space: nowrap;
    transition: color 0.2s;
}

.lenet-navbar .dd-item:hover {
    color: #1677ff;
}

/* ============================================
   Transparent 模式（仅首页）
   ============================================ */

/* 透明态：背景透明、白字、白 logo */
.lenet-navbar-host[transparent] {
    position: fixed;
    background: transparent;
    border-bottom: none;
}
.lenet-navbar-host[transparent] .lenet-navbar .nav-link { color: #ffffff; }
.lenet-navbar-host[transparent] .lenet-navbar .nav-item.active > .nav-link,
.lenet-navbar-host[transparent] .lenet-navbar .nav-item.open > .nav-link,
.lenet-navbar-host[transparent] .lenet-navbar .nav-item:hover > .nav-link {
    color: #91FCFD;
}
.lenet-navbar-host[transparent] .brand .logo-white { display: block; }
.lenet-navbar-host[transparent] .brand .logo-blue  { display: none; }

/* 滚动/悬停后：变白底、黑字、蓝 logo */
.lenet-navbar-host[transparent].is-scrolled,
.lenet-navbar-host[transparent].is-hover {
    background: #ffffff;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}
.lenet-navbar-host[transparent].is-scrolled .lenet-navbar .nav-link,
.lenet-navbar-host[transparent].is-hover   .lenet-navbar .nav-link { color: #252525; }
.lenet-navbar-host[transparent].is-scrolled .lenet-navbar .nav-item.active > .nav-link,
.lenet-navbar-host[transparent].is-hover   .lenet-navbar .nav-item.active > .nav-link,
.lenet-navbar-host[transparent].is-scrolled .lenet-navbar .nav-item.open > .nav-link,
.lenet-navbar-host[transparent].is-hover   .lenet-navbar .nav-item.open > .nav-link,
.lenet-navbar-host[transparent].is-scrolled .lenet-navbar .nav-item:hover > .nav-link,
.lenet-navbar-host[transparent].is-hover   .lenet-navbar .nav-item:hover > .nav-link { color: #1677ff; }
.lenet-navbar-host[transparent].is-scrolled .brand .logo-white,
.lenet-navbar-host[transparent].is-hover   .brand .logo-white { display: none; }
.lenet-navbar-host[transparent].is-scrolled .brand .logo-blue,
.lenet-navbar-host[transparent].is-hover   .brand .logo-blue  { display: block; }

/* ===== 响应式 ===== */
@media (max-width: 1240px) {
    .lenet-navbar {
        padding: 0 20px;
        gap: 16px;
    }
    .lenet-navbar .nav-link {
        padding: 0 12px;
        font-size: 14px;
    }
}

/* 汉堡按钮：桌面端默认隐藏 */
.lenet-navbar .nav-toggle {
    display: none;
}

@media (max-width: 767px) {
    /* 汉堡按钮 */
    .lenet-navbar .nav-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 44px;
        height: 44px;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        margin-left: auto;
        padding: 0;
        z-index: 1001;
    }
    .lenet-navbar .nav-toggle span {
        display: block;
        width: 24px;
        height: 2px;
        background: #252525;
        border-radius: 2px;
        transition: all 0.3s;
    }
    .lenet-navbar-host[transparent] .lenet-navbar .nav-toggle span {
        background: #ffffff;
    }
    .lenet-navbar-host[transparent].is-scrolled .lenet-navbar .nav-toggle span,
    .lenet-navbar-host[transparent].is-hover .lenet-navbar .nav-toggle span {
        background: #252525;
    }
    .lenet-navbar .nav-toggle.is-active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .lenet-navbar .nav-toggle.is-active span:nth-child(2) {
        opacity: 0;
    }
    .lenet-navbar .nav-toggle.is-active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    /* 菜单容器：默认隐藏，展开后全屏覆盖 */
    .lenet-navbar .nav-main {
        display: none;
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        bottom: 0;
        background: #ffffff;
        box-shadow: 0 8px 24px rgba(0,0,0,0.08);
        border-top: 1px solid #f0f0f0;
        padding: 8px 0;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        z-index: 999;
    }
    .lenet-navbar .nav-main.is-open {
        display: block;
    }
    .lenet-navbar .nav-list {
        flex-direction: column;
        gap: 0;
    }
    .lenet-navbar .nav-item {
        height: auto;
        border-bottom: 1px solid #f5f5f5;
    }
    .lenet-navbar .nav-item:last-child {
        border-bottom: none;
    }
    .lenet-navbar .nav-link {
        height: 48px;
        padding: 0 20px;
        font-size: 15px;
        justify-content: space-between;
    }
    .lenet-navbar .nav-item.active > .nav-link::after {
        left: 20px;
        right: 20px;
        bottom: 4px;
    }

    /* 下拉面板：移动端改为静态块级，默认展开第一层 */
    .lenet-navbar .dropdown {
        position: static !important;
        transform: none !important;
        opacity: 1 !important;
        visibility: visible !important;
        display: block !important;
        min-width: 0 !important;
        width: 100% !important;
        left: auto !important;
        right: auto !important;
        box-shadow: none !important;
        border-top: none !important;
        border-bottom: 1px solid #f0f0f0;
        background: #f8f9fa;
        padding: 8px 0;
        max-height: none;
        overflow: visible;
    }
    .lenet-navbar .dropdown-inner {
        flex-direction: column;
        gap: 0;
        width: 100%;
    }
    .lenet-navbar .dd-col,
    .lenet-navbar .dd-col-simple,
    .lenet-navbar .dd-col-multi {
        min-width: 0 !important;
        flex: none;
        width: 100%;
        padding: 0 20px;
        margin: 0;
    }
    .lenet-navbar .dd-subcols {
        grid-template-columns: repeat(2, 1fr);
        gap: 4px;
    }
    .lenet-navbar .dd-subcol {
        min-width: 0;
    }
    .lenet-navbar .dd-title {
        font-size: 14px;
        margin: 0 0 8px 0;
        padding: 10px 0;
        border-bottom: 1px solid #e8e8e8;
        color: #1677ff;
        font-weight: 600;
    }
    .lenet-navbar .dd-items {
        display: flex;
        flex-direction: column;
        gap: 2px;
    }
    .lenet-navbar .dd-item {
        padding: 8px 10px;
        font-size: 13px;
        white-space: normal;
        border-radius: 4px;
        transition: background 0.2s;
        display: block;
        min-height: 40px;
        line-height: 1.4;
    }
    .lenet-navbar .dd-item:hover {
        background: rgba(22, 119, 255, 0.08);
    }

    /* 透明模式移动端背景 */
    .lenet-navbar-host[transparent] .lenet-navbar .nav-main {
        background: #0a1929;
        border-top-color: rgba(255,255,255,0.1);
    }
    .lenet-navbar-host[transparent] .lenet-navbar .nav-item {
        border-bottom-color: rgba(255,255,255,0.06);
    }
    .lenet-navbar-host[transparent] .lenet-navbar .nav-link {
        color: #ffffff;
    }
    .lenet-navbar-host[transparent] .lenet-navbar .dropdown {
        background: #141d2b;
        border-bottom-color: rgba(255,255,255,0.06);
    }
    .lenet-navbar-host[transparent] .lenet-navbar .dd-title {
        color: #ffffff;
        border-bottom-color: rgba(255,255,255,0.1);
    }
    .lenet-navbar-host[transparent] .lenet-navbar .dd-item {
        color: #b8c5d3;
    }
    .lenet-navbar-host[transparent] .lenet-navbar .dd-item:hover {
        background: rgba(255,255,255,0.1);
    }
    .lenet-navbar-host[transparent].is-scrolled .lenet-navbar .nav-main,
    .lenet-navbar-host[transparent].is-hover .lenet-navbar .nav-main {
        background: #ffffff;
        border-top-color: #f0f0f0;
    }
    .lenet-navbar-host[transparent].is-scrolled .lenet-navbar .nav-item,
    .lenet-navbar-host[transparent].is-hover .lenet-navbar .nav-item {
        border-bottom-color: #f5f5f5;
    }
    .lenet-navbar-host[transparent].is-scrolled .lenet-navbar .nav-link,
    .lenet-navbar-host[transparent].is-hover .lenet-navbar .nav-link {
        color: #252525;
    }
    .lenet-navbar-host[transparent].is-scrolled .lenet-navbar .dropdown,
    .lenet-navbar-host[transparent].is-hover .lenet-navbar .dropdown {
        background: #f8f9fa;
        border-bottom-color: #f0f0f0;
    }
    .lenet-navbar-host[transparent].is-scrolled .lenet-navbar .dd-title,
    .lenet-navbar-host[transparent].is-hover .lenet-navbar .dd-title {
        color: #252525;
        border-bottom-color: #e8e8e8;
    }
    .lenet-navbar-host[transparent].is-scrolled .lenet-navbar .dd-item,
    .lenet-navbar-host[transparent].is-hover .lenet-navbar .dd-item {
        color: #555;
    }
}