/* =============================================
       全局 Reset & 变量
    ============================================= */
    :root {
        --mkl-nav-h: 60px;
        --mkl-nav-bg: rgba(255,255,255,0.72);
        --mkl-nav-blur: saturate(180%) blur(20px);
        --mkl-nav-border: rgba(0,0,0,0.08);
        --mkl-text: rgba(0,0,0,0.85);
        --mkl-text-secondary: #6E6E73;
        --mkl-accent: #0071e3;
        --mkl-font: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
    }

    /* =============================================
       导航栏主体
    ============================================= */
#mkl-navbar {
        position: sticky;
        top: 0;
        z-index: 1000;
        width: 100%;
        /* 毛玻璃背景放在通栏层，超宽屏无缺口 */
        background: var(--mkl-nav-bg);
        backdrop-filter: var(--mkl-nav-blur);
        -webkit-backdrop-filter: var(--mkl-nav-blur);
        border-bottom: 1px solid var(--mkl-nav-border);
    }
    /* 管理员工具栏补偿 */
    .admin-bar #mkl-navbar {
        top: 32px;
    }
    @media screen and (max-width: 782px) {
        .admin-bar #mkl-navbar {
            top: 46px;
        }
    }
    .mkl-nav-inner {
        height: var(--mkl-nav-h);
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 48px;
        max-width: 1600px;
        margin: 0 auto;
        /* 背景已移到 #mkl-navbar 通栏层 */
    }
    /* 微信 / 不支持 backdrop-filter 的降级 */
    @supports not (backdrop-filter: blur(1px)) {
        #mkl-navbar { background: rgba(255,255,255,0.95); }
    }

    /* Logo */
    .mkl-nav-logo {
        font-family: var(--mkl-font);
        font-size: 24px;
        font-weight: 800;
        color: var(--mkl-text);
        text-decoration: none;
        letter-spacing: 0.04em;
        flex-shrink: 0;
    }

    /* =============================================
       PC 端导航链接，用于调整菜单间距，70%可以自己改
    ============================================= */
.mkl-nav-links {
        display: flex;
        align-items: center;
        list-style: none;
        margin: 0;
        padding: 0;
        gap: 0;
        flex: 0 1 75%;
        justify-content: space-evenly;
    }

  

    .mkl-nav-item {
        font-family: var(--mkl-font);
        font-size: 15px;
        font-weight: 500;
        color: var(--mkl-text);
        text-decoration: none;
        display: flex;
        align-items: center;
        gap: 4px;
        transition: opacity 0.3s;
        white-space: nowrap;
    }
    .mkl-nav-item:hover { opacity: 0.65; }
    .mkl-nav-item.current { font-weight: 600; }

    /* 工业解决方案特殊样式 */
    .mkl-nav-industrial {
        color: var(--mkl-accent);
        font-weight: 500;
    }

    .mkl-nav-chevron {
        transition: transform 0.25s;
        flex-shrink: 0;
    }

    /* =============================================
       下拉菜单
    ============================================= */
    .mkl-nav-has-dropdown {
        position: relative;
    }

    .mkl-nav-dropdown {
        position: absolute;
        top: calc(100% + 8px);
        left: 50%;
        transform: translateX(-50%);
        background: rgba(255,255,255,0.95);
        backdrop-filter: saturate(180%) blur(20px);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        border: 1px solid var(--mkl-nav-border);
        border-radius: 14px;
        padding: 8px;
        min-width: 220px;
        box-shadow: 0 8px 32px rgba(0,0,0,0.12), 0 2px 8px rgba(0,0,0,0.06);
        opacity: 0;
        visibility: hidden;
        transform: translateX(-50%) translateY(-6px);
        transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
        z-index: 100;
    }

    .mkl-nav-has-dropdown:hover .mkl-nav-dropdown,
    .mkl-nav-has-dropdown:focus-within .mkl-nav-dropdown {
        opacity: 1;
        visibility: visible;
        transform: translateX(-50%) translateY(0);
    }

    .mkl-nav-has-dropdown:hover .mkl-nav-chevron {
        transform: rotate(180deg);
    }

    .mkl-dropdown-item {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 10px 12px;
        border-radius: 8px;
        text-decoration: none;
        transition: background 0.15s;
    }
    .mkl-dropdown-item:hover { background: rgba(0,0,0,0.04); }

    .mkl-dropdown-icon { font-size: 18px; flex-shrink: 0; }

    .mkl-dropdown-text {
        display: flex;
        flex-direction: column;
        gap: 2px;
    }
    .mkl-dropdown-text strong {
        font-family: var(--mkl-font);
        font-size: 14px;
        font-weight: 500;
        color: var(--mkl-text);
    }
    .mkl-dropdown-text small {
        font-family: var(--mkl-font);
        font-size: 12px;
        color: var(--mkl-text-secondary);
    }
    /* 下拉菜单分隔线 — 工具区 | 服务区 */
    .mkl-dropdown-divider {
        height: 1px;
        background: var(--mkl-nav-border, rgba(0,0,0,0.06));
        margin: 6px 16px;
    }
    /* 移动端分隔线 */
    .mkl-mobile-divider {
        height: 1px;
        background: rgba(0,0,0,0.06);
        margin: 4px 12px;
        list-style: none;
    }

    /* =============================================
       右侧操作区
    ============================================= */
   .mkl-nav-actions {
       display: flex;
       align-items: center;
       gap: 8px;
       flex-shrink: 0;
   }
/* 公告胶囊 */
   .mkl-nav-badge {
       display: flex;
       align-items: center;
       position: relative;
   }
   .mkl-nav-badge-inner {
       display: flex;
       align-items: center;
       gap: 6px;
       background: rgba(0, 113, 227, 0.08);
       color: #0071e3;
       font-size: 12px;
       font-weight: 500;
       padding: 5px 12px;
       border-radius: 20px;
       white-space: nowrap;
       cursor: pointer;
       border: 1px solid rgba(0,113,227,0.15);
       transition: background 0.2s;
       font-family: var(--mkl-font);
   }
   .mkl-nav-badge-inner:hover {
       background: rgba(0, 113, 227, 0.14);
   }
   .mkl-nav-badge-dot {
       width: 6px;
       height: 6px;
       border-radius: 50%;
       background: #0071e3;
       flex-shrink: 0;
       animation: mkl-dot-pulse 2s infinite;
   }
   @keyframes mkl-dot-pulse {
       0%, 100% { opacity: 1; }
       50% { opacity: 0.3; }
   }
   .mkl-badge-arrow {
       color: #0071e3;
       transition: transform 0.2s;
       flex-shrink: 0;
   }
   .mkl-nav-badge-inner[aria-expanded="true"] .mkl-badge-arrow {
       transform: rotate(180deg);
   }
   /* 下拉列表 */
   .mkl-badge-dropdown {
       display: none;
       position: absolute;
       top: calc(100% + 8px);
       right: 0;
       background: rgba(255,255,255,0.95);
       backdrop-filter: saturate(180%) blur(20px);
       -webkit-backdrop-filter: saturate(180%) blur(20px);
       border: 1px solid rgba(0,0,0,0.08);
       border-radius: 12px;
       padding: 8px 0;
       min-width: 240px;
       box-shadow: 0 8px 30px rgba(0,0,0,0.12);
       z-index: 999;
   }
   .mkl-badge-dropdown.open {
       display: block;
       animation: mkl-dropdown-in 0.18s ease;
   }
   @keyframes mkl-dropdown-in {
       from { opacity: 0; transform: translateY(-4px); }
       to   { opacity: 1; transform: translateY(0); }
   }
   .mkl-badge-item {
       display: flex;
       align-items: flex-start;
       gap: 10px;
       padding: 10px 16px;
       transition: background 0.15s;
   }
   .mkl-badge-item:hover {
       background: rgba(0,113,227,0.05);
   }
   .mkl-badge-item-dot {
       width: 5px;
       height: 5px;
       border-radius: 50%;
       background: #0071e3;
       flex-shrink: 0;
       margin-top: 5px;
   }
   .mkl-badge-item-text {
       font-size: 13px;
       color: var(--mkl-text);
       line-height: 1.5;
       text-decoration: none;
       white-space: normal;
   }
   a.mkl-badge-item-text:hover {
       color: #0071e3;
   }

    .mkl-nav-search-btn {
        background: none;
        border: none;
        color: var(--mkl-text);
        cursor: pointer;
        padding: 6px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 8px;
        transition: opacity 0.2s, background 0.2s;
    }
    .mkl-nav-search-btn:hover { opacity: 0.65; }

    /* 汉堡菜单：PC 隐藏，移动端显示 */
    .mkl-hamburger {
        display: none;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 6px;
        width: 36px;
        height: 36px;
    }
    .mkl-hamburger-line {
        display: block;
        width: 22px;
        height: 1.5px;
        background: var(--mkl-text);
        border-radius: 2px;
        transition: transform 0.3s, opacity 0.3s;
        transform-origin: center;
    }
    /* 汉堡 → X 动画 */
    .mkl-hamburger.is-open .mkl-hamburger-line:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
    .mkl-hamburger.is-open .mkl-hamburger-line:nth-child(2) { opacity: 0; transform: scaleX(0); }
    .mkl-hamburger.is-open .mkl-hamburger-line:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

    /* =============================================
       搜索展开框
    ============================================= */
    .mkl-search-expand {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(255,255,255,0.95);
        backdrop-filter: saturate(180%) blur(20px);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        border-bottom: 1px solid var(--mkl-nav-border);
        padding: 12px 24px;
        opacity: 0;
        transform: translateY(-4px);
        pointer-events: none;
        transition: opacity 0.2s, transform 0.2s;
        z-index: 999;
    }
    .mkl-search-expand.is-open {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .mkl-search-inner {
        display: flex;
        align-items: center;
        gap: 10px;
        max-width: 600px;
        margin: 0 auto;
        background: rgba(0,0,0,0.04);
        border-radius: 10px;
        padding: 8px 14px;
    }
    .mkl-search-icon-input { color: var(--mkl-text-secondary); flex-shrink: 0; }
    .mkl-search-input {
        flex: 1;
        background: none;
        border: none;
        outline: none;
        font-family: var(--mkl-font);
        font-size: 15px;
        color: var(--mkl-text);
    }
    .mkl-search-input::placeholder { color: var(--mkl-text-secondary); }
    .mkl-search-close {
        background: none;
        border: none;
        color: var(--mkl-text-secondary);
        cursor: pointer;
        padding: 2px;
        display: flex;
        align-items: center;
    }
    .mkl-search-close:hover { color: var(--mkl-text); }

    /* =============================================
       移动端菜单
    ============================================= */
    .mkl-mobile-menu {
        display: none; /* JS 控制 */
        position: fixed;
        top: var(--mkl-nav-h);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(255,255,255,0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        z-index: 998;
        padding: 16px 0;
        overflow-y: auto;
        transform: translateY(-8px);
        opacity: 0;
        transition: opacity 0.25s, transform 0.25s;
    }
    .mkl-mobile-menu.is-open {
        display: block;
        opacity: 1;
        transform: translateY(0);
    }

    .mkl-mobile-nav-list {
        list-style: none;
        margin: 0;
        padding: 0 20px;
    }

    .mkl-mobile-nav-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 16px 4px;
        font-family: var(--mkl-font);
        font-size: 17px;
        font-weight: 500;
        color: var(--mkl-text);
        text-decoration: none;
        border-bottom: 1px solid rgba(0,0,0,0.06);
        width: 100%;
        cursor: pointer;
    }
    .mkl-mobile-nav-item:last-child { border-bottom: none; }

    /* 移动端子菜单手风琴 */
    .mkl-mobile-accordion { border-bottom: 1px solid rgba(0,0,0,0.06); }
    .mkl-mobile-accordion summary { list-style: none; }
    .mkl-mobile-accordion summary::-webkit-details-marker { display: none; }
    .mkl-mobile-accordion summary.mkl-mobile-nav-item::after {
        content: '›';
        font-size: 20px;
        color: var(--mkl-text-secondary);
        transition: transform 0.2s;
        display: inline-block;
    }
    .mkl-mobile-accordion[open] summary.mkl-mobile-nav-item::after {
        transform: rotate(90deg);
    }

    .mkl-mobile-sub-list {
        list-style: none;
        padding: 4px 0 12px 12px;
        margin: 0;
    }
    .mkl-mobile-sub-list li a {
        display: block;
        padding: 12px 4px;
        font-family: var(--mkl-font);
        font-size: 15px;
        color: var(--mkl-text);
        text-decoration: none;
        border-bottom: 1px solid rgba(0,0,0,0.04);
    }
    .mkl-mobile-sub-list li:last-child a { border-bottom: none; }