/* ============================================================
   头部导航下拉统一改版（参考大型能源企业官网风格）
   1) 产品中心：全宽 Mega 面板（左列分类 + 右侧详情，JS 控制切换）
   2) 其他下拉（联系我们等）：统一白底大样式
   3) 空下拉（首页/关于我们）由 JS 隐藏
   ============================================================ */

@media (min-width: 768px) {

    /* ---------- 通用：所有一级下拉白底大气化（含"联系我们"） ---------- */
    .navigation-n101m-94 .mnavb-2 {
        background: #fff !important;
        background-image: none !important;
        border-bottom: 3px solid #ea7a1c;
        border-radius: 0 0 6px 6px;
        box-shadow: 0 18px 42px rgba(0, 0, 0, 0.16);
        padding: 10px 0 !important;
        min-width: 260px;
        transform-origin: 0 0;
    }
    .navigation-n101m-94 .nb-2li {
        color: #3a3a3a !important;
        background: transparent !important;
        margin: 0 !important;
        padding: 12px 26px !important;
        font-size: 1.5rem !important;
        line-height: 1.5;
        white-space: nowrap;
        border-radius: 0 !important;
        transition: all .2s;
    }
    .navigation-n101m-94 .nb-2li:hover {
        color: #bf5a08 !important;
        background: #fef3e8 !important;
    }
    .navigation-n101m-94 .nb-2li.active { color: #ea7a1c !important; }
    .navigation-n101m-94 .nb-2a { max-width: none !important; }
    .navigation-n101m-94 .ta-2aro { display: none !important; }
    /* 三级子菜单同步白底（目前均为空，由 JS 隐藏，这里保底样式） */
    .navigation-n101m-94 .mnavb-3 {
        background: #fff !important;
        border-bottom: 2px solid #ea7a1c;
        box-shadow: 0 14px 32px rgba(0, 0, 0, 0.14);
        border-radius: 0 0 6px 6px;
    }
    .navigation-n101m-94 .nb-3li {
        color: #3a3a3a !important;
        background: transparent !important;
    }
    .navigation-n101m-94 .nb-3li:hover { color: #bf5a08 !important; background: #fef3e8 !important; }

    /* ---------- Mega 面板（产品中心 + 联系我们） ---------- */
    /* 桌面端隐藏两块原有小下拉（移动端汉堡仍使用） */
    .navigation-n101m-94 .nb-mega > .mnavb-2,
    .navigation-n101m-94 .nb-mega2 > .mnavb-2 { display: none !important; }

    .navigation-n101m-94 .mega-panel {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #fff;
        box-shadow: 0 24px 48px rgba(0, 0, 0, 0.18);
        border-top: 3px solid #ea7a1c;
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        transition: opacity .25s ease, transform .25s ease, visibility .25s;
        pointer-events: none;
        z-index: 1050;
    }
    .navigation-n101m-94 .mega-panel.open {
        opacity: 1;
        visibility: visible;
        transform: none;
        pointer-events: auto;
    }

    .navigation-n101m-94 .mega-wrap {
        display: flex;
        align-items: stretch;
        max-width: 1250px;
        margin: 0 auto;
        padding: 26px 32px;
        min-height: 470px;
        position: relative;   /* 作为右侧详情 .mega-sub 的定位基准（随容器居中，任何屏宽都与左列对齐） */
    }

    /* ---- 左列分类 ---- */
    .navigation-n101m-94 .mega-left {
        list-style: none;
        margin: 0;
        padding: 0;
        flex: 0 0 280px;
        border-right: 1px solid #efefef;
    }
    .navigation-n101m-94 .mega-la {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 18px;
        margin: 2px 0;
        color: #3a3a3a;
        font-size: 1.6rem;
        line-height: 1.45;
        white-space: nowrap;
        border-radius: 6px;
        transition: all .2s;
    }
    .navigation-n101m-94 .mm-ico {
        flex: 0 0 22px;
        width: 22px;
        height: 22px;
        color: #9a9a9a;
        fill: none;
        stroke: currentColor;
        stroke-width: 1.7;
        stroke-linecap: round;
        stroke-linejoin: round;
        transition: color .2s;
    }
    /* 默认选中项：浅橙（主色）；鼠标悬停时才用深橙 */
    .navigation-n101m-94 .mega-li.cur > .mega-la {
        background: #fef3e8;
        color: #ea7a1c;
    }
    .navigation-n101m-94 .mega-panel .mega-la:hover {
        background: #fef3e8;
        color: #bf5a08;
    }
    .navigation-n101m-94 .mega-li.cur .mm-ico { color: #ea7a1c; }
    .navigation-n101m-94 .mega-panel .mega-la:hover .mm-ico { color: #bf5a08; }

    /* ---- 右侧详情区（由 JS 的 .cur 控制） ---- */
    .navigation-n101m-94 .mega-li { position: static; }
    .navigation-n101m-94 .mega-sub {
        display: none;
        position: absolute;
        top: 26px;
        bottom: 26px;
        left: 342px;   /* 32 wrap-padding + 280 left + 30 gap */
        right: 32px;
        align-items: flex-start;
        padding-top: 16px;
    }
    .navigation-n101m-94 .mega-li.cur .mega-sub { display: flex; }

    .navigation-n101m-94 .mm-info { flex: 1; min-width: 0; }
    .navigation-n101m-94 .mm-title {
        margin: 0 0 10px;
        font-size: 2.4rem;
        font-weight: 600;
        color: #222;
        display: flex;
        align-items: baseline;
        gap: 10px;
    }
    .navigation-n101m-94 .mm-title a { color: inherit; transition: color .2s; }
    .navigation-n101m-94 .mm-title a:hover { color: #bf5a08; }
    .navigation-n101m-94 .mm-arr { color: #ea7a1c; font-size: 2.5rem; line-height: 1; }
    .navigation-n101m-94 .mm-desc {
        margin: 0 0 26px;
        font-size: 1.5rem;
        line-height: 1.8;
        color: #858585;
        max-width: 600px;
    }
    .navigation-n101m-94 .mm-links {
        display: grid;
        grid-template-columns: repeat(2, minmax(200px, 270px));
        gap: 12px 48px;
    }
    .navigation-n101m-94 .mm-links a {
        color: #444;
        font-size: 1.5rem;
        padding: 6px 0;
        transition: color .2s;
    }
    .navigation-n101m-94 .mm-links a::before {
        content: '';
        display: inline-block;
        width: 5px;
        height: 5px;
        border-radius: 50%;
        background: #ea7a1c;
        margin-right: 10px;
        vertical-align: 2px;
    }
    .navigation-n101m-94 .mm-links a:hover { color: #bf5a08; }

    .navigation-n101m-94 .mm-pic { flex: 0 0 320px; margin-left: 40px; }
    .navigation-n101m-94 .mm-pic a {
        display: block;
        border-radius: 8px;
        overflow: hidden;
        box-shadow: 0 10px 26px rgba(0, 0, 0, 0.12);
    }
    .navigation-n101m-94 .mm-pic img {
        display: block;
        width: 100%;
        height: 212px;
        object-fit: cover;
        transition: transform .4s;
    }
    .navigation-n101m-94 .mm-pic a:hover img { transform: scale(1.05); }

    .navigation-n101m-94 .nb-mega.showncl > .nb-1a,
    .navigation-n101m-94 .nb-mega2.showncl > .nb-1a { color: #bf5a08; }

    /* 联系我们：全宽白色横条，文字链接横向一行排开（SUNGROW 风格） */
    .navigation-n101m-94 #megaPanel2 .mega-hlist {
        list-style: none;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-wrap: wrap;
        gap: 6px 58px;
        max-width: 1250px;
        margin: 0 auto;
        padding: 36px 32px;
    }
    .navigation-n101m-94 #megaPanel2 .mega-hlist a {
        color: #3a3a3a;
        font-size: 1.6rem;
        white-space: nowrap;
        padding: 8px 2px;
        transition: color .2s;
    }
    .navigation-n101m-94 #megaPanel2 .mega-hlist a:hover { color: #bf5a08; }
}

/* ---- 移动端：Mega 面板整体隐藏，汉堡菜单不变 ---- */
@media (max-width: 767.98px) {
    .navigation-n101m-94 .mega-panel { display: none !important; }
}