.glass-nav {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

/* body 为 rtl（阿拉伯语等）时，顶栏仍按从左到右排版（HTML dir=ltr 已设，此处双保险） */
nav.glass-nav {
    direction: ltr;
    unicode-bidi: isolate;
}

#lang-modal {
    direction: ltr;
    unicode-bidi: isolate;
}

.glass-nav--dark {
    background: rgba(0, 0, 0, 0.8);
}

@media (max-width: 767px) {
    .glass-nav {
        width: 100%;
        max-width: 100%;
        left: 0;
        right: 0;
    }
}

/* 抽屉导航滚动与安全区（xl 以下显示汉堡菜单） */
@media (max-width: 1279px) {
    #mobile-nav-panel nav.flex-1 {
        -webkit-overflow-scrolling: touch;
        padding-bottom: max(1rem, env(safe-area-inset-bottom));
    }

    #mobile-nav-panel .border-b {
        padding-left: max(1rem, env(safe-area-inset-left));
        padding-right: max(1rem, env(safe-area-inset-right));
    }
}

/* 桌面顶栏：一级链；选中用居中短下划线，避免整行 border-b-2 贴字过近 */
.lihong-nav__links a[data-nav-tier="1"] {
    text-decoration: none;
    list-style: none;
    border-bottom: none !important;
    position: relative;
}
/* 非利宏中栏的历史结构仍可用透明底边预留高度 */
nav.fixed a[data-nav-tier="1"] {
    border-bottom: 2px solid transparent;
}
nav.fixed .lihong-nav__links a[data-nav-tier="1"] {
    border-bottom: none !important;
}

.nav-top-active {
    color: rgb(37 99 235) !important;
    border-bottom-color: rgb(37 99 235) !important;
}

.nav-mobile-active {
    background-color: rgb(239 246 255);
    color: rgb(37 99 235);
}

.group .absolute a.nav-sub-active {
    background-color: rgb(239 246 255);
    color: rgb(37 99 235);
    font-weight: 600;
}

/* 桌面中栏：占满 Grid 中间列，居中排布；溢出时可横滑并显示边缘渐隐 */
.lihong-nav__center {
    position: relative;
    isolation: isolate;
}
.lihong-nav__center::before,
.lihong-nav__center::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1.25rem;
    pointer-events: none;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.2s ease;
}
.lihong-nav__center::before {
    left: 0;
    background: linear-gradient(to right, rgba(255, 255, 255, 0.95) 0%, transparent 100%);
}
.lihong-nav__center::after {
    right: 0;
    background: linear-gradient(to left, rgba(255, 255, 255, 0.95) 0%, transparent 100%);
}
.lihong-nav__center.is-scroll-start::before {
    opacity: 0;
}
.lihong-nav__center.is-scroll-end::after {
    opacity: 0;
}
.lihong-nav__center:not(.is-scroll-start)::before,
.lihong-nav__center:not(.is-scroll-end)::after {
    opacity: 1;
}

.lihong-nav__links {
    overflow: visible;
    min-width: 0;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.lihong-nav__links--desktop {
    flex: 1 1 auto;
    min-width: 0;
    max-width: 100%;
    flex-wrap: nowrap;
}
@media (min-width: 1280px) {
    .lihong-nav__links--desktop {
        overflow-x: auto;
        overflow-y: visible;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: 2px;
        scroll-padding-inline: 0.5rem;
    }
    .lihong-nav__links--desktop::-webkit-scrollbar {
        display: none;
        height: 0;
    }
    a.lihong-nav__link--tier1 {
        padding-left: 0.25rem;
        padding-right: 0.25rem;
    }
}
@media (min-width: 1280px) and (max-width: 1439px) {
    .lihong-nav__links--desktop {
        font-size: 0.6875rem;
        gap: 0.125rem;
    }
    a.lihong-nav__link--tier1 {
        padding-left: 0.1875rem;
        padding-right: 0.1875rem;
    }
    a.lihong-nav__link--active,
    a.lihong-nav__trigger--active {
        padding-bottom: 0.375rem;
        margin-bottom: -0.375rem;
    }
    a.lihong-nav__link--active::after,
    a.lihong-nav__trigger--active::after {
        width: 1.35rem;
        height: 0.15rem;
    }
}
@media (min-width: 1440px) and (max-width: 1535px) {
    a.lihong-nav__link--tier1 {
        padding-left: 0.3125rem;
        padding-right: 0.3125rem;
    }
}
@media (min-width: 1536px) {
    a.lihong-nav__link--tier1 {
        padding-left: 0.375rem;
        padding-right: 0.375rem;
    }
}
@media (min-width: 1920px) {
    a.lihong-nav__link--tier1 {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
    }
}

/* 含下拉的整组；悬停时抬层，子菜单盖住右侧邻项，避免“产品介绍蓝 + 制造实力蓝”叠层误触 */
.lihong-nav__dropdown {
    isolation: isolate;
}
.lihong-nav__dropdown:hover,
.lihong-nav__dropdown:focus-within {
    z-index: 100;
}

/* 一级触发：无当前页时，仅本组（含子面板）悬停时变蓝，不用 Tailwind group-hover 以免与其它 group 名冲突 */
a.lihong-nav__trigger--default {
    color: rgb(31 41 55);
    font-weight: 400;
    transition: color 0.15s ease, border-color 0.15s ease;
}
.lihong-nav__dropdown:hover > a.lihong-nav__trigger--default,
.lihong-nav__dropdown:focus-within > a.lihong-nav__trigger--default {
    color: rgb(37 99 235);
}
a.lihong-nav__link--active,
a.lihong-nav__trigger--active {
    color: rgb(37 99 235);
    font-weight: 500;
    border-bottom: none !important;
    padding-bottom: 0.4375rem;
    margin-bottom: -0.4375rem;
}
a.lihong-nav__link--active::after,
a.lihong-nav__trigger--active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 1.75rem;
    max-width: 70%;
    height: 0.2rem;
    border-radius: 9999px;
    background: linear-gradient(90deg, rgb(37 99 235) 0%, rgb(59 130 246) 100%);
    box-shadow: 0 1px 3px rgba(37, 99, 235, 0.3);
    transition: width 0.2s ease, box-shadow 0.2s ease;
}
a.lihong-nav__link--active:hover::after,
a.lihong-nav__trigger--active:hover::after {
    width: 2.25rem;
    max-width: 78%;
}

/* 二级容器：由 HTML 的 hidden + group-hover:block 控制显隐，避免 opacity/visibility/pointer 与父级裁切导致无法悬停 */
.lihong-nav__sub-outer {
    right: auto;
    padding-top: 0.5rem; /* 与一级之间热区，移入时不断悬停 */
    transform: translate3d(0, 0, 0);
    transition: transform 0.16s ease, box-shadow 0.16s ease;
}
.lihong-nav__dropdown:hover .lihong-nav__sub-outer,
.lihong-nav__dropdown:focus-within .lihong-nav__sub-outer {
    transform: translate3d(0, 0, 0);
}

.lihong-nav__subpanel {
    min-width: 12rem;
    max-width: min(20rem, 85vw);
    border-radius: 0.75rem;
    border: 1px solid rgb(241 245 249);
    background: rgb(255 255 255);
    box-shadow: 0 10px 40px -10px rgba(15, 23, 42, 0.12), 0 0 0 1px rgba(15, 23, 42, 0.04);
    padding: 0.375rem;
    overflow: hidden; /* 圆角内裁切，避免子项 hover 出角 */
}
.lihong-nav__subpanel--scroll {
    max-height: min(24rem, 70vh);
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-gutter: stable;
    /* 面板内纵滚使用细条，不占用「客户说」旁视觉 */
    scrollbar-width: thin;
    scrollbar-color: rgb(203 213 225) transparent;
}
.lihong-nav__subpanel--scroll::-webkit-scrollbar {
    width: 6px;
}
.lihong-nav__subpanel--scroll::-webkit-scrollbar-thumb {
    background: rgb(203 213 225);
    border-radius: 999px;
}

a.lihong-nav__subitem {
    display: block;
    border-radius: 0.5rem;
    padding: 0.625rem 0.75rem;
    font-size: 0.875rem;
    line-height: 1.4;
    color: rgb(31 41 55);
    text-decoration: none;
    transition: background-color 0.12s ease, color 0.12s ease;
}
a.lihong-nav__subitem:hover,
a.lihong-nav__subitem:focus-visible {
    background-color: rgb(239 246 255);
    color: rgb(29 78 216);
    outline: none;
}
a.lihong-nav__subitem:focus-visible {
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.3);
}