@import url("components/site-search.css");

/* 全站顶栏：全宽背景，内容区视口居中，与正文宽度无关 */
.site-brand-bar {
    display: block;
    width: 100%;
    background: #fff;
    border-bottom: 1px solid #e8e8e8;
    box-sizing: border-box;
    position: relative;
    z-index: 210;
    overflow: visible;
}

.site-brand-bar.nav-mega-open {
    z-index: 300;
}

.site-brand-bar-side {
    display: none;
}

.site-brand-bar-inner {
    width: 100%;
    max-width: none;
    margin: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, var(--site-chrome-width)) minmax(0, 1fr);
    align-items: center;
    gap: 0;
    padding: 0;
    box-sizing: border-box;
    min-width: 0;
    min-height: 44px;
}

.site-brand-brand-slot {
    grid-column: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
    min-height: 44px;
    padding: 0 16px 0 12px;
    box-sizing: border-box;
    overflow: hidden;
}

.site-brand-center {
    grid-column: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    min-width: 0;
    width: 100%;
    max-width: var(--site-chrome-width);
    overflow: hidden;
    min-height: 44px;
    padding: 0 30px;
    box-sizing: border-box;
    position: relative;
    z-index: 1;
}

.site-brand-brand {
    flex-shrink: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0;
    min-width: 0;
    max-width: 100%;
}

.site-brand-brand .nav-brand-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.site-brand-menu {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.site-brand-search-slot {
    grid-column: 3;
    justify-self: start;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    overflow: visible;
    padding: 4px 16px 4px 12px;
}

/* 移动端汉堡菜单按钮：功能尚未接入，先隐藏避免空按钮在顶栏底部露出线条 */
.site-brand-menu-toggle {
    display: none;
}

.site-brand-menu .nav-menu-level1 {
    display: flex;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: center;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
    gap: 4px;
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    pointer-events: none;
}

.site-brand-menu .nav-menu-level1 > * {
    pointer-events: auto;
}

.site-brand-menu .nav-menu-level1::-webkit-scrollbar {
    display: none;
}

.site-brand-bar .nav-dropdown,
.site-brand-bar .nav-menu-item.nav-level1-item {
    align-items: center;
    align-self: center;
    position: relative;
    overflow: visible;
}

.site-brand-bar .nav-level1-link,
.site-brand-bar .nav-level1-item > a {
    align-items: center;
    height: auto;
    position: relative;
}

.site-brand-bar .nav-level1-item.active .nav-level1-label::after {
    display: none;
}

.site-brand-bar .nav-level1-item.active > .nav-level1-link::after,
.site-brand-bar .nav-level1-item.active > a::after {
    display: none;
}

.site-brand-bar .nav-brand-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    min-width: 0;
    max-width: 100%;
}

.site-brand-bar .nav-brand-mark {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    display: block;
    border-radius: 6px;
    object-fit: contain;
}

.site-brand-bar .nav-brand-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1677ff;
    line-height: 1.2;
    white-space: nowrap;
}

.site-brand-bar .nav-brand-link:hover .nav-brand-text {
    color: #1677ff;
    opacity: 0.85;
}

.site-brand-bar .nav-level1-item > a,
.site-brand-bar .nav-level1-link {
    color: #595959;
    white-space: nowrap;
    font-weight: 500;
    font-size: 14px;
    padding: 8px 6px;
    gap: 4px;
    transition: color 0.15s;
}

.site-brand-bar .nav-level1-item > a:hover,
.site-brand-bar .nav-level1-link:hover,
.site-brand-bar .nav-dropdown:hover .nav-level1-link {
    color: var(--site-primary);
}

.site-brand-bar .nav-level1-item.active > a,
.site-brand-bar .nav-level1-item.active > .nav-level1-link {
    color: #1677ff;
    font-weight: 600;
}

.site-brand-bar:has(.site-search-result-panel.is-open) {
    z-index: 310;
}

body.site-search-open .nav-bottom-menu {
    border-bottom-color: transparent;
}

.site-brand-bar .nav-level1-item-icon > .nav-level1-icon-link {
    padding: 8px 10px;
    line-height: 0;
}

.site-brand-bar .nav-level1-icon-star {
    width: 18px;
    height: 18px;
    display: block;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.6;
    stroke-linejoin: round;
}

.site-brand-bar .nav-level1-item-icon.active > .nav-level1-icon-link::after {
    display: none;
}

.site-brand-bar .nav-mega-panel {
    top: 100%;
    margin-top: 0;
    z-index: 600;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-top: 1px solid #ddd;
    border-radius: 0 0 4px 4px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.14);
}

/* 顶栏一级菜单下拉：挂到 body 后避免被横向滚动容器裁切 */
.nav-mega-panel.nav-mega-panel-portal {
    display: block;
    position: fixed;
    z-index: 1000;
    margin-top: 0;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 0 0 4px 4px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.14);
}

.site-brand-bar .nav-mega-panel::before {
    top: -12px;
    height: 12px;
}

.site-brand-bar .nav-level1-item-icon.active .nav-level1-icon-star {
    fill: currentColor;
    stroke: currentColor;
}

/* 二级菜单容器 */
.nav-top-menu-wrapper {
    background: #fff;
    width: 100%;
    padding-top: 0;
    padding-bottom: 18px;
    box-sizing: border-box;
    border-radius: 8px;
    position: relative;
    z-index: 200;
    overflow: visible;
}

.nav-top-menu-wrapper:has(#site-nav .nav-bottom-menu) {
    /* padding-top: 8px; */
}

.nav-top-menu-wrapper:has(#site-nav:empty) {
    display: none;
}

body.level2-nav-off .nav-top-menu-wrapper {
    display: none;
}

.nav-logo {
    display: flex;
    align-items: center;
    line-height: 1;
}

#site-nav {
    position: relative;
    width: 100%;
}

.nav-top-menu {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0;
    padding: 6px 20px 8px 0;
    min-height: 36px;
    box-sizing: border-box;
}

.nav-bottom-menu {
    display: flex;
    align-items: stretch;
    justify-content: flex-start;
    padding: 0 20px 0 0;
    border-bottom: 1px solid #e8e8e8;
    min-height: 44px;
    box-sizing: border-box;
    overflow: visible;
}

.nav-bottom-menu-placeholder {
    visibility: hidden;
    pointer-events: none;
    user-select: none;
}

.nav-bottom-menu > .nav-menu-level2 {
    width: 100%;
}

.nav-menu {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    height: 100%;
}

.nav-menu-level1 {
    gap: 8px;
}

.nav-menu-item,
.nav-menu-bottom-item,
.nav-dropdown {
    display: flex;
    align-items: center;
    cursor: pointer;
    margin-left: 0;
}

.nav-dropdown {
    position: relative;
}

.margin-left-none {
    margin-left: 0;
}

/* 一级菜单链接（普通 + 下拉共用） */
.nav-level1-item > a,
.nav-level1-link {
    text-decoration: none;
    color: #444;
    font-size: 14px;
    font-weight: 400;
    padding: 8px 6px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    line-height: 1;
    box-sizing: border-box;
    transition: color 0.15s;
}

.nav-level1-label {
    position: relative;
}

.nav-level1-item.active .nav-level1-label::after {
    display: none;
}

.nav-level1-item > a:hover,
.nav-level1-link:hover,
.nav-dropdown:hover .nav-level1-link {
    color: var(--site-primary);
}

.nav-level1-item.active > a,
.nav-level1-item.active > .nav-level1-link {
    color: #1677ff;
    font-weight: 600;
}

/* 带 Mega Menu 的下拉 */
.nav-caret {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid currentColor;
    opacity: 0.5;
    flex-shrink: 0;
}

.nav-menu-level2 {
    gap: 0;
    margin-left: 0;
    padding-left: 0;
    flex: 1;
    min-width: 0;
    flex-wrap: nowrap;
    overflow: visible;
    align-items: stretch;
}

.nav-menu-level2::-webkit-scrollbar {
    display: none;
}

/* 二级菜单：竖线分隔 */
.nav-level2-item,
.nav-level2-more {
    position: relative;
    flex-shrink: 0;
    display: flex;
    align-items: stretch;
}

.nav-level2-more {
    overflow: visible;
    flex-shrink: 0;
}

.nav-level2-item:not(:last-child)::after,
.nav-level2-more:not(:last-child)::after {
    content: "";
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 16px;
    background: #dcdcdc;
    pointer-events: none;
}

.nav-level2-item a,
.nav-level2-more-link {
    text-decoration: none;
    color: #333;
    font-size: 12.6px;
    font-weight: 400;
    line-height: 1;
    padding: 14px 14px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
    box-sizing: border-box;
    transition: color 0.15s;
}

.nav-level2-item.active a,
.nav-level2-more.active .nav-level2-more-link {
    color: #1677ff;
    font-weight: 600;
}

.nav-level2-item a:hover,
.nav-level2-more-link:hover,
.nav-level2-more:hover .nav-level2-more-link {
    color: var(--site-primary);
}

.nav-level2-more-panel {
    right: 0;
    left: auto;
    min-width: 160px;
    padding: 6px 0;
    z-index: 400;
}

.nav-level2-more-panel.nav-level2-more-panel-portal {
    display: block;
    position: fixed;
    z-index: 1000;
    background: #fff;
    border: 1px solid #ebebeb;
    border-radius: 8px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.nav-level2-more:hover .nav-level2-more-panel,
.nav-level2-more.is-open .nav-level2-more-panel {
    display: block;
}

.nav-level2-more-panel a {
    display: block;
    text-decoration: none;
    color: #333;
    font-size: 12.6px;
    line-height: 1.4;
    white-space: nowrap;
    padding: 8px 16px;
    font-weight: 400;
    transition: color 0.15s, background-color 0.15s;
}

.nav-level2-more-panel a:hover {
    color: var(--site-primary);
    background: #fafafa;
}

.nav-level2-more-panel a.active {
    color: var(--site-primary);
    font-weight: 400;
}

/* Mega Menu 面板：紧贴当前菜单项下方 */
.nav-mega-panel {
    display: none;
    position: absolute;
    top: calc(100% - 1px);
    left: 0;
    min-width: 140px;
    width: max-content;
    max-width: 420px;
    background: #fff;
    border: 1px solid #ebebeb;
    border-radius: 8px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
    padding: 8px 12px;
    box-sizing: border-box;
    z-index: 300;
}

/* 透明桥接区，防止鼠标移动时 hover 断开 */
.nav-mega-panel::before {
    content: "";
    position: absolute;
    left: -8px;
    right: -8px;
    top: -10px;
    height: 12px;
}

.nav-dropdown.is-open .nav-mega-panel,
.nav-dropdown:hover .nav-mega-panel {
    display: block;
}

/* 下拉展开时，仅禁用二级横条鼠标事件，避免挡住一级下拉；面板关闭后恢复可点 */
.nav-top-menu-wrapper.nav-mega-open .nav-bottom-menu:not(:hover) {
    pointer-events: none;
}

.nav-mega-panel[data-columns="2"],
.nav-mega-panel--cols-2 {
    max-width: 520px;
}

.nav-mega-panel[data-columns="3"],
.nav-mega-panel--cols-3 {
    max-width: 680px;
}

.nav-mega-panel[data-columns="4"],
.nav-mega-panel--cols-4 {
    max-width: 840px;
}

.nav-mega-sections {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.nav-mega-section {
    padding: 2px 0;
}

.nav-mega-section-divider {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid #ddd;
}

.nav-mega-section-title {
    margin: 0 0 6px;
    font-size: 12px;
    line-height: 1.4;
    color: #888;
    font-weight: 500;
}

.nav-mega-list {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
}

.nav-mega-list a {
    text-decoration: none;
    color: #444;
    font-size: 12.8px;
    line-height: 1.4;
    white-space: nowrap;
    padding: 4px 8px;
    margin: 0 -8px;
    border-radius: 4px;
    border-bottom: none;
    font-weight: 400;
    transition: color 0.15s, background-color 0.15s;
}

.nav-mega-list a:hover {
    color: #1677ff;
    background: #e6f4ff;
}

.nav-mega-list a.active {
    color: #1677ff;
    font-weight: 600;
    background: transparent;
}

.nav-mega-list a.active:hover {
    background: #e6f4ff;
}

.nav-mega-columns {
    display: grid;
    grid-template-columns: repeat(var(--nav-mega-cols, 2), minmax(0, 1fr));
    align-items: start;
    gap: 12px 20px;
}

.nav-mega-panel--cols-1 .nav-mega-columns {
    --nav-mega-cols: 1;
}

.nav-mega-panel--cols-2 .nav-mega-columns,
.nav-mega-panel[data-columns="2"] .nav-mega-columns {
    --nav-mega-cols: 2;
}

.nav-mega-panel--cols-3 .nav-mega-columns,
.nav-mega-panel[data-columns="3"] .nav-mega-columns {
    --nav-mega-cols: 3;
}

.nav-mega-panel--cols-4 .nav-mega-columns,
.nav-mega-panel[data-columns="4"] .nav-mega-columns {
    --nav-mega-cols: 4;
}

.nav-mega-col {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.nav-mega-col a {
    text-decoration: none;
    color: #444;
    font-size: 12.8px;
    line-height: 1.4;
    white-space: nowrap;
    padding: 4px 8px;
    margin: 0 -8px;
    border-radius: 4px;
    border-bottom: none;
    font-weight: 400;
    transition: color 0.15s, background-color 0.15s;
}

.nav-mega-col a:hover {
    color: #1677ff;
    background: #e6f4ff;
}

.nav-mega-col a.active {
    color: #1677ff;
    font-weight: 600;
    background: transparent;
}

.nav-mega-col a.active:hover {
    background: #e6f4ff;
}

@media screen and (max-width: 1320px) {
    .site-brand-bar-inner {
        grid-template-columns: auto minmax(0, 1fr) auto;
    }

    .site-brand-brand-slot {
        max-width: 168px;
        padding: 0 12px 0 10px;
        justify-content: center;
    }

    .site-brand-center {
        max-width: none;
        padding: 0 16px;
    }

    .site-brand-search-slot {
        padding: 4px 10px 4px 0;
    }
}

@media screen and (max-width: 1080px) {
    .site-brand-brand-slot {
        max-width: 120px;
        padding: 0 8px 0 10px;
    }

    .site-brand-center {
        padding: 0 12px;
    }
}

@media screen and (max-width: 768px) {
    .nav-menu-level2 {
        overflow: visible;
    }

    .nav-mega-panel {
        max-width: calc(100vw - 40px);
        padding: 8px 10px;
    }

    .nav-mega-panel[data-columns="2"],
    .nav-mega-panel[data-columns="3"],
    .nav-mega-panel[data-columns="4"],
    .nav-mega-panel--cols-2,
    .nav-mega-panel--cols-3,
    .nav-mega-panel--cols-4 {
        max-width: calc(100vw - 40px);
    }

    .nav-mega-columns {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .nav-mega-col a {
        white-space: normal;
    }
}