/* ============================================================
   艺友官网 · Header V1.0 (方案 B 淡蓝科技)

   视觉令牌优先引用 wwwroot/home/theme-b.css；首页已经载入该层，
   这里在 .public-header 作用域内提供一份等值兜底，使内页（不走
   theme-b.css）也能渲染出与首页一致的颜色与字体。
   ============================================================ */

.public-header {
    --c-brand:        #1F5FBF;
    --c-brand-bright: #3F8CFF;
    --c-brand-deep:   #163A7A;
    --c-accent:       #F0C330;
    --c-bg:           #FFFFFF;
    --c-bg-soft:      #F5F8FC;
    --c-bg-blue:      #EAF4FF;
    --c-border:       #D9E4F2;
    --c-title:        #163A7A;
    --c-text:         #4B5D73;
    --c-muted:        #8A9BB0;

    --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
                 "Noto Sans SC", "Source Han Sans SC", "Hiragino Sans GB",
                 Inter, "Segoe UI", system-ui, -apple-system, sans-serif;
    --font-en: Inter, "Segoe UI", system-ui, -apple-system, sans-serif;

    --radius-sm: 8px;

    --ease: cubic-bezier(.4, 0, .2, 1);
    --dur: .25s;
}

/* site.css 把这两个变量加到 --page-hero-offset 的 calc 里，
   顶部条已删除，所以这里把 topbar 高度归零、header 提到 80。 */
:root {
    --public-topbar-height: 0px;
    --public-header-height: 80px;
}

.public-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--c-bg);
    border-bottom: 1px solid transparent;
    box-shadow: none;
    font-family: var(--font-sans);
    color: var(--c-text);
    transition: box-shadow var(--dur) var(--ease),
                border-color var(--dur) var(--ease);
}

/* site.js 在 scrollY > 20 时切这个 class，仅用于增加一条轻微下边线/阴影 */
.public-header.header--scrolled {
    border-bottom-color: var(--c-border);
    box-shadow: 0 4px 16px rgba(22, 58, 122, .06);
}

.public-header__container {
    width: calc(100% - 64px);
    margin-inline: auto;
}

.public-header__inner {
    min-height: var(--public-header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

/* ---------- Logo ---------- */

.public-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--c-brand-deep);
    text-decoration: none;
    min-width: 0;
}
/* 2026-10-10 客户反馈：公司名与导航字号放大（16→19 / 16→18），logo 同步 48→54。 */
.public-logo img {
    width: 54px;
    height: 54px;
    object-fit: contain;
    flex: none;
}
.public-logo__text {
    display: grid;
    line-height: 1.25;
    min-width: 0;
}
.public-logo__text strong {
    color: var(--c-brand-deep);
    font-size: 19px;
    font-weight: 700;
    letter-spacing: .02em;
    white-space: nowrap;
}
.public-logo__text small {
    color: var(--c-muted);
    font-family: var(--font-en);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: .04em;
    white-space: nowrap;
    margin-top: 2px;
}

/* ---------- 主导航 (桌面端) ---------- */

.public-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-left: auto;
}

.public-nav__list {
    display: flex;
    align-items: center;
    gap: 2px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.public-nav__dropdown { position: relative; }
/* 父级透明缓冲区覆盖下拉层上方留白，使鼠标移动路径始终保持 :hover。 */
.public-nav__dropdown::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    width: 196px;
    height: 12px;
    transform: translateX(-50%);
}
.public-nav__sub {
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    z-index: 10;
    width: 196px;
    margin: 0;
    padding: 4px 0;
    list-style: none;
    background: rgba(255, 255, 255, .98);
    border: 0;
    border-radius: 8px;
    box-shadow: 0 12px 28px rgba(22, 58, 122, .12),
                0 2px 8px rgba(22, 58, 122, .05);
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, 6px);
    transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}
.public-nav__dropdown:hover .public-nav__sub,
.public-nav__dropdown:focus-within .public-nav__sub {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, 0);
}
.public-nav__sub a {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 48px;
    padding: 0 22px;
    color: var(--c-text);
    text-decoration: none;
    white-space: nowrap;
    font-size: 16px;
    font-weight: 500;
    border-radius: 4px;
    transition: color 180ms var(--ease), background-color 180ms var(--ease);
}
.public-nav__sub a::before {
    content: "";
    position: absolute;
    top: 10px;
    bottom: 10px;
    left: 0;
    width: 3px;
    border-radius: 0 2px 2px 0;
    background: var(--c-brand);
    opacity: 0;
    transform: scaleY(.45);
    transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}
.public-nav__sub a:hover,
.public-nav__sub a:focus-visible { color: var(--c-brand); background: #F4F8FF; }
.public-nav__sub a:hover::before,
.public-nav__sub a:focus-visible::before { opacity: 1; transform: scaleY(1); }
.public-nav__sub a.active { color: var(--c-brand); font-weight: 600; background: #F4F8FF; }

.public-nav__link {
    position: relative;
    display: inline-block;
    padding: 14px 14px;
    color: var(--c-brand-deep);
    text-decoration: none;
    font-size: 18px;
    font-weight: 500;
    white-space: nowrap;
    transition: color var(--dur) var(--ease);
}

.public-nav__link:hover { color: var(--c-brand); }

.public-nav__link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 10px;
    width: 0;
    height: 2px;
    border-radius: 2px;
    background: var(--c-accent);
    transform: translateX(-50%);
    transition: width var(--dur) var(--ease);
}

.public-nav__link.active { color: var(--c-brand); }
.public-nav__link.active::after,
.public-nav__link:hover::after { width: 24px; }
.public-nav__dropdown > .public-nav__link.active::after { width: 42px; }

/* ---------- 语言切换 ---------- */

.public-nav__lang {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0 8px 16px;
    border-left: 1px solid var(--c-border);
    color: var(--c-text);
    font-size: 14px;
    white-space: nowrap;
}
.public-nav__lang-icon {
    width: 18px;
    height: 18px;
    color: var(--c-brand);
    flex: none;
}
.public-nav__lang a {
    color: var(--c-text);
    text-decoration: none;
    transition: color var(--dur) var(--ease);
}
.public-nav__lang a:hover { color: var(--c-brand); }
.public-nav__lang a.active {
    color: var(--c-brand);
    font-weight: 600;
}
.public-nav__lang i {
    color: var(--c-border);
    font-style: normal;
}

/* ---------- 汉堡按钮 (移动端) ---------- */

.public-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 10px;
    cursor: pointer;
    transition: background var(--dur) var(--ease);
}
.public-nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background: var(--c-brand-deep);
    transition: transform var(--dur) var(--ease),
                opacity var(--dur) var(--ease),
                background var(--dur) var(--ease);
}
.public-nav-toggle:active { background: var(--c-bg-blue, #EAF4FF); }

/* 展开时收成叉：位移量正好等于 gap(5) + 线高(2)，叉心不偏 */
.public-nav-toggle.active { background: var(--c-bg-blue, #EAF4FF); }
.public-nav-toggle.active span { background: var(--c-brand); }
.public-nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.public-nav-toggle.active span:nth-child(2) { opacity: 0; }
.public-nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   响应式
   ============================================================ */

/* 2026-10-10 字号放大后按三语实测重新划分断点（单行所需宽度：中 1176 / 日 1248 / 英 1407）：
   - 导航居中只在放得下时启用：中日 >= 1440，英文公司名更长，>= 1720；
   - 1200 以下改用汉堡菜单（原先 900，但 900–1200 之间三语都会挤到换行或重叠）。 */
@media (min-width: 1440px) {
    html:not([lang="en"]) .public-header__inner { position: relative; }
    html:not([lang="en"]) .public-nav__list {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }
}

@media (min-width: 1720px) {
    html[lang="en"] .public-header__inner { position: relative; }
    html[lang="en"] .public-nav__list {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }
}

@media (min-width: 1200px) and (max-width: 1439px) {
    html[lang="en"] .public-logo__text strong {
        max-width: 230px;
        white-space: normal;
        font-size: 17px;
        line-height: 1.2;
    }
}

@media (min-width: 1200px) and (max-width: 1279px) {
    .public-nav__link { padding: 14px 11px; font-size: 17px; }
}

@media (max-width: 1199px) {
    :root { --public-header-height: 68px; }

    .public-header__inner { gap: 12px; }
    .public-logo { flex: 1 1 auto; }
    .public-logo__text strong { font-size: 14px; }
    .public-logo__text small { font-size: 11px; }

    .public-nav-toggle { display: inline-flex; flex: 0 0 44px; }

    /* site.js 在打开时给 .public-nav 加 .nav--open，关闭时移除；
       关闭时整体 display:none 避免占位、避免横向滚动溢出。 */
    .public-nav {
        position: fixed;
        top: var(--public-header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        max-height: calc(100vh - var(--public-header-height));
        padding: 8px 0 20px;
        background: var(--c-bg);
        box-shadow: 0 14px 30px rgba(22, 58, 122, .14);
        transform: translateX(100%);
        transition: transform var(--dur) var(--ease);
        overflow-y: auto;
        margin-left: 0;
    }
    .public-nav.nav--open { transform: none; }
    .public-nav:not(.nav--open) { display: none; }

    .public-nav__list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }
    .public-nav__dropdown { position: static; }
    .public-nav__dropdown::after { display: none; }
    .public-nav__sub {
        position: static;
        width: auto;
        min-width: 0;
        padding: 0 0 0 18px;
        border: 0;
        box-shadow: none;
        display: none;
        transform: none;
    }
    .public-nav__sub a::before { display: none; }
    .public-nav__sub a { padding: 11px 24px; color: var(--c-text); font-size: 15px; }
    .public-nav__dropdown:hover .public-nav__sub,
    .public-nav__dropdown:focus-within .public-nav__sub {
        display: none;
        padding: 0 0 0 18px;
        transform: none;
    }
    .public-nav__dropdown.nav-item--open > .public-nav__sub {
        display: block;
        padding: 0 0 4px 18px;
        opacity: 1;
        pointer-events: auto;
    }
    /* 必须是 block：inline-block 时分隔线只有文字那么宽，
       整行也点不到，是移动端菜单最明显的两个问题 */
    .public-nav__link {
        display: block;
        padding: 15px 24px;
        font-size: 16px;
        border-bottom: 1px solid var(--c-border);
    }
    .public-nav__list li:last-child .public-nav__link { border-bottom: 0; }

    /* 竖排菜单用左侧色条标当前项，比底部小横线更清楚 */
    .public-nav__link::after {
        left: 0;
        top: 0;
        bottom: 0;
        width: 0;
        height: auto;
        border-radius: 0;
        transform: none;
        transition: width var(--dur) var(--ease);
    }
    .public-nav__link.active {
        background: var(--c-bg-blue, #EAF4FF);
        color: var(--c-brand);
        font-weight: 600;
    }
    .public-nav__link.active::after { width: 3px; }
    .public-nav__dropdown > .public-nav__link.active::after { width: 3px; }
    .public-nav__link:hover::after { width: 0; }
    .public-nav__link:active { background: var(--c-bg-blue, #EAF4FF); }

    .public-nav__lang {
        margin-top: 4px;
        padding: 16px 24px calc(16px + env(safe-area-inset-bottom, 0px));
        border-left: 0;
        border-top: 1px solid var(--c-border);
        justify-content: flex-start;
        font-size: 14px;
        gap: 10px;
    }
    .public-nav__lang a { padding: 6px 4px; }
}

@media (max-width: 640px) {
    .public-header__container { width: min(100% - 32px, 1280px); }
    .public-logo img { width: 42px; height: 42px; }
    /* 公司名较长时允许折行，避免与汉堡按钮抢位置 */
    .public-logo__text strong {
        font-size: 13px;
        max-width: 200px;
        overflow-wrap: anywhere;
    }
    .public-logo__text small { font-size: 10px; }
    .public-nav__lang { flex-wrap: wrap; }
}

@media (max-width: 360px) {
    .public-logo__text strong { max-width: 160px; font-size: 12px; }
}

/* 防止移动端 panel 横向溢出 (与 V0 一致) */
@media (max-width: 1199px) {
    html, body { overflow-x: hidden; }
}

/* 英文站点公司名与英文副名相同，隐藏副名避免同一行重复两次 */
html[lang="en"] .public-logo__text small {
    display: none;
}

@media (max-width: 640px) {
    html[lang="en"] .public-logo__text strong {
        max-width: 100%;
        white-space: normal;
        line-height: 1.15;
    }
}