/**
 * 前台公用头部样式（非 IGXN-EN 站点通过 head 引入；IGXN-EN 使用 theme/css/common.css 自建头部）
 */
.site-header{position:fixed;top:0;left:0;right:0;z-index:var(--z-header);max-width:2530px;margin:0 auto;background:var(--c-header);box-shadow:0 10px 20px rgba(0,85,160,.05);transition:background .4s ease,box-shadow .4s ease}
.site-header.is-scrolled{background:var(--c-header);box-shadow:0 10px 20px rgba(0,85,160,.05)}
.site-header__mask{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:calc(var(--z-header) - 1)}
.site-header__inner{max-width:calc(var(--w-page) + var(--page-gutter) * 2);margin:0 auto;padding:0 var(--page-gutter);min-height:var(--h-header);display:flex;align-items:center;justify-content:space-between;gap:20px}
.site-header__brand{display:inline-flex;align-items:center;justify-content:center;width:165px;flex-shrink:0;text-decoration:none;color:inherit}
.site-header__logo{display:block;width:100%;height:auto;max-height:44px;object-fit:contain}
.site-header__title{font-size:18px;font-weight:600;letter-spacing:-.02em;text-transform:capitalize}
.site-header__menu-btn{display:none;width:40px;height:40px;padding:0;border:0;border-radius:0;background:transparent;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.site-header__menu-btn span{display:block;width:20px;height:2px;background:var(--c-text);transition:transform .2s,opacity .2s}
.site-header.is-open .site-header__menu-btn span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.site-header.is-open .site-header__menu-btn span:nth-child(2){opacity:0}
.site-header.is-open .site-header__menu-btn span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.site-header__nav{flex:1;display:flex;justify-content:flex-end;position:relative;z-index:2}
.site-header__actions{display:flex;align-items:center;gap:12px;flex-shrink:0;position:relative;z-index:3}
.mlang{position:relative}
.mlang__btn{display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:6px 10px;border:1px solid rgba(0,0,0,.1);border-radius:8px;background:rgba(255,255,255,.85);color:#333;font-size:14px;font-weight:500;line-height:1;cursor:pointer;transition:color .25s ease,border-color .25s ease,background .25s ease,box-shadow .25s ease}
.mlang__btn:hover,.mlang__btn:focus-visible{color:var(--c-accent);border-color:rgba(0,0,0,.16);background:#fff;outline:none;box-shadow:0 4px 12px rgba(0,0,0,.06)}
.mlang__globe{flex-shrink:0;opacity:.7}
.mlang__label{white-space:nowrap}
.mlang__arrow{flex-shrink:0;opacity:.55;transition:transform .25s ease,opacity .25s ease}
.mlang.is-open .mlang__arrow{transform:rotate(180deg);opacity:1}
.mlang__menu{list-style:none;margin:0;padding:6px 0;position:absolute;top:calc(100% + 6px);right:0;min-width:140px;background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:10px;box-shadow:0 10px 32px rgba(0,0,0,.12);z-index:40}
.mlang__item{margin:0}
.mlang__link{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 14px;text-decoration:none;color:#444;font-size:14px;line-height:1.4;transition:color .2s ease,background .2s ease}
.mlang__link:hover,.mlang__link:focus-visible{color:var(--c-accent);background:rgba(0,0,0,.04);outline:none}
.mlang__link--active{color:var(--c-accent);font-weight:600}
.mlang__check{flex-shrink:0;color:var(--c-accent)}
.mlang__item + .mlang__item{border-top:1px solid var(--c-line)}
body.has-float-header .site-header:not(.is-scrolled):not(.is-open) .mlang__btn{color:#fff;border-color:rgba(255,255,255,.35);background:rgba(255,255,255,.08)}
body.has-float-header .site-header:not(.is-scrolled):not(.is-open) .mlang__btn:hover,body.has-float-header .site-header:not(.is-scrolled):not(.is-open) .mlang__btn:focus-visible{color:#fff;border-color:rgba(255,255,255,.55);background:rgba(255,255,255,.14)}
.mnav,.mnav__sub{list-style:none;margin:0;padding:0}
.mnav{display:flex;align-items:center;gap:0}
.mnav__item{position:relative;font-size:16px}
.mnav__link,.mnav__sublink{display:flex;align-items:center;justify-content:center;gap:5px;padding:0;min-height:var(--h-header);text-decoration:none;color:#333;font-size:18px;font-weight:500;line-height:30px;text-transform:capitalize;border-radius:0;background:transparent;transition:color .4s ease-in-out;white-space:nowrap}
.mnav__link:hover,.mnav__sublink:hover,.mnav__link:focus-visible,.mnav__sublink:focus-visible{color:var(--c-accent);background:transparent;outline:none}
body.has-float-header .site-header:not(.is-scrolled):not(.is-open) .mnav__link{color:#fff}
body.has-float-header .site-header:not(.is-scrolled):not(.is-open) .mnav__link:hover{color:#fff}
.mnav__arrow{display:block;flex-shrink:0;color:currentColor;opacity:.55;transition:transform .25s ease,color .25s ease,opacity .25s ease}
.mnav__link--parent:hover .mnav__arrow,.mnav__sublink--parent:hover .mnav__arrow,.mnav__item--drop:focus-within > .mnav__link--parent .mnav__arrow,.mnav__sub-item--drop:focus-within > .mnav__sublink--parent .mnav__arrow{opacity:1}
.mnav__item--drop:hover > .mnav__link--parent .mnav__arrow,.mnav__item--drop:focus-within > .mnav__link--parent .mnav__arrow{transform:rotate(180deg);color:#fff}
.mnav__arrow--sub{width:10px;height:10px;transform:rotate(-90deg)}
.mnav__sub-item--drop:hover > .mnav__sublink--parent .mnav__arrow--sub,.mnav__sub-item--drop:focus-within > .mnav__sublink--parent .mnav__arrow--sub{transform:rotate(-90deg);color:var(--c-accent)}
.mnav__item--drop{position:relative}
.mnav__item--drop > .mnav__sub{position:absolute;left:50%;top:calc(100% - 8px);min-width:180px;width:max-content;max-width:100vw;margin:0;padding:12px 0;display:flex;flex-direction:column;background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:12px;box-shadow:0 10px 40px rgba(0,0,0,.12);opacity:0;visibility:hidden;transform:translateX(-50%);transition:opacity .3s ease,visibility .3s ease;z-index:30;pointer-events:none}
.mnav__item--drop:hover > .mnav__sub,.mnav__item--drop:focus-within > .mnav__sub{opacity:1;visibility:visible;pointer-events:auto}
.mnav__item--drop > .mnav__sub::after{content:"";position:absolute;top:-13px;left:50%;transform:translateX(-50%);width:30px;height:26px;border-bottom:13px solid #fff;border-left:15px solid transparent;border-right:15px solid transparent;pointer-events:none}
body.has-float-header .site-header:not(.is-scrolled) .mnav__item--drop > .mnav__sub{background:rgba(255,255,255,.97);backdrop-filter:blur(10px)}
body.has-float-header .site-header:not(.is-scrolled) .mnav__item--drop > .mnav__sub::after{border-bottom-color:rgba(255,255,255,.97)}
.mnav__item--drop > .mnav__sub > .mnav__sub-item{position:relative}
.mnav__sublink{min-height:0;width:100%;justify-content:space-between;gap:12px;padding:10px 20px;font-size:15px;font-weight:400;line-height:1.45;text-transform:none;color:#444;border-radius:0;transition:color .2s ease,background .2s ease}
.mnav__item--drop > .mnav__sub > .mnav__sub-item + .mnav__sub-item{border-top:1px solid var(--c-line)}
.mnav__item--drop > .mnav__sub .mnav__sublink:hover,.mnav__item--drop > .mnav__sub .mnav__sublink:focus-visible{color:var(--c-accent);background:rgba(0,0,0,.04)}
.mnav__sub-item--drop{position:relative}
.mnav__sub--lvl2{position:absolute;top:-6px;left:calc(100% + 4px);min-width:200px;margin:0;padding:8px 0;background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:10px;box-shadow:0 8px 32px rgba(0,0,0,.1);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s ease,visibility .2s ease,transform .2s ease;transform:translateX(4px);z-index:31}
body.has-float-header .site-header:not(.is-scrolled) .mnav__sub--lvl2{background:rgba(255,255,255,.97);backdrop-filter:blur(10px);border-color:rgba(0,0,0,.05)}
.mnav__sub--lvl2::before{content:"";position:absolute;left:-10px;top:0;bottom:0;width:10px}
.mnav__sub-item--drop:hover > .mnav__sub--lvl2,.mnav__sub-item--drop:focus-within > .mnav__sub--lvl2{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(0)}
.mnav__sub--lvl2 > .mnav__sub-item + .mnav__sub-item{border-top:1px solid var(--c-line)}
.mnav__sub--lvl2 .mnav__sublink{font-size:14px;color:#555;padding:8px 16px;gap:8px}
.mnav__sub--lvl2 .mnav__sublink:hover,.mnav__sub--lvl2 .mnav__sublink:focus-visible{color:var(--c-accent);background:rgba(0,0,0,.04)}
body{padding-top:var(--h-header)}
body.has-float-header{padding-top:0}
@media (max-width:1470px){
    .mnav__item{margin:0 15px}
    .mnav__link{font-size:18px}
}
@media (max-width:1380px){
    .site-header__inner{padding:10px var(--page-gutter)}
    .mnav__link{font-size:16px}
    .mnav__item{margin:0 5px}
}
@media (max-width:1200px){
    .site-header__brand{width:120px}
}
@media (max-width:991px){
    body{padding-top:var(--h-header-mb);font-size:14px}
    body.has-float-header{padding-top:var(--h-header-mb)}
    .site-header{background:#fff;border-bottom:1px solid var(--c-line);box-shadow:none}
    body.has-float-header .site-header:not(.is-scrolled){background:#fff}
    .site-header__inner{min-height:var(--h-header-mb);padding:0 var(--page-gutter)}
    .site-header__actions{margin-left:auto;gap:8px}
    .site-header__brand{width:50%;justify-content:flex-start}
    .site-header__logo{height:30px;width:auto;max-height:none}
    .site-header__menu-btn{display:inline-flex;width:auto;padding:8px 12px}
    .mlang__btn{min-height:32px;padding:5px 8px;font-size:13px;background:#fff;border-color:var(--c-line)}
    body.has-float-header .site-header .mlang__btn{color:#111;border-color:var(--c-line);background:#fff}
    .site-header__nav{position:fixed;top:0;right:-78%;bottom:0;width:78%;max-width:none;background:#fff;padding:15px 10px;overflow-y:auto;transform:none;transition:right .3s ease;box-shadow:none;z-index:calc(var(--z-header) + 1)}
    .site-header.is-open .site-header__nav{right:0;transform:none}
    .mnav{flex-direction:column;align-items:stretch;gap:0;width:100%;padding:0 5px}
    .mnav__item{margin:0;padding:10px 0;border-bottom:1px solid #f2f2f2}
    .mnav__link,.mnav__sublink{min-height:0;justify-content:flex-start;padding:0;font-size:16px;font-weight:500;text-transform:uppercase;color:#111;border-bottom:none}
    body.has-float-header .site-header .mnav__link{color:#111}
    .mnav__link:hover,.mnav__sublink:hover{color:var(--c-accent)}
    .mnav__link--parent,.mnav__sublink--parent{justify-content:space-between;width:100%}
    .mnav__item--drop > .mnav__sub,.mnav__sub--lvl2{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;border-radius:0;background:transparent;backdrop-filter:none;padding:0 0 0 15px;margin:0;min-width:0;width:100%;max-width:none;pointer-events:auto;display:none;margin-top:6px;border-left:2px solid var(--c-line)}
    .mnav__item--drop > .mnav__sub::after{display:none}
    .mnav__item--drop.is-open > .mnav__sub,.mnav__sub-item--drop.is-open > .mnav__sub--lvl2{display:block}
    .mnav__sub-item{padding:2px 0}
    .mnav__sub-item .mnav__sublink{font-size:14px;text-transform:none;color:#666;padding:6px 0;background:transparent}
    .mnav__sub-item .mnav__sublink:hover{background:transparent}
    .mnav__sub--lvl2 .mnav__sublink{font-size:13px;color:#777;padding:5px 0 5px 12px}
    .mnav__sub-item--drop > .mnav__sub--lvl2{margin-top:4px;border-left:2px solid rgba(0,0,0,.08)}
    .mnav__item--drop > .mnav__sub > .mnav__sub-item + .mnav__sub-item,.mnav__sub--lvl2 > .mnav__sub-item + .mnav__sub-item{border-top:none}
    .mnav__arrow{margin-left:auto}
    .mnav__arrow--sub{transform:none}
    .mnav__item--drop.is-open > .mnav__link--parent .mnav__arrow,.mnav__sub-item--drop.is-open > .mnav__sublink--parent .mnav__arrow--sub{transform:rotate(180deg);color:var(--c-accent);opacity:1}
}