/* ========== 头部语言下拉 .head-lang ========== */
.head-lang {
    position: relative;
    margin-left: 16px;
}
.head-lang .lang {
    position: relative;
}
.head-lang .lang-icon {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: 6px;
    transition: background-color 0.2s;
    user-select: none;
}
.head-lang .lang-icon:hover {
    background-color: rgba(255,255,255,0.1);
}
.head-lang .lang-icon img {
    display: block;
    flex-shrink: 0;
}
.head-lang .lang-icon > span {
    font-size: 14px;
    white-space: nowrap;
}
.head-lang .lang-drop {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 6px;
    min-width: 160px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
    border: 1px solid rgba(0,0,0,0.06);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
    z-index: 1000;
}
.head-lang .lang-drop .lang-arrow {
    position: absolute;
    top: -6px;
    right: 20px;
    width: 12px;
    height: 12px;
    background: #fff;
    border-left: 1px solid rgba(0,0,0,0.06);
    border-top: 1px solid rgba(0,0,0,0.06);
    transform: rotate(45deg);
}
.head-lang .lang:hover .lang-drop {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.head-lang .lang-wrap {
    list-style: none;
    margin: 0;
    padding: 8px 0;
    position: relative;
}
.head-lang .lang-drop li {
    margin: 0;
    padding: 0;
}
.head-lang .lang-drop li a {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    text-decoration: none;
    color: #333;
    font-size: 14px;
    transition: background-color 0.15s;
}
.head-lang .lang-drop li a:hover {
    background-color: #f5f5f5;
}
.head-lang .lang-drop li.lang-active a {
    background-color: #f0f0f0;
    font-weight: 600;
    color: #1a1a1a;
}
.head-lang .lang-drop li span {
    flex-shrink: 0;
}

/* ========== 语言图标（雪碧图） ========== */
.lang-drop li span{background:url(../images/language-all.webp) no-repeat center;width:24px;height:16px;display:inline-flex;margin-right:6px;vertical-align:sub;}
.lang-flex .lang-wrap{width:360px;max-height:400px;overflow-y:auto;position:relative;}
.lang-drop li span.lang-en{background-position:0px 0px;}
.lang-drop li span.lang-fr{background-position:0px -17px;}
.lang-drop li span.lang-de{background-position:0px -34px;}
.lang-drop li span.lang-es{background-position:0px -51px;}
.lang-drop li span.lang-pt{background-position:0px -68px;}
.lang-drop li span.lang-it{background-position:0px -85px;}
.lang-drop li span.lang-ar{background-position:0px -102px;}
.lang-drop li span.lang-ko{background-position:0px -119px;}
.lang-drop li span.lang-ja{background-position:0px -136px;}
.lang-drop li span.lang-ru{background-position:0px -153px;}
.lang-drop li span.lang-nl{background-position:0px -170px;}
.lang-drop li span.lang-cn{background-position:0px -187px;}
.lang-drop li span.lang-tw{background-position:0px -204px;}
.lang-drop li span.lang-ua{background-position:0px -221px;}
.lang-drop li span.lang-fj{background-position:0px -238px;}
.lang-drop li span.lang-my{background-position:0px -255px;}
.lang-drop li span.lang-af{background-position:0px -272px;}
.lang-drop li span.lang-hr{background-position:0px -289px;}
.lang-drop li span.lang-bg{background-position:0px -306px;}
.lang-drop li span.lang-sk{background-position:0px -323px;}
.lang-drop li span.lang-id{background-position:0px -340px;}
.lang-drop li span.lang-no{background-position:0px -357px;}
.lang-drop li span.lang-ee{background-position:0px -374px;}
.lang-drop li span.lang-si{background-position:0px -391px;}
.lang-drop li span.lang-ht{background-position:0px -408px;}
.lang-drop li span.lang-pk{background-position:0px -425px;}
.lang-drop li span.lang-fi{background-position:0px -442px;}
.lang-drop li span.lang-tr{background-position:0px -459px;}
.lang-drop li span.lang-dk{background-position:0px -476px;}
.lang-drop li span.lang-mt{background-position:0px -493px;}
.lang-drop li span.lang-se{background-position:-25px 0px;}
.lang-drop li span.lang-il{background-position:-25px -17px;}
.lang-drop li span.lang-cy{background-position:-25px -34px;}
.lang-drop li span.lang-th{background-position:-25px -51px;}
.lang-drop li span.lang-ro{background-position:-25px -68px;}
.lang-drop li span.lang-lv{background-position:-25px -85px;}
.lang-drop li span.lang-gr{background-position:-25px -102px;}
.lang-drop li span.lang-hu{background-position:-25px -119px;}
.lang-drop li span.lang-vn{background-position:-25px -136px;}
.lang-drop li span.lang-lt{background-position:-25px -153px;}
.lang-drop li span.lang-cz{background-position:-25px -170px;}
.lang-drop li span.lang-ca{background-position:-25px -187px;}
.lang-drop li span.lang-pl{background-position:-25px -204px;}
.lang-drop li span.lang-tlh{background-position:-25px -221px;}
.lang-drop li span.lang-yua{background-position:-25px -238px;}
.lang-drop li span.lang-mww{background-position:-25px -255px;}
.lang-drop li span.lang-otq{background-position:-25px -272px;}
.lang-drop li span.lang-srla{background-position:-25px -289px;}
.lang-drop li span.lang-srcyrl{background-position:-25px -306px;}
.lang-drop li span.lang-sq{background-position:-25px -323px;}
.lang-drop li span.lang-am{background-position:-25px -340px;}
.lang-drop li span.lang-az{background-position:-25px -357px;}
.lang-drop li span.lang-eu{background-position:-25px -374px;}
.lang-drop li span.lang-be{background-position:-25px -391px;}
.lang-drop li span.lang-fa{background-position:-25px -408px;}
.lang-drop li span.lang-fy{background-position:-25px -425px;}
.lang-drop li span.lang-km{background-position:-25px -442px;}
.lang-drop li span.lang-ka{background-position:-25px -459px;}
.lang-drop li span.lang-gu{background-position:-25px -476px;}
.lang-drop li span.lang-ky{background-position:-25px -493px;}
.lang-drop li span.lang-gl{background-position:-50px 0px;}
.lang-drop li span.lang-kn{background-position:-50px -17px;}
.lang-drop li span.lang-co{background-position:-50px -34px;}
.lang-drop li span.lang-ku{background-position:-50px -51px;}
.lang-drop li span.lang-la{background-position:-50px -68px;}
.lang-drop li span.lang-lo{background-position:-50px -85px;}
.lang-drop li span.lang-lb{background-position:-50px -102px;}
.lang-drop li span.lang-mg{background-position:-50px -119px;}
.lang-drop li span.lang-mr{background-position:-50px -136px;}
.lang-drop li span.lang-ml{background-position:-50px -153px;}
.lang-drop li span.lang-mk{background-position:-50px -170px;}
.lang-drop li span.lang-mi{background-position:-50px -187px;}
.lang-drop li span.lang-mn{background-position:-50px -204px;}
.lang-drop li span.lang-ms{background-position:-50px -221px;}
.lang-drop li span.lang-xh{background-position:-50px -238px;}
.lang-drop li span.lang-zu{background-position:-50px -255px;}
.lang-drop li span.lang-ne{background-position:-50px -272px;}
.lang-drop li span.lang-pa{background-position:-50px -289px;}
.lang-drop li span.lang-ny{background-position:-50px -306px;}
.lang-drop li span.lang-sm{background-position:-50px -323px;}
.lang-drop li span.lang-st{background-position:-50px -340px;}
.lang-drop li span.lang-sl{background-position:-50px -357px;}
.lang-drop li span.lang-eo{background-position:-50px -374px;}
.lang-drop li span.lang-sw{background-position:-50px -391px;}
.lang-drop li span.lang-gd{background-position:-50px -408px;}
.lang-drop li span.lang-ceb{background-position:-50px -425px;}
.lang-drop li span.lang-so{background-position:-50px -442px;}
.lang-drop li span.lang-tg{background-position:-50px -459px;}
.lang-drop li span.lang-te{background-position:-50px -476px;}
.lang-drop li span.lang-ta{background-position:-50px -493px;}
.lang-drop li span.lang-haw{background-position:-75px 0px;}
.lang-drop li span.lang-sd{background-position:-75px -17px;}
.lang-drop li span.lang-sn{background-position:-75px -34px;}
.lang-drop li span.lang-hy{background-position:-75px -51px;}
.lang-drop li span.lang-ig{background-position:-75px -68px;}
.lang-drop li span.lang-yi{background-position:-75px -85px;}
.lang-drop li span.lang-su{background-position:-75px -102px;}
.lang-drop li span.lang-jw{background-position:-75px -119px;}
.lang-drop li span.lang-yo{background-position:-75px -136px;}
.lang-drop li span.lang-ha{background-position:-75px -153px;}
.lang-drop li span.lang-ps{background-position:-75px -170px;}
.lang-drop li span.lang-kk{background-position:-75px -187px;}
.lang-drop li span.lang-tl{background-position:-75px -204px;}
.lang-drop li span.lang-tk{background-position:-75px -221px;}
.lang-drop li span.lang-ug{background-position:-75px -238px;}
.lang-drop li span.lang-rw{background-position:-75px -255px;}
.lang-drop li span.lang-tt{background-position:-75px -272px;}
.lang-drop li span.lang-or{background-position:-75px -289px;}
.lang-drop li span.lang-as{background-position:-75px -306px;}
.lang-drop li span.lang-awa{background-position:-75px -323px;}
.lang-drop li span.lang-lij{background-position:-75px -340px;}
.lang-drop li span.lang-ay{background-position:-75px -357px;}
.lang-drop li span.lang-oc{background-position:-75px -374px;}
.lang-drop li span.lang-tpi{background-position:-75px -391px;}
.lang-drop li span.lang-ban{background-position:-75px -408px;}
.lang-drop li span.lang-mai{background-position:-75px -425px;}
.lang-drop li span.lang-bm{background-position:-75px -442px;}
.lang-drop li span.lang-pag{background-position:-75px -459px;}
.lang-drop li span.lang-nso{background-position:-75px -476px;}
.lang-drop li span.lang-bem{background-position:-75px -493px;}
.lang-drop li span.lang-dyu{background-position:-100px 0px;}
.lang-drop li span.lang-fo{background-position:-100px -17px;}
.lang-drop li span.lang-mni{background-position:-100px -34px;}
.lang-drop li span.lang-fon{background-position:-100px -51px;}
.lang-drop li span.lang-gn{background-position:-100px -68px;}
.lang-drop li span.lang-kac{background-position:-100px -85px;}
.lang-drop li span.lang-lus{background-position:-100px -102px;}
.lang-drop li span.lang-crh{background-position:-100px -119px;}
.lang-drop li span.lang-li{background-position:-100px -136px;}
.lang-drop li span.lang-ln{background-position:-100px -153px;}
.lang-drop li span.lang-rn{background-position:-100px -170px;}
.lang-drop li span.lang-luo{background-position:-100px -187px;}
.lang-drop li span.lang-lg{background-position:-100px -204px;}
.lang-drop li span.lang-lmo{background-position:-100px -221px;}
.lang-drop li span.lang-pap{background-position:-100px -238px;}
.lang-drop li span.lang-ak{background-position:-100px -255px;}
.lang-drop li span.lang-sg{background-position:-100px -272px;}
.lang-drop li span.lang-ti{background-position:-100px -289px;}
.lang-drop li span.lang-tum{background-position:-100px -306px;}
.lang-drop li span.lang-sat{background-position:-100px -323px;}
.lang-drop li span.lang-war{background-position:-100px -340px;}
.lang-drop li span.lang-vec{background-position:-100px -357px;}
.lang-drop li span.lang-wo{background-position:-100px -374px;}
.lang-drop li span.lang-szl{background-position:-100px -391px;}
.lang-drop li span.lang-scn{background-position:-100px -408px;}
.lang-drop li span.lang-ace{background-position:-100px -425px;}
.lang-drop li span.lang-ilo{background-position:-100px -442px;}
.lang-drop li span.lang-dz{background-position:-100px -459px;}
.lang-drop li span.lang-kg{background-position:-100px -476px;}
.lang-drop li span.lang-ba{background-position:-100px -493px;}