/* KUOXUAN · v2 — motion, responsive polish, new components
   Loaded after main.css. Keep everything CSS-only & cheap for slow servers. */

/* ============ 1. 导航箭头修复（不再用文字字符，避免基线错位） ============ */
.navlinks a{display:inline-flex;align-items:center;gap:.35em;line-height:1.2}
.has-mega > a::after{
  content:"";width:0;height:0;margin-left:.38em;margin-top:.18em;
  border-left:4px solid transparent;border-right:4px solid transparent;
  border-top:5px solid currentColor;opacity:.55;transition:transform .2s
}
.has-mega:hover > a::after{transform:rotate(180deg);opacity:1}
.navlinks a.plain::after{display:none}

/* ============ 2. 滚动揭示动效（V3：放缓至 1.1s） ============ */
.reveal{opacity:0;transform:translateY(30px);transition:opacity 1.1s cubic-bezier(.22,.61,.36,1),transform 1.1s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}
.reveal-l{opacity:0;transform:translateX(-30px);transition:opacity 1.1s ease,transform 1.1s ease}
.reveal-l.in{opacity:1;transform:none}
.reveal-r{opacity:0;transform:translateX(30px);transition:opacity 1.1s ease,transform 1.1s ease}
.reveal-r.in{opacity:1;transform:none}
.reveal-s{opacity:0;transform:scale(.96);transition:opacity .9s ease,transform .9s ease}
.reveal-s.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal,.reveal-l,.reveal-r,.reveal-s{opacity:1!important;transform:none!important}
}

/* 依次入场（V3：单卡 1.1s，间隔 0.22s，10 卡总时长约 3.3s） */
.stagger > *{opacity:0;transform:translateY(20px)}
.stagger.in > *{animation:rise 1.1s cubic-bezier(.22,.61,.36,1) forwards}
.stagger.in > *:nth-child(1){animation-delay:.05s}
.stagger.in > *:nth-child(2){animation-delay:.27s}
.stagger.in > *:nth-child(3){animation-delay:.49s}
.stagger.in > *:nth-child(4){animation-delay:.71s}
.stagger.in > *:nth-child(5){animation-delay:.93s}
.stagger.in > *:nth-child(6){animation-delay:1.15s}
.stagger.in > *:nth-child(7){animation-delay:1.37s}
.stagger.in > *:nth-child(8){animation-delay:1.59s}
.stagger.in > *:nth-child(9){animation-delay:1.81s}
.stagger.in > *:nth-child(10){animation-delay:2.03s}
.stagger.in > *:nth-child(n+11){animation-delay:2.25s}
@keyframes rise{to{opacity:1;transform:none}}

/* ============ 3. 首屏动态效果（V3：整体 5~7 秒缓速播放） ============ */
.hero-media img{animation:kenburns 30s ease-out forwards}
@keyframes kenburns{from{transform:scale(1.05)}to{transform:scale(1.18)}}
.hero .wrap > *{animation:heroIn 1.6s cubic-bezier(.22,.61,.36,1) both}
.hero .wrap > *:nth-child(2){animation-delay:.9s}
.hero .wrap > *:nth-child(3){animation-delay:1.9s}
.hero .wrap > *:nth-child(4){animation-delay:3.0s}
.hero .wrap > *:nth-child(5){animation-delay:4.1s}
@keyframes heroIn{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}

/* 首屏扫描光带
   ⚠ 必须用 transform 位移，不能用 left：
   animation 动 left 每帧都会触发一次布局计算，Chrome 会把每一帧都记为一次
   layout-shift（实测首页因此累积出 148 条位移事件、CLS 从 0 涨到 0.10）。
   transform 走合成层，既不影响布局也不产生 CLS。
   位移换算：元素宽 38%，原来 left 从 -40% 到 120%（相对 hero 宽），
   换算成相对自身宽度的 translateX 即 -105% → 316%。 */
.hero::after{
  content:"";position:absolute;left:0;top:0;width:38%;height:100%;pointer-events:none;
  background:linear-gradient(100deg,transparent,rgba(242,162,28,.10),transparent);
  will-change:transform;
  animation:sweep 14s linear infinite
}
@keyframes sweep{0%{transform:translateX(-105%)}60%{transform:translateX(316%)}100%{transform:translateX(316%)}}

/* 数字滚动 */
.stat b{display:block;font-size:1.9rem;font-weight:800;line-height:1.1;font-variant-numeric:tabular-nums}
.stat small{font-size:.76rem;color:var(--muted);letter-spacing:.04em}
.hero-badges .stat span{font-size:1.7rem}

/* 向下滚动提示 */
.scrollhint{
  position:absolute;left:50%;bottom:22px;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:6px;
  font-size:.7rem;letter-spacing:.16em;color:rgba(255,255,255,.55);text-transform:uppercase
}
.scrollhint i{display:block;width:1px;height:34px;background:linear-gradient(rgba(255,255,255,.6),transparent);
  animation:pulse 1.8s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.25;transform:scaleY(.6)}50%{opacity:1;transform:scaleY(1)}}

/* ============ 4. 欢迎条 + 设备卡 hover ============ */
.welcome{
  display:grid;grid-template-columns:1fr 1fr;gap:0;align-items:stretch;
  border-radius:var(--radius);overflow:hidden;background:var(--ink);color:#fff
}
.welcome .txt{padding:44px 40px;display:flex;flex-direction:column;justify-content:center}
.welcome .txt h2{color:#fff}
.welcome .txt h2 em{font-style:normal;color:var(--amber)}
.welcome .txt p{color:rgba(255,255,255,.76);margin-bottom:0}
.welcome .pic{position:relative;min-height:320px;overflow:hidden}
.welcome .pic img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.22,.61,.36,1)}
.welcome:hover .pic img{transform:scale(1.07)}
.welcome .pic .cap{
  position:absolute;left:0;right:0;bottom:0;padding:20px;
  background:linear-gradient(transparent,rgba(8,17,28,.92));
  transform:translateY(14px);opacity:.9;transition:.35s
}
.welcome:hover .pic .cap{transform:none;opacity:1}
.welcome .pic .cap b{display:block;font-size:.95rem}
.welcome .pic .cap span{font-size:.8rem;color:rgba(255,255,255,.7)}

.eq-card{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--ink);
  border:1px solid var(--line);min-height:230px}
.eq-card img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;
  transition:transform .7s cubic-bezier(.22,.61,.36,1),filter .5s}
.eq-card:hover img{transform:scale(1.08)}
.eq-card::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,17,28,.05) 35%,rgba(8,17,28,.9))}
.eq-card .t{position:relative;z-index:2;padding:20px;color:#fff;margin-top:auto;min-height:230px;
  display:flex;flex-direction:column;justify-content:flex-end}
.eq-card .t h3{margin:0 0 .25em;font-size:1.05rem}
.eq-card .t p{font-size:.84rem;color:rgba(255,255,255,.78);margin:0;
  max-height:0;overflow:hidden;opacity:0;transition:max-height .4s,opacity .4s,margin .3s}
.eq-card:hover .t p{max-height:120px;opacity:1;margin-top:.5em}
.eq-card .t .no{position:absolute;top:14px;left:18px;font-size:.72rem;letter-spacing:.14em;
  color:var(--amber);font-weight:700}

/* ============ 5. 合作伙伴 logo 墙（循环滚动） ============ */
.marquee{position:relative;overflow:hidden;padding:6px 0;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
          mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee-track{display:flex;gap:52px;width:max-content;animation:slide 38s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.logo-tile{
  flex:0 0 auto;height:52px;display:flex;align-items:center;justify-content:center;
  padding:0 6px;opacity:.88;transition:.3s
}
.logo-tile:hover{opacity:1;transform:scale(1.05)}
.logo-tile img,.logo-tile svg{height:100%;width:auto;display:block}

/* ============ 6. 产品双维度展示 ============ */
.pcard{
  position:relative;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  background:#fff;display:flex;flex-direction:column;transition:.25s
}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.pcard .pic{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--mist)}
.pcard .pic img{width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.22,.61,.36,1)}
.pcard:hover .pic img{transform:scale(1.07)}
.pcard .pic .cnt{position:absolute;right:12px;top:12px;background:rgba(14,27,42,.82);color:#fff;
  font-size:.72rem;font-weight:700;padding:3px 10px;border-radius:999px}
.pcard .pic .go{position:absolute;inset:0;display:grid;place-items:center;
  background:rgba(11,59,111,.55);opacity:0;transition:.3s}
.pcard:hover .pic .go{opacity:1}
.pcard .pic .go span{background:#fff;color:var(--navy);font-weight:700;font-size:.84rem;
  padding:9px 18px;border-radius:999px}
.pcard .b{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.pcard .b h3{margin:0 0 .3em;font-size:1.05rem}
.pcard .b p{font-size:.86rem;color:var(--muted);margin:0 0 .8em}
.pcard .b .meta{margin-top:auto;display:flex;gap:8px;flex-wrap:wrap}
.pcard .b .meta span{font-size:.72rem;background:var(--mist);border-radius:6px;padding:3px 8px;color:var(--muted)}

/* 醒目搜索条 */
.searchhero{
  background:linear-gradient(120deg,var(--ink) 0%,var(--navy) 60%,var(--blue) 100%);
  border-radius:var(--radius);padding:30px 28px;color:#fff;position:relative;overflow:hidden
}
.searchhero::before{content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;
  border-radius:50%;background:rgba(242,162,28,.16);animation:floaty 7s ease-in-out infinite}
.searchhero::after{content:"";position:absolute;left:-40px;bottom:-80px;width:220px;height:220px;
  border-radius:50%;background:rgba(255,255,255,.07);animation:floaty 9s ease-in-out infinite reverse}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-18px)}}
.searchhero .in{position:relative;z-index:2}
.searchhero h2{color:#fff;font-size:1.35rem;margin-bottom:.3em}
.searchhero p{color:rgba(255,255,255,.78);font-size:.92rem;margin-bottom:1em}
.searchbox{display:flex;gap:10px;flex-wrap:wrap}
.searchbox input{
  flex:1;min-width:220px;font:inherit;font-size:1rem;padding:15px 18px;border-radius:999px;
  border:0;box-shadow:0 6px 20px rgba(0,0,0,.18)
}
.searchbox select{font:inherit;font-size:.95rem;padding:15px 16px;border-radius:999px;border:0;min-width:170px}
.searchbox .btn{padding:15px 26px}
.suggest{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px;align-items:center}
.suggest b{font-size:.78rem;color:rgba(255,255,255,.6);font-weight:600;letter-spacing:.08em}
.suggest button{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
  color:#fff;font:inherit;font-size:.8rem;padding:6px 14px;border-radius:999px;cursor:pointer;transition:.2s}
.suggest button:hover{background:var(--amber);color:#3A2600;border-color:transparent}

/* ============ 7. 应用页大气卡片 ============ */
.sol-hero{position:relative;border-radius:var(--radius);overflow:hidden;min-height:340px;
  display:flex;align-items:flex-end;color:#fff;padding:36px;border:1px solid var(--line)}
.sol-hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.sol-hero::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,17,28,.25),rgba(8,17,28,.92))}
.sol-hero .t{position:relative;z-index:2;max-width:60ch}
.sol-card{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  background:#fff;display:flex;flex-direction:column;min-height:100%}
.sol-card .pic{position:relative;aspect-ratio:1/1;overflow:hidden}
.sol-card .pic img{width:100%;height:100%;object-fit:cover;transition:transform .7s cubic-bezier(.22,.61,.36,1)}
.sol-card:hover .pic img{transform:scale(1.09)}
.sol-card .pic::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 45%,rgba(8,17,28,.72))}
.sol-card .pic .badge{position:absolute;left:14px;top:14px;z-index:2;background:rgba(255,255,255,.92);
  color:var(--navy);font-size:.72rem;font-weight:700;padding:4px 11px;border-radius:999px}
.sol-card .pic h3{position:absolute;left:16px;right:16px;bottom:14px;z-index:2;color:#fff;margin:0;font-size:1.05rem}
.sol-card .b{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.sol-card .b p{font-size:.86rem;color:var(--muted);margin:0 0 .8em}
.sol-card .b ul{margin:0 0 1em;padding-left:1.05em;font-size:.82rem;color:var(--muted)}
.sol-card .b a.more{margin-top:auto;font-weight:600;color:var(--blue);font-size:.88rem}

/* ============ 8. 技术页：时间轴 / 新材料发布 ============ */
.road{position:relative;padding-left:26px}
.road::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(var(--blue),var(--amber))}
.road .it{position:relative;padding:0 0 26px}
.road .it::before{content:"";position:absolute;left:-25px;top:6px;width:12px;height:12px;border-radius:50%;
  background:#fff;border:3px solid var(--blue)}
.road .it.hot::before{border-color:var(--amber);box-shadow:0 0 0 5px rgba(242,162,28,.18)}
.road .it b{display:block;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--blue)}
.road .it h4{margin:.2em 0 .3em;font-size:1.02rem}
.road .it p{margin:0;font-size:.88rem;color:var(--muted)}

.proc{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  min-height:260px;display:flex;align-items:flex-end}
.proc img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  transition:transform .8s cubic-bezier(.22,.61,.36,1)}
.proc:hover img{transform:scale(1.08)}
.proc::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,17,28,0) 30%,rgba(8,17,28,.88))}
.proc .t{position:relative;z-index:2;padding:22px;color:#fff;width:100%}
.proc .t h3{margin:0 0 .25em;font-size:1.08rem}
.proc .t p{font-size:.85rem;color:rgba(255,255,255,.8);margin:0}
.proc .t .no{position:absolute;right:18px;top:-46px;font-size:2.2rem;font-weight:800;color:rgba(255,255,255,.28)}

.qcgrid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.qcfig{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.qcfig .pic{aspect-ratio:1/1;overflow:hidden;background:var(--mist)}
.qcfig .pic img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.qcfig:hover .pic img{transform:scale(1.08)}
.qcfig figcaption{padding:12px 14px;font-size:.84rem;font-weight:600}
.qcfig figcaption small{display:block;font-weight:400;color:var(--muted);font-size:.76rem;margin-top:.2em}

/* ============ 9. 关于页 ============ */
.milestone{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:8px}
.milestone div{border-left:3px solid var(--blue);padding:2px 0 2px 14px}
.milestone b{display:block;font-size:1.35rem;font-weight:800;color:var(--navy)}
.milestone span{font-size:.82rem;color:var(--muted)}
.partner-cta{
  background:linear-gradient(120deg,var(--ink),var(--navy));color:#fff;border-radius:var(--radius);
  padding:40px;display:grid;grid-template-columns:1.2fr 1fr;gap:30px;align-items:center
}
.partner-cta h2{color:#fff}
.partner-cta p{color:rgba(255,255,255,.78)}
.partner-cta ul{color:rgba(255,255,255,.86);font-size:.92rem}
.partner-cta .btn{background:var(--amber);color:#3A2600}

/* ============ 10. 资源中心（下载+FAQ 合并） ============ */
.tabbar{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1px solid var(--line);margin-bottom:26px}
.tabbar button{
  border:0;background:transparent;font:inherit;font-weight:600;font-size:.95rem;color:var(--muted);
  padding:12px 18px;border-radius:10px 10px 0 0;cursor:pointer;position:relative
}
.tabbar button.on{color:var(--navy);background:var(--mist)}
.tabbar button.on::after{content:"";position:absolute;left:14px;right:14px;bottom:-1px;height:2px;background:var(--blue)}
.tabpane{display:none}
.tabpane.on{display:block;animation:fadeUp .45s ease both}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

.acc{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px;background:#fff;overflow:hidden}
.acc .q{padding:17px 20px;cursor:pointer;font-weight:600;display:flex;justify-content:space-between;gap:14px;align-items:center}
.acc .q::after{content:"+";color:var(--blue);font-size:1.35rem;font-weight:400;transition:transform .3s}
.acc.open .q::after{transform:rotate(45deg)}
.acc .a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 20px;color:var(--muted);font-size:.93rem}
.acc.open .a{max-height:600px;padding:0 20px 18px;border-top:1px solid var(--line);padding-top:14px}

/* ============ 11. 防爬取联系信息 ============ */
.obf{display:inline-flex;align-items:center;gap:8px}
.obf svg{height:1.15em;width:auto;vertical-align:-.2em}
.obf .mask{cursor:pointer;border:1px dashed var(--line-2);border-radius:6px;padding:2px 10px;
  font-size:.86rem;color:var(--muted);background:var(--mist)}
.obf .mask:hover{border-color:var(--blue);color:var(--blue)}
.obf-note{font-size:.76rem;color:var(--muted);margin-top:6px}

/* ============ 12. 后台管理 ============ */
.admin{background:var(--mist);min-height:100vh}
.admin-wrap{max-width:1180px;margin:0 auto;padding:20px}
.adm-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:18px}
.adm-card h3{margin:0 0 .4em;font-size:1.05rem}
.adm-row{display:grid;grid-template-columns:180px 1fr;gap:14px;padding:10px 0;border-bottom:1px dashed var(--line);align-items:start}
.adm-row label{font-size:.86rem;color:var(--muted);font-weight:600;padding-top:8px}
.adm-row input[type=text],.adm-row textarea,.adm-row select{
  font:inherit;font-size:.92rem;padding:9px 12px;border:1px solid var(--line-2);border-radius:8px;width:100%
}
.adm-row textarea{min-height:70px;resize:vertical}
.adm-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:18px}
.adm-tabs button{border:1px solid var(--line-2);background:#fff;font:inherit;font-size:.88rem;font-weight:600;
  padding:9px 16px;border-radius:999px;cursor:pointer;color:var(--muted)}
.adm-tabs button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.adm-thumb{width:96px;height:64px;object-fit:cover;border-radius:8px;border:1px solid var(--line)}
.adm-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.adm-status{font-size:.86rem;font-weight:600;color:var(--ok)}
.adm-login{max-width:380px;margin:12vh auto;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:32px}
.adm-login input{width:100%;font:inherit;padding:12px 14px;border:1px solid var(--line-2);
  border-radius:8px;margin-bottom:12px}
.slot{border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:12px;background:#fff}
.slot .hd{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}
.slot .hd b{font-size:.95rem}

/* ============ 13. 移动端竖屏适配 ============ */
.onlymob{display:none}
@media (max-width:1080px){
  .welcome{grid-template-columns:1fr}
  .welcome .pic{min-height:240px}
  .qcgrid{grid-template-columns:repeat(3,1fr)}
  .milestone{grid-template-columns:repeat(2,1fr)}
  .partner-cta{grid-template-columns:1fr;padding:30px}
  .road{padding-left:22px}
}
@media (max-width:760px){
  html{font-size:15px}
  body{overflow-x:hidden}
  /* header：logo 缩小 + 语言选择器收紧 + 样品按钮换成短版，彻底消除横向溢出 */
  .onlymob{display:inline-flex}
  .nav-cta .btn.amber.sm:not(.onlymob){display:none}
  .nav{gap:8px;height:62px}
  .brand img{height:38px !important}
  .langbtn{padding:5px 9px;font-size:.75rem}
  .langsel{gap:6px}
  .burger{width:32px;height:30px;font-size:.85rem}
  .onlymob{padding:9px 12px;font-size:.78rem}
  .hero .wrap{padding:76px 16px 68px}
  .hero h1{font-size:clamp(1.7rem,7.4vw,2.4rem)}
  .hero .lead{font-size:1rem}
  .hero-badges{gap:14px 20px}
  .hero-badges .stat span,.stat b{font-size:1.35rem}
  .scrollhint{display:none}
  .searchhero{padding:22px 18px}
  .searchbox input,.searchbox select{min-width:100%;width:100%}
  .searchbox .btn{width:100%;justify-content:center}
  .qcgrid{grid-template-columns:repeat(2,1fr)}
  .eq-card,.proc{min-height:200px}
  .topbar .r{gap:10px;font-size:.75rem}
  .topbar .wrap{justify-content:center;text-align:center}
  .floating a{width:46px;height:46px;font-size:1.05rem}
  .floating{right:12px;bottom:12px}
  .adm-row{grid-template-columns:1fr}
  .adm-row label{padding-top:0}
  .sol-hero{min-height:260px;padding:22px}
  .marquee-track{gap:34px}
  .logo-tile{height:40px}
  table.spec{min-width:640px}
}

@media (max-width:420px){
  .milestone{grid-template-columns:1fr}
  .qcgrid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%;justify-content:center}
  .onlymob{display:none}
  .langbtn{padding:4px 8px;font-size:.7rem}
  .langcur span{max-width:74px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
}

/* 320px 极窄屏（Galaxy Fold 外屏、iPhone SE 一代）。
   760 档把间距压到 8px 之后，俄语/印尼语/波兰语/荷兰语的导航三件套
   （logo 128 + 语言按钮 + 汉堡）仍超过 .wrap 的 272px 可用宽度，
   汉堡被挤到 x=317（几乎贴边），页面被撑宽 2–22px。
   这一档只压间距和 logo 高度，不隐藏任何功能，汉堡按钮保留原可点面积。
   ⚠️ 必须在源码里排在 420 档之后：420 档会重设 .langbtn 与 .langcur span 的最大宽度，
      写在前头会被整段覆盖掉（2026-10-23 第一版就踩了这个，320px 的数字一点没变）。 */
@media (max-width:360px){
  .nav{gap:5px}
  .brand{gap:6px}
  .brand img{height:31px !important}
  .nav-cta{gap:4px;margin-left:0}
  .langbtn{padding:4px 7px;font-size:.7rem;gap:5px}
  .langcur span{max-width:34px}
  /* 波兰语/俄语的按钮文案（"Otwórz przewodnik po…"）带 white-space:nowrap，
     天然宽度 303px > 可用 272px，会把页面撑宽 7–14px（实测 scrollX 真的能滚）。
     允许换行 + 卡住上限，按钮变成两行总比整页横滚好。 */
  .btn{max-width:100%;white-space:normal}
}

/* ============ 14. V3：深色容器内 outline 按钮可见性修复 ============ */
.welcome .btn.outline,.dark .btn.outline,.partner-cta .btn.outline,.eq-card ~ .btn.outline{
  color:#fff;border-color:rgba(255,255,255,.55)
}
.welcome .btn.outline:hover,.dark .btn.outline:hover,.partner-cta .btn.outline:hover{
  background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.8)
}

/* ============ 15. V3：研发路线图滚动动效（3~5 秒依次点亮） ============ */
.road.road-reveal .it{opacity:0;transform:translateX(-22px)}
.road.road-reveal.in .it{animation:roadIn 1.15s cubic-bezier(.22,.61,.36,1) forwards}
.road.road-reveal.in .it:nth-child(1){animation-delay:.25s}
.road.road-reveal.in .it:nth-child(2){animation-delay:1.05s}
.road.road-reveal.in .it:nth-child(3){animation-delay:1.85s}
.road.road-reveal.in .it:nth-child(4){animation-delay:2.65s}
.road.road-reveal.in .it:nth-child(5){animation-delay:3.45s}
@keyframes roadIn{to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  .road.road-reveal .it{opacity:1!important;transform:none!important;animation:none!important}
}

/* ============ 16. V3：联系页谷歌地图 ============ */
.mapwrap{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}
.mapwrap iframe{display:block;width:100%;height:420px;border:0;filter:saturate(.92)}
@media (max-width:760px){.mapwrap iframe{height:300px}}