/* ── Header ───────────────────────────────────────────────────────────── */
.head{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.82);
  backdrop-filter:saturate(1.8) blur(14px);border-bottom:1px solid transparent;
  transition:border-color .2s ease}
.head.scrolled{border-bottom-color:var(--line)}
.head .wrap{display:flex;align-items:center;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:11px;font-weight:600;letter-spacing:-.012em;font-size:16.5px}
.brand img{width:30px;height:30px;display:block;flex:0 0 auto}
.head-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;
  font-size:11.5px;font-weight:600;letter-spacing:.03em}
.lang button{border:0;background:none;padding:7px 12px;cursor:pointer;color:var(--ink-40);font:inherit}
.lang button[aria-pressed="true"]{background:var(--navy);color:#fff}
.btn{display:inline-flex;align-items:center;justify-content:center;
  background:var(--navy);color:#fff;border:0;border-radius:10px;
  padding:14px 26px;font:inherit;font-size:16px;font-weight:550;cursor:pointer;
  transition:background .18s ease, transform .18s ease}
.btn:hover{background:var(--navy-2);transform:translateY(-1px)}
.btn-sm{padding:9px 17px;font-size:14.5px;border-radius:9px}
.btn-ghost{background:transparent;color:var(--navy);border:1.5px solid var(--line)}
.btn-ghost:hover{background:var(--tint);border-color:var(--ink-25)}