/* ── NAVBAR ── */
.kg-nav {
  background:rgba(255,255,255,.96); backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border); padding:0 2.5rem;
  display:flex; align-items:center; justify-content:space-between;
  height:68px; position:sticky; top:0; z-index:1000;
}
.kg-nav.scrolled { box-shadow:0 2px 20px rgba(58,82,176,.08); }

.nav-logo { display:flex; align-items:center; cursor:pointer; }
.nav-logo-img { height:44px; width:auto; display:block; }

.nav-links { display:flex; align-items:center; }
.nav-item {
  position:relative; padding:0 14px; height:68px;
  display:flex; align-items:center;
  font-size:13.5px; font-weight:600; color:var(--mid);
  cursor:pointer; border-bottom:2.5px solid transparent;
  transition:color .18s, border-color .18s; white-space:nowrap; user-select:none;
}
.nav-item:hover, .nav-item.active { color:var(--or1); border-bottom-color:var(--or1); }
.nav-item:focus-visible { outline:2px solid var(--or2); outline-offset:-6px; border-radius:6px; }
.nav-chevron { font-size:9px; margin-left:5px; opacity:.6; transition:transform .2s; display:inline-block; }
.nav-item:hover .nav-chevron, .nav-item:focus-within .nav-chevron { transform:rotate(180deg); }

.nav-dropdown {
  position:absolute; top:100%; left:0; margin-top:4px;
  background:#fff; border:1px solid var(--border);
  border-radius:12px; padding:8px 0; min-width:205px;
  display:none; box-shadow:0 12px 36px rgba(58,82,176,.12); z-index:1001;
}
/* transparent bridge over the gap so the dropdown doesn't close mid-hover */
.nav-dropdown::before { content:''; position:absolute; top:-6px; left:0; right:0; height:6px; }
.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown { display:block; animation:fadeIn .15s ease; }
.nav-dd-item {
  display:block; padding:10px 18px; font-size:13px; font-weight:500;
  color:var(--mid); cursor:pointer; transition:background .12s,color .12s;
}
.nav-dd-item:hover { background:var(--or5); color:var(--or1); }

.nav-right { display:flex; align-items:center; gap:10px; }
.lang-btn {
  font-size:12px; font-weight:600; color:var(--muted);
  padding:5px 10px; border:1px solid var(--border); border-radius:6px;
  cursor:pointer; background:#fff; transition:all .15s;
}
.lang-btn:hover, .lang-btn.active { border-color:var(--or2); color:var(--or1); background:var(--or5); }

/* language switcher — single globe dropdown (desktop) */
.nav-lang {
  position:relative; display:flex; align-items:center; gap:6px;
  font-size:12.5px; font-weight:600; color:var(--mid);
  background:#fff; border:1px solid var(--border); border-radius:8px;
  padding:7px 11px; cursor:pointer; transition:all .15s; white-space:nowrap; user-select:none;
}
.nav-lang:hover, .nav-lang:focus-within { border-color:var(--or2); color:var(--or1); background:var(--or5); }
.nav-lang:focus-visible { outline:2px solid var(--or2); outline-offset:2px; }
.nav-lang-globe { width:15px; height:15px; flex-shrink:0; }
.nav-lang .nav-chevron { margin-left:1px; }
.nav-lang:hover .nav-chevron, .nav-lang:focus-within .nav-chevron { transform:rotate(180deg); }
.nav-lang-menu {
  position:absolute; top:calc(100% + 6px); right:0;
  background:#fff; border:1px solid var(--border); border-radius:10px;
  padding:6px; min-width:150px; display:none; flex-direction:column; gap:3px;
  box-shadow:0 12px 36px rgba(58,82,176,.12); z-index:1001;
}
.nav-lang-menu::before { content:''; position:absolute; top:-6px; left:0; right:0; height:6px; }
.nav-lang:hover .nav-lang-menu, .nav-lang:focus-within .nav-lang-menu { display:flex; animation:fadeIn .15s ease; }
.nav-lang-menu .lang-btn {
  border:none; background:none; border-radius:6px; width:100%; text-align:left;
  padding:8px 12px; font-size:13px; font-weight:600; color:var(--mid);
}
.nav-lang-menu .lang-btn:hover, .nav-lang-menu .lang-btn.active { background:var(--or5); color:var(--or1); }

.nav-cta {
  display:inline-flex; align-items:center; text-decoration:none;
  font-size:13px; font-weight:700; background:var(--or1); color:#fff;
  padding:9px 20px; border-radius:9px; border:none; cursor:pointer; transition:all .18s;
}
.nav-cta:hover { background:#2d4299; transform:translateY(-1px); box-shadow:0 4px 16px rgba(58,82,176,.3); }

/* ── FOOTER ── */
.kg-footer { background:var(--dark); padding:60px 2.5rem 32px; }
.footer-inner { max-width:1240px; margin:0 auto; }
.footer-grid { display:grid; grid-template-columns:280px 1fr 1fr 1fr; gap:48px; margin-bottom:48px; }
.footer-logo-name { font-size:22px; font-weight:800; color:var(--or2); margin-bottom:4px; }
.footer-logo-tag { font-size:10px; color:var(--or3); letter-spacing:2px; text-transform:uppercase; font-weight:600; margin-bottom:16px; }
.footer-brand-desc { font-size:13px; color:rgba(255,255,255,.4); line-height:1.75; }
.footer-socials { display:flex; gap:10px; margin-top:20px; }
.social-btn {
  width:34px; height:34px; border-radius:8px; border:1px solid rgba(255,255,255,.1);
  display:flex; align-items:center; justify-content:center;
  cursor:pointer; font-size:13px; color:rgba(255,255,255,.5); transition:all .15s;
}
.social-btn:hover { border-color:var(--or3); color:var(--or3); background:rgba(58,82,176,.12); }
.footer-col h4 { font-size:11px; font-weight:700; letter-spacing:1.5px; color:rgba(255,255,255,.28); text-transform:uppercase; margin-bottom:18px; }
.footer-col a { display:block; font-size:13.5px; font-weight:500; color:rgba(255,255,255,.48); margin-bottom:11px; transition:color .15s; }
.footer-col a:hover { color:var(--or3); }
.footer-bottom { border-top:1px solid rgba(255,255,255,.07); padding-top:24px; display:flex; justify-content:space-between; align-items:center; }
.footer-copy { font-size:12px; color:rgba(255,255,255,.24); }
.footer-langs { display:flex; gap:8px; }
.fl { font-size:12px; font-weight:600; color:rgba(255,255,255,.36); padding:4px 10px; border-radius:5px; border:1px solid rgba(255,255,255,.1); cursor:pointer; transition:all .15s; }
.fl:hover, .fl.active { color:var(--or3); border-color:rgba(58,82,176,.4); }

/* ── MOBILE NAV ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  border-radius: 8px;
  transition: background .15s;
}
.nav-hamburger:hover { background: var(--or5); }
.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  position: fixed;
  top: 68px; left: 0; right: 0; bottom: 0;
  background: #fff;
  overflow-y: auto;
  z-index: 998;
  padding: 8px 1.25rem 40px;
  border-top: 1px solid var(--border);
}
.mobile-menu.open { display: block; animation: fadeIn .18s ease; }

.mm-section { border-bottom: 1px solid var(--border); }
.mm-section-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 15px 4px;
  font-size: 15px; font-weight: 600; color: var(--dark);
  cursor: pointer; user-select: none;
  background: none; border: none; width: 100%; text-align: left;
  font-family: var(--font);
}
.mm-section-header a {
  display: block; width: 100%;
  font-size: 15px; font-weight: 600; color: var(--dark);
}
.mm-chevron { font-size: 10px; color: var(--muted); transition: transform .2s; flex-shrink: 0; }
.mm-section.open .mm-chevron { transform: rotate(180deg); }
.mm-sub {
  display: none;
  padding: 0 0 12px 12px;
}
.mm-section.open .mm-sub { display: block; }
.mm-sub a {
  display: block; padding: 10px 4px;
  font-size: 14px; color: var(--mid); font-weight: 500;
  border-bottom: 1px solid var(--or5); transition: color .12s;
}
.mm-sub a:last-child { border-bottom: none; }
.mm-sub a:hover { color: var(--or1); }
.mm-bottom {
  padding: 20px 4px 0;
  display: flex; flex-direction: column; gap: 10px;
}
.mm-langs { display: flex; gap: 8px; }
.mm-cta-btn {
  display: block; text-align: center; width: 100%; box-sizing: border-box; text-decoration: none;
  font-size: 14px; font-weight: 700; background: var(--or1); color: #fff;
  padding: 13px 20px; border-radius: 10px; border: none;
  font-family: var(--font); cursor: pointer; transition: background .18s;
}
.mm-cta-btn:hover { background: #2d4299; }

@media (max-width: 768px) {
  .nav-links { display: none !important; }
  .nav-right { display: none !important; }
  .nav-hamburger { display: flex; }
  .kg-nav { padding: 0 1.25rem; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .kg-footer { padding: 40px 1.25rem 28px; }
}

/* 无障碍：跳转到主内容链接 —— 默认移出视口，键盘 Tab 聚焦时滑入 */
.skip-link {
  position:fixed; top:8px; left:8px; z-index:1200;
  background:var(--or1); color:#fff; font-size:14px; font-weight:700;
  padding:10px 18px; border-radius:8px; text-decoration:none;
  transform:translateY(-150%); transition:transform .2s;
  box-shadow:0 4px 16px rgba(58,82,176,.4);
}
.skip-link:focus { transform:translateY(0); outline:2px solid #fff; outline-offset:2px; }