/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: var(--trans);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(26, 15, 6, 0.96);
  backdrop-filter: blur(20px);
  box-shadow: 0 2px 30px rgba(0,0,0,.3);
}

.navbar__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* logo */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.navbar__logo-img {
  height: 42px;
  width: auto;
  object-fit: contain;
  display: block;
  filter: url(#remove-white);
}

.navbar__logo-text {
  line-height: 1.15;
  text-align: center;
}

.navbar__logo-text .brand {
  display: block;
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--white);
  letter-spacing: .04em;
}

.navbar__logo-text .tagline {
  display: block;
  font-size: .65rem;
  color: rgba(255,255,255,.55);
  letter-spacing: .1em;
  text-transform: uppercase;
}

/* nav 链接 */
.navbar__nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-item {
  position: relative;
}

.nav-item > a {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  font-size: .92rem;
  font-weight: 500;
  color: rgba(255,255,255,.85);
  border-radius: var(--radius-sm);
  transition: var(--trans-fast);
  white-space: nowrap;
}

.nav-item > a:hover,
.nav-item > a.active {
  color: var(--white);
  background: rgba(255,255,255,.1);
}

.nav-item > a::after {
  content: '';
  display: block;
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: calc(100% - 32px);
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: transform .28s ease;
}

.nav-item > a:hover::after,
.nav-item > a.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* 下拉菜单 */
.nav-item.has-dropdown:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }

.dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 200px;
  background: var(--dark-2);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
  border: 1px solid rgba(255,255,255,.08);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transition: var(--trans);
  white-space: nowrap;
}

.dropdown::before {
  content: '';
  position: absolute;
  top: -6px; left: 50%;
  transform: translateX(-50%);
  width: 12px; height: 12px;
  background: var(--dark-2);
  border-top: 1px solid rgba(255,255,255,.08);
  border-left: 1px solid rgba(255,255,255,.08);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  transform: translateX(-50%) rotate(45deg);
}

.dropdown a {
  display: block;
  padding: 9px 16px;
  font-size: .88rem;
  color: rgba(255,255,255,.75);
  border-radius: var(--radius-sm);
  transition: var(--trans-fast);
}

.dropdown a:hover {
  color: var(--white);
  background: rgba(255,255,255,.08);
}

/* 右侧操作 */
.navbar__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.navbar__actions .btn--primary {
  padding: 9px 22px;
  font-size: .9rem;
}

.lang-btn {
  padding: 7px 14px;
  font-size: .85rem;
  font-weight: 600;
  color: rgba(255,255,255,.7);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 20px;
  transition: var(--trans-fast);
}

.lang-btn:hover {
  color: var(--white);
  border-color: rgba(255,255,255,.5);
}

/* 汉堡 */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.navbar__hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 1px;
  transition: var(--trans);
}

/* 移动端菜单抽屉 */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--dark);
  flex-direction: column;
  padding: 100px 32px 40px;
  transform: translateX(100%);
  transition: transform .35s cubic-bezier(.4,0,.2,1);
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu a {
  display: block;
  padding: 16px 0;
  font-size: 1.2rem;
  font-weight: 600;
  color: rgba(255,255,255,.85);
  border-bottom: 1px solid rgba(255,255,255,.07);
  transition: var(--trans-fast);
}

.mobile-menu a:hover { color: var(--accent); }

/* 响应式 */
@media (max-width: 1024px) {
  .navbar__nav { display: none; }
  .navbar__actions .btn--primary { display: none; }
  .lang-btn { display: none; }
  .navbar__hamburger { display: flex; }
  .mobile-menu { display: flex; }
}