.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: background var(--transition), box-shadow var(--transition);
}

.header--transparent {
  background: transparent;
}

.header--solid {
  background: var(--color-primary);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.header--light {
  background: var(--color-bg-warm);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

/* 首页：透明 → 滚动后白底 */
.header--home {
  background: transparent;
  box-shadow: none;
}

.header--home.header--scrolled {
  background: var(--color-bg);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.header--home .nav-item > a {
  color: var(--color-text-white);
  transition: color var(--transition);
}

.header--home .nav-item.active > a,
.header--home .nav-item > a:hover {
  color: var(--color-accent-light);
}

.header--home.header--scrolled .nav-item > a {
  color: var(--color-text);
}

.header--home.header--scrolled .nav-item.active > a,
.header--home.header--scrolled .nav-item > a:hover {
  color: var(--color-title-gold);
}

.header--home .header__menu-btn span {
  background: var(--color-text-white);
}

.header--home.header--scrolled .header__menu-btn span {
  background: var(--color-text);
}

.header--home .nav-item__dropdown {
  background: rgba(45, 45, 45, 0.95);
}

.header--home.header--scrolled .nav-item__dropdown {
  background: var(--color-bg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header--home.header--scrolled .nav-item__dropdown a {
  color: var(--color-text);
  border-bottom-color: var(--color-border);
}

.header--home.header--scrolled .nav-item__dropdown a:hover {
  background: var(--color-bg-gray);
  color: var(--color-title-gold);
}

.header--home .header__nav {
  flex: 1;
  justify-content: center;
}

.header--home .header__logo-light {
  display: block;
}

.header--home .header__logo-dark {
  display: none;
}

.header--home.header--scrolled .header__logo-light {
  display: none;
}

.header--home.header--scrolled .header__logo-dark {
  display: block;
}

/* 内页：透明头部叠在 banner 上，滚动后白底 */
.header--inner {
  background: transparent;
  box-shadow: none;
}

.header--inner.header--scrolled {
  background: var(--color-bg);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.header--inner .nav-item > a {
  color: var(--color-text-white);
  transition: color var(--transition);
}

.header--inner .nav-item.active > a,
.header--inner .nav-item > a:hover {
  color: var(--color-accent-light);
}

.header--inner.header--scrolled .nav-item > a {
  color: var(--color-text);
}

.header--inner.header--scrolled .nav-item.active > a,
.header--inner.header--scrolled .nav-item > a:hover {
  color: var(--color-title-gold);
}

.header--inner .header__menu-btn span {
  background: var(--color-text-white);
}

.header--inner.header--scrolled .header__menu-btn span {
  background: var(--color-text);
}

.header--inner .nav-item__dropdown {
  background: rgba(45, 45, 45, 0.95);
}

.header--inner.header--scrolled .nav-item__dropdown {
  background: var(--color-bg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header--inner.header--scrolled .nav-item__dropdown a {
  color: var(--color-text);
  border-bottom-color: var(--color-border);
}

.header--inner.header--scrolled .nav-item__dropdown a:hover {
  background: var(--color-bg-gray);
  color: var(--color-title-gold);
}

.header--inner .header__nav {
  flex: 1;
  justify-content: center;
}

.header--inner .header__logo-light {
  display: block;
}

.header--inner .header__logo-dark {
  display: none;
}

.header--inner.header--scrolled .header__logo-light {
  display: none;
}

.header--inner.header--scrolled .header__logo-dark {
  display: block;
}

.header__badge {
  flex-shrink: 0;
  margin-left: 16px;
}

.header__badge img {
  height: 52px;
  width: auto;
  display: block;
}

.header--light .nav-item > a {
  color: var(--color-text);
}

.header--light .nav-item.active > a,
.header--light .nav-item > a:hover {
  color: var(--color-title-gold);
}

.header--light .header__lang {
  color: var(--color-text);
}

.header--light .header__menu-btn span {
  background: var(--color-text);
}

.header--light .nav-item__dropdown {
  background: var(--color-bg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header--light .nav-item__dropdown a {
  color: var(--color-text);
  border-bottom-color: var(--color-border);
}

.header--light .nav-item__dropdown a:hover {
  background: var(--color-bg-gray);
  color: var(--color-title-gold);
}

.header__inner {
  max-width: var(--content-width);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

.header__logo img {
  height: 70px;
  width: auto;
}

.header__logo-light,
.header__logo-dark {
  height: 48px;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-item {
  position: relative;
}

.nav-item > a {
  display: block;
  padding: 0 22px;
  height: var(--header-height);
  line-height: var(--header-height);
  color: var(--color-text-white);
  font-size: 15px;
  letter-spacing: 1px;
  transition: color var(--transition), background var(--transition);
}

.header--solid .nav-item > a:hover,
.header--transparent .nav-item > a:hover {
  color: var(--color-accent);
}

.nav-item.active > a {
  color: var(--color-accent);
}

.nav-item__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 160px;
  background: var(--color-primary-dark);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
  box-shadow: var(--shadow);
}

.nav-item:hover .nav-item__dropdown {
  opacity: 1;
  visibility: visible;
}

.nav-item__dropdown a {
  display: block;
  padding: 12px 24px;
  color: var(--color-text-white);
  font-size: 14px;
  white-space: nowrap;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-item__dropdown a:last-child {
  border-bottom: none;
}

.nav-item__dropdown a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-accent);
}

.header__lang {
  color: var(--color-text-white);
  font-size: 14px;
  margin-left: 20px;
  cursor: pointer;
}

.header__menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 30px;
  height: 30px;
  padding: 0;
}

.header__menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text-white);
  transition: transform var(--transition), opacity var(--transition);
}

.header__menu-btn.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.header__menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.header__menu-btn.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-primary-dark);
  z-index: 999;
  overflow-y: auto;
  padding: 20px;
  transform: translateX(100%);
  transition: transform var(--transition);
}

.mobile-nav.active {
  transform: translateX(0);
}

.mobile-nav__item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-nav__item > a,
.mobile-nav__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  color: var(--color-text-white);
  font-size: 16px;
  width: 100%;
  text-align: left;
}

.mobile-nav__toggle::after {
  content: "+";
  font-size: 20px;
  transition: transform var(--transition);
}

.mobile-nav__item.open .mobile-nav__toggle::after {
  transform: rotate(45deg);
}

.mobile-nav__sub {
  display: none;
  padding-left: 16px;
  padding-bottom: 10px;
}

.mobile-nav__item.open .mobile-nav__sub {
  display: block;
}

.mobile-nav__sub a {
  display: block;
  padding: 10px 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
}

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


@media screen and (max-width:568px){
	.home-block__image,.design-split__image{width:100% !important}
}