.header { background-color: #0a0e27; padding: 0 20px; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3); }
.header .header-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 60px; }
.header .header-logo { display: flex; align-items: center; }
.header .header-logo-link { display: flex; align-items: center; gap: 10px; }
.header .header-logo-icon { width: 36px; height: 36px; }
.header .header-logo-text { font-size: 17px; font-weight: 700; color: #ffffff; letter-spacing: -0.3px; }
.header .header-logo-text-accent { color: #1559ed; }
.header .header-nav { display: none; position: absolute; top: 60px; left: 0; right: 0; background-color: #0a0e27; border-bottom: 1px solid rgba(255, 255, 255, 0.08); padding: 16px 20px; }
.header .header-nav-list { display: flex; flex-direction: column; gap: 0; }
.header .header-nav-item { position: relative; }
.header .header-nav-link { display: block; font-size: 15px; font-weight: 500; color: rgba(255, 255, 255, 0.8); padding: 10px 0; transition: color 0.3s ease; }
.header .header-nav-link:hover { color: #1559ed; }
.header .header-nav-link-active { color: #1559ed; }
.header .header-dropdown-trigger { display: flex; align-items: center; gap: 5px; cursor: pointer; }
.header .header-dropdown-arrow { width: 12px; height: 12px; transition: transform 0.3s ease; }
.header .header-dropdown-arrow-open { transform: rotate(180deg); }
.header .header-dropdown { display: none; padding-left: 16px; }
.header .header-dropdown-open { display: block; }
.header .header-dropdown-link { display: block; font-size: 14px; font-weight: 400; color: rgba(255, 255, 255, 0.65); padding: 8px 0; transition: color 0.3s ease; }
.header .header-dropdown-link:hover { color: #1559ed; }
.header .header-menu-toggle { display: flex; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.header .header-menu-toggle-bar { display: block; width: 22px; height: 2px; background-color: #ffffff; border-radius: 1px; transition: transform 0.3s ease, opacity 0.3s ease; }
.header .header-nav-open { display: block; }
@media (min-width: 768px) {
  .header .header-inner { height: 64px; }
  .header .header-nav { display: flex; position: static; background-color: transparent; border-bottom: none; padding: 0; }
  .header .header-nav-list { flex-direction: row; align-items: center; gap: 32px; }
  .header .header-nav-link { padding: 0; }
  .header .header-menu-toggle { display: none; }
  .header .header-dropdown { display: none; position: absolute; top: 100%; left: -16px; background-color: #0f1629; border: 1px solid rgba(255, 255, 255, 0.08); border-radius: 8px; padding: 8px 0; min-width: 220px; box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5); margin-top: 16px; }
  .header .header-dropdown-open { display: block; }
  .header .header-dropdown-link { padding: 10px 20px; font-size: 14px; }
  .header .header-logo-text { font-size: 19px; }
}