/* ============================================
   导航栏样式 - 深色透明悬浮 + 线性高亮
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1200;
  padding: 16px 0;
  background: linear-gradient(180deg, rgba(10,10,15,0.92) 0%, rgba(10,10,15,0.6) 60%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

@media (min-width: 1024px) {
  .navbar-container { padding: 0 20px; }
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  text-decoration: none;
  letter-spacing: 0.6px;
  transition: color var(--transition-fast);
}

.navbar-logo:hover { color: var(--color-gold); }

.navbar-logo img { height: 40px; width: auto; }

.navbar-menu {
  list-style: none;
  display: none;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(16, 17, 24, 0.98);
  border-top: 1px solid var(--color-border);
  padding: 12px 0;
}

.navbar-menu.active { display: flex; }

@media (min-width: 992px) {
  .navbar-menu {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 18px;
    background: transparent;
    border-top: none;
    padding: 0;
  }
}

.nav-item { position: relative; }

.nav-link {
  display: block;
  padding: 10px 14px;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.2px;
  white-space: nowrap;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.nav-link:hover { color: var(--color-gold); transform: translateY(-1px); }

.nav-link.has-dropdown::after {
  content: '▾';
  font-size: 10px;
  margin-left: 6px;
  transition: transform var(--transition-fast);
}

.nav-link.has-dropdown.active::after { transform: rotate(180deg); }

.dropdown-menu {
  display: none;
  list-style: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: var(--shadow-soft);
  padding: 10px 0;
  z-index: 1300;
}

.dropdown-menu.active { display: flex; flex-direction: column; }

.dropdown-item {
  padding: 10px 16px;
  color: var(--color-text-weak);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
}

.dropdown-item:hover {
  color: #fff;
  background: rgba(255,255,255,0.04);
  border-left-color: var(--color-primary);
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 10px;
  cursor: pointer;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

@media (min-width: 992px) { .hamburger { display: none; } }

.navbar-actions { display: none; }

body { padding-top: 78px; }
@media (min-width: 992px) { body { padding-top: 86px; } }

.nav-link.active {
  color: var(--color-gold);
  font-weight: 800;
}

@media (min-width: 992px) {
  .nav-link.active::after {
    content: '';
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: -6px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  }
}