.sidebar {
  width: 260px !important;
  background: linear-gradient(180deg, #1a1f2e 0%, #141824 50%, #0d1018 100%) !important;
  display: flex !important;
  flex-direction: column !important;
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  height: 100vh !important;
  z-index: 100 !important;
  overflow-y: auto !important;
  box-shadow: 
    4px 0 24px rgba(0, 0, 0, 0.4),
    inset -1px 0 0 rgba(255, 255, 255, 0.03),
    inset 1px 0 0 rgba(0, 0, 0, 0.3);
}

.sidebar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.sidebar-header {
  padding: 18px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  position: relative;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02) 0%, transparent 100%);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #a855f7 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 
    0 4px 16px rgba(79, 70, 229, 0.4),
    0 0 0 1px rgba(255, 255, 255, 0.1) inset,
    0 -2px 0 rgba(0, 0, 0, 0.2) inset;
  position: relative;
  overflow: hidden;
}

.brand-logo::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.25) 0%, transparent 50%);
}

.brand-logo::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.15) 100%);
}

.brand-logo svg {
  width: 22px;
  height: 22px;
  fill: white;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.2));
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.brand-tagline {
  font-size: 9px;
  color: rgba(255, 255, 255, 0.4);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  overflow-y: auto;
  position: relative;
}

.nav-group {
  margin-bottom: 16px;
}

.nav-group-title {
  padding: 0 10px;
  margin-bottom: 6px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.nav-group-title-cn {
  font-size: 11px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.nav-group-title-en {
  font-size: 8px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.25);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.55);
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 2px;
  position: relative;
  background: transparent;
  border: 1px solid transparent;
}

.nav-item-label {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.nav-item-label-cn {
  font-size: 12px;
  font-weight: 500;
  color: inherit;
}

.nav-item-label-en {
  font-size: 8px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.nav-item:hover {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.02) 100%);
  color: rgba(255, 255, 255, 0.9);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.nav-item:hover .nav-item-label-en {
  color: rgba(255, 255, 255, 0.45);
}

.nav-item.active {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.2) 0%, rgba(124, 58, 237, 0.15) 100%);
  color: #ffffff;
  border-color: rgba(139, 92, 246, 0.3);
  box-shadow: 
    0 4px 16px rgba(79, 70, 229, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.1);
}

.nav-item.active .nav-item-label-en {
  color: rgba(255, 255, 255, 0.5);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 16px;
  background: linear-gradient(180deg, #6366f1 0%, #a855f7 100%);
  border-radius: 0 3px 3px 0;
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.5);
}

.nav-item-icon {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.8;
}

.nav-item.active .nav-item-icon {
  opacity: 1;
}

.nav-item-icon svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.nav-item-badge {
  margin-left: auto;
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  color: #ffffff;
  font-size: 9px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.4);
}

.sidebar-footer {
  padding: 14px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  position: sticky;
  bottom: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
  margin-top: auto;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  cursor: pointer;
  transition: all 0.2s ease;
}

.user-profile:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.1);
}

.user-avatar {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 700;
  font-size: 13px;
  box-shadow: 
    0 2px 8px rgba(79, 70, 229, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 12px;
  font-weight: 600;
  color: #ffffff;
}

.user-role {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.4);
}

@media (max-width: 1024px) {
  .sidebar { width: 220px; }
}

@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
}