/* 平台总控 — 深蓝商务层级 */
:root {
  --primary: #0f4c81;
  --primary-dark: #0a3558;
  --primary-light: #e8f1fa;
  --primary-gradient: linear-gradient(135deg, #0f4c81 0%, #1677ff 100%);
  --sidebar-bg: linear-gradient(180deg, #0a3558 0%, #0f4c81 100%);
  --bg-page: #eef2f8;
  --bg-gradient-start: #eef2f8;
  --bg-gradient-end: #ffffff;
}

.admin-shell.platform .sidebar {
  background: var(--sidebar-bg);
  border-right: none;
}
.admin-shell.platform .sidebar-brand {
  border-bottom-color: rgba(255, 255, 255, 0.12);
}
.admin-shell.platform .sidebar-brand h2,
.admin-shell.platform .sidebar-brand span {
  color: #fff;
}
.admin-shell.platform .sidebar-brand span {
  opacity: 0.75;
}
.admin-shell.platform .nav-item {
  color: rgba(255, 255, 255, 0.75);
}
.admin-shell.platform .nav-item:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}
.admin-shell.platform .nav-item.active {
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}
.admin-shell.platform .sidebar-footer {
  border-top-color: rgba(255, 255, 255, 0.12);
}
.admin-shell.platform .sidebar-footer .user {
  color: rgba(255, 255, 255, 0.85);
}
.admin-shell.platform .sidebar-footer .user strong {
  color: #fff;
}
.admin-shell.platform .topbar {
  background: rgba(255, 255, 255, 0.92);
}
.admin-shell.platform .badge-platform {
  background: var(--primary-gradient);
  color: #fff;
  padding: 4px 12px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
}