/* portalv2 主题变量：背景层级 + 文字色 + 卡片/边框 + 沉浸式视觉层 */
:root{
  --pv2-bg-base:#0a0c14;
  --pv2-bg-elev-1:rgba(255,255,255,.05);
  --pv2-bg-elev-2:#141428;
  --pv2-bg-modal-overlay:rgba(0,0,0,.6);
  --pv2-bg-modal-card:linear-gradient(160deg,rgba(30,30,60,.95) 0%,rgba(15,15,35,.98) 100%);
  --pv2-bg-promo:#0b1220;
  /* 文字色（默认深色主题） */
  --pv2-text-primary:#eaf2ff;
  --pv2-text-secondary:rgba(234,242,255,.6);
  --pv2-text-muted:rgba(234,242,255,.4);
  /* 卡片/边框/玻璃层（默认深色主题） */
  --pv2-card-bg:rgba(255,255,255,.04);
  --pv2-card-border:rgba(255,255,255,.08);
  --pv2-card-border-hover:rgba(255,255,255,.18);
  --pv2-input-bg:rgba(255,255,255,.03);
  --pv2-input-border:rgba(255,255,255,.1);
}

/* ========== 风格切换：4 套沉浸式视觉层 ========== */
/* 默认 = 明亮活力 bright */
:root,[data-theme="bright"]{
  --pv2-stage-bg:radial-gradient(1200px 800px at 20% 0%,#ff7a3a 0%,transparent 60%),radial-gradient(1100px 700px at 90% 20%,#ff4d8a 0%,transparent 55%),radial-gradient(900px 700px at 50% 100%,#7d5bff 0%,transparent 60%),linear-gradient(180deg,#0b1220 0%,#1a0b2e 100%);
  --pv2-orb-1:#ff7a3a;
  --pv2-orb-2:#7d5bff;
  --pv2-orb-3:#ff4d8a;
  --pv2-orb-blur:60px;
  --pv2-orb-opacity:.55;
  --pv2-stage-grid:radial-gradient(rgba(255,255,255,.08) 1px,transparent 1px);
  --pv2-stage-grid-size:24px 24px;
  --pv2-stage-grid-opacity:.35;
}

/* 极光森林 aurora */
[data-theme="aurora"]{
  --pv2-stage-bg:radial-gradient(1200px 800px at 20% 0%,#10b981 0%,transparent 60%),radial-gradient(1000px 700px at 85% 30%,#06b6d4 0%,transparent 55%),radial-gradient(900px 700px at 50% 100%,#34d399 0%,transparent 60%),linear-gradient(180deg,#04141a 0%,#0a1f1c 100%);
  --pv2-orb-1:#10b981;
  --pv2-orb-2:#06b6d4;
  --pv2-orb-3:#34d399;
  --pv2-orb-blur:60px;
  --pv2-orb-opacity:.5;
  --pv2-stage-grid:radial-gradient(rgba(16,185,129,.1) 1px,transparent 1px);
  --pv2-stage-grid-size:24px 24px;
  --pv2-stage-grid-opacity:.3;
}

/* 简约 minimal（深色低噪，无光球无点阵，视力友好） */
[data-theme="minimal"]{
  --pv2-stage-bg:linear-gradient(180deg,#1a1a20 0%,#121217 100%);
  --pv2-orb-1:transparent;
  --pv2-orb-2:transparent;
  --pv2-orb-3:transparent;
  --pv2-orb-blur:80px;
  --pv2-orb-opacity:0;
  --pv2-stage-grid:none;
  --pv2-stage-grid-size:24px 24px;
  --pv2-stage-grid-opacity:0;
}

/* 海洋深邃 ocean */
[data-theme="ocean"]{
  --pv2-stage-bg:radial-gradient(1200px 800px at 20% 0%,#3b82f6 0%,transparent 60%),radial-gradient(1000px 700px at 85% 25%,#06b6d4 0%,transparent 55%),radial-gradient(900px 700px at 50% 100%,#8b5cf6 0%,transparent 60%),linear-gradient(180deg,#020817 0%,#0a1828 100%);
  --pv2-orb-1:#3b82f6;
  --pv2-orb-2:#06b6d4;
  --pv2-orb-3:#8b5cf6;
  --pv2-orb-blur:60px;
  --pv2-orb-opacity:.5;
  --pv2-stage-grid:radial-gradient(rgba(59,130,246,.1) 1px,transparent 1px);
  --pv2-stage-grid-size:24px 24px;
  --pv2-stage-grid-opacity:.3;
}