@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;700&display=swap');
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html, body { width: 100%; height: 100%; overflow: hidden; }
  body {
    background: #04060d;
    color: #e2e8f0;
    font-family: 'Outfit', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    user-select: none;
  }
  #stage { position: fixed; inset: 0; cursor: grab; }
  #stage:active { cursor: grabbing; }
  #stage canvas { display: block; }
  #stage::after {
    content: ''; position: absolute; inset: 0; pointer-events: none;
    background: radial-gradient(ellipse at center, transparent 52%, rgba(2,4,10,.6) 100%);
  }
  header {
    position: fixed; top: 12px; left: 50%; transform: translateX(-50%);
    text-align: center; z-index: 10; pointer-events: none; width: 94vw;
  }
  h1 {
    font-size: 1.25rem; font-weight: 600;
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    text-shadow: none;
  }
  .subtitle { font-size: .72rem; color: #64748b; margin-top: 2px; }

  /* ——— 左侧工具栏 ——— */
  #tools {
    position: fixed; left: 14px; top: 50%; transform: translateY(-50%);
    display: flex; flex-direction: column; gap: 8px; z-index: 10;
  }
  .tool-btn {
    width: 42px; height: 42px; border-radius: 13px;
    background: rgba(15,20,32,.72); backdrop-filter: blur(14px);
    border: 1px solid rgba(255,255,255,.08);
    color: #cbd5e1; font-size: 16px; cursor: pointer;
    display: grid; place-items: center;
    transition: all .15s; box-shadow: 0 4px 16px rgba(0,0,0,.35);
  }
  .tool-btn:hover { background: rgba(32,44,66,.85); color: #fff; transform: scale(1.05); }
  .tool-btn.active {
    background: rgba(56,189,248,.16); border-color: rgba(56,189,248,.55); color: #7dd3fc;
    box-shadow: 0 0 14px rgba(56,189,248,.2);
  }

  /* ——— 底部控制区 ——— */
  #bottomBar {
    position: fixed; bottom: 10px; left: 50%; transform: translateX(-50%);
    z-index: 10; display: flex; flex-direction: column; gap: 7px;
    align-items: center; max-width: 96vw;
  }
  .row {
    display: flex; gap: 12px; align-items: center;
    background: rgba(13,18,30,.78); backdrop-filter: blur(16px);
    border: 1px solid rgba(255,255,255,.07); border-radius: 14px;
    padding: 7px 14px; box-shadow: 0 8px 30px rgba(0,0,0,.45);
    flex-wrap: wrap; justify-content: center;
  }
  .ctrl-btn {
    background: #1e293b; color: #e2e8f0; border: 1px solid #334155;
    padding: 6px 14px; border-radius: 9px; cursor: pointer;
    font-family: inherit; font-size: .78rem; transition: all .15s;
  }
  .ctrl-btn:hover { background: #334155; }
  .ctrl-group { display: flex; align-items: center; gap: 7px; font-size: .74rem; color: #94a3b8; }
  .ctrl-group input[type="range"] { accent-color: #38bdf8; width: 92px; cursor: pointer; }
  .val { color: #38bdf8; font-weight: 600; min-width: 52px; display: inline-block; }
  #stats { font-size: .72rem; color: #8ea0b5; gap: 15px; }
  #stats b { color: #38bdf8; font-weight: 600; }
  .legend { font-size: .68rem; color: #94a3b8; gap: 11px; }
  .legend-item { display: flex; align-items: center; gap: 4px; }
  .dot { width: 8px; height: 8px; border-radius: 50%; }

  /* ——— 信息面板 ——— */
  #infoPanel {
    position: fixed; right: 14px; top: 64px; width: 330px;
    max-height: calc(100vh - 240px); overflow-y: auto;
    background: rgba(13,17,28,.88); backdrop-filter: blur(18px);
    border: 1px solid rgba(255,255,255,.09); border-radius: 16px;
    padding: 16px 18px 18px; z-index: 12;
    box-shadow: 0 12px 40px rgba(0,0,0,.5);
    display: none; animation: slideIn .25s ease;
  }
  @keyframes slideIn { from { opacity: 0; transform: translateX(18px); } to { opacity: 1; transform: none; } }
  #infoPanel.open { display: block; }
  #infoPanel h3 { font-size: 1.02rem; color: #f1f5f9; }
  #infoPanel .en { font-size: .7rem; color: #64748b; margin: 2px 0 10px; letter-spacing: .3px; }
  #infoPanel .desc { font-size: .78rem; line-height: 1.75; color: #cbd5e1; }
  #infoPanel .desc strong { color: #facc15; font-weight: 600; }
  #infoPanel .chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
  .chip {
    font-size: .66rem; padding: 3px 9px; border-radius: 999px;
    background: rgba(56,189,248,.1); border: 1px solid rgba(56,189,248,.25); color: #7dd3fc;
  }
  #infoClose {
    position: absolute; top: 10px; right: 12px; cursor: pointer;
    color: #64748b; font-size: 1rem; background: none; border: none; padding: 4px;
  }
  #infoClose:hover { color: #f1f5f9; }

  /* ——— 引导浏览 ——— */
  #tourPanel {
    position: fixed; bottom: 205px; left: 50%; transform: translateX(-50%);
    width: min(580px, 94vw); z-index: 11; display: none;
    background: rgba(13,17,28,.86); backdrop-filter: blur(18px);
    border: 1px solid rgba(255,255,255,.09); border-radius: 16px;
    padding: 14px 18px; box-shadow: 0 12px 40px rgba(0,0,0,.5);
    animation: slideIn .25s ease;
  }
  #tourPanel.open { display: block; }
  #tourTitle { font-size: .95rem; color: #7dd3fc; font-weight: 600; margin-bottom: 5px; }
  #tourText { font-size: .76rem; line-height: 1.7; color: #cbd5e1; min-height: 66px; }
  #tourText strong { color: #facc15; }
  #tourNav { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
  .dots-nav { display: flex; gap: 5px; flex: 1; justify-content: center; }
  .dots-nav i { width: 7px; height: 7px; border-radius: 50%; background: #334155; cursor: pointer; transition: .2s; }
  .dots-nav i.on { background: #38bdf8; box-shadow: 0 0 6px #38bdf8; }

  #followChip {
    position: fixed; top: 62px; left: 50%; transform: translateX(-50%);
    z-index: 11; display: none; font-size: .72rem; color: #a5f3fc;
    background: rgba(13,20,30,.85); border: 1px solid rgba(34,211,238,.35);
    padding: 5px 14px; border-radius: 999px; backdrop-filter: blur(10px);
  }
  #tooltip {
    position: fixed; pointer-events: none; z-index: 20;
    background: rgba(10,15,26,.92); border: 1px solid rgba(255,255,255,.14);
    padding: 4px 11px; border-radius: 9px; font-size: .74rem; display: none;
    color: #e2e8f0; white-space: nowrap;
  }
  #hint {
    position: fixed; left: 16px; bottom: 12px; z-index: 9;
    font-size: .66rem; color: #475569; line-height: 1.7; pointer-events: none;
  }
  #loading {
    position: fixed; inset: 0; z-index: 50; display: grid; place-items: center;
    background: #04060d; transition: opacity .5s; color: #64748b; font-size: .85rem;
  }
  #loading .spin {
    width: 34px; height: 34px; margin: 0 auto 12px;
    border: 3px solid #1e293b; border-top-color: #38bdf8; border-radius: 50%;
    animation: rot 0.9s linear infinite;
  }
  @keyframes rot { to { transform: rotate(360deg); } }
  ::-webkit-scrollbar { width: 5px; }
  ::-webkit-scrollbar-thumb { background: #1e293b; border-radius: 3px; }

/* ── Back-to-home button (shared across all pages) ── */
#homeBtn {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 100;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 18px 0 14px;
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 19px;
  color: #e2e8f0;
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}
#homeBtn:hover {
  background: rgba(30, 41, 59, 0.95);
  border-color: rgba(148, 163, 184, 0.45);
  color: #ffffff;
  transform: translateY(-1px);
}
#homeBtn:active { transform: translateY(0); }

/* ── language switcher pill ── */
.lang-switch {
  position: fixed;
  top: 14px;
  left: 116px;
  z-index: 100;
  display: inline-flex;
  align-items: center;
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 999px;
  padding: 2px;
}
.lang-btn {
  background: transparent;
  border: none;
  color: #94a3b8;
  padding: 5px 11px;
  font-size: 12px;
  font-family: inherit;
  font-weight: 500;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  line-height: 1;
  transition: all .2s ease;
}
.lang-btn:hover { color: #e2e8f0; }
.lang-btn.active {
  background: rgba(56, 189, 248, 0.22);
  color: #38bdf8;
  font-weight: 600;
}
.i18n-loading [data-i18n] { visibility: hidden; }

  /* ——— 任务预设导航条 ——— */
  #missionBar {
    display: flex; gap: 6px; align-items: center; justify-content: center;
    margin-top: 6px; pointer-events: auto; flex-wrap: wrap;
  }
  .mission-label { font-size: 0.7rem; color: #94a3b8; margin-right: 4px; }
  .mission-btn {
    background: rgba(15, 23, 42, 0.75); border: 1px solid rgba(255, 255, 255, 0.12);
    color: #cbd5e1; font-size: 0.72rem; padding: 3px 10px; border-radius: 999px;
    cursor: pointer; transition: all 0.18s ease; backdrop-filter: blur(8px);
  }
  .mission-btn:hover { background: rgba(30, 41, 59, 0.9); color: #ffffff; border-color: #38bdf8; }
  .mission-btn.active {
    background: rgba(56, 189, 248, 0.22); border-color: #38bdf8; color: #7dd3fc;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.3); font-weight: 600;
  }

  /* ——— 常平架矢量偏转小部件 ——— */
  #gimbalWidget {
    position: fixed; left: 70px; top: 50%; transform: translateY(-50%);
    background: rgba(13, 18, 30, 0.88); backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.12); border-radius: 16px;
    padding: 14px 16px; z-index: 12; display: none; width: 220px;
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.55); animation: slideIn 0.2s ease;
  }
  #gimbalWidget.open { display: block; }
  #gimbalWidget h4 { font-size: 0.82rem; color: #7dd3fc; margin-bottom: 8px; display: flex; justify-content: space-between; }
  .gimbal-row { display: flex; flex-direction: column; gap: 4px; margin-bottom: 10px; font-size: 0.72rem; color: #94a3b8; }
  .gimbal-row input[type="range"] { accent-color: #38bdf8; width: 100%; cursor: pointer; }
  .gimbal-val-row { display: flex; justify-content: space-between; }
  .gimbal-btn-row { display: flex; gap: 8px; margin-top: 6px; }
  .gimbal-reset-btn {
    flex: 1; padding: 4px 8px; background: #1e293b; border: 1px solid #334155;
    color: #e2e8f0; border-radius: 6px; font-size: 0.7rem; cursor: pointer;
  }
  .gimbal-reset-btn:hover { background: #334155; color: #fff; }

  /* ——— 栅格单孔微观等离子体透镜模态框 ——— */
  #apertureModal {
    position: fixed; inset: 0; z-index: 40; display: none;
    background: rgba(3, 7, 18, 0.85); backdrop-filter: blur(20px);
    place-items: center; padding: 16px; animation: fadeIn 0.25s ease;
  }
  #apertureModal.open { display: grid; }
  @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

  .aperture-dialog {
    width: min(920px, 94vw); max-height: 92vh; background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(56, 189, 248, 0.35); border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.75); display: flex; flex-direction: column;
    overflow: hidden;
  }
  .aperture-header {
    padding: 14px 20px; border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex; justify-content: space-between; align-items: center;
  }
  .aperture-header h3 { font-size: 1.05rem; color: #7dd3fc; display: flex; align-items: center; gap: 8px; }
  .aperture-close {
    background: none; border: none; font-size: 1.2rem; color: #94a3b8;
    cursor: pointer; padding: 4px 8px; border-radius: 6px;
  }
  .aperture-close:hover { color: #fff; background: rgba(255, 255, 255, 0.1); }

  .aperture-body {
    display: flex; flex-direction: column; gap: 12px; padding: 16px 20px;
    overflow-y: auto;
  }
  #apertureCanvas {
    width: 100%; height: 320px; background: #02040a; border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1); display: block;
  }
  .aperture-controls {
    display: flex; gap: 16px; align-items: center; flex-wrap: wrap;
    background: rgba(10, 15, 28, 0.6); padding: 10px 14px; border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.06);
  }
  .aperture-stats {
    display: flex; gap: 16px; align-items: center; flex-wrap: wrap;
    font-size: 0.76rem; color: #94a3b8;
  }
  .aperture-stats b { color: #38bdf8; }
  .regime-tag {
    padding: 3px 10px; border-radius: 999px; font-weight: 600; font-size: 0.72rem;
  }
  .regime-tag.optimal { background: rgba(16, 185, 129, 0.2); color: #34d399; border: 1px solid #10b981; }
  .regime-tag.under_focused { background: rgba(239, 68, 68, 0.2); color: #f87171; border: 1px solid #ef4444; }
  .regime-tag.over_focused { background: rgba(245, 158, 11, 0.2); color: #fbbf24; border: 1px solid #f59e0b; }
  .aperture-expl {
    font-size: 0.75rem; line-height: 1.7; color: #cbd5e1; background: rgba(2, 6, 23, 0.4);
    padding: 10px 14px; border-radius: 10px; border-left: 3px solid #38bdf8;
  }

  /* 音效与控制按钮状态 */
  .tool-btn.muted { color: #64748b; }