:root {
      --ui-canvas: #f0f4fa;
      --ui-ink: #1a2332;
      --ui-stroke: #d8dee8;
      --ui-muted: #8a9bb0;
      --ui-breeze: #a8b8c8;
      --ui-panel-fill: rgba(255, 255, 255, 0.72);
      --ui-panel-ring: rgba(255, 255, 255, 0.9);
      --ui-cool: #1e88e5;
      --ui-warm: #ff8a50;
      --ui-lcd-base: linear-gradient(155deg, #1e2838 0%, #121820 45%, #0c1018 100%);
      --ui-lcd-glow-a: rgba(100, 200, 255, 0.45);
      --ui-lcd-glow-b: rgba(255, 180, 100, 0.4);
      --ui-dot: black;
    }
    html.dark {
      --ui-canvas: #0c0e12;
      --ui-ink: #e8ecf4;
      --ui-stroke: #2a3140;
      --ui-muted: #6b7a90;
      --ui-breeze: #5a6578;
      --ui-panel-fill: rgba(28, 32, 42, 0.75);
      --ui-panel-ring: rgba(255, 255, 255, 0.08);
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      min-height: 100vh;
      font-family: system-ui, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--ui-ink);
      background: var(--ui-canvas);
      transition: background-color 0.45s ease, color 0.25s ease;
      -webkit-font-smoothing: antialiased;
      position: relative;
      overflow-x: hidden;
    }

    /* 环境光晕（随开关机 / 模式变化） */
    .ambient-layer {
      pointer-events: none;
      position: fixed;
      inset: 0;
      z-index: 0;
      opacity: 0;
      transition: opacity 0.8s ease;
      background: radial-gradient(ellipse 80% 50% at 50% 20%, rgba(120, 190, 255, 0.22), transparent 55%),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(180, 210, 255, 0.12), transparent 50%);
    }
    .ambient-layer.on.cold {
      opacity: 1;
      background: radial-gradient(ellipse 85% 55% at 50% 18%, rgba(100, 185, 255, 0.28), transparent 58%),
        radial-gradient(ellipse 50% 35% at 15% 70%, rgba(80, 160, 255, 0.14), transparent 50%),
        radial-gradient(ellipse 45% 30% at 90% 55%, rgba(140, 200, 255, 0.1), transparent 45%);
    }
    .ambient-layer.on.hot {
      opacity: 1;
      background: radial-gradient(ellipse 80% 50% at 50% 22%, rgba(255, 160, 90, 0.22), transparent 55%),
        radial-gradient(ellipse 55% 40% at 85% 65%, rgba(255, 120, 60, 0.12), transparent 48%);
    }

    .wrap {
      position: relative;
      z-index: 1;
      max-width: 560px;
      margin: 0 auto;
      padding: 20px 16px 32px;
    }

    .page-shell {
      background: var(--ui-panel-fill);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--ui-panel-ring);
      border-radius: 24px;
      box-shadow: 0 4px 24px rgba(15, 35, 60, 0.06), 0 24px 48px rgba(15, 35, 60, 0.04);
      padding: 28px 22px 32px;
    }
    html.dark .page-shell {
      box-shadow: 0 4px 32px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.04);
    }

    .title-block { text-align: center; margin-bottom: 8px; }
    .title-block h1 {
      font-size: clamp(1.5rem, 4.5vw, 1.85rem);
      font-weight: 700;
      letter-spacing: 0.04em;
      margin: 0 0 6px;
      background: linear-gradient(135deg, var(--ui-ink) 0%, #5a6a82 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    html.dark .title-block h1 {
      background: linear-gradient(135deg, #f0f4ff 0%, #9ab0d0 100%);
      -webkit-background-clip: text;
      background-clip: text;
    }
    .title-block .subtitle {
      font-size: 0.8rem;
      color: var(--ui-muted);
      font-weight: 500;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      opacity: 0.85;
    }

    /* 使用说明 */
    .help-panel {
      margin: 18px 0 20px;
      border-radius: 14px;
      border: 1px solid var(--ui-stroke);
      background: rgba(255, 255, 255, 0.45);
      overflow: hidden;
    }
    html.dark .help-panel {
      background: rgba(0, 0, 0, 0.2);
    }
    .help-panel summary {
      cursor: pointer;
      list-style: none;
      padding: 12px 16px;
      font-weight: 600;
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      gap: 8px;
      user-select: none;
    }
    .help-panel summary::-webkit-details-marker { display: none; }
    .help-panel summary::before {
      content: "📖";
      font-size: 1rem;
    }
    .help-panel[open] summary::before { content: "📕"; }
    .help-panel .help-body {
      padding: 0 16px 16px;
      font-size: 0.82rem;
      line-height: 1.75;
      color: var(--ui-ink);
      opacity: 0.92;
    }
    .help-panel .help-body ul { margin: 0; padding-left: 1.1rem; }
    .help-panel .help-body li { margin: 0.35rem 0; }
    .help-panel .help-body kbd {
      display: inline-block;
      padding: 1px 6px;
      border-radius: 4px;
      font-size: 0.78rem;
      font-family: inherit;
      border: 1px solid var(--ui-stroke);
      background: rgba(0, 0, 0, 0.04);
    }
    html.dark .help-panel .help-body kbd {
      background: rgba(255, 255, 255, 0.06);
    }

    .pro-tip {
      margin: 14px 0 20px;
      padding: 10px 14px;
      border-radius: 12px;
      background: linear-gradient(105deg, rgba(255, 248, 235, 0.9) 0%, rgba(255, 252, 245, 0.6) 100%);
      border: 1px solid rgba(243, 168, 59, 0.25);
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
      font-size: 0.88rem;
    }
    html.dark .pro-tip {
      background: linear-gradient(105deg, rgba(50, 42, 30, 0.6) 0%, rgba(40, 35, 28, 0.4) 100%);
      border-color: rgba(243, 168, 59, 0.2);
    }
    .tip-icon {
      cursor: pointer;
      font-size: 1.35rem;
      user-select: none;
      transition: transform 0.25s ease;
      filter: drop-shadow(0 2px 4px rgba(243, 168, 59, 0.35));
    }
    .tip-icon:hover { transform: scale(1.12) rotate(-8deg); }

    /* 内层：色温滤镜（开机时） */
    .inner.mode-on.cold { filter: saturate(96%) hue-rotate(-4deg); }
    .inner.mode-on.hot { filter: saturate(112%) hue-rotate(6deg); }

    /* 空调安装位 */
    .ac-mount {
      position: relative;
      margin-top: 8px;
      padding-top: 12px;
    }
    .ac-mount::before {
      content: "";
      position: absolute;
      left: 50%;
      top: 0;
      transform: translateX(-50%);
      width: 72%;
      height: 6px;
      background: linear-gradient(180deg, #c5cdd8 0%, #e2e8f0 100%);
      border-radius: 3px 3px 0 0;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    }
    html.dark .ac-mount::before {
      background: linear-gradient(180deg, #3a4252 0%, #2a3140 100%);
    }

    .ac-unit { position: relative; }

    /* 主机外壳：塑料质感 */
    .ac-border {
      position: relative;
      height: 10.5rem;
      border-radius: 12px;
      border-bottom-left-radius: 22px;
      border-bottom-right-radius: 22px;
      background: linear-gradient(180deg, #fafbfd 0%, #f0f3f8 38%, #e8ecf4 100%);
      border: 1px solid rgba(200, 210, 225, 0.95);
      box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.9) inset,
        0 12px 28px rgba(25, 45, 80, 0.1),
        0 4px 10px rgba(25, 45, 80, 0.06);
    }
    html.dark .ac-border {
      background: linear-gradient(180deg, #2c323f 0%, #232830 50%, #1a1f28 100%);
      border-color: rgba(70, 80, 100, 0.5);
      box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.04) inset,
        0 16px 36px rgba(0, 0, 0, 0.45);
    }

    /* 正面格栅纹理 */
    .ac-grille {
      position: absolute;
      left: 12px;
      right: 12px;
      top: 52px;
      bottom: 36px;
      border-radius: 6px;
      background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 5px,
        rgba(0, 0, 0, 0.04) 5px,
        rgba(0, 0, 0, 0.04) 6px
      );
      opacity: 0.55;
      pointer-events: none;
    }
    html.dark .ac-grille {
      background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 5px,
        rgba(255, 255, 255, 0.03) 5px,
        rgba(255, 255, 255, 0.03) 6px
      );
    }

    /* LCD 显示屏 */
    .ac-display-wrap {
      position: absolute;
      top: 1.1rem;
      right: 1.25rem;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.35s ease;
    }
    .ac-display-wrap.visible {
      opacity: 1;
      pointer-events: auto;
    }
    .lcd-panel {
      padding: 8px 14px 10px;
      border-radius: 8px;
      background: var(--ui-lcd-base);
      border: 1px solid rgba(255, 255, 255, 0.1);
      box-shadow:
        inset 0 2px 12px rgba(0, 0, 0, 0.45),
        0 1px 0 rgba(255, 255, 255, 0.06);
      position: relative;
      overflow: hidden;
    }
    .lcd-panel::after {
      content: "";
      position: absolute;
      inset: 0;
      background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.06) 2px,
        rgba(0, 0, 0, 0.06) 3px
      );
      pointer-events: none;
      opacity: 0.35;
    }
    /* LCD 内文字：始终用浅色，避免浅色模式下继承正文深色看不清 */
    .lcd-panel h6 {
      margin: 0;
      font-size: 0.8rem;
      font-weight: 500;
      letter-spacing: 0.02em;
      color: rgba(210, 228, 248, 0.95);
      text-shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
    }
    .inner.cold .lcd-panel h6 {
      color: rgba(185, 230, 255, 0.96);
      text-shadow: 0 0 10px rgba(120, 200, 255, 0.25), 0 1px 3px rgba(0, 0, 0, 0.4);
    }
    .inner.hot .lcd-panel h6 {
      color: rgba(255, 224, 195, 0.96);
      text-shadow: 0 0 10px rgba(255, 180, 120, 0.2), 0 1px 3px rgba(0, 0, 0, 0.4);
    }
    html.dark .lcd-panel h6 {
      color: rgba(220, 232, 248, 0.92);
      text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    }
    html.dark .inner.cold .lcd-panel h6 {
      color: rgba(190, 235, 255, 0.94);
    }
    html.dark .inner.hot .lcd-panel h6 {
      color: rgba(255, 215, 175, 0.94);
    }
    .ac-temp {
      font-family: "Cascadia Code", "Cascadia Mono", Consolas, "SF Mono", ui-monospace, monospace;
      font-size: 2.1rem;
      text-align: center;
      margin: 4px 0 0;
      line-height: 1.1;
      transition: color 0.35s ease, text-shadow 0.35s ease;
    }
    .ac-temp small { font-size: 0.95rem; margin-left: 2px; font-weight: normal; opacity: 0.9; }
    .ac-temp.digits-cold {
      color: #7fdcff;
      text-shadow: 0 0 16px var(--ui-lcd-glow-a), 0 0 2px rgba(255, 255, 255, 0.2);
    }
    .ac-temp.digits-hot {
      color: #ffc266;
      text-shadow: 0 0 16px var(--ui-lcd-glow-b), 0 0 2px rgba(255, 255, 255, 0.15);
    }

    .ac-logo {
      text-align: center;
      padding-top: 7.25rem;
      position: relative;
      z-index: 1;
    }
    .ac-logo .emblem-mark {
      display: inline-block;
      color: #7a8899;
      opacity: 0.55;
      transition: opacity 0.2s ease;
    }
    html.dark .ac-logo .emblem-mark { color: #8b9cb0; }
    .ac-logo .emblem-mark:hover { opacity: 0.95; }
    .ac-logo svg { display: block; margin: 0 auto; width: 14px; height: auto; }

    /* 出风口百叶 */
    .ac-outlet {
      margin: 6px 14px 0;
      padding: 6px 0 8px;
      border-top: 1px solid var(--ui-stroke);
    }
    .outlet-slats {
      display: flex;
      flex-direction: column;
      gap: 3px;
      align-items: stretch;
    }
    .outlet-slats span {
      display: block;
      height: 3px;
      border-radius: 1px;
      background: linear-gradient(90deg, #d0d8e4 0%, #eef1f6 40%, #c8d0dc 100%);
      box-shadow: 0 1px 0 rgba(255, 255, 255, 0.6) inset;
    }
    html.dark .outlet-slats span {
      background: linear-gradient(90deg, #3a4250 0%, #4a5568 50%, #353d4a 100%);
      box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05) inset;
    }

    /* 运行指示灯 */
    .ac-led {
      position: absolute;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      top: calc(10.5rem - 22px);
      right: 12px;
      background: #b8c0cc;
      box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.2);
      transition: background 0.25s ease, box-shadow 0.25s ease;
    }
    .ac-led.on {
      background: #3af708;
      box-shadow: 0 0 10px 3px rgba(58, 247, 8, 0.55), 0 0 20px rgba(58, 247, 8, 0.25);
      animation: ledPulse 1.4s ease-in-out infinite;
    }
    @keyframes ledPulse {
      0%, 100% { opacity: 1; filter: brightness(1); }
      50% { opacity: 0.88; filter: brightness(1.15); }
    }

    /* 能效贴（略提亮边缘） */
    .energy-label {
      position: absolute;
      padding: 4px;
      background: linear-gradient(145deg, #5ab0ff 0%, #3d94eb 100%);
      border-radius: 3px;
      top: 10px;
      left: 10px;
      height: 70px;
      width: 50px;
      box-shadow: 0 2px 6px rgba(30, 120, 200, 0.25);
    }
    .text-dots { display: flex; justify-content: center; flex-wrap: wrap; }
    .text-dot { border-radius: 50%; background: var(--ui-dot); display: inline-block; }
    .energy-body {
      margin: 4px 0;
      height: 28px;
      width: 100%;
      background: #fff;
      padding: 2px 8px;
    }
    .energy-row { display: flex; align-items: center; height: 3px; }
    .energy-row .bar { height: 3px; }
    .energy-level { margin-top: 2px; height: 3px; }
    .energy-footer-dots {
      width: 100%;
      height: 20px;
      background: #fff;
      margin-bottom: 2px;
      padding-top: 1px;
    }
    .energy-divider { width: 100%; height: 0; border-top: 1px solid #333; margin: 1px 0; }

    .energy-saving {
      color: #000;
      opacity: 0.85;
      position: absolute;
      top: 10px;
      left: 63px;
      background: #4caf50;
      padding: 12px;
      border-radius: 2px;
      transform: scale(0.22);
      transform-origin: left top;
      text-decoration: none;
      transition: opacity 0.2s ease;
    }
    .energy-saving:hover { opacity: 1; }
    .energy-saving-static {
      cursor: default;
      pointer-events: none;
    }
    .energy-saving-inner {
      padding: 10px;
      width: 200px;
      border-radius: 15px;
      background: #fafafa;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }
    .energy-saving-title { font-size: 20px; margin: 2px 0; }
    .energy-saving-desc { font-size: 12px; line-height: 1.4; }

    /* 冷气薄雾 */
    .ac-mist {
      position: absolute;
      left: 10%;
      right: 10%;
      top: 100%;
      height: 48px;
      margin-top: 4px;
      pointer-events: none;
      opacity: 0;
      transition: opacity 0.5s ease;
      background: radial-gradient(ellipse 70% 80% at 50% 0%, rgba(200, 230, 255, 0.35), transparent 70%);
      filter: blur(8px);
    }
    .ac-mist.active {
      opacity: 1;
      animation: mistDrift 3s ease-in-out infinite;
    }
    @keyframes mistDrift {
      0%, 100% { transform: translateX(-4px) scaleX(1); opacity: 0.85; }
      50% { transform: translateX(4px) scaleX(1.03); opacity: 1; }
    }

    /* 热风微光 */
    .ac-heat-shimmer {
      position: absolute;
      left: 8%;
      right: 8%;
      top: 100%;
      height: 40px;
      margin-top: 2px;
      pointer-events: none;
      opacity: 0;
      transition: opacity 0.5s ease;
      background: radial-gradient(ellipse 65% 100% at 50% 0%, rgba(255, 180, 100, 0.2), transparent 65%);
    }
    .ac-heat-shimmer.active { opacity: 1; animation: heatWave 2.2s ease-in-out infinite; }
    @keyframes heatWave {
      0%, 100% { transform: translateY(0); opacity: 0.7; }
      50% { transform: translateY(3px); opacity: 1; }
    }

    /* 气流 */
    .wind-wrap {
      display: flex;
      justify-content: center;
      gap: 2.75rem;
      margin: 1.5rem 0 0.5rem;
      opacity: 0;
      transition: opacity 0.4s ease;
    }
    .wind-wrap.visible { opacity: 1; }
    .wind-line {
      width: 5px;
      height: 3rem;
      border-radius: 2px;
      background: linear-gradient(180deg, rgba(180, 200, 220, 0.5) 0%, rgba(140, 165, 190, 0.25) 100%);
      transform-origin: 50% 0%;
    }
    html.dark .wind-line {
      background: linear-gradient(180deg, rgba(120, 140, 170, 0.4) 0%, rgba(90, 110, 140, 0.2) 100%);
    }
    .wind-wrap.visible .wind-line.l { animation: windSwayL 2.2s ease-in-out infinite; }
    .wind-wrap.visible .wind-line:not(.l):not(.r) { animation: windSwayM 2s ease-in-out infinite 0.15s; }
    .wind-wrap.visible .wind-line.r { animation: windSwayR 2.2s ease-in-out infinite 0.08s; }
    @keyframes windSwayL {
      0%, 100% { transform: rotate(11deg) translateY(0); opacity: 0.45; }
      50% { transform: rotate(16deg) translateY(-6px); opacity: 0.75; }
    }
    @keyframes windSwayM {
      0%, 100% { transform: rotate(0deg) translateY(0); opacity: 0.5; }
      50% { transform: rotate(0deg) translateY(-8px); opacity: 0.85; }
    }
    @keyframes windSwayR {
      0%, 100% { transform: rotate(-11deg) translateY(0); opacity: 0.45; }
      50% { transform: rotate(-16deg) translateY(-6px); opacity: 0.75; }
    }

    .inner.mode-on.cold .wind-line {
      box-shadow: 0 0 12px rgba(150, 210, 255, 0.25);
    }
    .inner.mode-on.hot .wind-line {
      box-shadow: 0 0 12px rgba(255, 180, 120, 0.2);
    }

    .bill-panel {
      margin: 1.35rem 0 0.25rem;
      padding: 0;
      border-radius: 16px;
      border: 1px solid var(--ui-stroke);
      background: rgba(255, 255, 255, 0.55);
      overflow: hidden;
    }
    html.dark .bill-panel {
      background: rgba(0, 0, 0, 0.22);
    }
    .bill-summary {
      list-style: none;
      cursor: pointer;
      margin: 0;
      padding: 14px 16px;
      font-size: 1rem;
      font-weight: 700;
      text-align: center;
      user-select: none;
    }
    .bill-summary::-webkit-details-marker {
      display: none;
    }
    .bill-panel[open] .bill-summary {
      border-bottom: 1px solid var(--ui-stroke);
    }
    .bill-body {
      padding: 14px 16px 16px;
    }
    .bill-note {
      margin: 0 0 14px;
      font-size: 0.78rem;
      line-height: 1.55;
      color: var(--ui-muted);
      text-align: center;
    }
    .bill-type-row {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px 12px;
      margin-bottom: 10px;
    }
    .bill-type-opt {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      cursor: pointer;
      font-size: 0.85rem;
      padding: 6px 10px;
      border-radius: 999px;
      border: 1px solid var(--ui-stroke);
      background: rgba(255, 255, 255, 0.5);
    }
    html.dark .bill-type-opt {
      background: rgba(255, 255, 255, 0.06);
    }
    .bill-type-opt--on {
      border-color: var(--ui-cool);
      background: rgba(30, 136, 229, 0.1);
    }
    html.dark .bill-type-opt--on {
      background: rgba(100, 181, 246, 0.15);
    }
    .bill-type-opt--on span {
      font-weight: 700;
    }
    .bill-type-opt input {
      margin: 0;
      accent-color: var(--ui-cool);
    }
    .bill-kw-line {
      margin: 0 0 12px;
      font-size: 0.78rem;
      color: var(--ui-muted);
      text-align: center;
    }
    .bill-price-row {
      display: flex;
      justify-content: center;
      margin-bottom: 14px;
    }
    .bill-price-label {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.85rem;
    }
    .bill-price-input {
      width: 5.5rem;
      padding: 6px 10px;
      border-radius: 8px;
      border: 1px solid var(--ui-stroke);
      font-size: 0.9rem;
      font-family: inherit;
      background: rgba(255, 255, 255, 0.9);
      color: var(--ui-ink);
    }
    html.dark .bill-price-input {
      background: rgba(40, 45, 58, 0.9);
      color: var(--ui-ink);
    }
    .bill-readout {
      margin: 0;
      padding: 12px 12px 10px;
      border-radius: 12px;
      background: rgba(0, 0, 0, 0.04);
    }
    html.dark .bill-readout {
      background: rgba(0, 0, 0, 0.25);
    }
    .bill-readout-row {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      gap: 12px;
      padding: 6px 0;
      font-size: 0.86rem;
      border-bottom: 1px solid var(--ui-stroke);
    }
    .bill-readout-row:last-of-type {
      border-bottom: none;
    }
    .bill-readout dt {
      margin: 0;
      font-weight: 500;
      color: var(--ui-muted);
    }
    .bill-readout dd {
      margin: 0;
      font-variant-numeric: tabular-nums;
      font-weight: 600;
    }
    .bill-readout-total dt,
    .bill-readout-total dd {
      color: var(--ui-cool);
    }
    html.dark .bill-readout-total dt,
    html.dark .bill-readout-total dd {
      color: #90caf9;
    }
    .bill-reset {
      display: block;
      width: 100%;
      margin-top: 12px;
      padding: 8px 12px;
      border-radius: 10px;
      border: 1px dashed var(--ui-stroke);
      background: transparent;
      cursor: pointer;
      font-size: 0.8rem;
      font-family: inherit;
      color: var(--ui-muted);
    }
    .bill-reset:hover {
      border-color: var(--ui-cool);
      color: var(--ui-cool);
    }

    .rc-label {
      text-align: center;
      font-size: 0.72rem;
      font-weight: 600;
      letter-spacing: 0.2em;
      color: var(--ui-muted);
      margin: 1.25rem 0 0.35rem;
      text-transform: uppercase;
    }

    .btn-row {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      margin: 0.5rem 0;
      gap: 4px;
    }
    .rc-btn {
      width: 58px;
      height: 58px;
      border-radius: 50%;
      border: none;
      margin: 6px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.45rem;
      color: #fff;
      position: relative;
      transition: transform 0.12s ease, box-shadow 0.2s ease;
      box-shadow:
        0 4px 0 rgba(0, 0, 0, 0.12),
        0 8px 20px rgba(0, 0, 0, 0.12),
        inset 0 2px 0 rgba(255, 255, 255, 0.22);
    }
    .rc-btn:active {
      transform: translateY(3px) scale(0.97);
      box-shadow: 0 1px 0 rgba(0, 0, 0, 0.15), inset 0 2px 6px rgba(0, 0, 0, 0.15);
    }
    .rc-btn:focus-visible {
      outline: 2px solid var(--ui-cool);
      outline-offset: 3px;
    }
    .rc-btn.cold {
      background: linear-gradient(160deg, #2196f3 0%, #1565c0 100%);
    }
    .rc-btn.power-on {
      background: linear-gradient(160deg, #ef5350 0%, #c62828 100%);
    }
    .rc-btn.power-off {
      background: linear-gradient(160deg, #66bb6a 0%, #2e7d32 100%);
    }
    .rc-btn.hot {
      background: linear-gradient(160deg, #ffa726 0%, #e65100 100%);
    }
    .rc-btn.temp {
      background: linear-gradient(160deg, #eceff4 0%, #cfd8e6 100%);
      color: #37474f;
      font-size: 1.35rem;
      box-shadow: 0 3px 0 rgba(0, 0, 0, 0.08), 0 6px 16px rgba(0, 0, 0, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.7);
    }
    html.dark .rc-btn.temp {
      background: linear-gradient(160deg, #4a5568 0%, #353d4a 100%);
      color: #eceff4;
    }

    .outline-btn-wrap { text-align: center; margin: 1rem 0 0.25rem; }
    .outline-btn {
      padding: 10px 22px;
      border-radius: 999px;
      border: 1.5px solid var(--ui-cool);
      color: var(--ui-cool);
      background: rgba(30, 136, 229, 0.06);
      cursor: pointer;
      font-size: 0.85rem;
      font-weight: 600;
      font-family: inherit;
      transition: background 0.2s ease, transform 0.12s ease;
    }
    html.dark .outline-btn {
      border-color: #64b5f6;
      color: #90caf9;
      background: rgba(100, 181, 246, 0.08);
    }
    .outline-btn:hover {
      background: rgba(30, 136, 229, 0.12);
      transform: translateY(-1px);
    }
    .outline-btn:active { transform: translateY(0); }

    #banner-toast {
      position: fixed;
      left: 50%;
      bottom: 24px;
      transform: translateX(-50%);
      min-width: 280px;
      max-width: 92vw;
      padding: 14px 18px;
      border-radius: 12px;
      color: #fff;
      font-size: 0.86rem;
      line-height: 1.45;
      z-index: 9999;
      display: none;
      align-items: flex-start;
      justify-content: space-between;
      gap: 14px;
      backdrop-filter: blur(8px);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.22);
    }
    #banner-toast.show { display: flex; }
    #banner-toast.success {
      background: linear-gradient(135deg, rgba(46, 125, 50, 0.95) 0%, rgba(27, 94, 32, 0.98) 100%);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    #banner-toast.error {
      background: linear-gradient(135deg, rgba(198, 40, 40, 0.95) 0%, rgba(142, 28, 28, 0.98) 100%);
      border: 1px solid rgba(255, 255, 255, 0.12);
    }
    #banner-toast .toast-close {
      flex-shrink: 0;
      background: rgba(255, 255, 255, 0.15);
      border: none;
      border-radius: 8px;
      color: inherit;
      cursor: pointer;
      font-size: 1.1rem;
      line-height: 1;
      width: 32px;
      height: 32px;
      opacity: 0.95;
    }

    footer {
      margin-top: 28px;
      padding-top: 20px;
      border-top: 1px solid var(--ui-stroke);
      font-size: 0.74rem;
      text-align: center;
      opacity: 0.78;
      line-height: 1.65;
    }
    footer a {
      color: inherit;
      text-decoration: none;
      border-bottom: 1px solid transparent;
      transition: border-color 0.2s ease;
    }
    footer a:hover { border-bottom-color: var(--ui-cool); }
    footer .links { margin-top: 8px; }
    footer .links a {
      display: inline-block;
      margin: 0 8px;
      padding: 4px 0;
    }

    .rc-only .page-shell { padding: 24px 20px; }
    .rc-only h1 {
      font-size: 1.35rem;
      font-weight: 700;
      text-align: center;
      margin: 0 0 8px;
    }
    .rc-only .rc-hint {
      text-align: center;
      font-size: 0.82rem;
      opacity: 0.85;
      line-height: 1.6;
      margin-bottom: 16px;
      padding: 0 8px;
    }
    .subpanel-banner {
      text-align: center;
      font-size: 0.95rem;
      font-weight: 600;
      margin: 0 0 10px;
      padding: 10px 12px;
      border-radius: 12px;
      background: rgba(30, 136, 229, 0.08);
      color: var(--ui-ink);
      line-height: 1.5;
    }
    html.dark .subpanel-banner {
      background: rgba(100, 181, 246, 0.12);
    }

    /* 独立遥控器 · 液晶状态 */
    .sub-lcd-stack {
      margin: 0 auto 12px;
      max-width: 220px;
    }
    .sub-lcd-panel {
      min-height: 5.5rem;
      display: flex;
      flex-direction: column;
      align-items: stretch;
      justify-content: center;
    }
    .sub-lcd-panel.sub-lcd-panel--powered .sub-lcd-standby {
      display: none;
    }
    .sub-lcd-panel:not(.sub-lcd-panel--powered) .sub-lcd-running {
      display: none;
    }
    .sub-lcd-line {
      margin: 0;
      font-size: 0.8rem;
      font-weight: 500;
      letter-spacing: 0.02em;
      text-align: center;
      color: rgba(210, 228, 248, 0.95);
      text-shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
    }
    .sub-lcd-panel--powered.sub-lcd-panel--chill .sub-lcd-line {
      color: rgba(185, 230, 255, 0.96);
      text-shadow: 0 0 10px rgba(120, 200, 255, 0.25), 0 1px 3px rgba(0, 0, 0, 0.4);
    }
    .sub-lcd-panel--powered.sub-lcd-panel--warm .sub-lcd-line {
      color: rgba(255, 224, 195, 0.96);
      text-shadow: 0 0 10px rgba(255, 180, 120, 0.2), 0 1px 3px rgba(0, 0, 0, 0.4);
    }
    .sub-lcd-temp {
      font-size: 1.85rem;
      margin: 6px 0 0;
      text-align: center;
    }
    .sub-lcd-standby {
      text-align: center;
      padding: 6px 4px;
    }
    .sub-lcd-standby-title {
      margin: 0 0 8px;
      font-size: 0.95rem;
      font-weight: 600;
      color: rgba(200, 212, 228, 0.92);
      text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    }
    .sub-lcd-standby-set {
      margin: 0;
      font-size: 0.82rem;
      color: rgba(175, 190, 210, 0.88);
    }

    .hidden { display: none !important; }

    @media (max-width: 380px) {
      .page-shell { padding: 20px 14px 24px; }
      .wind-wrap { gap: 2rem; }
    }