/* SpeakFlow Studio — 共享控件样式（ui-kit）。
   唯一依据：docs/studio-design-system.md §1–§5。
   令牌来自 static/studio/design.css（Astra），本文件不复制令牌定义，只新增 4 个状态色令牌。
   本文件只写"控件"，不写页面布局；页面布局写在 product.css。 */

/* ------------------------------------------------------------------ *
 * 0. SpeakFlow 新增状态色令牌（design-system §1）
 * ------------------------------------------------------------------ */
@layer tokens {
  :root {
    --sf-warn: #a2660a;
    --sf-warn-soft: #fdf3e2;
    --sf-danger: #b3261e;
    --sf-danger-soft: #fdecea;
    --sf-focus: #7297ff;
  }
}

@layer components {
  /* ---------------------------------------------------------------- *
   * 1. 全局收敛规则：讲述与播放期间禁止悬停位移（design-system §0.4、§5）
   *    页面只要给容器加 .sf-still，Astra 默认的 translateY(-2px) 立即失效。
   * ---------------------------------------------------------------- */
  .sf-still, .sf-still *, .sf-player *, .sf-player *::before, .sf-player *::after {
    transition-property: background-color, border-color, color, opacity, outline-color;
  }
  .sf-still .button:hover, .sf-player .button:hover { transform: none; }

  /* ---------------------------------------------------------------- *
   * 2. 中文 eyebrow（§2：标签只用中文任务名，不写英文标语）
   * ---------------------------------------------------------------- */
  .sf-eyebrow-cn {
    display: inline-block;
    font-size: 10px;
    font-weight: 650;
    letter-spacing: 0.17em;
    line-height: 1.6;
    color: var(--blue);
  }

  /* ---------------------------------------------------------------- *
   * 3. 载入指示：低调旋转环（§5：禁止用不确定动画冒充真实百分比）
   * ---------------------------------------------------------------- */
  .sf-spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    flex: none;
    border-radius: 50%;
    border: 2px solid currentColor;
    border-top-color: transparent;
    opacity: 0.7;
    animation: sf-spin 700ms linear infinite;
    vertical-align: -2px;
  }
  @keyframes sf-spin {
    to { transform: rotate(360deg); }
  }

  /* ================================================================== *
   * 4.3 滑动开关 .sf-switch
   * 结构：<label class="sf-switch"><input type="checkbox" role="switch">
   *       <span class="sf-switch-track"><span class="sf-switch-thumb"></span></span>
   *       <span class="sf-switch-text">…</span></label>
   * 底层 input 保留，空格键 / 触摸 / 表单语义全部原生可用。
   * ================================================================== */
  .sf-switch-field {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .sf-switch {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-height: 34px;
    font-size: 14px;
    color: var(--ink);
    cursor: pointer;
  }
  /* 隐藏原生 checkbox，但保留可聚焦性与表单语义（不使用 appearance:none 重绘） */
  .sf-switch > input[type="checkbox"] {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: 0;
    padding: 0;
    opacity: 0;
    pointer-events: none;
  }
  .sf-switch-track {
    position: relative;
    display: block;
    flex: none;
    width: 44px;
    height: 26px;
    border-radius: 999px;
    background: #dde4f0;
    transition: background-color var(--fast) var(--ease);
  }
  .sf-switch-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #fff;
    border: 1px solid #cfd8e8;
    transition:
      transform var(--fast) var(--ease),
      border-color var(--fast) var(--ease);
  }
  .sf-switch-text { line-height: 1.5; }

  /* 开 / 关 */
  .sf-switch > input:checked + .sf-switch-track { background: var(--blue); }
  .sf-switch > input:checked + .sf-switch-track .sf-switch-thumb {
    transform: translateX(18px);
    border-color: transparent;
  }
  /* hover：仅颜色，160ms */
  .sf-switch:hover > .sf-switch-track { background: #ccd7ea; }
  .sf-switch:hover > input:checked + .sf-switch-track { background: var(--blue-dark); }
  /* pressed：滑块 scale(.94)，120ms */
  .sf-switch:active > .sf-switch-track .sf-switch-thumb { transform: scale(0.94); }
  .sf-switch:active > input:checked + .sf-switch-track .sf-switch-thumb {
    transform: translateX(18px) scale(0.94);
  }
  /* focus-visible：焦点环在轨道外 */
  .sf-switch > input:focus-visible + .sf-switch-track {
    outline: 3px solid var(--sf-focus);
    outline-offset: 3px;
  }
  /* disabled：变灰且不可用 */
  .sf-switch.is-disabled,
  .sf-switch > input:disabled { cursor: not-allowed; }
  .sf-switch.is-disabled > .sf-switch-text,
  .sf-switch > input:disabled ~ .sf-switch-text { color: var(--muted); }
  .sf-switch > input:disabled + .sf-switch-track {
    background: #eef1f7;
    opacity: 0.6;
  }
  .sf-switch > input:disabled + .sf-switch-track .sf-switch-thumb {
    background: #f4f6fb;
    border-color: #dfe4ee;
  }
  /* loading：开关保持当前值，只在右侧出现 spinner（由 .sf-switch.is-loading 承载） */
  .sf-switch.is-loading { cursor: progress; }
  .sf-switch.is-loading .sf-switch-track { opacity: 0.75; }

  /* disabled 的原因与去处：默认隐藏，禁用时随开关一起出现 */
  .sf-switch-note {
    display: none;
    margin: 0;
    font-size: 12px;
    line-height: 1.7;
    color: var(--muted);
    max-width: 320px;
  }
  .sf-switch-field:has(.sf-switch.is-disabled) .sf-switch-note,
  .sf-switch.is-disabled + .sf-switch-note,
  .sf-switch:has(> input:disabled) + .sf-switch-note {
    display: block;
  }

  /* ================================================================== *
   * 4.4 分段选择 .sf-segmented（容器高度固定，切换不引起周围布局跳动）
   * ================================================================== */
  .sf-segmented {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    box-sizing: border-box;
    min-width: 0;
    height: 40px;
    padding: 4px;
    background: var(--blue-soft);
    border-radius: var(--radius-sm);
    max-width: 100%;
  }
  .sf-segmented__item {
    flex: 1 1 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 32px;
    min-width: 0;
    padding: 0 16px;
    border: 0;
    border-radius: 7px;
    background: transparent;
    color: var(--muted);
    font-size: 13px;
    font-weight: 550;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition:
      background-color var(--fast) var(--ease),
      color var(--fast) var(--ease),
      box-shadow var(--fast) var(--ease);
  }
  .sf-segmented__item:hover:not([aria-disabled="true"]) {
    background: #dbe4ff;
    color: var(--ink);
  }
  .sf-segmented__item[aria-checked="true"] {
    background: #fff;
    color: var(--blue);
    box-shadow: 0 2px 8px #1a387014;
  }
  .sf-segmented__item:active:not([aria-disabled="true"]) {
    background: #d3deff;
  }
  .sf-segmented__item[aria-checked="true"]:active {
    background: #fff;
  }
  .sf-segmented__item:focus-visible {
    outline: 3px solid var(--sf-focus);
    outline-offset: 2px;
  }
  .sf-segmented__item[aria-disabled="true"] {
    opacity: 0.45;
    cursor: not-allowed;
  }

  /* ================================================================== *
   * 4.5 步进 / 档位 .sf-stepper（边界禁用但不隐藏）
   * ================================================================== */
  .sf-stepper {
    display: inline-flex;
    align-items: stretch;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: #fff;
    overflow: hidden;
  }
  .sf-stepper__btn {
    width: 40px;
    display: grid;
    place-items: center;
    border: 0;
    background: transparent;
    color: var(--muted);
    font-size: 17px;
    line-height: 1;
    transition:
      background-color var(--fast) var(--ease),
      color var(--fast) var(--ease);
  }
  .sf-stepper__btn:hover:not([aria-disabled="true"]) {
    background: var(--canvas);
    color: var(--blue);
  }
  .sf-stepper__btn:active:not([aria-disabled="true"]) { background: var(--blue-soft); }
  .sf-stepper__btn:focus-visible {
    outline: 3px solid var(--sf-focus);
    outline-offset: -3px;
  }
  .sf-stepper__btn[aria-disabled="true"] {
    opacity: 0.45;
    cursor: not-allowed;
  }
  .sf-stepper__value {
    min-width: 68px;
    display: grid;
    place-items: center;
    padding: 0 6px;
    border-inline: 1px solid var(--line);
    font-size: 14px;
    font-variant-numeric: tabular-nums;
    color: var(--ink);
  }

  /* ================================================================== *
   * 4.6 内容卡 .sf-item-card（选择材料用）
   * ================================================================== */
  .sf-item-card {
    position: relative;
    display: grid;
    gap: 10px;
    width: 100%;
    min-width: 0;
    padding: 14px 14px 14px 17px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    color: var(--ink);
    text-align: left;
    transition:
      border-color var(--fast) var(--ease),
      background-color var(--fast) var(--ease);
  }
  .sf-item-card:hover:not([aria-disabled="true"]) { border-color: #c8d7ff; }
  .sf-item-card:focus-visible {
    outline: 3px solid var(--sf-focus);
    outline-offset: 3px;
  }
  .sf-item-card__thumb {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: contain;
    background: var(--canvas);
    border-radius: var(--radius-sm);
  }
  .sf-item-card__fallback {
    display: grid;
    place-items: center;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #eef2fa;
    border: 1px dashed #cfd9ee;
    border-radius: var(--radius-sm);
    color: var(--muted);
    font-size: 12px;
  }
  .sf-item-card__name {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.5;
    overflow-wrap: anywhere;
  }
  .sf-item-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 12px;
    font-size: 12px;
    color: var(--muted);
  }
  .sf-item-card__status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--ink);
  }
  .sf-item-card__note { font-size: 12px; color: var(--muted); }
  /* selected：蓝底 + 蓝描边 + 左侧 3px 竖条（左侧内衬已预留，切换不跳动） */
  .sf-item-card[aria-pressed="true"] {
    background: var(--blue-soft);
    border-color: #c5d4ff;
  }
  .sf-item-card[aria-pressed="true"]::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--blue);
  }
  .sf-item-card[aria-disabled="true"] {
    background: #fbfcfe;
    color: var(--muted);
    cursor: not-allowed;
  }
  .sf-item-card[aria-disabled="true"] .sf-item-card__thumb,
  .sf-item-card[aria-disabled="true"] .sf-item-card__fallback { opacity: 0.55; }
  .sf-item-card[aria-disabled="true"] .sf-item-card__note { color: var(--sf-danger); }

  /* ================================================================== *
   * 4.7 轻量选择面板 .sf-sheet（页面内可展开区域，不是 dialog）
   * ================================================================== */
  .sf-sheet {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    overflow: hidden;
  }
  .sf-sheet__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
    padding: 18px 22px;
    border: 0;
    background: transparent;
    color: var(--ink);
    text-align: left;
  }
  .sf-sheet__head:focus-visible {
    outline: 3px solid var(--sf-focus);
    outline-offset: -3px;
  }
  .sf-sheet__title {
    font-size: 16px;
    font-weight: 600;
    overflow-wrap: anywhere;
  }
  .sf-sheet__hint {
    display: block;
    font-size: 12px;
    font-weight: 400;
    color: var(--muted);
    margin-top: 3px;
  }
  .sf-sheet__caret {
    flex: none;
    font-size: 13px;
    color: var(--muted);
    transition: transform 240ms var(--ease);
  }
  .sf-sheet[aria-expanded="true"] .sf-sheet__caret { transform: rotate(180deg); }
  .sf-sheet__panel {
    padding: 0 22px 22px;
    display: grid;
    gap: 12px;
    animation: sf-panel-in 240ms var(--ease) both;
  }
  .sf-sheet[aria-expanded="false"] .sf-sheet__panel { display: none; }
  .sf-sheet.is-selected { border-color: #c5d4ff; background: var(--blue-soft); }
  .sf-sheet.is-selected .sf-sheet__title::after {
    content: "已选";
    display: inline-block;
    margin-left: 10px;
    padding: 2px 9px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid #c5d4ff;
    color: var(--blue);
    font-size: 11px;
    font-weight: 600;
  }
  @keyframes sf-panel-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* ================================================================== *
   * 4.8 缩略图浏览器 .sf-thumbs
   * ================================================================== */
  .sf-thumbs {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
    gap: 12px;
    max-height: min(46vh, 420px);
    overflow: auto;
    padding: 2px;
  }
  .sf-thumbs__item {
    display: grid;
    gap: 7px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: #fff;
    color: var(--ink);
    text-align: left;
    min-width: 0;
    transition:
      border-color var(--fast) var(--ease),
      background-color var(--fast) var(--ease);
  }
  .sf-thumbs__item:hover { border-color: #c8d7ff; }
  .sf-thumbs__item:focus-visible {
    outline: 3px solid var(--sf-focus);
    outline-offset: 2px;
  }
  .sf-thumbs__img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: contain;
    background: var(--canvas);
    border-radius: 6px;
  }
  .sf-thumbs__fallback {
    display: grid;
    place-items: center;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #eef2fa;
    border: 1px dashed #cfd9ee;
    border-radius: 6px;
    color: var(--muted);
    font-size: 11px;
  }
  .sf-thumbs__meta {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    font-size: 11px;
    color: var(--muted);
    min-width: 0;
  }
  .sf-thumbs__title {
    font-weight: 600;
    color: var(--ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
  }
  .sf-thumbs__page {
    flex: none;
    font-variant-numeric: tabular-nums;
  }
  .sf-thumbs__flag {
    font-size: 10px;
    color: var(--blue);
    background: var(--blue-soft);
    border-radius: 4px;
    padding: 1px 6px;
  }
  .sf-thumbs__item[aria-current="true"] {
    border-color: var(--blue);
    background: var(--blue-soft);
  }
  .sf-thumbs-more {
    grid-column: 1 / -1;
    justify-self: start;
    padding: 11px 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: #fff;
    color: var(--blue);
    font-size: 13px;
    font-weight: 550;
    transition: border-color var(--fast) var(--ease), background-color var(--fast) var(--ease);
  }
  .sf-thumbs-more:hover { background: var(--canvas); border-color: #c4d1f0; }
  .sf-thumbs-more:focus-visible {
    outline: 3px solid var(--sf-focus);
    outline-offset: 2px;
  }

  /* ================================================================== *
   * 4.9 状态面板 .sf-state（颜色永远不是唯一信号：形状 + 文字都变）
   * ================================================================== */
  .sf-state {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--canvas);
  }
  .sf-state__dot {
    position: relative;
    flex: none;
    width: 12px;
    height: 12px;
    margin-top: 5px;
  }
  .sf-state__dot::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
  }
  .sf-state__body { display: grid; gap: 6px; min-width: 0; }
  .sf-state__title {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
  }
  .sf-state__icon {
    display: inline-flex;
    align-items: center;
    padding: 2px 9px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: 11px;
    font-weight: 650;
    letter-spacing: 0.02em;
  }
  .sf-state__text {
    font-size: 13px;
    line-height: 1.75;
    color: var(--muted);
    overflow-wrap: anywhere;
  }
  .sf-state__action { margin-top: 4px; }

  /* 五种形状：实心圆 / 半环 / 三角 / 方块 / 圆环 */
  .sf-state.is-ok .sf-state__dot::after {
    width: 9px; height: 9px; border-radius: 50%; background: var(--green);
  }
  .sf-state.is-busy .sf-state__dot::after {
    width: 11px; height: 11px; border-radius: 50%;
    border: 2px solid var(--blue); border-right-color: transparent;
  }
  .sf-state.is-warn .sf-state__dot::after {
    width: 0; height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 10px solid var(--sf-warn);
  }
  .sf-state.is-danger .sf-state__dot::after {
    width: 9px; height: 9px; background: var(--sf-danger);
  }
  .sf-state.is-new .sf-state__dot::after {
    width: 11px; height: 11px; border-radius: 50%; border: 2px solid var(--blue);
  }

  .sf-state.is-ok { background: #eef7f3; border-color: #cfe6de; }
  .sf-state.is-busy { background: var(--blue-soft); border-color: #c5d4ff; }
  .sf-state.is-warn { background: var(--sf-warn-soft); border-color: #f0dcb4; }
  .sf-state.is-danger { background: var(--sf-danger-soft); border-color: #f0c4c0; }

  .sf-state.is-ok .sf-state__icon { background: #fff; border-color: #cfe6de; color: var(--green); }
  .sf-state.is-busy .sf-state__icon { background: #fff; border-color: #c5d4ff; color: var(--blue); }
  .sf-state.is-warn .sf-state__icon { background: #fff; border-color: #f0dcb4; color: var(--sf-warn); }
  .sf-state.is-danger .sf-state__icon { background: #fff; border-color: #f0c4c0; color: var(--sf-danger); }
  .sf-state.is-new .sf-state__icon { background: #fff; border-color: var(--line); color: var(--blue); }

  /* ================================================================== *
   * 4.10 媒体播放器 .sf-player（内部禁止任何 hover 位移 / 缩放）
   * ================================================================== */
  .sf-player {
    display: block;
    width: 100%;
    min-width: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    overflow: hidden;
  }
  .sf-player:fullscreen {
    border: 0;
    border-radius: 0;
    width: 100%;
    height: 100%;
  }
  .sf-player:fullscreen .sf-player__stage { aspect-ratio: auto; height: 100%; }
  .sf-player__stage {
    position: relative;
    display: grid;
    place-items: center;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--canvas);
    border: 0;
    padding: 0;
    cursor: pointer;
  }
  .sf-player__frame {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
  }
  .sf-player__fallback {
    display: grid;
    place-items: center;
    padding: 24px;
    text-align: center;
    font-size: 13px;
    color: var(--muted);
  }
  .sf-player__overlay {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    pointer-events: none;
  }
  /* 中心播放反馈：短暂出现，160ms 淡入淡出 */
  .sf-player__center {
    pointer-events: none;
    width: 64px;
    height: 64px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: 50%;
    background: #17233dcc;
    color: #fff;
    font-size: 21px;
    line-height: 1;
    opacity: 0;
    transition: opacity 160ms var(--ease);
  }
  .sf-player__center.is-showing {
    opacity: 1;
    pointer-events: auto;
  }
  .sf-player__center:focus-visible {
    opacity: 1;
    outline: 3px solid var(--sf-focus);
    outline-offset: 3px;
  }
  .sf-player__overlay-note {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 14px;
    margin: 0 auto;
    width: fit-content;
    max-width: 90%;
    padding: 7px 14px;
    border-radius: 999px;
    background: #17233dd9;
    color: #fff;
    font-size: 12px;
    text-align: center;
  }
  /* 控制带紧邻画面，不插入说明文字 */
  .sf-player__bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    row-gap: 10px;
    padding: 12px 16px;
    border-top: 1px solid var(--line);
    background: #fff;
  }
  .sf-player__btn {
    flex: none;
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: #fff;
    color: var(--ink);
    font-size: 14px;
    line-height: 1;
    transition:
      background-color var(--fast) var(--ease),
      border-color var(--fast) var(--ease),
      color var(--fast) var(--ease);
  }
  .sf-player__btn:hover:not(:disabled) {
    background: var(--canvas);
    border-color: #c4d1f0;
    color: var(--blue);
  }
  .sf-player__btn:active:not(:disabled) { background: var(--blue-soft); }
  .sf-player__btn:focus-visible {
    outline: 3px solid var(--sf-focus);
    outline-offset: 3px;
  }
  .sf-player__btn:disabled { opacity: 0.45; cursor: not-allowed; }
  .sf-player__btn--rate {
    width: auto;
    min-width: 52px;
    padding: 0 12px;
    border-radius: 999px;
    font-size: 12px;
    font-variant-numeric: tabular-nums;
  }
  .sf-player__btn[aria-pressed="true"] {
    background: var(--blue-soft);
    border-color: #c5d4ff;
    color: var(--blue);
  }
  /* 进度条：重绘 <input type="range">，轨道 / 已播填充 / 滑块 */
  .sf-player__seek {
    flex: 1 1 auto;
    min-width: 90px;
    height: 20px;
    margin: 0;
    padding: 0;
    background: transparent;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
  }
  .sf-player__seek:disabled { cursor: not-allowed; opacity: 0.5; }
  .sf-player__seek::-webkit-slider-runnable-track {
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(
      to right,
      var(--blue) var(--sf-seek, 0%),
      #e8eefb var(--sf-seek, 0%)
    );
  }
  .sf-player__seek::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    margin-top: -4px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--blue);
  }
  .sf-player__seek::-moz-range-track {
    height: 6px;
    border-radius: 3px;
    background: #e8eefb;
  }
  .sf-player__seek::-moz-range-progress {
    height: 6px;
    border-radius: 3px;
    background: var(--blue);
  }
  .sf-player__seek::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--blue);
  }
  .sf-player__seek:focus-visible {
    outline: 3px solid var(--sf-focus);
    outline-offset: 3px;
  }
  .sf-player__time {
    flex: none;
    font-family: var(--mono);
    font-size: 12px;
    font-variant-numeric: tabular-nums;
    color: var(--muted);
    white-space: nowrap;
  }
  .sf-player__meta {
    flex: 1 1 120px;
    min-width: 0;
    font-size: 12px;
    color: var(--muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .sf-player__volume {
    flex: none;
    width: 76px;
    height: 18px;
    margin: 0;
    background: transparent;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
  }
  .sf-player__volume:disabled { cursor: not-allowed; opacity: 0.45; }
  .sf-player__volume::-webkit-slider-runnable-track {
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(to right, #9db4f2 var(--sf-volume, 100%), #e8eefb var(--sf-volume, 100%));
  }
  .sf-player__volume::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    margin-top: -4px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--blue);
  }
  .sf-player__volume::-moz-range-track {
    height: 4px;
    border-radius: 2px;
    background: #e8eefb;
  }
  .sf-player__volume::-moz-range-progress {
    height: 4px;
    border-radius: 2px;
    background: #9db4f2;
  }
  .sf-player__volume::-moz-range-thumb {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--blue);
  }
  .sf-player__volume:focus-visible {
    outline: 3px solid var(--sf-focus);
    outline-offset: 3px;
  }

  /* ================================================================== *
   * 4.11 行动卡 .sf-action-card（第一层只表达一个重点）
   * ================================================================== */
  .sf-action-card {
    display: grid;
    gap: 14px;
    align-content: start;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
  }
  .sf-action-card__thumb {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: contain;
    background: var(--canvas);
    border-radius: var(--radius-sm);
  }
  .sf-action-card__fallback {
    display: grid;
    place-items: center;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #eef2fa;
    border: 1px dashed #cfd9ee;
    border-radius: var(--radius-sm);
    color: var(--muted);
    font-size: 12px;
  }
  .sf-action-card__title {
    font-size: 22px;
    font-weight: 650;
    letter-spacing: -0.04em;
    line-height: 1.35;
    overflow-wrap: anywhere;
  }
  .sf-action-card__evidence {
    font-size: 13px;
    line-height: 1.8;
    color: var(--muted);
    overflow-wrap: anywhere;
  }
  .sf-action-card__next {
    font-size: 14px;
    line-height: 1.75;
    padding-left: 12px;
    border-left: 3px solid var(--blue);
    overflow-wrap: anywhere;
  }
  .sf-action-card__foot {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    padding-top: 4px;
  }
  .sf-action-card__expand {
    display: none;
    border-top: 1px solid var(--line);
    padding-top: 14px;
    font-size: 13px;
    line-height: 1.85;
    color: var(--muted);
    overflow-wrap: anywhere;
  }
  .sf-action-card.is-expanded .sf-action-card__expand {
    display: block;
    animation: sf-panel-in 240ms var(--ease) both;
  }
  .sf-action-card__toggle {
    padding: 0;
    border: 0;
    background: none;
    color: var(--blue);
    font-size: 13px;
    font-weight: 550;
  }
  .sf-action-card__toggle:focus-visible {
    outline: 3px solid var(--sf-focus);
    outline-offset: 3px;
  }

  /* ================================================================== *
   * 4.12 指标图形 .sf-meter（缺失就是"不可评估"，不画空条）
   * ================================================================== */
  .sf-meter { display: grid; gap: 6px; min-width: 0; }
  .sf-meter__track {
    height: 8px;
    border-radius: 4px;
    background: #e8eefb;
    overflow: hidden;
  }
  .sf-meter__fill {
    display: block;
    height: 100%;
    border-radius: 4px;
    background: var(--blue);
    transition: width 240ms var(--ease);
  }
  .sf-meter__value {
    font-size: 13px;
    color: var(--ink);
    font-variant-numeric: tabular-nums;
  }
  .sf-meter__unit { color: var(--muted); margin-left: 4px; }
  .sf-meter__caption { font-size: 12px; color: var(--muted); }
  .sf-meter-row {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
  }
  .sf-meter-row > .sf-meter { flex: 1 1 auto; }
  /* 计划 / 实际两行对照：共用同一刻度，上灰（计划）下蓝（实际） */
  .sf-meter-pair { display: grid; gap: 10px; }
  .sf-meter-pair__row {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr) 84px;
    align-items: center;
    gap: 12px;
  }
  .sf-meter-pair__name { font-size: 12px; color: var(--muted); }
  .sf-meter--plan .sf-meter__fill { background: #b9c4dd; }
  .sf-meter-pair__scale {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    border-top: 1px dashed var(--line);
    padding-top: 6px;
  }
  /* 不可评估 */
  .sf-unknown {
    display: flex;
    align-items: baseline;
    gap: 8px;
    font-size: 13px;
    color: var(--muted);
  }
  .sf-unknown b {
    font-size: 20px;
    font-weight: 600;
    color: var(--muted);
    line-height: 1;
  }
  .sf-meter-group { display: grid; gap: 8px; }
  .sf-meter-group__name { font-size: 12px; color: var(--muted); }
}

/* ------------------------------------------------------------------ *
 * 5. 减少动态效果：过渡全部关闭，但静态反馈必须完整
 * ------------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  .sf-switch-track,
  .sf-switch-thumb,
  .sf-segmented__item,
  .sf-stepper__btn,
  .sf-item-card,
  .sf-thumbs__item,
  .sf-sheet__panel,
  .sf-action-card__expand,
  .sf-meter__fill,
  .sf-player__center,
  .sf-spinner {
    transition: none !important;
    animation: none !important;
  }
  .sf-sheet__caret { transform: none !important; }
  /* 展开的面板直接可见、中心反馈直接显示，不依赖动画 */
  .sf-sheet[aria-expanded="true"] .sf-sheet__panel { display: grid; opacity: 1; transform: none; }
  .sf-action-card.is-expanded .sf-action-card__expand { display: block; opacity: 1; transform: none; }
  .sf-player__center { opacity: 1; }
}