.timeline-window {
    position: fixed;
    display: flex;
    flex-direction: column;
    z-index: 10005;
    left: 120px;
    top: 80px;
    width: 1000px;
    height: 650px;
    background: #ffffff;
    border: 1px solid #999;
    border-radius: 6px;
    overflow: hidden;
}

.timeline-window .timeline-content {
    display: grid;
    grid-template-columns: 240px 320px 1fr;
    height: calc(100% - 36px);
    gap: 0;
}

.timeline-project-panel,
.timeline-input-panel,
.timeline-list-panel {
    padding: 12px;
    background: #f0f0f0;
    border-top: 1px solid #d3d3d3;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.timeline-project-panel {
    border-right: 1px solid #d3d3d3;
}

.timeline-input-panel {
    border-right: 1px solid #d3d3d3;
}

.timeline-list-panel {
    overflow-y: auto;
}

.timeline-project-panel h3,
.timeline-input-panel h3,
.timeline-list-panel h3 {
    margin: 0 0 12px;
    font-size: 14px;
    color: #333;
    font-weight: 600;
    flex-shrink: 0;
}

.project-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    overflow-y: auto;
    padding-right: 2px;
}

.project-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid #c0c0c0;
    background: #fff;
    border-radius: 4px;
    padding: 8px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    font-size: 12px;
}

.project-item.selected {
    border-color: #0078d4;
    background: #e8f0fe;
}

.project-item:hover {
    background: #f5f5f5;
}

.project-item span {
    flex: 1;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.timeline-view {
    position: relative;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    padding: 20px 16px;
}

.timeline-line {
    position: absolute;
    left: 36px;
    top: 20px;
    bottom: 20px;
    width: 2px;
    background: #0078d4;
}

.timeline-item {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 0;
}

.timeline-item:not(:last-child) {
    margin-bottom: 18px;
}

.timeline-item-marker {
    position: relative;
    width: 24px;
    min-width: 24px;
    display: flex;
    justify-content: center;
}

.timeline-item-marker::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid #0078d4;
    box-shadow: 0 0 0 4px rgba(0, 120, 212, 0.08);
}

.timeline-item-card {
    flex: 1;
    background: #fff;
    border: 1px solid #d3d3d3;
    border-radius: 6px;
    padding: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.timeline-item-date {
    font-size: 11px;
    color: #0078d4;
    font-weight: 600;
    margin-bottom: 6px;
}

.timeline-item-title {
    margin: 0 0 6px;
    font-size: 13px;
    font-weight: 700;
    color: #333;
}

.timeline-item-desc {
    margin: 0;
    color: #555;
    font-size: 12px;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
}

.timeline-field {
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.timeline-field label {
    font-size: 12px;
    color: #666;
}

.timeline-field input,
.timeline-field textarea {
    width: 100%;
    border: 1px solid #c0c0c0;
    border-radius: 2px;
    padding: 6px 8px;
    font-size: 12px;
    color: #333;
    background: #fff;
    font-family: Arial, sans-serif;
    resize: vertical;
    box-sizing: border-box;
}

.timeline-field textarea {
    height: 60px;
}

.timeline-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    margin-top: 10px;
}

.timeline-btn {
    padding: 6px 8px;
    border: 1px solid #999;
    border-radius: 2px;
    background: #e8e8e8;
    color: #000;
    cursor: pointer;
    font-size: 12px;
    transition: background 0.15s;
}

.timeline-btn:hover {
    background: #dfdfdf;
}

.timeline-btn:active {
    background: #c0c0c0;
}

.timeline-btn.primary {
    background: #0078d4;
    color: #fff;
    border-color: #0078d4;
}

.timeline-btn.primary:hover {
    background: #106ebe;
}

.timeline-btn.danger {
    background: #e81b23;
    color: #fff;
    border-color: #e81b23;
}

.timeline-btn.danger:hover {
    background: #d81b1f;
}

.timeline-card {
    background: #fff;
    border: 1px solid #d3d3d3;
    border-radius: 4px;
    padding: 10px;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 8px;
}

.timeline-card-body {
    flex: 1;
    min-width: 0;
}

.timeline-card-title {
    margin: 0 0 4px;
    font-size: 13px;
    font-weight: 600;
    color: #333;
}

.timeline-card-date {
    font-size: 11px;
    color: #0078d4;
    font-weight: 500;
    margin-bottom: 4px;
}

.timeline-card-desc {
    margin: 0;
    color: #666;
    font-size: 12px;
    line-height: 1.4;
    word-wrap: break-word;
}

.timeline-card-actions {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.timeline-card-btn {
    padding: 4px 6px;
    border: 1px solid #999;
    background: #e8e8e8;
    color: #000;
    cursor: pointer;
    font-size: 11px;
    border-radius: 2px;
    transition: background 0.15s;
}

.timeline-card-btn:hover {
    background: #dfdfdf;
}

.timeline-card-btn.edit {
    background: #0078d4;
    color: #fff;
    border-color: #0078d4;
}

.timeline-card-btn.edit:hover {
    background: #106ebe;
}

.timeline-card-btn.delete {
    background: #e81b23;
    color: #fff;
    border-color: #e81b23;
}

.timeline-card-btn.delete:hover {
    background: #d81b1f;
}

.timeline-empty {
    color: #999;
    padding: 20px;
    text-align: center;
    border: 1px dashed #d3d3d3;
    border-radius: 4px;
    background: #fafafa;
    font-size: 12px;
}

.timeline-icon .icon::before {
    content: '🕗';
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    font-size: 32px;
}

/* ===== 移动端适配 ===== */

/* 平板和手机屏幕 - 768px 及以下 */
@media (max-width: 768px) {
  /* 窗口全屏显示 */
  .timeline-window {
    position: fixed;
    width: 100% !important;
    height: 100% !important;
    left: 0 !important;
    top: 0 !important;
    max-width: 100vw;
    max-height: 100vh;
    border-radius: 0;
    transform: none !important;
    z-index: 10005;
  }

  .timeline-window.minimized {
    display: none !important;
  }

  /* 内容区域改为单列布局 */
  .timeline-window .timeline-content {
    display: flex;
    flex-direction: column;
    grid-template-columns: none;
    height: calc(100% - 36px);
    gap: 0;
  }

  /* 项目面板放在最上面 */
  .timeline-project-panel {
    border-right: none;
    border-bottom: 1px solid #d3d3d3;
    max-height: 120px;
    padding: 8px;
    flex-shrink: 0;
  }

  .timeline-project-panel h3 {
    margin: 0 0 8px;
    font-size: 12px;
  }

  .project-list {
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 0 6px;
    gap: 8px;
    padding-right: 8px;
  }

  .project-item {
    flex-shrink: 0;
    min-width: 120px;
    padding: 6px;
    font-size: 11px;
  }

  .project-item span {
    white-space: normal;
  }

  /* 输入面板改为紧凑型 */
  .timeline-input-panel {
    border-right: none;
    border-bottom: 1px solid #d3d3d3;
    padding: 8px;
    flex-shrink: 0;
  }

  .timeline-input-panel h3 {
    margin: 0 0 8px;
    font-size: 12px;
  }

  .timeline-field {
    margin-bottom: 6px;
  }

  .timeline-field label {
    font-size: 11px;
    margin-bottom: 2px;
  }

  .timeline-field input,
  .timeline-field textarea {
    padding: 4px 6px;
    font-size: 12px;
  }

  .timeline-field textarea {
    height: 50px;
  }

  /* 按钮改为两列 */
  .timeline-actions {
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
    margin-top: 8px;
  }

  .timeline-btn {
    padding: 5px 6px;
    font-size: 11px;
  }

  /* 时间线列表面板占满剩余空间 */
  .timeline-list-panel {
    flex: 1;
    border-right: none;
    overflow-y: auto;
    padding: 8px;
    min-height: 0;
  }

  .timeline-list-panel h3 {
    margin: 0 0 8px;
    font-size: 12px;
  }

  /* 时间线视图优化 */
  .timeline-view {
    padding: 12px 8px;
  }

  /* 隐藏竖直时间线 */
  .timeline-line {
    display: none;
  }

  /* 时间线项目显示为卡片 */
  .timeline-item {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 0;
  }

  .timeline-item:not(:last-child) {
    margin-bottom: 12px;
  }

  /* 标记点隐藏 */
  .timeline-item-marker {
    display: none;
  }

  /* 卡片全宽显示 */
  .timeline-item-card {
    flex: 1;
    width: 100%;
  }

  /* 标题栏调整 */
  .timeline-window .window-titlebar {
    padding: 2px 4px;
    height: 36px;
  }

  .timeline-window .window-title {
    font-size: 12px;
  }

  .timeline-window .window-controls button {
    width: 16px;
    height: 16px;
    font-size: 11px;
  }

  /* 历史卡片布局调整 */
  .timeline-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .timeline-card-btn {
    flex: 1;
    font-size: 10px;
    padding: 5px 8px;
  }

  /* 空状态 */
  .timeline-empty {
    font-size: 11px;
    padding: 15px;
  }

  /* 横屏模式优化 (max-height: 500px) */
  @media (orientation: landscape) and (max-height: 500px) {
    .timeline-project-panel {
      max-height: 80px;
    }

    .timeline-input-panel {
      max-height: 150px;
    }

    .project-item {
      min-width: 100px;
      padding: 4px;
      font-size: 10px;
    }

    .timeline-field textarea {
      height: 40px;
    }

    .timeline-actions {
      grid-template-columns: repeat(2, 1fr);
    }

    .timeline-btn {
      padding: 4px;
      font-size: 10px;
    }
  }

  /* 竖屏模式优化 */
  @media (orientation: portrait) {
    .timeline-project-panel {
      max-height: 140px;
    }

    .timeline-field textarea {
      height: 60px;
    }
  }
}

/* 手机屏幕 - 480px 及以下 */
@media (max-width: 480px) {
  .timeline-project-panel {
    max-height: 100px;
    padding: 6px;
  }

  .project-item {
    min-width: 100px;
    font-size: 10px;
    padding: 4px;
  }

  .timeline-input-panel {
    padding: 6px;
  }

  .timeline-field label {
    font-size: 10px;
  }

  .timeline-field input,
  .timeline-field textarea {
    padding: 4px;
    font-size: 11px;
  }

  .timeline-field textarea {
    height: 45px;
  }

  .timeline-actions {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .timeline-btn {
    padding: 6px;
    font-size: 11px;
    width: 100%;
  }

  .timeline-view {
    padding: 8px 4px;
  }

  .timeline-item-card {
    padding: 8px;
  }

  .timeline-item-title {
    font-size: 12px;
  }

  .timeline-item-date {
    font-size: 10px;
  }

  .timeline-item-desc {
    font-size: 11px;
  }

  .timeline-card-actions {
    gap: 3px;
  }

  .timeline-card-btn {
    padding: 4px 6px;
    font-size: 10px;
  }

  .timeline-window .window-title {
    font-size: 11px;
  }

  .timeline-window .window-controls button {
    width: 14px;
    height: 14px;
    font-size: 10px;
  }
}