/* achievements.css — 成就系统样式 */
    /* ════════════════════════════════════════
       成就系统样式
    ════════════════════════════════════════ */

    .achievement-toggle-btn {
      position: fixed;
      top: 20px;
      right: 136px;
      z-index: 100;
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
      border: 2px solid #fff;
      color: #fff;
      font-size: 1.2rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
      transition: all 0.3s ease;
    }

    .achievement-toggle-btn:hover {
      transform: scale(1.1);
      box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
    }

    .achievement-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.5);
      z-index: 200;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }

    .achievement-overlay.show {
      opacity: 1;
      pointer-events: auto;
    }

    .achievement-panel {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: #fff;
      border-radius: 24px 24px 0 0;
      z-index: 210;
      max-height: 80vh;
      overflow-y: auto;
      transform: translateY(100%);
      transition: transform 0.3s ease;
    }

    .achievement-panel.open {
      transform: translateY(0);
    }

    .achievement-panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 24px;
      border-bottom: 1px solid #eee;
      position: sticky;
      top: 0;
      background: #fff;
    }

    .achievement-panel-header h3 {
      font-size: 1.2rem;
      margin: 0;
    }

    .achievement-panel-close {
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: #999;
    }

    .achievement-content {
      padding: 24px;
    }

    .achievement-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-bottom: 24px;
    }

    .achievement-stat {
      text-align: center;
      padding: 16px;
      background: #f5f5f5;
      border-radius: 8px;
    }

    .achievement-stat-value {
      font-size: 1.8rem;
      font-weight: bold;
      color: #f39c12;
      margin-bottom: 4px;
    }

    .achievement-stat-label {
      font-size: 0.8rem;
      color: #999;
    }

    .achievement-progress-bar {
      width: 100%;
      height: 8px;
      background: #eee;
      border-radius: 4px;
      overflow: hidden;
      margin-bottom: 24px;
    }

    .achievement-progress-fill {
      height: 100%;
      background: linear-gradient(90deg, #f39c12 0%, #e67e22 100%);
      transition: width 0.3s ease;
    }

    .achievement-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
      gap: 12px;
    }

    .achievement-item {
      border: 2px solid #ddd;
      border-radius: 8px;
      padding: 12px;
      text-align: center;
      transition: all 0.3s ease;
      background: #f9f9f9;
    }

    .achievement-item.unlocked {
      border-color: #f39c12;
      background: #fffbf0;
    }

    .achievement-item:hover {
      transform: translateY(-4px);
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    }

    .achievement-item-icon {
      font-size: 2rem;
      margin-bottom: 8px;
    }

    .achievement-item-name {
      font-size: 0.85rem;
      font-weight: bold;
      margin-bottom: 4px;
      color: #333;
    }

    .achievement-item-desc {
      font-size: 0.7rem;
      color: #999;
      margin-bottom: 8px;
      line-height: 1.3;
    }

    .achievement-item-date {
      font-size: 0.65rem;
      color: #f39c12;
    }

    .achievement-item-locked {
      font-size: 0.7rem;
      color: #999;
    }

    .achievement-empty {
      text-align: center;
      padding: 60px 24px;
      color: #999;
    }


    /* 移动端适配 */
    @media (max-width: 480px) {
      .achievement-item { padding: 10px; }
      .achievement-item-icon { font-size: 1.5rem; }
      .achievement-item-name { font-size: 0.75rem; }
      .achievement-item-desc { font-size: 0.65rem; }
      .achievement-item-date,
      .achievement-item-locked { font-size: 0.6rem; }
      .achievement-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); gap: 8px; }
    }