/* 加载动画 */
    #loading {
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100px;
      width: 100%;
      position: relative;
      overflow: hidden;
    }

    .loading-container {
      display: flex;
      align-items: flex-end;
      height: 60px;
    }

    .ball {
      width: 20px;
      height: 20px;
      border-radius: 50%;
      margin: 0 5px;
      animation: bounce 0.9s infinite alternate;
    }

    .ball:nth-child(1) {
      background: #FF5252;
      animation-delay: 0s;
    }

    .ball:nth-child(2) {
      background: #FFEB3B;
      animation-delay: 0.1s;
    }

    .ball:nth-child(3) {
      background: #4CAF50;
      animation-delay: 0.2s;
    }

    .ball:nth-child(4) {
      background: #2196F3;
      animation-delay: 0.3s;
    }

    .ball:nth-child(5) {
      background: #9C27B0;
      animation-delay: 0.4s;
    }

    .shadow {
      position: absolute;
      width: 20px;
      height: 4px;
      background: rgba(0, 0, 0, 0.2);
      border-radius: 50%;
      bottom: 0;
      transform: scaleX(1);
      filter: blur(1px);
      animation: shadow 0.9s infinite alternate;
    }

    .shadow:nth-child(6) {
      left: calc(50% - 55px);
      animation-delay: 0s;
    }

    .shadow:nth-child(7) {
      left: calc(50% - 30px);
      animation-delay: 0.1s;
    }

    .shadow:nth-child(8) {
      left: calc(50% - 5px);
      animation-delay: 0.2s;
    }

    .shadow:nth-child(9) {
      left: calc(50% + 20px);
      animation-delay: 0.3s;
    }

    .shadow:nth-child(10) {
      left: calc(50% + 45px);
      animation-delay: 0.4s;
    }

    @keyframes bounce {
      0% {
        transform: translateY(30px);
      }
      100% {
        transform: translateY(0);
      }
    }

    @keyframes shadow {
      0% {
        transform: scaleX(0.7);
        opacity: 0.5;
      }
      100% {
        transform: scaleX(1.3);
        opacity: 0.2;
      }
    }

    .loading-text {
      position: absolute;
      bottom: -5px;
      font-family: Arial, sans-serif;
      font-size: 14px;
      color: #666;
      letter-spacing: 3px;
      animation: textFade 1.5s infinite;
    }

    @keyframes textFade {
      0%, 100% { opacity: 0.5; }
      50% { opacity: 1; }
    }

        /* 加载动画-end */