* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  html, body {
    height: 100%;
  }

  body {
    background: #fbfbfb;
    color: #fbfbfb;
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  }

  /* ===== 加载遮罩层 ===== */
  .loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fbfbfb;
    transition: opacity 0.5s ease, visibility 0.5s ease;
  }

  /* 隐藏状态 */
  .loading-overlay.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }

  /* 外层：整圈旋转 */
  .loader {
    width: 80px;
    height: 80px;
    animation: spin 1.6s linear infinite;
  }

  /* 圆环：单色，描边圆头 */
  .loader circle {
    fill: none;
    stroke: #1660ab;
    stroke-width: 5;
    stroke-linecap: round;
    animation: arc 1.6s ease-in-out infinite;
  }

  @keyframes spin {
    to { transform: rotate(360deg); }
  }

  @keyframes arc {
    0%, 100% { stroke-dasharray: 21 126; }
    50%      { stroke-dasharray: 63 126; }
  }

  /* ===== 页面内容 ===== */
  .content {
    padding: 40px;
    max-width: 720px;
    margin: 0 auto;
    opacity: 0;
    transition: opacity 0.6s ease 0.2s;
  }

  .content.is-visible {
    opacity: 1;
  }

  .content h1 {
    font-size: 24px;
    margin-bottom: 16px;
  }

  .content p {
    line-height: 1.7;
    color: #9fb0cc;
    margin-bottom: 24px;
  }

  .content img {
    width: 100%;
    border-radius: 12px;
    display: block;
  }
  .loading-text{
    position: absolute;
    margin-top: 100px;
    font-size: 20px;
    color: #1660ab;
    z-index: 3;
  }