* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
  }

  body {
    background-color: #fff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
      Helvetica, Arial, sans-serif;
    color: #1e293b;
    line-height: 1.45;
    padding: 24px 16px 52px;
  }

  /* 主容器 */
  .app-wrapper {
    max-width: 600px;
    margin: 0 auto;
  }

  /* ========= 头部 ========= */
  .hero {
    text-align: center;
    margin-bottom: 36px;
  }

  .logo-block {
    width: 88px;
    height: 88px;
    /* background: linear-gradient(145deg, #1e293b, #0f172a); */
    border-radius: 24px;
    margin: 0 auto 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 12px 20px -12px rgb(0 177 255 / 73%);
  }

  .logo-block span {
    font-size: 38px;
    font-weight: 700;
    color: white;
    letter-spacing: 1px;
  }

  .app-title {
    font-size: 34px;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: #0f172a;
    margin-bottom: 6px;
  }

  .badge-os {
    font-size: 15px;
    font-weight: 500;
    color: #4b5565;
    background: #eef2ff;
    display: inline-block;
    padding: 4px 14px;
    border-radius: 30px;
  }

  /* =========卡片样式 ========= */
  .card {
    background: #ffffff;
    border-radius: 28px;
    padding: 20px;
    margin-bottom: 28px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03),
      0 0 0 0.5px rgba(0, 0, 0, 0.03);
    transition: all 0.1s ease;
  }

  /* 信息网格 */
  .info-compare {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 18px;
  }

  .info-platform {
    background: #f8fafc;
    border-radius: 20px;
    padding: 16px;
    border: 0.5px solid #eef2f6;
  }

  .info-compare .info-platform:only-child {
    grid-column: 1 / -1;
  }

  .info-platform .os-name {
    font-size: 18px;
    font-weight: 600;
    color: #475569;
    margin-bottom: 12px;
  }

  .info-item + .info-item {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 0.5px solid #e6edf5;
  }

  .info-label {
    font-size: 12px;
    color: #64748b;
    margin-bottom: 4px;
  }

  .info-value {
    font-size: 15px;
    font-weight: 600;
    color: #0f172a;
    line-height: 1.45;
    word-break: break-word;
  }

  .info-value.size-num {
    font-size: 24px;
    letter-spacing: -0.2px;
  }

  .note-light {
    font-size: 12px;
    color: #5b6e8c;
    /* background: #f8fafc; */
    display: inline-block;
    padding: 5px 14px;
    border-radius: 30px;
  }

  .app-description {
    font-size: 15px;
    line-height: 1.85;
    color: #334155;
    background: linear-gradient(180deg, #f8fbff 0%, #f4f7fb 100%);
    border: 1px solid #e7eef7;
    border-radius: 18px;
    padding: 16px 18px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75);
    text-align: justify;
    word-break: break-word;
  }

  .about-panel {
    position: relative;
    overflow: hidden;
    margin-bottom: 28px;
    padding: 22px 20px 20px;
    border-radius: 24px;
    background: linear-gradient(135deg, #ffffff 0%, #f7fbff 100%);
    border: 1px solid #e8f0fa;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
  }

  .about-panel::before {
    content: "";
    position: absolute;
    top: -28px;
    right: -28px;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, rgba(59, 130, 246, 0) 72%);
    pointer-events: none;
  }

  .about-panel-header {
    position: relative;
    z-index: 1;
    margin-bottom: 14px;
  }

  .about-panel-title {
    font-size: 20px;
    font-weight: 700;
    color: #0f172a;
    letter-spacing: -0.25px;
  }

  .about-panel-body {
    position: relative;
    z-index: 1;
    font-size: 15px;
    line-height: 1.9;
    color: #475569;
    /* background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: 18px;
    padding: 16px 18px; */
    backdrop-filter: blur(2px);
    word-break: break-word;
    white-space: pre-line;
  }

  /* 截图区域 */
  .section-title {
    font-size: 19px;
    font-weight: 640;
    margin-bottom: 18px;
    color: #0f172a;
    letter-spacing: -0.2px;
  }

  .screenshot-scroll {
    display: flex;
    gap: 14px;
    overflow-x: auto;
    padding-bottom: 8px;
  }

  .screenshot-scroll::-webkit-scrollbar {
    height: 4px;
  }

  .screenshot-scroll::-webkit-scrollbar-track {
    background: #e9eef3;
    border-radius: 10px;
  }

  .screenshot-scroll::-webkit-scrollbar-thumb {
    background: #b9c8da;
    border-radius: 10px;
  }

  .screen-mock {
    flex: 0 0 180px;
    background: #f1f5f9;
    border-radius: 26px;
    /* height: 280px; */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
  }
  .screen-mock img {
    width: 100%;
  }
  .mock-rect {
    width: 88px;
    height: 88px;
    background-color: #e2e8f0;
    border-radius: 20px;
  }

  .mock-label {
    font-size: 13px;
    font-weight: 500;
    color: #516077;
  }
  .qrcode {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 0px 24px;
    margin-bottom: 32px;
    position: relative;
    /* min-height: 298px; */
  }

  .download-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    color: #64748b;
    transition: opacity 0.35s ease;
  }

  .download-spinner {
    width: 42px;
    height: 42px;
    border: 3px solid #dbeafe;
    border-top-color: #007aff;
    border-radius: 50%;
    animation: download-spin 0.8s linear infinite;
  }

  .download-loading-text {
    font-size: 14px;
    letter-spacing: 0.2px;
  }

  .download-content {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.35s ease;
  }

  .qrcode.is-ready .download-loading {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    position: absolute;
  }

  .qrcode.is-ready .download-content {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  @keyframes download-spin {
    from {
      transform: rotate(0deg);
    }
    to {
      transform: rotate(360deg);
    }
  }

  .qrcode img {
    display: block;
    width: 180px;
    max-width: 100%;
    margin: 0 auto 18px;
  }

  .btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 220px;
    max-width: 100%;
    background: #007aff;
    /*iOS蓝 / 系统蓝调，符合大多数应用审美 */
    color: white;
    text-decoration: none;
    font-size: 18px;
    font-weight: 590;
    padding: 10px 20px;
    border-radius: 60px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    margin: 0 auto 22px;
    letter-spacing: -0.2px;
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.2);
  }

  .btn-primary:active {
    background: #005fc1;
    transform: scale(0.98);
    box-shadow: 0 1px 4px rgba(0, 122, 255, 0.2);
  }

  .download-group{
    margin-bottom: 32px;
  }
  .double-btns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    width: 100%;
  }

  .btn-outline {
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    min-width: 0;
    width: 100%;
    min-height: 56px;
    background: #007aff;
    border: 1px solid #d7e3f3;
    padding: 10px 14px;
    border-radius: 18px;
    font-size: 15px;
    font-weight: 560;
    line-height: 1.35;
    color: #fff;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
  }

  .btn-outline-icon {
    flex: 0 0 42px;
    width: 42px;
    height: 42px;
    border-radius: 21px;
    /* background: #f8fafc; */
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .btn-outline img {
    width: 42px;
    height: 42px;
    object-fit: contain;
  }

  .btn-outline-text {
    flex: 1;
    min-width: 0;
    word-break: break-word;
  }

  .btn-outline:hover {
    border-color: #bfd7ff;
    box-shadow: 0 10px 24px rgba(0, 122, 255, 0.12);
    transform: translateY(-1px);
  }

  .btn-outline:active {
    background: #f8fbff;
    transform: scale(0.98);
    box-shadow: 0 6px 14px rgba(0, 122, 255, 0.12);
  }

  @media (max-width: 420px) {
    .info-compare {
      grid-template-columns: 1fr;
    }

    .double-btns {
      grid-template-columns: 1fr;
    }

    .btn-outline {
      min-height: 60px;
    }
  }

  .download-footer {
    text-align: center;
    font-size: 11px;
    color: #6c7a91;
    margin-top: 22px;
  }

  /* 反馈卡片 */
  .feedback-card {
    background: #ffffff;
    border-radius: 28px;
    padding: 22px 20px;
    margin-top: 32px;
    margin-bottom: 32px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
    border: 0.5px solid #ecf1f7;
  }

  .feedback-card .title {
    font-size: 19px;
    font-weight: 640;
    margin-bottom: 8px;
    color: #0f172a;
  }

  .feedback-desc {
    font-size: 14px;
    color: #4a5a72;
    line-height: 1.45;
    margin-bottom: 20px;
  }

  .feedback-btn {
    background: #eef2ff;
    border: none;
    display: block;
    padding: 10px 24px;
    border-radius: 40px;
    font-size: 15px;
    font-weight: 510;
    color: #1f3a6b;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: auto;
  }

  .feedback-btn:active {
    background: #e2e8f2;
  }

  /* 免责声明细线 + 标准灰 */
  .legal {
    font-size: 14px;
    color: #8c9aa8;
    text-align: left;
    line-height: 1.55;
    margin-top: 16px;
    padding-top: 20px;
    border-top: 0.5px solid #eef2f6;
  }

  /* 些许调整 */
  .spacer {
    height: 4px;
  }

  /* 隐藏元素 */
  .hidden {
    display: none;
  }

  /* 弹出层样式 */
  #overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
    justify-content: center;
  }

  /* 弹出层内容区 */
  #overlayContent {
    width: 80%;
    max-width: 400px;
    background-color: white;
    padding: 100px 0 0 0;
    border-radius: 10px;
    text-align: left;
    color: #fff;
    font-size: 20px;
    background-color: transparent;
  }

  /* 关闭按钮 */
  #closeButton {
    margin-top: 10px;
    margin-left: 30%;
    padding: 10px 20px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 20px;
    background-color: transparent;
    color: #fff;
    border: 1px dashed #fff;
  }

  /* 圆形数字样式 */
  .circle {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 30px;
    height: 30px;
    background-color: red;
    border-radius: 50%;
    color: white;
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    line-height: 50px;
    margin: 5px;
  }

  /* 弹出层图片 */
  .overlayImage {
    position: fixed;
    top: 10px;
    right: 10px;
    width: 100px;
    height: auto;
    cursor: pointer;
    z-index: 1001;
  }