/* 协议/授权书页面样式，适配 PC 与手机端 */
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #333;
  line-height: 1.8;
  background: #f5f6fa;
}

.doc { max-width: 800px; margin: 0 auto; background: #fff; min-height: 100vh; }

.doc-header {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center;
  height: 52px; padding: 0 14px;
  background: #2f77f0; color: #fff;
}
.doc-header .back {
  border: none; background: transparent; color: #fff;
  font-size: 16px; cursor: pointer; padding: 6px 10px 6px 0;
}
.doc-header h1 {
  flex: 1; text-align: center; font-size: 17px; font-weight: 600;
  margin-right: 40px;
}

.doc-body { padding: 20px 20px 30px; }
.doc-body .update { font-size: 12px; color: #999; margin-bottom: 16px; }
.doc-body .intro {
  font-size: 14px; color: #555; background: #f7f9fc;
  padding: 14px 16px; border-radius: 8px; margin-bottom: 20px;
}
.doc-body h2 {
  font-size: 16px; color: #1a1a1a; font-weight: 700;
  margin: 22px 0 10px; padding-left: 10px;
  border-left: 3px solid #2f77f0;
}
.doc-body p {
  font-size: 14px; color: #555; margin-bottom: 8px;
}
.doc-body p.indent { padding-left: 16px; color: #666; }
.doc-body .tail {
  margin-top: 24px; font-size: 14px; color: #888;
}

.doc-footer {
  text-align: center; font-size: 12px; color: #bbb;
  padding: 20px; border-top: 1px solid #f0f0f0;
}

@media (min-width: 900px) {
  body { background: #eef2f8; padding: 30px 0; }
  .doc {
    min-height: auto; border-radius: 14px; overflow: hidden;
    box-shadow: 0 10px 40px rgba(31,45,61,.1);
  }
  .doc-header { border-radius: 0; }
  .doc-body { padding: 30px 40px 40px; }
}