/* ============ 用户端（移动优先，简洁无多余链接，纯白背景宽输入） ============ */
* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: #fff;
  color: #1d1d1f;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 18px 48px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.card {
  background: #fff;
  border-radius: 0;
  padding: 8px 0;
  box-shadow: none;
}
.card.center { text-align: center; }
.big-title {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}
.body-text {
  font-size: 16px;
  color: #515154;
  margin-bottom: 20px;
}
/* 项目视频（管理端上传，用户端直接播放） */
.proj-video {
  display: block;
  width: 100%;
  max-height: 320px;
  border-radius: 12px;
  background: #000;
  margin-bottom: 20px;
}
/* 表单（宽输入框，单行可显示更多文字） */
#fbForm textarea {
  width: 100%;
  min-height: 150px;
  border: 1px solid #d9d9de;
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 16px;
  font-family: inherit;
  resize: vertical;
  outline: none;
  background: #fafafb;
  transition: border-color .15s;
}
#fbForm textarea:focus { border-color: #1d1d1f; background: #fff; }
.counter { text-align: right; font-size: 12px; color: #a0a0a8; margin: 4px 2px 14px; }
.upload-area {
  border: 1.5px dashed #c8c8cf;
  border-radius: 14px;
  padding: 22px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  margin-bottom: 14px;
}
.upload-area:active { background: #f2f2f4; }
.upload-area input[type="file"] { display: none; }
.upload-hint { font-size: 15px; color: #6e6e73; }
.preview { position: relative; margin-bottom: 14px; }
.preview img {
  width: 100%;
  max-height: 260px;
  object-fit: contain;
  border-radius: 12px;
  border: 1px solid #e5e5ea;
  background: #fafafb;
}
.remove-btn {
  position: absolute;
  top: 8px; right: 8px;
  width: 30px; height: 30px;
  border: none;
  border-radius: 50%;
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: 18px;
  line-height: 30px;
  text-align: center;
  cursor: pointer;
}
.err {
  background: #fdecec;
  color: #c0392b;
  font-size: 14px;
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 14px;
}
.submit-btn {
  width: 100%;
  border: none;
  border-radius: 14px;
  background: #1d1d1f;
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  padding: 15px 0;
  cursor: pointer;
  transition: opacity .15s;
}
.submit-btn:disabled { opacity: .45; cursor: default; }
/* 成功态 */
.success-box { text-align: center; padding: 40px 0 20px; }
.success-icon {
  width: 64px; height: 64px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: #e8f6ee;
  color: #1e8e5a;
  font-size: 34px;
  line-height: 64px;
}
.success-title { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.success-sub { font-size: 14px; color: #6e6e73; margin-bottom: 24px; }
.again-btn {
  width: 100%;
  border: none;
  border-radius: 12px;
  background: #1d1d1f;
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  padding: 15px 0;
  cursor: pointer;
}
.again-btn:active { opacity: .8; }
/* 页脚无任何链接 */