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

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f6f4ef;
  color: #2c2c2a;
  font-size: 18px;
  line-height: 1.6;
}

.page { max-width: 560px; margin: 0 auto; padding: 16px 16px 40px; }

.header { text-align: center; padding: 24px 0 20px; }
.logo {
  display: inline-block;
  font-size: 34px;
  font-weight: 600;
  color: #fff;
  background: #c21807;
  border-radius: 16px;
  padding: 10px 28px;
  letter-spacing: 8px;
  text-indent: 8px;
}
.slogan { margin-top: 10px; color: #777; font-size: 16px; }

.card {
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 16px;
  border: 1px solid #e8e4da;
}

.step-title { font-size: 20px; font-weight: 600; margin-bottom: 14px; }
.step-num {
  display: inline-block;
  width: 30px; height: 30px;
  line-height: 30px;
  text-align: center;
  background: #c21807;
  color: #fff;
  border-radius: 50%;
  margin-right: 8px;
  font-size: 17px;
}

.upload-btn {
  display: block;
  text-align: center;
  background: #c21807;
  color: #fff;
  font-size: 22px;
  padding: 18px;
  border-radius: 14px;
  cursor: pointer;
}
.upload-btn input { display: none; }
.upload-btn.disabled { background: #b8b4a8; }

.progress { height: 14px; background: #eee; border-radius: 7px; margin-top: 14px; overflow: hidden; }
.progress-bar { height: 100%; width: 0%; background: #c21807; transition: width .2s; }

.file-info {
  margin-top: 14px;
  background: #fdf6ec;
  border: 1px solid #f0dfb8;
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 17px;
  word-break: break-all;
}

textarea {
  width: 100%;
  font-size: 19px;
  padding: 14px;
  border: 2px solid #ddd;
  border-radius: 12px;
  font-family: inherit;
  resize: none;
}
textarea:focus { outline: none; border-color: #c21807; }

.chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
.chip {
  font-size: 16px;
  padding: 8px 14px;
  border-radius: 20px;
  border: 1px solid #c21807;
  color: #c21807;
  background: #fff;
}
.chip:active { background: #c21807; color: #fff; }

.primary-btn {
  display: block;
  width: 100%;
  font-size: 22px;
  padding: 16px;
  border: none;
  border-radius: 14px;
  background: #c21807;
  color: #fff;
}
.primary-btn:disabled { background: #b8b4a8; }

.understood {
  background: #eef6ee;
  border: 1px solid #cde5cd;
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 17px;
  margin-bottom: 12px;
}
.understood:empty { display: none; }

.status { font-size: 17px; color: #555; }
.status.error { color: #c21807; }

.result audio { width: 100%; margin: 10px 0 14px; }

.download-btn {
  display: block;
  text-align: center;
  background: #1a7f37;
  color: #fff;
  font-size: 22px;
  padding: 16px;
  border-radius: 14px;
  text-decoration: none;
}

.tip { margin-top: 12px; font-size: 14px; color: #999; }

.footer { text-align: center; color: #aaa; font-size: 13px; margin-top: 24px; line-height: 1.8; }
.footer a { color: #aaa; text-decoration: none; }

.hidden { display: none !important; }