body {
  font-family: Arial, "Microsoft YaHei", sans-serif;
  max-width: 900px;
  margin: 40px auto;
  padding: 0 16px;
  background: #f7f7f7;
  color: #222;
}

.card {
  background: #fff;
  border-radius: 14px;
  padding: 24px;
  box-shadow: 0 8px 24px rgba(0,0,0,.08);
}

h1 { margin-top: 0; }

textarea,
input {
  width: 100%;
  box-sizing: border-box;
  margin: 8px 0 16px;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 10px;
  font-size: 15px;
}

textarea {
  min-height: 150px;
  resize: vertical;
}

button {
  padding: 11px 18px;
  margin-right: 10px;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  font-weight: bold;
}

.primary { background: #1677ff; color: white; }
.secondary { background: #eee; color: #222; }

.link-btn {
  padding: 0;
  margin: 0;
  border: 0;
  background: transparent;
  color: #1677ff;
  text-decoration: underline;
  cursor: pointer;
  font: inherit;
  font-weight: normal;
}

.tips {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
}

.status {
  margin-top: 12px;
  font-weight: bold;
}

.output-label {
  display: block;
  margin-top: 20px;
}

.ok { color: green; }
.err { color: red; }