* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", Arial, sans-serif;
  background: #f5f7fb;
  color: #1f2937;
}

.container {
  max-width: 920px;
  margin: 24px auto;
  padding: 0 16px 24px;
}

h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

.desc {
  margin: 0 0 20px;
  color: #4b5563;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

label {
  display: block;
  margin: 10px 0 6px;
  font-weight: 600;
}

select,
input,
textarea,
button {
  font: inherit;
}

select,
input,
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  background: #fff;
}

textarea {
  resize: vertical;
  min-height: 120px;
}

.field-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-top: 8px;
}

.actions {
  margin-top: 14px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

button {
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  color: #fff;
  background: #2563eb;
}

button:hover {
  opacity: 0.92;
}

#copy-btn {
  background: #16a34a;
}

#clear-btn {
  background: #6b7280;
}