* {
  margin: 0;
  padding: 0;
}

body {
  background-color: #f1f2f3;
}

.container {
  box-sizing: border-box;
  width: 100%;
  max-width: 1600px;
  min-width: 1240px;
  margin: 25px auto;
  color: #333;
  display: flex;
  flex-direction: column;
}

.container * {
  box-sizing: border-box;
}

/* 头部样式 */
header {
  position: relative;
  margin-bottom: 20px;
  text-align: center;
}

header h1 {
  font-size: 32px;
  margin-bottom: 5px;
}

header p {
  font-size: 16px;
  line-height: 1.6;
}

.main-content {
  display: flex;
  gap: 25px;
  margin-bottom: 25px;
}

.panel{
  flex: 1;
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.panel h2 {
  font-size: 1.3rem;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

textarea {
  width: 100%;
  min-height: 300px;
  padding: 15px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 15px;
  line-height: 1.5;
  resize: vertical;
  background-color: #fafafa;
  transition: border-color 0.3s, box-shadow 0.3s;
}

textarea:focus {
  outline: none;
  border-color: #2575fc;
  box-shadow: 0 0 0 3px rgba(37, 117, 252, 0.15);
}

.btn-group {
  display: flex;
  gap: 15px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  color: white;
}

.btn-secondary {
  background: #f0f4f8;
  color: #2d3748;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn:active {
  transform: translateY(0);
}

.json-output {
  height: 365px;
  overflow: auto;
  padding: 15px;
  font-size: 15px;
  border-radius: 8px;
  background: #f8fafc;
  border: 1px solid #eee;
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.5;
  transition: all 0.3s ease;
}

.notice {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  padding: 15px 30px;
  background: rgba(0, 0, 0, 0.85);
  color: white;
  border-radius: 50px;
  font-size: 16px;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.notice.show {
  opacity: 1;
}

.how-to-use {
  background: #f0f7ff;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 25px;
}

.how-to-use h2 {
  font-size: 1.3rem;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 15px;
}

.step {
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.step h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  color: #2b6cb0;
}

footer {
  text-align: center;
  color: #718096;
  font-size: 0.9rem;
}