* {
  margin: 0;
  padding: 0;
}

body {
  background-color: #f1f2f3;
}

.container {
  box-sizing: border-box;
  width: 100%;
  max-width: 1560px;
  min-width: 1240px;
  margin: 25px auto;
  position: relative;
  color: #333;
}

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

header {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin-bottom: 25px;
  width: 100%;
}

header h1 {
  font-size: 2.2rem;
  margin-bottom: 10px;
  position: relative;
  display: inline-block;
}

header p{
  opacity: 0.9;
  font-size: 1.1rem;
}

.main-content {
  display: flex;
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
  padding: 20px;
  gap: 25px;
  margin-bottom: 25px;
}

.main-content .tip{
  color: #8a8a8a;
  font-size: 14px;
  line-height: 2;
}
.input-group {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.container label {
  display: block;
  margin-bottom: 10px;
  font-weight: 600;
  color: #444;
  font-size: 1.1rem;
}

.input-container {
  display: flex;
  flex-direction: column;
  width: 100%;
  margin-bottom: 20px;
}

.container input {
  flex: 1;
  padding: 14px 20px;
  border: 2px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
  outline: none;
  transition: border 0.3s;
}

.container  input:focus {
  border-color: #07C160;
}

.container  input::placeholder {
  color: #aaa;
}

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

.btn {
  padding: 14px 28px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, #07C160, #09BB07);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(7, 193, 96, 0.3);
}

.btn-secondary {
  background: #f1f2f3;
  color: #555;
}

.btn-secondary:hover {
  background: #e4e5e6;
}

.btn-download {
  background: linear-gradient(135deg, #1a6dff, #0d5bd9);
  color: white;
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(26, 109, 255, 0.3);
}

.btn-clear {
  background: linear-gradient(135deg, #ff4d4d, #e60000);
  color: white;
}

.btn-clear:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(255, 77, 77, 0.3);
}

.qr-container {
  width: 100%;
  max-width: 300px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  border: 1px solid #eee;
  position: relative;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-placeholder {
  text-align: center;
  color: #999;
  font-size: 1rem;
}

.qr-placeholder p {
  margin-top: 15px;
}

#qrcodeImg {
  max-width: 100%;
  border-radius: 8px;
  display: none;
}

.instructions {
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
  padding: 20px;
  margin-bottom: 25px;
}

.instructions h2 {
  margin-bottom: 20px;
  color: #1a1a1a;
  font-size: 1.4rem;
}

.method {
  display: flex;
  align-items: center;
  margin-top: 20px;
  padding: 15px 20px;
  border-radius: 10px;
  background: #f9f9f9;
  transition: transform 0.3s;
}

.method:hover {
  background: #f1f8ff;
}

.method-number {
  min-width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #07C160, #09BB07);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.2rem;
  margin-right: 20px;
}

.method-content h3 {
  font-size: 18px;
  margin-bottom: 5px;
  color: #07C160;
}

footer {
  text-align: center;
  color: #666;
}

.note {
  background: #fff9e6;
  border-left: 4px solid #ffcc00;
  padding: 15px;
  margin-top: 20px;
  border-radius: 0 8px 8px 0;
}

.feature-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
  margin-bottom: 25px;
}

.feature {
  background: white;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: all 0.3s;
}

.feature:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 10px;
}

.feature h3 {
  margin-bottom: 10px;
  color: #07C160;
}