* {
  margin: 0;
  padding: 0;
}

body {
  background-color: #f1f2f3;
}

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

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

header {
  text-align: center;
  margin-bottom: 25px;
}

header h1 {
  font-size: 2.2rem;
  margin-bottom: 5px;
}

header p {
  font-size: 1rem;
  opacity: 0.9;
  max-width: 95%;
  margin: 0 auto;
}

.container h2{
  font-size: 22px;
  line-height: 1;
  margin-bottom: 15px;
}

.main-content {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 25px;
}

.qrcode-section {
  flex: 1;
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  text-align: center;
}

.qrcode-container {
  margin: 10px 0;
  padding: 5px;
  background: #fff;
  display: inline-block;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.qrcode-container img {
  width: auto;
  height: 400px;
  display: block;
}

.code-section {
  flex: 1;
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.code-container {
  background: #f9f9f9;
  padding: 30px 10px;
  border-radius: 8px;
  margin: 25px 0;
  border: 1px dashed #ddd;
}

.code-text {
  font-size: 18px;
  color: #e53f3f;
  text-align: center;
  font-weight: bold;
  padding: 10px;
  word-break: break-all;
}

.btn-copy {
  display: block;
  width: 100%;
  padding: 15px;
  background: #1677ff;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.3s;
  margin-bottom: 25px;
}

.btn-copy:hover {
  background: #0e63e6;
}

.steps {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  margin-bottom: 25px;
}

.steps h2 {
  text-align: center;
  margin-bottom: 25px;
  color: #1677ff;
  font-size: 24px;
}

.step-list {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}

.step {
  width: 22%;
  text-align: center;
  padding: 20px;
}

.step-icon {
  font-size: 50px;
  margin-bottom: 15px;
  display: block;
}

.step-title {
  font-size: 18px;
  margin-bottom: 10px;
  color: #333;
  font-weight: bold;
}

.step-desc {
  color: #666;
  font-size: 14px;
}

.features {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  margin-bottom: 25px;
}

.features h2 {
  text-align: center;
  margin-bottom: 25px;
  color: #1677ff;
  font-size: 24px;
}

.feature-list {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.feature {
  width: 30%;
  padding: 20px;
  text-align: center;
}

.feature-icon {
  font-size: 40px;
  margin-bottom: 15px;
  display: block;
}

.feature-title {
  font-size: 18px;
  margin-bottom: 10px;
  color: #333;
  font-weight: bold;
}

.feature-desc {
  color: #666;
  font-size: 14px;
}

footer {
  text-align: center;
  color: #666;
  font-size: 14px;
}

.notice {
  position: fixed;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 14px 28px;
  border-radius: 6px;
  font-size: 16px;
  transition: bottom 0.5s ease;
  z-index: 1000;
}

.notice.show {
  bottom: 50px;
}

.usage-tips {
  font-size: 14px;
  color: #888;
  text-align: center;
}

.highlight {
  color: #e53f3f;
  font-weight: bold;
}