:root {
  --primary-color: #F58A42;
  --gradient-start: #F9A948;
  --gradient-end: #F3734D;
  --bg-light: #f4f4f4;
  --text-color: #333;
}

body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  color: var(--text-color);
  background-color: white;
}

header {
  background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
  color: white;
  padding: 1rem;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav .logo {
    font-size: 3.5rem;
    display: flex;
    align-items: center;
    font-weight: bold; /* 或 font-weight: 700; */
}

nav .logo img {
  height: 40px;
  margin-right: 0.5rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
}

nav a {
  color: white;
  text-decoration: none;
}

.hero {
  text-align: center;
  padding: 4rem 1rem;
  background-color: var(--bg-light);
}

.hero h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.download-btn {
  margin: 0.5rem;
  padding: 1rem 2rem;
  background: var(--primary-color);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  transition: 0.3s ease;
}

.download-btn:hover {
  background: var(--gradient-end);
}

.qr-section {
  text-align: center;
  padding: 2rem;
}

footer {
  background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
  color: white;
  text-align: center;
  padding: 1.5rem 1rem;
  font-size: 0.9rem;
}