body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  overflow: hidden;
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 60px 20px 20px;
  box-sizing: border-box;
}

.content-box {
  background: white;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  text-align: center;
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  margin-top: 10%;
}

h1 {
  color: #333;
  font-size: 28px;
  margin-bottom: 20px;
  font-weight: 600;
}

p {
  color: #666;
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 30px;
}

.open-button {
  display: inline-block;
  padding: 16px 40px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-size: 18px;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
  border: none;
  cursor: pointer;
}

.open-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.open-button:active {
  transform: translateY(0);
}

.hint {
  margin-top: 25px;
  padding: 15px;
  background-color: #f0f4ff;
  border-radius: 10px;
  font-size: 14px;
  color: #555;
}

.icon {
  width: 120px;
  height: 120px;
  margin-bottom: 20px;
  object-fit: contain;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .container {
    padding: 15px;
    height: 100vh;
  }

  .content-box {
    padding: 25px 20px;
    max-width: 90%;
    width: auto;
    max-height: none;
    overflow-y: visible;
    margin-top: 45%;
  }

  .icon {
    width: 100px;
    height: 100px;
    margin-bottom: 15px;
  }

  h1 {
    font-size: 20px;
    margin-bottom: 15px;
  }

  p {
    font-size: 14px;
    margin-bottom: 25px;
  }

  .open-button {
    padding: 12px 30px;
    font-size: 15px;
    width: 100%;
    box-sizing: border-box;
  }

  .hint {
    font-size: 12px;
    margin-top: 20px;
    padding: 12px;
  }
}