* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 25%, #16213e 50%, #1a1a2e 75%, #0f0f0f 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  color: #ffffff;
}

.container {
  width: 100%;
  max-width: 420px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  padding: 32px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.05), inset 0 1px 0
    rgba(255, 255, 255, 0.1);
}

.header {
  text-align: center;
  margin-bottom: 32px;
}

.icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, #007aff 0%, #5856d6 100%);
  border-radius: 16px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0, 122, 255, 0.3);
}

.icon svg {
  width: 32px;
  height: 32px;
  color: white;
}

.title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #ffffff;
}

.description {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.5;
}

.form-group {
  margin-bottom: 24px;
}

.label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.9);
}

.input {
  width: 100%;
  height: 48px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  padding: 0 16px;
  font-size: 16px;
  color: #ffffff;
  transition: all 0.2s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.input:focus {
  outline: none;
  border-color: #007aff;
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
  background: rgba(255, 255, 255, 0.12);
}

.download-btn {
  width: 100%;
  height: 48px;
  background: linear-gradient(135deg, #007aff 0%, #5856d6 100%);
  border: none;
  border-radius: 12px;
  color: white;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
  margin-bottom: 24px;
}

.download-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
}

.download-btn:active:not(:disabled) {
  transform: translateY(0);
}

.download-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.author-info {
  text-align: center;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.author-info a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-weight: 400;
  transition: all 0.3s ease;
  padding: 8px 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.author-info a:hover {
  color: rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.author-info a::before {
  content: "✦";
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}

/* 响应式设计 */
@media (max-width: 480px) {
  .container {
    padding: 24px;
    border-radius: 16px;
  }

  .title {
    font-size: 20px;
  }

  .input,
  .download-btn {
    height: 44px;
  }
}