:root {
  --primary: #0a4bb7;
  --primary-dark: #053b8a;
  --accent: #f5c600;
  --bg: #f5f6fb;
  --text: #1f1f1f;
  --card-bg: #ffffff;
  --border: #e0e4ee;
  --shadow: 0 8px 24px rgba(10, 75, 183, 0.08);
}

* {
  box-sizing: border-box;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #0a4bb7, #053b8a 45%, #021d47 100%);
  color: var(--text);
  min-height: 100vh;
}

.page {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

.header {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
  text-align: center;
  box-shadow: var(--shadow);
}

.header h1 {
  color: var(--accent);
  margin: 0 0 12px;
  font-size: 1.8rem;
  letter-spacing: 2px;
}

.header p {
  margin: 0;
  line-height: 1.6;
  color: #333;
}

main {
  display: grid;
  gap: 24px;
}

.form-section,
.qr-section {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.form-section h2 {
  margin-top: 0;
  color: var(--primary);
  font-size: 1.2rem;
  border-left: 4px solid var(--accent);
  padding-left: 12px;
  margin-bottom: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 16px;
}

.form-group label {
  font-weight: 600;
  margin-bottom: 8px;
  font-size: .95rem;
}

.form-group label span {
  color: #ff4d4f;
  margin-left: 4px;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10, 75, 183, 0.15);
}

.radio-group {
  display: flex;
  gap: 24px;
  margin-top: 4px;
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  margin-bottom: 0;
  flex-shrink: 0;
}

.radio-group input[type="radio"] {
  width: 18px;
  height: 18px;
  margin: 0;
  flex-shrink: 0;
  accent-color: var(--primary);
}

.form-group small {
  color: #777;
  margin-top: 6px;
}

/* Upload area */
.upload-group {
  margin-bottom: 20px;
}

.upload-area {
  position: relative;
  border: 2px dashed var(--border);
  border-radius: 14px;
  background: #fafbfe;
  transition: border-color .2s, background .2s;
  cursor: pointer;
}

.upload-area:hover,
.upload-area:active {
  border-color: var(--primary);
  background: #f0f4ff;
}

.upload-area input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 2;
}

.upload-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
  pointer-events: none;
}

.upload-placeholder svg {
  margin-bottom: 10px;
}

.upload-placeholder p {
  color: #555;
  font-size: .95rem;
  margin-bottom: 4px;
}

.upload-placeholder small {
  color: #aaa;
  font-size: .8rem;
}

.upload-preview {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  pointer-events: none;
}

.upload-preview span {
  color: var(--primary);
  font-weight: 500;
  font-size: .9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 80%;
}

.upload-remove {
  pointer-events: auto;
  position: relative;
  z-index: 5;
  background: #ff4d4f;
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  cursor: pointer;
  font-size: .75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.submit-btn {
  width: 100%;
  padding: 14px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  margin-top: 8px;
}

.submit-btn:hover {
  background: var(--primary-dark);
}

.submit-btn:active {
  transform: translateY(1px);
}

/* QR page */
.qr-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 420px;
  margin: 0 auto;
}

.qr-section h2 {
  margin-top: 0;
  color: var(--primary);
  font-size: 1.2rem;
  border-left: 4px solid var(--accent);
  padding-left: 12px;
  margin-bottom: 16px;
}

#qrCanvas {
  margin: 16px 0;
  padding: 12px;
  background: #fff;
  border-radius: 12px;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.05);
}

.qr-hint {
  color: #555;
  font-size: .95rem;
  margin-top: 8px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 40px;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 12px 20px;
  border-radius: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 30;
  white-space: nowrap;
}

.toast.show {
  opacity: 1;
}

/* Phone responsive */
@media (max-width: 480px) {
  html { font-size: 14px; }

  .page {
    padding: 12px 10px 32px;
  }

  .header {
    padding: 18px 14px;
    border-radius: 12px;
    margin-bottom: 16px;
  }

  .header h1 {
    font-size: 1.5rem;
    letter-spacing: 1px;
  }

  .header p {
    font-size: .9rem;
    line-height: 1.5;
  }

  .form-section {
    padding: 18px 14px;
    border-radius: 12px;
  }

  .form-section h2 {
    font-size: 1.05rem;
    margin-bottom: 12px;
  }

  .form-group {
    margin-bottom: 14px;
  }

  .form-group label {
    font-size: .9rem;
    margin-bottom: 6px;
  }

  .form-group input,
  .form-group select,
  .form-group textarea {
    padding: 11px 10px;
    border-radius: 10px;
    font-size: 1rem;
  }

  .radio-group {
    flex-direction: column;
    gap: 10px;
  }

  .radio-group input[type="radio"] {
    width: 20px;
    height: 20px;
  }

  .upload-placeholder {
    padding: 24px 12px;
  }

  .submit-btn {
    padding: 13px;
    font-size: 1.05rem;
    border-radius: 10px;
  }

  .toast {
    bottom: 24px;
    font-size: .9rem;
  }
}

@media (max-width: 360px) {
  html { font-size: 13px; }
  .header h1 { font-size: 1.35rem; }
  .form-section { padding: 14px 10px; }
}