:root {
  --font-sans: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
  --font-serif: "KaiTi", "楷体", "STKaiti", "Kaiti SC", serif;
  --color-primary: #d84315;
  --color-primary-deep: #a82704;
}

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

body {
  min-width: 320px;
  font-family: var(--font-sans);
  color: #1f1a1a;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.query-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  background:
    radial-gradient(circle at top left, rgba(216, 67, 21, 0.18), transparent 24%),
    radial-gradient(circle at bottom right, rgba(230, 81, 0, 0.18), transparent 20%),
    linear-gradient(135deg, #d84315 0%, #a82704 52%, #6e1a00 100%);
  position: relative;
  overflow: hidden;
}

.query-container::before,
.query-container::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 204, 128, 0.05);
}

.query-container::before {
  width: 420px;
  height: 420px;
  top: -120px;
  right: -100px;
}

.query-container::after {
  width: 280px;
  height: 280px;
  left: -70px;
  bottom: -80px;
}

.query-layout {
  width: min(1100px, 100%);
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(360px, 420px);
  gap: 28px;
  position: relative;
  z-index: 1;
}

.query-intro,
.query-card {
  border-radius: 28px;
  border: 1px solid rgba(255, 238, 206, 0.12);
  backdrop-filter: blur(12px);
}

.query-intro {
  padding: 56px 48px;
  background: linear-gradient(135deg, rgba(255, 250, 242, 0.12), rgba(255, 248, 236, 0.06));
  color: #fff7ea;
  box-shadow: 0 24px 60px rgba(28, 7, 8, 0.25);
}

.intro-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 28px;
}

.intro-logo {
  width: 100%;
  max-width: 360px;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 18px 28px rgba(8, 31, 53, 0.22));
}

.intro-subtitle {
  margin: 0 0 8px;
  color: rgba(255, 204, 128, 0.76);
  letter-spacing: 1px;
}

.intro-brand h1 {
  margin: 0;
  font-size: 42px;
  line-height: 1.2;
  font-family: var(--font-serif);
}

.intro-copy {
  margin: 0 0 34px;
  max-width: 560px;
  color: rgba(255, 204, 128, 0.84);
  line-height: 1.9;
  font-size: 16px;
}

.intro-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.intro-metrics div {
  padding: 18px 18px 16px;
  border-radius: 20px;
  background: rgba(255, 250, 241, 0.08);
  border: 1px solid rgba(255, 239, 212, 0.12);
}

.intro-metrics strong {
  display: block;
  margin-bottom: 8px;
  font-size: 28px;
  color: #ffcc80;
}

.intro-metrics span {
  color: rgba(200, 230, 201, 0.76);
  font-size: 13px;
}

.query-card {
  padding: 36px 32px;
  background: rgba(255, 252, 246, 0.95);
  box-shadow: 0 18px 48px rgba(35, 8, 10, 0.24);
  display: flex;
  flex-direction: column;
}

.query-card-head span {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--color-primary);
  font-size: 13px;
  letter-spacing: 2px;
}

.query-card-head h2 {
  margin: 0 0 12px;
  color: #1f1a1a;
  font-size: 30px;
  font-family: var(--font-serif);
}

.query-card-head p {
  margin: 0 0 24px;
  color: #5e5555;
  line-height: 1.8;
}

.query-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.query-form[hidden],
.result-section[hidden],
.error-message[hidden],
.toast[hidden] {
  display: none !important;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field label {
  font-size: 14px;
  font-weight: 600;
  color: #1f1a1a;
}

.form-field input {
  padding: 12px 16px;
  border: 1px solid rgba(216, 67, 21, 0.18);
  border-radius: 14px;
  background: #faf5f0;
  font-size: 15px;
  color: #1f1a1a;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.form-field input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(216, 67, 21, 0.1);
}

.form-field input::placeholder {
  color: rgba(94, 85, 85, 0.5);
}

.error-message {
  padding: 8px 12px;
  background: rgba(180, 60, 60, 0.08);
  color: #b93e3e;
  border-radius: 10px;
  font-size: 13px;
  border: 1px solid rgba(180, 60, 60, 0.15);
}

.button-group {
  display: flex;
  gap: 12px;
  margin-top: 4px;
}

.query-button {
  flex: 1;
  min-height: 52px;
  border: none;
  border-radius: 16px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 1px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.query-button.primary {
  background: linear-gradient(135deg, #d84315 0%, #a82704 52%, #6e1a00 100%);
  color: #fff8ef;
  box-shadow: 0 16px 28px rgba(168, 39, 4, 0.24);
}

.query-button.primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 20px 34px rgba(168, 39, 4, 0.3);
}

.query-button.primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.query-button.secondary {
  background: #faf5f0;
  color: var(--color-primary);
  border: 1px solid rgba(216, 67, 21, 0.18);
}

.query-button.secondary:hover {
  background: #fbe9e7;
}

.result-section {
  text-align: center;
}

.result-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.result-icon.success {
  background: linear-gradient(135deg, #4caf50 0%, #2e7d32 100%);
}

.result-icon.warning {
  background: linear-gradient(135deg, #ff9800 0%, #f57c00 100%);
}

.result-icon.info {
  background: linear-gradient(135deg, #2196f3 0%, #1565c0 100%);
}

.result-icon svg {
  width: 36px;
  height: 36px;
}

.result-title {
  margin: 0 0 8px;
  font-size: 24px;
  color: #1f1a1a;
  font-family: var(--font-serif);
}

.result-subtitle {
  margin: 0 0 24px;
  color: #5e5555;
  font-size: 15px;
}

.result-info {
  background: #faf5f0;
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 24px;
}

.info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid rgba(216, 67, 21, 0.08);
}

.info-item:last-child {
  border-bottom: none;
}

.info-label {
  color: #5e5555;
  font-size: 14px;
}

.info-value {
  color: #1f1a1a;
  font-weight: 600;
  font-size: 15px;
}

.info-value.highlight {
  color: var(--color-primary);
  font-size: 16px;
}

.back-button {
  width: 100%;
  min-height: 52px;
  border: 1px solid rgba(216, 67, 21, 0.18);
  border-radius: 16px;
  background: #faf5f0;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 15px;
  transition: background 0.25s ease;
}

.back-button:hover {
  background: #fbe9e7;
}

.toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  max-width: min(90vw, 420px);
  padding: 12px 18px;
  border-radius: 12px;
  background: rgba(31, 26, 26, 0.92);
  color: #fff8ef;
  font-size: 14px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.22);
}

@media (max-width: 900px) {
  .query-layout {
    grid-template-columns: 1fr;
  }

  .query-intro {
    padding: 36px 28px;
  }

  .intro-brand h1 {
    font-size: 34px;
  }
}

@media (max-width: 560px) {
  .query-container {
    padding: 20px 14px;
  }

  .query-card {
    padding: 28px 20px;
  }

  .intro-metrics {
    grid-template-columns: 1fr;
  }

  .button-group {
    flex-direction: column;
  }
}