/* Section: 全局变量 */
:root {
  --color-primary: #006cff;
  --color-primary-dark: #0053c7;
  --color-success: #12a150;
  --color-warning: #b7791f;
  --color-danger: #d93025;
  --color-text: #1f2933;
  --color-muted: #697386;
  --color-border: #d9e2ec;
  --color-bg: #f5f7fb;
  --color-card: #fff;
  --color-shadow: #0f172a14;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
}

/* Section: 页面布局 */
body {
  margin: 0;
  font-family: -apple-system, blinkmacsystemfont, "Segoe UI", sans-serif;
  color: var(--color-text);
  background: radial-gradient(circle at top right, #dbeafe 0, transparent 16rem), var(--color-bg);
}

.page {
  min-height: 100vh;
}

.page-header,
.page-main,
.page-footer {
  max-width: 30rem;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.page-header {
  padding-bottom: var(--spacing-lg);
  padding-top: 2.5rem;
}

.page-eyebrow {
  margin: 0 0 var(--spacing-sm);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  text-transform: uppercase;
}

.page-title {
  margin: 0;
  font-size: 2rem;
  line-height: 1.2;
}

.page-subtitle {
  margin: var(--spacing-sm) 0 0;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-footer {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-muted);
  padding-bottom: var(--spacing-xl);
  padding-top: var(--spacing-lg);
}

/* Section: 支付卡片 */
.payment-card,
.result-view {
  padding: var(--spacing-lg);
  border: 1px solid #ffffffa6;
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: 0 1rem 2rem var(--color-shadow);
}

.payment-card-title,
.result-view-title {
  margin: 0;
  font-size: 1.35rem;
}

.payment-card-desc,
.result-view-desc {
  margin: var(--spacing-sm) 0 var(--spacing-lg);
  line-height: 1.7;
  color: var(--color-muted);
}

/* Section: 支付表单 */
.payment-form {
  display: grid;
  gap: var(--spacing-md);
}

.payment-form-field {
  display: grid;
  gap: var(--spacing-sm);
}

.payment-form-label {
  font-size: 0.95rem;
  font-weight: 700;
}

.payment-form-input,
.payment-form-select {
  box-sizing: border-box;
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-border);
  font-size: 1rem;
  color: var(--color-text);
  background-color: #fff;
  border-radius: var(--radius-md);
}

.payment-form-input:focus,
.payment-form-select:focus {
  border-color: var(--color-primary);
  outline: 2px solid #bfdbfe;
}

.payment-form-button,
.result-view-refresh,
.result-view-back {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 3rem;
  padding: 0 1rem;
  border: 0;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-md);
  cursor: pointer;
}

.payment-form-button,
.result-view-refresh {
  color: #fff;
  background-color: var(--color-primary);
}

.payment-form-button:hover,
.result-view-refresh:hover {
  background-color: var(--color-primary-dark);
}

.payment-form-button:disabled {
  opacity: 0.72;
  cursor: wait;
}

/* Section: 状态提示 */
.status-message {
  min-height: 1.5rem;
  margin: var(--spacing-md) 0 0;
  line-height: 1.6;
  color: var(--color-muted);
}

.status-message-error {
  color: var(--color-danger);
}

.status-message-success {
  color: var(--color-success);
}

/* Section: 结果页 */
.result-view {
  text-align: center;
}

.result-view-icon {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 4rem;
  height: 4rem;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  background-color: #eff6ff;
  border-radius: 50%;
  margin-bottom: var(--spacing-md);
}

.result-view-success .result-view-icon {
  color: var(--color-success);
  background-color: #ecfdf5;
}

.result-view-warning .result-view-icon {
  color: var(--color-warning);
  background-color: #fffbeb;
}

.result-view-error .result-view-icon {
  color: var(--color-danger);
  background-color: #fef2f2;
}

.result-view-detail {
  display: grid;
  gap: var(--spacing-sm);
  margin: 0 0 var(--spacing-lg);
  text-align: left;
}

.result-view-row {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.result-view-row dt {
  color: var(--color-muted);
}

.result-view-row dd {
  margin: 0;
  font-weight: 700;
  text-align: right;
  word-break: break-all;
}

.result-view-actions {
  display: grid;
  gap: var(--spacing-sm);
}

.result-view-back {
  color: var(--color-primary);
  background-color: #eff6ff;
}

@media (width >= 40rem) {
  .page-header,
  .page-main,
  .page-footer {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
  }
}