/* 易支付 Demo · 简洁支付工具风（Minimalism & Swiss）
   设计令牌来自 ui-ux-pro-max 设计系统输出，按钮绿加深到 #047857 以满足 4.5:1 对比度 */

:root {
  --color-primary: #1E3A5F;
  --color-secondary: #2563EB;
  --color-accent: #047857;          /* 支付 CTA / 已支付状态（白字对比度 5.6:1） */
  --color-accent-strong: #065F46;
  --color-background: #F8FAFC;
  --color-foreground: #0F172A;
  --color-card: #FFFFFF;
  --color-muted: #F1F3F5;
  --color-muted-foreground: #475569;
  --color-border: #E4E7EB;
  --color-destructive: #DC2626;
  --color-warn: #92400E;            /* 待支付状态文字（对 #FFF 对比度 6.7:1） */
  --color-warn-bg: #FEF3C7;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;

  --space-1: 4px; --space-2: 8px; --space-3: 16px;
  --space-4: 24px; --space-5: 32px; --space-6: 48px; --space-7: 64px;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;   /* 去掉 iOS 点按灰色高亮，用 :active 反馈替代 */
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-foreground);
  background: var(--color-background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.main { flex: 1; padding-top: var(--space-6); padding-bottom: var(--space-7); }

/* ---------- 页头 / 页脚 ---------- */

.site-header {
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 9px 0;               /* 26px 内容 + 18px = 44px 触控高度 */
  font-weight: 600;
  font-size: 17px;
  color: var(--color-primary);
  text-decoration: none;
}

.brand-icon { width: 22px; height: 22px; }

.site-nav { display: flex; gap: var(--space-2); }

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--space-2);
  border-radius: 8px;
  color: var(--color-muted-foreground);
  text-decoration: none;
  font-weight: 500;
  transition: background-color 200ms ease, color 200ms ease;
}

.site-nav a:hover { background: var(--color-muted); color: var(--color-foreground); }

.site-nav a.active { color: var(--color-primary); background: var(--color-muted); }

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  padding-bottom: calc(var(--space-4) + env(safe-area-inset-bottom, 0px));  /* iPhone 底部小黑条 */
  color: var(--color-muted-foreground);
  font-size: 13px;
}

.site-footer p { margin: 0; }

/* ---------- 卡片 ---------- */

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-5);
}

.card + .card { margin-top: var(--space-4); }

.card h1 { margin: 0 0 var(--space-2); font-size: 22px; }

.card h2 { margin: 0 0 var(--space-3); font-size: 16px; color: var(--color-muted-foreground); }

.subtitle { margin: 0 0 var(--space-4); color: var(--color-muted-foreground); }

.form-card { max-width: 440px; margin: 0 auto; }

/* ---------- 表单 ---------- */

.field { margin-bottom: var(--space-4); }

.field label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--space-1);
}

.field input {
  width: 100%;
  min-height: 48px;
  padding: 10px 14px;
  font-size: 16px;               /* ≥16px 避免 iOS 聚焦自动放大 */
  font-family: inherit;
  color: var(--color-foreground);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.field input:focus-visible {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.hint { margin: var(--space-1) 0 0; font-size: 13px; color: var(--color-muted-foreground); }

.hint a {
  color: var(--color-secondary);
  display: inline-block;
  padding: 12px 0;              /* 扩大文字链接触控区，手机上好点按 */
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 10px var(--space-4);
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  border: 1px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 200ms ease, border-color 200ms ease, color 200ms ease;
}

.btn svg { width: 18px; height: 18px; }

.btn-primary { background: var(--color-accent); color: #FFFFFF; }
.btn-primary:hover { background: var(--color-accent-strong); }
.btn:active { transform: scale(0.98); }        /* 触屏按压反馈 */

.btn-secondary {
  background: var(--color-card);
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn-secondary:hover { background: var(--color-muted); }

.btn-block { width: 100%; }

.btn:focus-visible,
.site-nav a:focus-visible,
.field input:focus-visible,
.order-item:focus-visible,
.brand:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

/* ---------- 提示条 ---------- */

.alert {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: 10px;
  margin-bottom: var(--space-4);
  font-size: 14px;
}

.alert svg { width: 18px; height: 18px; flex: none; }

.alert-error {
  background: #FEF2F2;
  color: #991B1B;
  border: 1px solid #FECACA;
}

/* ---------- 订单列表 ---------- */

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.page-head h1 { margin: 0; font-size: 22px; }

.order-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-2); }

.order-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding: var(--space-3) var(--space-4);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.order-item:hover { border-color: var(--color-secondary); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1); }

.order-item:active { border-color: var(--color-secondary); background: var(--color-muted); }

.order-main { display: flex; flex-direction: column; gap: 2px; min-width: 0; }

.order-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.order-no { font-family: var(--font-mono); font-size: 13px; color: var(--color-muted-foreground); }

.order-side { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }

.order-money { font-weight: 700; font-variant-numeric: tabular-nums; }

.order-time { font-size: 13px; color: var(--color-muted-foreground); }

.chip {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
}

.chip-paid { background: #ECFDF5; color: var(--color-accent-strong); }

.chip-unpaid { background: var(--color-warn-bg); color: var(--color-warn); }

.empty-card { text-align: center; padding: var(--space-7) var(--space-4); }

.empty-card svg { width: 40px; height: 40px; color: var(--color-muted-foreground); }

.empty-card p { color: var(--color-muted-foreground); margin: var(--space-3) 0 var(--space-4); }

/* ---------- 支付结果 / 详情 ---------- */

.result-card { text-align: center; max-width: 440px; margin: 0 auto var(--space-4); }

.result-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
}

.result-icon svg { width: 32px; height: 32px; }

.result-icon-paid { background: #ECFDF5; color: var(--color-accent); }

.result-icon-unpaid { background: var(--color-warn-bg); color: var(--color-warn); }

.result-icon-error { background: #FEF2F2; color: var(--color-destructive); }

.result-card .amount {
  margin: var(--space-2) 0;
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.result-card .subtitle { margin-bottom: var(--space-3); }

.detail-card { max-width: 440px; margin: 0 auto; }

.detail-list { margin: 0; }

.detail-list > div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-muted);
}

.detail-list > div:last-child { border-bottom: none; }

.detail-list dt { color: var(--color-muted-foreground); flex: none; }

.detail-list dd { margin: 0; text-align: right; word-break: break-all; }

.mono { font-family: var(--font-mono); font-size: 14px; }

.detail-card .hint { margin-top: var(--space-3); }

/* ---------- 跳转页 ---------- */

.center-page { display: flex; align-items: center; justify-content: center; }

.redirect-card { text-align: center; width: 100%; max-width: 420px; margin: var(--space-7) var(--space-3); }

.redirect-card h1 { font-size: 18px; }

.spinner {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--space-3);
  border: 3px solid var(--color-muted);
  border-top-color: var(--color-secondary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.redirect-card form { margin-top: var(--space-3); }

/* ---------- 响应式 ---------- */

@media (max-width: 480px) {
  .main { padding-top: var(--space-4); }

  .card { padding: var(--space-4); }

  .order-item { padding: var(--space-3); }

  .result-card .amount { font-size: 34px; }

  .page-head { flex-direction: column; align-items: stretch; }
}

/* ---------- 动效偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}