/* ============================================================
   iOS 26 Liquid Glassmorphism 设计系统
   浅色系 · Mobile-First · 高斯模糊 · 液态边框 · 弹性触感
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --bg-1: #c2e9fb;
  --bg-2: #a1c4fd;
  --bg-3: #fbc2eb;
  --bg-4: #a6c0fe;

  --text-primary:   #1d1d1f;
  --text-secondary:  #6e6e73;
  --text-tertiary:   #aeaeb2;

  --accent:          #0A84FF;
  --accent-2:        #5E5CE6;
  --accent-gradient: linear-gradient(135deg, #0A84FF, #5E5CE6);
  --success:         #34C759;
  --danger:          #FF3B30;
  --warning:         #FF9500;

  --glass-bg:        rgba(255, 255, 255, 0.55);
  --glass-bg-strong: rgba(255, 255, 255, 0.72);
  --glass-border:    rgba(255, 255, 255, 0.65);
  --glass-blur:      20px;
  --glass-shadow:    0 8px 32px rgba(31, 38, 135, 0.10);
  --glass-shadow-sm: 0 4px 16px rgba(31, 38, 135, 0.08);

  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;

  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 重置 ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-tap-highlight-color: transparent; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  color: var(--text-primary);
  min-height: 100vh;
  /* 柔和渐变 mesh 背景 */
  background:
    radial-gradient(ellipse at top left, var(--bg-1) 0%, transparent 50%),
    radial-gradient(ellipse at top right, var(--bg-3) 0%, transparent 50%),
    radial-gradient(ellipse at bottom left, var(--bg-4) 0%, transparent 50%),
    radial-gradient(ellipse at bottom right, var(--bg-2) 0%, transparent 50%),
    linear-gradient(135deg, #e0f2ff 0%, #f0e6ff 50%, #ffe6f5 100%);
  background-attachment: fixed;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 16px;
  padding-bottom: 40px;
}

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: 480px;       /* Mobile-First，桌面端居中窄列 */
  padding-top: 24px;
}

/* ============================================================
   液态玻璃基础组件
   ============================================================ */

.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
}

.glass-strong {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
}

/* 液态边框高光（伪元素叠加渐变光晕） */
.glass::before,
.glass-strong::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(255,255,255,0.8), rgba(255,255,255,0.1) 40%, rgba(255,255,255,0.3));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* ============================================================
   头部
   ============================================================ */
.app-header {
  text-align: center;
  margin-bottom: 20px;
}
.app-header h1 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.app-header p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ============================================================
   引流按钮区
   ============================================================ */
.traffic-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.traffic-btn {
  flex: 1;
  min-width: 100px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  box-shadow: var(--glass-shadow-sm);
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s var(--ease-smooth);
  cursor: pointer;
}
.traffic-btn:active {
  transform: scale(0.92);
  box-shadow: 0 2px 8px rgba(31, 38, 135, 0.12);
}
.traffic-btn svg { width: 16px; height: 16px; }

/* ============================================================
   Tab 导航
   ============================================================ */
.tab-nav {
  display: flex;
  gap: 6px;
  padding: 5px;
  margin-bottom: 20px;
  position: relative;
}
.tab-btn {
  flex: 1;
  padding: 10px;
  border: none;
  background: transparent;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s var(--ease-smooth);
  position: relative;
  z-index: 1;
}
.tab-btn.active {
  color: #fff;
}
.tab-indicator {
  position: absolute;
  top: 5px;
  bottom: 5px;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient);
  box-shadow: 0 2px 12px rgba(10, 132, 255, 0.35);
  transition: left 0.35s var(--ease-spring), width 0.35s var(--ease-spring);
  z-index: 0;
}

/* ============================================================
   卡片 / 面板
   ============================================================ */
.panel {
  position: relative;
  padding: 24px;
  margin-bottom: 20px;
}
.panel-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ============================================================
   商品选择卡片
   ============================================================ */
.product-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
}
.product-card {
  position: relative;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  border: 1.5px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s var(--ease-spring);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.product-card:active { transform: scale(0.97); }
.product-card.selected {
  border-color: var(--accent);
  background: rgba(10, 132, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(10, 132, 255, 0.12);
}
.product-card .pc-name {
  font-size: 15px;
  font-weight: 600;
}
.product-card .pc-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid rgba(0,0,0,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.25s var(--ease-spring);
}
.product-card.selected .pc-check {
  border-color: var(--accent);
  background: var(--accent);
}
.product-card .pc-check svg {
  width: 14px; height: 14px;
  color: #fff;
  opacity: 0;
  transition: opacity 0.2s;
}
.product-card.selected .pc-check svg { opacity: 1; }

/* ============================================================
   输入框
   ============================================================ */
.input-group { margin-bottom: 16px; }
.input-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.glass-input {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px;
  font-family: inherit;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  transition: all 0.25s var(--ease-smooth);
}
.glass-input::placeholder { color: var(--text-tertiary); }
.glass-input:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 0 0 4px rgba(10, 132, 255, 0.12);
}

/* ============================================================
   液态玻璃按钮（核心）
   ============================================================ */
.btn-glass {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 15px 24px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  box-shadow: 0 4px 20px rgba(10, 132, 255, 0.35);
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s var(--ease-smooth);
}
/* 液态光泽扫过效果 */
.btn-glass::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.35), transparent);
  transition: left 0.6s var(--ease-smooth);
}
.btn-glass:active {
  transform: scale(0.94);
  box-shadow: 0 2px 10px rgba(10, 132, 255, 0.3);
}
.btn-glass:hover::after { left: 120%; }

.btn-glass.secondary {
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  color: var(--accent);
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  box-shadow: var(--glass-shadow-sm);
}
.btn-glass.secondary:active {
  transform: scale(0.94);
}

.btn-glass.success {
  background: linear-gradient(135deg, #34C759, #30D158);
  box-shadow: 0 4px 20px rgba(52, 199, 89, 0.35);
}

.btn-glass:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ============================================================
   兑换结果卡片
   ============================================================ */
.result-card {
  position: relative;
  padding: 24px;
  margin-top: 20px;
  text-align: center;
  animation: popIn 0.45s var(--ease-spring);
}
@keyframes popIn {
  0%   { opacity: 0; transform: scale(0.85) translateY(10px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}
.result-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #34C759, #30D158);
  box-shadow: 0 4px 16px rgba(52, 199, 89, 0.35);
}
.result-icon svg { width: 28px; height: 28px; color: #fff; }
.result-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}
.result-card .result-product {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 18px;
}
.result-content-box {
  position: relative;
  padding: 18px;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  text-align: left;
  margin-bottom: 16px;
  word-break: break-all;
  white-space: pre-wrap;
  font-size: 15px;
  line-height: 1.6;
  max-height: 260px;
  overflow-y: auto;
}
.copy-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #34C759, #30D158);
  box-shadow: 0 4px 20px rgba(52, 199, 89, 0.35);
  cursor: pointer;
  transition: transform 0.3s var(--ease-spring);
}
.copy-btn:active { transform: scale(0.94); }
.copy-btn svg { width: 18px; height: 18px; }
.copy-btn.copied {
  background: linear-gradient(135deg, #0A84FF, #5E5CE6);
}

/* ============================================================
   查询结果
   ============================================================ */
.query-result {
  margin-top: 20px;
}
.query-item {
  position: relative;
  padding: 16px 18px;
  margin-bottom: 12px;
}
.query-item .qi-label {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}
.query-item .qi-value {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
}
.query-item .qi-time {
  font-size: 13px;
  color: var(--text-secondary);
}
.badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 20px;
  margin-left: 6px;
}
.badge.master { background: rgba(255, 149, 0, 0.15); color: #b87a00; }
.badge.normal { background: rgba(10, 132, 255, 0.12); color: var(--accent); }

/* ============================================================
   FAQ 折叠面板
   ============================================================ */
.faq-item {
  position: relative;
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  cursor: pointer;
  user-select: none;
}
.faq-question {
  font-size: 15px;
  font-weight: 600;
  flex: 1;
  padding-right: 12px;
}
.faq-toggle {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s var(--ease-smooth);
}
.faq-item.open .faq-toggle { transform: rotate(45deg); }
.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  transition: max-height 0.35s var(--ease-smooth), padding 0.35s var(--ease-smooth);
}
.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 20px 18px;
}

/* ============================================================
   Toast 提示
   ============================================================ */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: rgba(30, 30, 32, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: 100px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  z-index: 9999;
  opacity: 0;
  transition: transform 0.4s var(--ease-spring), opacity 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 90%;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}
.toast.error { background: rgba(255, 59, 48, 0.9); }
.toast.success { background: rgba(52, 199, 89, 0.9); }

/* ============================================================
   状态提示
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-tertiary);
}
.empty-state svg { width: 48px; height: 48px; margin-bottom: 12px; opacity: 0.4; }

/* ---------- 视图切换 ---------- */
.view { display: none; }
.view.active { display: block; }

/* ---------- 底部版权 ---------- */
.footer {
  text-align: center;
  padding: 20px;
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ---------- 响应式（平板及以上） ---------- */
@media (min-width: 768px) {
  .container { max-width: 520px; }
  body { padding-top: 10px; }
}

/* ---------- 滚动条美化 ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 3px; }