/* ============================================================
   Landing Engage — 落地頁黏性互動列（降跳出 Tier 1）
   只在 SEO 落地頁注入。提供「估運費/稅金、你要寄什麼、查稅則」三個
   零摩擦動作；任一點擊即觸發互動(clicks>=2 → 非跳出)並導向工具/搜尋。
   結構/樣式/行為分離：本檔僅樣式。
   ============================================================ */
:root {
  --le-indigo: #6366f1;
  --le-violet: #8b5cf6;
  --le-ink: #1f2937;
  --le-gray: #64748b;
  --le-line: #e2e8f0;
  --le-bg: #ffffff;
  --le-shadow: 0 12px 32px -8px rgba(15, 23, 42, 0.28);
}

/* 黏性列：手機置底滿版、桌機置底置中膠囊 */
.le-bar {
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%) translateY(8px);
  z-index: 9000;
  display: flex;
  align-items: stretch;
  gap: 6px;
  padding: 6px;
  background: var(--le-bg);
  border: 1px solid var(--le-line);
  border-radius: 999px;
  box-shadow: var(--le-shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  max-width: calc(100vw - 24px);
}

.le-bar.is-shown { opacity: 1; pointer-events: auto; transform: translateX(-50%) translateY(0); }

.le-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--le-ink);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
  text-decoration: none;
}

.le-btn:hover { background: #f1f5f9; }
.le-btn:focus-visible { outline: 3px solid rgba(99, 102, 241, 0.4); outline-offset: 2px; }

.le-btn--primary {
  color: #fff;
  background: linear-gradient(90deg, var(--le-indigo), var(--le-violet));
}
.le-btn--primary:hover { filter: brightness(1.05); background: linear-gradient(90deg, var(--le-indigo), var(--le-violet)); }

.le-btn__emoji { font-size: 1.05rem; line-height: 1; }

.le-bar__close {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--le-gray);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  padding: 0 8px;
  align-self: center;
  border-radius: 50%;
}
.le-bar__close:hover { color: var(--le-ink); }

/* 背板 + 底部抽屜（sheet） */
.le-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9400;
  background: rgba(15, 23, 42, 0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.le-backdrop.is-open { opacity: 1; pointer-events: auto; }

.le-sheet {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%) translateY(100%);
  z-index: 9500;
  width: min(560px, 100vw);
  background: var(--le-bg);
  border-radius: 20px 20px 0 0;
  box-shadow: var(--le-shadow);
  padding: 20px 20px calc(20px + env(safe-area-inset-bottom, 0px));
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 80vh;
  overflow-y: auto;
}
.le-sheet.is-open { transform: translateX(-50%) translateY(0); }

.le-sheet__grab {
  width: 40px;
  height: 4px;
  border-radius: 4px;
  background: var(--le-line);
  margin: 0 auto 14px;
}

.le-sheet__title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--le-ink);
  margin: 0 0 4px;
}
.le-sheet__sub { font-size: 0.85rem; color: var(--le-gray); margin: 0 0 16px; }

/* 情境分流 chips */
.le-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.le-chip {
  appearance: none;
  border: 1px solid var(--le-line);
  background: #f8fafc;
  color: var(--le-ink);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.15s ease;
  text-decoration: none;
}
.le-chip:hover { border-color: var(--le-indigo); background: #fff; transform: translateY(-1px); }
.le-chip:focus-visible { outline: 3px solid rgba(99, 102, 241, 0.4); outline-offset: 2px; }

/* 迷你試算器 */
.le-calc { display: flex; flex-direction: column; gap: 14px; }
.le-field { display: flex; flex-direction: column; gap: 6px; }
.le-field__label { font-size: 0.82rem; font-weight: 600; color: var(--le-gray); }
.le-input {
  font: inherit;
  font-size: 1rem;
  padding: 12px 14px;
  border: 1px solid var(--le-line);
  border-radius: 12px;
  width: 100%;
  box-sizing: border-box;
}
.le-input:focus { outline: none; border-color: var(--le-indigo); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15); }

.le-calc__result {
  background: linear-gradient(135deg, #eef2ff, #faf5ff);
  border: 1px solid #e0e7ff;
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 0.95rem;
  color: var(--le-ink);
  display: none;
}
.le-calc__result.is-shown { display: block; }
.le-calc__num { font-size: 1.5rem; font-weight: 800; color: var(--le-indigo); }
.le-calc__note { font-size: 0.75rem; color: var(--le-gray); margin-top: 6px; }

.le-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  box-sizing: border-box;
  padding: 13px 18px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(90deg, var(--le-indigo), var(--le-violet));
  text-decoration: none;
  border: 0;
  cursor: pointer;
}
.le-cta:hover { filter: brightness(1.05); }
.le-cta--ghost { color: var(--le-indigo); background: #fff; border: 1.5px solid var(--le-indigo); }

/* 手機：黏性列改置底滿版 */
@media (max-width: 640px) {
  .le-bar {
    left: 8px;
    right: 8px;
    bottom: 8px;
    transform: translateY(8px);
    border-radius: 16px;
    justify-content: space-between;
    max-width: none;
  }
  .le-bar.is-shown { transform: translateY(0); }
  .le-btn { padding: 10px 10px; font-size: 0.82rem; flex: 1; justify-content: center; }
  .le-btn__text-long { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .le-bar, .le-sheet, .le-backdrop { transition: none; }
}