/* 第 12 輪：邀請好友面板（referral.js）。沿用 r6-invite 的卡片樣式，這裡只補統計與階梯列表 */
.rf .rf-stat { display:flex; gap:10px; margin:10px 0 4px; }
.rf .rf-stat > div { flex:1; text-align:center; padding:8px 4px; border-radius:10px; background:rgba(127,127,127,.12); }
.rf .rf-stat b { display:block; font-size:22px; }
.rf .rf-stat small { opacity:.75; }
.rf .rf-next { margin:8px 0; font-weight:700; }
.rf .rf-tiers { list-style:none; margin:0; padding:0; max-height:260px; overflow:auto; }
.rf .rf-t { display:grid; grid-template-columns:86px 1fr 22px; gap:8px; align-items:center; padding:7px 4px; border-bottom:1px dashed rgba(127,127,127,.35); font-size:14px; }
.rf .rf-t b { white-space:nowrap; }
.rf .rf-t span { opacity:.9; }
.rf .rf-t i { font-style:normal; color:#2fa86a; font-weight:800; text-align:center; }
.rf .rf-t:not(.got) { opacity:.72; }
/* 熱鍵小字（B／C／H／I）：手機不顯示 */
kbd.hk { font:600 10px/1 system-ui,sans-serif; opacity:.6; margin-left:4px; padding:2px 4px; border:1px solid currentColor; border-radius:4px; vertical-align:middle; }
body.touch kbd.hk { display:none; }