/* ==========================================================================
   各屏幕样式：载入 / 角色馆 / 详情 / 收藏 / 排行榜 / 结算
   ========================================================================== */

/* ── 载入层 ─────────────────────────────────────────────────────────── */
.boot {
  position: absolute; inset: 0; z-index: 90;
  background: var(--paper);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: var(--sp-5);
  transition: opacity var(--t-slow) var(--ease-expo), visibility 0s linear var(--t-slow);
}
.boot.is-done { opacity: 0; visibility: hidden; }
.boot__frog { position: relative; width: 92px; height: 92px; }
.boot__frog::after {
  content: ""; position: absolute; left: 50%; top: 50%;
  width: 46px; height: 46px; margin: -23px 0 0 -23px;
  border-radius: 50%; background: var(--green);
  animation: bootBob 1.5s var(--ease-breathe) infinite;
}
@keyframes bootBob {
  0%, 100% { transform: translateY(0) scale(1); }
  50%      { transform: translateY(-10px) scale(1.06); }
}
.boot__puff {
  position: absolute; top: 50%; left: 50%;
  width: 16px; height: 16px; margin: -8px 0 0 -8px;
  border-radius: 50%; background: var(--green);
  opacity: 0; animation: bootPuff 2.1s var(--ease-expo) infinite;
}
.boot__puff:nth-child(1) { animation-delay: 0s; }
.boot__puff:nth-child(2) { animation-delay: .35s; }
.boot__puff:nth-child(3) { animation-delay: .70s; }
@keyframes bootPuff {
  0%   { opacity: 0; transform: translate(0,0) scale(.5); }
  25%  { opacity: .5; }
  100% { opacity: 0; transform: translate(-58px,-30px) scale(2.3); }
}
.boot__tip { margin: 0; font-size: var(--fs-small); color: var(--ink-faint); letter-spacing: .08em; }

/* ── 顶栏 ───────────────────────────────────────────────────────────── */
.bar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--sp-4);
}
.bar__back {
  border: none; background: none; padding: 4px 0;
  font-family: var(--font-text); font-size: var(--fs-body);
  font-weight: 800; color: var(--ink); cursor: pointer;
  transition: transform var(--t-tap) var(--ease-back);
}
.bar__back:active { transform: scale(.94); }
.bar__meta {
  font-family: var(--font-num); font-size: var(--fs-small);
  font-weight: 600; color: var(--ink-soft); font-variant-numeric: tabular-nums;
}

/* ── 页面标题 + 余额 ────────────────────────────────────────────────── */
.title-row {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: var(--sp-4); margin-bottom: var(--sp-4);
}
.hero {
  margin: 0; font-family: var(--font-display); font-synthesis: none;
  font-size: var(--fs-hero); font-weight: var(--fw-display);
  letter-spacing: -.02em; line-height: 1.05; color: var(--ink);
}
.wallet {
  text-align: right; flex: none;
  padding: var(--sp-2) var(--sp-3);
  border: var(--bw) solid var(--line);
  border-radius: var(--r-md); background: var(--surface);
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease-expo), transform var(--t-fast) var(--ease-expo);
}
.wallet:hover, .wallet:focus-visible { border-color: var(--green); }
.wallet:active { transform: scale(.96); }
.wallet::after {
  content: '收藏 ›'; display: block; margin-top: 2px;
  font-size: var(--fs-micro); color: var(--green);
}
/* 结算里把本次排气量接上屁球，让一次跑局有去处 */
.btn-craft-inline {
  width: 100%; margin-top: var(--sp-3); padding: var(--sp-3);
  display: flex; align-items: center; justify-content: center; gap: var(--sp-2);
  border: var(--bw) solid var(--green); border-radius: var(--r-md);
  background: #e7f8f0; /* 不支持 color-mix 的旧内核退化色 */
  background: color-mix(in srgb, var(--green) 10%, var(--surface));
  color: var(--green); font: inherit; font-weight: 700; cursor: pointer;
}
.btn-craft-inline em { font-style: normal; font-weight: 400; color: var(--ink-soft); font-size: var(--fs-small); }
.btn-craft-inline:hover {
  background: #d6f2e4;
  background: color-mix(in srgb, var(--green) 18%, var(--surface));
}
.wallet__label { display: block; font-size: var(--fs-micro); font-weight: 700; color: var(--ink-soft); }
.wallet__value {
  display: block; font-family: var(--font-num); font-size: 24px;
  font-weight: 700; line-height: 1.1; font-variant-numeric: tabular-nums;
}

/* ── 列表表头 ───────────────────────────────────────────────────────── */
.list-head {
  display: flex; justify-content: space-between;
  font-size: var(--fs-small); font-weight: 700; color: var(--ink-soft);
  padding-bottom: var(--sp-2); margin-bottom: var(--sp-3);
  border-bottom: var(--bw) solid var(--line-soft);
}

/* ── 角色网格 ───────────────────────────────────────────────────────── */
.grid {
  flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain;
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-3);
  padding-bottom: var(--sp-5);
  -webkit-overflow-scrolling: touch;
}
.card {
  position: relative; display: flex; flex-direction: column;
  padding: var(--sp-3); gap: 2px; text-align: left;
  background: var(--surface);
  border: var(--bw) solid var(--line);
  border-radius: var(--r-md);
  font-family: var(--font-text); color: var(--ink);
  cursor: pointer;
  animation: cardIn var(--t-base) var(--ease-expo) both;
  transition: transform var(--t-tap) var(--ease-back), border-color var(--t-fast) linear;
}
@keyframes cardIn { from { opacity: 0; transform: translateY(14px) scale(.97); } }
.card:active { transform: scale(.97); }
.card.is-using { border-color: var(--green); box-shadow: inset 0 0 0 1px var(--green); }
.card.is-locked .card__art { filter: grayscale(.55) opacity(.72); }
.card__art {
  position: relative;
  height: 118px; margin-bottom: var(--sp-2);
  overflow: hidden;                 /* 隐式行高会按图片原始尺寸撑开，必须裁 */
}
.card__art img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: contain;
}
.card__name { font-size: 17px; font-weight: 900; letter-spacing: .01em; }
.card__sub  { font-size: var(--fs-small); font-weight: 700; color: var(--ink-soft); }
.card__hint { font-size: var(--fs-micro); font-weight: 700; color: var(--ink-faint); min-height: 14px; }
.card.is-using .card__sub { color: var(--green-deep); }

/* ── 角色详情 ───────────────────────────────────────────────────────── */
.detail { flex: 1; min-height: 0; overflow-y: auto; display: flex; flex-direction: column; align-items: center; }
/* 必须有确定宽度：父级是 align-items:center 的纵向 flex，
   只给高度的话本元素宽度会收缩到 0，子图的 max-width:78% 也跟着变成 0。 */
/* 用弹性高度吸收剩余空间：角色图随屏幕长高，而不是在下方留一大片空白。
   不用 justify-content:center，那样内容超高时顶部会被滚出可视区。 */
.detail__art {
  position: relative; width: 100%; flex: 1 1 auto;
  min-height: 190px; max-height: 360px;
  margin-bottom: var(--sp-3); overflow: hidden;
}
.detail__art img {
  position: absolute; inset: 0; margin: auto;
  max-width: 78%; max-height: 100%;
  width: auto; height: auto; object-fit: contain;
  animation: detailIn var(--t-base) var(--ease-back) both;
}
@keyframes detailIn { from { opacity: 0; transform: scale(.9) translateY(10px); } }
.detail__name { margin: 0; font-family: var(--font-display); font-synthesis: none; font-size: var(--fs-title); font-weight: var(--fw-display); }
.detail__trait { margin: var(--sp-1) 0 var(--sp-5); font-size: var(--fs-small); color: var(--ink-soft); }
.detail__stats {
  width: 100%; display: grid; grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-2); margin-bottom: var(--sp-5);
}
.stat {
  background: var(--surface); border: var(--bw) solid var(--line-soft);
  border-radius: var(--r-md); padding: var(--sp-3) var(--sp-2); text-align: center;
}
.stat__label { display: block; font-size: var(--fs-micro); font-weight: 700; color: var(--ink-soft); margin-bottom: 4px; }
.stat__value {
  display: block; font-family: var(--font-num); font-size: var(--fs-num);
  font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.1;
}
.stat__value em { font-size: var(--fs-micro); font-style: normal; color: var(--ink-faint); margin-left: 2px; }
.stat__value--big { font-size: var(--fs-num-xl); }
.detail__act { width: 100%; }

.btn-fart.is-off { background: var(--paper-deep); color: var(--ink-faint); }
.btn-fart.is-ghost { background: var(--surface); color: var(--ink-soft); border: var(--bw) solid var(--line-soft); }
.btn-fart:disabled { cursor: default; }

/* ── 屁球收藏 ───────────────────────────────────────────────────────── */
.collection { flex: 1; min-height: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--sp-4); }
.collection__stage { position: relative; display: grid; place-items: center; padding: var(--sp-5) 0; }
.balloon {
  position: relative; width: 168px; height: 200px;
  border-radius: 50% 50% 46% 46% / 46% 46% 54% 54%;
  background: rgba(255,255,255,.5);
  border: var(--bw) solid rgba(20,33,44,.28);
  backdrop-filter: blur(2px);
  box-shadow: inset 0 -14px 30px rgba(18,183,106,.16), 0 18px 40px rgba(20,33,44,.10);
  animation: float 5.2s var(--ease-breathe) infinite;
  overflow: hidden;
}
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(-1.4deg); }
  50%      { transform: translateY(-16px) rotate(1.4deg); }
}
.balloon__gas {
  position: absolute; border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, #a3e635, #16a34a 70%);
  filter: blur(2px); opacity: .82;
}
.balloon__gas.g1 { width: 78px; height: 70px; left: 14px; bottom: 26px; animation: drift 6.4s var(--ease-breathe) infinite; }
.balloon__gas.g2 { width: 60px; height: 54px; right: 18px; bottom: 44px; animation: drift 5.1s var(--ease-breathe) infinite reverse; }
.balloon__gas.g3 { width: 46px; height: 42px; left: 48px; bottom: 74px; animation: drift 7.3s var(--ease-breathe) infinite; }
.balloon__gas.g4 { width: 34px; height: 30px; right: 42px; bottom: 96px; animation: drift 4.6s var(--ease-breathe) infinite reverse; }
@keyframes drift {
  0%, 100% { transform: translate(0,0) scale(1); opacity: .78; }
  50%      { transform: translate(6px,-10px) scale(1.08); opacity: .92; }
}
.balloon__shine {
  position: absolute; left: 22px; top: 24px; width: 38px; height: 26px;
  border-radius: 50%; background: rgba(255,255,255,.75); filter: blur(3px);
}
.collection__count { margin: 0; font-size: var(--fs-body); font-weight: 800; color: var(--ink-soft); }
.collection__count b { font-family: var(--font-num); font-size: 26px; color: var(--ink); margin-left: 4px; }
/* 累计制作是收藏成就，和可用数量分开：一个能花，一个只是记录 */
.collection__made { margin: 2px 0 0; font-size: var(--fs-micro); color: var(--ink-faint); letter-spacing: .08em; }
.collection__note { margin: 0; font-size: var(--fs-micro); color: var(--ink-faint); letter-spacing: .1em; }

/* ── 排行榜 ─────────────────────────────────────────────────────────── */
.board { flex: 1; min-height: 0; overflow-y: auto; }
.board__note { margin: 0 0 var(--sp-4); font-size: var(--fs-small); color: var(--ink-soft); }
.board__list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--sp-2); }
.board__row {
  display: grid; grid-template-columns: 26px 34px 1fr auto; align-items: center;
  gap: var(--sp-3); padding: var(--sp-3) var(--sp-4);
  background: var(--surface); border: var(--bw) solid var(--line-soft);
  border-radius: var(--r-md);
}
.board__row.is-me { border-color: var(--green); background: var(--green-wash); }
.board__rank { font-family: var(--font-num); font-size: var(--fs-small); font-weight: 700; color: var(--ink-faint); }
.board__face {
  width: 34px; height: 34px; overflow: hidden; border-radius: 50%;
  background: var(--green-wash); display: block; flex: none;
}
.board__face img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 18%; }
.board__foot { margin: var(--sp-5) 0 0; font-size: var(--fs-small); color: var(--ink-soft); line-height: 1.6; }
.board__back { width: 100%; margin-top: var(--sp-4); }
.board__name { font-size: var(--fs-body); font-weight: 800; }
.board__score { font-family: var(--font-num); font-size: 19px; font-weight: 700; font-variant-numeric: tabular-nums; }
.board__score em { font-size: var(--fs-micro); font-style: normal; color: var(--ink-faint); margin-left: 3px; }

/* ── 结算 ───────────────────────────────────────────────────────────── */
.modal {
  position: absolute; inset: 0; z-index: var(--z-modal);
  display: grid; place-items: center;
  padding: var(--sp-5);
  background: rgba(20,33,44,.42);
  backdrop-filter: blur(6px);
  animation: fadeIn var(--t-base) var(--ease-expo) both;
}
@keyframes fadeIn { from { opacity: 0 } }
.modal__card {
  width: 100%; max-width: 340px;
  background: var(--paper);
  border: var(--bw) solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--sp-5) var(--sp-4) var(--sp-4);
  text-align: center;
  animation: modalIn var(--t-slow) var(--ease-back) both;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(24px) scale(.94); } }
.modal__eyebrow {
  margin: 0 0 var(--sp-3); font-family: var(--font-display); font-synthesis: none;
  font-size: 22px; font-weight: var(--fw-display); letter-spacing: .02em;
}
.modal__frog { position: relative; height: 96px; margin-bottom: var(--sp-3); overflow: hidden; }
.modal__frog img {
  position: absolute; inset: 0; margin: auto;
  max-height: 100%; max-width: 70%;
  width: auto; height: auto; object-fit: contain;
  animation: detailIn var(--t-slow) var(--ease-back) both;
}
.modal__rows {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-2);
  background: var(--surface); border: var(--bw) solid var(--line-soft);
  border-radius: var(--r-md); padding: var(--sp-3); margin-bottom: var(--sp-3);
}
.modal__rank {
  display: inline-block; margin: 0 auto var(--sp-4);
  padding: 5px 20px; border-radius: var(--r-pill);
  background: var(--amber-wash); border: var(--bw) solid var(--amber);
  color: #8a5a12; font-size: 17px; font-weight: 900; letter-spacing: .04em;
}
.modal__acts { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-2); }
.btn-ghost--solid { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ── 提示条 ─────────────────────────────────────────────────────────── */
.toast {
  position: absolute; left: 50%; bottom: 92px; z-index: var(--z-toast);
  transform: translate(-50%, 12px);
  padding: 9px 18px; border-radius: var(--r-pill);
  background: var(--ink); color: var(--paper);
  font-size: var(--fs-small); font-weight: 800; letter-spacing: .04em;
  opacity: 0; pointer-events: none;
  transition: opacity var(--t-fast) var(--ease-expo), transform var(--t-fast) var(--ease-back);
}
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* ── 屁球收藏与制作 ─────────────────────────────────────────────────── */
.bank {
  width: 100%;
  background: var(--surface);
  border: var(--bw) solid var(--line);
  border-radius: var(--r-md);
  padding: var(--sp-4);
}
.bank__row {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: var(--sp-3);
}
.bank__label { font-size: var(--fs-small); font-weight: 800; color: var(--ink-soft); }
.bank__value {
  font-family: var(--font-num); font-size: 28px; font-weight: 700;
  font-variant-numeric: tabular-nums; letter-spacing: -.02em;
}
.bank__value em { font-size: var(--fs-micro); font-style: normal; color: var(--ink-faint); margin-left: 3px; }
.bank__track {
  height: 8px; border-radius: var(--r-pill);
  background: var(--paper-deep); overflow: hidden;
}
.bank__fill {
  display: block;                 /* <i> 默认行内，height 会失效 */
  height: 100%; border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--green), #7dd3a0);
  transform-origin: left center;
  transition: width var(--t-base) var(--ease-expo);
}
.bank__hint {
  margin: var(--sp-2) 0 0; font-size: var(--fs-micro);
  color: var(--ink-faint); letter-spacing: .04em;
}
.bank.is-ready { border-color: var(--green); box-shadow: inset 0 0 0 1px var(--green); }

/* 气球随收藏数变大 */
.balloon { --n: 0; transform: scale(calc(.78 + var(--n) * .035)); }

/* 制作成功时炸开的一圈 */
.puff-ring {
  position: absolute; left: 50%; top: 50%;
  width: 40px; height: 40px; margin: -20px 0 0 -20px;
  border: 3px solid var(--green); border-radius: 50%;
  animation: puffOut 620ms var(--ease-expo) forwards; pointer-events: none;
}
@keyframes puffOut {
  from { opacity: .9; transform: scale(.5); }
  to   { opacity: 0;  transform: scale(4.5); }
}

/* ── 解锁仪式 ───────────────────────────────────────────────────────── */
.rite {
  position: absolute; inset: 0; z-index: var(--z-modal);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--sp-4); padding: var(--sp-6);
  background:
    radial-gradient(circle at 50% 40%, rgba(18,183,106,.10), transparent 60%),
    var(--paper);
  animation: fadeIn var(--t-fast) var(--ease-expo) both;
}
/* 旋转光爆：repeating 才有 12 束光；径向遮罩让光在边缘化开，避免硬切三角 */
.rite__rays {
  position: absolute; left: 50%; top: 40%; width: 760px; height: 760px;
  z-index: 0; pointer-events: none;
  transform: translate(-50%, -50%);
  background: repeating-conic-gradient(from 0deg,
    rgba(232,163,61,.26) 0deg 4.5deg, transparent 4.5deg 30deg);
  -webkit-mask-image: radial-gradient(circle, transparent 15%, #000 36%, transparent 66%);
  mask-image: radial-gradient(circle, transparent 15%, #000 36%, transparent 66%);
  animation: riteSpin 26s linear infinite;
}
@keyframes riteSpin { to { transform: translate(-50%, -50%) rotate(360deg) } }
@keyframes spin { to { transform: rotate(360deg) } }
.rite__art {
  position: relative; z-index: 1;
  width: 100%; height: 250px;
  display: flex; align-items: center; justify-content: center;
  animation: riteIn 700ms var(--ease-back) both;
}
/* 角色身后的呼吸光晕，把主体从纸面上托起来 */
.rite__art::before {
  content: ''; position: absolute; inset: -22% -14%;
  border-radius: 50%;
  background: radial-gradient(ellipse at 50% 56%, rgba(18,183,106,.20), transparent 62%);
  animation: glowPulse 2.6s var(--ease-expo) infinite;
}
@keyframes glowPulse {
  0%, 100% { opacity: .55; transform: scale(.94); }
  50%      { opacity: 1;   transform: scale(1.04); }
}
.rite__art img {
  position: relative; z-index: 1;
  width: 100%; height: 100%; object-fit: contain;
  filter: drop-shadow(0 14px 22px rgba(20,33,44,.20));
}
@keyframes riteIn {
  from { opacity: 0; transform: scale(.55) rotate(-8deg); }
  60%  { opacity: 1; }
  to   { opacity: 1; transform: none; }
}
.rite__name {
  position: relative; z-index: 1; margin: 0;
  font-family: var(--font-display); font-synthesis: none;
  font-size: 34px; font-weight: var(--fw-display); letter-spacing: .02em;
  animation: riseIn 600ms var(--ease-expo) 260ms both;
}
.rite__eyebrow {
  position: relative; z-index: 1;
  font-size: var(--fs-micro); letter-spacing: .34em; text-indent: .34em;
  color: var(--green); font-weight: 600;
  animation: riseIn 600ms var(--ease-expo) 200ms both;
}
.rite__trait {
  position: relative; z-index: 1; margin: 0; font-size: var(--fs-body);
  color: var(--ink-soft); animation: riseIn 600ms var(--ease-expo) 360ms both;
}
.rite__acts {
  position: relative; z-index: 1; width: 100%; max-width: 300px; margin-top: var(--sp-3);
  animation: riseIn 600ms var(--ease-expo) 460ms both;
}
/* 刚花掉屁球，得把代价和余额摆出来，仪式才闭合 */
.rite__cost {
  margin: var(--sp-3) 0 0; text-align: center;
  font-size: var(--fs-micro); color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}
.rite__spark {
  position: absolute; left: 50%; top: 40%; z-index: 2;
  width: 10px; height: 10px; margin: -5px 0 0 -5px;
  border-radius: 50%; background: var(--amber); pointer-events: none;
}
@keyframes sparkOut {
  from { opacity: 1; transform: translate(0,0) scale(1); }
  to   { opacity: 0; transform: translate(var(--dx), var(--dy)) scale(.3); }
}
/* 常驻微粒：让仪式在等待点击的那几秒里保持呼吸，而不是静止 */
.rite__mote {
  position: absolute; z-index: 0; border-radius: 50%;
  background: var(--green); opacity: 0; pointer-events: none;
  animation: moteUp var(--dur, 4s) linear var(--delay, 0s) infinite;
}
@keyframes moteUp {
  0%   { opacity: 0; transform: translate(0, 40px) scale(.6); }
  18%  { opacity: .5; }
  70%  { opacity: .35; }
  100% { opacity: 0; transform: translate(var(--dx, 10px), -230px) scale(1.1); }
}

/* ── 首屏引导 ───────────────────────────────────────────────────────── */
.coach {
  position: absolute; inset: 0; z-index: var(--z-modal);
  display: flex; flex-direction: column;
  align-items: center; justify-content: flex-start;
  padding: var(--sp-6) var(--sp-5) 0;
  /* 在排气键上挖一个透明洞：既压暗画面，又让真正要按的东西亮着 */
  background: radial-gradient(circle at 50% var(--hole-y, 88%),
    transparent 0 54px, rgba(246, 243, 234, .55) 62px, rgba(246, 243, 234, .88) 78px);
  animation: fadeIn var(--t-fast) var(--ease-expo) both;
  transition: opacity 220ms var(--ease-expo);
}
.coach.is-out { opacity: 0; pointer-events: none; }
.coach__card {
  width: 100%; max-width: 340px; margin-top: var(--sp-7);
  padding: var(--sp-5); border-radius: var(--r-lg);
  background: var(--surface); border: var(--bw) solid var(--line);
  box-shadow: 0 18px 40px rgba(20, 33, 44, .14);
  animation: riseIn 480ms var(--ease-back) both;
}
.coach__title {
  margin: 0 0 var(--sp-4); font-size: var(--fs-title);
  font-family: var(--font-display); font-synthesis: none;
  font-weight: var(--fw-display); letter-spacing: .01em;
}
.coach__list { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--sp-3); }
.coach__list li {
  position: relative; padding-left: 20px;
  font-size: var(--fs-body); line-height: 1.6; color: var(--ink-soft);
}
.coach__list li::before {
  content: ''; position: absolute; left: 4px; top: .62em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--green);
}
.coach__list b { color: var(--ink); font-weight: 700; }
.coach__card .btn-fart { margin-top: var(--sp-5); }

/* 指向排气键的呼吸圈，位置靠 --ring-y 由 JS 对齐真实按钮 */
.coach__ring {
  position: absolute; left: 50%; bottom: var(--ring-bottom, 92px);
  width: 112px; height: 112px; margin-left: -56px;
  border: 2px solid var(--green); border-radius: 50%;
  pointer-events: none; animation: ringPulse 1.8s var(--ease-expo) infinite;
}
@keyframes ringPulse {
  0%   { opacity: .85; transform: scale(.86); }
  70%  { opacity: 0;   transform: scale(1.18); }
  100% { opacity: 0;   transform: scale(1.18); }
}
.coach__point {
  position: absolute; left: 0; right: 0; text-align: center;
  bottom: var(--point-bottom, 44px);
  margin: 0; font-size: var(--fs-small); font-weight: 700; color: var(--green);
  pointer-events: none;
}
/* 被引导指到的排气键，加一圈光晕 */
.btn-fart.is-hinted { box-shadow: 0 0 0 4px rgba(18, 183, 106, .18), 0 10px 24px rgba(18, 183, 106, .22); }