.page-faq {
  --faq-track: 240px;
  --faq-pad: clamp(1.5rem, 5vw, 2.8rem);
  background: var(--ink);
  color: var(--cold);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--rule-soft);
  padding-block: clamp(1.4rem, 4vw, 2.4rem) clamp(2rem, 6vw, 3.6rem);
}

.page-faq .faq-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  opacity: .3;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 19, 16, .58) 0%, rgba(11, 19, 16, .9) 58%, var(--ink) 100%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
}

.page-faq .faq-hero__inner .eyebrow {
  margin-top: clamp(1.1rem, 4vw, 2rem);
}

.page-faq h1 {
  margin: .6rem 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: var(--step-h1);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--cold);
}

.page-faq .faq-hero__lead {
  margin: 1.1rem 0 0;
  max-width: 52ch;
  font-size: var(--step-body);
  line-height: 1.78;
  color: rgba(244, 247, 243, .76);
}

/* ---------- 分组跳转 ---------- */
.page-faq .faq-jump {
  margin-top: clamp(1.8rem, 5vw, 2.8rem);
}

.page-faq .faq-jump ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--rule-soft);
  border: 1px solid var(--rule-soft);
}

.page-faq .faq-jump a {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  padding: .8rem .85rem;
  background: rgba(20, 26, 23, .92);
  color: var(--cold);
  font-size: .875rem;
  text-decoration: none;
  transition: background-color .2s ease, color .2s ease;
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  background: var(--grass);
  color: var(--neon);
}

.page-faq .faq-jump__num {
  flex: none;
  font-family: var(--font-num);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--gold);
}

/* ---------- 正文骨架 ---------- */
.page-faq .faq-body {
  padding-block: clamp(2rem, 6vw, 3.4rem) var(--pad-block);
}

.page-faq .faq-group {
  border-top: 1px solid var(--rule-soft);
  padding-block: clamp(1.6rem, 5vw, 2.8rem);
  scroll-margin-top: 7rem;
}

.page-faq .wrap > .faq-group:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-group--airy {
  padding-block: clamp(2.8rem, 8vw, 5.2rem);
}

.page-faq .faq-group:target .faq-group__title {
  color: var(--neon);
}

.page-faq .faq-group:target .faq-group__num {
  opacity: 1;
}

/* ---------- 左轨 ---------- */
.page-faq .faq-group__rail {
  display: grid;
  gap: .55rem;
  align-content: start;
  margin-bottom: 1.4rem;
}

.page-faq .faq-group__num {
  font-family: var(--font-num);
  font-size: clamp(1.9rem, 7vw, 3rem);
  line-height: .9;
  letter-spacing: -.02em;
  color: var(--neon);
  opacity: .72;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--step-h2);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--cold);
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 34ch;
  font-size: .875rem;
  line-height: 1.72;
  color: rgba(244, 247, 243, .58);
}

.page-faq .faq-group__note a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 181, 74, .45);
}

.page-faq .faq-group__note a:hover {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--rule-soft);
  border-left: 2px solid transparent;
  transition: border-color .24s ease, background-color .24s ease;
}

.page-faq .faq-item:first-of-type {
  border-top: 1px solid var(--rule-soft);
}

.page-faq .faq-item:has(.faq-q[aria-expanded="true"]) {
  border-left-color: var(--neon);
  background: linear-gradient(90deg, rgba(91, 227, 122, .07), transparent 44%);
}

.page-faq .faq-item__q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 18px;
  align-items: center;
  gap: 1rem;
  width: 100%;
  margin: 0;
  padding: 1.05rem .9rem 1.05rem .9rem;
  background: none;
  border: 0;
  font-family: inherit;
  font-size: 1.0125rem;
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: -.005em;
  color: var(--cold);
  text-align: left;
  cursor: pointer;
  transition: color .2s ease;
}

.page-faq .faq-q:hover {
  color: var(--neon);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.page-faq .faq-q__mark {
  position: relative;
  justify-self: end;
  width: 18px;
  height: 18px;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: var(--gold);
  transition: transform .24s cubic-bezier(.22, .61, .36, 1), opacity .24s ease, background-color .24s ease;
}

.page-faq .faq-q__mark::before {
  top: 8.25px;
  left: 0;
  width: 18px;
  height: 1.5px;
}

.page-faq .faq-q__mark::after {
  top: 0;
  left: 8.25px;
  width: 1.5px;
  height: 18px;
}

.page-faq .faq-q[aria-expanded="true"] .faq-q__mark::before {
  background: var(--neon);
}

.page-faq .faq-q[aria-expanded="true"] .faq-q__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-a {
  padding: 0 .9rem 1.3rem;
  font-size: .9688rem;
  line-height: 1.8;
  color: rgba(244, 247, 243, .74);
}

.page-faq .faq-a p {
  margin: 0 0 .75rem;
  max-width: 62ch;
}

.page-faq .faq-a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-a a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-field {
  display: inline-block;
  margin-right: .35rem;
  padding: .1rem .42rem;
  font-family: var(--font-num);
  font-size: .6875rem;
  letter-spacing: .12em;
  color: var(--ink);
  background: var(--paper);
}

/* ---------- iOS 章节里的竖图 ---------- */
.page-faq .faq-figure {
  margin: 1.6rem 0 .4rem;
}

.page-faq .faq-figure__frame {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--tier);
  border: 1px solid var(--rule-soft);
}

.page-faq .faq-figure__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .94;
}

.page-faq .faq-figure__caption {
  margin-top: .7rem;
  font-size: .8125rem;
  line-height: 1.62;
  color: rgba(244, 247, 243, .55);
}

/* ---------- 收尾的暖纸区 ---------- */
.page-faq .faq-group--closing {
  background: var(--paper);
  color: var(--ink);
  border-top: 0;
  border-radius: 2px;
  padding: var(--faq-pad);
  margin-block: clamp(1.6rem, 5vw, 3rem) 0;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .5);
}

.page-faq .faq-group--closing .faq-group__num {
  color: rgba(11, 19, 16, .26);
  opacity: 1;
}

.page-faq .faq-group--closing .faq-group__title {
  color: var(--ink);
}

.page-faq .faq-group--closing .faq-group__note {
  color: rgba(11, 19, 16, .62);
}

.page-faq .faq-group--closing .faq-group__note a {
  color: var(--grass);
  border-bottom-color: rgba(18, 50, 37, .4);
}

.page-faq .faq-group--closing .faq-group__note a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.page-faq .faq-group--closing .faq-item,
.page-faq .faq-group--closing .faq-item:first-of-type {
  border-color: var(--ink-rule);
}

.page-faq .faq-group--closing .faq-item:has(.faq-q[aria-expanded="true"]) {
  border-left-color: var(--grass);
  background: linear-gradient(90deg, rgba(18, 50, 37, .09), transparent 48%);
}

.page-faq .faq-group--closing .faq-q {
  color: var(--ink);
}

.page-faq .faq-group--closing .faq-q:hover {
  color: var(--grass);
}

.page-faq .faq-group--closing .faq-q__mark::before,
.page-faq .faq-group--closing .faq-q__mark::after {
  background: var(--grass);
}

.page-faq .faq-group--closing .faq-a {
  color: rgba(11, 19, 16, .76);
}

.page-faq .faq-group--closing .faq-a a {
  color: var(--grass);
}

.page-faq .faq-group--closing:target .faq-group__title {
  color: var(--grass);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-jump ol {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-group {
    display: grid;
    grid-template-columns: var(--faq-track) minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3.2rem);
    align-items: start;
  }

  .page-faq .faq-group__rail {
    position: sticky;
    top: 6.5rem;
    margin-bottom: 0;
  }

  .page-faq .faq-jump ol {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-faq .faq-group--ios .faq-group__list {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    column-gap: clamp(1.5rem, 3.5vw, 2.6rem);
    align-items: start;
  }

  .page-faq .faq-group--ios .faq-item {
    grid-column: 1;
  }

  .page-faq .faq-group--ios .faq-figure {
    grid-column: 2;
    grid-row: 1 / span 3;
    position: sticky;
    top: 6.5rem;
    margin: 1rem 0 0;
  }

  .page-faq .faq-group--closing {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    padding: clamp(2rem, 4vw, 3.2rem);
  }
}

@media (min-width: 1180px) {
  .page-faq h1 {
    max-width: 26ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .faq-q__mark::before,
  .page-faq .faq-q__mark::after,
  .page-faq .faq-jump a {
    transition: none;
  }
}