.page-faq {
  --faq-sticky: 112px;
  padding-top: clamp(20px, 4vw, 40px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  padding-bottom: clamp(30px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-head);
  font-size: var(--step-3);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -.012em;
  color: var(--paper);
  max-width: 22ch;
}

.page-faq .faq-hero__text .lede {
  max-width: 62ch;
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__quick a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 14px;
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--cyan-soft);
  text-decoration: none;
  border: 1px solid rgba(47, 240, 200, .35);
  border-radius: 999px;
  background: rgba(47, 240, 200, .05);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-hero__quick a::before {
  content: "↓";
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

.page-faq .faq-hero__quick a:hover,
.page-faq .faq-hero__quick a:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  background: rgba(47, 240, 200, .14);
}

.page-faq .faq-hero__art {
  margin: 0;
}

.page-faq .faq-hero__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 3px;
  box-shadow: 10px 10px 0 rgba(19, 44, 37, .85);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  padding-top: clamp(34px, 6vw, 68px);
}

/* ---------- 左侧问题索引 ---------- */
.page-faq .faq-index {
  border-left: 2px solid var(--line);
  padding-left: clamp(14px, 2vw, 22px);
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--violet-ink);
}

.page-faq .faq-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 11px;
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--paper);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(19, 44, 37, .6);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan-soft);
  border-color: var(--cyan);
  background: rgba(47, 240, 200, .08);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-index__sub {
  display: none;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 132px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 7vw, 84px);
  padding-top: clamp(32px, 5vw, 52px);
  border-top: 1px dashed var(--line);
}

.page-faq .faq-group__head {
  display: flex;
  gap: 14px;
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-faq .faq-group__rule {
  flex: 0 0 4px;
  border-radius: 2px;
  background: var(--cyan);
}

.page-faq .faq-group--amber .faq-group__rule {
  background: var(--amber);
}

.page-faq .faq-group--violet .faq-group__rule {
  background: var(--violet);
}

.page-faq .faq-group__meta {
  min-width: 0;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: var(--step-2);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-group__note {
  margin: 7px 0 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 问答折叠 ---------- */
.page-faq .faq-q {
  margin-bottom: 8px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(19, 44, 37, .5);
  overflow: hidden;
  scroll-margin-top: 132px;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-q[open] {
  background: rgba(19, 44, 37, .94);
  border-color: rgba(47, 240, 200, .35);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-faq .faq-q .panel__summary {
  font-family: var(--font-head);
  font-size: clamp(15.5px, 1.5vw, 18px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
  padding: clamp(13px, 2vw, 17px) clamp(15px, 2.4vw, 22px);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-q .panel__summary:hover {
  color: var(--cyan-soft);
}

.page-faq .faq-q__num {
  margin-right: 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 400;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-faq .faq-q .panel__body {
  padding-top: 0;
}

.page-faq .faq-q .panel__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.page-faq .faq-q .panel__body p + p {
  margin-top: 10px;
}

.page-faq .faq-q .panel__body a {
  color: var(--cyan-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-q .panel__body a:hover {
  color: var(--cyan);
}

.page-faq .faq-q .panel__body strong {
  font-family: var(--font-mono);
  font-size: .96em;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--amber);
}

/* ---------- 组内配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(18px, 3vw, 28px);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 3px;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 联系卡片 ---------- */
.page-faq .faq-contact {
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  border-radius: 3px;
  padding: clamp(20px, 3vw, 30px);
  background: linear-gradient(135deg, rgba(155, 108, 255, .12), rgba(19, 44, 37, .75) 62%);
}

.page-faq .faq-contact__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
}

.page-faq .faq-contact__list {
  display: grid;
  gap: 16px;
  margin: 20px 0 0;
}

.page-faq .faq-contact__row {
  min-width: 0;
}

.page-faq .faq-contact__key {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .faq-contact__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.6vw, 17px);
  letter-spacing: .02em;
  line-height: 1.5;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact .hint {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  color: var(--warn);
}

/* ---------- 收尾入口 ---------- */
.page-faq .faq-next {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  margin-top: clamp(48px, 8vw, 90px);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-next__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: var(--step-1);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-next__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 860px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-faq .faq-contact__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px 24px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(190px, 23%) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 80px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
    max-height: calc(100vh - var(--faq-sticky) - 24px);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding-right: 6px;
  }

  .page-faq .faq-index__list {
    display: block;
  }

  .page-faq .faq-index__item + .faq-index__item {
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px dashed var(--line);
  }

  .page-faq .faq-index__link {
    padding: 0;
    border: 0;
    border-radius: 0;
    background: none;
    font-family: var(--font-head);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: .01em;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: none;
    color: var(--cyan-soft);
  }

  .page-faq .faq-index__sub {
    display: grid;
    gap: 2px;
    margin: 8px 0 0;
    padding: 0;
    list-style: none;
  }

  .page-faq .faq-index__sub a {
    display: block;
    padding: 4px 8px 4px 14px;
    font-size: 13px;
    line-height: 1.5;
    color: var(--muted);
    text-decoration: none;
    border-left: 1px solid transparent;
    transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  }

  .page-faq .faq-index__sub a:hover,
  .page-faq .faq-index__sub a:focus-visible {
    color: var(--cyan-soft);
    border-left-color: var(--cyan);
  }

  .page-faq .faq-next {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__quick a,
  .page-faq .faq-index__link,
  .page-faq .faq-q,
  .page-faq .faq-q .panel__summary,
  .page-faq .faq-index__sub a {
    transition: none;
  }
}