.page-faq {
  --faq-rail-w: 252px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(34px, 5.5vw, 76px) 0 clamp(30px, 4.4vw, 60px);
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper-white);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--paper);
}

.page-faq .faq-hero__fig {
  margin: 0;
  border: var(--line-thick) solid var(--cyan);
  background: var(--ink-panel);
  box-shadow: 8px 8px 0 rgba(53, 242, 208, 0.26);
  overflow: hidden;
}

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-hero__cap {
  padding: 10px 14px;
  border-top: 2px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  padding-block: clamp(42px, 6vw, 84px);
  border-top: var(--line-thick) solid var(--cyan);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

/* 分类轨道 */
.page-faq .faq-rail {
  border: var(--line-thick) solid var(--black);
  background: var(--ink-panel);
  box-shadow: var(--hard-sm);
  padding: 18px 16px;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
}

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

.page-faq .faq-rail__link {
  display: block;
  padding: 11px 13px;
  border: 2px solid rgba(243, 233, 210, 0.22);
  color: var(--paper-white);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(53, 242, 208, 0.1);
}

.page-faq .faq-rail__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 2px solid rgba(243, 233, 210, 0.2);
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

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

/* 问答组 */
.page-faq .faq-group {
  scroll-margin-top: 84px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 5.5vw, 68px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 6px;
  align-items: baseline;
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: var(--line-thick) solid var(--ink);
}

.page-faq .faq-group__num {
  grid-row: 1 / span 2;
  align-self: start;
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--deep-cyan);
  letter-spacing: 0.02em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 2.8vw, 31px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--ink);
}

.page-faq .faq-group__desc {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  opacity: 0.72;
}

/* 组内配图 */
.page-faq .faq-fig {
  margin: 0 0 24px;
  border: var(--line) solid var(--black);
  background: var(--paper-white);
  box-shadow: var(--hard-sm);
  overflow: hidden;
}

.page-faq .faq-fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-fig__cap {
  padding: 10px 14px;
  border-top: 2px solid var(--black);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink);
  opacity: 0.78;
}

/* 折叠面板外观 */
.page-faq .accordion {
  display: grid;
  gap: 14px;
}

.page-faq .accordion__item {
  border: var(--line) solid var(--black);
  background: var(--paper-white);
  box-shadow: var(--hard-sm);
  transition: box-shadow 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-faq .accordion__item:focus-within {
  transform: translate(-2px, -2px);
  box-shadow: var(--hard);
}

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

.page-faq .accordion__trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 18px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-head);
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 700;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
}

.page-faq .accordion__trigger:hover {
  color: var(--deep-cyan);
}

.page-faq .accordion__label {
  flex: 1 1 auto;
}

.page-faq .accordion__icon {
  flex: 0 0 auto;
  position: relative;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border: 2px solid var(--ink);
  background: var(--paper);
}

.page-faq .accordion__icon::before,
.page-faq .accordion__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--ink);
  transform: translate(-50%, -50%);
}

.page-faq .accordion__icon::before {
  width: 10px;
  height: 2px;
}

.page-faq .accordion__icon::after {
  width: 2px;
  height: 10px;
}

.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon {
  background: var(--cyan);
  border-color: var(--black);
}

.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  opacity: 0;
}

.page-faq .accordion__inner {
  padding: 0 18px 18px;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .accordion__inner p {
  margin: 0 0 10px;
}

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

/* 邮箱复制行 */
.page-faq .faq-mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 14px;
  padding: 12px 14px;
  border: 2px solid var(--black);
  background: var(--paper);
}

.page-faq .faq-mail__addr {
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--ink);
  word-break: break-all;
}

.page-faq .faq-mail__btn {
  flex: 0 0 auto;
}

/* 下一步入口 */
.page-faq .faq-next {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 18px;
  margin-top: 26px;
  padding: 15px 18px;
  background: var(--ink);
  border: var(--line) solid var(--black);
  box-shadow: var(--hard-sm);
  color: var(--paper-white);
  text-decoration: none;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-next:hover,
.page-faq .faq-next:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--hard);
  background: var(--ink-panel);
  color: var(--paper-white);
}

.page-faq .faq-next__label {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
}

.page-faq .faq-next__go {
  flex: 0 0 auto;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-faq .faq-next:hover .faq-next__go,
.page-faq .faq-next:focus-visible .faq-next__go {
  color: var(--cyan);
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 860px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-group__head {
    column-gap: 20px;
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 520px) {
  .page-faq .faq-rail {
    padding: 14px 12px;
  }

  .page-faq .faq-rail__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .accordion__trigger {
    padding: 14px 14px;
    gap: 12px;
  }

  .page-faq .accordion__inner {
    padding: 0 14px 16px;
  }

  .page-faq .faq-next {
    padding: 14px;
  }

  .page-faq .faq-next__go {
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion__item,
  .page-faq .faq-next,
  .page-faq .faq-rail__link {
    transition: none;
  }

  .page-faq .accordion__item:focus-within,
  .page-faq .faq-next:hover,
  .page-faq .faq-next:focus-visible {
    transform: none;
  }
}
<<<END>>>