.page-faq {
  --faq-rail-w: 248px;
  --faq-panel: rgba(18, 32, 60, 0.72);
  --faq-panel-open: rgba(18, 32, 60, 0.94);
  --faq-line: rgba(243, 237, 226, 0.14);
  --faq-deep: rgba(5, 10, 22, 0.5);
  --faq-sticky-top: 96px;
}

.page-faq__crumbs {
  padding-top: 22px;
}

.page-faq__hero {
  padding: 26px 0 44px;
}

.page-faq .page-faq__hero-grid {
  row-gap: 30px;
  align-items: start;
}

.page-faq__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.1rem, 6.6vw, 4.2rem);
  line-height: 1.03;
  letter-spacing: -0.012em;
  color: var(--paper-50);
  margin: 14px 0 20px;
  overflow-wrap: break-word;
}

.page-faq__lead {
  max-width: 54ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--paper-100);
  margin: 0;
}

.page-faq .page-faq__quick {
  border: 1px solid var(--faq-line);
  padding: 20px 22px;
}

.page-faq .page-faq__quick .panel__label {
  color: var(--cyan-400);
}

.page-faq__quick-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq__quick-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--paper-100);
}

.page-faq__quick-list .mono {
  flex: none;
  color: var(--orange-500);
  font-size: 0.74rem;
  line-height: 1.9;
  letter-spacing: 0.06em;
}

/* ---------- 主布局：索引 + 问答 ---------- */

.page-faq .page-faq__body {
  padding-top: 8px;
}

.page-faq .guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-faq .guide-rail {
  border-top: 1px solid var(--line-soft);
  padding-top: 16px;
}

.page-faq .guide-rail__label {
  margin: 0 0 12px;
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--slate-400);
}

.page-faq .guide-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
}

.page-faq .guide-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 12px;
  border-left: 2px solid var(--line-soft);
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--slate-400);
  text-decoration: none;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-faq .guide-rail__link:hover,
.page-faq .guide-rail__link:focus-visible,
.page-faq .guide-rail__link[aria-current="true"] {
  color: var(--paper-50);
  border-left-color: var(--cyan-400);
  background: rgba(47, 227, 208, 0.06);
}

.page-faq .guide-rail__num {
  flex: none;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--slate-400);
  transition: color 0.22s var(--ease);
}

.page-faq .guide-rail__link:hover .guide-rail__num,
.page-faq .guide-rail__link:focus-visible .guide-rail__num,
.page-faq .guide-rail__link[aria-current="true"] .guide-rail__num {
  color: var(--cyan-400);
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding-bottom: 44px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: none;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 10px;
}

.page-faq .faq-group__num {
  flex: none;
  font-size: 0.92rem;
  letter-spacing: 0.1em;
  color: var(--orange-500);
}

.page-faq .faq-group__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.6vw, 2.05rem);
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--paper-50);
  margin: 0;
}

.page-faq .faq-group__lead {
  max-width: 60ch;
  margin: 0 0 22px;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--slate-400);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-item {
  border: 1px solid var(--faq-line);
  border-left: 2px solid transparent;
  background: var(--faq-panel);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan-400);
  background: var(--faq-panel-open);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 0.96rem;
  font-weight: 500;
  line-height: 1.62;
  color: var(--paper-50);
}

.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-faq .faq-item__marker {
  flex: none;
  width: 14px;
  text-align: center;
  color: var(--cyan-400);
  font-size: 0.98rem;
  line-height: 1.55;
}

.page-faq .faq-item__marker::before {
  content: "+";
}

.page-faq .faq-item[open] .faq-item__marker::before {
  content: "\2212";
}

.page-faq .faq-item__a {
  padding: 0 18px 18px 44px;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--paper-100);
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
}

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

/* ---------- 步骤条 ---------- */

.page-faq .step-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .step-list__item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 10px 12px;
  border: 1px solid var(--faq-line);
  background: var(--faq-deep);
  font-size: 0.85rem;
  line-height: 1.72;
}

.page-faq .step-list__num {
  flex: none;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  background: var(--orange-500);
  color: var(--ink-950);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1;
}

/* ---------- 插图 ---------- */

.page-faq .faq-media {
  margin: 24px 0 0;
}

.page-faq .faq-media.image-frame {
  aspect-ratio: 3 / 2;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-media .image-frame__caption {
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--paper-100);
}

/* ---------- 联系方式块 ---------- */

.page-faq .faq-contact {
  margin-top: 22px;
  padding: 20px 22px;
  border: 1px solid var(--faq-line);
  background: var(--faq-panel);
}

.page-faq .faq-contact__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: var(--paper-50);
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-contact__list li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--paper-100);
}

.page-faq .faq-contact__k {
  flex: none;
  width: 52px;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--cyan-400);
}

.page-faq .faq-contact__v {
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line);
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--slate-400);
}

.page-faq .faq-contact__cta {
  margin-top: 14px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .guide-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .guide-rail__link {
    padding: 8px 12px 8px 14px;
  }

  .page-faq .faq-item__a {
    padding-left: 46px;
    padding-right: 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .guide-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .guide-rail {
    position: sticky;
    top: var(--faq-sticky-top);
    border-top: none;
    padding-top: 0;
  }

  .page-faq__hero {
    padding: 44px 0 60px;
  }

  .page-faq__lead {
    font-size: 1.04rem;
  }
}

@media (min-width: 1200px) {
  .page-faq .guide-layout {
    gap: 72px;
  }

  .page-faq .faq-group__lead {
    font-size: 0.96rem;
  }
}

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