.page-faq {
  --faq-aside-w: 236px;
  --faq-gap: 52px;
  --faq-hero-pad: calc(var(--header-h) + 44px);
}

/* ---------- 顶部 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: var(--faq-hero-pad);
  background: var(--ink);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(to right, var(--line) 0 1px, transparent 1px 96px);
  opacity: 0.45;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  padding-bottom: 34px;
}

.page-faq .faq-breadcrumb {
  margin-bottom: 22px;
}

.page-faq .faq-hero__title {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 4.8vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--chalk);
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  max-width: 62ch;
  color: var(--muted);
  font-size: var(--fs-body);
  line-height: 1.78;
}

.page-faq .faq-hero__band {
  position: relative;
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero__band img {
  display: block;
  width: 100%;
  height: clamp(130px, 22vw, 240px);
  object-fit: cover;
}

/* ---------- 主轴 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding: 40px 0 88px;
}

.page-faq .faq-aside__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-aside__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}

.page-faq .faq-aside__link {
  display: block;
  padding: 9px 10px;
  border-bottom: 2px solid var(--line);
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.page-faq .faq-aside__link:hover {
  color: var(--chalk);
  border-bottom-color: var(--neon-deep);
}

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

.page-faq .faq-aside__link[aria-current] {
  color: var(--ink);
  background: var(--neon);
  border-bottom-color: var(--neon);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  border-top: 3px solid var(--line);
  padding-top: 26px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 62px;
}

.page-faq .faq-group--contact {
  border-top-color: var(--neon);
}

.page-faq .faq-group__head {
  margin-bottom: 20px;
}

.page-faq .faq-group__title {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-h2);
  line-height: 1.18;
  color: var(--chalk);
  letter-spacing: -0.01em;
}

.page-faq .faq-group__lead {
  max-width: 60ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.78;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  position: relative;
  padding-left: 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  background: transparent;
  transition: background 200ms ease;
}

.page-faq .faq-item[open]::before {
  background: var(--neon);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 17px 0 15px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.42;
  color: var(--chalk);
  transition: color 160ms ease;
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary:hover {
  color: var(--neon);
}

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

.page-faq .faq-item__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--neon);
  padding-top: 4px;
}

.page-faq .faq-item__a {
  max-width: 68ch;
  padding: 0 0 22px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

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

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

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

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

/* ---------- 步骤清单 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 9px 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-step:first-child {
  border-top: none;
}

.page-faq .faq-step__no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--neon-deep);
  letter-spacing: 0.04em;
  padding-top: 3px;
}

/* ---------- 提示条 ---------- */
.page-faq .faq-alert {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 16px;
  padding: 10px 12px;
  background: var(--panel);
  border-left: 3px solid var(--alert);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 26px 0 4px;
}

.page-faq .faq-figure .figure__media {
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--panel);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure .figure__cap {
  margin-top: 9px;
  color: var(--muted);
  font-size: var(--fs-note);
  line-height: 1.7;
}

/* ---------- 联系区 ---------- */
.page-faq .faq-contact {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact__key {
  flex: 0 0 auto;
  min-width: 84px;
  color: var(--muted);
  font-size: var(--fs-note);
  letter-spacing: 0.06em;
}

.page-faq .faq-contact__val {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--chalk);
  word-break: break-word;
}

.page-faq .faq-help-note {
  padding-left: 0;
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-aside-w) minmax(0, 1fr);
    gap: var(--faq-gap);
    padding: 54px 0 120px;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
    max-height: calc(100vh - var(--header-h) - 52px);
    overflow-y: auto;
  }

  .page-faq .faq-aside__list {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-faq .faq-aside__link {
    border-bottom: none;
    border-left: 2px solid var(--line);
    padding: 10px 12px;
  }

  .page-faq .faq-aside__link[aria-current] {
    border-left-color: var(--neon);
  }

  .page-faq .faq-hero__inner {
    padding-bottom: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item::before,
  .page-faq .faq-aside__link,
  .page-faq .faq-item > summary {
    transition: none;
  }
}