.page-faq {
  --faq-accent: var(--c-cyan);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .eyebrow {
  margin: 0 0 14px;
}

.page-faq .faq-hero {
  max-width: 900px;
  padding: 32px 0 30px;
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-size: clamp(28px, 6.2vw, 48px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: .02em;
  color: var(--c-text);
}

.page-faq .faq-hero__lede {
  margin: 0 0 24px;
  max-width: 60ch;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--c-text-2);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--c-text-2);
}

.page-faq .faq-hero__meta .mono {
  color: var(--c-cyan);
}

/* ---------- 分屏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-bottom: 72px;
  align-items: start;
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 56px;
  }
}

/* ---------- 左侧题号索引 ---------- */
.page-faq .faq-index {
  padding-top: 18px;
  border-top: 1px solid var(--c-line);
}

@media (min-width: 1000px) {
  .page-faq .faq-index {
    position: sticky;
    top: 88px;
    padding-top: 0;
    border-top: 0;
  }
}

.page-faq .faq-index__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-text-2);
}

.page-faq .faq-index__group + .faq-index__group {
  margin-top: 18px;
}

.page-faq .faq-index__label {
  display: inline-block;
  margin: 0 0 10px;
}

.page-faq .faq-index__list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: block;
  padding: 6px 2px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--c-text-2);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: color var(--t-hover) var(--ease),
              border-color var(--t-hover) var(--ease),
              background var(--t-hover) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--c-cyan);
  border-color: var(--c-cyan);
  background: var(--c-bg-2);
}

/* ---------- 分类分组 ---------- */
.page-faq .faq-group {
  margin-bottom: 56px;
  scroll-margin-top: 92px;
}

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

.page-faq .faq-group--intake { --faq-accent: var(--c-cyan); }
.page-faq .faq-group--hardware { --faq-accent: var(--c-magenta); }
.page-faq .faq-group--columns { --faq-accent: var(--c-amber); }
.page-faq .faq-group--return { --faq-accent: var(--c-mint); }

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px 16px;
  padding-bottom: 14px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-group__title {
  flex: 1 1 auto;
  margin: 0;
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 700;
  letter-spacing: .015em;
  color: var(--c-text);
}

.page-faq .faq-group__count {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--faq-accent);
}

/* ---------- 图示 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 26px;
}

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

.page-faq .faq-figure .media-cap {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-text-2);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--c-line);
  scroll-margin-top: 92px;
}

.page-faq .faq-item__summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 2px;
  cursor: pointer;
  list-style: none;
  transition: background var(--t-hover) var(--ease);
}

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

.page-faq .faq-item__summary::marker {
  content: "";
}

.page-faq .faq-item__summary:hover {
  background: var(--c-bg-2);
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  min-width: 26px;
  padding-top: 3px;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--c-text-2);
  transition: color var(--t-hover) var(--ease);
}

.page-faq .faq-item[open] .faq-item__num,
.page-faq .faq-item__summary:hover .faq-item__num {
  color: var(--faq-accent);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: var(--fs-body);
  font-weight: 600;
  line-height: 1.62;
  color: var(--c-text);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1px solid var(--c-line);
  border-radius: 50%;
  transition: border-color var(--t-hover) var(--ease);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--c-text-2);
  transform: translate(-50%, -50%);
  transition: transform var(--t-state) var(--ease),
              background var(--t-hover) var(--ease);
}

.page-faq .faq-item__mark::before {
  width: 7px;
  height: 1.5px;
}

.page-faq .faq-item__mark::after {
  width: 1.5px;
  height: 7px;
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--faq-accent);
}

.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--faq-accent);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-item__body {
  padding: 0 2px 22px;
}

@media (min-width: 640px) {
  .page-faq .faq-item__body {
    padding-left: 40px;
  }
}

.page-faq .faq-item__body p {
  margin: 0 0 12px;
  max-width: 64ch;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--c-text-2);
}

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

.page-faq .faq-item__more {
  margin-top: 16px !important;
}

.page-faq .faq-item__more a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--faq-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-hover) var(--ease);
}

.page-faq .faq-item__more a::after {
  content: "→";
  font-family: var(--font-mono);
}

.page-faq .faq-item__more a:hover,
.page-faq .faq-item__more a:focus-visible {
  border-bottom-color: currentColor;
}

/* ---------- 联系提示面板 ---------- */
.page-faq .faq-help {
  margin-top: 22px;
  padding: 24px 20px;
  --faq-accent: var(--c-cyan);
}

@media (min-width: 640px) {
  .page-faq .faq-help {
    padding: 32px 30px;
  }
}

.page-faq .faq-help p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--c-text-2);
}

.page-faq .faq-help__list {
  display: grid;
  gap: 9px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-text-2);
}

.page-faq .faq-help__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66em;
  width: 7px;
  height: 1.5px;
  background: var(--faq-accent);
}

.page-faq .faq-help__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin-bottom: 20px;
}

.page-faq .faq-help__contact .contact-item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13.5px;
  color: var(--c-text);
}

.page-faq .faq-help__contact .contact-item__key {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-text-2);
}

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

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item__summary,
  .page-faq .faq-item__num,
  .page-faq .faq-item__mark,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-item__more a {
    transition-duration: .01ms;
  }
}