.page-faq {
  --faq-gap: clamp(16px, 3vw, 32px);
  --faq-hair: rgba(41, 52, 74, 0.5);
  --faq-grid: rgba(41, 52, 74, 0.62);
  position: relative;
  isolation: isolate;
  background: var(--bg);
  color: var(--paper);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-faq .mono,
.page-faq .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-index,
.page-faq .faq-group,
.page-faq .faq-scope,
.page-faq .faq-followup {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

/* ---------- hero ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(32px, 6vw, 76px) 0 clamp(28px, 4.4vw, 56px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--faq-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--faq-grid) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: radial-gradient(130% 100% at 12% 0%, #000 0%, transparent 70%);
  mask-image: radial-gradient(130% 100% at 12% 0%, #000 0%, transparent 70%);
  pointer-events: none;
  z-index: -2;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: min(640px, 78vw);
  height: min(640px, 78vw);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(29, 107, 255, 0.24) 0%, rgba(53, 225, 228, 0.08) 46%, transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-hero__lead {
  max-width: 46em;
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  font-size: clamp(30px, 5.6vw, 60px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__title::after {
  content: "";
  display: block;
  width: 76px;
  height: 2px;
  margin-top: 22px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
}

.page-faq .faq-hero__lead-text {
  margin: 22px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

/* ---------- 索引 ---------- */

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-index__item {
  background: var(--panel);
}

.page-faq .faq-index__link {
  position: relative;
  display: block;
  height: 100%;
  padding: 18px 18px 22px;
  color: var(--paper);
  text-decoration: none;
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease);
}

.page-faq .faq-index__link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--focus);
}

.page-faq .faq-index__link:hover::after,
.page-faq .faq-index__link:focus-visible::after {
  transform: scaleX(1);
}

.page-faq .faq-index__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}

.page-faq .faq-index__no {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--blue);
}

.page-faq .faq-index__count {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-index__name {
  display: block;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.35;
}

.page-faq .faq-index__desc {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 分组 ---------- */

.page-faq .faq-group__head {
  display: grid;
  gap: 8px;
  padding-bottom: 18px;
  margin-bottom: clamp(20px, 3vw, 30px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
}

.page-faq .faq-group__no {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--blue);
}

.page-faq .faq-group__count {
  font-size: 12px;
  color: var(--mist);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 600;
  letter-spacing: -0.012em;
  line-height: 1.25;
  color: var(--paper);
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

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

.page-faq .faq-figure .media-caption {
  padding: 10px 14px 12px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 展开列表 ---------- */

.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item__heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .disclosure-toggle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  width: 100%;
  padding: 18px 2px;
  background: none;
  border: 0;
  color: var(--paper);
  font-family: inherit;
  font-size: 16.5px;
  font-weight: 500;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color 0.16s var(--ease);
}

.page-faq .disclosure-toggle:hover .disclosure-label {
  color: var(--cyan);
}

.page-faq .disclosure-toggle:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .disclosure-index {
  padding-top: 3px;
  min-width: 2.4em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--blue);
}

.page-faq .disclosure-label {
  min-width: 0;
  transition: color 0.16s var(--ease);
}

.page-faq .disclosure-icon {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.page-faq .disclosure-icon::before,
.page-faq .disclosure-icon::after {
  content: "";
  position: absolute;
  left: 3px;
  right: 3px;
  top: 50%;
  height: 1px;
  background: var(--cyan);
  transition: transform 0.18s var(--ease), opacity 0.18s var(--ease);
}

.page-faq .disclosure-icon::before {
  transform: translateY(-50%);
}

.page-faq .disclosure-icon::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .disclosure-toggle[aria-expanded="true"] .disclosure-icon::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-faq .faq-item__inner {
  display: grid;
  gap: 16px;
  padding: 2px 2px 26px;
  border-top: 1px dashed var(--faq-hair);
  padding-top: 18px;
}

.page-faq .faq-answer {
  background-image: linear-gradient(to bottom, transparent 0, transparent calc(100% - 1px), var(--faq-hair) calc(100% - 1px));
  background-size: 100% 8px;
}

.page-faq .faq-answer p {
  margin: 0;
  max-width: 38em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--paper);
}

.page-faq .faq-aside {
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.page-faq .faq-aside__label {
  margin: 0 0 5px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-aside__val {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-aside .link-arrow {
  font-size: 13px;
}

/* ---------- 适用范围 ---------- */

.page-faq .faq-scope__panel {
  position: relative;
  padding: clamp(22px, 3.6vw, 42px) clamp(18px, 3vw, 40px) clamp(22px, 3.4vw, 38px) clamp(22px, 3.8vw, 48px);
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-faq .faq-scope__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--clay);
  opacity: 0.85;
}

.page-faq .faq-scope__title {
  margin: 12px 0 0;
  font-size: clamp(21px, 2.6vw, 28px);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-scope__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-scope__list li {
  display: grid;
  gap: 5px;
  padding: 14px 12px 14px 2px;
  background: var(--panel);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-scope__key {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-scope__note {
  margin: 18px 0 0;
  max-width: 42em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */

.page-faq .faq-followup__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-followup__title {
  margin: 12px 0 0;
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 600;
  letter-spacing: -0.012em;
  line-height: 1.25;
  color: var(--paper);
}

.page-faq .faq-followup__text {
  margin: 16px 0 22px;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-followup__callout {
  align-self: start;
}

.page-faq .faq-followup__note {
  margin: 10px 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

@media (min-width: 700px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-scope__list li {
    grid-template-columns: 9em minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
    padding-left: 12px;
    padding-right: 16px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-item__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
    gap: clamp(20px, 3vw, 40px);
  }

  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .faq-followup__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-faq .faq-hero__media img {
    aspect-ratio: 1 / 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-index__link::after,
  .page-faq .disclosure-toggle,
  .page-faq .disclosure-label,
  .page-faq .disclosure-icon::before,
  .page-faq .disclosure-icon::after {
    transition: none;
  }
}