.page-faq {
  --faq-y: clamp(56px, 8vw, 108px);
  --faq-anchor: calc(var(--rail-h) + 20px);
  background: var(--void);
  color: var(--mist);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-top: clamp(14px, 2vw, 22px);
}

.page-faq .breadcrumb__item,
.page-faq .breadcrumb__item a {
  color: var(--line);
  font-size: 13px;
  text-decoration: none;
}

.page-faq .breadcrumb__item a:hover {
  color: var(--cyan);
}

.page-faq .breadcrumb__item span[aria-current="page"] {
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 0 0 clamp(48px, 7vw, 88px);
  background-color: var(--void);
  background-image:
    linear-gradient(rgba(126, 138, 166, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 138, 166, 0.09) 1px, transparent 1px);
  background-size: 72px 72px, 72px 72px;
  border-bottom: 1px solid var(--line-hair);
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 4vw, 64px);
  margin-top: clamp(28px, 5vw, 56px);
}

.page-faq .faq-hero .kicker {
  color: var(--cyan);
  margin-bottom: 14px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 22px;
  font-size: clamp(32px, 5.4vw, 58px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-faq .faq-hero__lead-text {
  max-width: 58ch;
  margin: 0 0 14px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: rgba(233, 238, 248, 0.78);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-hair);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--line);
}

.page-faq .faq-hero__meta .mono {
  margin-right: 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--lime);
}

.page-faq .faq-hero__side {
  border: 1px solid var(--line-soft);
  background: var(--void-2);
  padding: clamp(20px, 3vw, 28px);
}

.page-faq .faq-hero__side-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-faq .faq-paths {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.page-faq .faq-paths__link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 18px;
  gap: 10px;
  align-items: center;
  padding: 13px 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.45;
  text-decoration: none;
  transition: color var(--dur) ease, padding-left var(--dur) ease;
}

.page-faq .faq-paths__link:hover,
.page-faq .faq-paths__link:focus-visible {
  color: var(--cyan);
  padding-left: 6px;
}

.page-faq .faq-paths__num {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--red);
}

.page-faq .faq-paths__go {
  justify-self: end;
  color: var(--cyan);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: var(--faq-y) 0;
  background: var(--void-2);
  border-bottom: 1px solid var(--line-hair);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
}

.page-faq .faq-index__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--line);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line-hair);
}

.page-faq .faq-index__item {
  width: 100%;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-left: -1px;
  padding: 9px 0 9px 14px;
  border-left: 2px solid transparent;
  color: var(--line);
  font-size: 14px;
  line-height: 1.45;
  text-decoration: none;
  transition: color var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(37, 208, 222, 0.06);
}

.page-faq .faq-index__num {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--red);
}

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

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: var(--faq-anchor);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(48px, 6vw, 88px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--red);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 2.6vw, 28px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .faq-group__note {
  max-width: 58ch;
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(233, 238, 248, 0.6);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: clamp(22px, 3vw, 32px) 0 clamp(18px, 2vw, 26px);
  border: 1px solid var(--line-hair);
  background: var(--void);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 11px 14px;
  border-top: 1px solid var(--line-hair);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--line);
}

.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
}

.page-faq .faq-figure--tall {
  margin: 0;
}

.page-faq .faq-figure--tall img {
  aspect-ratio: 4 / 5;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  margin-top: 6px;
  border-top: 1px solid var(--line-hair);
}

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

.page-faq .faq-list .stack__head {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin: 0;
  padding: 18px 6px;
  border: 0;
  border-left: 2px solid transparent;
  background: transparent;
  color: var(--mist);
  font-family: inherit;
  font-size: clamp(15px, 1.5vw, 16.5px);
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--dur) ease, border-color var(--dur) ease, color var(--dur) ease;
}

.page-faq .faq-list .stack__head:hover {
  background: rgba(37, 208, 222, 0.05);
  border-left-color: rgba(37, 208, 222, 0.45);
}

.page-faq .faq-list .stack__head[aria-expanded="true"] {
  background: linear-gradient(90deg, rgba(37, 208, 222, 0.13), rgba(37, 208, 222, 0));
  border-left-color: var(--cyan);
  color: #fff;
}

.page-faq .faq-list .stack__index {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.12em;
  color: var(--line);
}

.page-faq .faq-list .stack__head[aria-expanded="true"] .stack__index {
  color: var(--cyan);
}

.page-faq .faq-list .stack__icon {
  position: relative;
  display: block;
  width: 16px;
  height: 16px;
  justify-self: end;
}

.page-faq .faq-list .stack__icon::before,
.page-faq .faq-list .stack__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--dur) ease, opacity var(--dur) ease;
}

.page-faq .faq-list .stack__icon::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .faq-list .stack__icon::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}

.page-faq .faq-list .stack__head[aria-expanded="true"] .stack__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-list .stack__inner {
  max-width: 68ch;
  padding: 0 6px 22px 58px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(233, 238, 248, 0.76);
}

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

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

.page-faq .faq-list .stack__inner ul {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-list .stack__inner li {
  position: relative;
  margin-bottom: 7px;
  padding-left: 16px;
}

.page-faq .faq-list .stack__inner li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.74em;
  width: 7px;
  height: 1px;
  background: var(--red);
}

.page-faq .faq-list .stack__inner a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 208, 222, 0.4);
}

.page-faq .faq-list .stack__inner a:hover,
.page-faq .faq-list .stack__inner a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-list .stack__inner .tag {
  margin-right: 6px;
}

/* ---------- 术语速查 ---------- */
.page-faq .faq-glossary {
  padding: var(--faq-y) 0;
  background: var(--cream);
  color: var(--ink);
}

.page-faq .faq-glossary .kicker {
  color: var(--red-deep);
  margin-bottom: 14px;
}

.page-faq .faq-glossary h2 {
  margin: 0 0 16px;
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-glossary__lead {
  max-width: 58ch;
  margin: 0 0 clamp(28px, 4vw, 44px);
  font-size: 15.5px;
  line-height: 1.75;
  color: rgba(27, 22, 19, 0.72);
}

.page-faq .faq-glossary__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(27, 22, 19, 0.16);
  border: 1px solid rgba(27, 22, 19, 0.16);
}

.page-faq .faq-glossary__item {
  background: var(--cream);
  padding: 20px 22px 24px;
  transition: background-color var(--dur) ease;
}

.page-faq .faq-glossary__item:hover {
  background: #FCF8F0;
}

.page-faq .faq-glossary__term {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(27, 22, 19, 0.18);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--red-deep);
}

.page-faq .faq-glossary__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(27, 22, 19, 0.78);
}

/* ---------- 联系 ---------- */
.page-faq .faq-help {
  padding: var(--faq-y) 0;
  background: var(--void);
  border-top: 1px solid var(--line-hair);
}

.page-faq .faq-help .kicker {
  color: var(--cyan);
  margin-bottom: 14px;
}

.page-faq .faq-help h2 {
  margin: 0 0 16px;
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-faq .faq-help__lead {
  max-width: 58ch;
  margin: 0 0 clamp(28px, 4vw, 44px);
  font-size: 15.5px;
  line-height: 1.75;
  color: rgba(233, 238, 248, 0.74);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-hair);
  border: 1px solid var(--line-soft);
}

.page-faq .faq-help__cell {
  background: var(--void-2);
  padding: clamp(20px, 3vw, 28px);
}

.page-faq .faq-help__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-faq .faq-help__value {
  margin: 0 0 10px;
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.page-faq .faq-help__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(233, 238, 248, 0.6);
}

.page-faq .faq-help__foot {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 44px);
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--line-hair);
}

.page-faq .faq-help__sub {
  margin: 0 0 14px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-help__check {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__check li {
  position: relative;
  margin-bottom: 8px;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(233, 238, 248, 0.72);
}

.page-faq .faq-help__check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.74em;
  width: 7px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__links a {
  color: var(--cyan);
  font-size: 14px;
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(37, 208, 222, 0.35);
  transition: border-color var(--dur) ease;
}

.page-faq .faq-help__links a:hover,
.page-faq .faq-help__links a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 680px) {
  .page-faq .faq-glossary__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-help__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-faq .faq-help__foot {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 270px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-layout {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: clamp(44px, 5vw, 88px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-anchor);
    align-self: start;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-glossary__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .page-faq .faq-list .stack__head {
    grid-template-columns: 28px minmax(0, 1fr) 18px;
    gap: 8px;
    padding: 16px 4px;
  }

  .page-faq .faq-list .stack__inner {
    padding: 0 4px 20px 40px;
    font-size: 14.5px;
  }

  .page-faq .faq-list .stack__icon {
    width: 14px;
    height: 14px;
  }

  .page-faq .faq-list .stack__icon::before {
    top: 6px;
    width: 14px;
  }

  .page-faq .faq-list .stack__icon::after {
    left: 6px;
    height: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-paths__link,
  .page-faq .faq-index__link,
  .page-faq .faq-list .stack__head,
  .page-faq .faq-list .stack__icon::before,
  .page-faq .faq-list .stack__icon::after,
  .page-faq .faq-glossary__item,
  .page-faq .faq-help__links a {
    transition: none;
  }
}