.page-faq {
  --faq-aside: 286px;
  --faq-line: 2px;
  background: var(--void);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--faq-line) solid var(--edge);
  background:
    radial-gradient(circle at 84% 16%, rgba(0, 231, 210, .14), transparent 46%),
    radial-gradient(circle at 6% 96%, rgba(255, 92, 31, .10), transparent 44%),
    var(--void);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(36, 49, 73, .5) 0 1px, transparent 1px 68px),
    repeating-linear-gradient(90deg, rgba(36, 49, 73, .5) 0 1px, transparent 1px 68px);
  opacity: .55;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: 40px;
  padding-bottom: 36px;
}

.page-faq .faq-hero .crumb {
  margin-bottom: 26px;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(28px, 7vw, 52px);
  line-height: 1.16;
  letter-spacing: -.01em;
  max-width: 20em;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--dim);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-faq .faq-hero__stats > li {
  border-top: 3px solid var(--cyan);
  padding-top: 12px;
}

.page-faq .faq-hero__stats > li:nth-child(2) {
  border-top-color: var(--orange);
}

.page-faq .faq-hero__stats > li:nth-child(3) {
  border-top-color: var(--gold);
}

.page-faq .faq-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 8vw, 40px);
  font-weight: 600;
  letter-spacing: .02em;
  line-height: 1.1;
  color: var(--text);
}

.page-faq .faq-stat__unit {
  font-size: .5em;
  color: var(--dim);
  margin-left: 4px;
}

.page-faq .faq-stat__label {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--dim);
}

/* ---------- 分栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  padding-top: 40px;
  padding-bottom: 64px;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  align-self: start;
  border: var(--faq-line) solid var(--edge);
  background: var(--panel);
  padding: 20px 18px;
}

.page-faq .faq-index__label {
  margin: 0 0 14px;
}

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

.page-faq .faq-index__list li + li {
  margin-top: 2px;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 10px 11px 12px;
  border-left: 3px solid transparent;
  color: var(--text);
  text-decoration: none;
  font-size: 14.5px;
  line-height: 1.5;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  background: var(--steel);
  border-left-color: var(--cyan);
  color: var(--cyan);
  outline: none;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--dim);
  flex: 0 0 auto;
}

.page-faq .faq-index__contact {
  margin-top: 24px;
  padding-top: 18px;
  border-top: var(--faq-line) solid var(--edge);
}

.page-faq .faq-index__line {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .01em;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-faq .faq-index__note {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--dim);
}

.page-faq .faq-index__btn {
  margin-top: 16px;
  width: 100%;
  justify-content: center;
}

/* ---------- 问答区块 ---------- */
.page-faq .faq-block + .faq-block {
  margin-top: 56px;
}

.page-faq .faq-block__head {
  border-top: 3px solid var(--edge-strong);
  padding-top: 18px;
  margin-bottom: 24px;
}

.page-faq .faq-block__head .label {
  display: block;
  color: var(--dim);
}

.page-faq .faq-block__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 5.4vw, 34px);
  line-height: 1.24;
  letter-spacing: -.01em;
}

.page-faq .faq-block__lead {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--dim);
}

.page-faq .faq-figure {
  margin: 0 0 26px;
}

.page-faq .faq-figure .img-frame {
  border: var(--faq-line) solid var(--edge);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, .45);
}

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

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  line-height: 1.7;
  color: var(--dim);
}

/* 折叠问答 */
.page-faq .faq-item {
  border: var(--faq-line) solid var(--edge);
  background: var(--panel);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .42);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

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

.page-faq .faq-item[open] {
  border-color: var(--edge-strong);
  box-shadow: 6px 6px 0 rgba(0, 231, 210, .16);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

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

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

.page-faq .faq-item__q:hover {
  background: var(--steel);
  color: var(--cyan);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.2;
  color: var(--dim);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "–";
  color: var(--cyan);
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-item__a {
  border-top: var(--faq-line) solid var(--edge);
  padding: 14px 16px 16px 42px;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--dim);
}

/* ---------- 横向数据带 ---------- */
.page-faq .faq-band {
  margin: 44px 0;
}

.page-faq .faq-band__inner {
  padding-top: 18px;
  padding-bottom: 18px;
}

.page-faq .faq-band__inner .label {
  display: block;
  margin-bottom: 14px;
}

.page-faq .faq-band__track {
  display: flex;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-band__cell {
  flex: 1 0 168px;
  padding: 4px 16px 4px 0;
  margin-right: 16px;
  border-left: 3px solid var(--cyan);
  padding-left: 14px;
}

.page-faq .faq-band--alt .faq-band__cell {
  border-left-color: var(--orange);
}

.page-faq .faq-band__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--text);
}

.page-faq .faq-band__v {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--dim);
}

/* ---------- 04 纠错的分栏 ---------- */
.page-faq .faq-block__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

/* ---------- 术语速查 ---------- */
.page-faq .faq-glossary {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: var(--faq-line) solid var(--edge);
}

.page-faq .faq-term {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 12px;
  border-bottom: var(--faq-line) solid var(--edge);
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-term:hover {
  background: var(--steel);
}

.page-faq .faq-term__key {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-term__val {
  font-size: 14px;
  line-height: 1.75;
  color: var(--dim);
}

/* ---------- 结尾联系块 ---------- */
.page-faq .faq-cta {
  margin-top: 56px;
  padding: 26px 20px;
}

.page-faq .faq-cta__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 5vw, 30px);
  line-height: 1.26;
}

.page-faq .faq-cta__text {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--dim);
}

.page-faq .faq-cta__contacts {
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .faq-cta__row {
  border-left: 3px solid var(--edge-strong);
  padding-left: 12px;
}

.page-faq .faq-cta__row dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-faq .faq-cta__row dd {
  margin: 5px 0 0;
  font-family: var(--font-mono);
  font-size: 14.5px;
  letter-spacing: .01em;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-faq .faq-cta__actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__inner {
    padding-top: 56px;
    padding-bottom: 48px;
  }

  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }

  .page-faq .faq-glossary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-term {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-faq .faq-cta__contacts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-item__q {
    font-size: 16.5px;
    padding: 17px 20px;
  }

  .page-faq .faq-item__a {
    padding: 16px 20px 18px 52px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-block__split {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-faq .faq-figure--side {
    margin-bottom: 0;
  }

  .page-faq .faq-cta {
    padding: 34px 32px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-aside) minmax(0, 1fr);
    gap: 48px;
    padding-top: 52px;
    padding-bottom: 88px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-faq .faq-block__head {
    padding-top: 22px;
    margin-bottom: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__list a,
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-term {
    transition: none;
  }
}