.page-faq {
  background: var(--c-ink);
  color: var(--c-fog);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-faq .crumb-bar {
  padding-top: clamp(1.25rem, 3vw, 2.25rem);
  padding-bottom: clamp(.5rem, 1.5vw, 1rem);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 3rem) 0 clamp(3rem, 8vw, 6.5rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -32%;
  right: -18%;
  width: 62%;
  height: 150%;
  background: linear-gradient(150deg, rgba(27, 38, 80, .95) 0%, rgba(27, 38, 80, .28) 52%, rgba(11, 20, 54, 0) 100%);
  border-radius: 46% 0 0 58% / 34% 0 0 62%;
  transform: rotate(-12deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--c-copper) 0%, rgba(181, 96, 58, .15) 38%, transparent 72%);
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: end;
}

.page-faq .faq-hero-main .eyebrow {
  margin-bottom: .9rem;
}

.page-faq .faq-title {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(3rem, 10vw, 7.5rem);
  line-height: .92;
  letter-spacing: .09em;
  margin: 0 0 1rem;
  color: var(--c-fog);
}

.page-faq .faq-kicker {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--c-lime);
  margin: 0 0 1.35rem;
}

.page-faq .faq-hero-main .lede {
  max-width: 38em;
  margin: 0;
  color: var(--c-fog);
  opacity: .82;
}

.page-faq .faq-hero-side {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  padding-left: clamp(0rem, 2vw, 1.5rem);
  border-left: 1px solid rgba(138, 148, 168, .22);
}

.page-faq .hero-num {
  font-family: var(--font-mono);
  font-size: clamp(4rem, 13vw, 8.5rem);
  line-height: .8;
  letter-spacing: -.04em;
  color: var(--c-lime);
}

.page-faq .hero-num-label {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .18em;
  color: var(--c-index);
  text-transform: uppercase;
}

/* ---------- 分组标题共用 ---------- */
.page-faq .group-head {
  display: flex;
  align-items: baseline;
  gap: clamp(.75rem, 2vw, 1.25rem);
  padding-bottom: .85rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(1rem, 2vw, 1.5rem);
}

.page-faq .group-idx {
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--c-copper);
  flex: none;
}

.page-faq .group-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: var(--step-2);
  letter-spacing: .03em;
  line-height: 1.2;
  color: var(--c-fog);
}

.page-faq .group-lede {
  margin: 0 0 clamp(1.25rem, 3vw, 2rem);
  max-width: 40em;
  color: var(--c-index);
  line-height: 1.8;
}

.page-faq .group-lede a {
  color: var(--c-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 242, 74, .45);
}

.page-faq .group-lede a:hover {
  border-bottom-color: var(--c-lime);
}

/* ---------- 问题索引 ---------- */
.page-faq .faq-index {
  background: var(--c-carbon);
  padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(2.25rem, 5vw, 4rem);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .idx-cols {
  display: grid;
  gap: 0 clamp(1.25rem, 4vw, 3.5rem);
}

.page-faq .idx-col {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  align-content: start;
}

.page-faq .idx-item a {
  display: flex;
  gap: .85rem;
  align-items: baseline;
  padding: .68rem 0;
  border-bottom: 1px dashed var(--line-soft);
  color: var(--c-fog);
  text-decoration: none;
  font-size: .9375rem;
  line-height: 1.5;
  transition: color .15s ease, border-color .15s ease;
}

.page-faq .idx-item a:hover,
.page-faq .idx-item a:focus-visible {
  color: var(--c-lime);
  border-bottom-color: rgba(198, 242, 74, .5);
}

.page-faq .idx-n {
  flex: none;
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--c-copper);
  padding-top: .1em;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}

.page-faq .faq-group--band {
  background: var(--c-carbon);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa-list {
  display: block;
}

.page-faq .qa {
  border-top: 1px solid var(--line-soft);
  transition: border-color .15s ease;
}

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa[open] {
  border-top-color: rgba(198, 242, 74, .45);
}

/* 摘要行 */
.page-faq .qa-sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: clamp(.75rem, 2.5vw, 1.5rem);
  align-items: center;
  padding: clamp(.9rem, 2.2vw, 1.35rem) 0;
  cursor: pointer;
  list-style: none;
}

.page-faq .qa-sum::marker {
  content: none;
}

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

.page-faq .qa-num {
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--c-copper);
  flex: none;
  transition: color .15s ease;
}

.page-faq .qa-num::after {
  content: "";
  display: block;
  width: 0;
  height: 2px;
  margin-top: .35rem;
  background: var(--c-lime);
  transition: width .22s ease;
}

.page-faq .qa-q {
  font-size: clamp(1rem, .94rem + .4vw, 1.2rem);
  font-weight: 500;
  line-height: 1.5;
  color: var(--c-fog);
  transition: color .15s ease;
}

.page-faq .qa-mark {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 14px;
  height: 1px;
  background: var(--c-index);
  transition: transform .18s ease, background .18s ease;
}

.page-faq .qa-mark::after {
  transform: rotate(90deg);
}

.page-faq .qa-sum:hover .qa-num,
.page-faq .qa-sum:hover .qa-q {
  color: var(--c-lime);
}

.page-faq .qa[open] .qa-num {
  color: var(--c-lime);
}

.page-faq .qa[open] .qa-num::after {
  width: 100%;
}

.page-faq .qa[open] .qa-mark::before,
.page-faq .qa[open] .qa-mark::after {
  background: var(--c-lime);
}

.page-faq .qa[open] .qa-mark::after {
  transform: rotate(0deg);
}

/* 展开内容 */
.page-faq .qa-body {
  display: grid;
  gap: 1.25rem;
  padding: 0 0 clamp(1.5rem, 3.2vw, 2.25rem);
  padding-left: clamp(0rem, 4vw, 2.75rem);
}

.page-faq .qa-answer p {
  margin: 0 0 .85rem;
  max-width: 40em;
  line-height: 1.8;
  color: var(--c-fog);
  opacity: .88;
}

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

.page-faq .qa-answer a {
  color: var(--c-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 242, 74, .45);
}

.page-faq .qa-answer a:hover {
  border-bottom-color: var(--c-lime);
}

.page-faq .qa-note {
  font-family: var(--font-mono);
  font-size: .8125rem;
  line-height: 1.85;
  letter-spacing: .02em;
  color: var(--c-index);
  border-left: 2px solid rgba(181, 96, 58, .7);
  padding: .1rem 0 .1rem 1rem;
  align-self: start;
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(2rem, 5vw, 3rem);
}

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

/* ---------- 页尾出口 ---------- */
.page-faq .faq-exit {
  padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(3rem, 7vw, 5.5rem);
  border-top: 1px solid var(--line);
}

.page-faq .exit-grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}

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

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

.page-faq .exit-copy .eyebrow {
  margin-bottom: .85rem;
}

.page-faq .exit-copy h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: var(--step-2);
  line-height: 1.2;
  letter-spacing: .03em;
  color: var(--c-fog);
}

.page-faq .exit-copy p {
  margin: 0 0 1.5rem;
  max-width: 34em;
  line-height: 1.8;
  color: var(--c-index);
}

.page-faq .exit-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .qa-body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 1.25rem clamp(1.5rem, 3vw, 2.75rem);
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-faq .idx-cols {
    grid-template-columns: 7fr 5fr;
  }

  .page-faq .idx-col--offset {
    padding-top: 2.5rem;
  }

  .page-faq .exit-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  }
}

@media (max-width: 879px) {
  .page-faq .faq-hero-side {
    border-left: 0;
    border-top: 1px solid var(--line-soft);
    padding-left: 0;
    padding-top: 1.25rem;
  }
}

@media (max-width: 559px) {
  .page-faq .qa-sum {
    grid-template-columns: auto minmax(0, 1fr);
    row-gap: .5rem;
  }

  .page-faq .qa-mark {
    display: none;
  }

  .page-faq .qa-body {
    padding-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-num,
  .page-faq .qa-num::after,
  .page-faq .qa-q,
  .page-faq .qa-mark::before,
  .page-faq .qa-mark::after,
  .page-faq .idx-item a {
    transition: none;
  }
}