.page-faq {
  --faq-rail-w: 264px;
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-top: clamp(20px, 3vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(36px, 6vw, 88px) 0 clamp(40px, 6vw, 84px);
  background:
    radial-gradient(120% 90% at 88% -12%, rgba(59, 240, 228, .14), transparent 62%),
    radial-gradient(90% 70% at 0% 110%, rgba(255, 122, 47, .09), transparent 60%),
    linear-gradient(180deg, #070B1F 0%, #0C1233 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(59, 240, 228, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 240, 228, .06) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 88%);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 24px;
}

.page-faq .faq-hero h1 {
  margin: .16em 0 .5em;
}

.page-faq .faq-hero__lede {
  max-width: 58ch;
  margin: 0;
  color: var(--mist-soft);
  font-size: clamp(1rem, .95rem + .35vw, 1.13rem);
  line-height: 1.82;
}

.page-faq .faq-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-faq .faq-hero__note {
  display: none;
  margin: 0;
  color: var(--mist);
  letter-spacing: .34em;
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .faq-hero__note {
    display: block;
  }
}

/* ---------- 三步路线 ---------- */
.page-faq .faq-route__inner {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: center;
}

.page-faq .faq-route__title {
  margin: .2em 0 .5em;
  font-size: clamp(1.6rem, 1.3rem + 1.6vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--warm);
}

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

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid rgba(59, 240, 228, .22);
}

.page-faq .faq-step:last-child {
  border-bottom: 1px solid rgba(59, 240, 228, .22);
}

.page-faq .faq-step__num {
  font-size: 1.45rem;
  line-height: 1;
  padding-top: .12em;
  color: var(--cyan);
}

.page-faq .faq-step h3 {
  margin: 0 0 .35em;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--warm);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--mist-soft);
}

.page-faq .faq-route__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(59, 240, 228, .26);
  background: rgba(7, 11, 31, .45);
}

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

.page-faq .faq-route__caption {
  padding: 12px 16px;
  font-size: .8rem;
  line-height: 1.65;
  letter-spacing: .03em;
  color: var(--mist-soft);
  border-top: 1px solid rgba(59, 240, 228, .18);
}

@media (min-width: 1000px) {
  .page-faq .faq-route__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: clamp(32px, 5vw, 72px);
  }
}

@media (max-width: 520px) {
  .page-faq .faq-step {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
  }

  .page-faq .faq-step__num {
    font-size: 1.2rem;
  }
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-flow {
  padding-top: clamp(48px, 6vw, 88px);
  padding-bottom: clamp(48px, 6vw, 88px);
}

.page-faq .faq-flow__inner {
  display: grid;
  gap: clamp(28px, 4vw, 40px);
}

@media (min-width: 1000px) {
  .page-faq .faq-flow__inner {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
  }
}

/* 左栏 */
.page-faq .faq-rail {
  display: grid;
  gap: 8px;
}

.page-faq .faq-rail__label {
  margin: 0;
  color: var(--cyan);
}

.page-faq .faq-rail__label + .faq-rail__route,
.page-faq .faq-rail__label + .faq-rail__list {
  margin-top: 4px;
}

.page-faq .faq-rail__route {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-rail__route li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 8px;
  font-size: .88rem;
  line-height: 1.5;
  color: var(--mist-soft);
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-rail__route .mono-num {
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail__list .index-list__item a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  font-size: .9rem;
  line-height: 1.5;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: background-color .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .faq-rail__list .index-list__num {
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--mist);
  transition: color .24s var(--ease);
}

.page-faq .faq-rail__list .index-list__item a:hover,
.page-faq .faq-rail__list .index-list__item a.is-current,
.page-faq .faq-rail__list .index-list__item.is-current a {
  background: rgba(59, 240, 228, .09);
  color: var(--warm);
  border-left-color: var(--cyan);
}

.page-faq .faq-rail__list .index-list__item a:hover .index-list__num,
.page-faq .faq-rail__list .index-list__item a.is-current .index-list__num {
  color: var(--cyan);
}

/* 问答流 */
.page-faq .faq-stream {
  display: grid;
  gap: clamp(36px, 4vw, 56px);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
}

.page-faq .faq-group__title {
  margin: 0 0 16px;
  padding-left: 14px;
  font-size: clamp(1.22rem, 1.08rem + .7vw, 1.55rem);
  font-weight: 800;
  line-height: 1.28;
  color: var(--warm);
  border-left: 3px solid var(--orange);
}

.page-faq .faq-item {
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--card-indigo);
  overflow: hidden;
  transition: border-color .24s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 8px;
}

.page-faq .faq-item[open] {
  border-color: rgba(59, 240, 228, .4);
}

.page-faq .faq-item > .accordion__summary {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 15px 18px;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.58;
  color: var(--mist-soft);
  cursor: pointer;
  transition: color .24s var(--ease), background-color .24s var(--ease);
}

.page-faq .faq-item > .accordion__summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > .accordion__summary::marker {
  content: "";
}

.page-faq .faq-item > .accordion__summary::before {
  content: "";
  flex: 0 0 auto;
  width: 3px;
  height: 1.1em;
  margin-top: .3em;
  border-radius: 2px;
  background: var(--line-strong);
  transition: background-color .24s var(--ease);
}

.page-faq .faq-item > .accordion__summary:hover {
  color: var(--warm);
  background: rgba(59, 240, 228, .05);
}

.page-faq .faq-item[open] > .accordion__summary {
  color: var(--warm);
  background: rgba(59, 240, 228, .06);
}

.page-faq .faq-item[open] > .accordion__summary::before {
  background: var(--cyan);
}

.page-faq .faq-item > .accordion__body {
  padding: 2px 18px 18px 31px;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-item > .accordion__body p {
  margin: 0 0 .8em;
}

.page-faq .faq-item > .accordion__body p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-inline-link {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: var(--cyan-line);
  text-underline-offset: 3px;
}

.page-faq .faq-inline-link:hover {
  text-decoration-color: var(--cyan);
}

/* 版本标签 */
.page-faq .faq-tags {
  list-style: none;
  margin: .4em 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-tags .pill {
  font-size: .8rem;
  letter-spacing: .02em;
}

/* 导出格式对照 */
.page-faq .faq-compare {
  display: grid;
  gap: 12px;
  margin: 16px 0 0;
}

.page-faq .faq-compare__card {
  padding: 14px 16px 16px;
  border-radius: var(--radius-md);
  background: rgba(7, 11, 31, .6);
  border: 1px solid rgba(59, 240, 228, .28);
}

.page-faq .faq-compare__card--alt {
  border-color: rgba(255, 122, 47, .34);
}

.page-faq .faq-compare__card h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  font-size: .95rem;
  font-weight: 700;
  color: var(--warm);
}

.page-faq .faq-compare__card h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-faq .faq-compare__card--alt h3::before {
  background: var(--orange);
}

.page-faq .faq-compare__spec {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.95;
  color: var(--mist-soft);
}

@media (min-width: 560px) {
  .page-faq .faq-compare {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 答案内插图 */
.page-faq .faq-figure {
  margin: 16px 0 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: rgba(7, 11, 31, .6);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  font-size: .78rem;
  line-height: 1.6;
  letter-spacing: .03em;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

/* ---------- 尾段 ---------- */
.page-faq .faq-next__inner {
  display: grid;
  gap: 20px;
}

.page-faq .faq-next__title {
  margin: .2em 0 0;
  font-size: clamp(1.45rem, 1.2rem + 1.2vw, 2.1rem);
  font-weight: 800;
  line-height: 1.22;
  color: var(--warm);
}

.page-faq .faq-next__links {
  display: grid;
  gap: 12px;
}

.page-faq .faq-next__links .link-arrow {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: .95rem;
  line-height: 1.6;
}

.page-faq .faq-next__links .link-arrow:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

@media (min-width: 900px) {
  .page-faq .faq-next__inner {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }
}