.page-faq {
  --faq-rail-w: 216px;
  --faq-gap: clamp(28px, 4vw, 56px);
  background: var(--char);
  color: var(--bone);
}

/* 面包屑 */
.page-faq .breadcrumb {
  padding-block: 18px 0;
}
.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--stone);
}
.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-2);
}
.page-faq .breadcrumb a {
  color: var(--bone-60);
  text-decoration: none;
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--cyan);
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--bone);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(28px, 5vw, 56px) clamp(40px, 6vw, 76px);
  background-color: var(--ink);
  background-image:
    radial-gradient(760px 360px at 84% -14%, var(--cyan-14), transparent 70%),
    radial-gradient(560px 300px at 4% 4%, var(--orange-12), transparent 66%),
    linear-gradient(180deg, rgba(11, 31, 26, 0) 40%, rgba(17, 20, 23, .9) 100%);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--clay), var(--orange) 42%, var(--cyan) 100%);
  opacity: .7;
}
.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  align-items: end;
}
.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(38px, 7.4vw, 78px);
  line-height: .98;
  letter-spacing: -.012em;
  color: var(--bone);
}
.page-faq .faq-hero__intro {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--bone-60);
}
.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: 26px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-faq .faq-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--stone);
}
.page-faq .faq-hero__stats .num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  color: var(--orange);
  letter-spacing: -.02em;
}
.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--line-2);
  background: var(--deep);
}
.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

/* 主体布局 */
.page-faq .faq-body {
  padding-block: clamp(36px, 5vw, 72px) clamp(48px, 7vw, 96px);
  background:
    linear-gradient(180deg, var(--char), var(--ink) 78%);
}
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

/* 左侧索引 */
.page-faq .faq-rail {
  min-width: 0;
  padding: 18px 16px;
  border: 1px solid var(--line);
  background: rgba(22, 48, 43, .42);
}
.page-faq .faq-rail__eyebrow {
  margin: 0 0 14px;
  font-size: var(--fs-12);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--stone);
}
.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .faq-rail__list li {
  flex: 0 0 auto;
}
.page-faq .faq-rail__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px 9px 10px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--bone-60);
  border: 1px solid var(--line);
  background: rgba(11, 31, 26, .55);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.page-faq .faq-rail__no {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--stone);
}
.page-faq .faq-rail__name {
  font-size: var(--fs-14);
  font-weight: 500;
}
.page-faq .faq-rail__count {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 1px 5px;
  color: var(--ink);
  background: var(--stone);
}
.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--bone);
  border-color: var(--orange);
  background: rgba(255, 106, 26, .1);
}
.page-faq .faq-rail__list a:hover .faq-rail__no,
.page-faq .faq-rail__list a:hover .faq-rail__count,
.page-faq .faq-rail__list a:focus-visible .faq-rail__no,
.page-faq .faq-rail__list a:focus-visible .faq-rail__count {
  color: var(--orange);
  background: transparent;
}
.page-faq .faq-rail__note {
  display: none;
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--stone);
}

/* 右侧问题流 */
.page-faq .faq-stream {
  min-width: 0;
}
.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 76px);
}
.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  column-gap: 12px;
  row-gap: 12px;
  padding-top: 20px;
  margin-bottom: 10px;
  border-top: 1px solid var(--line-2);
}
.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.2;
  letter-spacing: -.005em;
  color: var(--bone);
}
.page-faq .faq-group__desc {
  grid-column: 1 / -1;
  margin: 0;
  max-width: 52ch;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--bone-60);
}
.page-faq .faq-group__list {
  border-bottom: 1px solid var(--line);
}

/* 手风琴 */
.page-faq .faq-item {
  border-top: 1px solid var(--line);
}
.page-faq .faq-item:first-child {
  border-top: none;
}
.page-faq .faq-item summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 34px 16px 0;
  cursor: pointer;
  list-style: none;
  color: var(--bone);
  transition: color .2s var(--ease);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--stone);
  transition: color .2s var(--ease);
}
.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  color: var(--orange);
}
.page-faq .faq-item summary:hover::after,
.page-faq .faq-item summary:focus-visible::after {
  color: var(--orange);
}
.page-faq .faq-item summary:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 4px;
}
.page-faq .faq-item__no {
  flex: 0 0 30px;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--stone);
}
.page-faq .faq-item__q {
  font-size: var(--fs-16);
  font-weight: 500;
  line-height: 1.6;
}
.page-faq .faq-item__a {
  padding: 0 16px 20px 42px;
  max-width: 62ch;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--bone-60);
  border-left: 1px solid transparent;
}
.page-faq .faq-item__a p {
  margin: 0;
}
.page-faq .faq-item[open] > summary {
  color: var(--cyan);
}
.page-faq .faq-item[open] > summary::after {
  content: "–";
  color: var(--cyan);
}
.page-faq .faq-item[open] > summary .faq-item__no {
  color: var(--cyan);
}

/* 浏览器配图 */
.page-faq .faq-figure {
  margin: 18px 0 22px;
  border: 1px solid var(--line);
  background: var(--deep);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: .03em;
  color: var(--stone);
  border-top: 1px solid var(--line);
}

/* 三步路径 */
.page-faq .faq-path-wrap {
  margin: 22px 0 26px;
  padding: 20px 18px 10px;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(47, 74, 58, .35), rgba(11, 31, 26, .6));
}
.page-faq .faq-path__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--alert);
}
.page-faq .faq-path {
  display: block;
  width: 100%;
  height: auto;
  color: var(--stone);
}
.page-faq .faq-path text {
  font-family: var(--font-mono);
  font-size: 15px;
  fill: var(--bone-60);
}
.page-faq .faq-path text:nth-of-type(2n) {
  fill: var(--bone);
}

/* 收尾 */
.page-faq .faq-cta {
  padding-block: clamp(40px, 6vw, 80px);
  background: var(--ink);
  border-top: 1px solid var(--line);
}
.page-faq .faq-cta__inner {
  display: grid;
  gap: 24px;
  align-items: center;
}
.page-faq .faq-cta__copy h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(26px, 4.6vw, 44px);
  line-height: 1.1;
  color: var(--bone);
}
.page-faq .faq-cta__copy p {
  margin: 14px 0 0;
  max-width: 48ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--bone-60);
}
.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 720px) {
  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 36px;
  }
  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
  .page-faq .faq-group__head {
    column-gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
  }
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    padding: 20px 18px;
  }
  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow-x: visible;
  }
  .page-faq .faq-rail__list a {
    width: 100%;
    padding: 10px 12px;
    border-color: transparent;
    border-left: 2px solid var(--line-2);
    background: transparent;
  }
  .page-faq .faq-rail__name {
    flex: 1 1 auto;
  }
  .page-faq .faq-rail__count {
    color: var(--stone);
    background: transparent;
    padding: 0;
  }
  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    border-left-color: var(--orange);
    background: rgba(255, 106, 26, .08);
  }
  .page-faq .faq-rail__note {
    display: block;
  }
  .page-faq .faq-item summary {
    padding: 20px 40px 20px 0;
  }
  .page-faq .faq-item__q {
    font-size: var(--fs-20);
    font-weight: 400;
  }
  .page-faq .faq-item__a {
    padding: 0 24px 24px 42px;
    font-size: var(--fs-16);
  }
  .page-faq .faq-figure {
    margin: 26px 0 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item summary,
  .page-faq .faq-item summary::after,
  .page-faq .faq-rail__list a {
    transition: none;
  }
}
</output>