.page-faq {
  --faq-top: clamp(1.75rem, 4vw, 3rem);
  --faq-gap: clamp(1.75rem, 4vw, 3rem);
  background: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.75rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(120% 90% at 84% 6%, rgba(56, 242, 200, .16), transparent 58%),
    var(--ink);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: clamp(3.5rem, 8vw, 7rem);
  background: var(--ink-2);
  clip-path: polygon(0 100%, 100% 24%, 100% 100%);
  opacity: .6;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--faq-gap);
  align-items: center;
}

.page-faq .faq-hero__copy {
  display: grid;
  gap: clamp(.7rem, 1.6vw, 1.1rem);
  min-width: 0;
}

.page-faq .faq-hero .breadcrumbs {
  font-size: .8rem;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.95rem, 5.2vw, 3.35rem);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--on-dark);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(.95rem, 1.6vw, 1.05rem);
  line-height: 1.8;
  color: var(--sage-2);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem clamp(1rem, 3vw, 2.25rem);
  margin: .35rem 0 0;
  padding: clamp(.9rem, 2vw, 1.15rem) 0 0;
  list-style: none;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: .4rem;
  min-width: 0;
}

.page-faq .faq-hero__num {
  font-family: var(--font-num);
  font-size: clamp(1.1rem, 2.4vw, 1.45rem);
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__cap {
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--sage-2);
}

.page-faq .faq-hero__media {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
}

.page-faq .faq-hero__caption {
  margin: .7rem 0 0;
  font-family: var(--font-num);
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--sage);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  background: var(--paper);
  color: var(--on-paper);
  padding: clamp(2rem, 5vw, 3.75rem) 0 clamp(3rem, 6vw, 5rem);
}

.page-faq .faq-body__inner {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: start;
}

.page-faq .faq-index {
  display: grid;
  gap: .65rem;
  min-width: 0;
}

.page-faq .faq-index__title {
  margin: 0;
  font-family: var(--font-num);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--sage);
}

.page-faq .faq-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: .5rem;
  padding: .45rem .85rem;
  border: 1px solid var(--line-light);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--on-paper);
  font-size: .86rem;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease);
}

.page-faq .faq-index__link span {
  font-family: var(--font-num);
  font-size: .72rem;
  color: var(--sage);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--ink-2);
  background: var(--ink-2);
  color: var(--on-dark);
}

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

.page-faq .faq-index__note {
  margin: 0;
  max-width: 26ch;
  font-size: .78rem;
  line-height: 1.65;
  color: var(--sage);
}

.page-faq .faq-groups {
  display: grid;
  gap: var(--faq-gap);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: 5.5rem;
}

.page-faq .faq-group__head {
  display: grid;
  gap: .32rem;
  padding-bottom: .85rem;
  border-bottom: 2px solid var(--ink-2);
  transition: box-shadow .2s var(--ease);
}

.page-faq .faq-group:target .faq-group__head {
  box-shadow: 0 2px 0 0 var(--cyan);
}

.page-faq .faq-group__num {
  font-family: var(--font-num);
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--sage);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.28rem, 3vw, 1.7rem);
  line-height: 1.3;
  letter-spacing: .01em;
  color: var(--on-paper);
}

.page-faq .faq-group__intro {
  margin: 0;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--sage);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line-light);
}

.page-faq .faq-item summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .95rem .25rem .95rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(.98rem, 1.7vw, 1.08rem);
  line-height: 1.5;
  color: var(--on-paper);
  transition: color .18s var(--ease);
}

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

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

.page-faq .faq-item summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: .95rem;
  bottom: .95rem;
  width: 3px;
  border-radius: var(--r-pill);
  background: var(--paper-2);
  transition: background-color .2s var(--ease);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  padding-left: .5rem;
  font-family: var(--font-num);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--sage);
  transition: color .2s var(--ease);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  color: var(--ink-2);
}

.page-faq .faq-item summary:hover {
  color: var(--ink-2);
}

.page-faq .faq-item__body {
  max-width: 64ch;
  padding: 0 1rem 1.3rem 1rem;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--on-paper);
}

.page-faq .faq-item__body p {
  margin: 0 0 .7rem;
}

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

.page-faq .faq-item__body a {
  color: var(--ink-2);
  text-decoration: underline;
  text-decoration-color: var(--sage);
  text-underline-offset: .18em;
}

.page-faq .faq-item__body a:hover {
  text-decoration-color: var(--ink-2);
}

.page-faq .steps {
  counter-reset: fstep;
  display: grid;
  gap: .55rem;
  margin: 0 0 .85rem;
  padding: 0;
  list-style: none;
}

.page-faq .steps li {
  display: grid;
  grid-template-columns: 1.7rem minmax(0, 1fr);
  gap: .65rem;
  align-items: start;
  font-size: .93rem;
  line-height: 1.7;
}

.page-faq .steps li::before {
  counter-increment: fstep;
  content: counter(fstep, decimal-leading-zero);
  display: grid;
  place-items: center;
  height: 1.7rem;
  border-radius: var(--r-pill);
  background: var(--paper-2);
  font-family: var(--font-num);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--ink-2);
}

.page-faq .faq-kbd {
  font-family: var(--font-num);
  font-size: .85em;
  padding: .08rem .38rem;
  border: 1px solid var(--line-light);
  border-radius: 6px;
  background: var(--paper-2);
}

/* ---------- 中段提示带 ---------- */
.page-faq .faq-interlude {
  position: relative;
  display: grid;
  gap: .55rem;
  padding: clamp(1rem, 2.5vw, 1.5rem) clamp(1.1rem, 2.5vw, 1.75rem);
  border-radius: var(--r-md);
  background: linear-gradient(100deg, var(--ink-2) 0%, var(--ink) 80%);
  color: var(--on-dark);
  overflow: hidden;
}

.page-faq .faq-interlude::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 44%;
  height: 100%;
  background: repeating-linear-gradient(90deg, rgba(56, 242, 200, .2) 0 1px, transparent 1px 14px);
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-interlude__label {
  position: relative;
  margin: 0;
  font-family: var(--font-num);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-interlude__text {
  position: relative;
  margin: 0;
  max-width: 52ch;
  font-size: .93rem;
  line-height: 1.75;
  color: var(--on-dark);
}

.page-faq .faq-interlude__link {
  position: relative;
  justify-self: start;
  padding-bottom: .1rem;
  border-bottom: 1px solid currentColor;
  color: var(--cyan);
  font-size: .85rem;
  text-decoration: none;
}

.page-faq .faq-fig {
  font-family: var(--font-num);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
}

/* ---------- 图文错位 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: clamp(1rem, 2.5vw, 1.75rem);
}

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

.page-faq .faq-split__media {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-split__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--r-md);
}

.page-faq .faq-split__media figcaption {
  margin: .55rem 0 0;
  font-family: var(--font-num);
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--sage);
}

/* ---------- 收口 ---------- */
.page-faq .faq-signoff {
  position: relative;
  display: grid;
  gap: .7rem;
  margin-top: clamp(.25rem, 2vw, 1rem);
  padding: clamp(1.4rem, 3.5vw, 2.25rem);
  border-radius: var(--r-lg);
  background: var(--ink);
  color: var(--on-dark);
  overflow: hidden;
  scroll-margin-top: 5.5rem;
}

.page-faq .faq-signoff::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -62%;
  width: 62%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 242, 200, .22), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-signoff__label {
  position: relative;
  margin: 0;
  font-family: var(--font-num);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-signoff__title {
  position: relative;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.22rem, 3vw, 1.65rem);
  line-height: 1.32;
  color: var(--on-dark);
}

.page-faq .faq-signoff__text {
  position: relative;
  margin: 0;
  max-width: 54ch;
  font-size: .93rem;
  line-height: 1.8;
  color: var(--sage-2);
}

.page-faq .faq-signoff__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: .35rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 232px);
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__inner {
    grid-template-columns: 218px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 1.5rem;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: .01ms !important;
  }
}
<<<END>>>