.page-faq {
  --faq-gap: clamp(1.25rem, 4vw, 3rem);
  --faq-cut: 18px;
  color: var(--paper);
  background: var(--ink-900);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-block: 1rem 0;
}
.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.page-faq .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--line);
}
.page-faq .breadcrumb__list a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-faq .breadcrumb__list a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-faq .breadcrumb__list [aria-current="page"] {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.75rem, 4vw, 2.75rem) clamp(2.25rem, 5vw, 3.75rem);
  background:
    radial-gradient(115% 85% at 8% 0%, rgba(31, 224, 206, 0.14), transparent 58%),
    radial-gradient(90% 70% at 96% 22%, rgba(255, 106, 31, 0.12), transparent 62%),
    var(--ink-900);
}
.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}
.page-faq .faq-hero__title {
  margin: 0.7rem 0 1rem;
  font-size: clamp(2.05rem, 7.2vw, 4.3rem);
  line-height: 0.98;
  letter-spacing: -0.022em;
}
.page-faq .faq-hero__lede {
  max-width: 42ch;
  color: var(--paper);
  opacity: 0.9;
}
.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: clamp(1.35rem, 3vw, 2rem);
}

.page-faq .faq-stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-faint);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}
.page-faq .faq-stats__item {
  background: var(--ink-800);
  padding: 0.95rem 1.05rem;
}
.page-faq .faq-stats dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}
.page-faq .faq-stats dd {
  margin: 0.4rem 0 0;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
.page-faq .faq-hero__aside-note {
  margin: 1rem 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--mist);
  border-left: 2px solid var(--orange);
  padding-left: 0.85rem;
}

/* ---------- 问题塔 ---------- */
.page-faq .faq-tower {
  padding-block: clamp(2rem, 5vw, 3.5rem);
  background: var(--ink-900);
}
.page-faq .faq-tower__media {
  margin: 0 0 clamp(1.75rem, 4vw, 2.75rem);
}
.page-faq .faq-tower__head {
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}
.page-faq .faq-tower__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}
.page-faq .faq-tower__item {
  min-width: 0;
}
.page-faq .faq-tower__link {
  position: relative;
  display: grid;
  gap: 0.4rem;
  height: 100%;
  padding: 1.15rem 1.2rem;
  color: var(--paper);
  text-decoration: none;
  background: var(--ink-800);
  border-top: 2px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-faq .faq-tower__link:hover,
.page-faq .faq-tower__link:focus-visible {
  background: var(--ink-700);
  border-top-color: var(--cyan);
  transform: translateY(-3px);
}
.page-faq .faq-tower__idx {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--orange);
  line-height: 1;
}
.page-faq .faq-tower__name {
  font-family: var(--font-display);
  font-size: 1.12rem;
  letter-spacing: -0.01em;
}
.page-faq .faq-tower__count {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.page-faq .faq-tower__desc {
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 问题组 ---------- */
.page-faq .faq-group {
  position: relative;
  padding-block: clamp(2.25rem, 5vw, 3.5rem);
  background: var(--ink-900);
}
.page-faq .faq-group::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--gutter);
  right: var(--gutter);
  height: 1px;
  background-image: repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 13px);
}
.page-faq .faq-group--split {
  background: var(--ink-800);
}
.page-faq .faq-group__head {
  max-width: 46rem;
  margin-bottom: clamp(1.35rem, 3vw, 2rem);
}
.page-faq .faq-group__intro {
  margin-top: 0.75rem;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--mist);
}
.page-faq .faq-group__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}
.page-faq .faq-group__media {
  margin: 0;
  aspect-ratio: 3 / 4;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  position: relative;
  margin-bottom: 0.6rem;
  background: var(--ink-800);
  box-shadow: inset 0 0 0 1px var(--line-soft);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-faq .faq-group--split .faq-item {
  background: var(--ink-700);
}
.page-faq .faq-item[open] {
  background: var(--ink-700);
  box-shadow: inset 0 0 0 1px var(--cyan);
}
.page-faq .faq-group--split .faq-item[open] {
  background: var(--ink-600);
}
.page-faq .faq-item__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.8rem;
  padding: 1rem 1.15rem;
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-item__sum::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}
.page-faq .faq-item__no {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--mist);
  white-space: nowrap;
}
.page-faq .faq-item[open] .faq-item__no {
  color: var(--orange);
}
.page-faq .faq-item__q {
  font-size: 1.01rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}
.page-faq .faq-item__chev {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}
.page-faq .faq-item__chev::before,
.page-faq .faq-item__chev::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.page-faq .faq-item__chev::before {
  top: 50%;
  left: 0;
  width: 14px;
  height: 2px;
  transform: translateY(-50%);
}
.page-faq .faq-item__chev::after {
  left: 50%;
  top: 0;
  width: 2px;
  height: 14px;
  transform: translateX(-50%);
}
.page-faq .faq-item[open] .faq-item__chev::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  padding: 0 1.15rem 1.35rem;
  animation: faq-panel-in 240ms var(--ease);
}
@keyframes faq-panel-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}
.page-faq .faq-item__answer p {
  margin: 0 0 0.75rem;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--paper);
  opacity: 0.92;
}
.page-faq .faq-item__answer p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-item__aside {
  padding-top: 0.85rem;
  border-top: 1px solid var(--line-faint);
}
.page-faq .faq-item__aside-title {
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--amber);
}
.page-faq .faq-item__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}
.page-faq .faq-item__links li {
  position: relative;
  padding-left: 0.9rem;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--mist);
}
.page-faq .faq-item__links li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.5rem;
  height: 1px;
  background: var(--orange);
}
.page-faq .faq-item__links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}
.page-faq .faq-item__links a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  background:
    radial-gradient(100% 80% at 90% 0%, rgba(255, 106, 31, 0.14), transparent 60%),
    var(--ink-800);
  padding-block: clamp(2.5rem, 6vw, 4rem);
}
.page-faq .faq-cta__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}
.page-faq .faq-cta__title {
  margin: 0.7rem 0 0.85rem;
  font-size: clamp(1.6rem, 4.4vw, 2.5rem);
  line-height: 1.06;
}
.page-faq .faq-cta__text {
  max-width: 46ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.9;
}
.page-faq .faq-cta__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}
.page-faq .faq-cta__text a:hover {
  border-bottom-color: var(--cyan);
}
.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}
.page-faq .faq-cta__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-faint);
  border: 1px solid var(--line-soft);
}
.page-faq .faq-cta__list li {
  display: grid;
  gap: 0.3rem;
  padding: 0.9rem 1rem;
  background: var(--ink-900);
}
.page-faq .faq-cta__key {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--amber);
}
.page-faq .faq-cta__val {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--paper);
}
.page-faq .faq-cta__side-note {
  margin: 1rem 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--mist);
}
.page-faq .faq-cta__side-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-faq .faq-cta__side-note a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 桌面断点 ---------- */
@media (min-width: 860px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.25rem);
  }
  .page-faq .faq-stats dd {
    font-size: 1.6rem;
  }

  .page-faq .faq-tower__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }
  .page-faq .faq-tower__item--1 .faq-tower__link { padding-block: 2.75rem 1.5rem; }
  .page-faq .faq-tower__item--2 .faq-tower__link { padding-block: 2.2rem 1.5rem; }
  .page-faq .faq-tower__item--3 .faq-tower__link { padding-block: 1.7rem 1.5rem; }
  .page-faq .faq-tower__item--4 .faq-tower__link { padding-block: 1.2rem 1.5rem; }

  .page-faq .faq-item__panel {
    grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr);
    gap: clamp(1.5rem, 3vw, 3rem);
    padding: 0.25rem 1.5rem 1.5rem 1.2rem;
  }
  .page-faq .faq-item__aside {
    padding-top: 0;
    border-top: 0;
    border-left: 1px solid var(--line-faint);
    padding-left: 1.35rem;
  }

  .page-faq .faq-group__grid {
    grid-template-columns: minmax(0, 1.75fr) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }
  .page-faq .faq-group__side {
    position: sticky;
    top: 5rem;
  }

  .page-faq .faq-cta__grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-hero__title {
    font-size: clamp(3.2rem, 5.6vw, 4.6rem);
  }
  .page-faq .faq-tower__name {
    font-size: 1.22rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__panel {
    animation: none;
  }
  .page-faq .faq-tower__link,
  .page-faq .faq-item,
  .page-faq .faq-item__chev::before,
  .page-faq .faq-item__chev::after {
    transition: none;
  }
  .page-faq .faq-tower__link:hover,
  .page-faq .faq-tower__link:focus-visible {
    transform: none;
  }
}
<<<END>>>