.page-faq {
  --faq-col-question: minmax(0, 5fr);
  --faq-col-answer: minmax(0, 7fr);
  --faq-inset: clamp(14px, 2vw, 26px);
  background: var(--ink-900);
  color: var(--cool);
}

.page-faq .section {
  padding-top: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(24px, 4vw, 48px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(20px, 3vw, 36px);
}

.page-faq .faq-hero__grid {
  align-items: start;
}

.page-faq .faq-hero__title {
  margin: 12px 0 18px;
  max-width: 16ch;
}

.page-faq .faq-hero__side {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
}

.page-faq .faq-hero__list {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px;
  width: 100%;
}

.page-faq .faq-hero__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .faq-hero__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 7px;
  height: 1px;
  background: var(--neon);
}

/* ---------- 横向索引带 ---------- */
.page-faq .faq-index {
  padding-top: clamp(18px, 3vw, 32px);
}

.page-faq .faq-index .eyebrow {
  margin-bottom: 14px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-index__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
  padding: 16px 14px;
  background: var(--ink-900);
  color: var(--cool);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-index__no {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--neon-deep);
}

.page-faq .faq-index__label {
  font-size: 14px;
  line-height: 1.45;
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  background: var(--ink-700);
  color: var(--white);
}

.page-faq .faq-index__item:hover .faq-index__no,
.page-faq .faq-index__item:focus-visible .faq-index__no {
  color: var(--neon);
}

/* ---------- 问答组 ---------- */
.page-faq .qa-section {
  padding-top: clamp(18px, 3vw, 30px);
  padding-bottom: clamp(18px, 3vw, 30px);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h-sm) + 16px);
}

.page-faq .qa-section:target {
  box-shadow: inset 3px 0 0 var(--neon);
  background: linear-gradient(90deg, rgba(59, 240, 200, 0.07), rgba(6, 35, 28, 0) 55%);
}

.page-faq .qa {
  border: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px var(--gap);
  align-items: center;
  padding: 6px 0;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .qa__summary::marker {
  content: "";
}

.page-faq .qa__head {
  display: flex;
  gap: 14px;
  align-items: baseline;
}

.page-faq .qa__ord {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--neon-deep);
}

.page-faq .qa__question {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 27px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-faq .qa__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.page-faq .qa__brief {
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-faq .qa__mark {
  flex: none;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--neon-deep);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--neon);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa__mark::before {
  content: "+";
}

.page-faq .qa[open] .qa__mark::before {
  content: "–";
}

.page-faq .qa[open] .qa__mark {
  border-color: var(--neon);
  background: var(--ink-700);
}

.page-faq .qa__summary:hover .qa__mark,
.page-faq .qa__summary:focus-visible .qa__mark {
  border-color: var(--neon);
}

.page-faq .qa__summary:focus-visible {
  outline: 1px solid var(--neon);
  outline-offset: 4px;
}

.page-faq .qa__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px var(--gap);
  margin-top: 16px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  animation: faq-reveal var(--dur) var(--ease) both;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .qa__aside {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.page-faq .qa__link {
  font-size: 13px;
  line-height: 1.5;
  color: var(--neon);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .qa__link:hover,
.page-faq .qa__link:focus-visible {
  border-bottom-color: var(--neon);
}

.page-faq .qa__answer {
  max-width: 68ch;
}

.page-faq .qa__answer p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cool);
}

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

.page-faq .qa__answer ul {
  margin: 14px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.page-faq .qa__answer li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .qa__answer li::marker {
  color: var(--neon-deep);
}

.page-faq .qa__figure {
  margin: 20px 0 0;
}

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

/* ---------- 权益对照 ---------- */
.page-faq .rights-table {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .rights-row {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px 18px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease);
}

.page-faq .rights-row__name {
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
}

.page-faq .rights-row__desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-faq .rights-row.is-changed {
  padding-left: 18px;
}

.page-faq .rights-row.is-changed::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--signal);
}

.page-faq .rights-row:hover,
.page-faq .rights-row:focus-within {
  background: var(--ink-800);
}

.page-faq .rights-row:hover .rights-row__desc {
  color: var(--cool);
}

/* ---------- 收尾联系 ---------- */
.page-faq .faq-help {
  border-top: 1px solid var(--line);
}

.page-faq .faq-help__lead .lede {
  margin-top: 4px;
}

.page-faq .faq-help__lead .btn {
  margin-top: 22px;
}

.page-faq .faq-help__channels {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-faq .faq-help__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  align-items: baseline;
  justify-content: space-between;
}

.page-faq .faq-help__key {
  font-size: 12px;
  letter-spacing: 0.06em;
  flex: none;
}

.page-faq .faq-help__val {
  font-size: 13px;
  color: var(--neon);
  word-break: break-all;
}

.page-faq .faq-help__note {
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 900px) {
  .page-faq .qa-section {
    scroll-margin-top: calc(var(--header-h) + 18px);
  }

  .page-faq .qa__summary,
  .page-faq .qa__body {
    grid-template-columns: var(--faq-col-question) var(--faq-col-answer);
  }

  .page-faq .qa__meta {
    padding-right: 4px;
  }

  .page-faq .faq-index__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .rights-row {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: baseline;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .page-faq .rights-row.is-changed {
    padding-left: 20px;
  }

  .page-faq .rights-row.is-changed::before {
    top: 20px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__title {
    max-width: 14ch;
  }
}
```