.page-faq {
  --faq-gap: clamp(24px, 4vw, 56px);
  --faq-side: 280px;
  --faq-indent: 40px;
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 48%, var(--ink) 100%);
  color: var(--text);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq .breadcrumb {
  padding-top: clamp(18px, 3vw, 32px);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  padding: clamp(28px, 5vw, 64px) 0 clamp(28px, 4vw, 52px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  max-width: 21ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, 68px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-hero__lead {
  margin: clamp(18px, 2.6vw, 30px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: var(--text);
}

/* ============ 主栅格 ============ */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(30px, 4.5vw, 60px);
}

/* ============ 左侧分类索引 ============ */
.page-faq .faq-side__media {
  margin: 0 0 22px;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-side__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
}

.page-faq .faq-side__label {
  margin: 0 0 10px;
  color: var(--muted);
}

.page-faq .faq-index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-index__item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 8px 12px 0;
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  transition: color var(--ease), background-color var(--ease), padding-left var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan);
  background-color: rgba(41, 242, 214, 0.06);
  padding-left: 8px;
}

.page-faq .faq-index__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--muted);
}

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

.page-faq .faq-side__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

/* ============ 分组 ============ */
.page-faq .faq-stream {
  min-width: 0;
}

.page-faq .faq-group {
  padding-top: clamp(34px, 5vw, 66px);
  scroll-margin-top: 130px;
}

.page-faq .faq-group:first-child {
  padding-top: 0;
}

.page-faq .faq-group__band {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 22px);
  border-top: 2px solid var(--red);
  padding-top: 16px;
}

.page-faq .faq-group__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--red);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.3vw, 28px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group__body {
  margin-top: 20px;
}

/* ============ 折叠问答 ============ */
.page-faq .faq-group {
  counter-reset: faqq;
}

.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 17px 44px 17px 0;
  list-style: none;
  cursor: pointer;
  font-size: clamp(15.5px, 1.5vw, 17.5px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
  transition: color var(--ease);
}

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

.page-faq .faq-q:hover {
  color: var(--white);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-item[open] > .faq-q {
  color: var(--white);
}

.page-faq .faq-q__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--muted);
  transition: color var(--ease);
}

.page-faq .faq-q__idx::before {
  counter-increment: faqq;
  content: "Q" counter(faqq, decimal-leading-zero);
}

.page-faq .faq-item[open] .faq-q__idx {
  color: var(--cyan);
}

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

.page-faq .faq-q__sign {
  position: absolute;
  right: 6px;
  top: calc(17px + 0.8em);
  width: 16px;
  height: 16px;
  transform: translateY(-50%);
  pointer-events: none;
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--muted);
  transition: transform var(--ease), background-color var(--ease);
}

.page-faq .faq-q__sign::before {
  width: 16px;
  height: 2px;
}

.page-faq .faq-q__sign::after {
  width: 2px;
  height: 16px;
}

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

.page-faq .faq-item[open] .faq-q__sign::after {
  transform: scaleY(0);
}

.page-faq .faq-a {
  padding: 0 44px 22px var(--faq-indent);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-a > p {
  margin: 0 0 12px;
}

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

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 242, 214, 0.4);
  transition: border-color var(--ease);
}

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

.page-faq .faq-steps {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  counter-reset: faqstep;
}

.page-faq .faq-steps > li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 38px;
  margin-top: 12px;
  line-height: 1.8;
}

.page-faq .faq-steps > li::before {
  content: counter(faqstep);
  position: absolute;
  left: 0;
  top: -2px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--red);
}

/* ============ 客户端分组配图 ============ */
.page-faq .faq-figure {
  margin: 26px 0 0;
}

.page-faq .faq-figure .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--line);
  filter: saturate(0.9) contrast(1.05);
}

.page-faq .faq-figure .media__caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ============ 底部未解决窄带 ============ */
.page-faq .faq-help {
  margin-top: clamp(48px, 7vw, 96px);
  padding-top: clamp(24px, 3.4vw, 40px);
  border-top: 3px solid var(--red);
}

.page-faq .faq-help__head {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 22px);
}

.page-faq .faq-help__mark {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--red);
}

.page-faq .faq-help__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 32px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(20px, 3vw, 36px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-help__col {
  background: var(--ink-3);
  padding: 18px 20px 20px;
}

.page-faq .faq-help__eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
}

.page-faq .faq-help__value {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.4vw, 16px);
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-help__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-help__foot {
  margin-top: clamp(20px, 3vw, 30px);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-help__foot > p {
  margin: 0 0 10px;
  max-width: 74ch;
}

.page-faq .faq-help__foot a {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 122, 26, 0.42);
  transition: border-color var(--ease);
}

.page-faq .faq-help__foot a:hover,
.page-faq .faq-help__foot a:focus-visible {
  border-bottom-color: var(--orange);
}

.page-faq .faq-help__hint {
  color: var(--muted);
}

/* ============ 响应式 ============ */
@media (min-width: 620px) {
  .page-faq .faq-help__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(220px, var(--faq-side)) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 78px);
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 128px;
    align-self: start;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-group--app .faq-group__body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: clamp(24px, 3vw, 44px);
    align-items: start;
  }

  .page-faq .faq-group--app .faq-figure {
    margin-top: 0;
  }
}

@media (max-width: 639px) {
  .page-faq .faq-a {
    padding-left: 0;
    padding-right: 12px;
  }

  .page-faq .faq-q {
    padding-right: 34px;
  }

  .page-faq .faq-q__sign {
    right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q,
  .page-faq .faq-q__sign::before,
  .page-faq .faq-q__sign::after,
  .page-faq .faq-index__link,
  .page-faq .faq-help__foot a,
  .page-faq .faq-a a {
    transition: none;
  }
}
<<<END>>>