.page-faq {
  --faq-line: 1px solid var(--c-steel);
  --faq-line-soft: 1px solid rgba(42, 74, 80, 0.6);
  background: var(--c-ink);
  color: var(--c-fog);
}

.page-faq .faq-shell {
  width: 100%;
  max-width: var(--shell-w);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(24px, 4vw, 42px);
  padding-bottom: clamp(38px, 6vw, 78px);
  border-bottom: var(--faq-line);
  background:
    radial-gradient(115% 95% at 88% -10%, rgba(20, 80, 90, 0.95) 0%, rgba(11, 47, 54, 0) 62%),
    linear-gradient(158deg, var(--c-deep) 0%, var(--c-ink) 72%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(143, 179, 184, 0.06) 0 1px, transparent 1px 88px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 85%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 85%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  bottom: 8px;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 106, 42, 0.9) 38%, rgba(255, 106, 42, 0.15) 78%, transparent 100%);
  transform: rotate(-2.2deg);
  transform-origin: left center;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

.page-faq .breadcrumbs a {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .breadcrumbs a:hover {
  color: var(--c-track);
  border-bottom-color: var(--c-track);
}

.page-faq .breadcrumbs__sep {
  color: var(--c-steel);
}

.page-faq .eyebrow {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-track);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 16em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5.8vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--c-fog);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--c-mist);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-faq .faq-hero__meta span {
  padding: 6px 11px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--c-mist);
  background: rgba(6, 26, 31, 0.55);
  border: var(--faq-line);
}

/* ---------- 主栅格 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding-top: clamp(28px, 4.5vw, 56px);
  padding-bottom: clamp(48px, 7vw, 88px);
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 226px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 60px);
    align-items: start;
  }
}

/* ---------- 左侧目录 ---------- */
.page-faq .faq-side {
  border-top: 2px solid var(--c-track);
  padding-top: 16px;
}

.page-faq .faq-side__title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-mist);
}

.page-faq .faq-side__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-side__list a {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 6px;
  align-items: baseline;
  padding: 9px 10px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--c-mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-side__list a .mono {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-steel);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-side__list a:hover {
  color: var(--c-fog);
  background: rgba(20, 80, 90, 0.42);
}

.page-faq .faq-side__list a:hover .mono {
  color: var(--c-mist);
}

.page-faq .faq-side__list a[aria-current="true"] {
  color: var(--c-fog);
  border-left-color: var(--c-track);
  background: rgba(20, 80, 90, 0.58);
}

.page-faq .faq-side__list a[aria-current="true"] .mono {
  color: var(--c-track);
}

.page-faq .faq-side .aside-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-mist);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-main {
  display: grid;
  gap: clamp(22px, 3.4vw, 38px);
  min-width: 0;
}

.page-faq .faq-block {
  position: relative;
  padding: clamp(18px, 2.8vw, 30px);
  border: var(--faq-line);
  background: linear-gradient(178deg, rgba(11, 47, 54, 0.92) 0%, rgba(6, 26, 31, 0.88) 100%);
  scroll-margin-top: 96px;
}

.page-faq .faq-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background: var(--c-track);
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 12px;
  align-items: start;
  padding-bottom: 14px;
  border-bottom: var(--faq-line-soft);
}

.page-faq .faq-block__num {
  display: inline-block;
  padding: 4px 6px;
  font-size: 11px;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--c-track);
  border: 1px solid rgba(255, 106, 42, 0.42);
}

.page-faq .faq-block h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.4vw, 25px);
  line-height: 1.32;
  letter-spacing: -0.02em;
  color: var(--c-fog);
}

.page-faq .faq-block__intro {
  margin: 14px 0 2px;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--c-mist);
}

/* ---------- 可展开问答 ---------- */
.page-faq .faq-q {
  border-bottom: var(--faq-line-soft);
}

.page-faq .faq-q:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-q > summary {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 16px 0;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-fog);
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-q > summary::before {
  content: "+";
  box-sizing: border-box;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  color: var(--c-track);
  border: 1px solid rgba(255, 106, 42, 0.45);
  border-radius: 50%;
  transition: background-color 0.24s var(--ease), color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-faq .faq-q > summary:hover {
  color: var(--c-track);
}

.page-faq .faq-q[open] > summary::before {
  content: "−";
  background: var(--c-track);
  border-color: var(--c-track);
  color: var(--c-ink);
}

.page-faq .faq-a {
  margin: 0 0 18px 10px;
  padding: 2px 0 2px 18px;
  border-left: 2px solid var(--c-track);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-mist);
}

.page-faq .faq-a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-a a {
  color: var(--c-track);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 42, 0.45);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-a a:hover {
  color: var(--c-fog);
  border-bottom-color: var(--c-fog);
}

.page-faq .faq-steps {
  margin: 12px 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
  display: grid;
  gap: 7px;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 8px;
  font-size: 14px;
  line-height: 1.75;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.9;
  letter-spacing: 0.04em;
  color: var(--c-track);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 16px 0 12px;
  border: var(--faq-line);
  background: var(--c-ink);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 10px 12px;
  border-top: var(--faq-line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--c-mist);
}

/* ---------- 联系信息条 ---------- */
.page-faq .faq-contact {
  margin: 14px 0 4px;
  border: var(--faq-line);
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  padding: 11px 13px;
  border-bottom: var(--faq-line-soft);
}

.page-faq .faq-contact__row:last-child {
  border-bottom: 0;
}

.page-faq .faq-contact__k {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-mist);
}

.page-faq .faq-contact__v {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-fog);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__v a {
  color: var(--c-track);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 42, 0.45);
}

.page-faq .faq-contact__v a:hover {
  border-bottom-color: var(--c-track);
}

@media (min-width: 620px) {
  .page-faq .faq-contact__row {
    grid-template-columns: 78px minmax(0, 1fr);
    align-items: baseline;
    gap: 10px;
  }
}

/* ---------- 收束 ---------- */
.page-faq .faq-exit {
  display: grid;
  gap: 14px;
  padding: clamp(20px, 3vw, 30px);
  border: var(--faq-line);
  border-left: 3px solid var(--c-track);
  background:
    linear-gradient(120deg, rgba(20, 80, 90, 0.55) 0%, rgba(6, 26, 31, 0.9) 100%);
}

.page-faq .faq-exit h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.32;
  letter-spacing: -0.02em;
  color: var(--c-fog);
}

.page-faq .faq-exit p {
  margin: 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--c-mist);
}

.page-faq .faq-exit__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero::after,
  .page-faq .faq-q > summary::before,
  .page-faq .faq-side__list a,
  .page-faq .faq-side__list a .mono {
    transition: none;
  }
}
<<<END>>>