.page-faq {
  --faq-gutter: clamp(20px, 6vw, 96px);
  --faq-max: 1560px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--ff-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

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

/* ── 首屏 ─────────────────────────────── */
.page-faq .faq-mast {
  background:
    repeating-linear-gradient(90deg, rgba(143, 179, 167, 0.07) 0 1px, transparent 1px 96px),
    linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 82%);
  border-bottom: 1px solid var(--line-dark);
  padding-block: clamp(20px, 3.4vw, 40px) clamp(34px, 5vw, 70px);
}

.page-faq .breadcrumbs {
  margin-bottom: clamp(18px, 3vw, 36px);
  color: var(--mist);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-faq .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .breadcrumbs li + li::before {
  content: "/";
  margin-inline: 8px;
  color: var(--line-dark);
}

.page-faq .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

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

.page-faq .faq-mast__grid {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
}

.page-faq .faq-h1 {
  margin: 12px 0 18px;
  font-family: var(--ff-display);
  font-weight: 800;
  font-size: clamp(2rem, 5.4vw, 4.15rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-mast__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(16px, 2.6vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-mast__tags li {
  padding: 5px 10px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-faq .faq-mast__figure {
  margin: 0;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.38);
}

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

/* ── 主体：索引 + 问答 ─────────────────── */
.page-faq .faq-body {
  background: var(--ink);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(30px, 5vw, 66px) clamp(40px, 6vw, 88px);
}

.page-faq .faq-index {
  border-top: 1px solid var(--line-cyan);
  padding-top: 12px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  color: var(--paper);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-faq .faq-index__link .num {
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.08em;
}

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

/* ── 问答组 ───────────────────────────── */
.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-group {
  padding-block: clamp(22px, 3.2vw, 36px);
  border-top: 1px solid var(--line-dark);
  scroll-margin-top: 96px;
}

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

.page-faq .faq-group--paper {
  margin-block: clamp(20px, 3vw, 40px);
  padding: clamp(22px, 3.4vw, 42px);
  border-top: 0;
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--paper-ink);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.28);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  margin-bottom: 8px;
}

.page-faq .faq-group__no {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-faq .faq-group--paper .faq-group__no {
  color: var(--teal);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.5vw, 2.05rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-faq .faq-group__intro {
  margin: 0 0 clamp(10px, 2vw, 18px);
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-group--paper .faq-group__intro {
  color: rgba(18, 32, 28, 0.74);
}

/* 第一组：问答 + 示意图 */
.page-faq .faq-entry {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

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

.page-faq .faq-entry__figure {
  margin: 0;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: var(--ink-2);
  overflow: hidden;
}

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

.page-faq .faq-entry__figure figcaption {
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}

/* ── 折叠问答 ─────────────────────────── */
.page-faq .faq-q {
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-group--paper .faq-q {
  border-bottom-color: var(--line-paper);
}

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

.page-faq .faq-q__summary {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 0;
  font-size: 15.5px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  transition: color 200ms var(--ease);
}

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

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

.page-faq .faq-q__summary::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--cyan);
  transition: width 240ms var(--ease);
}

.page-faq .faq-q[open] .faq-q__summary::before {
  width: 100%;
}

.page-faq .faq-group--paper .faq-q__summary::before {
  background: var(--teal);
}

.page-faq .faq-q__summary:hover,
.page-faq .faq-q__summary:focus-visible {
  color: var(--cyan);
  outline: none;
}

.page-faq .faq-group--paper .faq-q__summary:hover,
.page-faq .faq-group--paper .faq-q__summary:focus-visible {
  color: var(--teal);
}

.page-faq .faq-q__mark {
  margin-left: auto;
  flex: none;
  font-family: var(--ff-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--cyan);
}

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

.page-faq .faq-q[open] .faq-q__mark::before {
  content: "–";
}

.page-faq .faq-group--paper .faq-q__mark {
  color: var(--teal);
}

.page-faq .faq-q__body {
  padding: 0 0 18px;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-group--paper .faq-q__body {
  color: rgba(18, 32, 28, 0.8);
}

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

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

.page-faq .faq-q[open] .faq-q__body {
  animation: faq-reveal 200ms var(--ease) both;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* 步骤与维度列表 */
.page-faq .faq-steps {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
}

.page-faq .faq-steps .num {
  color: var(--gold);
  font-size: 11.5px;
  letter-spacing: 0.08em;
}

.page-faq .faq-group--paper .faq-steps .num {
  color: var(--teal);
}

.page-faq .faq-dims {
  display: grid;
  gap: 8px 16px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-dims li {
  padding-left: 10px;
  border-left: 1px solid rgba(14, 107, 88, 0.45);
  font-size: 13.5px;
  line-height: 1.7;
}

/* 行内链接 */
.page-faq .faq-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

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

.page-faq .faq-group--paper .faq-link {
  color: var(--teal);
  border-bottom-color: rgba(14, 107, 88, 0.42);
}

.page-faq .faq-group--paper .faq-link:hover,
.page-faq .faq-group--paper .faq-link:focus-visible {
  color: var(--paper-ink);
  border-bottom-color: var(--paper-ink);
}

/* ── 联系方式 ─────────────────────────── */
.page-faq .faq-contact {
  display: grid;
  gap: 20px;
  margin-top: 18px;
}

.page-faq .faq-contact__item {
  padding-top: 12px;
  border-top: 1px solid var(--line-cyan);
}

.page-faq .faq-contact__label {
  margin: 0 0 6px;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-contact__value {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__value.num {
  font-family: var(--ff-mono);
  font-size: 15px;
  letter-spacing: 0.02em;
}

.page-faq .faq-contact__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-more__link {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  font-size: 14px;
  color: var(--mist);
}

/* ── 断点 ─────────────────────────────── */
@media (min-width: 640px) {
  .page-faq .faq-dims {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-mast__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: end;
  }

  .page-faq .faq-lead {
    font-size: 16.5px;
  }

  .page-faq .faq-entry {
    grid-template-columns: minmax(0, 1fr) 268px;
    align-items: start;
  }

  .page-faq .faq-entry__figure {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 214px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    position: relative;
    padding: 9px 0 9px 14px;
    border: 0;
    border-left: 1px solid var(--line-soft);
    border-radius: 0;
    white-space: normal;
    line-height: 1.5;
    font-size: 13.5px;
  }

  .page-faq .faq-index__link::before {
    content: "";
    position: absolute;
    left: -3px;
    top: 50%;
    width: 5px;
    height: 5px;
    transform: translateY(-50%);
    border-radius: 50%;
    background: var(--ink-3);
    transition: background-color 200ms var(--ease), box-shadow 200ms var(--ease);
  }

  .page-faq .faq-index__link:hover::before,
  .page-faq .faq-index__link:focus-visible::before {
    background: var(--cyan);
    box-shadow: 0 0 0 3px rgba(61, 242, 196, 0.16);
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: transparent;
    border-left-color: var(--line-cyan);
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q[open] .faq-q__body {
    animation: none;
  }

  .page-faq .faq-q__summary,
  .page-faq .faq-q__summary::before,
  .page-faq .faq-index__link,
  .page-faq .faq-index__link::before,
  .page-faq .faq-link,
  .page-faq .breadcrumbs a {
    transition: none;
  }
}
<<<END>>>