.page-faq {
  --faq-hair: rgba(10, 26, 43, .14);
  --faq-hair-ink: rgba(195, 208, 218, .26);
  --faq-dash: rgba(10, 26, 43, .18);
  background: var(--paper-050);
  color: var(--ink-900);
}

.page-faq .mono {
  letter-spacing: .08em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  background: var(--ink-900);
  color: var(--paper-100);
  padding: 0 0 52px;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -80px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(228, 87, 31, .18), rgba(228, 87, 31, 0) 68%);
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumb {
  padding: 22px 0 0;
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumb__link {
  color: var(--gray-200);
}

.page-faq .faq-hero .breadcrumb__link:hover,
.page-faq .faq-hero .breadcrumb__link[aria-current="page"] {
  color: var(--orange-300);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 32px;
  padding-top: 28px;
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__lead .eyebrow {
  color: var(--orange-300);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(40px, 8vw, 76px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--paper-050);
  margin: 14px 0 20px;
  max-width: 15ch;
}

.page-faq .faq-hero .lede {
  color: var(--gray-200);
  max-width: 46ch;
  margin: 0;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--faq-hair-ink);
  border: 1px solid var(--faq-hair-ink);
}

.page-faq .faq-stat {
  background: var(--ink-900);
  padding: 16px 18px;
}

.page-faq .faq-stat dt {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--gray-500);
  margin-bottom: 8px;
}

.page-faq .faq-stat dd {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: var(--fs-32);
  line-height: 1;
  color: var(--paper-100);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-center {
  background: var(--paper-050);
  padding: 48px 0 64px;
}

.page-faq .faq-layout {
  display: grid;
  gap: 32px;
}

.page-faq .faq-side__title {
  font-size: var(--fs-12);
  letter-spacing: .16em;
  color: var(--gray-500);
  border-bottom: 1px solid var(--faq-hair);
  padding-bottom: 10px;
  margin: 0 0 12px;
}

.page-faq .faq-side__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.page-faq .faq-side__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0;
  text-decoration: none;
  color: var(--ink-900);
  font-size: var(--fs-14);
  border-bottom: 1px dashed var(--faq-dash);
  transition: color .12s var(--ease);
}

.page-faq .faq-side__link:hover {
  color: var(--orange-500);
}

.page-faq .faq-side__code {
  flex: none;
  color: var(--orange-500);
  font-size: var(--fs-12);
}

.page-faq .faq-side__name {
  flex: 1;
  position: relative;
}

.page-faq .faq-side__name::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 1px;
  background: var(--orange-500);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .16s var(--ease);
}

.page-faq .faq-side__link:hover .faq-side__name::after {
  transform: scaleX(1);
}

.page-faq .faq-side__num {
  flex: none;
  color: var(--gray-500);
  font-size: var(--fs-12);
}

.page-faq .faq-side__note {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--gray-500);
  border-left: 2px solid var(--orange-300);
  padding-left: 12px;
  margin: 0 0 18px;
}

.page-faq .faq-side__btn {
  display: inline-block;
}

.page-faq .faq-articles__title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ink-900);
  margin: 0 0 8px;
}

.page-faq .faq-articles__sub {
  font-size: var(--fs-14);
  color: var(--gray-500);
  margin: 0 0 24px;
}

.page-faq .faq-figure {
  margin: 0 0 40px;
}

.page-faq .faq-cat {
  scroll-margin-top: calc(var(--header-h) + 24px);
  margin-bottom: 44px;
}

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

.page-faq .faq-cat__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 6px 0 10px;
  border-top: 2px solid var(--ink-900);
  margin-bottom: 4px;
}

.page-faq .faq-cat__code {
  color: var(--orange-500);
  font-size: var(--fs-12);
  flex: none;
}

.page-faq .faq-cat__title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: var(--fs-22);
  letter-spacing: -.01em;
  margin: 0;
  color: var(--ink-900);
}

.page-faq .faq-cat__count {
  margin-left: auto;
  font-size: var(--fs-12);
  color: var(--gray-500);
  flex: none;
}

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

.page-faq .faq-item[open] {
  background: linear-gradient(to right, var(--paper-100), rgba(241, 227, 195, .12));
  box-shadow: inset 3px 0 0 var(--orange-500);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 4px;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-17);
  line-height: 1.55;
  color: var(--ink-900);
  transition: color .12s var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--orange-500);
}

.page-faq .faq-item__mark {
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border: 1px solid var(--gray-200);
  position: relative;
  transition: border-color .12s var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--orange-500);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--orange-500);
  transition: transform .18s var(--ease), opacity .18s var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 5px;
  right: 5px;
  top: 50%;
  height: 2px;
  margin-top: -1px;
}

.page-faq .faq-item__mark::after {
  top: 5px;
  bottom: 5px;
  left: 50%;
  width: 2px;
  margin-left: -1px;
}

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

.page-faq .faq-item__a {
  margin: 0;
  padding: 2px 8px 18px 34px;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--ink-800);
  max-width: 60ch;
}

/* ---------- 订阅服务范围 ---------- */
.page-faq .faq-subscribe {
  background: var(--ink-900);
  color: var(--paper-100);
  padding: 56px 0 60px;
}

.page-faq .sub-head {
  max-width: 60ch;
  margin-bottom: 36px;
}

.page-faq .sub-head .eyebrow {
  color: var(--orange-300);
}

.page-faq .sub-head__title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(26px, 4.4vw, 44px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--paper-050);
  margin: 14px 0 14px;
}

.page-faq .sub-head__lede {
  color: var(--gray-200);
  margin: 0;
}

.page-faq .sub-grid {
  display: grid;
  gap: 32px;
}

.page-faq .sub-figure {
  margin: 0;
}

.page-faq .sub-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--faq-hair-ink);
  border: 1px solid var(--faq-hair-ink);
}

.page-faq .sub-item {
  background: var(--ink-900);
  padding: 16px 18px;
  transition: background .12s var(--ease);
}

.page-faq .sub-item:hover {
  background: var(--glass-strong);
}

.page-faq .sub-item__top {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}

.page-faq .sub-item__code {
  color: var(--orange-500);
  font-size: var(--fs-12);
}

.page-faq .sub-item__name {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: var(--fs-17);
  margin: 0;
  color: var(--paper-050);
}

.page-faq .sub-item__when {
  margin-left: auto;
  font-size: var(--fs-12);
  color: var(--gray-500);
}

.page-faq .sub-item__fit {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--gray-200);
  max-width: 52ch;
}

/* ---------- 接收频率 ---------- */
.page-faq .faq-grain {
  background: var(--ink-800);
  color: var(--paper-100);
  padding: 52px 0 56px;
}

.page-faq .grain-head {
  max-width: 58ch;
  margin-bottom: 28px;
}

.page-faq .grain-head .eyebrow {
  color: var(--orange-300);
}

.page-faq .grain-head__title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--paper-050);
  margin: 14px 0 12px;
}

.page-faq .grain-head__lede {
  color: var(--gray-200);
  margin: 0;
}

.page-faq .grain__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  position: relative;
  margin-bottom: 20px;
}

.page-faq .grain__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
  pointer-events: none;
}

.page-faq .grain__tab {
  display: block;
  padding: 10px 18px;
  font-size: var(--fs-14);
  color: var(--gray-200);
  border: 1px solid var(--faq-hair-ink);
  background: var(--glass);
  cursor: pointer;
  transition: background .12s var(--ease), color .12s var(--ease), border-color .12s var(--ease);
}

.page-faq .grain__tab:hover {
  border-color: var(--orange-300);
  color: var(--paper-050);
}

.page-faq #grain-week:checked + .grain__tab,
.page-faq #grain-nav:checked + .grain__tab,
.page-faq #grain-file:checked + .grain__tab {
  background: var(--orange-500);
  border-color: var(--orange-500);
  color: var(--paper-050);
}

.page-faq #grain-week:focus-visible + .grain__tab,
.page-faq #grain-nav:focus-visible + .grain__tab,
.page-faq #grain-file:focus-visible + .grain__tab {
  outline: 2px solid var(--orange-300);
  outline-offset: 2px;
}

.page-faq .grain__panel {
  display: none;
  border-left: 3px solid var(--orange-500);
  background: var(--glass);
  padding: 20px 22px;
}

.page-faq #grain-week:checked ~ .grain__panels .grain__panel {
  display: none;
}

.page-faq #grain-week:checked ~ .grain__panels .grain__panel--week {
  display: block;
}

.page-faq #grain-nav:checked ~ .grain__panels .grain__panel {
  display: none;
}

.page-faq #grain-nav:checked ~ .grain__panels .grain__panel--nav {
  display: block;
}

.page-faq #grain-file:checked ~ .grain__panels .grain__panel {
  display: none;
}

.page-faq #grain-file:checked ~ .grain__panels .grain__panel--file {
  display: block;
}

.page-faq .grain__lead {
  margin: 0 0 14px;
  font-size: var(--fs-17);
  line-height: 1.6;
  color: var(--paper-050);
  max-width: 48ch;
}

.page-faq .grain__facts {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .grain__facts li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 8px 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--gray-200);
  border-top: 1px dashed var(--faq-hair-ink);
}

.page-faq .grain__key {
  flex: none;
  width: 3.4em;
  color: var(--orange-300);
  font-size: var(--fs-12);
}

/* ---------- 旧栏目对照 ---------- */
.page-faq .faq-legacy {
  background: var(--paper-050);
  padding: 56px 0 60px;
}

.page-faq .faq-legacy__grid {
  display: grid;
  gap: 32px;
}

.page-faq .faq-legacy__intro .eyebrow {
  color: var(--orange-500);
}

.page-faq .faq-legacy__title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ink-900);
  margin: 14px 0 16px;
}

.page-faq .faq-legacy__intro p {
  color: var(--ink-800);
  max-width: 46ch;
  margin: 0 0 16px;
}

.page-faq .faq-legacy__links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.page-faq .faq-inline-link {
  color: var(--orange-500);
  font-size: var(--fs-14);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  transition: color .12s var(--ease);
}

.page-faq .faq-inline-link:hover {
  color: var(--ink-900);
}

.page-faq .faq-legacy__panel {
  background: var(--paper-100);
  padding: 22px 22px 20px;
  border-top: 2px solid var(--ink-900);
}

.page-faq .faq-legacy__panel-title {
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: var(--gray-500);
  margin: 0 0 14px;
}

.page-faq .faq-ver {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-ver__row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: baseline;
  padding: 11px 0;
  border-top: 1px dashed var(--faq-dash);
}

.page-faq .faq-ver__key {
  flex: none;
  width: 4.6em;
  font-size: var(--fs-12);
  color: var(--orange-500);
}

.page-faq .faq-ver__txt {
  flex: 1 1 220px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--ink-800);
}

.page-faq .faq-legacy__foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 2px solid var(--ink-900);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--gray-500);
}

/* ---------- 反馈引导 ---------- */
.page-faq .faq-cta {
  background: var(--paper-100);
  padding: 48px 0 56px;
}

.page-faq .faq-cta__box {
  display: grid;
  gap: 22px;
  border-left: 4px solid var(--orange-500);
  background: var(--paper-050);
  padding: 26px 24px;
}

.page-faq .faq-cta__text .eyebrow {
  color: var(--orange-500);
}

.page-faq .faq-cta__title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--ink-900);
  margin: 12px 0 10px;
}

.page-faq .faq-cta__text p {
  margin: 0;
  color: var(--ink-800);
  max-width: 54ch;
}

.page-faq .faq-cta__btn {
  justify-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-cta__box {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 32px 30px;
  }

  .page-faq .faq-cta__btn {
    justify-self: end;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-bottom: 64px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
  }

  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .sub-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-legacy__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-center {
    padding: 64px 0 80px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (max-width: 719px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-stat {
    padding: 14px 14px;
  }

  .page-faq .faq-stat dd {
    font-size: var(--fs-22);
  }

  .page-faq .faq-item__a {
    padding: 2px 4px 16px 34px;
    font-size: 16px;
    line-height: 1.7;
  }

  .page-faq .sub-item__when {
    margin-left: 0;
    width: 100%;
  }

  .page-faq .grain__tab {
    flex: 1 1 100%;
    text-align: center;
  }

  .page-faq .grain__facts li {
    flex-wrap: wrap;
    gap: 2px 10px;
  }
}
<<<END>>>