.page-faq {
  --faq-index-w: 216px;
  --faq-gap: clamp(20px, 3.2vw, 40px);
  --faq-line: 2px solid var(--dk-ink);
  --faq-focus: 3px solid var(--dk-lime);
  display: block;
  background: var(--dk-paper);
  color: var(--dk-ink);
  font-family: var(--dk-font-body);
}

/* 面包屑 */
.page-faq .faq-crumb {
  padding-top: clamp(14px, 2.2vw, 24px);
  padding-bottom: 2px;
}
.page-faq .faq-crumb .dk-breadcrumb {
  font-family: var(--dk-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--dk-slate);
}
.page-faq .faq-crumb .dk-breadcrumb a {
  color: var(--dk-teal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dk-ease), color var(--dk-ease);
}
.page-faq .faq-crumb .dk-breadcrumb a:hover,
.page-faq .faq-crumb .dk-breadcrumb a:focus-visible {
  color: var(--dk-orange);
  border-bottom-color: var(--dk-orange);
}

/* 首屏 */
.page-faq .faq-hero {
  background: var(--dk-snow);
  border-bottom: var(--faq-line);
  padding: clamp(24px, 4vw, 44px) 0 clamp(30px, 4.6vw, 56px);
}
.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}
.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-family: var(--dk-font-display);
  font-size: clamp(32px, 6.2vw, 58px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--dk-ink);
  max-width: 15em;
}
.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: var(--dk-ink);
}
.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 2.6vw, 28px);
}
.page-faq .faq-hero__actions .dk-btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

/* 一分钟上手面板 */
.page-faq .faq-steps {
  background: var(--dk-ink);
  color: var(--dk-paper);
  border-left: 6px solid var(--dk-orange);
  padding: clamp(18px, 2.6vw, 26px);
}
.page-faq .faq-steps__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dk-lime);
}
.page-faq .faq-steps__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.page-faq .faq-steps__item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding-top: 16px;
  border-top: 1px solid rgba(247, 245, 239, 0.22);
}
.page-faq .faq-steps__item:first-child {
  padding-top: 0;
  border-top: 0;
}
.page-faq .faq-steps__num {
  flex: 0 0 auto;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--dk-ink);
  background: var(--dk-lime);
  padding: 3px 7px;
  line-height: 1.4;
}
.page-faq .faq-steps__body {
  min-width: 0;
}
.page-faq .faq-steps__name {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--dk-paper);
}
.page-faq .faq-steps__desc {
  margin: 4px 0 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(247, 245, 239, 0.76);
}

/* 主体：索引 + 问答 */
.page-faq .faq-main {
  padding: clamp(28px, 4.4vw, 60px) 0 clamp(40px, 6vw, 84px);
}
.page-faq .faq-main__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

/* 分类索引 */
.page-faq .faq-index {
  border-top: var(--faq-line);
  padding-top: 10px;
}
.page-faq .faq-index__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dk-sand-deep);
}
.page-faq .faq-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.page-faq .faq-index__item {
  flex: 0 0 auto;
}
.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 11px;
  min-height: 44px;
  box-sizing: border-box;
  text-decoration: none;
  white-space: nowrap;
  font-size: 14px;
  line-height: 1.3;
  color: var(--dk-ink);
  background: transparent;
  border-left: 3px solid transparent;
  transition: background var(--dk-ease), border-color var(--dk-ease), color var(--dk-ease);
}
.page-faq .faq-index__link:hover {
  background: var(--dk-sand);
  border-left-color: var(--dk-orange);
}
.page-faq .faq-index__link:focus-visible {
  outline: var(--faq-focus);
  outline-offset: 2px;
  background: var(--dk-sand);
}
.page-faq .faq-index__num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--dk-sand-deep);
}
.page-faq .faq-index__note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--dk-slate);
}

/* 问答堆叠 */
.page-faq .faq-stack {
  display: flex;
  flex-direction: column;
  gap: clamp(24px, 3.4vw, 40px);
  min-width: 0;
}
.page-faq .faq-group {
  border: var(--faq-line);
  background: var(--dk-paper);
  box-shadow: var(--dk-shadow);
  scroll-margin-top: calc(var(--dk-topbar-h) + 24px);
  min-width: 0;
}
.page-faq .faq-group__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 12px;
  padding: 12px clamp(14px, 2vw, 20px);
  background: var(--dk-snow);
  border-bottom: var(--faq-line);
}
.page-faq .faq-group__num {
  font-family: var(--dk-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1;
  padding: 5px 8px;
  background: var(--dk-ink);
  color: var(--dk-paper);
}
.page-faq .faq-group__title {
  flex: 1 1 12em;
  margin: 0;
  font-family: var(--dk-font-display);
  font-size: clamp(19px, 2.6vw, 25px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--dk-ink);
}
.page-faq .faq-group__tag {
  flex: 0 0 auto;
  font-family: var(--dk-font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--dk-teal);
  border: 2px solid var(--dk-teal);
  padding: 2px 7px;
  line-height: 1.4;
}
.page-faq .faq-group__items {
  padding: 2px clamp(14px, 2vw, 22px) clamp(14px, 2vw, 20px);
}
.page-faq .faq-group__intro {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--dk-ink);
  max-width: 40em;
}

/* 折叠问答 */
.page-faq .faq-q {
  border-top: 1px solid var(--dk-sand);
}
.page-faq .faq-q:first-of-type {
  border-top: 0;
}
.page-faq .faq-q__sum {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 15px 0;
  min-height: 44px;
  box-sizing: border-box;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--dk-ink);
  transition: color var(--dk-ease);
}
.page-faq .faq-q__sum::-webkit-details-marker {
  display: none;
}
.page-faq .faq-q__sum::marker {
  content: "";
}
.page-faq .faq-q__sum::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--dk-font-mono);
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  color: var(--dk-orange);
}
.page-faq .faq-q__sum:hover {
  color: var(--dk-teal);
}
.page-faq .faq-q__sum:focus-visible {
  outline: var(--faq-focus);
  outline-offset: -3px;
}
.page-faq .faq-q[open] > .faq-q__sum::after {
  content: "−";
  color: var(--dk-ink);
}
.page-faq .faq-q__marker {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--dk-sand-deep);
}
.page-faq .faq-q__text {
  min-width: 0;
}
.page-faq .faq-q__body {
  padding: 0 0 16px 0;
  border-left: 3px solid var(--dk-snow);
  padding-left: clamp(10px, 1.6vw, 14px);
  margin-left: 1px;
}
.page-faq .faq-q__body p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--dk-ink);
  max-width: 42em;
}
.page-faq .faq-q__body p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-q__body ul,
.page-faq .faq-q__body ol {
  margin: 0 0 10px;
  padding-left: 1.25em;
  font-size: 14.5px;
  line-height: 1.8;
}
.page-faq .faq-inline-link {
  color: var(--dk-teal);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid var(--dk-orange);
  transition: color var(--dk-ease), background var(--dk-ease);
}
.page-faq .faq-inline-link:hover {
  color: var(--dk-orange);
  background: var(--dk-snow);
}
.page-faq .faq-inline-link:focus-visible {
  outline: var(--faq-focus);
  outline-offset: 2px;
}

/* 六项清单 */
.page-faq .faq-checklist {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}
.page-faq .faq-checklist__item {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  padding: 11px 13px;
  background: var(--dk-snow);
  border-left: 4px solid var(--dk-teal);
}
.page-faq .faq-checklist__num {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.7;
  color: var(--dk-ink);
  background: var(--dk-lime);
  padding: 0 6px;
}
.page-faq .faq-checklist__name {
  margin: 0;
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--dk-ink);
}
.page-faq .faq-checklist__desc {
  margin: 3px 0 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--dk-ink);
}

/* 配图 */
.page-faq .faq-figure {
  margin: 20px 0 6px;
  border: var(--faq-line);
  background: var(--dk-ink);
  overflow: hidden;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-faq .faq-figure__cap {
  display: block;
  padding: 10px 14px;
  font-family: var(--dk-font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--dk-lime);
  background: var(--dk-ink);
}

/* 联系渠道 */
.page-faq .faq-channels {
  list-style: none;
  margin: 16px 0 4px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.page-faq .faq-channels__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  padding: 12px 14px;
  background: var(--dk-sand);
  border-left: 4px solid var(--dk-sand-deep);
}
.page-faq .faq-channels__label {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dk-sand-deep);
}
.page-faq .faq-channels__value {
  font-family: var(--dk-font-mono);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--dk-ink);
  overflow-wrap: anywhere;
}
.page-faq .faq-channels__note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--dk-ink);
}

/* 底部行动面板 */
.page-faq .faq-cta {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
  margin-top: 20px;
  padding: clamp(16px, 2.4vw, 22px);
  background: var(--dk-ink);
  border-left: 6px solid var(--dk-orange);
}
.page-faq .faq-cta__title {
  margin: 0;
  font-family: var(--dk-font-display);
  font-size: clamp(19px, 2.4vw, 23px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--dk-paper);
}
.page-faq .faq-cta__desc {
  margin: 5px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(247, 245, 239, 0.78);
}
.page-faq .faq-cta__btn {
  flex: 0 0 auto;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

/* 中等屏幕 */
@media (min-width: 620px) {
  .page-faq .faq-checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-figure__cap {
    padding: 11px 16px;
  }
  .page-faq .faq-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
  }
}

/* 桌面端：固定分类轨道 + 宽幅问答 */
@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 4vw, 60px);
  }
  .page-faq .faq-main__inner {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--dk-topbar-h) + 20px);
  }
  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    margin-top: 12px;
  }
  .page-faq .faq-index__item {
    flex: none;
    margin-bottom: 2px;
  }
  .page-faq .faq-index__link {
    white-space: normal;
    align-items: baseline;
  }
  .page-faq .faq-group__items {
    padding-top: 6px;
  }
  .page-faq .faq-q__sum {
    font-size: 16px;
  }
}

@media (min-width: 1120px) {
  .page-faq {
    --faq-index-w: 232px;
  }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-q__sum,
  .page-faq .faq-inline-link,
  .page-faq .faq-crumb .dk-breadcrumb a {
    transition: none;
  }
}
<<<END>>>