.page-faq {
  background: var(--yb-cream);
  color: var(--yb-graphite);
  font-family: var(--yb-font);
  -webkit-font-smoothing: antialiased;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: calc(-1 * var(--yb-header-h));
  padding-top: calc(var(--yb-header-h) + 48px);
  padding-bottom: 48px;
  background: var(--yb-ink);
  color: var(--yb-cream);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, var(--yb-line-light-soft) 1px, transparent 1px),
    linear-gradient(180deg, var(--yb-line-light-soft) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.page-faq .faq-hero .yb-shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .yb-crumbs {
  margin-bottom: 26px;
  color: rgba(247, 244, 236, 0.66);
}

.page-faq .faq-hero .yb-crumbs a {
  color: rgba(247, 244, 236, 0.66);
  text-decoration: none;
}

.page-faq .faq-hero .yb-crumbs a:hover,
.page-faq .faq-hero .yb-crumbs a:focus-visible {
  color: var(--yb-gold);
}

.page-faq .faq-hero .yb-crumbs__current {
  color: var(--yb-cream);
}

.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--yb-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--yb-gold);
}

.page-faq .faq-hero__kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--yb-gold);
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 15em;
  font-size: clamp(28px, 4.6vw, 46px);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--yb-cream);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(247, 244, 236, 0.8);
}

/* 四组索引 */
.page-faq .faq-index {
  margin-top: 36px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--yb-line-light);
  border: 1px solid var(--yb-line-light);
}

.page-faq .faq-index__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  background: var(--yb-ink);
  color: var(--yb-cream);
  text-decoration: none;
  transition: background 180ms var(--yb-ease);
}

.page-faq .faq-index__card:hover {
  background: var(--yb-green-mid);
}

.page-faq .faq-index__card:focus-visible {
  outline: 2px solid var(--yb-coral);
  outline-offset: -2px;
}

.page-faq .faq-index__no {
  font-family: var(--yb-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--yb-gold);
}

.page-faq .faq-index__name {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.page-faq .faq-index__desc {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(247, 244, 236, 0.64);
}

/* ---------- 面板 ---------- */
.page-faq .faq-section {
  padding: 52px 0;
  border-top: 1px solid var(--yb-line);
}

.page-faq .faq-section--cream {
  background: var(--yb-cream);
}

.page-faq .faq-section--mist {
  background: var(--yb-mist);
}

/* ---------- 章节头 ---------- */
.page-faq .faq-head {
  display: grid;
  gap: 10px;
  margin-bottom: 30px;
}

.page-faq .faq-num {
  font-family: var(--yb-mono);
  font-size: clamp(38px, 5vw, 62px);
  line-height: 0.9;
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--yb-gold);
}

.page-faq .faq-head__title {
  margin: 0;
  font-size: clamp(21px, 2.6vw, 27px);
  line-height: 1.36;
  font-weight: 800;
  color: var(--yb-ink);
}

.page-faq .faq-head__note {
  margin: 0;
  padding-left: 14px;
  border-left: 1px solid var(--yb-line-strong);
  font-size: 14px;
  line-height: 1.8;
  color: var(--yb-fog);
}

.page-faq .faq-head--ink .faq-head__title {
  color: var(--yb-cream);
}

.page-faq .faq-head--ink .faq-head__note {
  border-left-color: var(--yb-line-light);
  color: rgba(247, 244, 236, 0.66);
}

/* ---------- 问题手风琴 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--yb-line-strong);
}

.page-faq .faq-item {
  padding-left: 16px;
  border-bottom: 1px solid var(--yb-line);
  box-shadow: inset 2px 0 0 transparent;
  transition: box-shadow 200ms var(--yb-ease);
}

.page-faq .faq-item[open] {
  box-shadow: inset 2px 0 0 var(--yb-gold);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 17px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--yb-coral);
  outline-offset: 3px;
}

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  padding-top: 4px;
  font-family: var(--yb-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--yb-gold);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  font-size: 15.5px;
  line-height: 1.65;
  font-weight: 600;
  color: var(--yb-ink);
}

.page-faq .faq-item__sign {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border: 1px solid var(--yb-line-strong);
  font-family: var(--yb-mono);
  font-size: 14px;
  line-height: 1;
  color: var(--yb-fog);
  transition: background 180ms var(--yb-ease), border-color 180ms var(--yb-ease), color 180ms var(--yb-ease);
}

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

.page-faq .faq-item[open] .faq-item__sign {
  background: var(--yb-gold);
  border-color: var(--yb-gold);
  color: var(--yb-cream);
}

.page-faq .faq-item[open] .faq-item__sign::before {
  content: "\2212";
}

.page-faq .faq-item__body {
  padding: 0 0 20px;
}

/* ---------- 步骤列表 ---------- */
.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  counter-reset: faqstep;
}

.page-faq .faq-steps > li {
  position: relative;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  column-gap: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--yb-graphite);
}

.page-faq .faq-steps > li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--yb-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--yb-cyan);
  padding-top: 3px;
}

.page-faq .faq-steps a {
  color: var(--yb-ink);
  text-decoration: underline;
  text-decoration-color: var(--yb-coral);
  text-underline-offset: 3px;
}

.page-faq .faq-steps a:hover,
.page-faq .faq-steps a:focus-visible {
  color: var(--yb-coral);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 30px;
  border: 1px solid var(--yb-line-strong);
  background: var(--yb-cream);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--yb-line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--yb-fog);
}

/* ---------- 工具卡 ---------- */
.page-faq .faq-tools {
  display: grid;
  gap: 16px;
}

.page-faq .faq-tool {
  padding: 20px;
  background: var(--yb-cream);
  border: 1px solid var(--yb-line-strong);
}

.page-faq .faq-tool__tag {
  margin: 0 0 6px;
  font-family: var(--yb-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--yb-gold);
}

.page-faq .faq-tool__name {
  margin: 0 0 14px;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 800;
  color: var(--yb-ink);
}

.page-faq .faq-pitfall {
  margin: 16px 0 0;
  padding: 10px 12px;
  background: var(--yb-gold-light);
  border-left: 2px solid var(--yb-coral);
  font-size: 13px;
  line-height: 1.7;
  color: var(--yb-graphite);
}

/* ---------- 图 + 问题分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 24px;
}

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

/* ---------- 联系 ---------- */
.page-faq .faq-contact {
  padding: 52px 0 60px;
  background: var(--yb-ink);
  color: var(--yb-cream);
  border-top: 1px solid var(--yb-line-light);
}

.page-faq .faq-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--yb-line-light);
  border: 1px solid var(--yb-line-light);
}

.page-faq .faq-contact__cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background: var(--yb-ink);
}

.page-faq .faq-contact__key {
  font-family: var(--yb-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--yb-gold);
}

.page-faq .faq-contact__val {
  font-family: var(--yb-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--yb-cream);
  word-break: break-word;
}

.page-faq .faq-contact .yb-copy {
  padding: 0;
  background: none;
  border: 0;
  font-family: var(--yb-mono);
  font-size: 15px;
  line-height: 1.6;
  text-align: left;
  color: var(--yb-cream);
  cursor: pointer;
  text-decoration: underline;
  text-decoration-color: var(--yb-coral);
  text-underline-offset: 4px;
  word-break: break-all;
}

.page-faq .faq-contact .yb-copy:hover,
.page-faq .faq-contact .yb-copy:focus-visible {
  color: var(--yb-gold);
}

.page-faq .faq-contact .yb-copy:focus-visible {
  outline: 2px solid var(--yb-coral);
  outline-offset: 3px;
}

.page-faq .faq-contact__body {
  margin-top: 30px;
}

.page-faq .faq-contact__sub {
  margin: 0 0 14px;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 800;
  color: var(--yb-cream);
}

.page-faq .faq-steps--ink > li {
  color: rgba(247, 244, 236, 0.82);
}

.page-faq .faq-steps--ink > li::before {
  color: var(--yb-cyan);
}

.page-faq .faq-contact__text {
  margin: 22px 0 0;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(247, 244, 236, 0.72);
}

.page-faq .faq-contact__text a {
  color: var(--yb-cream);
  text-decoration: underline;
  text-decoration-color: var(--yb-coral);
  text-underline-offset: 3px;
}

.page-faq .faq-contact__text a:hover,
.page-faq .faq-contact__text a:focus-visible {
  color: var(--yb-gold);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

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

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

@media (min-width: 820px) {
  .page-faq .faq-tools {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: calc(var(--yb-header-h) + 68px);
    padding-bottom: 64px;
  }

  .page-faq .faq-section {
    padding: 76px 0;
  }

  .page-faq .faq-contact {
    padding: 76px 0 84px;
  }

  .page-faq .faq-head {
    grid-template-columns: 104px minmax(0, 1fr) minmax(0, 300px);
    column-gap: 32px;
    align-items: start;
    margin-bottom: 36px;
  }

  .page-faq .faq-head__note {
    padding-top: 6px;
  }

  .page-faq .faq-item__q {
    font-size: 17px;
  }

  .page-faq .faq-figure {
    margin-bottom: 34px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-item[open] {
    display: grid;
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.35fr);
    column-gap: 40px;
    align-items: start;
  }

  .page-faq .faq-item[open] > summary {
    grid-column: 1;
    grid-row: 1;
    padding-bottom: 22px;
  }

  .page-faq .faq-item[open] .faq-item__body {
    grid-column: 2;
    grid-row: 1;
    padding-top: 19px;
    padding-bottom: 22px;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    column-gap: 40px;
    align-items: start;
  }

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

@media (min-width: 1100px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__card,
  .page-faq .faq-item,
  .page-faq .faq-item__sign {
    transition: none;
  }
}
<<<END>>>