.page-faq {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-sans);
}

.page-faq .breadcrumb {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter) 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--gray);
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .breadcrumb a {
  color: var(--lake);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

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

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--stamp);
}

/* ---------- 首屏拼贴 ---------- */
.page-faq .faq-hero {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 24px var(--gutter) 44px;
  display: grid;
  gap: 30px;
}

.page-faq .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--red);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 12px 0 0;
  max-width: 13em;
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  font-size: clamp(15px, 1.7vw, 17.5px);
  line-height: 1.85;
  color: var(--gray);
  max-width: 34em;
}

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

.page-faq .faq-hero__stack {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-faq .hero-chip {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--white);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.page-faq .hero-chip--yellow {
  background: var(--yellow);
}

.page-faq .hero-chip--paper {
  background: var(--paper);
}

.page-faq .hero-chip--lake {
  border-color: var(--lake);
  box-shadow: 4px 4px 0 var(--lake);
}

.page-faq .hero-chip__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1;
  font-style: italic;
}

.page-faq .hero-chip__label {
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink);
}

/* ---------- 页内导读 ---------- */
.page-faq .faq-index {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter) 48px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-index a {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--ink);
  text-decoration: none;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 999px;
  padding: 8px 15px;
  transition: transform 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  transform: translateY(-2px);
  background: var(--ink);
  color: var(--cream);
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-block {
  padding: 52px 0;
}

.page-faq .faq-block--paper {
  background: var(--paper);
  border-top: 2.5px solid var(--ink);
  border-bottom: 2.5px solid var(--ink);
}

.page-faq .faq-block__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-faq .section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 30px;
}

.page-faq .section-no {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 6.6vw, 60px);
  line-height: 0.9;
  color: var(--red);
  font-style: italic;
}

.page-faq .section-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.8vw, 36px);
  line-height: 1.24;
  margin: 6px 0 0;
}

.page-faq .section-lede {
  margin: 12px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--gray);
  max-width: 42em;
}

/* ---------- 六步轨道 ---------- */
.page-faq .step-layout {
  display: grid;
  gap: 30px;
}

.page-faq .steps {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.page-faq .steps::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 2px;
  background: repeating-linear-gradient(to bottom, var(--ink) 0 9px, transparent 9px 18px);
}

.page-faq .step {
  position: relative;
  padding-left: 56px;
}

.page-faq .step + .step {
  margin-top: 14px;
}

.page-faq .step::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 20px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--cream);
  border: 3px solid var(--ink);
}

.page-faq .step__panel {
  background: var(--cream);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: box-shadow 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-faq .step__panel[open] {
  box-shadow: var(--shadow-hard);
}

.page-faq .step__panel summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 13px 15px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .step__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--cream);
  background: var(--ink);
  border-radius: 6px;
  padding: 3px 7px;
}

.page-faq .step__name {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17.5px;
  line-height: 1.35;
}

.page-faq .step__state {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  border-radius: 999px;
  border: 2px solid var(--stamp);
  color: var(--stamp);
}

.page-faq .step__panel[open] .step__state {
  border-color: var(--red);
  color: var(--red);
}

.page-faq .step__body {
  margin: 0 15px;
  padding: 13px 0 16px;
  border-top: 2px dashed rgba(26, 26, 26, 0.22);
}

.page-faq .step__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--gray);
}

.page-faq .step-aside {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.page-faq .step-aside .media {
  margin: 0;
  border: 2.5px solid var(--ink);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  box-shadow: var(--shadow-hard);
}

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

.page-faq .media__caption {
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--gray);
  background: var(--white);
  border-top: 2px dashed rgba(26, 26, 26, 0.2);
}

.page-faq .aside-note {
  margin: 0;
  background: var(--yellow);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-sm);
  padding: 15px 17px;
  font-size: 14px;
  line-height: 1.8;
  box-shadow: var(--shadow-soft);
}

/* ---------- 设备分段切换 ---------- */
.page-faq .dev-tabs {
  display: grid;
  gap: 20px;
}

.page-faq .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .tabs__tab {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 14.5px;
  padding: 10px 24px;
  border-radius: 999px;
  border: 2.5px solid var(--ink);
  background: var(--cream);
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.16s var(--ease), background 0.16s var(--ease), color 0.16s var(--ease);
}

.page-faq .tabs__tab:hover {
  transform: translateY(-2px);
}

.page-faq .tabs__tab[aria-selected="true"] {
  background: var(--lake);
  color: var(--white);
  box-shadow: var(--shadow-soft);
}

.page-faq .tabs__panel {
  background: var(--white);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius);
  padding: 22px 20px 24px;
  box-shadow: var(--shadow-hard);
}

.page-faq .tabs__panel h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 21px;
  line-height: 1.35;
  margin: 0 0 16px;
}

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

.page-faq .dev-list li {
  position: relative;
  padding-left: 28px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--gray);
}

.page-faq .dev-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--lake);
  font-weight: 900;
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .device-figure {
  margin: 28px 0 0;
  border: 2.5px solid var(--ink);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper);
  box-shadow: var(--shadow-hard);
}

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

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
}

.page-faq .qa {
  background: var(--white);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: box-shadow 0.18s var(--ease);
}

.page-faq .qa[open] {
  box-shadow: var(--shadow-hard);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-weight: 800;
  font-size: 15.5px;
  line-height: 1.6;
}

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

.page-faq .qa summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.2;
  color: var(--red);
}

.page-faq .qa[open] summary::after {
  content: "–";
}

.page-faq .qa__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--white);
  background: var(--lake);
  border-radius: 5px;
  padding: 2px 6px;
  line-height: 1.7;
}

.page-faq .qa__body {
  margin: 0 16px;
  padding: 13px 0 16px;
  border-top: 2px dashed rgba(26, 26, 26, 0.18);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--gray);
}

.page-faq .inline-link {
  color: var(--lake);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}

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

/* ---------- 联系我们之前 ---------- */
.page-faq .contact-card {
  background: var(--yellow);
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  padding: 24px 20px;
}

.page-faq .prep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .prep-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-faq .prep-list .num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  background: var(--ink);
  color: var(--cream);
  border-radius: 6px;
  padding: 2px 7px;
  line-height: 1.7;
}

.page-faq .contact-card__foot {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 2px dashed rgba(26, 26, 26, 0.3);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 下一步 ---------- */
.page-faq .faq-next {
  padding-bottom: 64px;
}

.page-faq .next-links {
  display: grid;
  gap: 14px;
}

.page-faq .next-link {
  display: grid;
  gap: 8px;
  text-decoration: none;
  color: var(--ink);
  background: var(--cream);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-sm);
  padding: 18px;
  box-shadow: var(--shadow-soft);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-faq .next-link:hover,
.page-faq .next-link:focus-visible {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-hard);
}

.page-faq .next-link__kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--red);
}

.page-faq .next-link__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.4;
}

.page-faq .next-link__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding-top: 32px;
    padding-bottom: 56px;
  }

  .page-faq .contact-card {
    padding: 30px 28px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: center;
    padding-top: 44px;
    padding-bottom: 68px;
  }

  .page-faq .faq-hero__stack {
    gap: 16px;
  }

  .page-faq .hero-chip:nth-child(2) {
    margin-left: 18px;
  }

  .page-faq .hero-chip:nth-child(3) {
    margin-left: 36px;
  }

  .page-faq .next-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-block {
    padding: 68px 0;
  }

  .page-faq .section-head {
    gap: 22px;
    margin-bottom: 38px;
  }
}

@media (min-width: 960px) {
  .page-faq .step-layout {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 46px;
    align-items: start;
  }

  .page-faq .step-aside {
    position: sticky;
    top: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index a,
  .page-faq .tabs__tab,
  .page-faq .next-link,
  .page-faq .step__panel,
  .page-faq .qa {
    transition: none;
  }

  .page-faq .faq-index a:hover,
  .page-faq .tabs__tab:hover,
  .page-faq .next-link:hover,
  .page-faq .next-link:focus-visible {
    transform: none;
  }
}