.page-faq {
  --faq-rail: 268px;
  --faq-tint: rgba(56, 242, 200, 0.055);
  display: block;
}

/* 首屏 */
.page-faq .hero {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--console) 0%, var(--night) 82%);
  padding-block: clamp(28px, 5vw, 52px) clamp(40px, 6vw, 76px);
}

.page-faq .hero__grid {
  display: grid;
  gap: 32px;
  align-items: end;
}

.page-faq .hero .crumbs {
  margin-bottom: clamp(22px, 4vw, 40px);
}

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

.page-faq .crumbs__item {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

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

.page-faq .crumbs__link {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t), border-color var(--t);
}

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

.page-faq .hero__lead .eyebrow {
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-faq .hero__lead h1.display {
  margin: 0 0 clamp(16px, 2.5vw, 26px);
  letter-spacing: -0.02em;
  line-height: 0.98;
}

.page-faq .hero__lead .lede {
  margin: 0;
  max-width: 60ch;
  color: var(--text);
}

.page-faq .hero__panel {
  padding: 22px 24px 24px;
  border-left: 2px solid var(--amber);
  background: var(--carbon);
}

.page-faq .hero__panel .panel__head {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .hero__panel-value {
  margin: 0;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1;
  color: var(--paper);
}

.page-faq .hero__panel-note {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.page-faq .hero__panel-foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* 主体两栏 */
.page-faq .faq-shell {
  padding-block: clamp(36px, 5vw, 64px) clamp(56px, 8vw, 104px);
  display: grid;
  gap: 36px;
  align-items: start;
}

/* 侧边索引 */
.page-faq .index-rail {
  border: 1px solid var(--line);
  background: var(--carbon);
  padding: 16px 18px 18px;
}

.page-faq .index-rail__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .index-list__item {
  flex: 0 0 auto;
}

.page-faq .index-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--t), color var(--t), background var(--t);
}

.page-faq .index-link__count {
  font-size: 11px;
  color: var(--muted);
  transition: color var(--t);
}

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

.page-faq .index-link:hover .index-link__count,
.page-faq .index-link:focus-visible .index-link__count {
  color: var(--cyan);
}

.page-faq .index-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* 问答区块 */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-block {
  margin-bottom: clamp(48px, 7vw, 88px);
}

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

.page-faq .faq-block__head {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  margin-bottom: 8px;
}

.page-faq .faq-block__index {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-faq .faq-block__title {
  margin: 0 0 10px;
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-block__intro {
  margin: 0 0 22px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 折叠问答 */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  background: transparent;
}

.page-faq .faq-item__q {
  position: relative;
  display: block;
  list-style: none;
  cursor: pointer;
  padding: 17px 40px 17px 14px;
  border-left: 2px solid transparent;
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
  transition: border-color var(--t), color var(--t), background var(--t);
}

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

.page-faq .faq-item__q::after {
  content: "";
  position: absolute;
  right: 16px;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -6px;
  border-right: 1px solid var(--muted);
  border-bottom: 1px solid var(--muted);
  transform: rotate(45deg);
  transition: transform var(--t), border-color var(--t);
}

.page-faq .faq-item__q:hover {
  background: var(--faq-tint);
  border-left-color: var(--line);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-item[open] > .faq-item__q {
  border-left-color: var(--cyan);
  color: var(--paper);
}

.page-faq .faq-item[open] > .faq-item__q::after {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-faq .faq-item__a {
  padding: 0 34px 22px 16px;
  border-left: 2px solid var(--cyan);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

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

.page-faq .faq-item__a .link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--t);
}

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

/* 换设备步骤条 */
.page-faq .steps {
  display: grid;
  gap: 14px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-faq .steps__item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-faq .steps__num {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber);
  padding-top: 3px;
}

.page-faq .steps__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

/* 配图 */
.page-faq .faq-media {
  margin: 0 0 26px;
  border: 1px solid var(--line);
  background: var(--carbon);
}

.page-faq .faq-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 1000 / 640;
}

.page-faq .faq-media--wide img {
  aspect-ratio: 900 / 600;
}

.page-faq .faq-media figcaption {
  padding: 11px 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* 联系方式 */
.page-faq .contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-faq .contact-item {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 18px 20px 20px;
  transition: background var(--t);
}

.page-faq .contact-item:hover {
  background: var(--faq-tint);
}

.page-faq .contact-item__label {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .contact-item__value {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-note {
  margin: 20px 0 0;
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-cta {
  margin: 24px 0 0;
}

/* 桌面分栏 */
@media (min-width: 900px) {
  .page-faq .hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
  }

  .page-faq .hero__panel {
    padding: 26px 28px 28px;
  }

  .page-faq .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-faq .steps__item {
    flex-direction: column;
    gap: 8px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 64px;
  }

  .page-faq .index-rail {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

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

  .page-faq .index-list__item {
    flex: 1 1 auto;
  }

  .page-faq .index-link {
    justify-content: space-between;
    white-space: normal;
    border: 0;
    border-left: 2px solid transparent;
    padding: 11px 0 11px 14px;
    font-size: 15px;
  }

  .page-faq .index-link:hover,
  .page-faq .index-link:focus-visible {
    border-left-color: var(--cyan);
    background: var(--faq-tint);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .index-link,
  .page-faq .crumbs__link,
  .page-faq .contact-item {
    transition: none;
  }
}