.page-faq {
  position: relative;
}

.page-faq .faq-crumb-wrap {
  padding: 22px 0 10px;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink-900);
  padding: clamp(32px, 6vw, 74px) 0 clamp(30px, 5vw, 62px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 72px);
  opacity: .45;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 48%;
  height: 100%;
  pointer-events: none;
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
  background: linear-gradient(158deg, rgba(0, 229, 208, .14), rgba(5, 7, 15, 0) 64%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 68px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 22ch;
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--cyan);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--body-text);
}

.page-faq .faq-hero__panel {
  margin: 0;
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  background: rgba(11, 18, 36, .74);
}

.page-faq .faq-hero__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__row:last-child {
  border-bottom: 0;
}

.page-faq .faq-hero__row dt {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .faq-hero__row dd {
  margin: 0;
  display: flex;
  align-items: baseline;
}

.page-faq .faq-hero__num {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--white);
}

.page-faq .faq-hero__row:first-child .faq-hero__num {
  color: var(--orange);
}

.page-faq .faq-hero__unit {
  margin-left: 5px;
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-hero__mono {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--cyan);
}

@media (min-width: 960px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.25fr) minmax(250px, .75fr);
    align-items: end;
    gap: clamp(28px, 5vw, 64px);
  }
  .page-faq .faq-hero__panel {
    transform: translateY(-6px);
  }
}

/* ============ 分类索引 ============ */
.page-faq .faq-index .ht-section__note {
  max-width: 70ch;
}

.page-faq .faq-index__grid {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .faq-index__cell {
  position: relative;
  display: block;
  padding: 20px 18px 24px;
  background: var(--ink-800);
  text-decoration: none;
  color: inherit;
  transition: background .28s var(--ease);
}

.page-faq .faq-index__cell::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--cyan);
  transition: width .34s var(--ease);
}

.page-faq .faq-index__n {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-faq .faq-index__name {
  display: block;
  margin-top: 12px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-index__count {
  display: inline-block;
  margin-top: 10px;
  padding: 2px 8px;
  border: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-faq .faq-index__desc {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--body-text);
}

@media (hover: hover) {
  .page-faq .faq-index__cell:hover {
    background: var(--ink-700);
  }
  .page-faq .faq-index__cell:hover::after {
    width: 100%;
  }
}

.page-faq .faq-index__figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

@media (min-width: 720px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ============ 手册主体 ============ */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  padding-top: clamp(36px, 6vw, 64px);
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
  }
}

/* 左侧固定目录 */
.page-faq .faq-toc {
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-faq .faq-toc__label {
  margin: 0;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .faq-toc__nav {
  display: flex;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}

.page-faq .faq-toc__link {
  display: flex;
  flex: none;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  color: var(--body-text);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  transition: background .25s var(--ease), color .25s var(--ease);
}

.page-faq .faq-toc__link:last-child {
  border-right: 0;
}

.page-faq .faq-toc__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-toc__name {
  flex: 1 1 auto;
}

.page-faq .faq-toc__n {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-toc__foot {
  padding: 14px 16px 16px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-toc__hint {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

@media (hover: hover) {
  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    background: var(--ink-700);
    color: var(--white);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
  .page-faq .faq-toc__nav {
    display: block;
    overflow: visible;
  }
  .page-faq .faq-toc__link {
    border-right: 0;
    white-space: normal;
  }
  .page-faq .faq-toc__link:last-child {
    border-bottom: 0;
  }
}

/* 筛选条 */
.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-filters__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-faq .faq-live {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--muted);
}

/* 分类区块 */
.page-faq .faq-cat {
  padding-top: clamp(34px, 5vw, 56px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-cat__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-cat__num {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--line-soft);
}

.page-faq .faq-cat__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-cat__count {
  padding: 3px 8px;
  border: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-faq .faq-cat__lede {
  margin: 16px 0 6px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--body-text);
}

/* 折叠条目 */
.page-faq .faq-list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-item__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 2px;
  list-style: none;
  cursor: pointer;
  color: var(--white);
  font-size: 15.5px;
  line-height: 1.65;
  transition: color .24s var(--ease);
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  border: 1px solid var(--line-soft);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
}

.page-faq .faq-item__mark::before {
  left: 3px;
  right: 3px;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-item__mark::after {
  top: 3px;
  bottom: 3px;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
  transition: transform .28s var(--ease), opacity .28s var(--ease);
}

.page-faq .faq-item__box[open] .faq-item__mark::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
}

.page-faq .faq-item__a {
  padding: 0 2px 20px 30px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--body-text);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  max-width: 68ch;
}

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

.page-faq .faq-item__concl {
  padding: 10px 14px;
  border-left: 2px solid var(--cyan);
  background: var(--ink-700);
  color: var(--white);
}

@media (hover: hover) {
  .page-faq .faq-item__summary:hover {
    color: var(--cyan);
  }
}

.page-faq .faq-item__summary:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 2px;
}

@media (max-width: 519px) {
  .page-faq .faq-item__a {
    padding-left: 0;
  }
}

/* 排查步骤 */
.page-faq .faq-steps {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-step {
  display: grid;
  gap: 14px;
  padding: 22px 2px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-step__num {
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -0.03em;
  color: var(--line-soft);
}

.page-faq .faq-step__content {
  min-width: 0;
}

.page-faq .faq-step__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-step__text {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-faq .faq-step__branch {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.page-faq .faq-step__yes,
.page-faq .faq-step__no {
  display: block;
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  font-size: 13.5px;
  line-height: 1.65;
}

.page-faq .faq-step__yes {
  border-left: 2px solid var(--cyan);
  color: var(--white);
}

.page-faq .faq-step__no {
  border-left: 2px solid var(--orange);
  color: var(--body-text);
}

.page-faq .faq-check__figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

@media (min-width: 700px) {
  .page-faq .faq-step__branch {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-step {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: clamp(18px, 3vw, 36px);
    padding: 26px 2px;
  }
}

/* 联系前准备 */
.page-faq .faq-prepare {
  margin-top: clamp(32px, 5vw, 52px);
  padding: clamp(22px, 3.4vw, 36px);
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-faq .faq-prepare__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-prepare__list {
  display: grid;
  gap: 1px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: prep;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .faq-prepare__item {
  counter-increment: prep;
  position: relative;
  padding: 16px 18px 16px 62px;
  background: var(--ink-800);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--body-text);
}

.page-faq .faq-prepare__item::before {
  content: "0" counter(prep);
  position: absolute;
  left: 18px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-prepare__contact {
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-faq .faq-prepare__contact a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 208, .42);
  word-break: break-all;
}

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

/* 窄屏收敛 */
@media (max-width: 519px) {
  .page-faq .faq-hero::after {
    width: 70%;
    opacity: .7;
  }
  .page-faq .faq-index__cell {
    padding: 16px 14px 20px;
  }
  .page-faq .faq-hero__panel {
    border-top-width: 1px;
  }
  .page-faq .faq-prepare__item {
    padding: 14px 14px 14px 54px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__cell,
  .page-faq .faq-index__cell::after,
  .page-faq .faq-toc__link,
  .page-faq .faq-item__summary,
  .page-faq .faq-item__mark::after {
    transition: none;
  }
}