.page-faq {
  --faq-block-gap: clamp(44px, 6vw, 84px);
  --faq-hair: 1px solid var(--line);
  background: var(--paper);
  color: var(--text);
  padding-bottom: clamp(56px, 8vw, 110px);
}

.page-faq .faq-crumb {
  padding-top: clamp(16px, 2.6vw, 26px);
  padding-bottom: 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: clamp(14px, 2.2vw, 24px);
  background: var(--ink);
  color: var(--on-ink);
  overflow: hidden;
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: repeating-linear-gradient(118deg, rgba(52, 168, 124, 0.085) 0 1px, transparent 1px 26px);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--bamboo-bright) 0%, var(--copper) 54%, rgba(185, 106, 50, 0) 100%);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.6vw, 46px);
  padding-top: clamp(36px, 5.5vw, 70px);
  padding-bottom: clamp(32px, 5vw, 60px);
}

.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--bamboo-bright);
}

.page-faq .faq-hero__kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--copper);
  flex: none;
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--on-ink);
}

.page-faq .faq-hero h1 em {
  font-style: normal;
  color: var(--bamboo-bright);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.85;
  color: var(--on-ink-soft);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--on-ink-faint);
}

.page-faq .faq-hero__facts li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-hero__facts li::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--copper);
  flex: none;
}

.page-faq .faq-hero__panel {
  display: grid;
  gap: 14px;
  align-content: end;
}

.page-faq .faq-search {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  text-decoration: none;
  color: var(--on-ink);
  background: rgba(243, 237, 225, 0.07);
  border: 1px solid var(--ink-line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-search:hover,
.page-faq .faq-search:focus-visible {
  background: rgba(52, 168, 124, 0.18);
  transform: translateX(2px);
}

.page-faq .faq-search__icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(52, 168, 124, 0.55);
  color: var(--bamboo-bright);
}

.page-faq .faq-search__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--bamboo-bright);
}

.page-faq .faq-search__hint {
  display: block;
  margin-top: 5px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--on-ink-soft);
}

.page-faq .faq-search__hint kbd {
  display: inline-block;
  padding: 1px 6px;
  margin: 0 1px;
  font-family: var(--font-mono);
  font-size: 12px;
  border: 1px solid var(--ink-line);
  color: var(--on-ink);
}

.page-faq .faq-hero__dl {
  width: 100%;
  text-align: center;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4.4vw, 56px);
  padding-top: clamp(40px, 6vw, 78px);
}

.page-faq .faq-flow {
  display: grid;
  gap: var(--faq-block-gap);
  min-width: 0;
}

/* ---------- 左栏：三步排查 ---------- */
.page-faq .faq-rail__head .t-idx {
  margin: 0;
  color: var(--copper);
  letter-spacing: 0.16em;
}

.page-faq .faq-rail__head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.5vw, 28px);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-faq .faq-rail__head > p:last-child {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-steps {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 17px 18px;
  text-decoration: none;
  color: inherit;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-left: 4px solid var(--bamboo);
  transition: border-left-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-step:hover,
.page-faq .faq-step:focus-visible {
  background: var(--paper);
  border-left-color: var(--bamboo-bright);
  transform: translateX(3px);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  padding-top: 3px;
  color: var(--copper);
  letter-spacing: -0.02em;
}

.page-faq .faq-step__title {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-step__desc {
  display: block;
  margin-top: 9px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-step__expect {
  display: block;
  margin-top: 11px;
  padding-top: 11px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--bamboo);
}

.page-faq .faq-rail__figure {
  margin: 22px 0 0;
}

.page-faq .faq-rail__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.page-faq .faq-rail__figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 区块标题微调 ---------- */
.page-faq .faq-block .section-head__num {
  color: var(--copper);
}

.page-faq .faq-block .section-head__title,
.page-faq .faq-errata .section-head__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.26;
  letter-spacing: -0.02em;
}

.page-faq .faq-block .section-head__desc,
.page-faq .faq-errata .section-head__desc {
  margin-top: 12px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

/* ---------- 检索技巧 ---------- */
.page-faq .faq-match {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--faq-hair);
}

.page-faq .faq-match li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 2px;
  border-bottom: var(--faq-hair);
}

.page-faq .faq-match__k {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--bamboo);
}

.page-faq .faq-match__v {
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
}

.page-faq .faq-syn {
  margin-top: 28px;
  padding: 20px 22px 22px;
  background: var(--paper-2);
  border: 1px dashed var(--line);
}

.page-faq .faq-syn__label {
  margin: 0 0 15px;
  color: var(--copper);
  letter-spacing: 0.14em;
}

.page-faq .faq-syn__list {
  display: flex;
  flex-wrap: wrap;
  gap: 11px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-syn__list li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-syn__list .tag {
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%);
}

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

.page-faq .faq-figure {
  margin: 28px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 折叠问题组 ---------- */
.page-faq .faq-acc {
  margin-top: 28px;
  border-top: var(--faq-hair);
}

.page-faq .faq-acc .accordion__item {
  position: relative;
  border-bottom: var(--faq-hair);
}

.page-faq .faq-acc .accordion__trigger {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 19px 4px 19px 22px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 16.5px;
  font-weight: 600;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-acc .accordion__trigger:hover {
  color: var(--bamboo);
}

.page-faq .faq-acc .accordion__trigger::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  bottom: 17px;
  width: 4px;
  background: var(--copper);
  transition: top var(--dur) var(--ease), bottom var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-acc .accordion__trigger[aria-expanded="true"]::before {
  top: 8px;
  bottom: 8px;
  background: var(--bamboo-bright);
}

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

.page-faq .faq-acc__count {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
  padding: 3px 8px;
  border: 1px solid var(--line);
  white-space: nowrap;
}

.page-faq .faq-acc__mark {
  width: 11px;
  height: 11px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-acc .accordion__trigger[aria-expanded="true"] .faq-acc__mark {
  transform: rotate(-135deg);
  border-color: var(--bamboo);
}

.page-faq .faq-acc .accordion__panel {
  overflow: hidden;
}

.page-faq .faq-acc .accordion__body {
  display: grid;
  gap: 18px;
  padding: 2px 8px 26px 22px;
}

.page-faq .faq-qa__q {
  position: relative;
  margin: 0;
  padding-left: 26px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.66;
  color: var(--text);
}

.page-faq .faq-qa__q::before {
  content: "Q";
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--copper);
}

.page-faq .faq-qa__a {
  position: relative;
  margin: 8px 0 0;
  padding-left: 26px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--muted);
}

.page-faq .faq-qa__a::before {
  content: "A";
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--bamboo);
}

/* ---------- 下半部分 ---------- */
.page-faq .faq-lower {
  display: grid;
  gap: var(--faq-block-gap);
  padding-top: var(--faq-block-gap);
}

/* ---------- 版本对照表 ---------- */
.page-faq .faq-map__scroll {
  margin-top: 28px;
  overflow-x: auto;
  border: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-map {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-faq .faq-map caption {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page-faq .faq-map th {
  padding: 13px 16px;
  text-align: left;
  background: var(--ink-2);
  color: var(--on-ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.page-faq .faq-map td {
  padding: 15px 16px;
  border-top: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.72;
  color: var(--text);
}

.page-faq .faq-map tbody tr:nth-child(even) {
  background: var(--paper-2);
}

.page-faq .faq-map__old {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
  text-decoration: line-through;
  text-decoration-color: rgba(138, 106, 47, 0.55);
  white-space: nowrap;
}

.page-faq .faq-map__new {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--bamboo);
  white-space: nowrap;
}

.page-faq .faq-map__round {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-map__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 勘误提交 ---------- */
.page-faq .faq-errata {
  position: relative;
  padding: clamp(28px, 4.4vw, 52px);
  background: var(--ink);
  color: var(--on-ink);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

.page-faq .faq-errata .section-head__num {
  color: var(--bamboo-bright);
}

.page-faq .faq-errata .section-head__title {
  color: var(--on-ink);
}

.page-faq .faq-errata .section-head__desc {
  color: var(--on-ink-soft);
}

.page-faq .faq-errata__items {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-errata__item {
  padding: 16px 16px 18px;
  background: rgba(243, 237, 225, 0.05);
  border: 1px solid var(--ink-line);
}

.page-faq .faq-errata__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--bamboo-bright);
}

.page-faq .faq-errata__name {
  display: block;
  margin-top: 9px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--on-ink);
}

.page-faq .faq-errata__desc {
  display: block;
  margin-top: 7px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--on-ink-soft);
}

.page-faq .faq-errata__note {
  margin: 26px 0 0;
  max-width: 60ch;
  padding-top: 20px;
  border-top: 1px solid var(--ink-line);
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--on-ink-soft);
}

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

.page-faq .faq-errata__actions .btn--ghost {
  color: var(--on-ink);
  border-color: rgba(243, 237, 225, 0.42);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-match li {
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

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

@media (min-width: 940px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(300px, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-faq .faq-errata__items {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-hero h1 {
    max-width: 22ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-search,
  .page-faq .faq-step,
  .page-faq .faq-acc .accordion__trigger,
  .page-faq .faq-acc .accordion__trigger::before,
  .page-faq .faq-acc__mark {
    transition: none;
  }

  .page-faq .faq-search:hover,
  .page-faq .faq-step:hover {
    transform: none;
  }
}