.page-faq {
  --faq-rail: 250px;
  --faq-gap: 48px;
  background: var(--paper);
  color: var(--text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-top {
  position: relative;
  padding-block: 18px 0;
  border-bottom: 1px solid var(--fog);
  background-color: var(--paper);
}

.page-faq .faq-top::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--fog) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.5;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to left, #000 0%, transparent 62%);
  mask-image: linear-gradient(to left, #000 0%, transparent 62%);
}

.page-faq .faq-top .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero {
  padding-block: 22px 6px;
  max-width: 900px;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 6.2vw, 62px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--ink);
  max-width: 18ch;
}

.page-faq .faq-hero__lede {
  margin-top: 18px;
  max-width: 60ch;
  color: var(--text);
}

/* ---------- 四个快速入口 ---------- */
.page-faq .faq-quick {
  padding-block: 30px 38px;
}

.page-faq .faq-quick__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate-deep);
}

.page-faq .faq-quick__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .faq-entry {
  position: relative;
  display: block;
  padding: 18px 16px 20px;
  background: var(--card);
  border: 1px solid var(--fog);
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-entry::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 3px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}

.page-faq .faq-entry:hover,
.page-faq .faq-entry:focus-visible {
  border-color: var(--slate);
  background: var(--card);
}

.page-faq .faq-entry:hover::before,
.page-faq .faq-entry:focus-visible::before {
  transform: scaleX(1);
}

.page-faq .faq-entry__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--deep-celadon);
}

.page-faq .faq-entry__title {
  display: block;
  margin-top: 10px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.page-faq .faq-entry__text {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--slate-deep);
}

/* ---------- 主栅格 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-block: 36px 64px;
}

/* ---------- 章节索引 ---------- */
.page-faq .faq-rail__label {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate-deep);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--fog);
}

.page-faq .faq-rail__list li + li {
  margin-top: 2px;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0 9px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: 15px;
  line-height: 1.45;
  color: var(--slate-deep);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--ink);
  border-left-color: var(--amber);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-faq .faq-rail__note {
  margin-top: 22px;
  padding: 14px 14px 16px;
  background: var(--card);
  border: 1px solid var(--fog);
  border-left: 3px solid var(--celadon);
}

.page-faq .faq-rail__note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-deep);
}

.page-faq .faq-rail__note a {
  color: var(--deep-celadon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-faq .faq-section + .faq-section {
  margin-top: 56px;
}

.page-faq .faq-section__head {
  display: grid;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid var(--ink);
  margin-bottom: 24px;
}

.page-faq .faq-section__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--ink);
  max-width: 22ch;
}

.page-faq .faq-section__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-deep);
}

/* ---------- 四步指南 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .faq-step {
  padding: 18px 16px 20px;
  background: var(--card);
  border: 1px solid var(--fog);
  border-top: 2px solid var(--celadon);
}

.page-faq .faq-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--deep-celadon);
}

.page-faq .faq-step__title {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .faq-step__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate-deep);
}

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

/* ---------- 大屏设置 ---------- */
.page-faq .faq-display {
  padding: 26px 20px 28px;
  background: var(--harbor);
  color: var(--paper);
}

.page-faq .faq-display .faq-section__head {
  border-top-color: var(--amber);
}

.page-faq .faq-display .eyebrow {
  color: var(--amber);
}

.page-faq .faq-display .faq-section__head h2 {
  color: var(--paper);
}

.page-faq .faq-display .faq-section__lede {
  color: var(--fog);
}

.page-faq .faq-display__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

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

.page-faq .faq-display__list li {
  padding-left: 16px;
  border-left: 2px solid var(--celadon);
  font-size: 15px;
  line-height: 1.75;
  color: var(--fog);
}

.page-faq .faq-display__list strong {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-display__figure {
  margin: 0;
}

.page-faq .faq-display__figure .media-frame__caption {
  color: var(--fog);
}

/* ---------- 常见问题 ---------- */
.page-faq .faq-filter {
  margin-bottom: 10px;
  row-gap: 8px;
}

.page-faq .faq-filter + .filter-count {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate-deep);
}

.page-faq .faq-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--fog);
}

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

.page-faq .faq-item details {
  background: transparent;
}

.page-faq .faq-item details[open] {
  background: var(--card);
}

.page-faq .faq-item__q {
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 6px 16px 2px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  transition: color 0.18s var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--deep-celadon);
}

.page-faq .faq-item__n {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--slate);
}

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

.page-faq .faq-item__sign {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  align-self: center;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--amber);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.page-faq .faq-item__sign::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__sign::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item details[open] .faq-item__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 6px 20px 30px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-deep);
}

.page-faq .filter-empty {
  margin: 18px 0 0;
  padding: 14px 16px;
  background: var(--card);
  border: 1px dashed var(--fog);
  font-size: 14px;
  color: var(--slate-deep);
}

/* ---------- 阅读路径 ---------- */
.page-faq .faq-path {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-path__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 16px 16px 16px 18px;
  background: var(--card);
  border: 1px solid var(--fog);
  border-left: 3px solid var(--celadon);
}

.page-faq .faq-path__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--deep-celadon);
}

.page-faq .faq-path__main h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .faq-path__main p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate-deep);
}

.page-faq .faq-path__link {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--deep-celadon);
  text-decoration: none;
  border-bottom: 1px solid var(--celadon);
  padding-bottom: 2px;
}

.page-faq .faq-path__link:hover {
  color: var(--ink);
  border-bottom-color: var(--amber);
}

.page-faq .faq-path__foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-deep);
}

.page-faq .faq-path__foot a {
  color: var(--deep-celadon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-assist__box {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  padding: 24px 20px 26px;
  background: var(--amber);
  color: var(--ink);
}

.page-faq .faq-assist__eyebrow {
  color: var(--ink);
}

.page-faq .faq-assist__text h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-faq .faq-assist__text p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  opacity: 0.86;
}

.page-faq .faq-assist__contact {
  display: grid;
  gap: 10px;
  padding: 16px;
  background: var(--card);
  border: 1px solid var(--ink);
}

.page-faq .faq-assist__row {
  display: grid;
  gap: 2px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--fog);
}

.page-faq .faq-assist__row:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-assist__k {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--slate-deep);
}

.page-faq .faq-assist__v {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-assist__btn {
  justify-self: start;
  margin-top: 4px;
}

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

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

  .page-faq .faq-path__row {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 16px;
  }

  .page-faq .faq-path__link {
    justify-self: end;
  }

  .page-faq .faq-assist__box {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
    padding: 30px 28px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-quick__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-faq .faq-display {
    padding: 32px 32px 34px;
  }

  .page-faq .faq-display__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 32px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
    padding-block: 48px 88px;
  }

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

  .page-faq .faq-hero__lede {
    font-size: 19px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-entry,
  .page-faq .faq-entry::before,
  .page-faq .faq-rail__link,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after {
    transition: none;
  }
}