.page-faq {
  --faq-rule: rgba(107, 74, 47, 0.22);
  --faq-rule-soft: rgba(107, 74, 47, 0.12);
  --faq-rule-strong: rgba(107, 74, 47, 0.34);
  --faq-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

.page-faq__crumb {
  padding-top: clamp(14px, 2.5vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 6vw, 48px);
  align-items: start;
  padding-block: clamp(20px, 4vw, 36px) clamp(34px, 7vw, 68px);
}

.page-faq .faq-hero h1 {
  margin-top: 14px;
  font-family: var(--serif);
  font-size: clamp(1.9rem, 4.6vw, 3.35rem);
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 15em;
  text-wrap: balance;
}

.page-faq .faq-hero__lead {
  margin-top: 18px;
  max-width: 34em;
  color: var(--jade);
  font-size: 1.01rem;
  line-height: 1.85;
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 16px 22px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-hero__facts > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-hero__facts dt {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--jade);
}

.page-faq .faq-hero__facts dd {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--bronze);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

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

.page-faq .faq-hero__figure img,
.page-faq .faq-shortcuts__banner img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .faq-hero__figure .tb-figure__frame {
  border: 1px solid var(--faq-rule-soft);
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-board__head h2 {
  margin-top: 10px;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 600;
  line-height: 1.32;
  color: var(--ink);
}

.page-faq .faq-board__lead {
  margin-top: 12px;
  max-width: 44em;
  color: var(--jade);
  line-height: 1.82;
}

.page-faq .faq-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(34px, 6vw, 48px);
  margin-top: clamp(26px, 5vw, 46px);
}

.page-faq .faq-board__rule {
  display: none;
}

.page-faq .faq-col__head {
  padding-bottom: 14px;
  border-bottom: 2px solid var(--bronze);
}

.page-faq .faq-col__head h3 {
  font-family: var(--serif);
  font-size: 1.24rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--ink);
}

.page-faq .faq-col__head p {
  margin-top: 6px;
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  color: var(--jade);
}

/* ---------- 左栏问答 ---------- */
.page-faq .faq-qa {
  margin-top: 4px;
}

.page-faq .faq-qa__item {
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-qa__item:last-child {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-qa__item summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 1.5em;
  gap: 14px;
  align-items: start;
  padding: 16px 2px 16px 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.58;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-qa__item summary::after {
  content: "+";
  justify-self: end;
  font-family: var(--sans);
  font-size: 1.1rem;
  font-weight: 400;
  line-height: 1.45;
  color: var(--bronze-mist);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-qa__item summary:hover,
.page-faq .faq-qa__item[open] summary {
  color: var(--bronze);
}

.page-faq .faq-qa__item summary:hover::after,
.page-faq .faq-qa__item[open] summary::after {
  color: var(--bronze);
}

.page-faq .faq-qa__item[open] summary::after {
  content: "−";
}

.page-faq .faq-qa__item summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.page-faq .faq-qa__a {
  padding: 0 clamp(0px, 2vw, 16px) 20px 0;
  font-size: 0.95rem;
  line-height: 1.86;
  color: var(--jade);
}

.page-faq .faq-qa__a p + p {
  margin-top: 0.9em;
}

/* ---------- 右栏文档目录 ---------- */
.page-faq .faq-docs {
  margin-top: 18px;
}

.page-faq .faq-docs__group + .faq-docs__group {
  margin-top: clamp(24px, 3.4vw, 34px);
}

.page-faq .faq-docs__cat {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--faq-rule);
  font-family: var(--serif);
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--bronze);
}

.page-faq .faq-docs__cat span {
  font-family: var(--faq-mono);
  font-size: 0.64rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--jade);
  opacity: 0.7;
}

.page-faq .faq-docs__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-docs__item {
  display: grid;
  grid-template-columns: 4.4em minmax(0, 1fr);
  gap: 4px 12px;
  align-items: baseline;
  padding: 11px 10px 11px 4px;
  border-bottom: 1px solid var(--faq-rule-soft);
  transition: background-color 0.2s var(--ease);
}

.page-faq .faq-docs__item:hover,
.page-faq .faq-docs__item:focus-within {
  background: var(--gold-light);
}

.page-faq .faq-docs__num {
  grid-row: 1 / span 2;
  font-family: var(--faq-mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: var(--rust);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-docs__title {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .faq-docs__use {
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--jade);
}

.page-faq .faq-docs__note {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--faq-rule);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--jade);
}

/* ---------- 入口与收藏 ---------- */
.page-faq .faq-shortcuts {
  padding-block: clamp(38px, 7vw, 74px);
}

.page-faq .faq-shortcuts__banner {
  margin: 0 0 clamp(28px, 5vw, 46px);
}

.page-faq .faq-shortcuts__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4.5vw, 42px);
  align-items: start;
}

.page-faq .faq-shortcuts__text h2 {
  margin-top: 10px;
  font-family: var(--serif);
  font-size: clamp(1.45rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.34;
  color: var(--ink);
}

.page-faq .faq-shortcuts__text p {
  margin-top: 14px;
  max-width: 34em;
  color: var(--jade);
  line-height: 1.84;
}

.page-faq .faq-shortcuts__hint {
  padding-top: 16px;
  border-top: 1px solid var(--faq-rule);
  font-size: 0.9rem;
}

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

.page-faq .faq-shortcuts__list li {
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-shortcuts__list span {
  font-family: var(--faq-mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: var(--bronze);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-shortcuts__list strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
}

.page-faq .faq-shortcuts__list a {
  display: inline-block;
  margin-top: 5px;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--bronze);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 1px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

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

/* ---------- 仍未解决 ---------- */
.page-faq .faq-help {
  padding-block: clamp(42px, 7vw, 78px);
}

.page-faq .faq-help .tb-eyebrow {
  color: var(--gold-light);
}

.page-faq .faq-help h2 {
  margin-top: 10px;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 600;
  line-height: 1.34;
  color: var(--paper);
}

.page-faq .faq-help__head p {
  margin-top: 12px;
  max-width: 40em;
  font-size: 0.98rem;
  line-height: 1.84;
  color: rgba(246, 241, 231, 0.76);
}

.page-faq .faq-help__paths {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(26px, 4vw, 40px);
  background: rgba(246, 241, 231, 0.16);
}

.page-faq .faq-help__path {
  padding: clamp(20px, 3vw, 30px);
  background: var(--ink);
}

.page-faq .faq-help__path h3 {
  font-family: var(--serif);
  font-size: 1.06rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--gold-light);
}

.page-faq .faq-help__path p {
  margin-top: 10px;
  font-size: 0.92rem;
  line-height: 1.82;
  color: rgba(246, 241, 231, 0.78);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: clamp(24px, 4vw, 34px);
}

.page-faq .faq-help__save {
  margin-top: 22px;
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  color: rgba(246, 241, 231, 0.6);
}

/* ---------- 断点 ---------- */
@media (max-width: 480px) {
  .page-faq .faq-docs__item {
    grid-template-columns: minmax(0, 1fr);
    gap: 3px;
  }

  .page-faq .faq-docs__num {
    grid-row: auto;
    color: var(--bronze);
  }

  .page-faq .faq-shortcuts__list li,
  .page-faq .faq-qa__item summary {
    gap: 10px;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-help__paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(36px, 5vw, 64px);
  }

  .page-faq .faq-shortcuts__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-board {
    grid-template-columns: minmax(0, 5fr) 1px minmax(0, 6fr);
    column-gap: clamp(26px, 3.6vw, 52px);
  }

  .page-faq .faq-board__rule {
    display: block;
    min-height: 100%;
    background: linear-gradient(
      180deg,
      rgba(107, 74, 47, 0) 0%,
      var(--faq-rule) 10%,
      var(--faq-rule) 90%,
      rgba(107, 74, 47, 0) 100%
    );
  }

  .page-faq .faq-col {
    max-height: min(78vh, 900px);
    overflow-y: auto;
    padding-right: 8px;
    scrollbar-width: thin;
    scrollbar-color: var(--bronze-mist) transparent;
  }

  .page-faq .faq-col::-webkit-scrollbar {
    width: 6px;
  }

  .page-faq .faq-col::-webkit-scrollbar-track {
    background: transparent;
  }

  .page-faq .faq-col::-webkit-scrollbar-thumb {
    background: var(--bronze-mist);
    border-radius: 3px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-qa__item summary,
  .page-faq .faq-qa__item summary::after,
  .page-faq .faq-docs__item,
  .page-faq .faq-shortcuts__list a {
    transition: none;
  }
}