.page-faq {
  --faq-rail: 288px;
  --faq-gridline: rgba(30, 74, 63, 0.42);
  --faq-body: 16px;
  background: var(--bg);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq__hero {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 6vw, 88px) 0 clamp(34px, 5vw, 68px);
  border-bottom: 1px solid var(--line);
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--faq-gridline) 1px, transparent 1px),
    linear-gradient(to bottom, var(--faq-gridline) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.15) 78%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.15) 78%, transparent 100%);
  pointer-events: none;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: -32%;
  width: min(560px, 68vw);
  height: min(560px, 68vw);
  background: radial-gradient(circle, var(--cyan-dim) 0%, transparent 68%);
  pointer-events: none;
}

.page-faq__hero > .container {
  position: relative;
  z-index: 1;
}

.page-faq__eyebrow {
  margin: 26px 0 0;
}

.page-faq__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 8.4vw, 100px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq__lede {
  margin: 26px 0 0;
  max-width: 36em;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.9;
  color: var(--muted);
}

.page-faq__herofacts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 34px;
  margin: 34px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq__herofacts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}

.page-faq__herofacts .mono {
  font-size: 24px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-faq__herofacts li:nth-child(3) .mono {
  color: var(--orange);
}

/* ---------- 通用区块节奏 ---------- */
.page-faq__quick,
.page-faq__manual,
.page-faq__glossary {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-faq__manual {
  background: var(--bg-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq__quickfig {
  margin: 0 0 clamp(34px, 4vw, 52px);
  border: 1px solid var(--line);
}

/* ---------- 快问三则 ---------- */
.page-faq__quickgrid {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq__quickitem {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 22px 24px;
  background: var(--card);
}

.page-faq__quickno {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq__quickno::after {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  margin-top: 9px;
  background: var(--orange);
}

.page-faq__quickq {
  margin: 0;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.5;
  font-weight: 700;
  color: var(--white);
}

.page-faq__quicka {
  flex: 1;
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.page-faq__quickitem .btn--text {
  align-self: flex-start;
  margin-top: 6px;
}

@media (min-width: 800px) {
  .page-faq__quickgrid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq__quickitem {
    padding: 36px 30px 32px;
  }
}

/* ---------- 双栏问答册 ---------- */
.page-faq__board {
  display: grid;
  gap: 10px;
}

.page-faq__rail {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-top: 20px;
  border-top: 2px solid var(--cyan);
}

.page-faq__railtitle {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-faq__railnav {
  display: flex;
  flex-direction: column;
  margin-top: -12px;
}

.page-faq__raillink {
  position: relative;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 12px 0 12px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
  color: var(--ink);
  text-decoration: none;
  transition: color 0.16s ease;
}

.page-faq__raillink::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 50%;
  width: 2px;
  height: 20px;
  margin-top: -10px;
  background: var(--cyan);
  opacity: 0;
  transition: opacity 0.16s ease;
}

.page-faq__raillink:hover {
  color: var(--cyan);
}

.page-faq__raillink:hover::before,
.page-faq__raillink:focus-visible::before {
  opacity: 1;
}

.page-faq__raillink:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-faq__railidx {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq__railnum {
  font-size: 12px;
  color: var(--muted);
}

.page-faq__filterwrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
}

.page-faq__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq__filter .filter__btn {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

.page-faq__filter .filter__btn:hover {
  color: var(--ink);
  border-color: var(--cyan);
}

.page-faq__filter .filter__btn[aria-pressed="true"],
.page-faq__filter .filter__btn.is-active {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-on-cyan);
}

.page-faq__countline {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
}

.page-faq__countline .filter__count {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.page-faq__countunit {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* ---------- 问答条目 ---------- */
.page-faq__qa {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
  min-width: 0;
}

.page-faq__item {
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--hdr-h) + 28px);
}

.page-faq__item[hidden] {
  display: none;
}

.page-faq__summary {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 16px;
  align-items: start;
  gap: 12px;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq__summary::marker {
  content: "";
}

.page-faq__summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-faq__no {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq__q {
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
  line-height: 1.62;
  color: var(--ink);
  transition: color 0.16s ease;
}

.page-faq__summary:hover .page-faq__q {
  color: var(--cyan);
}

.page-faq__mark {
  position: relative;
  display: block;
  width: 14px;
  height: 14px;
  margin-top: 7px;
}

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

.page-faq__mark::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq__mark::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}

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

.page-faq__a {
  display: grid;
  gap: 16px;
  padding: 0 0 28px;
}

.page-faq__a p {
  margin: 0;
  max-width: 40em;
  font-size: var(--faq-body);
  line-height: 1.9;
  color: var(--muted);
}

.page-faq__verdict {
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  color: var(--ink) !important;
  font-weight: 600;
}

.page-faq__term {
  color: var(--cyan);
  border-bottom: 1px dashed rgba(47, 230, 200, 0.55);
  padding-bottom: 1px;
  word-break: break-word;
}

.page-faq__empty {
  margin: 0;
  padding: 30px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-faq__a {
    padding-left: 42px;
  }

  .page-faq__summary {
    padding: 26px 0;
  }
}

@media (min-width: 1000px) {
  .page-faq__board {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }

  .page-faq__rail {
    position: sticky;
    top: calc(var(--hdr-h) + 26px);
  }

  .page-faq__railnav {
    margin-top: -12px;
  }
}

/* ---------- 术语速查 ---------- */
.page-faq__glossarygrid {
  display: grid;
  gap: 32px;
}

.page-faq__glossfigure {
  margin: 0;
  border: 1px solid var(--line);
}

.page-faq__glossfigure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.72) brightness(0.86);
}

.page-faq__glossarylist {
  display: grid;
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq__glossterm {
  padding: 20px 22px;
  background: var(--bg);
}

.page-faq__glossarylist dt {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq__glossarylist dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--rule);
}

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

@media (min-width: 960px) {
  .page-faq__glossarygrid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }
}

/* ---------- 无障碍与降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq__raillink,
  .page-faq__raillink::before,
  .page-faq__q,
  .page-faq__mark::before,
  .page-faq__mark::after,
  .page-faq__filter .filter__btn {
    transition: none;
  }
}
<<<END>>>