.page-faq {
  --cat: var(--red);
  --qa-meta-w: 208px;
  --qa-pad: clamp(14px, 1.8vw, 22px);
  display: block;
  position: relative;
  overflow-x: clip;
  background: var(--ink);
  color: var(--white);
}

.page-faq .faq-crumb {
  padding: clamp(16px, 2vw, 26px) 0 clamp(10px, 1.4vw, 18px);
}

.page-faq .breadcrumb__sep {
  margin: 0 8px;
  color: var(--line);
}

/* ---------- hero ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(112deg, rgba(226, 49, 39, .17) 0%, rgba(226, 49, 39, 0) 44%),
    linear-gradient(248deg, rgba(32, 80, 224, .2) 0%, rgba(32, 80, 224, 0) 48%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(38, 45, 58, .6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(38, 45, 58, .5) 1px, transparent 1px);
  background-size: 52px 52px;
  opacity: .55;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 80%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 80%);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 54px);
  padding: clamp(30px, 5vw, 74px) 0 clamp(34px, 5vw, 78px);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(32px, 5.6vw, 70px);
  line-height: 1.06;
  letter-spacing: -.015em;
  color: var(--white);
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
  margin: clamp(16px, 2vw, 26px) 0 0;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.8;
  color: rgba(245, 247, 250, .78);
}

.page-faq .faq-hero__side {
  display: grid;
  gap: 14px;
  align-content: start;
  border-top: 2px solid var(--line);
  padding-top: 20px;
}

.page-faq .fact {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--cat);
}

.page-faq .faq-hero__side .fact:nth-child(1) { --cat: var(--red); }
.page-faq .faq-hero__side .fact:nth-child(2) { --cat: var(--blue); }
.page-faq .faq-hero__side .fact:nth-child(3) { --cat: var(--cyan); }
.page-faq .faq-hero__side .fact:nth-child(4) { --cat: var(--gold); }

.page-faq .fact__num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(24px, 2.4vw, 34px);
  line-height: 1;
  color: var(--white);
}

.page-faq .fact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  line-height: 1.5;
  color: var(--muted);
}

@media (min-width: 940px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 13fr) minmax(232px, 4fr);
    align-items: end;
  }
}

/* ---------- jump nav ---------- */
.page-faq .faq-nav {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 14px 0;
  list-style: none;
}

.page-faq .faq-nav__link {
  display: inline-block;
  padding: 6px 11px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color .22s var(--ease), border-color .22s var(--ease), background-color .22s var(--ease);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  color: var(--white);
  border-color: var(--blue);
  background: rgba(32, 80, 224, .16);
  outline: none;
}

/* ---------- groups ---------- */
.page-faq .faq-group {
  padding: clamp(34px, 5vw, 68px) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--bar-h) + 18px);
}

.page-faq .faq-group--blue { --cat: var(--blue); }
.page-faq .faq-group--cyan { --cat: var(--cyan); }
.page-faq .faq-group--gold { --cat: var(--gold); }
.page-faq .faq-group--amber { --cat: var(--amber); }

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.2vw, 30px);
  align-items: start;
  margin-bottom: clamp(18px, 2.6vw, 34px);
}

.page-faq .faq-group__head .section-num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(30px, 4.4vw, 60px);
  line-height: .9;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--cat);
}

.page-faq .faq-group__head h2 {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(20px, 2.4vw, 32px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-group__intro {
  max-width: 66ch;
  margin: 0 0 clamp(18px, 2.4vw, 28px);
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(245, 247, 250, .76);
}

/* ---------- qa ---------- */
.page-faq .qa-list {
  border-top: 1px solid var(--line);
}

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

.page-faq .qa__q {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: clamp(10px, 1.4vw, 20px);
  align-items: start;
  padding: var(--qa-pad) clamp(8px, 1.2vw, 16px);
  border-left: 3px solid transparent;
  cursor: pointer;
  list-style: none;
  transition: background-color .24s var(--ease), border-color .24s var(--ease);
}

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

.page-faq .qa__q:hover { background: rgba(245, 247, 250, .04); }

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cat);
  outline-offset: -2px;
}

.page-faq .qa[open] > .qa__q {
  border-left-color: var(--cat);
  background: rgba(245, 247, 250, .035);
}

.page-faq .qa__idx {
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .qa__text {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.55;
  color: var(--white);
}

.page-faq .qa__mark {
  position: relative;
  align-self: center;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: transform .24s var(--ease), background-color .24s var(--ease);
}

.page-faq .qa__mark::before { left: 0; right: 0; top: 6px; height: 2px; }
.page-faq .qa__mark::after { top: 0; bottom: 0; left: 6px; width: 2px; }

.page-faq .qa[open] .qa__mark::before { background: var(--cat); }
.page-faq .qa[open] .qa__mark::after { transform: scaleY(0); }

.page-faq .qa__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.2vw, 30px);
  margin-left: 3px;
  padding: 0 clamp(8px, 1.2vw, 16px) clamp(22px, 2.8vw, 34px);
  border-left: 3px solid var(--cat);
}

.page-faq .qa__answer {
  max-width: 68ch;
}

.page-faq .qa__answer p {
  margin: 0;
  font-size: clamp(15px, 1.05vw, 16.5px);
  line-height: 1.8;
  color: rgba(245, 247, 250, .8);
}

.page-faq .qa__answer p + p { margin-top: 12px; }

.page-faq .qa__answer .qa__lead {
  padding: 2px 0 2px 14px;
  border-left: 3px solid var(--cat);
  font-weight: 500;
  font-size: clamp(15.5px, 1.1vw, 17px);
  color: var(--white);
}

.page-faq .qa__meta {
  padding-top: 12px;
  border-top: 2px solid var(--line);
}

.page-faq .qa__meta-key {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cat);
}

.page-faq .qa__meta ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .qa__meta li {
  padding: 3px 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--muted);
}

@media (min-width: 880px) {
  .page-faq .qa__body {
    grid-template-columns: minmax(0, 1fr) var(--qa-meta-w);
    align-items: start;
  }

  .page-faq .qa__meta {
    padding-top: 0;
    padding-left: 14px;
    border-top: 0;
    border-left: 2px solid var(--line);
  }
}

/* ---------- figures ---------- */
.page-faq .qa-media {
  max-width: 900px;
  margin: clamp(20px, 2.8vw, 32px) 0 clamp(4px, 1vw, 12px);
}

.page-faq .qa-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- glossary ---------- */
.page-faq .glossary {
  padding-top: clamp(12px, 1.8vw, 20px);
  border-top: 2px solid var(--line);
}

.page-faq .glossary__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 2px;
  border-bottom: 1px dashed var(--line);
  break-inside: avoid;
}

.page-faq .glossary__cn {
  font-size: 15px;
  line-height: 1.6;
  color: var(--white);
}

.page-faq .glossary__en {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: right;
}

@media (min-width: 900px) {
  .page-faq .glossary {
    columns: 2;
    column-gap: clamp(30px, 4vw, 64px);
  }
}

/* ---------- closing ---------- */
.page-faq .faq-closing {
  padding: clamp(36px, 5vw, 76px) 0 clamp(44px, 6vw, 88px);
  background:
    linear-gradient(118deg, rgba(226, 49, 39, .1) 0%, rgba(10, 12, 17, 0) 46%),
    linear-gradient(300deg, rgba(32, 80, 224, .12) 0%, rgba(10, 12, 17, 0) 50%);
}

.page-faq .faq-closing__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: end;
}

.page-faq .faq-closing h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 3.2vw, 44px);
  line-height: 1.15;
  color: var(--white);
}

.page-faq .faq-closing__text {
  max-width: 60ch;
  margin: 16px 0 0;
  font-size: clamp(15px, 1.05vw, 16.5px);
  line-height: 1.8;
  color: rgba(245, 247, 250, .76);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 880px) {
  .page-faq .faq-closing__grid {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__q,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-nav__link {
    transition: none;
  }
}
</main>