.page-faq {
  --faq-cut: 20px;
  --faq-gap: clamp(14px, 2.4vw, 26px);
  position: relative;
  background: var(--abyss);
  color: var(--mist);
  overflow-x: clip;
}

.page-faq [id] {
  scroll-margin-top: calc(var(--header-offset) + 16px);
}

.page-faq .faq-h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.6vw, 52px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-faq .faq-h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.25;
  color: var(--mist);
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .faq-block__no {
  display: inline-block;
  margin-bottom: 10px;
  padding-bottom: 2px;
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: 0.22em;
  border-bottom: 2px solid var(--cyan);
}

/* ---------- hero ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4vw, 48px) 0 clamp(56px, 8vw, 108px);
  background:
    radial-gradient(120% 88% at 4% -18%, rgba(18, 58, 94, 0.96) 0%, rgba(4, 18, 31, 0) 58%),
    linear-gradient(178deg, var(--hull) 0%, var(--abyss) 84%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), 0 100%);
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(22px, 3.4vw, 44px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 6px 0 16px;
  color: var(--mist);
}

.page-faq .faq-hero__lead {
  max-width: 46ch;
  font-size: clamp(15.5px, 1.25vw, 18px);
  line-height: 1.8;
  color: #c7dbe6;
}

.page-faq .faq-hero__meta {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-faq .faq-hero__meta .mono {
  color: var(--cyan-soft);
}

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

/* ---------- index ---------- */
.page-faq .faq-index {
  margin-top: calc(-1 * clamp(20px, 3vw, 40px));
  padding: clamp(34px, 5.5vw, 72px) 0 clamp(28px, 4vw, 50px);
}

.page-faq .faq-index__head {
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--faq-gap);
  grid-template-columns: 1fr;
}

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

.page-faq .faq-index__link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(158deg, rgba(18, 58, 94, 0.92) 0%, rgba(10, 37, 64, 0.7) 100%);
  color: var(--mist);
  text-decoration: none;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-faq .faq-index__item:nth-child(2n) .faq-index__link {
  border-radius: var(--radius-lg) var(--radius-lg) 6px var(--radius-lg);
}

.page-faq .faq-index__item:nth-child(3n) .faq-index__link {
  border-radius: 6px var(--radius-lg) var(--radius-lg) var(--radius-lg);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 18px 38px -26px rgba(43, 232, 208, 0.7);
}

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

.page-faq .faq-index__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: 0.01em;
}

.page-faq .faq-index__desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--slate);
}

.page-faq:has(#topic-entry:target) .faq-index__link[href="#topic-entry"],
.page-faq:has(#topic-version:target) .faq-index__link[href="#topic-version"],
.page-faq:has(#topic-account:target) .faq-index__link[href="#topic-account"],
.page-faq:has(#topic-security:target) .faq-index__link[href="#topic-security"],
.page-faq:has(#topic-assist:target) .faq-index__link[href="#topic-assist"] {
  border-color: var(--line-strong);
  box-shadow: inset 0 0 0 1px rgba(43, 232, 208, 0.28);
}

/* ---------- topic blocks ---------- */
.page-faq .faq-block,
.page-faq .faq-assist {
  position: relative;
  padding: clamp(40px, 6vw, 86px) 0;
}

.page-faq .faq-block--alt {
  background:
    linear-gradient(180deg, rgba(10, 37, 64, 0.95) 0%, rgba(4, 18, 31, 0.98) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-block__head,
.page-faq .faq-subhead {
  max-width: 74ch;
  margin-bottom: clamp(24px, 3.4vw, 42px);
}

.page-faq .faq-subhead {
  margin-top: clamp(44px, 6vw, 84px);
  padding-top: clamp(26px, 3.6vw, 48px);
  border-top: 1px dashed var(--line);
}

/* ---------- split feature ---------- */
.page-faq .faq-split {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  margin-bottom: clamp(26px, 3.6vw, 46px);
}

.page-faq .faq-split__text p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-split__text strong {
  color: var(--mist);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

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

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

.page-faq .qa {
  border-bottom: 1px solid var(--line);
  background: transparent;
  transition: background 0.22s var(--ease);
}

.page-faq .qa[open] {
  background: linear-gradient(180deg, rgba(18, 58, 94, 0.62) 0%, rgba(10, 37, 64, 0.18) 100%);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 20px 6px;
  cursor: pointer;
  list-style: none;
  color: var(--mist);
  font-size: clamp(15.5px, 1.2vw, 17.5px);
  line-height: 1.7;
  transition: color 0.18s var(--ease);
}

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

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
}

.page-faq .qa__q:hover {
  color: var(--cyan-soft);
}

.page-faq .qa__no {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  padding-top: 3px;
}

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

.page-faq .qa__a {
  padding: 0 6px 22px;
}

.page-faq .qa[open] .qa__a {
  animation: faq-open 0.28s var(--ease) both;
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .qa__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .qa__steps li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .qa__steps li > .mono {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 4px;
}

.page-faq .qa__a strong {
  color: var(--mist);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-faq .qa__a .mono {
  color: var(--cyan-soft);
}

.page-faq .qa__a a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 196, 138, 0.55);
}

.page-faq .qa__a a:hover {
  color: var(--orange);
}

/* ---------- assist ---------- */
.page-faq .faq-assist__panel {
  padding: clamp(26px, 4vw, 54px);
  background:
    radial-gradient(120% 100% at 100% 0%, rgba(43, 232, 208, 0.12) 0%, rgba(4, 18, 31, 0) 58%),
    linear-gradient(160deg, rgba(18, 58, 94, 0.95) 0%, rgba(10, 37, 64, 0.85) 100%);
}

.page-faq .faq-assist__head {
  max-width: 68ch;
  margin-bottom: clamp(24px, 3.4vw, 42px);
}

.page-faq .faq-assist__grid {
  display: grid;
  gap: var(--faq-gap);
  grid-template-columns: 1fr;
}

.page-faq .faq-assist__card {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(4, 18, 31, 0.5);
}

.page-faq .faq-assist__card--accent {
  border-color: rgba(255, 138, 61, 0.4);
  background: linear-gradient(165deg, rgba(255, 138, 61, 0.14) 0%, rgba(4, 18, 31, 0.62) 62%);
}

.page-faq .faq-assist__list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-assist__list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-assist__list .mono {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  padding-top: 4px;
}

.page-faq .faq-assist__hint {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-assist__cta {
  margin-top: 18px;
}

.page-faq .faq-assist__foot {
  margin: clamp(26px, 3.4vw, 40px) 0 0;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .faq-assist__foot a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 243, 228, 0.5);
}

.page-faq .faq-assist__foot a:hover {
  color: var(--cyan);
}

/* ---------- back to top ---------- */
.page-faq .faq-top {
  position: fixed;
  right: clamp(14px, 3vw, 34px);
  bottom: clamp(14px, 3vw, 34px);
  z-index: 6;
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(4, 18, 31, 0.86);
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-decoration: none;
  backdrop-filter: blur(6px);
  transition: transform 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-top:hover,
.page-faq .faq-top:focus-visible {
  transform: translateY(-2px);
  color: var(--mist);
  border-color: var(--cyan);
}

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

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: clamp(32px, 4.6vw, 64px);
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: center;
  }

  .page-faq .faq-split__fig {
    transform: translateY(6px);
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-index__item:nth-child(1) {
    grid-column: span 2;
  }

  .page-faq .faq-index__item:nth-child(1) .faq-index__link {
    flex-direction: row;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 6px 18px;
    padding: 26px 28px;
  }

  .page-faq .faq-index__item:nth-child(1) .faq-index__title {
    font-size: 26px;
  }

  .page-faq .faq-index__item:nth-child(1) .faq-index__desc {
    flex-basis: 100%;
    max-width: 46ch;
    font-size: 14.5px;
  }

  .page-faq .qa__q {
    padding: 22px 10px;
  }

  .page-faq .qa__a {
    padding: 0 10px 26px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-block__head,
  .page-faq .faq-subhead {
    padding-left: clamp(0px, 3vw, 46px);
  }

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

  .page-faq .faq-index__item:nth-child(1) {
    grid-column: span 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .faq-index__link,
  .page-faq .qa,
  .page-faq .faq-top {
    transition: none;
  }
}