.page-faq {
  --faq-gap: 1.4rem;
  --faq-line: 1px solid var(--line);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

.page-faq .faq-crumbs {
  padding-top: 1.2rem;
}

.page-faq .faq-hero {
  display: grid;
  gap: var(--faq-gap);
  margin-top: 1.4rem;
  padding: clamp(1.4rem, 4vw, 2.6rem);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(53, 230, 255, 0.14) 0%, rgba(6, 11, 20, 0) 58%),
    linear-gradient(160deg, var(--panel) 0%, var(--panel-deep) 100%);
  border: var(--faq-line);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: auto -12% -40% auto;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 177, 61, 0.16) 0%, rgba(255, 177, 61, 0) 68%);
  pointer-events: none;
}

.page-faq .faq-hero__text {
  min-width: 0;
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1 {
  margin: 0.5rem 0 0;
  font-family: var(--font-cn);
  font-size: clamp(1.9rem, 6vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-hero .lead {
  margin-top: 1rem;
  color: var(--muted);
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
  line-height: 1.75;
  max-width: 46em;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.page-faq .faq-hero__panel {
  min-width: 0;
  padding: 1.1rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(6, 11, 20, 0.55);
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__panel-label {
  margin: 0 0 0.7rem;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .layer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-faq .layer-list li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "code name dot"
    "code desc dot";
  align-items: center;
  column-gap: 0.7rem;
  padding: 0.6rem 0.7rem;
  border-radius: var(--radius-sm);
  background: rgba(13, 23, 40, 0.9);
  border-left: 2px solid var(--line);
}

.page-faq .layer-list li:nth-child(1) { border-left-color: var(--cyan); }
.page-faq .layer-list li:nth-child(2) { border-left-color: var(--amber); }
.page-faq .layer-list li:nth-child(3) { border-left-color: var(--mint); }

.page-faq .layer-list__code {
  grid-area: code;
  font-size: 0.72rem;
  color: var(--muted);
}

.page-faq .layer-list__name {
  grid-area: name;
  font-weight: 700;
  color: var(--text);
  font-size: 0.95rem;
}

.page-faq .layer-list__desc {
  grid-area: desc;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.5;
}

.page-faq .layer-list .dot {
  grid-area: dot;
}

.page-faq .faq-hero__status {
  margin: 0.9rem 0 0;
  font-size: 0.72rem;
  color: var(--amber);
  letter-spacing: 0.06em;
}

.page-faq .faq-zones {
  margin-top: clamp(2rem, 5vw, 3.2rem);
}

.page-faq .faq-zones__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-zones__head .section-title {
  margin: 0;
}

.page-faq .faq-zones__meta {
  font-size: 0.74rem;
  color: var(--amber);
  letter-spacing: 0.05em;
}

.page-faq .zone-grid {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.1rem;
}

.page-faq .zone {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num name"
    "num desc"
    "num count";
  column-gap: 0.9rem;
  row-gap: 0.25rem;
  padding: 1.1rem 1.1rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
  text-decoration: none;
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease), background 0.28s var(--ease);
}

.page-faq .zone:hover,
.page-faq .zone:focus-visible {
  transform: translateY(-3px);
  background: var(--panel-deep);
}

.page-faq .zone--cyan:hover,
.page-faq .zone--cyan:focus-visible { border-color: var(--cyan); }
.page-faq .zone--amber:hover,
.page-faq .zone--amber:focus-visible { border-color: var(--amber); }
.page-faq .zone--mint:hover,
.page-faq .zone--mint:focus-visible { border-color: var(--mint); }

.page-faq .zone__num {
  grid-area: num;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--line);
  font-weight: 700;
}

.page-faq .zone--cyan .zone__num { color: rgba(53, 230, 255, 0.5); }
.page-faq .zone--amber .zone__num { color: rgba(255, 177, 61, 0.5); }
.page-faq .zone--mint .zone__num { color: rgba(86, 240, 184, 0.5); }

.page-faq .zone__name {
  grid-area: name;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text);
}

.page-faq .zone__desc {
  grid-area: desc;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .zone__count {
  grid-area: count;
  margin-top: 0.35rem;
  font-size: 0.72rem;
  color: var(--amber);
  letter-spacing: 0.08em;
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
  margin-top: clamp(2rem, 5vw, 3rem);
}

.page-faq .faq-aside {
  min-width: 0;
  display: grid;
  gap: 0.9rem;
  align-content: start;
}

.page-faq .faq-aside .rail-title {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-aside .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.2rem;
  border-left: 1px solid var(--line);
}

.page-faq .faq-aside .rail-link {
  display: block;
  padding: 0.5rem 0.8rem;
  font-size: 0.9rem;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-faq .faq-aside .rail-link:hover,
.page-faq .faq-aside .rail-link:focus-visible {
  color: var(--text);
  background: rgba(53, 230, 255, 0.06);
}

.page-faq .faq-aside .rail-link.is-active,
.page-faq .faq-aside .rail-link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(53, 230, 255, 0.08);
}

.page-faq .aside-card {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(150deg, rgba(255, 177, 61, 0.1) 0%, rgba(13, 23, 40, 0.95) 60%);
}

.page-faq .aside-card__title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}

.page-faq .aside-card__text {
  margin: 0.45rem 0 0.8rem;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .aside-card__link {
  display: block;
  font-size: 0.82rem;
  color: var(--amber);
  text-decoration: none;
  padding: 0.18rem 0;
  word-break: break-all;
}

.page-faq .aside-card__link:hover,
.page-faq .aside-card__link:focus-visible {
  text-decoration: underline;
}

.page-faq .faq-body {
  min-width: 0;
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
}

.page-faq .faq-section {
  min-width: 0;
  scroll-margin-top: 6.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.page-faq .faq-section__head {
  margin-bottom: 1.1rem;
}

.page-faq .faq-section .section-title {
  margin: 0.35rem 0 0;
}

.page-faq .faq-section__intro {
  margin: 0.7rem 0 0;
  max-width: 52em;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-figure {
  margin: 0 0 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--panel-deep);
}

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

.page-faq .faq-figure__cap {
  display: block;
  padding: 0.6rem 0.9rem;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.page-faq .qa {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
  margin-bottom: 0.65rem;
  transition: border-color 0.26s var(--ease), background 0.26s var(--ease);
}

.page-faq .qa[open] {
  border-color: rgba(53, 230, 255, 0.55);
  background: rgba(13, 23, 40, 0.95);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1rem;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.55;
}

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

.page-faq .qa summary:hover,
.page-faq .qa summary:focus-visible {
  color: var(--cyan);
}

.page-faq .qa__mark {
  flex: 0 0 auto;
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  transition: transform 0.26s var(--ease), border-color 0.26s var(--ease);
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: opacity 0.26s var(--ease), transform 0.26s var(--ease);
}

.page-faq .qa__mark::before {
  top: 50%;
  left: 2px;
  right: 2px;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .qa__mark::after {
  left: 50%;
  top: 2px;
  bottom: 2px;
  width: 1px;
  transform: translateX(-50%);
}

.page-faq .qa[open] .qa__mark {
  border-color: var(--cyan);
}

.page-faq .qa[open] .qa__mark::after {
  opacity: 0;
  transform: translateX(-50%) rotate(90deg);
}

.page-faq .qa__body {
  padding: 0 1rem 1rem;
  border-top: 1px dashed var(--line);
  margin-top: 0.1rem;
}

.page-faq .qa__body p {
  margin: 0.85rem 0 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--muted);
  max-width: 54em;
}

.page-faq .qa__body .qa__next {
  font-size: 0.82rem;
  color: var(--text);
}

.page-faq .qa__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 230, 255, 0.35);
  word-break: break-word;
}

.page-faq .qa__body a:hover,
.page-faq .qa__body a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .env-grid {
  display: grid;
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}

.page-faq .env-card {
  padding: 1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--coral);
  border-radius: var(--radius-sm);
  background: rgba(13, 23, 40, 0.78);
}

.page-faq .env-card:nth-child(2) { border-left-color: var(--amber); }
.page-faq .env-card:nth-child(3) { border-left-color: var(--violet); }
.page-faq .env-card:nth-child(4) { border-left-color: var(--mint); }

.page-faq .env-card__name {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .env-card:nth-child(2) .env-card__name { color: var(--amber); }
.page-faq .env-card:nth-child(3) .env-card__name { color: var(--violet); }
.page-faq .env-card:nth-child(4) .env-card__name { color: var(--mint); }

.page-faq .env-card__text {
  margin: 0.5rem 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .tradeoff {
  margin-bottom: 1.2rem;
  padding: 1rem 1.1rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius-md);
  background: rgba(6, 11, 20, 0.6);
}

.page-faq .tradeoff__title {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}

.page-faq .tradeoff__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-faq .tradeoff__list li {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .tradeoff__list .dot {
  margin-top: 0.6rem;
  flex: 0 0 auto;
}

.page-faq .check-list {
  list-style: none;
  margin: 0 0 1.2rem;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-faq .check-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 0.8rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(100deg, rgba(53, 230, 255, 0.07) 0%, rgba(13, 23, 40, 0.9) 45%);
}

.page-faq .check-item__idx {
  font-size: 0.86rem;
  color: var(--cyan);
  font-weight: 700;
}

.page-faq .check-item__body {
  min-width: 0;
}

.page-faq .check-item__title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}

.page-faq .check-item__text {
  margin: 0.35rem 0 0;
  font-size: 0.85rem;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .check-item .dot {
  margin-top: 0.5rem;
}

.page-faq .faq-section--contact {
  border-top-color: rgba(255, 177, 61, 0.45);
}

.page-faq .contact-grid {
  display: grid;
  gap: 0.85rem;
}

.page-faq .contact-card {
  padding: 1rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
  display: grid;
  gap: 0.3rem;
  align-content: start;
}

.page-faq .contact-card__label {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .contact-card__value {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text);
  word-break: break-all;
}

.page-faq .contact-card__note {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .contact-card .copy-btn {
  justify-self: start;
  margin-top: 0.5rem;
}

.page-faq .contact-card--wide {
  background: linear-gradient(140deg, rgba(255, 177, 61, 0.12) 0%, var(--panel) 55%);
}

.page-faq .contact-card--wide .btn {
  justify-self: start;
  margin-top: 0.5rem;
}

.page-faq .faq-section__foot {
  margin: 1rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--line);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 640px) {
  .page-faq .zone-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-faq .contact-card--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    padding: clamp(2rem, 4vw, 3.2rem);
  }

  .page-faq .faq-hero__panel {
    padding: 1.3rem 1.2rem;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 230px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: 6.5rem;
  }

  .page-faq .qa summary {
    padding: 1.05rem 1.2rem;
    font-size: 1rem;
  }

  .page-faq .qa__body {
    padding: 0 1.2rem 1.15rem;
  }
}
</