.page-faq {
  --faq-cut: 16px;
  position: relative;
  padding-bottom: clamp(64px, 9vw, 132px);
  background:
    radial-gradient(900px 420px at 88% -6%, rgba(242, 180, 65, 0.1), transparent 62%),
    radial-gradient(760px 480px at -8% 28%, rgba(107, 255, 158, 0.065), transparent 64%);
}

/* ---------- breadcrumb ---------- */
.page-faq .breadcrumb {
  padding-top: clamp(20px, 3vw, 36px);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--dim);
}
.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--green);
}
.page-faq .breadcrumb span[aria-current="page"] {
  color: var(--text);
}

/* ---------- hero ---------- */
.page-faq .faq-hero {
  max-width: 1020px;
  padding: clamp(22px, 3vw, 42px) 0 clamp(24px, 3.4vw, 48px);
  display: grid;
  gap: clamp(16px, 2.2vw, 26px);
}
.page-faq .faq-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0;
}
.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 7vw, 78px);
  line-height: 0.98;
  letter-spacing: 0.015em;
  color: var(--text);
}
.page-faq .faq-hero h1::after {
  content: "";
  display: block;
  width: 64px;
  height: 3px;
  margin-top: clamp(14px, 2vw, 22px);
  background: linear-gradient(90deg, var(--red), var(--amber));
}
.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- two-step route map ---------- */
.page-faq .route-map {
  list-style: none;
  margin: clamp(6px, 1vw, 14px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 1.6vw, 18px);
}
.page-faq .route-node {
  position: relative;
  display: grid;
  gap: 8px;
  padding: clamp(18px, 2.2vw, 26px) clamp(18px, 2.2vw, 26px) clamp(18px, 2.2vw, 26px) clamp(24px, 2.8vw, 34px);
  background: linear-gradient(155deg, rgba(22, 48, 76, 0.92), rgba(15, 32, 54, 0.72));
  border: 1px solid var(--line-soft);
  clip-path: polygon(
    0 0,
    calc(100% - var(--faq-cut)) 0,
    100% var(--faq-cut),
    100% 100%,
    var(--faq-cut) 100%,
    0 calc(100% - var(--faq-cut))
  );
}
.page-faq .route-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--red);
}
.page-faq .route-node__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--amber);
}
.page-faq .route-node__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.25;
  letter-spacing: 0.02em;
  color: var(--text);
}
.page-faq .route-node__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}
.page-faq .faq-hero .note {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.05em;
  line-height: 1.7;
  color: var(--dim);
}

/* ---------- pulse rail ---------- */
.page-faq .faq-pulse {
  margin-top: clamp(4px, 1vw, 12px);
  height: 32px;
}
.page-faq .faq-pulse svg {
  display: block;
  width: 100%;
  height: 32px;
  overflow: visible;
}
.page-faq .faq-pulse__base {
  fill: none;
  stroke: var(--line);
  stroke-width: 1.2;
  vector-effect: non-scaling-stroke;
}
.page-faq .faq-pulse__peak {
  fill: var(--green);
  filter: drop-shadow(0 0 7px rgba(107, 255, 158, 0.85));
}

/* ---------- shell ---------- */
.page-faq .guide-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 48px);
  margin-top: clamp(20px, 3vw, 40px);
  padding-top: clamp(24px, 3.4vw, 48px);
  border-top: 1px solid var(--line-soft);
}

/* ---------- left index ---------- */
.page-faq .guide-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--dim);
}
.page-faq .guide-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}
.page-faq .guide-index__link {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 8px 10px 8px 20px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.22s var(--ease), background 0.22s var(--ease);
}
.page-faq .guide-index__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 10px;
  height: 1px;
  background: var(--line);
  transition: width 0.24s var(--ease), background 0.24s var(--ease), box-shadow 0.24s var(--ease);
}
.page-faq .guide-index__link:hover,
.page-faq .guide-index__link:focus-visible {
  color: var(--text);
  background: rgba(22, 48, 76, 0.62);
  outline: none;
}
.page-faq .guide-index__link:hover::before,
.page-faq .guide-index__link:focus-visible::before {
  width: 16px;
  background: var(--green);
  box-shadow: 0 0 10px rgba(107, 255, 158, 0.6);
}
.page-faq .guide-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

/* ---------- accordion group ---------- */
.page-faq .guide-body {
  display: grid;
  gap: clamp(10px, 1.6vw, 16px);
  min-width: 0;
}
.page-faq .guide-item {
  position: relative;
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(22, 48, 76, 0.5), rgba(15, 32, 54, 0.72));
  clip-path: polygon(
    0 0,
    calc(100% - 14px) 0,
    100% 14px,
    100% 100%,
    14px 100%,
    0 calc(100% - 14px)
  );
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease);
}
.page-faq .guide-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--line);
  transition: background 0.24s var(--ease), box-shadow 0.24s var(--ease);
}
.page-faq .guide-item:hover {
  border-color: rgba(107, 255, 158, 0.32);
}
.page-faq .guide-item:has(.accordion__trigger[aria-expanded="true"]) {
  border-color: rgba(107, 255, 158, 0.42);
  background: linear-gradient(180deg, rgba(31, 92, 58, 0.24), rgba(15, 32, 54, 0.82));
}
.page-faq .guide-item:has(.accordion__trigger[aria-expanded="true"])::before {
  background: var(--green);
  box-shadow: 0 0 14px rgba(107, 255, 158, 0.5);
}
.page-faq .guide-item__heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}
.page-faq .accordion__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(10px, 1.6vw, 18px);
  width: 100%;
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.2vw, 26px) clamp(16px, 2.2vw, 22px) clamp(18px, 2.4vw, 28px);
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(17px, 2.1vw, 22px);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.02em;
}
.page-faq .accordion__trigger:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--green);
}
.page-faq .guide-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--amber);
}
.page-faq .accordion__icon {
  color: var(--green);
  transition: color 0.22s var(--ease);
}
.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon {
  color: var(--red);
}
.page-faq .accordion__panel-inner {
  max-width: 72ch;
  padding: 0 clamp(18px, 2.4vw, 28px) clamp(20px, 2.6vw, 30px) clamp(18px, 2.4vw, 28px);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}
.page-faq .accordion__panel-inner::before {
  content: "";
  display: block;
  height: 1px;
  margin-bottom: clamp(14px, 1.8vw, 20px);
  background: linear-gradient(90deg, var(--green), rgba(42, 74, 107, 0.15));
}
.page-faq .accordion__panel-inner p {
  margin: 0 0 10px;
}
.page-faq .accordion__panel-inner p:last-child {
  margin-bottom: 0;
}
.page-faq .accordion__panel-inner a {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- figures ---------- */
.page-faq .faq-figure {
  margin: clamp(14px, 2vw, 22px) 0 4px;
  border: 1px solid var(--line-soft);
  background: linear-gradient(150deg, var(--ink-700), var(--ink-900));
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-figure figcaption {
  padding: 10px 14px 12px;
  font-family: var(--font-body);
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--dim);
  border-top: 1px solid var(--line-soft);
}
.page-faq .faq-figure--wide {
  max-width: 640px;
}
.page-faq .faq-figure--tall {
  max-width: 360px;
}

/* ---------- term glossary ---------- */
.page-faq .term-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-faq .term-list > div {
  padding-left: 14px;
  border-left: 2px solid var(--line);
}
.page-faq .term-list dt {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--amber);
}
.page-faq .term-list dd {
  margin: 5px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- foot callout ---------- */
.page-faq .faq-foot {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  margin-top: clamp(36px, 5vw, 68px);
  padding: clamp(24px, 3.4vw, 44px) clamp(20px, 3vw, 42px);
  background: linear-gradient(120deg, rgba(122, 31, 26, 0.3), rgba(15, 32, 54, 0.92) 58%);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}
.page-faq .faq-foot h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--text);
}
.page-faq .faq-foot p {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--muted);
}
.page-faq .faq-foot__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- breakpoints ---------- */
@media (min-width: 760px) {
  .page-faq .route-map {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(18px, 2.4vw, 34px);
  }
}

@media (min-width: 720px) {
  .page-faq .term-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 30px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-foot {
    grid-template-columns: minmax(0, 1.4fr) auto;
    align-items: center;
  }
}

@media (min-width: 980px) {
  .page-faq .guide-shell {
    grid-template-columns: 236px minmax(0, 1fr);
  }
  .page-faq .guide-index {
    position: sticky;
    top: 116px;
    align-self: start;
  }
}

@media (max-width: 560px) {
  .page-faq .accordion__trigger {
    grid-template-columns: auto minmax(0, 1fr);
    row-gap: 6px;
  }
  .page-faq .accordion__icon {
    grid-column: 2;
    justify-self: start;
  }
  .page-faq .faq-figure--wide,
  .page-faq .faq-figure--tall {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .guide-index__link,
  .page-faq .guide-index__link::before,
  .page-faq .guide-item,
  .page-faq .guide-item::before,
  .page-faq .accordion__icon,
  .page-faq .faq-pulse__peak {
    transition: none;
  }
}