.page-faq {
  --faq-rule: 1px solid var(--line-teal);
  --faq-rule-soft: 1px solid rgba(30, 74, 61, 0.62);
  --faq-gap: clamp(1.5rem, 3.4vw, 3rem);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.6rem, 4vw, 2.6rem) clamp(2rem, 5vw, 3.4rem);
  border-bottom: var(--faq-rule);
  background-image:
    linear-gradient(var(--line-teal) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-teal) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: -1px -1px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -12%;
  width: min(62vw, 580px);
  aspect-ratio: 1 / 1;
  background: linear-gradient(140deg, rgba(33, 230, 193, 0.17), rgba(33, 230, 193, 0) 58%);
  transform: rotate(16deg);
  pointer-events: none;
}

.page-faq .faq-hero .crumbs {
  position: relative;
  margin-bottom: clamp(1.2rem, 3vw, 2rem);
}

.page-faq .faq-hero__body {
  position: relative;
  display: grid;
  gap: clamp(1.6rem, 3.4vw, 2.8rem);
}

.page-faq .faq-hero__lead .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.page-faq .faq-hero__title {
  margin: 0.55rem 0 0;
  font-size: clamp(2rem, 7vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  font-weight: 800;
  max-width: 18ch;
}

.page-faq .faq-hero__lede {
  margin: 1rem 0 0;
  max-width: 62ch;
  color: var(--text-300);
}

.page-faq .faq-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.25rem;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: var(--faq-rule);
  background: var(--ink-800);
  box-shadow: 0 18px 44px rgba(4, 18, 14, 0.55);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

.page-faq .faq-hero__caption {
  padding: 0.7rem clamp(0.8rem, 2vw, 1.15rem);
  border-top: var(--faq-rule);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  padding-block: clamp(2rem, 4.5vw, 3.4rem) clamp(2.4rem, 5vw, 4rem);
}

.page-faq .faq-aside {
  align-self: start;
}

.page-faq .faq-aside__title {
  margin: 0 0 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-300);
}

.page-faq .faq-index {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--faq-rule);
}

.page-faq .faq-index__item {
  border-bottom: var(--faq-rule-soft);
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.72rem 0.2rem;
  color: var(--text-300);
  text-decoration: none;
  font-size: 0.92rem;
  line-height: 1.5;
  transition: color 0.22s var(--ease), padding-left 0.22s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan-400);
  padding-left: 0.55rem;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--orange-400);
}

.page-faq .faq-aside__note {
  margin: 1rem 0 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--text-300);
}

/* ---------- 问答区块 ---------- */

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

.page-faq .faq-block {
  padding-top: clamp(1.4rem, 3vw, 2.2rem);
  margin-top: clamp(1.4rem, 3vw, 2.2rem);
  border-top: var(--faq-rule);
}

.page-faq .faq-block:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.85rem;
  margin-bottom: 1.1rem;
}

.page-faq .faq-block__num {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: var(--orange-400);
}

.page-faq .faq-block__title {
  margin: 0;
  font-size: clamp(1.25rem, 2.8vw, 1.85rem);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.page-faq .faq-block__lede {
  flex: 1 1 100%;
  margin: 0;
  max-width: 66ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--text-300);
}

.page-faq .faq-block--signal {
  position: relative;
  padding-left: clamp(0.9rem, 2.2vw, 1.4rem);
}

.page-faq .faq-block--signal::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--orange-400), rgba(255, 122, 47, 0));
}

/* ---------- 章节配图 ---------- */

.page-faq .faq-figure {
  margin: 0 0 1.4rem;
  border: var(--faq-rule);
  background: var(--ink-800);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 5;
  object-fit: cover;
}

.page-faq .faq-figure__caption {
  padding: 0.65rem clamp(0.8rem, 2vw, 1.1rem);
  border-top: var(--faq-rule);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-300);
}

/* ---------- 折叠问答 ---------- */

.page-faq .accordion {
  border-top: var(--faq-rule);
}

.page-faq .accordion__item {
  border-bottom: var(--faq-rule);
}

.page-faq .accordion__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 1.02rem 0.15rem;
  border: 0;
  background: none;
  font: inherit;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-100);
  text-align: left;
  cursor: pointer;
  transition: color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-faq .accordion__trigger:hover,
.page-faq .accordion__trigger:focus-visible {
  color: var(--cyan-400);
}

.page-faq .accordion__trigger:focus-visible {
  outline: 1px solid var(--cyan-600);
  outline-offset: 3px;
}

.page-faq .accordion__index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
  white-space: nowrap;
}

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

.page-faq .accordion__icon {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
  color: currentColor;
}

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

.page-faq .accordion__icon::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .accordion__icon::after {
  left: 50%;
  top: 0;
  width: 1.5px;
  height: 100%;
  transform: translateX(-50%);
}

.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .accordion__panel {
  padding: 0 0.15rem 1.4rem;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-300);
}

.page-faq .accordion__panel > p {
  margin: 0 0 0.7rem;
  max-width: 66ch;
}

.page-faq .accordion__panel > p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-inline {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(33, 230, 193, 0.4);
}

.page-faq .faq-inline:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 步骤列表 ---------- */

.page-faq .faq-steps {
  margin: 0.7rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
  display: grid;
  gap: 0.5rem;
  max-width: 66ch;
}

.page-faq .faq-steps li {
  counter-increment: faq-step;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.7rem;
  align-items: start;
}

.page-faq .faq-steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
  padding-top: 0.42em;
}

/* ---------- 结尾引导 ---------- */

.page-faq .faq-outro {
  border-top: var(--faq-rule);
  background: var(--deep-teal);
}

.page-faq .faq-outro__inner {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2.2rem);
  padding-block: clamp(2rem, 4.5vw, 3.2rem);
}

.page-faq .faq-outro__title {
  margin: 0.5rem 0 0;
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.page-faq .faq-outro__body {
  margin: 0.7rem 0 0;
  max-width: 64ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-300);
}

.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
}

/* ---------- 断点 ---------- */

@media (min-width: 860px) {
  .page-faq .faq-hero__body {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
  }

  .page-faq .faq-hero__figure {
    align-self: stretch;
  }

  .page-faq .faq-hero__figure img {
    height: 100%;
    aspect-ratio: auto;
    min-height: 260px;
  }

  .page-faq .faq-block__head {
    flex-wrap: nowrap;
    align-items: baseline;
  }

  .page-faq .faq-block__lede {
    flex: 1 1 100%;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-faq .faq-block__head {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 0.85rem;
    row-gap: 0.25rem;
  }

  .page-faq .faq-block__num {
    grid-row: 1;
  }

  .page-faq .faq-block__title {
    grid-column: 2;
    grid-row: 1;
  }

  .page-faq .faq-block__lede {
    grid-column: 2;
    grid-row: 2;
  }

  .page-faq .faq-outro__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

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