.page-faq {
  --faq-panel: rgba(15, 31, 58, .62);
  --faq-panel-deep: rgba(10, 21, 38, .82);
  --faq-line: var(--steel);
  --faq-gap: clamp(1rem, 2.4vw, 1.75rem);
  background: var(--ink-900);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 6vw, 4.5rem) 0 clamp(2.25rem, 6vw, 4rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -12% auto -12%;
  height: 150%;
  pointer-events: none;
  background:
    radial-gradient(58% 52% at 79% 10%, rgba(53, 240, 138, .17), transparent 62%),
    radial-gradient(46% 46% at 8% 82%, rgba(255, 122, 47, .13), transparent 66%),
    linear-gradient(116deg, transparent 40%, rgba(53, 240, 138, .075) 50%, transparent 60%);
}

.page-faq .faq-hero > .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 1.1rem 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.4vw, 4.3rem);
  line-height: 1.1;
  letter-spacing: -.012em;
}

.page-faq .faq-hero__title em {
  display: block;
  font-style: normal;
  color: var(--neon);
  text-shadow: 0 0 34px rgba(53, 240, 138, .32);
}

.page-faq .faq-hero__lede {
  margin-top: 1.3rem;
  max-width: 62ch;
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin: 1.85rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__stats li {
  padding: .5rem 1.05rem;
  border: 1px solid var(--steel);
  border-radius: var(--radius-pill);
  background: var(--faq-panel-deep);
  color: var(--muted);
  font-size: .8125rem;
  letter-spacing: .01em;
}

.page-faq .faq-hero__stats .mono {
  color: var(--neon);
  font-weight: 700;
}

/* ---------- 章节号 ---------- */

.page-faq .section__index {
  color: var(--neon);
}

/* ---------- 三步走 ---------- */

.page-faq .faq-start__body {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.25rem);
  margin-top: clamp(1.25rem, 3vw, 1.9rem);
}

.page-faq .faq-steps {
  display: grid;
  gap: .85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 0 1rem;
  padding: 1.15rem 1.2rem 1.2rem;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(15, 31, 58, .86), rgba(10, 21, 38, .55));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 1.15rem;
  bottom: 1.15rem;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--neon);
  opacity: .5;
}

.page-faq .faq-step:hover {
  transform: translateY(-3px);
  border-color: rgba(53, 240, 138, .5);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--neon);
  padding-top: .2rem;
}

.page-faq .faq-step__title {
  margin: 0 0 .5rem;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .faq-step__text {
  margin: 0 0 .8rem;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.8;
}

.page-faq .faq-step__link {
  display: inline-block;
  color: var(--orange);
  font-size: .875rem;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-step__link::after {
  content: " →";
  font-family: var(--font-mono);
}

.page-faq .faq-step__link:hover,
.page-faq .faq-step__link:focus-visible {
  border-bottom-color: var(--orange);
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-800);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: .8rem 1.1rem;
  border-top: 1px solid var(--faq-line);
  color: var(--muted);
  font-size: .78rem;
  letter-spacing: .02em;
}

/* ---------- 问答区布局 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: 1.25rem;
  margin-top: clamp(1.25rem, 3vw, 1.9rem);
}

.page-faq .faq-toc__title {
  margin: 0 0 .75rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}

.page-faq .faq-toc__btn {
  position: relative;
  display: block;
  flex: 0 1 auto;
  padding: .5rem 1rem;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-pill);
  background: var(--faq-panel);
  color: var(--muted);
  font: inherit;
  font-size: .875rem;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  appearance: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-toc__btn:hover {
  color: var(--paper);
  border-color: rgba(53, 240, 138, .55);
}

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

.page-faq .faq-toc__btn[aria-pressed="true"] {
  color: var(--paper);
  font-weight: 600;
  background: var(--neon-soft);
  border-color: var(--neon);
}

.page-faq .faq-toc__btn[aria-pressed="true"]::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 50%;
  width: 3px;
  height: 58%;
  border-radius: 0 3px 3px 0;
  transform: translateY(-50%);
  background: var(--neon);
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  display: grid;
  gap: clamp(1.5rem, 3.2vw, 2.4rem);
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  margin: 0 0 .75rem;
  padding-bottom: .55rem;
  border-bottom: 1px solid var(--faq-line);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-faq .faq-group__title .mono {
  color: var(--neon);
  font-size: .85rem;
  font-weight: 700;
}

.page-faq .faq__item {
  position: relative;
  margin: 0 0 .55rem;
  padding: 0 1.1rem;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-sm);
  background: var(--faq-panel);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq__item:hover {
  border-color: rgba(53, 240, 138, .42);
}

.page-faq .faq__item[open] {
  background: var(--faq-panel-deep);
  border-color: rgba(53, 240, 138, .42);
}

.page-faq .faq__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .95rem;
  bottom: .95rem;
  width: 2px;
  border-radius: 0 2px 2px 0;
  background: var(--neon);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.page-faq .faq__item[open]::before {
  opacity: 1;
}

.page-faq .faq__q {
  display: flex;
  align-items: flex-start;
  gap: .8rem;
  padding: 1rem 2rem 1rem 0;
  position: relative;
  cursor: pointer;
  list-style: none;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

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

.page-faq .faq__q::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--orange);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq__item[open] .faq__q::after {
  content: "−";
  color: var(--neon);
}

.page-faq .faq__q:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

.page-faq .faq__num {
  flex: none;
  min-width: 1.7rem;
  padding-top: .28rem;
  color: var(--neon);
  font-size: .78rem;
  font-weight: 700;
}

.page-faq .faq__qt {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq__a {
  padding: 0 0 1.15rem 2.5rem;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.85;
}

.page-faq .faq__a p {
  margin: 0 0 .65rem;
}

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

.page-faq .faq__a a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq__a ol {
  counter-reset: faqstep;
  list-style: none;
  margin: 0 0 .65rem;
  padding: 0;
  display: grid;
  gap: .4rem;
}

.page-faq .faq__a ol:last-child {
  margin-bottom: 0;
}

.page-faq .faq__a li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 1.75rem minmax(0, 1fr);
  gap: .5rem;
  align-items: baseline;
}

.page-faq .faq__a li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .78rem;
  letter-spacing: .02em;
  color: var(--neon);
}

/* ---------- 联系 ---------- */

.page-faq .faq-contact__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.25rem);
  padding: clamp(1.25rem, 3.4vw, 2.4rem);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(70% 90% at 88% 0%, rgba(255, 122, 47, .14), transparent 62%),
    linear-gradient(180deg, rgba(15, 31, 58, .9), rgba(10, 21, 38, .7));
}

.page-faq .faq-contact__title {
  margin: .65rem 0 .8rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.005em;
}

.page-faq .faq-contact__text {
  margin: 0 0 1.4rem;
  max-width: 54ch;
  color: var(--muted);
  font-size: .98rem;
  line-height: 1.85;
}

.page-faq .faq-contact__list {
  display: grid;
  gap: .55rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .5rem 1rem;
  padding: .7rem 0;
  border-bottom: 1px solid rgba(22, 41, 74, .8);
}

.page-faq .faq-contact__key {
  flex: none;
  min-width: 5rem;
  color: var(--muted);
  font-size: .8125rem;
  letter-spacing: .08em;
}

.page-faq .faq-contact__val {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .6rem;
  min-width: 0;
  color: var(--paper);
  font-size: .95rem;
  word-break: break-word;
}

.page-faq .faq-contact__val .mono {
  color: var(--neon);
  font-weight: 700;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

.page-faq .faq-contact__media {
  margin: 0;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--ink-800);
}

.page-faq .faq-contact__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-contact__media figcaption {
  padding: .75rem 1rem;
  border-top: 1px solid var(--faq-line);
  color: var(--muted);
  font-size: .78rem;
  letter-spacing: .02em;
}

/* ---------- 回到顶部 ---------- */

.page-faq .faq-gotop {
  position: fixed;
  right: 1rem;
  bottom: calc(var(--mobile-bar-h) + 1rem);
  z-index: 40;
  padding: .55rem .95rem;
  border: 1px solid var(--steel);
  border-radius: var(--radius-pill);
  background: rgba(5, 11, 22, .92);
  color: var(--muted);
  font-size: .78rem;
  letter-spacing: .06em;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-gotop:hover,
.page-faq .faq-gotop:focus-visible {
  color: var(--neon);
  border-color: var(--neon);
}

/* ---------- 断点 ---------- */

@media (min-width: 700px) {
  .page-faq .faq__a {
    max-width: 68ch;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-start__body {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: start;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 2.75rem;
    align-items: start;
  }

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

  .page-faq .faq-toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-faq .faq-toc__btn {
    border-radius: var(--radius-pill);
  }

  .page-faq .faq-gotop {
    right: 1.75rem;
    bottom: 1.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq__item,
  .page-faq .faq-toc__btn,
  .page-faq .faq-gotop {
    transition: none;
  }

  .page-faq .faq-step:hover {
    transform: none;
  }
}