.page-faq {
  --faq-rail-w: 15rem;
  --faq-gap: clamp(1.5rem, 4vw, 3rem);
  background: var(--k-ink);
  color: var(--k-paper);
  overflow-x: clip;
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3.2rem, 8vw, 6.5rem) 0 clamp(2.2rem, 5vw, 3.5rem);
  border-bottom: 1px solid var(--k-line);
  background: linear-gradient(180deg, #06180f 0%, var(--k-ink) 100%);
}
.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-faq .faq-hero__bg img {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: 70% 40%;
  opacity: 0.3;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(200, 255, 61, 0.13), transparent 58%),
    linear-gradient(90deg, rgba(7, 28, 22, 0.96) 26%, rgba(7, 28, 22, 0.55) 100%);
  pointer-events: none;
}
.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
}
.page-faq .k-crumbs {
  margin-bottom: clamp(1.4rem, 3vw, 2.2rem);
}
.page-faq .faq-hero h1 {
  margin: 0.35em 0 0;
  font-family: var(--k-sans);
  font-size: clamp(3rem, 11vw, 7rem);
  line-height: 0.92;
  letter-spacing: -0.045em;
  font-weight: 800;
  color: var(--k-paper);
}
.page-faq .faq-hero__lead {
  max-width: 54rem;
  margin: clamp(1.1rem, 2.5vw, 1.8rem) 0 0;
  font-size: clamp(0.98rem, 1.5vw, 1.1rem);
  line-height: 1.85;
  color: var(--k-mist);
}
.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: clamp(1.6rem, 3.5vw, 2.6rem) 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-hero__jump .k-tag {
  text-decoration: none;
  transition: color 0.2s var(--k-ease), border-color 0.2s var(--k-ease), background-color 0.2s var(--k-ease);
}
.page-faq .faq-hero__jump .k-tag:hover,
.page-faq .faq-hero__jump .k-tag:focus-visible {
  color: var(--k-ink);
  background: var(--k-lime);
  border-color: var(--k-lime);
}

/* ===== 双栏骨架 ===== */
.page-faq .faq-body {
  padding: clamp(2.4rem, 6vw, 4.5rem) 0 clamp(3rem, 7vw, 5.5rem);
}
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}
.page-faq .faq-rail {
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--k-line);
}
.page-faq .faq-rail__title {
  margin: 0 0 0.9rem;
  font-family: var(--k-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--k-lime);
}
.page-faq .faq-rail__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}
.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.62rem 0;
  color: var(--k-mist);
  text-decoration: none;
  border-top: 1px solid rgba(49, 82, 69, 0.65);
  transition: color 0.2s var(--k-ease);
}
.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--k-lime);
}
.page-faq .faq-rail__num {
  font-family: var(--k-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--k-line);
}
.page-faq .faq-rail__list a:hover .faq-rail__num,
.page-faq .faq-rail__list a:focus-visible .faq-rail__num {
  color: var(--k-amber);
}
.page-faq .faq-rail__label {
  font-size: 0.92rem;
  line-height: 1.4;
}
.page-faq .faq-rail__note {
  margin: 1rem 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: rgba(168, 192, 177, 0.75);
}

/* ===== 问答块 ===== */
.page-faq .faq-main {
  min-width: 0;
}
.page-faq .faq-block {
  position: relative;
  padding-left: clamp(0.9rem, 2.5vw, 1.9rem);
  border-left: 1px solid var(--k-line);
  margin-bottom: clamp(2.4rem, 5vw, 4rem);
  counter-reset: faqitem;
}
.page-faq .faq-block:last-child {
  margin-bottom: 0;
}
.page-faq .faq-block::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  width: 1px;
  height: 2.6rem;
  background: var(--k-lime);
}
.page-faq .faq-block__head {
  margin-bottom: clamp(1.1rem, 2.5vw, 1.6rem);
}
.page-faq .faq-block__head h2 {
  margin: 0.5rem 0 0;
  font-family: var(--k-sans);
  font-size: clamp(1.5rem, 3.6vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.035em;
  font-weight: 800;
  color: var(--k-paper);
}
.page-faq .faq-block__head p {
  margin: 0.6rem 0 0;
  max-width: 40rem;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--k-mist);
}
.page-faq .faq-block__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.6rem;
}

/* 问题条目 */
.page-faq .faq-item {
  counter-increment: faqitem;
  border-top: 1px solid rgba(49, 82, 69, 0.7);
  background: transparent;
}
.page-faq .faq-item:last-of-type {
  border-bottom: 1px solid rgba(49, 82, 69, 0.7);
}
.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1.05rem 0;
  cursor: pointer;
  list-style: none;
  transition: color 0.2s var(--k-ease);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary:hover .faq-item__q,
.page-faq .faq-item summary:focus-visible .faq-item__q {
  color: var(--k-lime);
}
.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--k-lime);
  outline-offset: 3px;
}
.page-faq .faq-item__num {
  flex: none;
  padding-top: 0.3em;
  font-family: var(--k-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--k-line);
}
.page-faq .faq-item__num::before {
  content: counter(faqitem, decimal-leading-zero);
}
.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 1rem;
  line-height: 1.6;
  font-weight: 600;
  color: var(--k-paper);
  transition: color 0.2s var(--k-ease);
}
.page-faq .faq-item__icon {
  position: relative;
  flex: none;
  width: 1rem;
  height: 1rem;
  margin-top: 0.35rem;
}
.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 100%;
  height: 1px;
  background: var(--k-lime);
  transition: transform 0.25s var(--k-ease), opacity 0.25s var(--k-ease);
}
.page-faq .faq-item__icon::after {
  transform: rotate(90deg);
}
.page-faq .faq-item[open] .faq-item__icon::after {
  transform: rotate(90deg) scaleX(0);
  opacity: 0;
}
.page-faq .faq-item__body {
  padding: 0 0 1.2rem 1.55rem;
}
.page-faq .faq-item__body p {
  margin: 0;
  max-width: 46rem;
  font-size: 0.94rem;
  line-height: 1.9;
  color: var(--k-mist);
}
.page-faq .faq-item__body strong {
  color: var(--k-paper);
  font-weight: 600;
}
.page-faq .faq-item__body a {
  color: var(--k-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, 0.45);
}
.page-faq .faq-item__body a:hover,
.page-faq .faq-item__body a:focus-visible {
  border-bottom-color: var(--k-lime);
}

/* 入口区配图 */
.page-faq .faq-figure {
  margin: 0;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--k-radius);
  border: 1px solid var(--k-line);
  background: var(--k-panel);
}
.page-faq .faq-figure figcaption {
  margin-top: 0.6rem;
  font-family: var(--k-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: rgba(168, 192, 177, 0.8);
}

/* ===== 底部引导 ===== */
.page-faq .faq-cta {
  position: relative;
  background: linear-gradient(135deg, var(--k-wine) 0%, #2c1220 62%, var(--k-indigo) 100%);
  border-top: 1px solid var(--k-line);
}
.page-faq .faq-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.6rem;
  padding: clamp(2.2rem, 5vw, 3.6rem) 0;
}
.page-faq .faq-cta__text h2 {
  margin: 0.55rem 0 0;
  font-family: var(--k-sans);
  font-size: clamp(1.4rem, 3.4vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -0.035em;
  font-weight: 800;
  color: var(--k-paper);
}
.page-faq .faq-cta__text p:not(.k-label) {
  margin: 0.7rem 0 0;
  max-width: 42rem;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(243, 247, 234, 0.82);
}
.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: flex-start;
}

/* ===== 桌面布局 ===== */
@media (min-width: 60rem) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
  }
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--k-header-h) + 1.6rem);
    align-self: start;
    padding-bottom: 0;
    border-bottom: 0;
  }
  .page-faq .faq-rail__list {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 2.5rem;
  }
  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
}
@media (min-width: 64rem) {
  .page-faq .faq-block__grid--figure {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.58fr);
    align-items: start;
    gap: 2rem;
  }
  .page-faq .faq-block__grid--figure .faq-figure {
    margin-top: 0.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after,
  .page-faq .faq-item__q,
  .page-faq .faq-rail__list a {
    transition: none;
  }
}