/* ===== 知识中心 / 技能树式问答 ===== */
.page-faq {
  --faq-panel: rgba(12, 10, 20, .82);
  --faq-rail: rgba(0, 229, 255, .28);
  position: relative;
  background: var(--hx-ink);
  color: var(--hx-text);
}

/* --- 首屏 --- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2.6rem, 8vw, 5.2rem) 0 clamp(2rem, 5vw, 3.2rem);
  background:
    radial-gradient(circle at 82% 8%, rgba(91, 59, 255, .34), transparent 56%),
    radial-gradient(circle at 6% 92%, rgba(0, 229, 255, .13), transparent 52%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--hx-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--hx-grid) 1px, transparent 1px);
  background-size: 88px 88px;
  pointer-events: none;
}

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

.page-faq .faq-hero .hx-breadcrumb {
  margin-bottom: clamp(1.6rem, 4vw, 2.4rem);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.8rem, 4vw, 3rem);
  align-items: end;
}

.page-faq .faq-hero__text .hx-lead {
  margin-top: 1.1rem;
  max-width: 46ch;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--hx-line);
  border-radius: var(--hx-r);
  overflow: hidden;
  background: var(--faq-panel);
  box-shadow: var(--hx-shadow);
}

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, .82fr);
    gap: clamp(2rem, 4.5vw, 3.6rem);
  }
}

/* --- 节点索引条 --- */
.page-faq .faq-steps {
  margin-top: clamp(2rem, 5vw, 3.2rem);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--hx-line-soft);
  border-radius: var(--hx-r);
  background: var(--hx-line-soft);
  overflow: hidden;
}

.page-faq .faq-step {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  padding: 1rem .9rem 1.15rem;
  background: var(--faq-panel);
  text-decoration: none;
  transition: background .25s var(--hx-ease), transform .25s var(--hx-ease);
}

.page-faq .faq-step:hover,
.page-faq .faq-step:focus-visible {
  background: rgba(42, 27, 107, .78);
  transform: translateY(-2px);
}

.page-faq .faq-step__idx {
  font-family: var(--hx-font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--hx-cyan);
}

.page-faq .faq-step__label {
  font-size: .98rem;
  line-height: 1.4;
  color: var(--hx-bright);
}

.page-faq .faq-step__hint {
  font-size: .78rem;
  line-height: 1.55;
  color: var(--hx-text-dim);
}

@media (min-width: 720px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

/* --- 问答主体 --- */
.page-faq .faq-body {
  padding: clamp(1.4rem, 4vw, 2.4rem) 0 clamp(2.6rem, 6vw, 4.6rem);
}

.page-faq .faq-block {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
  padding: clamp(2.2rem, 5vw, 3.4rem) 0;
  border-top: 1px solid var(--hx-line-soft);
  scroll-margin-top: calc(var(--hx-header-h) + 1.5rem);
}

.page-faq .faq-block:first-child {
  border-top-color: var(--hx-line);
}

@media (min-width: 960px) {
  .page-faq .faq-block {
    grid-template-columns: minmax(0, 216px) minmax(0, 1fr);
    gap: clamp(1.8rem, 4vw, 3.4rem);
  }
}

.page-faq .faq-block__aside {
  display: flex;
  align-items: baseline;
  gap: .8rem;
  min-width: 0;
}

.page-faq .faq-block__idx {
  font-family: var(--hx-font-cond);
  font-size: clamp(1.9rem, 4.6vw, 2.9rem);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--hx-violet);
}

.page-faq .faq-block__title {
  margin: 0;
  font-size: clamp(1.12rem, 1.6vw + .7rem, 1.5rem);
  font-weight: 400;
  letter-spacing: .02em;
  color: var(--hx-bright);
}

.page-faq .faq-block__note {
  display: none;
  margin: .7rem 0 0;
  font-family: var(--hx-font-mono);
  font-size: .76rem;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--hx-text-dim);
}

@media (min-width: 960px) {
  .page-faq .faq-block__aside {
    display: block;
    position: sticky;
    top: calc(var(--hx-header-h) + 2rem);
    align-self: start;
  }

  .page-faq .faq-block__title {
    margin-top: .5rem;
  }

  .page-faq .faq-block__note {
    display: block;
    padding-left: .9rem;
    border-left: 1px solid var(--faq-rail);
  }
}

/* --- 图片 --- */
.page-faq .faq-media {
  margin: 0 0 1.5rem;
  border: 1px solid var(--hx-line-soft);
  border-radius: var(--hx-r);
  overflow: hidden;
  background: var(--faq-panel);
}

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

/* --- 折叠问答 --- */
.page-faq .faq-list {
  display: grid;
  gap: .1rem;
  min-width: 0;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--hx-line-soft);
  transition: border-color .25s var(--hx-ease);
}

.page-faq .faq-item[open] {
  border-bottom-color: var(--hx-line);
}

.page-faq .faq-item > summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 1.05rem 2.4rem 1.05rem 1.6rem;
  font-size: clamp(.98rem, .35vw + .9rem, 1.08rem);
  line-height: 1.6;
  color: var(--hx-bright);
  transition: color .2s var(--hx-ease);
}

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

.page-faq .faq-item > summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.42rem;
  width: 9px;
  height: 9px;
  border: 1px solid var(--hx-cyan);
  transform: rotate(45deg);
  transition: background .2s var(--hx-ease);
}

.page-faq .faq-item[open] > summary::before {
  background: var(--hx-cyan);
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: .35rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--hx-font-mono);
  font-size: 1rem;
  color: var(--hx-cyan);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
}

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

.page-faq .faq-answer {
  padding: .1rem 2.2rem 1.5rem 1.85rem;
  max-width: 66ch;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--hx-text);
}

.page-faq .faq-answer p {
  margin: 0 0 .8em;
}

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

.page-faq .faq-answer a {
  color: var(--hx-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .38);
}

.page-faq .faq-answer a:hover {
  border-bottom-color: var(--hx-cyan);
}

.page-faq .faq-answer .k {
  font-family: var(--hx-font-mono);
  font-size: .88em;
  letter-spacing: .01em;
  color: var(--hx-lime);
}

.page-faq .faq-answer .hx-copy {
  margin-left: .6rem;
  vertical-align: middle;
}

/* --- 结尾引导 --- */
.page-faq .faq-cta {
  margin-top: clamp(1.8rem, 4vw, 2.8rem);
  display: grid;
  gap: 1.2rem;
  padding: clamp(1.5rem, 4vw, 2.3rem);
  border: 1px solid var(--hx-line);
  border-radius: var(--hx-r);
  background:
    linear-gradient(118deg, rgba(91, 59, 255, .32), rgba(0, 229, 255, .09) 62%, transparent);
}

.page-faq .faq-cta__title {
  margin: 0 0 .55rem;
  font-size: clamp(1.15rem, 1.6vw + .8rem, 1.55rem);
  font-weight: 400;
  color: var(--hx-bright);
}

.page-faq .faq-cta__desc {
  margin: 0;
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--hx-text);
}

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

@media (min-width: 860px) {
  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1.25fr) auto;
    align-items: center;
    gap: clamp(1.4rem, 4vw, 2.6rem);
  }
}

/* --- 动效偏好 --- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-item,
  .page-faq .faq-item > summary,
  .page-faq .faq-item > summary::before {
    transition: none;
  }

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