.page-faq {
  --faq-sticky-top: 96px;
  --faq-accent: var(--c-cyan);
  display: block;
}

/* ---------- Hero ---------- */
.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.94fr);
  }
}

.page-faq .faq-hero__copy .lede {
  margin-top: 18px;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 1200 / 760;
  background:
    radial-gradient(120% 110% at 18% 0%, rgba(33, 230, 193, 0.2), transparent 58%),
    radial-gradient(100% 100% at 100% 100%, rgba(255, 138, 61, 0.14), transparent 55%),
    var(--c-panel-2);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(5, 15, 27, 0.72));
  pointer-events: none;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 数字条 ---------- */
.page-faq .faq-facts__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--c-line);
}

@media (min-width: 780px) {
  .page-faq .faq-facts__row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-faq .faq-fact {
  padding: clamp(16px, 2.4vw, 26px);
  background: var(--c-panel-2);
}

.page-faq .faq-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-cyan);
  letter-spacing: -0.02em;
}

.page-faq .faq-fact__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-muted);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

@media (min-width: 1024px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 272px minmax(0, 1fr);
  }
}

/* ---------- 左侧吸附目录 ---------- */
.page-faq .faq-rail {
  display: grid;
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(11, 34, 57, 0.92), rgba(7, 22, 38, 0.92));
}

@media (min-width: 1024px) {
  .page-faq .faq-rail {
    position: sticky;
    top: var(--faq-sticky-top);
  }
}

.page-faq .faq-rail__nav {
  display: grid;
  gap: 4px;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 10px;
  color: var(--c-muted);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .faq-rail__link:hover {
  background: rgba(33, 230, 193, 0.1);
  color: var(--c-text);
}

.page-faq .faq-rail__link:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-faq .faq-rail__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-cyan);
}

@media (max-width: 1023px) {
  .page-faq .faq-rail__nav {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

  .page-faq .faq-rail__nav::-webkit-scrollbar {
    display: none;
  }

  .page-faq .faq-rail__link {
    flex: 0 0 auto;
    white-space: nowrap;
    border: 1px solid var(--c-line);
  }
}

/* ---------- 筛选 ---------- */
.page-faq .filter-bar {
  display: grid;
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-filter__btns {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .filter {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  background: transparent;
  color: var(--c-muted);
  cursor: pointer;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .filter:hover {
  border-color: var(--c-cyan);
  color: var(--c-text);
}

.page-faq .filter:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-faq .filter.is-active,
.page-faq .filter[aria-pressed="true"] {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: #04141b;
  font-weight: 600;
}

.page-faq .filter__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-muted);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: clamp(48px, 7vw, 88px);
}

.page-faq .faq-group {
  scroll-margin-top: 112px;
}

.page-faq .faq-group__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: 20px;
}

.page-faq .faq-group__icon {
  flex: 0 0 38px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  border: 1px solid var(--c-line);
  background: rgba(33, 230, 193, 0.08);
  color: var(--faq-accent);
}

.page-faq .faq-group__icon svg {
  width: 20px;
  height: 20px;
}

.page-faq .faq-group__title {
  margin: 2px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3vw, 29px);
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--c-text);
}

.page-faq .faq-group__sub {
  margin: 8px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-faq .faq-group--terminal { --faq-accent: var(--c-orange); }
.page-faq .faq-group--version { --faq-accent: var(--c-violet); }
.page-faq .faq-group--region { --faq-accent: var(--c-cyan-dark); }
.page-faq .faq-group--support { --faq-accent: var(--c-orange-soft); }

.page-faq .faq-group--terminal .faq-group__icon {
  background: rgba(255, 138, 61, 0.1);
}

.page-faq .faq-group--version .faq-group__icon {
  background: rgba(167, 139, 250, 0.12);
}

.page-faq .faq-group--region .faq-group__icon {
  background: rgba(14, 158, 140, 0.14);
}

.page-faq .faq-group--support .faq-group__icon {
  background: rgba(255, 196, 107, 0.12);
}

/* ---------- 可展开问题卡 ---------- */
.page-faq .qa {
  margin-top: 12px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--faq-accent);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(11, 34, 57, 0.86), rgba(7, 22, 38, 0.86));
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--c-line);
  border-left-color: var(--faq-accent);
}

.page-faq .qa[open] {
  background: linear-gradient(180deg, rgba(16, 46, 74, 0.94), rgba(7, 22, 38, 0.94));
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.5;
  color: var(--c-text);
  transition: color 0.25s var(--ease);
}

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

.page-faq .qa__q:hover {
  color: var(--faq-accent);
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: -2px;
  border-radius: var(--r-md);
}

.page-faq .qa__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  line-height: 2.1;
  color: var(--faq-accent);
  flex: 0 0 auto;
}

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

.page-faq .qa__icon {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 6px;
  margin-left: auto;
}

.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--faq-accent);
  border-radius: 2px;
}

.page-faq .qa__icon::before {
  width: 14px;
  height: 2px;
}

.page-faq .qa__icon::after {
  width: 2px;
  height: 14px;
  transition: transform 0.3s var(--ease);
}

.page-faq .qa[open] .qa__icon::after {
  transform: scaleY(0);
}

.page-faq .qa__a {
  padding: 0 20px 20px 54px;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .qa__a p {
  margin: 0 0 10px;
}

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

.page-faq .qa__a a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__a a:hover {
  color: var(--c-orange-soft);
}

.page-faq .qa__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

/* 平滑高度过渡（支持时生效，否则直接展开） */
@supports (interpolate-size: allow-keywords) {
  .page-faq .faq-list {
    interpolate-size: allow-keywords;
  }

  .page-faq .qa::details-content {
    block-size: 0;
    overflow: hidden;
    transition: block-size 0.35s var(--ease), content-visibility 0.35s allow-discrete;
  }

  .page-faq .qa[open]::details-content {
    block-size: auto;
  }
}

/* ---------- 步骤条 ---------- */
.page-faq .steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .steps li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--c-text);
  background: rgba(33, 230, 193, 0.06);
}

.page-faq .steps li span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-cyan);
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--c-panel-2);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1100 / 720;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 10px 16px;
  border-top: 1px solid var(--c-line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
}

/* ---------- 结尾引导 ---------- */
.page-faq .faq-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--r-lg);
}

@media (min-width: 880px) {
  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1.5fr) auto;
    align-items: center;
  }
}

.page-faq .faq-cta__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.2vw, 32px);
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--c-text);
}

.page-faq .faq-cta__text {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__icon::after,
  .page-faq .qa__q,
  .page-faq .faq-rail__link,
  .page-faq .filter {
    transition: none;
  }

  .page-faq .qa::details-content {
    transition: none;
  }
}