.page-faq {
  --faq-index-w: 264px;
  --faq-hero-pad-top: clamp(24px, 4vw, 44px);
  background:
    radial-gradient(120% 80% at 88% -10%, rgba(34, 224, 214, 0.10), transparent 62%),
    radial-gradient(90% 60% at 0% 20%, rgba(255, 138, 61, 0.06), transparent 70%);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: var(--faq-hero-pad-top) 0 clamp(30px, 5vw, 56px);
  border-bottom: 1px solid var(--cmd-line);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 28px;
  margin-top: clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero__copy h1 {
  margin: 12px 0 0;
  font-family: var(--cmd-font-display);
  font-size: clamp(29px, 6.4vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--cmd-fog);
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--cmd-body);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__jump a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--cmd-line);
  border-radius: var(--cmd-pill);
  background: rgba(18, 42, 64, 0.42);
  color: var(--cmd-fog);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color var(--cmd-fast) var(--cmd-ease), background var(--cmd-fast) var(--cmd-ease), color var(--cmd-fast) var(--cmd-ease);
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  border-color: var(--cmd-cyan);
  background: var(--cmd-cyan-08);
  color: var(--cmd-cyan);
}

.page-faq .faq-hero__jump .cmd-num {
  font-size: 12px;
  color: var(--cmd-orange);
}

.page-faq .faq-hero__panel {
  padding: 16px;
  border: 1px solid var(--cmd-line);
  border-radius: var(--cmd-radius);
  background: var(--cmd-glass-bg);
  backdrop-filter: blur(10px);
}

.page-faq .faq-diagram {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-diagram__t {
  font-family: var(--cmd-font-body);
  font-size: 12px;
  fill: var(--cmd-fog);
}

.page-faq .faq-diagram__k {
  font-family: var(--cmd-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  fill: var(--cmd-cyan);
}

.page-faq .faq-diagram__s {
  font-family: var(--cmd-font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  fill: var(--cmd-mute);
}

.page-faq .faq-hero__cap {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--cmd-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--cmd-mute);
}

/* ---------- 筛选带 ---------- */
.page-faq .faq-filter {
  padding: 14px 0;
  border-bottom: 1px solid var(--cmd-line);
  background: rgba(11, 27, 45, 0.55);
}

.page-faq .faq-filter__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.page-faq .faq-filter__label {
  margin: 0;
  font-family: var(--cmd-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cmd-faint);
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 30px;
  padding: clamp(32px, 5vw, 60px) 0 clamp(48px, 7vw, 88px);
}

.page-faq .faq-index {
  padding: 14px;
  border: 1px solid var(--cmd-line);
  border-radius: var(--cmd-radius);
  background: var(--cmd-glass-bg);
  align-self: start;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--cmd-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cmd-faint);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 10px 8px;
  border-left: 2px solid transparent;
  border-radius: 8px;
  color: var(--cmd-body);
  font-size: 14px;
  text-decoration: none;
  transition: background var(--cmd-fast) var(--cmd-ease), border-color var(--cmd-fast) var(--cmd-ease), color var(--cmd-fast) var(--cmd-ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-left-color: var(--cmd-cyan);
  background: var(--cmd-cyan-08);
  color: var(--cmd-fog);
}

.page-faq .faq-index__coord {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cmd-cyan);
}

.page-faq .faq-index__meta {
  font-size: 11px;
  color: var(--cmd-faint);
}

.page-faq .faq-index__legend {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--cmd-line);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(30px, 4vw, 46px);
  scroll-margin-top: 92px;
}

.page-faq .faq-group[hidden] {
  display: none;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--cmd-line);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--cmd-font-display);
  font-size: clamp(21px, 3.4vw, 29px);
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--cmd-fog);
}

.page-faq .faq-group__coord {
  padding: 3px 7px;
  border: 1px solid var(--cmd-cyan-45);
  border-radius: 4px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cmd-cyan);
  white-space: nowrap;
}

.page-faq .faq-group__intro {
  margin: 12px 0 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--cmd-body);
}

.page-faq .faq-group__list {
  margin-top: 18px;
  border-top: 1px solid var(--cmd-line-soft);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-q {
  border-bottom: 1px solid var(--cmd-line-soft);
}

.page-faq .faq-q > summary {
  position: relative;
  display: block;
  padding: 15px 34px 15px 0;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--cmd-fog);
  transition: color var(--cmd-fast) var(--cmd-ease);
}

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

.page-faq .faq-q > summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 13px;
  font-family: var(--cmd-font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cmd-cyan);
}

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

.page-faq .faq-q > summary:hover,
.page-faq .faq-q[open] > summary {
  color: var(--cmd-cyan);
}

.page-faq .faq-q > summary:focus-visible {
  outline: 2px solid var(--cmd-orange);
  outline-offset: 2px;
  border-radius: 4px;
}

.page-faq .faq-a {
  margin: 0 0 6px;
  padding: 0 0 16px 14px;
  border-left: 2px solid var(--cmd-orange);
  color: var(--cmd-body);
}

.page-faq .faq-a p {
  margin: 0 0 10px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
}

.page-faq .faq-a > *:last-child {
  margin-bottom: 0;
}

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

.page-faq .faq-steps {
  counter-reset: faqstep;
  display: grid;
  gap: 8px;
  margin: 8px 0 12px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 32px;
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  padding: 1px 4px;
  border: 1px solid rgba(255, 138, 61, 0.4);
  border-radius: 4px;
  font-family: var(--cmd-font-mono);
  font-size: 11px;
  line-height: 1.5;
  color: var(--cmd-orange);
}

.page-faq .faq-checks {
  display: grid;
  gap: 6px;
  margin: 8px 0 12px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-checks li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cmd-cyan);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 6px;
}

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

.page-faq .faq-figure__frame--wide {
  aspect-ratio: 5 / 3;
}

/* ---------- 结尾指引 ---------- */
.page-faq .faq-cta {
  padding: clamp(34px, 5vw, 64px) 0;
  border-top: 1px solid var(--cmd-line);
  background: linear-gradient(180deg, rgba(255, 138, 61, 0.09), transparent 72%);
}

.page-faq .faq-cta__title {
  margin: 12px 0 0;
  font-family: var(--cmd-font-display);
  font-size: clamp(21px, 3.4vw, 30px);
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--cmd-fog);
}

.page-faq .faq-cta__grid {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-cta__card {
  display: grid;
  gap: 6px;
  padding: 16px;
  border: 1px solid var(--cmd-line);
  border-radius: var(--cmd-radius-sm);
  background: rgba(11, 27, 45, 0.72);
  color: var(--cmd-body);
  text-decoration: none;
  transition: border-color var(--cmd-fast) var(--cmd-ease), transform var(--cmd-fast) var(--cmd-ease), background var(--cmd-fast) var(--cmd-ease);
}

.page-faq .faq-cta__card:hover,
.page-faq .faq-cta__card:focus-visible {
  border-color: var(--cmd-cyan);
  background: rgba(18, 42, 64, 0.9);
  transform: translateY(-2px);
}

.page-faq .faq-cta__coord {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cmd-orange);
}

.page-faq .faq-cta__name {
  font-family: var(--cmd-font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--cmd-fog);
}

.page-faq .faq-cta__desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--cmd-mute);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-cta__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-group__head {
    padding-top: 18px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: clamp(28px, 4vw, 48px);
  }

  .page-faq .faq-hero__panel {
    padding: 20px;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 52px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-cta__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__jump a,
  .page-faq .faq-index__list a,
  .page-faq .faq-q > summary,
  .page-faq .faq-cta__card {
    transition: none;
  }

  .page-faq .faq-cta__card:hover,
  .page-faq .faq-cta__card:focus-visible {
    transform: none;
  }
}