.page-faq {
  --faq-line: 1px solid rgba(31, 90, 67, 0.85);
  --faq-soft: rgba(237, 244, 238, 0.055);
  --faq-sticky: 5.6rem;
  color: var(--white);
  padding-bottom: clamp(2rem, 6vw, 4rem);
}

.page-faq .faq-crumb {
  padding-top: clamp(1rem, 3vw, 1.8rem);
}

.page-faq .faq-crumb .breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding-bottom: clamp(1.4rem, 4vw, 2.6rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 66%;
  z-index: -1;
  background:
    radial-gradient(115% 96% at 88% 0%, rgba(216, 255, 62, 0.12), transparent 60%),
    linear-gradient(178deg, #133A2B 0%, rgba(19, 58, 43, 0) 100%);
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: 0.9rem;
  padding: clamp(1.4rem, 5vw, 3rem) 0 clamp(1.2rem, 3vw, 2rem);
  max-width: 66ch;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 6.4vw, 4.4rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  text-wrap: balance;
  overflow-wrap: anywhere;
}

.page-faq .faq-hero-lede {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(0.98rem, 2.4vw, 1.08rem);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-hero-note {
  margin: 0.2rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-hero-media {
  margin: 0;
}

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

/* ---------- 两栏骨架 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 5vw, 3.4rem);
  padding-top: clamp(1rem, 3vw, 1.8rem);
}

.page-faq .faq-index,
.page-faq .faq-body {
  min-width: 0;
}

/* ---------- 分类索引 ---------- */

.page-faq .faq-index {
  align-self: start;
  border-top: 2px solid var(--lime);
  padding-top: 1rem;
}

.page-faq .faq-index-title {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.15rem 0.9rem;
}

.page-faq .faq-index-list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.6rem;
  align-items: baseline;
  padding: 0.5rem 0.35rem 0.5rem 0.15rem;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.92rem;
  border-left: 2px solid transparent;
  transition: color 180ms ease, border-color 180ms ease, padding-left 180ms ease;
}

.page-faq .faq-index-list a .num {
  font-size: 0.72rem;
  color: var(--mist);
  transition: color 180ms ease;
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--lime);
  border-left-color: var(--lime);
  padding-left: 0.55rem;
}

.page-faq .faq-index-list a:hover .num,
.page-faq .faq-index-list a:focus-visible .num {
  color: var(--lime);
}

.page-faq .faq-index-foot {
  margin: 1.1rem 0 0;
  padding-top: 0.9rem;
  border-top: var(--faq-line);
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 问答正文 ---------- */

.page-faq .faq-body {
  counter-reset: faq;
}

.page-faq .faq-group {
  padding-top: clamp(1.6rem, 4vw, 2.4rem);
  scroll-margin-top: var(--faq-sticky);
}

.page-faq .faq-group:first-child {
  padding-top: 0;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin-bottom: 0.6rem;
}

.page-faq .faq-group-index {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 3vw, 1.65rem);
  letter-spacing: -0.01em;
  color: var(--white);
  white-space: nowrap;
}

.page-faq .faq-group-head::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(90deg, var(--lime), rgba(216, 255, 62, 0));
  transform: translateY(-0.3rem);
}

.page-faq .faq-item {
  counter-increment: faq;
  border-bottom: var(--faq-line);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.85rem;
  align-items: start;
  padding: 0.95rem 0.2rem;
  cursor: pointer;
  list-style: none;
  font-weight: 500;
  font-size: clamp(0.96rem, 2.3vw, 1.02rem);
  line-height: 1.65;
  color: var(--white);
  transition: color 180ms ease, background-color 180ms ease;
}

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

.page-faq .faq-item > summary::before {
  content: counter(faq, decimal-leading-zero);
  grid-column: 1;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  padding-top: 0.32rem;
}

.page-faq .faq-item > summary::after {
  content: "+";
  grid-column: 3;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--lime);
  padding-top: 0.1rem;
  transition: transform 200ms ease;
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(45deg);
}

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

.page-faq .faq-item[open] > summary {
  color: var(--lime);
}

.page-faq .faq-a {
  padding: 0 0 1.15rem 2.45rem;
  max-width: 68ch;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-a p {
  margin: 0 0 0.75rem;
}

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

.page-faq .faq-a a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
}

.page-faq .faq-a strong {
  color: var(--white);
  font-weight: 600;
}

/* 数值示例块 */
.page-faq .faq-sample {
  display: grid;
  gap: 0.3rem;
  margin: 0.9rem 0 0.4rem;
  padding: 0.8rem 1rem;
  background: var(--faq-soft);
  border-left: 3px solid var(--lime);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--white);
  overflow-wrap: anywhere;
}

/* 技能树式步骤 */
.page-faq .faq-steps {
  list-style: none;
  margin: 0.4rem 0 0;
  padding: 0;
  counter-reset: steps;
}

.page-faq .faq-steps li {
  position: relative;
  counter-increment: steps;
  padding: 0 0 1.15rem 2.5rem;
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-faq .faq-steps li::before {
  content: counter(steps, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.18rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--lime);
  padding: 0.14rem 0.38rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
}

.page-faq .faq-steps li::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  top: 1.75rem;
  bottom: 0.15rem;
  width: 1px;
  background: rgba(31, 90, 67, 0.95);
}

.page-faq .faq-steps li:last-child {
  padding-bottom: 0;
}

.page-faq .faq-steps li:last-child::after {
  display: none;
}

/* 更新段落图文并置 */
.page-faq .faq-update-pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.6rem;
}

.page-faq .faq-update-media {
  margin: 0 0 0.4rem;
}

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

.page-faq .faq-update-media .media-frame-caption {
  font-size: 0.78rem;
  color: var(--mist);
}

/* ---------- 收束区块 ---------- */

.page-faq .faq-fail {
  margin-top: clamp(2rem, 6vw, 3.4rem);
  padding: clamp(1.4rem, 4vw, 2.2rem);
  background: var(--g800);
  border-left: 4px solid var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-faq .faq-fail-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.2rem, 4vw, 2.4rem);
}

.page-faq .faq-fail-text h3 {
  margin: 0 0 0.7rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
  color: var(--white);
}

.page-faq .faq-fail-text p {
  margin: 0 0 0.8rem;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-fail-text a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.page-faq .faq-fail-meta {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-faq .faq-fail-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
  align-content: start;
}

.page-faq .faq-fail-links a {
  display: block;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid rgba(31, 90, 67, 0.7);
  color: var(--white);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 180ms ease, border-color 180ms ease, padding-left 180ms ease;
}

.page-faq .faq-fail-links a:hover,
.page-faq .faq-fail-links a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
  padding-left: 1.1rem;
}

/* ---------- 焦点可达 ---------- */

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

/* ---------- 桌面端 ---------- */

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(210px, 3fr) minmax(0, 8fr);
    gap: clamp(2.4rem, 5vw, 4.4rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
  }

  .page-faq .faq-index-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-a {
    padding-left: 2.6rem;
  }

  .page-faq .faq-update-pair {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: clamp(1.2rem, 3vw, 2.2rem);
    align-items: start;
  }

  .page-faq .faq-fail-body {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }
}

/* ---------- 减少动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index-list a,
  .page-faq .faq-item > summary,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-fail-links a {
    transition: none;
  }
}