.page-faq {
  --faq-sticky-top: 6.5rem;
  background: var(--chalk);
  color: var(--ink-900);
  font-family: var(--font-body);
}

.page-faq .container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 顶部区 ---------- */
.page-faq .faq-top {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.4rem, 3.4vw, 2.4rem) clamp(1.5rem, 3vw, 2.4rem);
  border-bottom: 1px solid var(--line-300);
  background:
    linear-gradient(140deg, rgba(79, 176, 126, 0.16) 0%, rgba(232, 242, 236, 0) 48%),
    var(--chalk);
}

.page-faq .faq-top::after {
  content: "";
  position: absolute;
  inset-inline-end: -7rem;
  inset-block-start: -5rem;
  width: 18rem;
  height: 18rem;
  transform: rotate(18deg);
  border: 1px solid rgba(23, 105, 75, 0.2);
  pointer-events: none;
}

.page-faq .faq-head {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.1rem;
  max-width: 46rem;
}

.page-faq .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--pitch-600);
}

.page-faq .faq-title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
}

.page-faq .faq-head h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 5.6vw, 3.4rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-faq .lede {
  margin: 0;
  max-width: 40rem;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--slate-500);
}

/* ---------- 主栅格 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.2rem, 3vw, 2.4rem);
  align-items: start;
  padding-block: clamp(1.4rem, 3vw, 2.2rem) clamp(2.6rem, 6vw, 4.5rem);
}

/* ---------- 锚点阶梯 ---------- */
.page-faq .faq-stair-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--slate-500);
  display: none;
}

.page-faq .faq-stair-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0.35rem;
  display: flex;
  flex-direction: row;
  gap: 0.35rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-stair-list li {
  flex: none;
}

.page-faq .faq-stair-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--line-300);
  border-radius: 2px;
  background: #fff;
  color: var(--slate-500);
  font-size: 0.8rem;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) ease, color var(--dur) ease, background-color var(--dur) ease;
}

.page-faq .faq-stair-list a .num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--turf-300);
}

.page-faq .faq-stair-list a:hover,
.page-faq .faq-stair-list a:focus-visible {
  border-color: var(--turf-300);
  color: var(--pitch-600);
  background: var(--turf-050);
}

/* ---------- 台阶卡片 ---------- */
.page-faq .faq-steps {
  min-width: 0;
  display: block;
}

.page-faq .faq-step {
  position: relative;
  margin-bottom: 0.9rem;
  border: 1px solid var(--line-300);
  border-radius: 3px;
  background: #fff;
  scroll-margin-top: 7.5rem;
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-faq .faq-step:hover {
  border-color: var(--turf-300);
  box-shadow: 0 8px 20px -16px rgba(8, 37, 28, 0.6);
}

.page-faq .faq-step > summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-step-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--pitch-700);
  background: var(--turf-050);
  border: 1px solid var(--line-300);
  border-radius: 2px;
  padding: 0.15rem 0.42rem;
  line-height: 1.3;
}

.page-faq .faq-step-title {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.12rem, 2.3vw, 1.4rem);
  line-height: 1.28;
  letter-spacing: -0.005em;
  color: var(--ink-900);
}

.page-faq .faq-step-cue {
  flex: none;
  position: relative;
  width: 1rem;
  height: 1rem;
  color: var(--slate-500);
}

.page-faq .faq-step-cue::before,
.page-faq .faq-step-cue::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform var(--dur) ease, opacity var(--dur) ease;
}

.page-faq .faq-step-cue::before {
  inset-inline: 0;
  inset-block-start: 50%;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-step-cue::after {
  inset-block: 0;
  inset-inline-start: 50%;
  width: 2px;
  transform: translateX(-50%);
}

.page-faq .faq-step[open] .faq-step-cue::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-step[open] .faq-step-cue {
  color: var(--pitch-600);
}

@keyframes faq-body-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-step-body {
  padding: 0 1rem 1.3rem;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--ink-900);
  animation: faq-body-in 180ms ease both;
}

.page-faq .faq-step-body p {
  margin: 0 0 0.7rem;
}

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

.page-faq .faq-step-body a {
  color: var(--pitch-600);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--dur) ease;
}

.page-faq .faq-step-body a:hover {
  color: var(--turf-300);
}

/* ---------- 下一步 ---------- */
.page-faq .faq-next {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  margin-top: 0.9rem !important;
  padding: 0.65rem 0.8rem;
  border-inline-start: 3px solid var(--turf-300);
  border-radius: 0 2px 2px 0;
  background: var(--turf-050);
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--ink-900);
}

.page-faq .faq-next-label {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--pitch-600);
  padding-top: 0.16rem;
}

/* ---------- 对照卡 ---------- */
.page-faq .faq-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
  margin: 0.2rem 0 0.2rem;
}

.page-faq .compare-card {
  border: 1px solid var(--line-300);
  border-top-width: 3px;
  border-radius: 2px;
  background: #fff;
  padding: 0.85rem 0.9rem;
}

.page-faq .compare-card--new {
  border-top-color: var(--pitch-600);
}

.page-faq .compare-card--old {
  border-top-color: var(--card-yellow);
}

.page-faq .compare-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink-900);
}

.page-faq .compare-card--old .compare-title {
  color: var(--ink-900);
}

.page-faq .compare-list {
  margin: 0;
  padding-inline-start: 1rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--slate-500);
}

.page-faq .compare-list li {
  margin-bottom: 0.3rem;
}

.page-faq .compare-list li:last-child {
  margin-bottom: 0;
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0.9rem 0;
  border: 1px solid var(--line-300);
  border-radius: 3px;
  overflow: hidden;
  background: var(--chalk);
}

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

.page-faq .faq-figure figcaption {
  padding: 0.55rem 0.8rem;
  border-top: 1px solid var(--line-300);
  background: #fff;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--slate-500);
}

/* ---------- 层级示意 ---------- */
.page-faq .faq-levels {
  margin: 0.8rem 0;
  padding: 0.85rem 0.75rem;
  border: 1px solid #124536;
  border-radius: 3px;
  background: linear-gradient(155deg, #0d3327 0%, #08251C 62%, #0a2e23 100%);
  overflow-x: auto;
}

.page-faq .faq-levels svg {
  display: block;
  width: 100%;
  min-width: 20rem;
  height: auto;
}

/* ---------- 联系信息 ---------- */
.page-faq .faq-pathnote {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--slate-500);
}

.page-faq .faq-pathnote code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--turf-050);
  background: var(--pitch-900);
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
  word-break: break-all;
}

.page-faq .faq-contact-list {
  list-style: none;
  margin: 0.8rem 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.45rem;
}

.page-faq .faq-contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.3rem 0.7rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--line-300);
  border-radius: 2px;
  background: var(--chalk);
  font-size: 0.9rem;
}

.page-faq .faq-contact-key {
  flex: none;
  min-width: 4.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--slate-500);
}

.page-faq .faq-contact-val {
  flex: 1 1 auto;
  min-width: 0;
  word-break: break-all;
  color: var(--ink-900);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 40rem) {
  .page-faq .faq-compare {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-contact-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面：侧栏阶梯 + 错位台阶 ---------- */
@media (min-width: 62rem) {
  .page-faq .faq-layout {
    grid-template-columns: 13rem minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.4rem);
  }

  .page-faq .faq-stair-nav {
    position: sticky;
    top: var(--faq-sticky-top);
    align-self: start;
  }

  .page-faq .faq-stair-title {
    display: block;
  }

  .page-faq .faq-stair-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-stair-list a {
    display: flex;
    width: auto;
    padding: 0.5rem 0.4rem 0.5rem 0.6rem;
    border: 0;
    border-inline-start: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    white-space: normal;
    transition: color var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease, margin-inline-start var(--dur) ease;
  }

  .page-faq .faq-stair-list a:hover,
  .page-faq .faq-stair-list a:focus-visible {
    background: rgba(79, 176, 126, 0.08);
    border-inline-start-color: var(--turf-300);
  }

  .page-faq .faq-stair-list li:nth-child(1) a { margin-inline-start: 0; }
  .page-faq .faq-stair-list li:nth-child(2) a { margin-inline-start: 0.35rem; }
  .page-faq .faq-stair-list li:nth-child(3) a { margin-inline-start: 0.7rem; }
  .page-faq .faq-stair-list li:nth-child(4) a { margin-inline-start: 1.05rem; }
  .page-faq .faq-stair-list li:nth-child(5) a { margin-inline-start: 1.4rem; }
  .page-faq .faq-stair-list li:nth-child(6) a { margin-inline-start: 1.75rem; }

  .page-faq .faq-step:nth-of-type(1) { margin-inline-start: 0; }
  .page-faq .faq-step:nth-of-type(2) { margin-inline-start: 0.9rem; }
  .page-faq .faq-step:nth-of-type(3) { margin-inline-start: 1.8rem; }
  .page-faq .faq-step:nth-of-type(4) { margin-inline-start: 2.7rem; }
  .page-faq .faq-step:nth-of-type(5) { margin-inline-start: 3.6rem; }
  .page-faq .faq-step:nth-of-type(6) { margin-inline-start: 4.5rem; }

  .page-faq .faq-step > summary {
    padding: 1.15rem 1.2rem;
    gap: 0.9rem;
  }

  .page-faq .faq-step-body {
    padding: 0 1.2rem 1.45rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step-body {
    animation: none;
  }

  .page-faq .faq-step-cue::before,
  .page-faq .faq-step-cue::after,
  .page-faq .faq-stair-list a {
    transition: none;
  }
}