.page-faq {
  --faq-rail-w: 232px;
  --faq-gap: clamp(20px, 3vw, 40px);
}

/* ---------- 面包屑行 ---------- */
.page-faq .faq-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 18px;
  padding-top: clamp(14px, 2.4vw, 26px);
}

.page-faq .faq-crumbs .coord {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--c-mist);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(680px 360px at 80% 4%, rgba(184, 255, 60, 0.11), transparent 70%),
    radial-gradient(520px 300px at 8% 92%, rgba(95, 211, 196, 0.1), transparent 72%);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: var(--faq-gap);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 12px 0 18px;
  font-size: clamp(2.05rem, 7vw, 4.05rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__accent {
  color: var(--c-lime);
  box-shadow: inset 0 -0.22em 0 rgba(184, 255, 60, 0.22);
}

.page-faq .faq-hero__lede {
  max-width: 60ch;
  margin: 0 0 26px;
  line-height: 1.85;
}

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

.page-faq .faq-hero__media {
  margin: 0 auto;
  max-width: 420px;
  width: 100%;
}

/* ---------- 三步自查 ---------- */
.page-faq .faq-steps-section {
  position: relative;
}

.page-faq .step-rail {
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .step-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.5vw, 26px);
  background: var(--c-turf);
  border: var(--line);
  border-radius: var(--r-md);
  transition: border-color var(--t), transform var(--t);
}

.page-faq .step-card:hover {
  border-color: rgba(184, 255, 60, 0.55);
  transform: translateY(-2px);
}

.page-faq .step-card__num {
  align-self: flex-start;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--c-lime);
  border: 1px solid rgba(184, 255, 60, 0.42);
  border-radius: var(--r-sm);
}

.page-faq .step-card__title {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.4;
}

.page-faq .step-card__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-faq .step-card__link {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed rgba(42, 74, 62, 0.9);
  color: var(--c-lime);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  transition: color var(--t);
}

.page-faq .step-card__link::after {
  content: " →";
}

.page-faq .step-card__link:hover,
.page-faq .step-card__link:focus-visible {
  color: var(--c-paper);
}

/* ---------- 索引轨道 + 问答流 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(22px, 3.5vw, 48px);
  align-items: start;
}

.page-faq .faq-flow {
  display: grid;
  gap: clamp(34px, 5vw, 64px);
  min-width: 0;
}

.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail .rail {
  display: flex;
  gap: 8px;
  padding: 0 0 8px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.page-faq .faq-rail .rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: var(--line);
  border-radius: 999px;
  color: var(--c-mist);
  font-size: 0.86rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t), border-color var(--t), background var(--t);
}

.page-faq .faq-rail .rail__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--c-amber);
}

.page-faq .faq-rail .rail__link:hover,
.page-faq .faq-rail .rail__link:focus-visible {
  color: var(--c-paper);
  border-color: rgba(95, 211, 196, 0.75);
}

.page-faq .faq-rail .rail__link[aria-current="true"] {
  color: var(--c-ink);
  background: var(--c-lime);
  border-color: var(--c-lime);
}

.page-faq .faq-rail .rail__link[aria-current="true"] .rail__num {
  color: var(--c-ink);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 26px);
  min-width: 0;
}

.page-faq .faq-group__head {
  display: grid;
  gap: 10px;
  padding-bottom: 18px;
  margin-bottom: clamp(18px, 2.6vw, 28px);
  border-bottom: var(--line);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-size: clamp(1.28rem, 3vw, 1.85rem);
  line-height: 1.26;
}

.page-faq .faq-group__lede {
  margin: 0;
  max-width: 66ch;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-faq .faq-group__media {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-acc {
  margin-bottom: 10px;
  background: var(--c-turf);
  border: var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color var(--t);
}

.page-faq .faq-acc[open] {
  border-color: rgba(184, 255, 60, 0.55);
}

.page-faq .faq-acc .acc__sum {
  box-shadow: inset 3px 0 0 var(--c-grid);
  transition: box-shadow var(--t), color var(--t);
}

.page-faq .faq-acc .acc__sum:hover {
  color: var(--c-lime);
}

.page-faq .faq-acc[open] .acc__sum {
  box-shadow: inset 3px 0 0 var(--c-lime);
}

.page-faq .faq-acc .acc__body p {
  margin: 0 0 10px;
  font-size: 0.92rem;
  line-height: 1.86;
  color: var(--c-mist);
}

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

.page-faq .faq-acc .acc__body a,
.page-faq .faq-contact-card__note a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-acc .acc__body a:hover,
.page-faq .faq-contact-card__note a:hover {
  color: var(--c-lime);
}

/* ---------- 提示条 ---------- */
.page-faq .faq-tip {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 14px 18px;
  background: var(--c-amber);
  color: var(--c-black);
  border-radius: var(--r-sm);
  font-size: 0.91rem;
  font-weight: 600;
  line-height: 1.72;
}

.page-faq .faq-tip::before {
  content: "!";
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border-radius: 50%;
  background: var(--c-black);
  color: var(--c-amber);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 800;
}

/* ---------- 联系方式卡 ---------- */
.page-faq .faq-contact-card {
  display: grid;
  gap: 0;
  padding: clamp(20px, 3vw, 32px);
}

.page-faq .faq-contact-card__row {
  display: grid;
  gap: 6px 16px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(42, 74, 62, 0.9);
}

.page-faq .faq-contact-card__k {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-faq .faq-contact-card__v {
  font-family: var(--font-mono);
  font-size: clamp(0.96rem, 2.4vw, 1.1rem);
  font-weight: 700;
  color: var(--c-paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact-card__note {
  margin: 18px 0 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-faq .faq-contact-card .btn {
  margin-top: 20px;
  justify-self: start;
}

/* ---------- 平板及桌面 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-contact-card__row {
    grid-template-columns: 110px minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 820px) {
  .page-faq .step-rail {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-faq .step-card + .step-card::before {
    content: "→";
    position: absolute;
    left: -21px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--c-lime);
    font-family: var(--font-mono);
    font-size: 1rem;
    line-height: 1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    gap: clamp(30px, 5vw, 72px);
  }

  .page-faq .faq-hero__media {
    max-width: none;
    margin: 0;
  }
}

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

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .faq-rail .rail {
    display: block;
    gap: 0;
    padding: 0;
    overflow: visible;
  }

  .page-faq .faq-rail .rail__link {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 11px 12px;
    margin-bottom: 4px;
    border: 1px solid transparent;
    border-left: 3px solid var(--c-grid);
    border-radius: 0 var(--r-sm) var(--r-sm) 0;
    white-space: normal;
  }

  .page-faq .faq-rail .rail__link:hover,
  .page-faq .faq-rail .rail__link:focus-visible {
    background: rgba(95, 211, 196, 0.08);
    border-left-color: var(--c-cyan);
  }

  .page-faq .faq-rail .rail__link[aria-current="true"] {
    color: var(--c-lime);
    background: linear-gradient(90deg, rgba(184, 255, 60, 0.14), transparent 72%);
    border-color: transparent;
    border-left-color: var(--c-lime);
  }

  .page-faq .faq-rail .rail__link[aria-current="true"] .rail__num {
    color: var(--c-lime);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .step-card,
  .page-faq .step-card__link,
  .page-faq .faq-acc,
  .page-faq .faq-acc .acc__sum,
  .page-faq .faq-rail .rail__link {
    transition: none;
  }

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