.page-faq {
  --faq-pad: clamp(16px, 2.4vw, 26px);
  --faq-soft: #C6D6CF;
  background: var(--ink);
  color: var(--cold);
}

.page-faq a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s ease, color .18s ease;
}

.page-faq a:hover,
.page-faq a:focus-visible {
  border-bottom-color: var(--orange);
  color: var(--cold);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ink);
  border-bottom: 1px solid var(--steel);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(105deg, rgba(11, 14, 13, .96) 0%, rgba(11, 14, 13, .86) 46%, rgba(15, 58, 50, .72) 100%),
    repeating-linear-gradient(90deg, transparent 0 78px, rgba(57, 245, 200, .06) 78px 79px);
}

.page-faq .faq-hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .4;
  filter: saturate(.55) contrast(1.15);
}

.page-faq .faq-hero-inner {
  padding-block: clamp(36px, 6.5vw, 88px);
}

.page-faq .faq-hero .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 34px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .faq-hero .breadcrumb-item a {
  color: var(--muted);
}

.page-faq .faq-hero .breadcrumb-sep {
  color: var(--steel);
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-lead {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.85;
  color: var(--faq-soft);
}

.page-faq .faq-hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: clamp(22px, 3vw, 34px);
  padding: 8px 16px;
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  background: rgba(15, 58, 50, .55);
}

.page-faq .faq-hero-meta-text {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--cold);
}

/* ---------- 三步路径 ---------- */

.page-faq .faq-trail {
  padding-block: clamp(30px, 5vw, 62px);
  background: var(--graphite);
  border-bottom: 1px solid var(--steel);
}

.page-faq .faq-trail-title {
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .trail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: center;
}

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

.page-faq .trail-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 16px 18px;
  background: var(--ink);
  border-left: 2px solid var(--steel);
  transition: border-color .2s ease;
}

.page-faq .trail-step:hover {
  border-left-color: var(--mint);
}

.page-faq .trail-num {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--mint);
}

.page-faq .trail-text h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .trail-text p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-trail-figure {
  margin: 0;
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink);
}

.page-faq .faq-trail-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
}

.page-faq .faq-trail-figure figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: .75rem;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--steel);
}

/* ---------- 主体分栏 ---------- */

.page-faq .faq-body {
  padding-block: clamp(30px, 5vw, 70px);
  align-items: start;
}

.page-faq .faq-index {
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  background: var(--graphite);
  padding: 18px 16px;
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-faq .faq-index-title {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-faq .faq-index-note {
  margin: 0 0 14px;
  font-size: .75rem;
  line-height: 1.65;
  color: var(--muted);
}

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

.page-faq .faq-index-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 8px;
  font-size: .9375rem;
  color: var(--cold);
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: background-color .18s ease, border-color .18s ease;
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  background: var(--ink);
  border-color: var(--steel);
  border-bottom-color: var(--steel);
}

.page-faq .faq-index-num {
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-faq .faq-index-card {
  margin-top: 16px;
  padding: 14px;
  border-left: 2px solid var(--orange);
  background: var(--ink);
}

.page-faq .faq-index-card-title {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-faq .faq-index-card .note {
  margin: 0;
  font-size: .75rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 问答分组 ---------- */

.page-faq .faq-main {
  display: grid;
  gap: clamp(30px, 4.4vw, 54px);
}

.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 12px;
  align-items: baseline;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--steel);
}

.page-faq .faq-group-num {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--mint);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-group-note {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: .75rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-item {
  margin-bottom: 8px;
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  background: var(--graphite);
  transition: border-color .2s ease, background-color .2s ease;
}

.page-faq .faq-item[open] {
  border-color: var(--mint);
  background: #101917;
}

.page-faq .faq-q {
  position: relative;
  display: block;
  list-style: none;
  cursor: pointer;
  padding: 14px 46px 14px 16px;
  font-size: .9688rem;
  font-weight: 600;
  line-height: 1.65;
  color: var(--cold);
}

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

.page-faq .faq-q::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--mint);
  transition: color .18s ease;
}

.page-faq .faq-item[open] .faq-q::after {
  content: "−";
  color: var(--orange);
}

.page-faq .faq-q:hover {
  color: var(--paper);
}

.page-faq .faq-a {
  padding: 0 16px 16px;
  border-top: 1px solid var(--steel);
  padding-top: 12px;
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 68ch;
  font-size: .9375rem;
  line-height: 1.9;
  color: var(--faq-soft);
}

/* ---------- 收束联系区 ---------- */

.page-faq .faq-tail {
  border-top: 1px solid var(--steel);
  background:
    linear-gradient(120deg, rgba(15, 58, 50, .85), rgba(11, 14, 13, .96) 62%),
    var(--graphite);
}

.page-faq .faq-tail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.6vw, 44px);
  align-items: start;
}

.page-faq .faq-tail .eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .2em;
  color: var(--orange);
}

.page-faq .faq-tail-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-tail-text {
  margin: 0 0 20px;
  max-width: 56ch;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--faq-soft);
}

.page-faq .faq-tail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.page-faq .faq-tail-actions .btn {
  border-bottom: 1px solid transparent;
  padding: 11px 20px;
  font-size: .875rem;
  letter-spacing: .02em;
}

.page-faq .faq-tail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--steel);
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-tail-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 12px 14px;
  background: var(--ink);
}

.page-faq .faq-tail-key {
  font-size: .6875rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-faq .faq-tail-value {
  font-size: .9375rem;
  line-height: 1.65;
  color: var(--cold);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-faq .faq-tail-row {
    grid-template-columns: 84px 1fr;
    gap: 12px;
    align-items: baseline;
  }

  .page-faq .faq-q {
    padding: 16px 52px 16px 20px;
  }

  .page-faq .faq-a {
    padding: 14px 20px 20px;
  }
}

@media (min-width: 880px) {
  .page-faq .trail-grid {
    grid-template-columns: 1.1fr .9fr;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    margin-bottom: 0;
  }

  .page-faq .faq-tail-grid {
    grid-template-columns: 1.15fr .85fr;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero h1 {
    max-width: 24ch;
  }

  .page-faq .trail-step {
    padding: 20px 22px;
  }
}