.page-faq {
  padding-top: clamp(88px, 10vh, 118px);
  padding-bottom: 88px;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-faq .breadcrumb-item {
  display: flex;
  align-items: center;
  color: var(--silver);
}

.page-faq .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 6px;
  color: var(--grid-line);
}

.page-faq .breadcrumb-link {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .breadcrumb-link:hover,
.page-faq .breadcrumb-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .breadcrumb-current {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 4px 0 60px;
  background-image:
    radial-gradient(72% 130% at 10% 0%, rgba(196, 249, 74, 0.1), transparent 66%),
    radial-gradient(58% 110% at 94% 6%, rgba(138, 107, 255, 0.13), transparent 70%);
  background-repeat: no-repeat;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 14ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 8.4vw, 92px);
  line-height: 0.98;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-faq .faq-hero .lead {
  margin: 24px 0 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .faq-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--grid-line);
  background: rgba(18, 28, 61, 0.62);
  font-size: 13px;
  line-height: 1.4;
  color: var(--silver);
}

.page-faq .faq-meta .mono {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--lime);
}

/* ---------- 分组导航 ---------- */
.page-faq .faq-cats-head {
  display: grid;
  gap: 10px;
  margin-bottom: 30px;
}

.page-faq .faq-cats-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-cats-head p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .faq-cats-figure,
.page-faq .faq-figure {
  margin: 0;
  aspect-ratio: auto;
  border: 1px solid var(--grid-line);
  background: var(--ink-room);
  overflow: hidden;
}

.page-faq .faq-cats-figure {
  margin-bottom: 32px;
}

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

.page-faq .faq-cats-figure .media-frame-note,
.page-faq .faq-figure .media-frame-note {
  position: static;
  display: block;
  padding: 12px 16px;
  border-top: 1px solid var(--grid-line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--silver);
  background: transparent;
}

.page-faq .faq-cat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-faq .faq-cat {
  display: grid;
  gap: 6px;
  padding: 18px 16px 20px;
  border: 1px solid var(--grid-line);
  background: rgba(18, 28, 61, 0.5);
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  border-color: var(--lime);
  background: rgba(196, 249, 74, 0.07);
  transform: translateY(-2px);
}

.page-faq .faq-cat-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--silver);
}

.page-faq .faq-cat-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-cat-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 36px;
  padding-top: 8px;
}

.page-faq .faq-rail {
  display: none;
}

.page-faq .faq-rail-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--silver);
}

.page-faq .faq-rail .chapter-rail {
  display: grid;
  gap: 2px;
  border-left: 1px solid var(--grid-line);
}

.page-faq .faq-rail .chapter-rail-link {
  display: block;
  padding: 8px 12px;
  border-left: 2px solid transparent;
  margin-left: -1px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--silver);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-rail .chapter-rail-link:hover {
  color: var(--paper);
  background: rgba(38, 50, 92, 0.45);
}

.page-faq .faq-rail .chapter-rail-link[aria-current="true"] {
  border-left-color: var(--lime);
  color: var(--paper);
  background: rgba(196, 249, 74, 0.08);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 120px;
  padding-top: 56px;
  border-top: 1px solid var(--grid-line);
}

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

.page-faq .faq-group-head {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: baseline;
  padding-top: 18px;
  margin-bottom: 24px;
}

.page-faq .faq-group-head::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background: linear-gradient(90deg, var(--lime), var(--cyan));
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--silver);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-group-note {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--silver);
}

/* ---------- 折叠问答项 ---------- */
.page-faq .qa-list {
  display: grid;
  gap: 12px;
}

.page-faq .qa-list--dense {
  display: grid;
  gap: 12px;
}

.page-faq .qa-item {
  background: var(--ink-room);
  border: 1px solid var(--grid-line);
  box-shadow: inset 2px 0 0 transparent;
  transition: box-shadow 0.24s ease, border-color 0.24s ease;
}

.page-faq .qa-item[open] {
  border-color: rgba(196, 249, 74, 0.32);
  box-shadow: inset 2px 0 0 var(--lime);
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.3;
  color: var(--cyan);
}

.page-faq .qa-item[open] .qa-q::after {
  content: "\2013";
  color: var(--lime);
}

.page-faq .qa-a {
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .qa-a p {
  margin: 0 0 0.72em;
}

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

.page-faq .qa-a .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--paper);
}

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

.page-faq .qa-steps li {
  position: relative;
  counter-increment: qa-step;
  padding-left: 36px;
  line-height: 1.7;
}

.page-faq .qa-steps li::before {
  content: counter(qa-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lime);
}

.page-faq .faq-figure {
  margin-top: 28px;
}

/* ---------- 联系收尾 ---------- */
.page-faq .faq-contact {
  margin-top: 64px;
  padding: 34px 22px 30px;
  background: var(--ink-room);
  border-top: 2px solid var(--lime);
  border-right: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
  border-left: 1px solid var(--grid-line);
}

.page-faq .faq-contact h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-contact-lead {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .faq-contact-grid {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-contact-card {
  padding: 18px 16px;
  border: 1px solid var(--grid-line);
  background: rgba(10, 18, 38, 0.6);
}

.page-faq .faq-contact-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-contact-value {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 16px;
  word-break: break-all;
  color: var(--paper);
}

.page-faq .faq-contact-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--silver);
}

.page-faq .faq-contact-addr {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .faq-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-contact {
    padding: 40px 32px 34px;
  }

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

@media (min-width: 820px) {
  .page-faq .qa-list--dense {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-cat-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .faq-body {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 60px;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: 112px;
    align-self: start;
  }

  .page-faq .faq-group {
    padding-top: 64px;
  }

  .page-faq .qa-q {
    font-size: 17px;
  }

  .page-faq .qa-a {
    padding: 0 22px 20px;
  }

  .page-faq .qa-q {
    padding: 18px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .qa-item,
  .page-faq .breadcrumb-link,
  .page-faq .faq-rail .chapter-rail-link {
    transition: none;
  }

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