.page-faq {
  background: var(--ink);
  color: var(--paper);
  padding-bottom: 8px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 34px 0 40px;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 20px;
}

.page-faq .faq-hero__frame {
  position: relative;
  border: 2px solid var(--line-strong);
  background: linear-gradient(160deg, #10202e 0%, var(--ink) 62%);
  box-shadow: var(--hard-shadow);
  padding: 26px 18px 22px;
}

.page-faq .faq-hero__corner {
  position: absolute;
  width: 14px;
  height: 14px;
}
.page-faq .faq-hero__corner--tl { top: -3px; left: -3px; border-top: 3px solid var(--cyan); border-left: 3px solid var(--cyan); }
.page-faq .faq-hero__corner--tr { top: -3px; right: -3px; border-top: 3px solid var(--cyan); border-right: 3px solid var(--cyan); }
.page-faq .faq-hero__corner--bl { bottom: -3px; left: -3px; border-bottom: 3px solid var(--cyan); border-left: 3px solid var(--cyan); }
.page-faq .faq-hero__corner--br { bottom: -3px; right: -3px; border-bottom: 3px solid var(--cyan); border-right: 3px solid var(--cyan); }

.page-faq .faq-hero__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 6.4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-hero__scale {
  height: 10px;
  margin-top: 22px;
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 13px);
  opacity: .85;
}

.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: 0;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-faq .faq-facts__cell {
  background: var(--ink-2);
  padding: 14px 13px 15px;
}

.page-faq .faq-facts__key {
  margin: 0;
  font-size: 11px;
  letter-spacing: 1.2px;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-facts__val {
  margin: 8px 0 0;
  font-size: 19px;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 30px;
  padding-bottom: 64px;
}

.page-faq .faq-index {
  border: 2px solid var(--line);
  background: var(--ink-2);
  padding: 16px 0 12px;
}

.page-faq .faq-index__title {
  margin: 0 16px 12px;
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: baseline;
  gap: 8px;
  padding: 9px 16px;
  border-left: 3px solid transparent;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-index__link .mono {
  font-size: 12px;
  color: var(--quiet);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: rgba(0, 230, 178, .07);
  outline: none;
}

.page-faq .faq-index__link:hover .mono,
.page-faq .faq-index__link:focus-visible .mono {
  color: var(--cyan);
}

/* ---------- 章节骨架 ---------- */
.page-faq .faq-sec + .faq-sec {
  margin-top: 46px;
}

.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-top: 2px solid var(--line-strong);
  padding-top: 14px;
  margin-bottom: 16px;
}

.page-faq .faq-sec__no {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--cyan);
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(21px, 4.4vw, 29px);
  line-height: 1.28;
  color: var(--paper);
}

.page-faq .faq-sec__intro {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 40em;
}

.page-faq .faq-sec__intro a,
.page-faq .qa__a a,
.page-faq .faq-help__lead a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 230, 178, .45);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-sec__intro a:hover,
.page-faq .qa__a a:hover,
.page-faq .faq-help__lead a:hover {
  border-bottom-color: var(--signal);
  color: var(--signal);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 2px solid var(--line-strong);
  background: var(--ink-2);
  box-shadow: var(--hard-shadow);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-bottom: 2px solid var(--line-strong);
}

.page-faq .faq-figure__cap {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* ---------- 服务清单六格 ---------- */
.page-faq .svc-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line-strong);
}

.page-faq .svc-card {
  position: relative;
  background: var(--ink-2);
  padding: 18px 16px 20px;
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .svc-card:hover {
  background: #16293a;
  box-shadow: inset 3px 0 0 0 var(--cyan);
}

.page-faq .svc-card__no {
  display: inline-block;
  padding: 2px 7px;
  border: 1px solid var(--line-strong);
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--cyan);
}

.page-faq .svc-card__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.35;
  color: var(--paper);
}

.page-faq .svc-card__desc {
  margin: 9px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .svc-card__scene {
  margin: 10px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--line-strong);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .svc-card__entry {
  margin: 12px 0 0;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--quiet);
}

.page-faq .svc-card:hover .svc-card__entry {
  color: var(--cyan);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-list {
  border-bottom: 2px solid var(--line);
}

.page-faq .qa {
  border-top: 2px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .qa[open] {
  border-top-color: var(--line-strong);
}

.page-faq .qa__q {
  display: block;
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 15px 44px 15px 14px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--paper);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

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

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
}

.page-faq .qa[open] .qa__q::after { content: "\2212"; }

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  background: rgba(0, 230, 178, .06);
  padding-left: 20px;
  outline: none;
}

.page-faq .qa__a {
  padding: 0 44px 18px 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .qa__a p {
  margin: 0;
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-sec--help .faq-sec__head {
  border-top-color: var(--signal);
}

.page-faq .faq-help {
  border: 2px solid var(--line-strong);
  background: var(--ink-2);
  padding: 20px 18px 22px;
  box-shadow: var(--hard-shadow);
}

.page-faq .faq-help__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-faq .faq-help__list li {
  background: var(--ink);
  padding: 12px 13px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

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

.page-faq .faq-help__note {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-faq .faq-help .btn {
  margin-top: 16px;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero { padding: 44px 0 50px; }
  .page-faq .faq-hero__frame { padding: 34px 30px 30px; }
  .page-faq .faq-facts { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-faq .svc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-faq .faq-help { padding: 26px 26px 28px; }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
    gap: 26px;
  }

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

  .page-faq .faq-body {
    grid-template-columns: 244px minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

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

@media (min-width: 1120px) {
  .page-faq .svc-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-faq .faq-body { grid-template-columns: 268px minmax(0, 1fr); gap: 58px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .svc-card,
  .page-faq .qa,
  .page-faq .qa__q {
    transition: none;
  }
  .page-faq .qa__q:hover,
  .page-faq .qa__q:focus-visible {
    padding-left: 14px;
  }
}