.page-faq {
  --faq-indent: 52px;
  --faq-ink-soft: #384766;
  background: var(--night-900);
  color: var(--mist-200);
  font-family: var(--font-sans);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 60px) 0 0;
  background:
    radial-gradient(130% 100% at 88% -10%, rgba(184, 255, 61, .16) 0%, rgba(184, 255, 61, 0) 58%),
    linear-gradient(180deg, var(--navy-800) 0%, var(--night-900) 100%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(34vw, 380px);
  height: 100%;
  background: linear-gradient(205deg, rgba(18, 36, 74, .95), rgba(5, 11, 24, 0));
  border-left: 1px solid var(--line-soft);
  transform: skewX(-9deg);
  transform-origin: top right;
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
}

.page-faq .crumbs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 34px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--steel-400);
}

.page-faq .crumbs-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--steel-600);
}

.page-faq .crumbs-list a {
  color: var(--steel-400);
  text-decoration: none;
}

.page-faq .crumbs-list a:hover {
  color: var(--lime-400);
}

.page-faq .crumbs-list [aria-current="page"] {
  color: var(--mist-200);
}

.page-faq .kicker {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--lime-400);
}

.page-faq .faq-title {
  margin: 0;
  max-width: min(20ch, 100%);
  font-size: clamp(38px, 7.6vw, 100px);
  font-weight: 250;
  line-height: .99;
  letter-spacing: -.02em;
  color: var(--paper-050);
}

.page-faq .faq-lede {
  margin: 26px 0 0;
  max-width: 58ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--mist-200);
}

.page-faq .faq-metrics {
  margin-top: clamp(36px, 6vw, 66px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  border-top: 1px solid var(--line);
}

.page-faq .faq-metric {
  padding: 22px 22px 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-metric-num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1;
  color: var(--lime-400);
}

.page-faq .faq-metric-label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel-400);
}

/* ---------- 问题组 ---------- */
.page-faq .faq-groups {
  padding: clamp(40px, 7vw, 88px) 0 clamp(56px, 8vw, 104px);
  background: var(--night-900);
}

.page-faq .faq-tablist {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-faq .faq-tablist::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-tablist .tab {
  appearance: none;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex: 0 0 auto;
  margin-bottom: -1px;
  padding: 14px 16px;
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--steel-400);
  white-space: nowrap;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-tablist .tab:hover {
  color: var(--mist-200);
}

.page-faq .faq-tablist .tab:focus-visible {
  outline: 2px solid var(--lime-400);
  outline-offset: -4px;
}

.page-faq .faq-tablist .tab[aria-selected="true"] {
  color: var(--lime-400);
  border-bottom-color: var(--lime-400);
}

.page-faq .tab-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--steel-600);
}

.page-faq .faq-tablist .tab[aria-selected="true"] .tab-num {
  color: var(--lime-600);
}

.page-faq .faq-panel {
  padding: clamp(30px, 5vw, 54px) 0 0;
}

.page-faq .faq-panel[hidden] {
  display: none;
}

.page-faq .faq-panel:focus {
  outline: none;
}

.page-faq .faq-panel:focus-visible {
  outline: 2px solid var(--lime-400);
  outline-offset: 10px;
}

/* ---------- 图片与图注 ---------- */
.page-faq .faq-banner {
  margin: 0 0 clamp(30px, 4.5vw, 46px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--navy-800), var(--night-900));
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-banner--wide img {
  aspect-ratio: 14 / 9;
}

.page-faq .faq-banner figcaption {
  padding: 14px 18px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .05em;
  color: var(--steel-400);
}

/* ---------- 新手三步 ---------- */
.page-faq .faq-steps {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-faq .faq-step {
  padding: 24px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--lime-400);
}

.page-faq .faq-step-title {
  margin: 10px 0 8px;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: .01em;
  color: var(--paper-050);
}

.page-faq .faq-step p {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-200);
}

/* ---------- 问题列表与索引 ---------- */
.page-faq .faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

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

.page-faq .faq-list {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa {
  position: relative;
  border-top: 1px solid var(--line-soft);
}

.page-faq .qa[open] {
  background: linear-gradient(90deg, rgba(184, 255, 61, .06), rgba(184, 255, 61, 0) 64%);
}

.page-faq .qa[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--lime-400);
}

.page-faq .qa-q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 20px 46px 20px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper-050);
  transition: color .18s var(--ease);
}

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

.page-faq .qa-q::marker {
  content: "";
}

.page-faq .qa-q:hover {
  color: var(--lime-400);
}

.page-faq .qa-q::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 400;
  line-height: 1;
  color: var(--lime-400);
}

.page-faq .qa[open] .qa-q::after {
  content: "–";
}

.page-faq .qa-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--steel-400);
}

.page-faq .qa[open] .qa-num {
  color: var(--lime-400);
}

.page-faq .qa-a {
  padding: 0 46px 24px var(--faq-indent);
}

.page-faq .qa-a p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-200);
}

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

.page-faq .faq-inline-link {
  color: var(--lime-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(184, 255, 61, .45);
  padding-bottom: 1px;
}

.page-faq .faq-inline-link:hover {
  border-bottom-color: var(--lime-400);
}

.page-faq .faq-inline-link--dark {
  color: var(--navy-700);
  border-bottom-color: rgba(18, 36, 74, .4);
}

.page-faq .faq-inline-link--dark:hover {
  color: var(--ember-500);
  border-bottom-color: var(--ember-500);
}

.page-faq .faq-aside {
  border-top: 1px solid var(--line);
  padding-top: 18px;
  min-width: 0;
}

.page-faq .faq-aside-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--steel-400);
}

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

.page-faq .faq-aside-link {
  display: block;
  padding: 9px 0 9px 14px;
  border-left: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist-200);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-aside-link:hover,
.page-faq .faq-aside-link.is-active {
  color: var(--lime-400);
  border-left-color: var(--lime-400);
}

.page-faq .faq-aside-note {
  margin: 20px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.8;
  color: var(--steel-400);
}

/* ---------- 三栏示意 ---------- */
.page-faq .faq-diagram {
  margin: clamp(34px, 5vw, 52px) 0 clamp(28px, 4vw, 40px);
  padding: 22px 22px 18px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 36, 74, .55), rgba(5, 11, 24, .2));
}

.page-faq .faq-diagram svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-diagram figcaption {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel-400);
}

/* ---------- 企业参数 ---------- */
.page-faq .faq-specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  border-top: 1px solid var(--line);
  margin-bottom: clamp(28px, 4vw, 40px);
}

.page-faq .faq-spec {
  padding: 20px 20px 20px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-spec-k {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--steel-400);
}

.page-faq .faq-spec-v {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 18px;
  line-height: 1.2;
  color: var(--lime-400);
}

.page-faq .faq-spec-d {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-200);
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  padding: clamp(46px, 8vw, 96px) 0;
  background: var(--paper-050);
  color: var(--ink-950);
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

.page-faq .faq-contact-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ember-500);
}

.page-faq .faq-contact-title {
  margin: 0 0 20px;
  max-width: 18ch;
  font-size: clamp(28px, 4.2vw, 52px);
  font-weight: 250;
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--ink-950);
}

.page-faq .faq-contact-lead p {
  margin: 0 0 14px;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-contact-lead p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-contact-card {
  padding: 26px 24px 22px;
  border: 1px solid rgba(18, 36, 74, .22);
  border-left: 3px solid var(--navy-700);
  background: #fff;
}

.page-faq .faq-contact-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--steel-400);
}

.page-faq .faq-contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(18, 36, 74, .14);
}

.page-faq .faq-contact-mail {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink-950);
  word-break: break-all;
}

.page-faq .faq-copy {
  flex: 0 0 auto;
}

.page-faq .faq-contact-facts {
  margin: 0;
  padding-top: 18px;
}

.page-faq .faq-fact {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(18, 36, 74, .08);
}

.page-faq .faq-fact:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-fact dt {
  flex: 0 0 92px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel-600);
}

.page-faq .faq-fact dd {
  flex: 1 1 180px;
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-950);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-step {
    padding: 26px 28px 26px 0;
    border-right: 1px solid var(--line-soft);
  }

  .page-faq .faq-step:last-child {
    border-right: 0;
    padding-right: 0;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-grid {
    grid-template-columns: minmax(0, 1fr) 236px;
    gap: 56px;
  }

  .page-faq .faq-aside-inner {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .qa-q {
    font-size: 18px;
  }

  .page-faq .faq-contact-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 72px;
    align-items: start;
  }
}

@media (max-width: 560px) {
  .page-faq {
    --faq-indent: 18px;
  }

  .page-faq .faq-q::after,
  .page-faq .qa-q::after {
    right: 8px;
  }

  .page-faq .qa-q {
    padding-right: 36px;
  }

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

  .page-faq .faq-diagram {
    padding: 14px 12px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-q,
  .page-faq .faq-tablist .tab,
  .page-faq .faq-aside-link {
    transition: none;
  }
}