.page-faq {
  --faq-rule: 1px solid var(--line);
  --faq-gap: clamp(14px, 2vw, 26px);
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-faq .faq-container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: calc(var(--header-h) + 44px) clamp(40px, 6vw, 76px);
  background:
    radial-gradient(680px 420px at 10% 0%, rgba(25, 195, 125, 0.16), transparent 68%),
    radial-gradient(560px 380px at 94% 16%, rgba(46, 155, 255, 0.14), transparent 70%),
    var(--bg);
  border-bottom: var(--faq-rule);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 56px);
  align-items: end;
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(20px, 3vw, 34px);
  font-size: 13px;
  color: var(--muted);
}

.page-faq .breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s ease;
}

.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--green);
}

.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(34px, 6.2vw, 68px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--ink);
  max-width: 20ch;
}

.page-faq .faq-lede {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 56ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  padding: 9px 15px;
  border: var(--faq-rule);
  border-radius: 999px;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--green);
  background: rgba(25, 195, 125, 0.09);
  color: var(--ink);
}

.page-faq .faq-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: clamp(26px, 3.4vw, 40px) 0 0;
  padding-top: 18px;
  border-top: var(--faq-rule);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-stat dt {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-faq .faq-stat dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 5px;
}

.page-faq .faq-stat b {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
}

.page-faq .faq-stat dd span {
  font-size: 12px;
  color: var(--muted);
}

.page-faq .is-lime { color: var(--lime); }
.page-faq .is-alert { color: var(--alert); }
.page-faq .is-blue { color: var(--blue); }
.page-faq .is-green { color: var(--green); }

.page-faq .faq-hero-media {
  position: relative;
  margin: 0;
}

.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: var(--faq-rule);
  background: var(--panel);
}

.page-faq .faq-hero-media::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 64px;
  height: 64px;
  border-right: 1px solid var(--green);
  border-bottom: 1px solid var(--green);
  pointer-events: none;
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  padding-block: clamp(46px, 7vw, 88px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-rail {
  border-top: 2px solid var(--green);
  padding-top: 16px;
  min-width: 0;
}

.page-faq .faq-rail-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-rail-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 12px;
  border: var(--faq-rule);
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-rail-list a .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--blue);
}

.page-faq .faq-rail-list a:hover,
.page-faq .faq-rail-list a:focus-visible {
  border-color: var(--green);
  background: rgba(25, 195, 125, 0.08);
  color: var(--ink);
}

.page-faq .faq-rail-note {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  font-family: var(--font-mono);
}

.page-faq .faq-answers {
  display: flex;
  flex-direction: column;
  gap: clamp(38px, 5.5vw, 68px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-group-head {
  padding-bottom: 14px;
  border-bottom: var(--faq-rule);
}

.page-faq .faq-group-index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-faq .faq-group-head h2,
.page-faq .faq-contact-copy h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-group-desc {
  margin: 6px 0 0;
  max-width: 62ch;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 手风琴 ---------- */
.page-faq details.qa-item {
  border-bottom: var(--faq-rule);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq details.qa-item > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

.page-faq details.qa-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq details.qa-item > summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.page-faq .qa-num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}

.page-faq .qa-text {
  font-size: clamp(16px, 1.5vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  transition: color 0.18s ease;
}

.page-faq details.qa-item > summary:hover .qa-text {
  color: var(--green);
}

.page-faq .qa-mark {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 6px;
  flex: none;
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--green);
  transform: translate(-50%, -50%);
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.page-faq .qa-mark::before {
  width: 14px;
  height: 1.5px;
}

.page-faq .qa-mark::after {
  width: 1.5px;
  height: 14px;
}

.page-faq details.qa-item[open] > summary .qa-mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq details.qa-item[open] > summary .qa-text {
  color: var(--lime);
}

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

.page-faq .qa-a p {
  margin: 0;
  max-width: 68ch;
  padding: 14px 16px;
  border-left: 2px solid var(--green);
  background: var(--panel);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-faq .qa-a a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa-a a:hover,
.page-faq .qa-a a:focus-visible {
  color: var(--green);
}

/* ---------- 时间刻度图 ---------- */
.page-faq .faq-timeline-fig {
  margin: 18px 0 4px;
}

.page-faq .faq-timeline-fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: var(--faq-rule);
  background: var(--panel);
}

.page-faq .faq-timeline-fig figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact {
  scroll-margin-top: calc(var(--header-h) + 28px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  padding: clamp(26px, 3.6vw, 40px);
  border: var(--faq-rule);
  border-top: 3px solid var(--green);
  background:
    linear-gradient(180deg, rgba(25, 195, 125, 0.07), transparent 46%),
    var(--panel);
}

.page-faq .faq-contact-lede {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-faq .faq-contact-more {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-contact-more a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 155, 255, 0.45);
}

.page-faq .faq-contact-more a:hover,
.page-faq .faq-contact-more a:focus-visible {
  color: var(--green);
  border-bottom-color: var(--green);
}

.page-faq .faq-contact-card {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 4px 0 0;
  min-width: 0;
}

.page-faq .faq-contact-card .contact-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  padding: 12px 0;
  border-bottom: var(--faq-rule);
}

.page-faq .faq-contact-card .contact-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .faq-contact-card .contact-value {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact-card .contact-value.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.page-faq .faq-contact-note {
  margin: 16px 0 18px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-contact-btn {
  align-self: flex-start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-contact-card .contact-line {
    grid-template-columns: 92px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-faq .qa-a {
    padding-left: 42px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(200px, 3fr) minmax(0, 9fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-faq .faq-rail-list a {
    display: flex;
    border: 0;
    border-bottom: var(--faq-rule);
    padding: 10px 2px;
    background: none;
  }

  .page-faq .faq-rail-list a:hover,
  .page-faq .faq-rail-list a:focus-visible {
    color: var(--green);
    background: none;
    padding-left: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .qa-text,
  .page-faq .qa-mark::before,
  .page-faq .qa-mark::after,
  .page-faq .faq-rail-list a {
    transition: none;
  }
}
<<<END>>>