.page-faq {
  --faq-card-pad: 18px;
  --faq-section-gap: clamp(48px, 7vw, 92px);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: clamp(20px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding-bottom: clamp(32px, 5vw, 56px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -14%;
  right: -24%;
  width: min(780px, 94vw);
  height: min(560px, 80vw);
  background: linear-gradient(
    140deg,
    rgba(63, 224, 208, 0.18),
    rgba(154, 107, 255, 0.12) 52%,
    rgba(10, 18, 32, 0) 78%
  );
  -webkit-clip-path: polygon(30% 0, 100% 0, 100% 74%, 0 100%);
  clip-path: polygon(30% 0, 100% 0, 100% 74%, 0 100%);
  z-index: -1;
  pointer-events: none;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 6.2vw, 62px);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: 0.06em;
  color: var(--paper);
  margin: 18px 0 0;
  max-width: 18ch;
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 34rem;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.9;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 28px;
  margin-top: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-hero__media {
  margin: 0;
}

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

.page-faq .faq-hero__index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--edge);
}

.page-faq .faq-hero__index li {
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-hero__link {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 6px;
  text-decoration: none;
  color: var(--paper);
  transition: background 200ms ease, padding-left 200ms ease;
}

.page-faq .faq-hero__link:hover,
.page-faq .faq-hero__link:focus-visible {
  background: rgba(63, 224, 208, 0.08);
  padding-left: 12px;
}

.page-faq .faq-hero__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-faq .faq-hero__label {
  display: block;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__hint {
  display: block;
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
  opacity: 0.62;
}

/* ---------- 吸顶分类条 ---------- */
.page-faq .faq-jump {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(10, 18, 32, 0.94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--edge);
}

.page-faq .faq-jump::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(63, 224, 208, 0) 62%);
  pointer-events: none;
}

.page-faq .faq-jump__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 11px;
  padding-bottom: 11px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.page-faq .faq-jump__title {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--mist);
  opacity: 0.72;
}

.page-faq .faq-jump__list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-jump__item a {
  display: inline-block;
  white-space: nowrap;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease;
}

.page-faq .faq-jump__item a:hover,
.page-faq .faq-jump__item a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-section {
  padding-top: var(--faq-section-gap);
  scroll-margin-top: 76px;
}

.page-faq .faq-section__head {
  max-width: 46rem;
  margin-top: 14px;
}

.page-faq .faq-section h2 {
  font-family: var(--font-display);
  font-size: clamp(23px, 3.4vw, 38px);
  font-weight: 500;
  line-height: 1.32;
  letter-spacing: 0.04em;
  color: var(--paper);
  margin: 12px 0 0;
}

.page-faq .faq-section__intro {
  margin: 14px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.9;
}

/* ---------- 问答卡 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 3.5vw, 40px);
}

.page-faq .faq-card {
  border: var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-hard-sm);
  transition: border-color 200ms ease;
}

.page-faq .faq-card:hover {
  border-color: rgba(63, 224, 208, 0.5);
}

.page-faq .faq-card[open] {
  border-color: rgba(63, 224, 208, 0.72);
}

.page-faq .faq-card__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 16px var(--faq-card-pad);
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.01em;
}

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

.page-faq .faq-card__q::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-card[open] .faq-card__q::after {
  content: "－";
}

.page-faq .faq-card__num {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 22px;
  padding: 0 7px;
  border: 1px solid var(--amber);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-faq .faq-card__a {
  padding: 14px var(--faq-card-pad) var(--faq-card-pad);
  border-top: 1px solid var(--edge);
}

.page-faq .faq-card__a > p {
  margin: 0;
  color: var(--mist);
  font-size: 14.5px;
  font-weight: 350;
  line-height: 1.9;
}

.page-faq .faq-card__more {
  display: inline-block;
  margin-top: 12px;
  padding-bottom: 2px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, 0.35);
}

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

/* ---------- 术语对照 ---------- */
.page-faq .faq-glossary {
  display: grid;
  gap: 28px;
  margin-top: clamp(22px, 3vw, 36px);
}

.page-faq .faq-glossary__table {
  overflow-x: auto;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-hard-sm);
}

.page-faq .faq-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-body);
}

.page-faq .faq-table__cap {
  caption-side: top;
  text-align: left;
  padding: 14px 16px 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
  opacity: 0.72;
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  text-align: left;
  padding: 12px 16px;
  vertical-align: top;
  border-bottom: 1px solid var(--edge);
  word-break: break-word;
}

.page-faq .faq-table thead th {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--mist);
  border-bottom: 1px solid rgba(63, 224, 208, 0.5);
  white-space: nowrap;
}

.page-faq .faq-table tbody tr:nth-child(odd) {
  background: rgba(43, 55, 70, 0.28);
}

.page-faq .faq-table tbody th {
  font-weight: 500;
  color: var(--paper);
  white-space: nowrap;
}

.page-faq .faq-table tbody td {
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-table tbody td:nth-child(1) {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--amber);
}

.page-faq .faq-glossary__media {
  margin: 0;
}

/* ---------- 三步排查 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 28px;
  margin-top: clamp(24px, 3.5vw, 40px);
}

.page-faq .faq-steps__diagram {
  border: var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-hard-sm);
  padding: clamp(16px, 3vw, 28px);
}

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

.page-faq .faq-steps__line {
  stroke: var(--edge);
  stroke-width: 2;
  stroke-dasharray: 7 7;
}

.page-faq .faq-steps__node {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-faq .faq-steps__node--mid {
  stroke: var(--violet);
}

.page-faq .faq-steps__num {
  fill: var(--paper);
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  text-anchor: middle;
}

.page-faq .faq-steps__cap {
  fill: var(--mist);
  font-family: var(--font-body);
  font-size: 15px;
  text-anchor: middle;
}

.page-faq .faq-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-faq .faq-steps__item {
  padding-left: 20px;
  border-left: 2px solid var(--clay);
}

.page-faq .faq-steps__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--amber);
}

.page-faq .faq-steps__item h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-steps__item p {
  margin: 8px 0 0;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.9;
}

/* ---------- 兜底 CTA ---------- */
.page-faq .faq-still {
  padding-bottom: clamp(56px, 9vw, 120px);
}

.page-faq .faq-cta {
  position: relative;
  border: var(--line);
  border-radius: var(--radius);
  background: linear-gradient(
    150deg,
    rgba(63, 224, 208, 0.09),
    rgba(154, 107, 255, 0.08) 58%,
    rgba(10, 18, 32, 0) 100%
  );
  box-shadow: var(--shadow-hard);
  padding: clamp(24px, 4.5vw, 52px);
}

.page-faq .faq-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 500;
  line-height: 1.34;
  letter-spacing: 0.04em;
  color: var(--paper);
  margin: 12px 0 0;
  max-width: 24ch;
}

.page-faq .faq-cta__lede {
  margin: 16px 0 0;
  max-width: 38rem;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.9;
}

.page-faq .faq-cta .btn-row {
  margin-top: 24px;
}

.page-faq .faq-cta__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--edge);
}

.page-faq .faq-cta__row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.page-faq .faq-cta__key {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--mist);
  opacity: 0.75;
}

.page-faq .faq-cta__val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .copy-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  background: transparent;
  border: 1px solid rgba(63, 224, 208, 0.4);
  border-radius: 2px;
  padding: 4px 9px;
  cursor: pointer;
  transition: color 160ms ease, background 160ms ease, border-color 160ms ease;
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  background: rgba(63, 224, 208, 0.12);
}

.page-faq .copy-btn.is-done {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-cta__note {
  margin: 18px 0 0;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--mist);
  opacity: 0.7;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 1fr);
    gap: 44px;
  }

  .page-faq .faq-glossary {
    grid-template-columns: minmax(0, 1.45fr) minmax(260px, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-steps {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-section {
    scroll-margin-top: 92px;
  }
}

@media (max-width: 420px) {
  .page-faq .faq-card__q {
    gap: 10px;
    padding: 14px 14px;
    font-size: 15px;
  }

  .page-faq .faq-card__a {
    padding: 12px 14px 16px;
  }

  .page-faq .faq-hero__link {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }
}
<<<END>>>