.page-faq {
  --faq-rail: 232px;
  --faq-gap: clamp(1.75rem, 4vw, 3rem);
  --faq-cut: 12px;
  background: var(--field-night);
  color: var(--warm-white);
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

.page-faq .faq-eyebrow {
  margin: 0 0 0.6rem;
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--neon-cyan);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 clamp(1.75rem, 5vw, 3rem);
  border-bottom: 1px solid var(--line-blue);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(115deg, rgba(56, 242, 210, 0.055) 0 1px, transparent 1px 22px);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.page-faq .faq-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 5.6vw, 3.5rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  max-width: 16em;
}

.page-faq .faq-hero__lead {
  margin: 0 0 1.4rem;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--mist-blue);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-faq .faq-hero__meta {
  align-self: start;
  padding: 1.1rem 1.2rem 1.2rem;
  border: 1px solid var(--line-blue);
  background: var(--stand-blue);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-hero__meta-title {
  margin: 0 0 0.85rem;
  font-family: var(--font-data);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist-blue);
}

.page-faq .faq-hero__stats {
  display: grid;
  gap: 0.55rem;
  margin: 0;
}

.page-faq .faq-hero__stats div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed rgba(42, 68, 103, 0.8);
}

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

.page-faq .faq-hero__stats dt {
  font-size: 0.82rem;
  color: var(--mist-blue);
}

.page-faq .faq-hero__stats dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 1rem;
  color: var(--neon-cyan);
  text-align: right;
}

/* ---------- 主布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  padding-top: clamp(1.5rem, 4vw, 2.75rem);
}

.page-faq .faq-rail__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-data);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist-blue);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 0.4rem;
  margin: 0;
  padding: 0 0 0.4rem;
  overflow-x: auto;
  list-style: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  padding: 0.55rem 0.85rem 0.55rem 0.9rem;
  border: 1px solid var(--line-blue);
  color: var(--mist-blue);
  font-size: 0.92rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .faq-rail__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background-color var(--t-fast) var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--warm-white);
  background: var(--stand-blue);
  border-color: var(--line-blue);
}

.page-faq .faq-rail__link:hover::before,
.page-faq .faq-rail__link:focus-visible::before {
  background: var(--neon-cyan);
}

.page-faq .faq-rail__link--current {
  color: var(--neon-cyan);
  border-color: rgba(56, 242, 210, 0.4);
}

.page-faq .faq-rail__link--current::before {
  background: var(--neon-cyan);
}

.page-faq .faq-rail__num {
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  opacity: 0.85;
}

/* ---------- 问答组 ---------- */
.page-faq .faq-group,
.page-faq .faq-fields,
.page-faq .faq-flow,
.page-faq .faq-help {
  scroll-margin-top: 7rem;
}

.page-faq .faq-group {
  margin-top: clamp(2.25rem, 5vw, 3.25rem);
  padding-top: clamp(1.1rem, 3vw, 1.6rem);
  border-top: 1px solid var(--line-blue);
}

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

.page-faq .faq-group__title,
.page-faq .faq-flow__title,
.page-faq .faq-fields__title,
.page-faq .faq-help__title {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.4vw, 1.95rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.page-faq .faq-group__lead,
.page-faq .faq-flow__lead,
.page-faq .faq-help__lead {
  margin: 0 0 1.25rem;
  max-width: 36em;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--mist-blue);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  margin-bottom: 0.6rem;
  border: 1px solid var(--line-blue);
  background: var(--stand-blue);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: background-color var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease);
}

.page-faq .qa:hover {
  border-color: rgba(56, 242, 210, 0.35);
}

.page-faq .qa[open] {
  background: var(--panel-blue);
  border-color: rgba(56, 242, 210, 0.45);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.95rem 1.05rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--warm-white);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--neon-cyan);
  outline-offset: -2px;
}

.page-faq .qa__mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 1.4rem;
  height: 1.4rem;
  margin-top: 0.1rem;
  border: 1px solid var(--line-blue);
  color: var(--neon-cyan);
  font-family: var(--font-data);
  font-size: 0.85rem;
  line-height: 1;
  transition: transform var(--t-mid) var(--ease), background-color var(--t-mid) var(--ease), color var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease);
}

.page-faq .qa[open] .qa__mark {
  transform: rotate(45deg);
  background: var(--neon-cyan);
  border-color: var(--neon-cyan);
  color: var(--field-night);
}

.page-faq .qa__a {
  padding: 0 1.05rem 1.1rem;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--warm-white);
}

.page-faq .qa__a p {
  margin: 0 0 0.65em;
}

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

.page-faq .qa__a a {
  color: var(--neon-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 210, 0.5);
  transition: border-color var(--t-fast) var(--ease);
}

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

.page-faq .qa__path {
  font-family: var(--font-data);
  font-size: 0.85em;
  padding: 0.1em 0.4em;
  color: var(--neon-cyan);
  background: rgba(56, 242, 210, 0.1);
}

/* ---------- 排查流程 ---------- */
.page-faq .faq-flow {
  margin-top: clamp(2.25rem, 5vw, 3.25rem);
  padding-top: clamp(1.1rem, 3vw, 1.6rem);
  border-top: 1px solid var(--line-blue);
}

.page-faq .faq-flow__media {
  margin: 0 0 1.2rem;
  border: 1px solid var(--line-blue);
  background: var(--stand-blue);
  overflow: hidden;
}

.page-faq .faq-flow__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: 280px;
  object-fit: cover;
}

.page-faq .faq-flow__scroll {
  overflow-x: auto;
  padding-bottom: 0.4rem;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-flow__svg {
  display: block;
  width: 100%;
  min-width: 620px;
  height: auto;
}

.page-faq .faq-flow__line {
  stroke: var(--neon-cyan);
  stroke-width: 1.5;
  stroke-dasharray: 5 4;
}

.page-faq .faq-flow__dot {
  fill: var(--signal-orange);
}

.page-faq .faq-flow__node {
  fill: var(--panel-blue);
  stroke: var(--line-blue);
  stroke-width: 1.5;
}

.page-faq .faq-flow__step {
  font-family: var(--font-data);
  font-size: 13px;
  fill: var(--neon-cyan);
  letter-spacing: 0.08em;
}

.page-faq .faq-flow__label {
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  fill: var(--warm-white);
}

.page-faq .faq-flow__note {
  margin: 0.9rem 0 0;
  padding-left: 0.9rem;
  border-left: 2px solid var(--signal-orange);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist-blue);
}

/* ---------- 字段说明 ---------- */
.page-faq .faq-fields {
  margin-top: clamp(2.25rem, 5vw, 3.25rem);
  padding-top: clamp(1.1rem, 3vw, 1.6rem);
  border-top: 1px solid var(--line-blue);
}

.page-faq .faq-fields__list {
  margin: 0.35rem 0 0;
  border-top: 1px solid var(--line-blue);
}

.page-faq .faq-fields__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.2rem;
  padding: 0.85rem 0.4rem 0.85rem 0.6rem;
  border-bottom: 1px solid var(--line-blue);
  border-left: 2px solid transparent;
  transition: background-color var(--t-fast) var(--ease), border-left-color var(--t-fast) var(--ease);
}

.page-faq .faq-fields__row:hover {
  background: var(--stand-blue);
  border-left-color: var(--neon-cyan);
}

.page-faq .faq-fields__term {
  margin: 0;
  font-family: var(--font-data);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--mist-blue);
  transition: color var(--t-fast) var(--ease);
}

.page-faq .faq-fields__row:hover .faq-fields__term {
  color: var(--neon-cyan);
}

.page-faq .faq-fields__desc {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--warm-white);
}

/* ---------- 人工兜底 ---------- */
.page-faq .faq-help {
  position: relative;
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding: clamp(1.4rem, 4vw, 2.4rem);
  border: 1px solid var(--line-blue);
  background: var(--stand-blue);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-faq .faq-help__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.24;
  pointer-events: none;
}

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

.page-faq .faq-help__list {
  display: grid;
  gap: 0.45rem;
  margin: 0 0 1.2rem;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--warm-white);
}

.page-faq .faq-help__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--signal-orange);
}

.page-faq .faq-template {
  margin: 0 0 1.3rem;
  border: 1px dashed var(--line-blue);
  background: rgba(6, 11, 20, 0.55);
}

.page-faq .faq-template summary {
  padding: 0.7rem 0.9rem;
  font-family: var(--font-data);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  color: var(--neon-cyan);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-template summary:focus-visible {
  outline: 2px solid var(--neon-cyan);
  outline-offset: -2px;
}

.page-faq .faq-template pre {
  margin: 0;
  padding: 0 0.9rem 0.9rem;
  font-family: var(--font-data);
  font-size: 0.8rem;
  line-height: 1.9;
  color: var(--mist-blue);
  white-space: pre-wrap;
  word-break: break-word;
}

.page-faq .faq-help__contact {
  display: grid;
  gap: 0.5rem;
  margin: 0 0 1.3rem;
}

.page-faq .faq-help__contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.7rem;
  margin: 0;
  font-size: 0.9rem;
}

.page-faq .faq-help__contact-label {
  min-width: 4.5rem;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mist-blue);
}

.page-faq .faq-help__contact-line .mono {
  color: var(--warm-white);
  word-break: break-all;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.9fr);
    align-items: start;
    gap: 2rem;
  }

  .page-faq .faq-fields__row {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    gap: 1.5rem;
    align-items: baseline;
  }

  .page-faq .faq-help__contact-line {
    font-size: 0.95rem;
  }
}

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

  .page-faq .faq-rail__inner,
  .page-faq .faq-rail {
    position: sticky;
    top: 7.5rem;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0.15rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    border-color: transparent;
    white-space: normal;
  }

  .page-faq .faq-rail__link::before {
    top: 0.35rem;
    bottom: 0.35rem;
    width: 2px;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-color: transparent;
  }

  .page-faq .faq-rail__link--current {
    border-color: transparent;
  }

  .page-faq .faq-flow__media img {
    max-height: 320px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__mark,
  .page-faq .qa__q,
  .page-faq .faq-rail__link,
  .page-faq .faq-rail__link::before,
  .page-faq .faq-fields__row,
  .page-faq .qa__a a {
    transition: none;
  }
}
<<<END>>>