.page-faq {
  --qa-num-w: 4.4rem;
  --qa-gap: 0.9rem;
  --qa-text-x: calc(var(--qa-num-w) + var(--qa-gap));
  --faq-surface: linear-gradient(150deg, rgba(22, 48, 79, 0.9) 0%, rgba(7, 19, 34, 0.94) 100%);
  --faq-cyan-soft: rgba(47, 227, 210, 0.08);
  --faq-cyan-line: rgba(47, 227, 210, 0.32);
  padding-bottom: clamp(48px, 9vw, 110px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(24px, 4.5vw, 48px);
}

.page-faq .breadcrumb__current {
  color: var(--text-mute);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(20px, 3.5vw, 34px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero__title {
  margin: 0.75rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 5.6vw, 3.35rem);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.028em;
  color: var(--white);
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--cyan);
}

.page-faq .faq-hero__rule {
  width: 72px;
  height: 2px;
  margin: clamp(18px, 3vw, 26px) 0 0;
  border: 0;
  background: linear-gradient(90deg, var(--cyan), rgba(47, 227, 210, 0));
}

.page-faq .faq-hero__lead {
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  max-width: 48ch;
  font-size: clamp(0.97rem, 1.5vw, 1.05rem);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-hero__quick {
  padding: clamp(16px, 2.4vw, 22px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--faq-surface);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-quick {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-faq .faq-quick a {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  gap: 0.6rem;
  align-items: baseline;
  padding: 0.62rem 0.75rem;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.92rem;
  line-height: 1.6;
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease), color 0.24s var(--ease);
}

.page-faq .faq-quick a:hover,
.page-faq .faq-quick a:focus-visible {
  border-color: var(--faq-cyan-line);
  background: var(--faq-cyan-soft);
  color: var(--white);
}

.page-faq .faq-quick__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--amber);
}

/* ---------- 数据带 ---------- */
.page-faq .faq-strip {
  margin-top: clamp(28px, 5vw, 54px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* ---------- 筛选与问答流 ---------- */
.page-faq .faq-flow {
  padding-top: clamp(30px, 5.5vw, 60px);
}

.page-faq .filter-status {
  margin: 0.7rem 0 0;
  min-height: 1.1em;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--text-mute);
}

.page-faq .panel-stack {
  margin-top: clamp(20px, 3vw, 32px);
}

.page-faq .panel__num {
  color: var(--amber);
}

.page-faq .qa-item.is-filtered-out {
  display: none;
}

/* ---------- 问答条目 ---------- */
.page-faq .qa-item {
  border-top: 1px solid var(--line-soft);
}

.page-faq .qa-item:last-of-type {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa-item__head {
  display: grid;
  grid-template-columns: var(--qa-num-w) minmax(0, 1fr) 1.5rem;
  align-items: baseline;
  gap: 0 var(--qa-gap);
  width: 100%;
  padding: 1.05rem 0;
  background: transparent;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-faq .qa-item__head:focus-visible {
  outline: 2px solid var(--mist);
  outline-offset: 4px;
  border-radius: 8px;
}

.page-faq .qa-item__num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.09em;
  color: var(--amber);
}

.page-faq .qa-item__q {
  font-family: var(--font-display);
  font-size: clamp(0.99rem, 2.4vw, 1.12rem);
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--white);
  transition: color 0.24s var(--ease);
}

.page-faq .qa-item__head:hover .qa-item__q {
  color: var(--mist);
}

.page-faq .qa-item__mark {
  position: relative;
  justify-self: end;
  align-self: center;
  width: 0.9rem;
  height: 0.9rem;
}

.page-faq .qa-item__mark::before,
.page-faq .qa-item__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  background: var(--cyan);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.page-faq .qa-item__mark::after {
  transform: rotate(90deg);
}

.page-faq .qa-item__head[aria-expanded="true"] .qa-item__mark::after {
  transform: rotate(0deg);
  opacity: 0;
}

.page-faq .qa-item__body {
  position: relative;
  padding: 0 0 1.6rem calc(var(--qa-text-x) + 1.05rem);
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .qa-item__body::before {
  content: "";
  position: absolute;
  left: calc(var(--qa-text-x) + 0.16rem);
  top: 0.1rem;
  bottom: 1.9rem;
  width: 2px;
  background: linear-gradient(180deg, var(--steel) 0%, transparent 100%);
}

.page-faq .qa-item__body > p {
  margin: 0 0 0.72rem;
}

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

.page-faq .qa-code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  letter-spacing: 0.04em;
  color: var(--mist);
}

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

.page-faq .qa-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-cyan-line);
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-faq .qa-link:hover,
.page-faq .qa-link:focus-visible {
  color: var(--mist);
  border-color: var(--mist);
}

.page-faq .qa-list {
  list-style: none;
  margin: 0.7rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.42rem;
}

.page-faq .qa-list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.92rem;
  line-height: 1.72;
}

.page-faq .qa-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--cyan);
}

/* ---------- 步骤流程 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0.95rem 0 0;
  padding: 0;
}

.page-faq .faq-step {
  position: relative;
  padding: 0 0 1.5rem 2.4rem;
}

.page-faq .faq-step:last-child {
  padding-bottom: 0.2rem;
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 0.4rem;
  top: 0.9rem;
  bottom: -0.15rem;
  width: 1px;
  background: var(--line);
}

.page-faq .faq-step:last-child::before {
  display: none;
}

.page-faq .faq-step::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0.34rem;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  border: 1.5px solid var(--cyan);
  background: var(--ink-deep);
}

.page-faq .faq-step__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-faq .faq-step__title {
  margin: 0.22rem 0 0.3rem;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-faq .faq-step__out {
  margin: 0.36rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--text-mute);
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: clamp(10px, 1.8vw, 16px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: linear-gradient(140deg, rgba(22, 48, 79, 0.72), rgba(7, 19, 34, 0.88));
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: calc(var(--radius-md) - 6px);
}

.page-faq .faq-figure figcaption {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--text-mute);
}

/* ---------- 尾部行动块 ---------- */
.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.5rem;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--faq-cyan-line);
  border-radius: var(--radius-md);
  background: var(--faq-cyan-soft);
}

.page-faq .faq-cta__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__quick {
    max-width: 30rem;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4.2fr);
    align-items: end;
  }

  .page-faq .faq-hero__quick {
    max-width: none;
  }
}

@media (min-width: 1000px) {
  .page-faq .panel-stack > .panel:nth-child(even) {
    margin-left: clamp(0px, 2.2vw, 38px);
  }

  .page-faq .panel-stack > .panel:nth-child(odd) {
    margin-right: clamp(0px, 2.2vw, 38px);
  }
}

@media (max-width: 559px) {
  .page-faq {
    --qa-num-w: 3.1rem;
    --qa-gap: 0.5rem;
  }

  .page-faq .qa-item__body {
    padding-right: 0;
  }

  .page-faq .qa-item__num {
    font-size: 0.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-item__mark::before,
  .page-faq .qa-item__mark::after,
  .page-faq .qa-item__q,
  .page-faq .qa-link {
    transition: none;
  }
}
<<<END>>>