.page-faq {
  background: var(--indigo);
  color: var(--star);
  position: relative;
}

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 36px 0 52px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -45%;
  right: -20%;
  width: 78vw;
  height: 78vw;
  max-width: 880px;
  max-height: 880px;
  background:
    radial-gradient(circle at 55% 48%, rgba(53, 230, 210, 0.14), transparent 62%),
    radial-gradient(circle at 80% 22%, rgba(255, 46, 139, 0.10), transparent 56%);
  pointer-events: none;
}

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

.page-faq .faq-eyebrow {
  margin: 20px 0 0;
  font-family: var(--mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .faq-h1 {
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(30px, 6vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 22ch;
  color: var(--star);
}

.page-faq .faq-lede {
  margin: 18px 0 0;
  max-width: 640px;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: rgba(244, 247, 251, 0.8);
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  list-style: none;
  margin: 30px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-hero-stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-stat-num {
  font-family: var(--mono);
  font-size: var(--fs-20);
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-faq .faq-stat-lbl {
  font-size: var(--fs-13);
  color: var(--rock);
}

/* 主体两栏 */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  padding-top: 40px;
  padding-bottom: 72px;
}

/* 左侧场景索引 */
.page-faq .faq-side-title {
  font-family: var(--mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--rock);
  margin: 0 0 12px;
}

.page-faq .faq-side-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-side-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  color: var(--star);
  text-decoration: none;
  font-size: var(--fs-13);
  white-space: nowrap;
  transition: border-color 220ms var(--ease), color 220ms var(--ease);
}

.page-faq .faq-side-list a:hover {
  border-color: var(--line-cyan);
  color: var(--cyan);
}

.page-faq .faq-side-no {
  font-family: var(--mono);
  font-size: var(--fs-12);
  color: var(--rock);
}

/* 右侧问答流 */
.page-faq .faq-section {
  padding: 0 0 48px;
  margin: 0 0 48px;
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: 104px;
}

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

.page-faq .faq-sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 16px;
}

.page-faq .faq-sec-no {
  font-family: var(--mono);
  font-size: var(--fs-12);
  color: var(--cyan);
  letter-spacing: 0.08em;
  border: 1px solid var(--line-cyan);
  padding: 3px 8px;
  flex-shrink: 0;
}

.page-faq .faq-sec-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(21px, 3.4vw, 28px);
  line-height: 1.3;
  margin: 0;
  color: var(--star);
}

.page-faq .faq-intro {
  max-width: 680px;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: rgba(244, 247, 251, 0.8);
  margin: 0 0 26px;
}

/* 图片 */
.page-faq .faq-figure {
  margin: 0 0 26px;
  padding: 10px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(22, 32, 74, 0.7), rgba(11, 18, 48, 0.55));
}

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

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--rock);
}

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

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

.page-faq .faq-item > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  position: relative;
  padding: 16px 34px 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-16);
  line-height: 1.62;
  color: var(--star);
  transition: color 200ms var(--ease);
}

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

.page-faq .faq-item > summary:hover,
.page-faq .faq-item[open] > summary {
  color: var(--cyan);
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 14px;
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
}

.page-faq .faq-q-no {
  font-family: var(--mono);
  font-size: var(--fs-12);
  color: var(--rock);
  flex-shrink: 0;
  min-width: 2.4em;
  padding-top: 3px;
}

.page-faq .faq-q-text {
  flex: 1;
  min-width: 0;
}

.page-faq .faq-a {
  margin: 0 0 20px 6px;
  padding: 4px 0 4px 18px;
  border-left: 1px solid var(--line-cyan);
  max-width: 660px;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(244, 247, 251, 0.78);
}

.page-faq .faq-a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 230, 210, 0.36);
  transition: border-color 200ms var(--ease);
}

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

/* 步骤 */
.page-faq .faq-steps {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  counter-reset: faq-step;
}

.page-faq .faq-steps > li {
  position: relative;
  counter-increment: faq-step;
  padding: 0 0 16px 36px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 247, 251, 0.82);
}

.page-faq .faq-steps > li::before {
  content: counter(faq-step);
  position: absolute;
  left: 0;
  top: 2px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  background: var(--indigo-step);
  border: 1px solid var(--line-cyan);
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 11px;
}

.page-faq .faq-steps > li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 11px;
  top: 28px;
  bottom: 4px;
  width: 1px;
  background: var(--line-soft);
}

.page-faq .faq-steps > li:last-child {
  padding-bottom: 0;
}

/* 反馈提示块 */
.page-faq .faq-note {
  margin: 0 0 26px;
  padding: 20px 20px 18px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--magenta);
  background: linear-gradient(180deg, rgba(22, 32, 74, 0.72), rgba(11, 18, 48, 0.5));
  max-width: 680px;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(244, 247, 251, 0.82);
}

.page-faq .faq-note p {
  margin: 0 0 12px;
}

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

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

.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}

.page-faq .faq-urgent {
  max-width: 680px;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--rock);
}

.page-faq .faq-mail {
  font-family: var(--mono);
  font-size: var(--fs-13);
  color: var(--star);
}

/* 中等屏 */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 52px 0 64px;
  }
  .page-faq .faq-a {
    margin-left: 34px;
  }
}

/* 桌面端左右分屏 */
@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 56px;
    padding-top: 64px;
    padding-bottom: 96px;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-faq .faq-side-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-side-list li + li {
    margin-top: 2px;
  }

  .page-faq .faq-side-list a {
    display: flex;
    width: 100%;
    border: 0;
    border-left: 1px solid var(--line);
    padding: 10px 0 10px 16px;
    transition: border-color 220ms var(--ease), color 220ms var(--ease);
  }

  .page-faq .faq-side-list a:hover {
    border-left-color: var(--cyan);
  }

  .page-faq .faq-figure--index {
    max-width: 720px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-body {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 72px;
  }
}
<<<END>>>