.page-faq {
  --faq-rail: 176px;
  --faq-gap: 26px;
  padding-bottom: 76px;
}

.page-faq .faq-crumb {
  padding-top: 22px;
}

/* 首屏 */
.page-faq .faq-hero {
  padding: 26px 0 40px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 7.6vw, 62px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  max-width: 20ch;
}

.page-faq .faq-lead {
  margin: 18px 0 0;
  max-width: 56ch;
  color: var(--silver);
  font-size: 16.5px;
  line-height: 1.75;
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

/* 快速入口 */
.page-faq .faq-quick-wrap {
  padding-top: 40px;
}

.page-faq .faq-quick__head h2 {
  margin: 0;
  font-size: clamp(21px, 4.6vw, 30px);
  letter-spacing: -0.02em;
}

.page-faq .faq-quick__head p {
  margin: 8px 0 0;
  color: var(--silver);
  font-size: 14.5px;
}

.page-faq .faq-quick {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 20px;
}

.page-faq .faq-quick__item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 14px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-faq .faq-quick__item:hover,
.page-faq .faq-quick__item:focus-visible {
  border-color: var(--flame);
  transform: translateY(-2px);
}

.page-faq .faq-quick__num {
  flex: none;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--flame);
}

.page-faq .faq-quick__label {
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.4;
}

.page-faq .faq-quick__figure {
  margin: 24px 0 0;
}

/* 主体布局 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  margin-top: 44px;
}

.page-faq .faq-rail {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-faq .faq-rail__label {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 10px 0 4px;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: var(--panel);
  color: var(--silver);
  font-size: 13.5px;
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-rail__link .num {
  font-size: 11px;
  color: var(--flame);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--cream);
  border-color: var(--line-2);
}

/* 章节 */
.page-faq .faq-sec {
  scroll-margin-top: calc(var(--bar) + 26px);
  border-top: 1px solid var(--line);
  padding-bottom: 6px;
}

.page-faq .faq-sec + .faq-sec {
  margin-top: 34px;
}

.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 20px 0 4px;
}

.page-faq .faq-sec__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--flame);
}

.page-faq .faq-sec h2 {
  margin: 0;
  font-size: clamp(21px, 4.6vw, 31px);
  letter-spacing: -0.02em;
}

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

.page-faq .qa summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 17px 0;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
  transition: color 0.18s var(--ease);
}

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

.page-faq .qa summary:hover {
  color: var(--cyan);
}

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

.page-faq .qa summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1;
  color: var(--flame);
}

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

.page-faq .qa__body {
  padding: 0 0 18px;
  color: var(--silver);
  font-size: 15px;
  line-height: 1.74;
}

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

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

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

/* 步骤 */
.page-faq .steps {
  list-style: none;
  counter-reset: faqstep;
  display: grid;
  gap: 10px;
  margin: 12px 0 0;
  padding: 0;
}

.page-faq .steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
}

.page-faq .steps li::before {
  content: counter(faqstep) ".";
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--flame);
}

/* 指标流 */
.page-faq .metric-flow {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-faq .metric-flow li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  padding: 11px 0;
  border-top: 1px dashed var(--line);
}

.page-faq .metric-flow li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .metric-flow__idx {
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.9;
  color: var(--cyan);
}

.page-faq .metric-flow strong {
  color: var(--text);
  font-weight: 600;
}

/* 更新节奏 */
.page-faq .cadence {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.page-faq .cadence__cell {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--rock);
}

.page-faq .cadence__num {
  margin: 0;
  font-family: var(--mono);
  font-size: 30px;
  line-height: 1;
  color: var(--flame);
}

.page-faq .cadence__label {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--silver);
}

/* 移动端图文 */
.page-faq .faq-mobile-split {
  display: grid;
  gap: 20px;
}

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

/* 联系方式 */
.page-faq .faq-contact {
  position: relative;
  margin-top: 4px;
  padding: 16px 18px 16px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--panel);
  overflow: hidden;
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--flame);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact__row:first-child {
  padding-top: 0;
}

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

.page-faq .faq-contact__label {
  min-width: 64px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--silver);
}

.page-faq .faq-contact__value {
  font-family: var(--mono);
  font-size: 16px;
  color: var(--cream);
  word-break: break-all;
}

@media (min-width: 600px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-faq .cadence {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-contact__value {
    font-size: 17px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar) + 28px);
    border-top: 1px solid var(--line);
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    white-space: normal;
    border-color: transparent;
    background: transparent;
    border-radius: var(--r-sm);
    padding: 9px 10px;
  }

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

  .page-faq .faq-sec + .faq-sec {
    margin-top: 42px;
  }

  .page-faq .qa summary {
    font-size: 16.5px;
    padding: 19px 0;
  }

  .page-faq .qa__body {
    font-size: 15.5px;
    max-width: 72ch;
  }

  .page-faq .faq-mobile-split {
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: 34px;
    align-items: start;
  }

  .page-faq .faq-mobile__figure {
    margin-top: 16px;
  }
}

@media (min-width: 1200px) {
  .page-faq {
    --faq-rail: 200px;
  }

  .page-faq .faq-hero {
    padding: 34px 0 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__item,
  .page-faq .qa summary {
    transition: none;
  }

  .page-faq .faq-quick__item:hover {
    transform: none;
  }
}
<<<END>>>