.page-faq {
  --faq-rail: 236px;
  --faq-gap: 56px;
  --faq-line: rgba(168, 134, 60, .36);
  --faq-soft: rgba(198, 190, 177, .16);
  display: block;
  background: var(--ink-900);
  color: var(--paper-light);
  overflow-x: clip;
}

.page-faq__crumb {
  padding-top: 26px;
}

/* ---------- 首屏 ---------- */

.page-faq__hero {
  position: relative;
  padding: 34px 0 60px;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 16px;
  background-image: repeating-linear-gradient(to right, var(--faq-line) 0 1px, transparent 1px 26px);
  opacity: .75;
  pointer-events: none;
}

.page-faq__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(46px, 8.6vw, 100px);
  line-height: .96;
  letter-spacing: -.015em;
  margin: 16px 0 0;
  color: var(--paper-light);
}

.page-faq__title::after {
  content: "";
  display: block;
  width: 76px;
  height: 2px;
  margin-top: 22px;
  background: var(--gold-400);
}

.page-faq__lede {
  max-width: 620px;
  margin: 24px 0 0;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--warm-mid);
}

.page-faq__facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  max-width: 660px;
}

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

.page-faq__fact-num {
  display: block;
  font-size: 26px;
  line-height: 1.1;
  color: var(--gold-400);
}

.page-faq__fact-label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--note-blue);
}

@media (min-width: 560px) {
  .page-faq__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px 22px;
  }
}

/* ---------- 目录 + 答案流 ---------- */

.page-faq__shell {
  padding-bottom: 76px;
}

.page-faq__rail {
  margin-bottom: 44px;
}

.page-faq__rail-title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--note-blue);
  margin: 0 0 14px;
}

.page-faq__index {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq__index-item + .page-faq__index-item {
  margin-top: 2px;
}

.page-faq__index-link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  padding: 9px 8px 9px 14px;
  border-left: 1px solid var(--faq-line);
  font-size: 14px;
  line-height: 1.5;
  color: var(--warm-mid);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-left-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq__index-link:hover,
.page-faq__index-link:focus-visible {
  color: var(--gold-400);
  border-left-color: var(--gold-700);
  background: rgba(216, 176, 99, .06);
}

.page-faq__index-link.is-active,
.page-faq__index-link[aria-current] {
  color: var(--gold-400);
  border-left-color: var(--jade);
  font-weight: 600;
}

.page-faq__index-num {
  font-size: 12px;
  color: var(--note-blue);
}

@media (min-width: 1000px) {
  .page-faq__shell {
    display: grid;
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    column-gap: var(--faq-gap);
    align-items: start;
    padding-bottom: 112px;
  }

  .page-faq__rail {
    position: sticky;
    top: 84px;
    margin-bottom: 0;
  }
}

/* ---------- 区块 ---------- */

.page-faq__group {
  padding: 0 0 54px;
  scroll-margin-top: 88px;
}

.page-faq__group:last-child {
  padding-bottom: 12px;
}

.page-faq__group-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 36px);
  line-height: 1.16;
  letter-spacing: -.01em;
  margin: 14px 0 0;
  color: var(--paper-light);
}

.page-faq__group-lede {
  max-width: 640px;
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--warm-mid);
}

.page-faq__body {
  max-width: 640px;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--warm-mid);
}

.page-faq__note {
  max-width: 660px;
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--note-blue);
}

.page-faq__link {
  display: inline-block;
  margin-top: 12px;
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--gold-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(216, 176, 99, .45);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-bottom-color var(--dur) var(--ease);
}

.page-faq__link:hover,
.page-faq__link:focus-visible {
  color: var(--jade);
  border-bottom-color: var(--jade);
}

.page-faq__note .page-faq__link {
  margin-top: 0;
  font-size: 12.5px;
}

/* ---------- 三步 ---------- */

.page-faq__steps {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq__step {
  padding: 20px 0 22px;
  border-bottom: 1px solid var(--faq-soft);
}

.page-faq__step-num {
  display: block;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold-700);
}

.page-faq__step-title {
  margin: 9px 0 0;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--paper-light);
}

.page-faq__step-text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--warm-mid);
}

@media (min-width: 780px) {
  .page-faq__steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 34px;
  }

  .page-faq__step {
    border-bottom: none;
    padding: 20px 0 6px;
  }
}

/* ---------- 图 ---------- */

.page-faq__figure {
  margin: 28px 0 30px;
}

.page-faq__figure .figure__caption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--note-blue);
}

/* ---------- 问答折叠 ---------- */

.page-faq__q {
  border-top: 1px solid var(--faq-soft);
}

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

.page-faq__q summary {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) 22px;
  gap: 10px;
  align-items: baseline;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  line-height: 1.55;
  color: var(--paper-light);
  transition: color var(--dur) var(--ease);
}

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

.page-faq__q summary::marker {
  content: "";
}

.page-faq__q summary::after {
  content: "＋";
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--gold-700);
}

.page-faq__q summary:hover,
.page-faq__q summary:focus-visible {
  color: var(--gold-400);
}

.page-faq__q[open] summary::after {
  content: "－";
  color: var(--jade);
}

.page-faq__q-num {
  font-size: 12px;
  color: var(--note-blue);
}

.page-faq__a {
  padding: 0 22px 24px 42px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--warm-mid);
  animation: page-faq-fade 160ms var(--ease);
}

.page-faq__a p {
  margin: 0;
  max-width: 620px;
}

.page-faq__a p + p {
  margin-top: 10px;
}

@keyframes page-faq-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- 释义术语 ---------- */

.page-faq .term {
  position: relative;
  border-bottom: 1px dashed var(--gold-700);
  cursor: help;
}

.page-faq .term::after {
  content: attr(data-def);
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  z-index: 6;
  width: max-content;
  max-width: min(260px, 72vw);
  padding: 10px 12px;
  background: var(--ink-800);
  border: 1px solid var(--gold-700);
  color: var(--paper-light);
  font-family: var(--font-body);
  font-size: 12.5px;
  line-height: 1.65;
  letter-spacing: 0;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 160ms var(--ease), transform 160ms var(--ease), visibility 160ms;
  pointer-events: none;
}

.page-faq .term:hover::after,
.page-faq .term:focus-visible::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 名词释义表 ---------- */

.page-faq__terms {
  margin: 26px 0 6px;
  padding: 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq__term-row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--faq-soft);
}

.page-faq__term-name {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--gold-400);
}

.page-faq__term-def {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--warm-mid);
}

@media (min-width: 720px) {
  .page-faq__term-row {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }
}

/* ---------- 提问准备 ---------- */

.page-faq__checklist {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 13px;
  max-width: 660px;
}

.page-faq__checklist li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--warm-mid);
}

.page-faq__checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66em;
  width: 8px;
  height: 8px;
  border: 1px solid var(--jade);
  transform: rotate(45deg);
}

.page-faq__contact {
  margin: 24px 0 0;
  padding: 18px 20px;
  border: 1px solid var(--faq-line);
}

.page-faq__contact .contact-list__label {
  color: var(--note-blue);
}

.page-faq__contact .contact-list__value {
  color: var(--paper-light);
}

/* ---------- 纸底区块 ---------- */

.page-faq__group--paper {
  background: var(--paper);
  color: var(--ink-900);
  padding: 30px clamp(18px, 3.4vw, 40px) 34px;
  border-radius: var(--r);
}

.page-faq__group--paper .page-faq__group-title {
  color: var(--ink-900);
}

.page-faq__group--paper .page-faq__group-lede,
.page-faq__group--paper .page-faq__body {
  color: #4A5468;
}

.page-faq__group--paper .page-faq__q {
  border-top-color: rgba(14, 23, 48, .16);
}

.page-faq__group--paper .page-faq__q:last-of-type {
  border-bottom-color: rgba(14, 23, 48, .16);
}

.page-faq__group--paper .page-faq__q summary {
  color: var(--ink-900);
}

.page-faq__group--paper .page-faq__q summary:hover,
.page-faq__group--paper .page-faq__q summary:focus-visible {
  color: var(--gold-700);
}

.page-faq__group--paper .page-faq__q-num {
  color: #7A849C;
}

.page-faq__group--paper .page-faq__a {
  color: #3C465C;
}

.page-faq__group--paper .page-faq__figure .figure__caption {
  color: #5A6478;
}

.page-faq__group--paper .page-faq__link {
  color: var(--gold-700);
  border-bottom-color: rgba(168, 134, 60, .55);
}

.page-faq__group--paper .page-faq__link:hover,
.page-faq__group--paper .page-faq__link:focus-visible {
  color: var(--jade);
  border-bottom-color: var(--jade);
}

/* ---------- 双出口 ---------- */

.page-faq__exits {
  background: var(--ink-800);
  border-top: 1px solid var(--faq-line);
  padding: 48px 0 56px;
}

.page-faq__exit-grid {
  display: grid;
  gap: 14px;
}

@media (min-width: 780px) {
  .page-faq__exit-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
}

.page-faq__exit {
  display: block;
  padding: 26px 24px 28px;
  border: 1px solid var(--faq-line);
  background: rgba(14, 23, 48, .38);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq__exit:hover,
.page-faq__exit:focus-visible {
  border-color: var(--gold-400);
  background: rgba(216, 176, 99, .07);
}

.page-faq__exit-kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--jade);
}

.page-faq__exit-title {
  display: block;
  margin-top: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.2;
  color: var(--paper-light);
}

.page-faq__exit-text {
  display: block;
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--warm-mid);
}
<<<END>>>