.page-faq {
  --faq-rail: 250px;
  --faq-gap: clamp(28px, 4vw, 64px);
  --faq-step-num: clamp(2.4rem, 4vw, 3.4rem);
  --faq-body: rgba(243, 234, 220, 0.88);
  --faq-soft: rgba(243, 234, 220, 0.7);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  padding-bottom: clamp(56px, 9vw, 104px);
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 18px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .breadcrumbs .text-link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

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

.page-faq .breadcrumb-sep {
  color: var(--graphite);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(ellipse at 78% 12%, rgba(255, 154, 77, 0.16), transparent 62%),
    linear-gradient(180deg, var(--panel), var(--ink));
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  padding-block: clamp(28px, 5vw, 56px) clamp(34px, 6vw, 72px);
}

.page-faq .faq-hero__lead h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 0.98;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lead .lede {
  max-width: 34em;
  margin-top: 18px;
  color: var(--faq-body);
  font-size: 16px;
  line-height: 1.85;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__side {
  padding: clamp(18px, 3vw, 26px);
  background: rgba(22, 24, 30, 0.72);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 10px;
  background: var(--ink);
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 500;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .faq-hero__side .note {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--faq-soft);
}

/* ---------- 三步流程 ---------- */

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

.page-faq .faq-steps .section-heading {
  max-width: 44em;
}

.page-faq .faq-steps .section-title {
  margin-top: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 2.6vw, 2.3rem);
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.page-faq .faq-figure {
  margin: clamp(24px, 4vw, 40px) 0 clamp(24px, 4vw, 36px);
}

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

.page-faq .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .faq-track {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-step {
  display: grid;
  gap: 10px;
  padding: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-step:first-child {
  border-top: 0;
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--faq-step-num);
  font-weight: 500;
  line-height: 0.85;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .faq-step__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-body);
}

.page-faq .faq-step__meta {
  margin: 6px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
  font-size: 13px;
  line-height: 1.75;
  color: var(--faq-soft);
}

.page-faq .faq-step__meta-label {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 8px;
  border: 1px solid rgba(25, 227, 168, 0.42);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 主体与右栏 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(32px, 5vw, 64px);
}

.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-block + .faq-block {
  margin-top: clamp(40px, 6vw, 76px);
  padding-top: clamp(32px, 5vw, 56px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 8px 16px;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .faq-block__head .eyebrow {
  grid-column: 1 / -1;
}

.page-faq .faq-block__head .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 2.3vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-block__count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  white-space: nowrap;
}

/* ---------- 问答折叠 ---------- */

.page-faq .qa-list {
  border-top: 1px solid var(--line-strong);
}

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

.page-faq .qa__q {
  display: grid;
  grid-template-columns: 2.2em minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding: 15px 4px 15px 0;
  cursor: pointer;
  list-style: none;
  transition: background-color 200ms var(--ease);
}

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

.page-faq .qa__q:hover {
  background: rgba(255, 216, 192, 0.05);
}

.page-faq .qa__idx {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--graphite);
}

.page-faq .qa__text {
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .qa__arrow {
  align-self: center;
  width: 8px;
  height: 8px;
  margin-right: 4px;
  border-right: 1.5px solid var(--ember);
  border-bottom: 1.5px solid var(--ember);
  transform: rotate(-45deg);
  transition: transform 200ms var(--ease);
}

.page-faq .qa[open] .qa__arrow {
  transform: rotate(45deg);
}

.page-faq .qa[open] .qa__idx {
  color: var(--cyan);
}

.page-faq .qa[open] .qa__text {
  color: var(--peach);
}

.page-faq .qa__a {
  padding: 0 0 20px 2.2em;
}

.page-faq .qa__a p {
  max-width: 34em;
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--faq-body);
}

/* ---------- 兼容性表格 ---------- */

.page-faq .compat-wrap {
  margin-top: 18px;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .compat {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .compat__caption {
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  border-bottom: 1px solid var(--line);
}

.page-faq .compat thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 10px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--mist);
  background: var(--ink);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .compat tbody tr:nth-child(even) {
  background: rgba(243, 234, 220, 0.035);
}

.page-faq .compat tbody th,
.page-faq .compat tbody td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  line-height: 1.65;
  border-bottom: 1px solid var(--line);
}

.page-faq .compat tbody th {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--paper);
  white-space: nowrap;
}

.page-faq .compat tbody td {
  color: var(--faq-body);
}

.page-faq .compat tbody tr:last-child th,
.page-faq .compat tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .compat__note {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--faq-soft);
}

.page-faq .compat__note .text-link {
  color: var(--ember);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 90, 31, 0.5);
}

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

/* ---------- 右栏 ---------- */

.page-faq .faq-rail {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-faq .faq-rail__block {
  display: grid;
  gap: 2px;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(22, 24, 30, 0.62);
}

.page-faq .faq-rail__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: 2em minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  padding: 8px 6px;
  border-left: 2px solid transparent;
  font-size: 14px;
  color: var(--faq-soft);
  text-decoration: none;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-faq .faq-rail__link:hover {
  color: var(--paper);
  background: rgba(255, 216, 192, 0.06);
}

.page-faq .faq-rail__link[aria-current="location"] {
  border-left-color: var(--ember);
  color: var(--paper);
  background: rgba(255, 90, 31, 0.1);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--graphite);
}

.page-faq .faq-rail__link[aria-current="location"] .faq-rail__num {
  color: var(--cyan);
}

.page-faq .faq-rail__count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--graphite);
}

.page-faq .faq-rail__extra {
  gap: 0;
}

.page-faq .faq-rail__extralink {
  display: block;
  padding: 9px 6px;
  font-size: 14px;
  color: var(--faq-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 200ms var(--ease), padding-left 200ms var(--ease);
}

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

.page-faq .faq-rail__extralink:hover {
  color: var(--ember);
  padding-left: 12px;
}

/* ---------- 中等宽度 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .qa__q {
    padding-block: 17px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-step {
    border-top: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-step:first-child {
    border-left: 0;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) var(--faq-rail);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .qa__a {
    padding-left: calc(2.2em + 12px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__arrow,
  .page-faq .qa__q,
  .page-faq .faq-rail__link,
  .page-faq .faq-rail__extralink {
    transition: none;
  }
}
<<<END>>>