.page-faq {
  --faq-toc-w: 236px;
  --faq-gap: clamp(1.75rem, 4vw, 4rem);
  --faq-pad: clamp(2rem, 6vw, 4.5rem);
  color: var(--paper);
  padding-bottom: clamp(4rem, 10vw, 7rem);
  overflow-x: hidden;
}

/* 面包屑 */
.page-faq .faq-crumbs {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 1.1rem var(--gutter) 0;
}
.page-faq .faq-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.page-faq .faq-crumbs li + li::before {
  content: "/";
  margin-right: 0.6rem;
  color: var(--line);
}
.page-faq .faq-crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-faq .faq-crumbs a:hover,
.page-faq .faq-crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-faq .faq-crumbs [aria-current="page"] { color: var(--paper); }

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(2.25rem, 6vw, 4.5rem) var(--gutter) clamp(2rem, 5vw, 3.5rem);
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(115% 90% at 4% -10%, rgba(63, 232, 196, 0.17), transparent 60%),
    radial-gradient(70% 70% at 100% 10%, rgba(255, 138, 60, 0.08), transparent 68%);
  pointer-events: none;
}
.page-faq .faq-hero h1 {
  font-size: clamp(2rem, 7vw, 3.9rem);
  line-height: 1.08;
  letter-spacing: 0.03em;
  font-weight: 900;
  margin: 0.7rem 0 1.15rem;
  max-width: 15ch;
}
.page-faq .faq-hero .lede {
  max-width: 34em;
  color: var(--muted);
  font-size: clamp(0.9375rem, 1.6vw, 1.0625rem);
  line-height: 1.85;
  margin: 0;
}
.page-faq .faq-hero__side {
  border-left: 1px solid var(--line);
  padding-left: 1.15rem;
  align-self: end;
}
.page-faq .faq-hero__side-label {
  display: inline-block;
  margin: 0 0 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  transform: rotate(-2deg);
  transform-origin: left bottom;
}
.page-faq .faq-hero__side-value {
  margin: 0;
  font-size: 2.1rem;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}
.page-faq .faq-hero__side-note {
  margin: 0.7rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 26em;
}

/* 主布局 */
.page-faq .faq-shell {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  gap: var(--faq-gap);
}

/* 目录 */
.page-faq .faq-toc__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.page-faq .faq-toc ol {
  display: flex;
  gap: 0.35rem;
  overflow-x: auto;
  margin: 0;
  padding: 0.35rem 0;
  list-style: none;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}
.page-faq .faq-toc a {
  display: block;
  padding: 0.45rem 0.3rem 0.45rem 0.7rem;
  border-left: 2px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.page-faq .faq-toc a .mono {
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  margin-right: 0.4rem;
}
.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(63, 232, 196, 0.11), transparent 85%);
}

/* 区块 */
.page-faq .faq-section {
  padding: clamp(2rem, 5vw, 3.25rem) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}
.page-faq .faq-section:first-child {
  border-top: 0;
  padding-top: 0.5rem;
}
.page-faq .faq-section__title {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin: 0 0 1.1rem;
  font-size: clamp(1.35rem, 3.6vw, 1.95rem);
  line-height: 1.25;
  letter-spacing: 0.03em;
}
.page-faq .faq-section__num {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
  flex: 0 0 auto;
}
.page-faq .faq-section__intro {
  margin: 0 0 1.6rem;
  max-width: 40em;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--muted);
}
.page-faq .faq-aside {
  margin: 1.5rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--cyan-dim);
  max-width: 42em;
  font-size: 0.875rem;
  line-height: 1.85;
  color: var(--muted);
}

/* 图 */
.page-faq .faq-figure {
  aspect-ratio: 1 / 1;
  max-width: 460px;
  margin: 0 auto 2.25rem;
}
.page-faq .faq-figure--wide {
  aspect-ratio: 12 / 7;
  max-width: 100%;
  margin: 0 0 2rem;
}

/* 三步卡 */
.page-faq .step-list {
  display: grid;
  gap: 1rem;
}
.page-faq .step {
  position: relative;
  padding: 1.25rem 1.25rem 1.4rem;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius-soft);
  overflow: hidden;
}
.page-faq .step::after {
  content: "";
  position: absolute;
  inset: auto -30% -55% auto;
  width: 70%;
  height: 130%;
  background: radial-gradient(circle at 60% 40%, rgba(63, 232, 196, 0.13), transparent 65%);
  pointer-events: none;
}
.page-faq .step > * { position: relative; z-index: 1; }
.page-faq .step__num {
  margin: 0;
  font-size: 2rem;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}
.page-faq .step h3 {
  margin: 0.6rem 0 0.5rem;
  font-size: 1.0625rem;
  line-height: 1.45;
  letter-spacing: 0.02em;
}
.page-faq .step p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
}
.page-faq .step .step__out {
  margin-top: 0.95rem;
  padding-top: 0.8rem;
  border-top: 1px dashed var(--line);
  font-size: 0.8125rem;
  line-height: 1.75;
}
.page-faq .step .step__out strong {
  color: var(--cyan);
  font-weight: 500;
  margin-right: 0.4rem;
}

/* 速查表 */
.page-faq .term-wrap {
  overflow-x: auto;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
}
.page-faq .term-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 0.9375rem;
}
.page-faq .term-table__caption {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.page-faq .term-table th {
  padding: 0.85rem 0.9rem 0.85rem 0;
  text-align: left;
  vertical-align: bottom;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.page-faq .term-table td {
  padding: 1.05rem 0.9rem 1.05rem 0;
  vertical-align: top;
  line-height: 1.75;
  color: var(--muted);
  border-bottom: 1px solid var(--line-soft);
}
.page-faq .term-table tr:last-child td { border-bottom: 0; }
.page-faq .term-table td:nth-child(2) {
  color: var(--paper);
  font-weight: 500;
  white-space: nowrap;
}
.page-faq .term-table td:nth-child(3) {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  white-space: nowrap;
}
.page-faq .term-table td:last-child { min-width: 22em; }
.page-faq .abbr {
  display: inline-block;
  padding: 0.12rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  border: 1px solid rgba(63, 232, 196, 0.42);
  border-radius: var(--radius-tag);
  background: rgba(63, 232, 196, 0.07);
}

/* 问答 */
.page-faq .qa-group {
  margin-top: 1.75rem;
  border-top: 1px solid var(--line);
}
.page-faq .qa-group:first-of-type { margin-top: 0.5rem; }
.page-faq .qa-group__label {
  margin: 0;
  padding: 0.85rem 0 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}
.page-faq .qa { border-bottom: 1px solid var(--line-soft); }
.page-faq .qa__head {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
}
.page-faq .qa__btn {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1rem 0;
  background: none;
  border: 0;
  color: var(--paper);
  font: inherit;
  letter-spacing: 0.01em;
  text-align: left;
  cursor: pointer;
  transition: color 0.25s var(--ease);
}
.page-faq .qa__btn:hover { color: var(--cyan); }
.page-faq .qa__btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.page-faq .qa__mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--cyan);
  border: 1px solid rgba(63, 232, 196, 0.35);
  border-radius: var(--radius-tag);
  padding: 0 0.32rem;
}
.page-faq .qa__panel { padding: 0 0 1.15rem 2.1rem; }
.page-faq .qa__panel[hidden] { display: none; }
.page-faq .qa__panel p {
  margin: 0;
  max-width: 42em;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--muted);
}
.page-faq .qa__panel a,
.page-faq .feedback__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 232, 196, 0.38);
}
.page-faq .qa__panel a:hover,
.page-faq .feedback__foot a:hover { border-bottom-color: var(--cyan); }

/* 修订记录 */
.page-faq .rev-track {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}
.page-faq .rev-step {
  position: relative;
  margin-left: 5px;
  padding: 0 0 1.6rem 1.75rem;
  border-left: 1px solid var(--line);
}
.page-faq .rev-step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 0.45rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(63, 232, 196, 0.16);
}
.page-faq .rev-step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}
.page-faq .rev-step__title {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--paper);
}
.page-faq .rev-step p {
  margin: 0;
  max-width: 44em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
}

/* 反馈 */
.page-faq .feedback {
  position: relative;
  overflow: hidden;
  padding: clamp(1.35rem, 4vw, 2.5rem);
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius-soft);
}
.page-faq .feedback::after {
  content: "";
  position: absolute;
  right: -25%;
  bottom: -70%;
  width: 70%;
  height: 180%;
  background: radial-gradient(circle at 50% 50%, rgba(63, 232, 196, 0.17), transparent 62%);
  pointer-events: none;
}
.page-faq .feedback > * { position: relative; z-index: 1; }
.page-faq .feedback__lead {
  margin: 0 0 1.4rem;
  max-width: 46em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--paper);
}
.page-faq .feedback__mail {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
  margin: 0 0 1.4rem;
  font-family: var(--font-mono);
  font-size: 1rem;
}
.page-faq .feedback__label {
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.page-faq .feedback__mail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 232, 196, 0.42);
  word-break: break-all;
}
.page-faq .feedback__list {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}
.page-faq .feedback__list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--muted);
}
.page-faq .feedback__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 0.55rem;
  height: 1px;
  background: var(--cyan);
}
.page-faq .feedback__foot {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--muted);
}

/* 响应式 */
@media (min-width: 640px) {
  .page-faq .feedback__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-faq .step-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    column-gap: clamp(2rem, 5vw, 4.5rem);
  }
  .page-faq .faq-hero__side { padding-bottom: 0.35rem; }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-toc-w) minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 1.75rem);
    align-self: start;
  }
  .page-faq .faq-toc ol {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    border-bottom: 0;
    padding: 0;
  }
  .page-faq .faq-toc a {
    padding: 0.5rem 0.6rem 0.5rem 0.85rem;
  }
  .page-faq .faq-section:first-child { padding-top: 0; }
}

@media (min-width: 1280px) {
  .page-faq .faq-figure { max-width: 520px; }
}
<<<END>>>