.page-faq {
  --faq-legend-w: 16rem;
  background: var(--c-ink);
  color: var(--c-paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 4vw, 2.5rem) 0 clamp(2rem, 5vw, 3.5rem);
  border-bottom: 1px solid var(--c-line-faint);
  background:
    radial-gradient(120% 90% at 92% -10%, rgba(63, 207, 154, 0.16), transparent 62%),
    var(--c-ink);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, var(--c-line-faint) 0 1px, transparent 1px 88px);
  opacity: 0.55;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 78%);
}

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

.page-faq .faq-hero .eyebrow {
  margin-top: 1.5rem;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 18em;
  margin: 0.7rem 0 1rem;
  color: var(--c-paper);
}

.page-faq .faq-hero__lede {
  max-width: 44rem;
  margin: 0 0 1.75rem;
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  line-height: 1.85;
  color: var(--c-cream);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 0;
  padding: 1rem 0 0;
  border-top: 1px solid var(--c-line-faint);
  display: grid;
  gap: 0.7rem 1.5rem;
}

.page-faq .faq-hero__facts li {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--c-muted);
}

.page-faq .faq-hero__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--c-mint-2);
  margin-bottom: 0.2rem;
}

/* ---------- 现象对照 ---------- */
.page-faq .faq-diagnose {
  padding: clamp(2.25rem, 6vw, 4rem) 0;
  background: var(--c-ink-2);
  border-bottom: 1px solid var(--c-line-faint);
}

.page-faq .faq-diagnose .lede {
  max-width: 42rem;
  margin-top: 0.75rem;
  color: var(--c-muted);
  line-height: 1.8;
}

.page-faq .diag-rows {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  border-bottom: 1px solid var(--c-line-faint);
}

.page-faq .diag-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1.25rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--c-line-faint);
  transition: background var(--dur) var(--ease);
}

.page-faq .diag-row:hover {
  background: rgba(107, 255, 196, 0.05);
}

.page-faq .diag-row__no {
  flex: 0 0 1.6rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--c-mint);
}

.page-faq .diag-row__main {
  flex: 1 1 16rem;
  min-width: 0;
}

.page-faq .diag-row__main h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--c-paper);
}

.page-faq .diag-row__main p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-faq .diag-row__go {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--c-mint-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .diag-row__go::after {
  content: " ↓";
}

.page-faq .diag-row__go:hover,
.page-faq .diag-row__go:focus-visible {
  color: var(--c-mint);
  border-bottom-color: var(--c-mint);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  padding: clamp(2.25rem, 6vw, 4rem) 0;
  background: var(--c-ink);
}

.page-faq .qa-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}

.page-faq .qa-legend__title {
  margin: 0 0 0.7rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--c-line-faint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

.page-faq .qa-legend__items {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem;
}

.page-faq .qa-legend__note {
  margin: 0.85rem 0 0;
  font-size: 0.76rem;
  line-height: 1.65;
  color: var(--c-muted);
}

.page-faq .legend-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-faq .legend-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  font-size: 0.8rem;
  line-height: 1.3;
  color: var(--c-cream);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .legend-btn:hover {
  border-color: var(--c-mint-2);
}

.page-faq .legend-btn__no,
.page-faq .legend-btn__ct {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--c-muted);
}

.page-faq .legend-btn__tx {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .legend-radio:focus-visible + .legend-btn {
  outline: 2px solid var(--c-mint);
  outline-offset: 2px;
}

.page-faq .legend-radio:checked + .legend-btn {
  background: var(--c-ink-3);
  border-color: var(--c-mint-2);
  color: var(--c-paper);
  box-shadow: inset 3px 0 0 var(--c-mint);
}

.page-faq .legend-radio:checked + .legend-btn .legend-btn__no {
  color: var(--c-mint);
}

.page-faq:has(#cat-entry:checked) .qa-item:not(.qa-item--entry),
.page-faq:has(#cat-position:checked) .qa-item:not(.qa-item--position),
.page-faq:has(#cat-reading:checked) .qa-item:not(.qa-item--reading),
.page-faq:has(#cat-index:checked) .qa-item:not(.qa-item--index) {
  display: none;
}

.page-faq .qa-item {
  border-top: 1px solid var(--c-line-faint);
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}

.page-faq .qa-item:last-child {
  border-bottom: 1px solid var(--c-line-faint);
}

.page-faq .qa-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.8rem;
  padding: 1.1rem 0.25rem;
  cursor: pointer;
  list-style: none;
  transition: background var(--dur) var(--ease);
}

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

.page-faq .qa-summary:hover {
  background: rgba(107, 255, 196, 0.05);
}

.page-faq .qa-summary:focus-visible {
  outline: 2px solid var(--c-mint);
  outline-offset: -2px;
}

.page-faq .qa-summary__no {
  flex: 0 0 1.9rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--c-mint-2);
}

.page-faq .qa-summary__q {
  flex: 1 1 12rem;
  min-width: 0;
  font-size: clamp(0.98rem, 2vw, 1.08rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--c-paper);
}

.page-faq .qa-summary__chev {
  flex: 0 0 auto;
  margin-left: auto;
  align-self: center;
  width: 0.65rem;
  height: 0.65rem;
  border-right: 1.5px solid var(--c-mint-2);
  border-bottom: 1.5px solid var(--c-mint-2);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-faq .qa-item[open] .qa-summary__chev {
  transform: rotate(225deg);
}

.page-faq .qa-body {
  padding: 0 0 1.6rem;
}

.page-faq .qa-tag {
  display: inline-block;
  margin: 0 0 0.6rem;
  padding: 0.18rem 0.5rem;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--c-mint-2);
}

.page-faq .qa-step {
  display: grid;
  grid-template-columns: 1.6rem minmax(0, 1fr);
  gap: 0.6rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--c-line-faint);
}

.page-faq .qa-step__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--c-muted);
  padding-top: 0.15rem;
}

.page-faq .qa-step__body h4 {
  margin: 0 0 0.3rem;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-mint);
}

.page-faq .qa-step__body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--c-cream);
}

.page-faq .qa-step__body a {
  color: var(--c-mint-2);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--c-line-soft);
}

.page-faq .qa-step__body a:hover {
  color: var(--c-mint);
  text-decoration-color: var(--c-mint);
}

.page-faq .qa-figure {
  margin: 1.25rem 0 0;
  padding: 0.5rem;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background: var(--c-ink-3);
}

.page-faq .qa-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 1px;
}

.page-faq .qa-figure figcaption {
  margin-top: 0.55rem;
  padding: 0 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.65;
  letter-spacing: 0.02em;
  color: var(--c-muted);
}

/* ---------- 反馈 ---------- */
.page-faq .faq-help {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(2rem, 5vw, 3.5rem);
  background: linear-gradient(180deg, var(--c-cream) 0%, var(--c-cream-2) 100%);
  color: var(--c-ink-2);
}

.page-faq .faq-help .chapter-num {
  color: #2F6B57;
}

.page-faq .faq-help h2 {
  margin: 0.5rem 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.55rem, 3.6vw, 2.35rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--c-ink-deep);
}

.page-faq .help-intro p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(11, 42, 34, 0.86);
}

.page-faq .help-intro a {
  color: var(--c-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(11, 42, 34, 0.4);
}

.page-faq .help-intro a:hover {
  text-decoration-color: var(--c-ink);
}

.page-faq .help-grid {
  display: grid;
  gap: 1.75rem;
}

.page-faq .checklist {
  padding: 1rem 1.1rem;
  border: 1px solid rgba(11, 42, 34, 0.22);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.34);
}

.page-faq .checklist__title {
  margin: 0 0 0.7rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(11, 42, 34, 0.16);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: #2F6B57;
}

.page-faq .checklist ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .checklist__item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(11, 42, 34, 0.12);
  cursor: pointer;
}

.page-faq .checklist li:last-child .checklist__item {
  border-bottom: 0;
}

.page-faq .checklist__item input {
  flex: 0 0 auto;
  width: 1.05rem;
  height: 1.05rem;
  margin: 0.22rem 0 0;
  accent-color: #1F8F68;
  cursor: pointer;
}

.page-faq .checklist__text {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--c-ink-deep);
}

.page-faq .checklist__text b {
  display: inline-block;
  margin-right: 0.35rem;
  font-weight: 700;
  color: var(--c-ink);
}

.page-faq .help-contact {
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  padding-top: 1.35rem;
  border-top: 1px solid rgba(11, 42, 34, 0.22);
  display: grid;
  gap: 0.75rem;
}

.page-faq .help-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.2rem 0.85rem;
}

.page-faq .help-contact__label {
  flex: 0 0 auto;
  min-width: 4.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--c-ink-3);
}

.page-faq .help-contact__val {
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--c-ink);
  overflow-wrap: anywhere;
}

.page-faq .help-more {
  margin: 1.4rem 0 0;
  font-size: 0.86rem;
  line-height: 1.85;
  color: rgba(11, 42, 34, 0.78);
}

.page-faq .help-more a {
  color: var(--c-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(11, 42, 34, 0.4);
}

.page-faq .help-more a:hover {
  text-decoration-color: var(--c-ink);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .qa-body {
    padding-left: 2.75rem;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .help-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem 2rem;
  }
}

@media (min-width: 900px) {
  .page-faq .qa-layout {
    grid-template-columns: var(--faq-legend-w) minmax(0, 1fr);
    gap: clamp(1.5rem, 3.5vw, 3rem);
    align-items: start;
  }

  .page-faq .qa-legend {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-faq .qa-legend__items {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 880px) {
  .page-faq .help-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }
}
<<<END>>>