.page-faq {
  --faq-rule: 2px solid var(--steel);
  --faq-side: clamp(200px, 22vw, 268px);
  background: var(--ink);
  color: var(--paper);
}

.page-faq .faq-intro {
  padding-block: clamp(22px, 3.4vw, 44px) clamp(24px, 3.6vw, 46px);
  border-bottom: var(--faq-rule);
}

.page-faq .faq-intro h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.2vw, 4.2rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.01em;
  max-width: 18ch;
}

.page-faq .faq-lede {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: clamp(0.96rem, 1.1vw, 1.06rem);
  line-height: 1.78;
  color: rgba(242, 251, 248, 0.82);
}

.page-faq .faq-facts {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: var(--faq-rule);
  background: var(--ink-2);
  font-size: 0.82rem;
  color: var(--muted);
}

.page-faq .faq-facts .mono {
  font-size: 1rem;
  color: var(--lime);
  font-weight: 700;
}

/* 热门问题 */
.page-faq .faq-hot {
  position: relative;
  overflow: hidden;
  border-bottom: var(--faq-rule);
  background: var(--ink-2);
}

.page-faq .faq-hot__media {
  position: absolute;
  inset: 0;
  opacity: 0.28;
  pointer-events: none;
}

.page-faq .faq-hot__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-faq .faq-hot__inner {
  position: relative;
  padding-block: clamp(26px, 4vw, 54px);
}

.page-faq .faq-hot__note {
  margin: 8px 0 20px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .hot-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .hot-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: var(--faq-rule);
  background: rgba(6, 26, 36, 0.78);
  color: var(--paper);
  text-decoration: none;
  font-size: 0.92rem;
  line-height: 1.45;
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .hot-link:hover,
.page-faq .hot-link:focus-visible {
  border-color: var(--cyan);
  background: rgba(23, 63, 76, 0.9);
  transform: translateX(4px);
}

.page-faq .hot-idx {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--orange);
  flex: none;
}

/* 主体两栏 */
.page-faq .faq-shell {
  display: grid;
  gap: var(--gap);
  padding-block: clamp(24px, 3.6vw, 44px) clamp(44px, 6vw, 88px);
}

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

.page-faq .rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .rail-list li {
  flex: none;
}

.page-faq .rail-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border: var(--faq-rule);
  background: var(--ink-2);
  color: var(--paper);
  text-decoration: none;
  font-size: 0.85rem;
  white-space: nowrap;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .rail-link .mono {
  font-size: 0.7rem;
  color: var(--lime);
  letter-spacing: 0.1em;
}

.page-faq .rail-link:hover,
.page-faq .rail-link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .rail-link--accent {
  border-color: var(--orange);
}

.page-faq .rail-link--accent:hover,
.page-faq .rail-link--accent:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
}

.page-faq .rail-status {
  display: none;
  margin-top: 20px;
  padding: 12px 14px;
  border-left: 3px solid var(--cyan);
  background: var(--ink-2);
}

.page-faq .rail-status p {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--muted);
}

/* 问题分组 */
.page-faq .faq-body {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
  min-width: 0;
}

.page-faq .faq-group {
  border-top: var(--faq-rule);
  padding-top: clamp(16px, 2.4vw, 26px);
  scroll-margin-top: 110px;
}

.page-faq .group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.page-faq .group-code {
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--lime);
  flex: none;
}

.page-faq .group-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  font-weight: 700;
  line-height: 1.15;
}

.page-faq .group-note {
  margin: 0 0 16px;
  font-size: 0.87rem;
  line-height: 1.7;
  color: var(--muted);
  max-width: 62ch;
}

.page-faq .group-figure {
  margin: 0 0 16px;
  border: var(--faq-rule);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard);
}

.page-faq .group-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .group-figure figcaption {
  padding: 8px 12px;
  border-top: var(--faq-rule);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* 折叠问答 */
.page-faq .qa {
  border: var(--faq-rule);
  background: var(--ink-2);
  margin-bottom: 8px;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--panel);
}

.page-faq .qa[open] {
  border-color: var(--cyan);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-faq .qa summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 15px;
  cursor: pointer;
  list-style: none;
  font-size: 0.97rem;
  line-height: 1.5;
}

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

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

.page-faq .qa-num {
  flex: none;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .qa-q {
  flex: 1;
  min-width: 0;
  font-weight: 600;
}

.page-faq .qa summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--orange);
}

.page-faq .qa[open] summary::after {
  content: "−";
  color: var(--lime);
}

.page-faq .qa-a {
  padding: 0 15px 15px 39px;
  font-size: 0.9rem;
  line-height: 1.78;
  color: rgba(242, 251, 248, 0.84);
}

.page-faq .qa-a p {
  margin: 0;
}

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

.page-faq .qa-a a:hover,
.page-faq .qa-a a:focus-visible {
  color: var(--lime);
}

/* 联系支持 */
.page-faq .support-contact {
  border: 2px solid var(--cyan);
  background: var(--ink-2);
  padding: clamp(20px, 3.2vw, 36px);
  box-shadow: var(--shadow-hard);
  scroll-margin-top: 110px;
}

.page-faq .support-contact__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-faq .support-contact__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.2vw, 2.05rem);
  font-weight: 700;
  line-height: 1.15;
}

.page-faq .support-contact__lede {
  margin: 12px 0 22px;
  max-width: 60ch;
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(242, 251, 248, 0.84);
}

.page-faq .contact-grid {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: var(--faq-rule);
}

.page-faq .contact-cell {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: var(--faq-rule);
}

.page-faq .contact-cell dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .contact-cell dd {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  word-break: break-word;
}

.page-faq .contact-cell dd.mono {
  color: var(--lime);
  font-weight: 700;
  letter-spacing: 0.04em;
}

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

.page-faq .contact-cell a:hover,
.page-faq .contact-cell a:focus-visible {
  color: var(--orange);
}

.page-faq .support-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .support-contact__note {
  margin: 18px 0 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .support-contact__note a {
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .support-contact__note a:hover,
.page-faq .support-contact__note a:focus-visible {
  color: var(--cyan);
}

/* 响应式 */
@media (min-width: 620px) {
  .page-faq .hot-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(16px, 3vw, 34px);
  }
}

@media (min-width: 700px) {
  .page-faq .qa-a {
    padding-left: 15px;
    padding-right: clamp(15px, 3vw, 40px);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-side) minmax(0, 1fr);
    gap: clamp(26px, 3.6vw, 58px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }

  .page-faq .rail-list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .rail-link {
    white-space: normal;
    justify-content: flex-start;
  }

  .page-faq .rail-status {
    display: flex;
    gap: 10px;
    align-items: flex-start;
  }

  .page-faq .hot-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .page-faq .faq-intro h1 {
    max-width: 22ch;
  }
}

@media (min-width: 1280px) {
  .page-faq .support-contact {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    column-gap: clamp(24px, 3vw, 48px);
    align-items: start;
  }

  .page-faq .support-contact__head,
  .page-faq .support-contact__lede {
    grid-column: 1;
  }

  .page-faq .contact-grid {
    grid-column: 2;
    grid-row: 1 / span 3;
    border-top: none;
  }

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

  .page-faq .support-contact__actions,
  .page-faq .support-contact__note {
    grid-column: 1;
  }
}

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

  .page-faq .hot-link:hover,
  .page-faq .hot-link:focus-visible {
    transform: none;
  }
}
<<<END>>>