.page-faq {
  --faq-gap: clamp(1.5rem, 4vw, 3rem);
  --faq-radius: 0;
  background: var(--ink-900);
  color: var(--ice);
}

/* ---------- 首屏封面 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: calc(var(--header-h) * -1);
  padding: calc(var(--header-h) + 2rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(115% 85% at 82% 4%, rgba(56, 214, 196, 0.16), transparent 62%),
    radial-gradient(85% 65% at 4% 96%, rgba(242, 169, 59, 0.13), transparent 66%),
    var(--ink-900);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(to right, rgba(47, 70, 91, 0.42) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(to bottom, rgba(47, 70, 91, 0.28) 0 1px, transparent 1px 72px);
  opacity: 0.55;
}

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}

.page-faq .faq-hero__intro .display {
  margin: 0.6rem 0 1.15rem;
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2.25rem;
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-fact {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

/* 检索框 */
.page-faq .faq-search {
  padding: clamp(1.15rem, 3vw, 1.75rem);
  background: linear-gradient(158deg, rgba(16, 40, 61, 0.94), rgba(8, 24, 38, 0.94));
  border: 1px solid var(--line);
  box-shadow: inset 0 1px 0 rgba(234, 244, 247, 0.06);
}

.page-faq .faq-search__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 0.7rem;
}

.page-faq .faq-search__field {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0 0.9rem;
  border: 1px solid var(--line);
  background: rgba(8, 24, 38, 0.85);
  transition: border-color 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-faq .faq-search__field:focus-within {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(56, 214, 196, 0.16);
  animation: faqPulse 900ms var(--ease) 1;
}

@keyframes faqPulse {
  0% { box-shadow: 0 0 0 0 rgba(56, 214, 196, 0.4); }
  100% { box-shadow: 0 0 0 12px rgba(56, 214, 196, 0); }
}

.page-faq .faq-search__icon {
  flex: none;
  color: var(--cyan);
}

.page-faq .faq-search__field input {
  width: 100%;
  min-width: 0;
  padding: 0.95rem 0;
  border: 0;
  background: transparent;
  color: var(--ice);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.4;
}

.page-faq .faq-search__field input::placeholder {
  color: var(--sage);
}

.page-faq .faq-search__field input:focus {
  outline: none;
}

.page-faq .faq-search__hint {
  margin: 1.1rem 0 0.6rem;
  font-size: 0.875rem;
  color: var(--mist);
}

.page-faq .faq-search__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-search__chips a {
  display: inline-block;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  color: var(--ice);
  font-size: 0.8125rem;
  text-decoration: none;
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

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

.page-faq .faq-search__foot {
  margin: 1rem 0 0;
  color: var(--sage);
}

.page-faq .faq-hero__media {
  margin: 1.25rem 0 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line-soft);
}

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

/* ---------- 服务清单 ---------- */
.page-faq .faq-catalog {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

.page-faq .faq-rail {
  border: 1px solid var(--line);
  background: rgba(16, 40, 61, 0.55);
  padding: 1.25rem;
}

.page-faq .faq-rail__title {
  margin: 0 0 0.85rem;
  color: var(--cyan);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.7rem 0.65rem;
  background: var(--ink-850);
  color: var(--ice);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  background: var(--ink-800);
  color: var(--cyan);
}

.page-faq .faq-rail__no {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--amber);
}

.page-faq .faq-rail__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--sage);
}

.page-faq .faq-rail__note {
  margin: 1rem 0 0;
  color: var(--sage);
  line-height: 1.6;
}

.page-faq .faq-cats {
  display: grid;
  gap: 0;
}

.page-faq .faq-cat {
  padding: 1.5rem 0 1.75rem;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-cat:first-child {
  border-top: 1px solid var(--line);
  padding-top: 0;
}

.page-faq .faq-cat__head {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.page-faq .faq-cat__num {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  line-height: 1;
  color: var(--amber);
}

.page-faq .faq-cat__title {
  margin: 0;
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-faq .faq-cat__summary {
  margin: 0.7rem 0 1rem;
  max-width: 68ch;
  color: var(--mist);
  font-size: 0.9375rem;
  line-height: 1.75;
}

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

.page-faq .faq-entries li {
  display: flex;
  gap: 0.9rem;
  padding: 0.65rem 0;
  border-bottom: 1px dotted var(--line-soft);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--ice);
}

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

.page-faq .faq-entries__idx {
  flex: none;
  min-width: 3.1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--sage);
  letter-spacing: 0.05em;
}

/* ---------- 入门指南 ---------- */
.page-faq .faq-guide-section {
  background: linear-gradient(180deg, rgba(16, 40, 61, 0.5), transparent 60%);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-guide {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

.page-faq .faq-track {
  position: relative;
}

.page-faq .faq-track::before {
  content: "";
  position: absolute;
  left: 1.05rem;
  top: 0.5rem;
  bottom: 2.5rem;
  width: 1px;
  background: linear-gradient(180deg, var(--amber), var(--cyan) 55%, rgba(47, 70, 91, 0.2));
}

.page-faq .faq-step {
  position: relative;
  padding-left: 3.25rem;
  padding-bottom: 1.85rem;
}

.page-faq .faq-step:last-child {
  padding-bottom: 0;
}

.page-faq .faq-step__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 2.1rem;
  padding: 0.1rem 0;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  line-height: 1.2;
  color: var(--amber);
  background: var(--ink-900);
  text-align: center;
}

.page-faq .faq-step__title {
  margin: 0 0 0.45rem;
  font-size: clamp(1.1rem, 2.3vw, 1.35rem);
  color: var(--ice);
  letter-spacing: -0.01em;
}

.page-faq .faq-step__text {
  margin: 0 0 0.65rem;
  max-width: 62ch;
  color: var(--mist);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-faq .faq-step__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.4rem;
}

.page-faq .faq-step__list li {
  position: relative;
  padding-left: 1.05rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--ice);
}

.page-faq .faq-step__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62rem;
  width: 0.4rem;
  height: 0.4rem;
  background: var(--cyan);
}

.page-faq .faq-guide__aside {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

.page-faq .faq-guide__media {
  margin: 0;
  aspect-ratio: 2 / 1;
  border: 1px solid var(--line);
}

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

.page-faq .faq-guide__note {
  padding: 1.25rem;
  border: 1px solid var(--line);
  background: rgba(8, 24, 38, 0.72);
}

.page-faq .faq-guide__note .idx {
  margin: 0 0 0.5rem;
  color: var(--cyan);
}

.page-faq .faq-guide__note p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-guide__note .btn {
  margin-top: 0.15rem;
}

/* ---------- 常见问题 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.5rem);
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-faq .faq-group__title {
  margin: 0 0 0.35rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--sage);
}

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

.page-faq .faq-q summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0;
  cursor: pointer;
  list-style: none;
  font-size: 0.9688rem;
  line-height: 1.6;
  color: var(--ice);
  transition: color 200ms var(--ease);
}

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

.page-faq .faq-q summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1.4;
  color: var(--cyan);
}

.page-faq .faq-q summary:hover {
  color: var(--cyan);
}

.page-faq .faq-q summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-q[open] summary {
  color: var(--amber);
}

.page-faq .faq-q[open] summary::after {
  content: "–";
  color: var(--amber);
}

.page-faq .faq-q p {
  margin: 0 0 1.1rem;
  max-width: 68ch;
  color: var(--mist);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-faq .faq-questions__more {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding-top: 1.15rem;
  border-top: 1px solid var(--line-soft);
  max-width: 70ch;
  color: var(--mist);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ---------- 清单更新 ---------- */
.page-faq .faq-update-section {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-update {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1px solid var(--paper-2);
  color: var(--ink-900);
}

.page-faq .faq-update .kicker {
  color: var(--amber-deep);
}

.page-faq .faq-update .h2 {
  margin: 0.4rem 0 0.85rem;
  color: var(--ink-900);
}

.page-faq .faq-update__main > p {
  margin: 0 0 1.15rem;
  max-width: 66ch;
  font-size: 0.9688rem;
  line-height: 1.8;
  color: var(--ink-800);
}

.page-faq .faq-update__list {
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.7rem;
}

.page-faq .faq-update__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid rgba(8, 24, 38, 0.16);
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--ink-800);
}

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

.page-faq .faq-update__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-faq .faq-update__side {
  padding-top: 1.25rem;
  border-top: 1px solid rgba(8, 24, 38, 0.16);
}

.page-faq .faq-update__side .idx {
  margin: 0 0 0.4rem;
  color: var(--amber-deep);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-faq .faq-update__side p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-800);
}

.page-faq .faq-update__link {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--amber-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--amber-deep);
}

.page-faq .faq-update__link:hover,
.page-faq .faq-update__link:focus-visible {
  color: var(--ink-900);
  border-color: var(--ink-900);
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-support-section {
  border-top: 1px solid var(--line-soft);
  background:
    radial-gradient(80% 70% at 88% 20%, rgba(56, 214, 196, 0.1), transparent 65%),
    var(--ink-900);
}

.page-faq .faq-support {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
}

.page-faq .faq-support__text .lead {
  margin-bottom: 1.5rem;
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-faq .faq-support__card {
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border: 1px solid var(--line);
  background: rgba(16, 40, 61, 0.7);
}

.page-faq .faq-support__card-title {
  margin: 0 0 1rem;
  color: var(--cyan);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-faq .faq-contact {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 0.2rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line-soft);
}

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

.page-faq .faq-contact__row dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--sage);
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ice);
  word-break: break-word;
}

.page-faq .faq-support__card .contact-note {
  margin: 1.1rem 0 0;
  color: var(--mist);
  font-size: 0.875rem;
  line-height: 1.75;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(1.5rem, 4vw, 3rem);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
    align-items: start;
  }

  .page-faq .faq-catalog {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
  }

  .page-faq .faq-guide {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }

  .page-faq .faq-update {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.45fr);
    align-items: start;
  }

  .page-faq .faq-update__side {
    padding-top: 0;
    padding-left: clamp(1.25rem, 3vw, 2rem);
    border-top: 0;
    border-left: 1px solid rgba(8, 24, 38, 0.16);
  }

  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__aside {
    display: grid;
    gap: 1.25rem;
  }

  .page-faq .faq-hero__media {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-search__field:focus-within {
    animation: none;
  }

  .page-faq .faq-search__chips a,
  .page-faq .faq-rail__list a,
  .page-faq .faq-q summary {
    transition: none;
  }
}