.page-faq {
  --faq-line: rgba(111, 143, 166, .28);
  --faq-shadow: 4px 4px 0 var(--fog);
  --faq-soft: rgba(245, 248, 247, .78);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

.page-faq .mono {
  font-family: var(--font-mono);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.4rem, 4vw, 2.2rem) 0 clamp(2.2rem, 6vw, 3.6rem);
  background:
    radial-gradient(120% 90% at 84% 0%, rgba(43, 231, 200, .16), transparent 58%),
    linear-gradient(158deg, var(--deep) 0%, var(--ink) 74%);
  color: var(--paper);
}

.page-faq .faq-hero__veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: .22;
  pointer-events: none;
}

.page-faq .faq-hero__veil svg {
  width: 100%;
  height: 100%;
  display: block;
}

.page-faq .faq-hero .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  font-size: .82rem;
  color: var(--faq-soft);
  margin-bottom: clamp(1.6rem, 4vw, 2.4rem);
}

.page-faq .faq-hero .breadcrumb__item {
  color: var(--faq-soft);
  text-decoration: none;
}

.page-faq .faq-hero a.breadcrumb__item:hover {
  color: var(--cyan);
}

.page-faq .faq-hero .breadcrumb__sep {
  color: rgba(216, 179, 106, .8);
}

.page-faq .faq-hero__kicker {
  font-size: .74rem;
  letter-spacing: .22em;
  color: var(--cyan);
  margin: 0 0 .9rem;
  display: flex;
  align-items: center;
  gap: .6rem;
}

.page-faq .faq-hero__kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--sand);
  display: inline-block;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(2rem, 5.4vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -.015em;
  margin: 0 0 1.1rem;
  max-width: 20ch;
}

.page-faq .faq-hero__lede {
  max-width: 58ch;
  margin: 0 0 1.6rem;
  color: var(--faq-soft);
  font-size: clamp(.98rem, 1.4vw, 1.08rem);
  line-height: 1.8;
}

.page-faq .faq-jump {
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-faq .faq-jump a {
  display: inline-block;
  padding: .42rem .85rem;
  border: 1px solid rgba(245, 248, 247, .24);
  border-radius: var(--radius);
  color: var(--paper);
  font-size: .85rem;
  text-decoration: none;
  transition: border-color .2s ease, color .2s ease, background-color .2s ease;
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(43, 231, 200, .08);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.2rem;
  padding-top: 1.4rem;
  border-top: 1px solid rgba(245, 248, 247, .16);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: .3rem;
}

.page-faq .faq-stat strong {
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 600;
  color: var(--cyan);
  line-height: 1;
}

.page-faq .faq-stat span {
  font-size: .8rem;
  color: rgba(245, 248, 247, .66);
  line-height: 1.5;
}

/* ---------- 主体三栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.8rem, 4vw, 2.6rem);
  padding-block: clamp(2.2rem, 5vw, 3.6rem) clamp(3rem, 7vw, 5rem);
}

.page-faq .faq-index {
  align-self: start;
}

.page-faq .faq-index__title {
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--slate);
  margin: 0 0 .8rem;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0 0 1.1rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem .7rem;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--slate);
  font-size: .84rem;
  text-decoration: none;
  transition: border-color .2s ease, color .2s ease, box-shadow .2s ease;
}

.page-faq .faq-index__link .mono {
  font-size: .72rem;
  color: var(--mist);
}

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

.page-faq .faq-index__link[aria-current="true"] {
  border-color: var(--cyan);
  border-left-width: 3px;
  box-shadow: 2px 2px 0 rgba(43, 231, 200, .28);
  color: var(--ink);
}

.page-faq .faq-index__link[aria-current="true"] .mono {
  color: var(--maint);
}

.page-faq .faq-index__cta {
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* ---------- 章节 ---------- */
.page-faq .chapter {
  padding-bottom: clamp(2rem, 4vw, 3rem);
  margin-bottom: clamp(2rem, 4vw, 3rem);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .chapter:last-of-type {
  border-bottom: 0;
  margin-bottom: 0;
}

.page-faq .section-head {
  margin-bottom: 1.5rem;
}

.page-faq .section-num {
  font-size: .78rem;
  letter-spacing: .18em;
  color: var(--sand);
  margin: 0 0 .5rem;
}

.page-faq .section-title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  margin: 0 0 .7rem;
  color: var(--ink);
}

.page-faq .lede {
  max-width: 62ch;
  margin: 0;
  color: var(--slate);
  font-size: .97rem;
  line-height: 1.85;
}

.page-faq .chapter__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.4rem;
}

.page-faq .chapter__figure {
  margin: 0;
}

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

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  background: #fff;
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--mist);
  box-shadow: var(--faq-shadow);
  margin-bottom: .8rem;
  transition: border-color .2s ease;
}

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

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: .65rem;
  padding: .9rem 1rem;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: .95rem;
  line-height: 1.55;
  color: var(--ink);
}

.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__no {
  flex: none;
  font-size: .74rem;
  color: var(--mist);
  padding-top: .18rem;
}

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

.page-faq .qa__sign {
  flex: none;
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: .28rem;
  transition: transform .2s ease;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--slate);
  border-radius: 1px;
}

.page-faq .qa__sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .qa__sign::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

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

.page-faq .qa[open] .qa__sign::before,
.page-faq .qa[open] .qa__sign::after {
  background: var(--maint);
}

.page-faq .qa__a {
  padding: 0 1rem 1rem 2.35rem;
  color: var(--slate);
  font-size: .92rem;
  line-height: 1.85;
}

.page-faq .qa__a p {
  margin: 0 0 .6rem;
}

.page-faq .qa__a p:last-child {
  margin-bottom: 0;
}

.page-faq .qa__a strong {
  color: var(--ink);
}

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

.page-faq .qa__a a:hover {
  color: var(--maint);
}

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

/* ---------- 下载步骤 ---------- */
.page-faq .flow-steps {
  list-style: none;
  counter-reset: flow;
  margin: 0 0 1.8rem;
  padding: 1.2rem;
  background: #fff;
  border: 1px solid var(--faq-line);
  box-shadow: var(--faq-shadow);
}

.page-faq .flow-steps li {
  display: flex;
  gap: .85rem;
  padding: .75rem 0;
  border-bottom: 1px dashed var(--faq-line);
}

.page-faq .flow-steps li:first-child {
  padding-top: 0;
}

.page-faq .flow-steps li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .flow__no {
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--deep);
  color: var(--cyan);
  font-size: .78rem;
  display: grid;
  place-items: center;
}

.page-faq .flow-steps strong {
  display: block;
  font-size: .95rem;
  color: var(--ink);
  margin-bottom: .18rem;
}

.page-faq .flow-steps p {
  margin: 0;
  font-size: .89rem;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 状态面板 ---------- */
.page-faq .status-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .75rem;
  margin-bottom: 1.6rem;
}

.page-faq .status-card {
  background: #fff;
  border: 1px solid var(--faq-line);
  border-left: 4px solid var(--mist);
  padding: 1rem 1.1rem;
}

.page-faq .status-card--stable { border-left-color: var(--stable); }
.page-faq .status-card--live { border-left-color: var(--cyan); }
.page-faq .status-card--maint { border-left-color: var(--maint); }
.page-faq .status-card--arch { border-left-color: var(--sand); }

.page-faq .status-card h3 {
  font-size: .98rem;
  margin: .55rem 0 .35rem;
  color: var(--ink);
}

.page-faq .status-card p {
  margin: 0;
  font-size: .87rem;
  line-height: 1.72;
  color: var(--slate);
}

.page-faq .tag {
  display: inline-block;
  font-size: .72rem;
  letter-spacing: .06em;
  padding: .18rem .5rem;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  text-decoration: none;
}

.page-faq .tag--stable { color: var(--stable); }
.page-faq .tag--live { color: #128A78; }
.page-faq .tag--maint { color: var(--maint); }
.page-faq .tag--sand { color: #9A7B3C; }

.page-faq .adapter-note {
  background: linear-gradient(150deg, #EFF5F4 0%, var(--fog) 100%);
  border: 1px solid var(--faq-line);
  padding: 1.2rem 1.2rem 1rem;
}

.page-faq .adapter-note__lead {
  margin: 0 0 .8rem;
  font-weight: 600;
  font-size: .93rem;
  color: var(--ink);
  line-height: 1.7;
}

.page-faq .checklist {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  counter-reset: check;
}

.page-faq .checklist li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: .6rem;
  font-size: .89rem;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62rem;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  border: 1px solid var(--deep);
}

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

.page-faq .adapter-note__foot {
  margin: 0;
  padding-top: .8rem;
  border-top: 1px solid rgba(111, 143, 166, .35);
  font-size: .74rem;
  letter-spacing: .03em;
  color: var(--slate);
  line-height: 1.8;
}

/* ---------- 客服准备 ---------- */
.page-faq .chapter--support .section-head {
  padding-top: .4rem;
}

.page-faq .support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .7rem;
  margin-bottom: 1.6rem;
}

.page-faq .support-item {
  background: #fff;
  border: 1px solid var(--faq-line);
  padding: .9rem 1rem;
}

.page-faq .support-item__no {
  font-size: .72rem;
  color: var(--sand);
  letter-spacing: .12em;
}

.page-faq .support-item h3 {
  font-size: .93rem;
  margin: .3rem 0 .3rem;
  color: var(--ink);
}

.page-faq .support-item p {
  margin: 0;
  font-size: .83rem;
  line-height: 1.68;
  color: var(--slate);
}

.page-faq .faq-cta {
  background: linear-gradient(150deg, var(--deep) 0%, var(--ink) 88%);
  color: var(--paper);
  padding: clamp(1.3rem, 3vw, 2rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.3rem;
  border-radius: var(--radius);
}

.page-faq .faq-cta h3 {
  font-family: var(--font-title);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 800;
  margin: 0 0 .7rem;
  color: var(--paper);
}

.page-faq .faq-cta p {
  margin: 0 0 .7rem;
  font-size: .9rem;
  line-height: 1.8;
  color: rgba(245, 248, 247, .78);
  max-width: 56ch;
}

.page-faq .faq-cta__contact {
  color: var(--cyan);
  letter-spacing: .04em;
  font-size: .9rem;
}

.page-faq .faq-cta__addr {
  font-size: .82rem;
  color: rgba(245, 248, 247, .58);
  margin-bottom: 0;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  align-items: flex-start;
}

.page-faq .faq-cta__actions .btn--ghost {
  color: var(--paper);
  border-color: rgba(245, 248, 247, .36);
}

.page-faq .faq-cta__actions .btn--ghost:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 右侧入口 ---------- */
.page-faq .faq-rail {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .8rem;
  align-self: start;
}

.page-faq .rail-card {
  background: #fff;
  border: 1px solid var(--faq-line);
  padding: .95rem 1rem;
}

.page-faq .rail-card__title {
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--mist);
  margin: 0 0 .7rem;
}

.page-faq .rail-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}

.page-faq .rail-tags .tag {
  background: rgba(216, 179, 106, .1);
}

.page-faq .rail-tags .tag:hover {
  background: var(--sand);
  color: var(--ink);
}

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

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

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

.page-faq .rail-links a {
  display: block;
  padding: .55rem 0;
  color: var(--deep);
  font-size: .88rem;
  text-decoration: none;
  transition: color .2s ease, padding-left .2s ease;
}

.page-faq .rail-links a:hover {
  color: var(--maint);
  padding-left: .3rem;
}

.page-faq .rail-card--note {
  background: linear-gradient(150deg, var(--fog), #EEF4F3);
}

.page-faq .rail-card--note p {
  margin: 0;
  font-size: .84rem;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .status-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .8rem;
  }

  .page-faq .qa-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .8rem;
  }

  .page-faq .qa-grid .qa {
    margin-bottom: 0;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 1.4rem);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: .35rem;
    margin-bottom: 1.2rem;
  }

  .page-faq .faq-index__link {
    width: 100%;
    border-left-width: 3px;
  }

  .page-faq .chapter__split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
    gap: 1.6rem;
  }

  .page-faq .chapter__split--rev {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  }

  .page-faq .chapter__split--rev .chapter__figure {
    order: 0;
  }

  .page-faq .chapter__figure {
    position: sticky;
    top: calc(var(--header-h) + 1.4rem);
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-faq .faq-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (min-width: 1140px) {
  .page-faq .faq-body {
    grid-template-columns: 190px minmax(0, 1fr) 220px;
    gap: 2.4rem;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__sign,
  .page-faq .faq-jump a,
  .page-faq .rail-links a,
  .page-faq .qa {
    transition: none;
  }
}