.page-faq {
  --faq-gap: clamp(2.5rem, 6vw, 4.5rem);
  --faq-answer-width: 62ch;
  --faq-text-soft: #B8CBC4;
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-masthead {
  padding: clamp(1.5rem, 5vw, 3.5rem) 0 clamp(1.25rem, 3vw, 2rem);
}

.page-faq .breadcrumb {
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .faq-masthead h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.75rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--c-fog);
  max-width: 24ch;
  margin: 0 0 1.25rem;
}

.page-faq .faq-lede {
  max-width: 48ch;
  font-size: var(--step-18);
  line-height: 1.8;
  color: var(--faq-text-soft);
  margin: 0;
}

/* ---------- 关键词过滤 ---------- */
.page-faq .faq-finder {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(61, 242, 200, 0.10), transparent 55%),
    linear-gradient(155deg, var(--c-glass-strong), rgba(10, 46, 58, 0.5) 65%, rgba(6, 35, 28, 0.3));
  box-shadow: var(--c-shadow);
}

.page-faq .faq-search-label {
  display: block;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: 0.16em;
  color: var(--c-accent);
  margin-bottom: 0.7rem;
}

.page-faq .faq-search-input {
  width: 100%;
  font-family: var(--font-body);
  font-size: var(--step-18);
  line-height: 1.5;
  color: var(--c-fog);
  background: rgba(6, 35, 28, 0.6);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  padding: 0.95rem 1.1rem;
  outline: none;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.page-faq .faq-search-input::placeholder {
  color: var(--c-ash);
}

.page-faq .faq-search-input:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(61, 242, 200, 0.18);
}

.page-faq .faq-search-note {
  margin: 0.7rem 0 0;
  font-size: var(--step-14);
  line-height: 1.7;
  color: var(--c-ash);
}

.page-faq .faq-map {
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--c-carbon);
}

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

.page-faq .faq-map figcaption,
.page-faq .faq-group-visual figcaption {
  font-size: var(--step-12);
  line-height: 1.65;
  color: var(--c-ash);
  background: rgba(11, 15, 14, 0.65);
  padding: 0.6rem 0.8rem;
}

.page-faq .faq-empty {
  margin: 1.25rem 0 0;
  padding: 1rem 1.2rem;
  border: 1px dashed var(--c-line);
  border-radius: var(--radius-sm);
  color: var(--faq-text-soft);
  font-size: var(--step-14);
  line-height: 1.7;
}

.page-faq .faq-empty[hidden] {
  display: none;
}

/* ---------- 分类跳转条 ---------- */
.page-faq .faq-body {
  position: relative;
}

.page-faq .faq-jump {
  position: sticky;
  top: calc(var(--header-h) + 8px);
  z-index: 6;
  padding: 0.55rem 0;
  margin-bottom: clamp(0.5rem, 2vw, 1rem);
  border-bottom: 1px solid var(--c-line-soft);
  background: rgba(6, 35, 28, 0.9);
  backdrop-filter: blur(12px);
}

.page-faq .faq-jump-track {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-bottom: 2px;
}

.page-faq .faq-jump-track::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-jump-chip {
  flex: 0 0 auto;
  display: inline-block;
  font-size: var(--step-14);
  line-height: 1;
  white-space: nowrap;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  color: var(--c-fog);
  background: var(--c-glass);
  text-decoration: none;
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease;
}

.page-faq .faq-jump-chip:hover,
.page-faq .faq-jump-chip:focus-visible {
  color: var(--c-accent);
  border-color: var(--c-accent);
  background: rgba(61, 242, 200, 0.10);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding: var(--faq-gap) 0;
  border-top: 1px solid var(--c-line-soft);
  scroll-margin-top: calc(var(--header-h) + 76px);
}

.page-faq .section-kicker {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: 0.14em;
  color: var(--c-ash);
}

.page-faq .faq-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.8rem;
  height: 1.8rem;
  padding: 0 0.4rem;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: 0.04em;
  color: var(--c-accent);
}

.page-faq .faq-group .section-title {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.6vw, 2.4rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--c-fog);
  margin: 0.7rem 0 0.65rem;
  max-width: 22ch;
}

.page-faq .section-lede {
  max-width: 52ch;
  margin: 0;
  font-size: var(--step-16);
  line-height: 1.8;
  color: var(--faq-text-soft);
}

.page-faq .section-lede a,
.page-faq .faq-a a {
  color: var(--c-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 200, 0.4);
}

.page-faq .section-lede a:hover,
.page-faq .faq-a a:hover {
  border-bottom-color: var(--c-accent);
}

.page-faq .faq-group-visual {
  margin: 0 auto 1.75rem;
  max-width: 280px;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-carbon);
}

.page-faq .faq-group-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: 340px;
  object-fit: cover;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  list-style: none;
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
  max-width: 78ch;
}

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

.page-faq .faq-item {
  position: relative;
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius-sm);
  background: rgba(11, 15, 14, 0.4);
  transition: border-color 180ms ease, background 180ms ease;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: transparent;
  transition: background 180ms ease;
}

.page-faq .faq-item[open] {
  border-color: var(--c-line);
  background: rgba(16, 58, 46, 0.5);
}

.page-faq .faq-item[open]::before {
  background: var(--c-accent);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.05rem 1.1rem 1.05rem 1.35rem;
  cursor: pointer;
  list-style: none;
  font-size: var(--step-16);
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-fog);
}

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

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

.page-faq .faq-q-mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 0.35rem;
}

.page-faq .faq-q-mark::before,
.page-faq .faq-q-mark::after {
  content: "";
  position: absolute;
  background: var(--c-accent);
  border-radius: 1px;
  transition: transform 180ms ease;
}

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

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

.page-faq .faq-item[open] .faq-q-mark::after {
  transform: scaleY(0);
}

.page-faq .faq-a {
  padding: 0 1.35rem 1.35rem;
  max-width: var(--faq-answer-width);
  font-size: var(--step-16);
  line-height: 1.8;
  color: var(--faq-text-soft);
}

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

.page-faq .faq-steps {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.55rem;
  align-items: start;
  font-size: var(--step-14);
  line-height: 1.75;
  padding-top: 0.5rem;
  border-top: 1px dashed rgba(61, 242, 200, 0.16);
}

.page-faq .faq-step-no {
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: 0.08em;
  color: var(--c-accent);
  padding-top: 0.2rem;
}

/* ---------- 支持区块 ---------- */
.page-faq .faq-group--help {
  border-top: 0;
  padding-bottom: clamp(1rem, 3vw, 2rem);
}

.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(61, 242, 200, 0.16), transparent 55%),
    linear-gradient(160deg, rgba(16, 58, 46, 0.9), rgba(11, 15, 14, 0.92));
}

.page-faq .faq-help::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -55%;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 47, 0.16), transparent 65%);
  pointer-events: none;
}

.page-faq .faq-help .section-head {
  position: relative;
  z-index: 1;
}

.page-faq .faq-prepare {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 1.5rem 0 1.75rem;
  padding: 0;
  max-width: 64ch;
  display: grid;
  gap: 0.75rem;
}

.page-faq .faq-prepare li {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: 0.6rem;
  align-items: baseline;
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--faq-text-soft);
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed rgba(61, 242, 200, 0.18);
}

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

.page-faq .faq-prepare-no {
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: 0.08em;
  color: var(--c-signal);
}

.page-faq .faq-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-steps li {
    grid-template-columns: 2.5rem minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-group--install {
    display: grid;
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: clamp(1.75rem, 4vw, 3rem);
    align-items: start;
  }

  .page-faq .faq-group--install .faq-group-visual {
    max-width: none;
    margin: 0;
  }

  .page-faq .faq-group--install .faq-group-visual img {
    max-height: none;
  }

  .page-faq .faq-group--install .faq-list {
    margin-top: 1.75rem;
  }

  .page-faq .faq-group--install .section-title {
    max-width: 20ch;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-body {
    display: block;
  }

  .page-faq .faq-list {
    max-width: 82ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item::before,
  .page-faq .faq-q-mark::after,
  .page-faq .faq-jump-chip,
  .page-faq .faq-search-input {
    transition: none;
  }
}