.page-faq {
  --faq-gap: clamp(1.25rem, 3vw, 2.5rem);
  --faq-pad: clamp(1.15rem, 3vw, 2rem);
  --faq-hair: rgba(243, 233, 210, 0.14);
  --faq-hair-strong: rgba(243, 233, 210, 0.32);
  position: relative;
  background:
    radial-gradient(1100px 520px at 88% -8%, rgba(215, 38, 61, 0.2), transparent 62%),
    radial-gradient(720px 420px at -12% 14%, rgba(44, 62, 80, 0.6), transparent 60%),
    var(--lt-ink);
  color: var(--lt-cream);
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  font-family: var(--lt-font-cn);
  letter-spacing: 0.01em;
  margin: 0;
}

.page-faq p {
  margin: 0;
}

.page-faq .lt-section {
  padding-block: clamp(2.25rem, 6vw, 4.5rem);
}

/* ---------- 首屏 ---------- */

.faq-hero {
  padding: clamp(1.75rem, 5vw, 4rem) 0 clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--faq-hair);
}

.faq-hero__inner {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

@media (min-width: 1000px) {
  .faq-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(2rem, 4vw, 4rem);
  }
}

.faq-hero__copy .lt-breadcrumb {
  margin-bottom: 1rem;
}

.faq-hero h1 {
  margin: 0.5rem 0 1rem;
  font-size: clamp(1.95rem, 6vw, 3.7rem);
  line-height: 1.1;
  font-weight: 800;
  color: var(--lt-cream);
}

.faq-hero .lt-lede {
  max-width: 54ch;
  color: var(--lt-text-soft);
}

.faq-hero__figure {
  margin: 0;
}

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

/* ---------- 搜索 ---------- */

.faq-search {
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.faq-search__label {
  display: block;
  margin-bottom: 0.6rem;
  font-family: var(--lt-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lt-gold);
}

.faq-search__box {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.7rem 0.9rem;
  background: linear-gradient(180deg, rgba(46, 36, 36, 0.96), rgba(26, 20, 22, 0.96));
  border: 1px solid var(--faq-hair-strong);
  border-left: 3px solid var(--lt-red);
  box-shadow: 0 22px 44px -32px rgba(0, 0, 0, 0.95);
  transition: border-color 0.25s var(--lt-ease), transform 0.25s var(--lt-ease);
}

.faq-search__box:focus-within {
  border-color: var(--lt-red);
  transform: translateY(-2px);
}

.faq-search__icon {
  flex: none;
  width: 22px;
  height: 22px;
  color: var(--lt-red);
}

.faq-search__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.4rem 0;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--lt-cream);
  font-family: var(--lt-font-mono);
  font-size: clamp(0.95rem, 2.4vw, 1.15rem);
}

.faq-search__input::placeholder {
  color: var(--lt-mist);
}

.faq-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-top: 1rem;
}

.faq-tags__label {
  font-family: var(--lt-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--lt-mist);
}

.faq-tags .lt-tag {
  text-decoration: none;
}

/* ---------- 通用栏目标题 ---------- */

.faq-head {
  max-width: 60ch;
  margin-bottom: clamp(1.5rem, 3.5vw, 2.5rem);
}

.faq-head h2 {
  margin: 0.55rem 0 0.85rem;
  font-size: clamp(1.45rem, 3.6vw, 2.35rem);
  line-height: 1.16;
  font-weight: 800;
}

.faq-head .lt-prose {
  color: var(--lt-text-soft);
}

/* ---------- 步骤路线 ---------- */

.faq-route {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

@media (min-width: 940px) {
  .faq-route {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

.faq-route__item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.5rem 1.1rem 1.15rem;
  background: linear-gradient(180deg, rgba(46, 36, 36, 0.94), rgba(26, 20, 22, 0.94));
  border: 1px solid var(--faq-hair);
  transition: transform 0.25s var(--lt-ease), border-color 0.25s var(--lt-ease);
}

.faq-route__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1.1rem;
  width: 1.6rem;
  height: 3px;
  background: var(--lt-red);
}

.faq-route__item:nth-child(2)::before { background: var(--lt-gold); }
.faq-route__item:nth-child(3)::before { background: var(--lt-teal); }
.faq-route__item:nth-child(4)::before { background: var(--lt-gold); }
.faq-route__item:nth-child(5)::before { background: var(--lt-red); }

.faq-route__item:hover,
.faq-route__item:focus-within {
  transform: translateY(-4px);
  border-color: var(--lt-red);
}

.faq-route__num {
  font-family: var(--lt-font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  color: var(--lt-gold);
}

.faq-route__item h3 {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.3;
}

.faq-route__item p {
  color: var(--lt-text-soft);
  font-size: 0.9rem;
  line-height: 1.7;
}

.faq-route__link {
  margin-top: auto;
  align-self: flex-start;
  font-family: var(--lt-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--lt-red);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--lt-ease), border-color 0.2s var(--lt-ease);
}

.faq-route__link:hover,
.faq-route__link:focus-visible {
  color: var(--lt-gold);
  border-bottom-color: var(--lt-gold);
}

/* ---------- 分区坐标索引 ---------- */

.faq-axis {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  padding: 0.9rem 0;
  border-top: 1px solid var(--faq-hair);
  border-bottom: 1px solid var(--faq-hair);
}

.faq-axis__label {
  margin-bottom: 0.6rem;
  font-family: var(--lt-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lt-mist);
}

.faq-axis__track {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.faq-axis__item {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--faq-hair);
  color: var(--lt-text-soft);
  font-family: var(--lt-font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: border-color 0.22s var(--lt-ease), color 0.22s var(--lt-ease), background-color 0.22s var(--lt-ease);
}

.faq-axis__item:hover,
.faq-axis__item:focus-visible {
  border-color: var(--lt-red);
  color: var(--lt-cream);
  background: rgba(215, 38, 61, 0.12);
}

.faq-axis__tick {
  width: 7px;
  height: 7px;
  background: var(--lt-gold);
  transform: rotate(45deg);
}

/* ---------- 安装 ---------- */

.faq-install__grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 880px) {
  .faq-install__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.faq-mode {
  padding: var(--faq-pad);
  background: linear-gradient(180deg, rgba(46, 36, 36, 0.94), rgba(26, 20, 22, 0.94));
  border: 1px solid var(--faq-hair);
  border-top: 3px solid var(--lt-red);
}

.faq-mode--paper {
  background: var(--lt-paper);
  border: 1px solid var(--lt-gold);
  border-top: 3px solid var(--lt-gold);
  color: var(--lt-ink-2);
}

.faq-mode__size {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  margin: 0.85rem 0 0.6rem;
  font-family: var(--lt-font-mono);
  font-size: clamp(2.1rem, 6vw, 3.2rem);
  line-height: 1;
  font-weight: 700;
  color: var(--lt-red);
}

.faq-mode__size span {
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  color: var(--lt-mist);
}

.faq-mode--paper .faq-mode__size {
  color: var(--lt-red-deep);
}

.faq-mode--paper .faq-mode__size span {
  color: rgba(46, 36, 36, 0.55);
}

.faq-mode h3 {
  margin-bottom: 0.85rem;
  font-size: 1.1rem;
  line-height: 1.35;
}

.faq-mode__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.faq-mode__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--lt-text-soft);
}

.faq-mode--paper .faq-mode__list li {
  color: rgba(46, 36, 36, 0.82);
}

.faq-mode__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: var(--lt-teal);
}

.faq-mode--paper .faq-mode__list li::before {
  background: var(--lt-red-deep);
}

.faq-guard {
  display: grid;
  gap: 1.1rem;
  margin-top: 1rem;
  padding: var(--faq-pad);
  border-left: 3px solid var(--lt-red);
  background: rgba(44, 62, 80, 0.42);
}

@media (min-width: 880px) {
  .faq-guard {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.faq-guard__item h3 {
  margin-bottom: 0.45rem;
  font-size: 1rem;
  color: var(--lt-gold);
}

.faq-guard__item p {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--lt-text-soft);
}

/* ---------- 多端切换 ---------- */

.faq-switch__inner {
  display: grid;
  gap: var(--faq-gap);
}

@media (min-width: 960px) {
  .faq-switch__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
    align-items: center;
    gap: clamp(2rem, 5vw, 4rem);
  }
}

.faq-switch__copy h2 {
  margin: 0.55rem 0 0.85rem;
  font-size: clamp(1.45rem, 3.6vw, 2.35rem);
  line-height: 1.16;
  font-weight: 800;
}

.faq-switch__copy .lt-prose {
  color: var(--lt-text-soft);
}

.faq-ways {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
}

.faq-way {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.35rem 1rem;
  padding: 1rem 0;
  border-bottom: 1px dashed var(--faq-hair);
}

.faq-way__num {
  font-family: var(--lt-font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: var(--lt-gold);
  padding-top: 0.2rem;
}

.faq-way h3 {
  margin-bottom: 0.35rem;
  font-size: 1rem;
}

.faq-way p {
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--lt-text-soft);
}

.faq-switch__note {
  margin-top: 1.2rem;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--lt-teal);
  background: rgba(42, 157, 143, 0.1);
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--lt-cream);
}

.faq-switch__figure {
  margin: 0;
}

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

/* ---------- 问答分组 ---------- */

.faq-groups {
  display: grid;
  gap: 1rem;
}

@media (min-width: 1000px) {
  .faq-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

.faq-group {
  padding: var(--faq-pad);
  background: linear-gradient(180deg, rgba(46, 36, 36, 0.9), rgba(26, 20, 22, 0.9));
  border: 1px solid var(--faq-hair);
}

.faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin-bottom: 0.9rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--faq-hair);
}

.faq-group__code {
  font-family: var(--lt-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--lt-red);
}

.faq-group__head h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.faq-q {
  border-top: 1px solid rgba(243, 233, 210, 0.08);
}

.faq-q:first-of-type {
  border-top: 0;
}

.faq-q summary {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.85rem 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--lt-font-cn);
  font-size: 0.97rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--lt-cream);
  transition: color 0.2s var(--lt-ease);
}

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

.faq-q summary:hover,
.faq-q summary:focus-visible {
  color: var(--lt-red);
}

.faq-q summary::after {
  content: "＋";
  flex: none;
  font-family: var(--lt-font-mono);
  color: var(--lt-gold);
}

.faq-q[open] summary::after {
  content: "－";
  color: var(--lt-red);
}

.faq-q__body {
  padding: 0 0 1rem;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--lt-text-soft);
  border-left: 2px solid rgba(215, 38, 61, 0.5);
  padding-left: 0.9rem;
  margin-bottom: 0.35rem;
}

/* ---------- 结尾行动 ---------- */

.faq-cta {
  display: grid;
  gap: 1.25rem;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1px solid var(--lt-red);
  background: linear-gradient(120deg, rgba(215, 38, 61, 0.18), rgba(44, 62, 80, 0.55));
}

@media (min-width: 840px) {
  .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

.faq-cta h2 {
  margin: 0.5rem 0 0.75rem;
  font-size: clamp(1.3rem, 3vw, 1.95rem);
  line-height: 1.2;
  font-weight: 800;
}

.faq-cta .lt-prose {
  color: var(--lt-text-soft);
  max-width: 56ch;
}

.faq-cta__act {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

@media (max-width: 520px) {
  .faq-route__item,
  .faq-mode,
  .faq-group,
  .faq-guard,
  .faq-cta {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .faq-search__box {
    flex-wrap: nowrap;
  }

  .faq-search__input {
    font-size: 0.92rem;
  }
}