.page-faq {
  --faq-rail: 272px;
  --faq-gap: clamp(1.5rem, 4vw, 3.25rem);
  position: relative;
  padding-block: 0 clamp(3rem, 8vw, 6rem);
  background:
    radial-gradient(880px 480px at 88% -6%, rgba(53, 228, 208, 0.07), transparent 66%),
    radial-gradient(720px 440px at 4% 10%, rgba(242, 179, 71, 0.055), transparent 70%);
  overflow-x: clip;
}

.page-faq .eyebrow {
  font-family: var(--font-latin);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-400);
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(2.25rem, 6vw, 4.5rem) clamp(2rem, 5vw, 3.5rem);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -90px;
  width: min(560px, 68vw);
  height: 340px;
  background: linear-gradient(132deg, rgba(53, 228, 208, 0.15), rgba(242, 179, 71, 0.11));
  transform: rotate(-8deg);
  filter: blur(3px);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-400) 18%, var(--line-400) 82%, transparent);
  transform: rotate(-1.4deg);
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 0.6rem 0 1rem;
  font-size: clamp(2rem, 6.4vw, 4.15rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 800;
  max-width: 17ch;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 34ch;
  color: var(--text-400);
  font-size: 1rem;
  line-height: 1.85;
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-400);
  border: 1px solid var(--line-400);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-fact {
  --accent: var(--cyan-400);
  background: linear-gradient(180deg, rgba(10, 18, 36, 0.88), rgba(6, 11, 22, 0.92));
  padding: 0.95rem 1.05rem 1rem;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "key val"
    "sub sub";
  align-items: baseline;
  gap: 0.3rem 0.9rem;
  border-left: 2px solid var(--accent);
}

.page-faq .faq-fact--gold {
  --accent: var(--gold-400);
}

.page-faq .faq-fact__key {
  grid-area: key;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--text-400);
}

.page-faq .faq-fact__val {
  grid-area: val;
  justify-self: end;
  font-size: 1.6rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.page-faq .faq-fact__sub {
  grid-area: sub;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-400);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
  padding-top: clamp(0.5rem, 2vw, 1.25rem);
}

.page-faq .faq-content {
  display: grid;
  min-width: 0;
}

/* ---------- 索引栏 ---------- */
.page-faq .faq-rail {
  display: grid;
  gap: 1.1rem;
  align-content: start;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line-400);
}

.page-faq .faq-rail__media {
  margin: 0;
  border: 1px solid var(--line-400);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-rail__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.85);
}

.page-faq .faq-rail__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 0.35rem;
}

.page-faq .faq-rail__head .side-note__label {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--text-100);
}

.page-faq .faq-rail__meta {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--text-400);
}

.page-faq .faq-toc {
  display: grid;
  border-top: 1px solid var(--line-400);
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.7rem 0.4rem 0.7rem 0.75rem;
  border-bottom: 1px solid var(--line-400);
  border-left: 2px solid transparent;
  color: var(--text-400);
  text-decoration: none;
  font-size: 0.94rem;
  line-height: 1.5;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-toc__link:hover {
  color: var(--text-100);
  border-left-color: var(--gold-400);
  transform: translateX(3px);
}

.page-faq .faq-toc__link[aria-current="true"] {
  color: var(--cyan-400);
  border-left-color: var(--cyan-400);
}

.page-faq .faq-toc__num {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--cyan-400);
  min-width: 1.45rem;
}

.page-faq .faq-rail__note {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--text-400);
  border-left: 1px solid var(--line-400);
  padding-left: 0.75rem;
}

/* ---------- 章节头 ---------- */
.page-faq .faq-section {
  padding-block: clamp(1.5rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line-400);
  scroll-margin-top: 6.5rem;
}

.page-faq .faq-section:first-child {
  border-top-color: var(--cyan-400);
}

.page-faq .faq-head {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: clamp(1rem, 3vw, 1.6rem);
}

.page-faq .faq-head__no {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--cyan-400);
  border: 1px solid var(--cyan-700);
  border-radius: var(--radius);
  padding: 0.18rem 0.4rem;
}

.page-faq .faq-head__title {
  margin: 0;
  font-size: clamp(1.3rem, 3.2vw, 1.85rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 700;
  white-space: nowrap;
}

.page-faq .faq-head__line {
  height: 1px;
  background: linear-gradient(90deg, var(--line-400), transparent);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line-400);
}

.page-faq .faq-item__head {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.95rem 0.3rem;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--dur) var(--ease);
}

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

.page-faq .faq-item__head:hover {
  background: var(--accent-soft, rgba(53, 228, 208, 0.05));
}

.page-faq .faq-item__head:focus-visible {
  outline: 1px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .faq-item__no {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--text-400);
}

.page-faq .faq-item__q {
  font-size: 1rem;
  line-height: 1.6;
  font-weight: 600;
  color: var(--text-100);
}

.page-faq .faq-item__mark {
  position: relative;
  width: 14px;
  height: 14px;
  align-self: center;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  inset: 50% 0 auto 0;
  height: 1px;
  background: var(--cyan-400);
  transform: translateY(-50%);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-item__mark::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--cyan-400);
}

.page-faq .faq-item__body {
  display: grid;
  gap: 0.6rem;
  padding: 0 0.3rem 1.15rem;
}

.page-faq .faq-item__body p {
  margin: 0;
  max-width: 34em;
  color: var(--text-400);
  font-size: 0.95rem;
  line-height: 1.9;
}

/* ---------- 存储示意 ---------- */
.page-faq .faq-store-figure {
  margin: 1.4rem 0 0;
  padding: 1rem 1.1rem 0.9rem;
  background: var(--ink-700);
  border: 1px solid var(--line-400);
  border-radius: var(--radius);
}

.page-faq .faq-store {
  display: block;
  width: 100%;
  height: auto;
  max-width: 420px;
}

.page-faq .faq-store-figure__cap {
  margin: 0.6rem 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--text-400);
}

/* ---------- 配置对照 ---------- */
.page-faq .faq-cfg-media {
  margin: 0 0 1.4rem;
  border: 1px solid var(--line-400);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-cfg-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.9);
}

.page-faq .cfg-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-400);
  border: 1px solid var(--line-400);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.page-faq .cfg-card {
  --accent: var(--cyan-400);
  background: var(--ink-700);
  padding: 1.1rem 1.05rem 1.15rem;
  border-top: 2px solid var(--accent);
}

.page-faq .cfg-card--gold {
  --accent: var(--gold-400);
}

.page-faq .cfg-card__head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin-bottom: 0.85rem;
}

.page-faq .cfg-card__tag {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 0.14rem 0.35rem;
}

.page-faq .cfg-card__name {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-100);
}

.page-faq .cfg-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-faq .cfg-card__list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.48rem 0;
  border-bottom: 1px solid var(--line-400);
  font-size: 0.88rem;
  color: var(--text-400);
}

.page-faq .cfg-card__val {
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-100);
  white-space: nowrap;
}

.page-faq .cfg-card__scene {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 0.84rem;
  line-height: 1.8;
  color: var(--text-400);
  border-top: 1px dashed var(--line-400);
  transition: max-height 320ms var(--ease), opacity 240ms var(--ease), margin-top 320ms var(--ease), padding-top 320ms var(--ease);
}

.page-faq .cfg-card:hover .cfg-card__scene,
.page-faq .cfg-card:focus-within .cfg-card__scene {
  max-height: 9rem;
  opacity: 1;
  margin-top: 0.85rem;
  padding-top: 0.75rem;
}

/* ---------- 尾部说明与返回 ---------- */
.page-faq .faq-more {
  margin: 1.4rem 0 0;
  max-width: 40em;
  font-size: 0.92rem;
  line-height: 1.9;
  color: var(--text-400);
}

.page-faq .faq-more a {
  color: var(--text-100);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-700);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-more a:hover {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.page-faq .faq-backline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.6rem;
  margin: clamp(2rem, 5vw, 3rem) 0 0;
}

.page-faq .faq-back {
  display: inline-flex;
  align-items: center;
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  color: var(--text-100);
  text-decoration: none;
  padding-left: 0.7rem;
  border-left: 2px solid var(--cyan-400);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-back:hover {
  color: var(--gold-400);
  border-left-color: var(--gold-400);
  transform: translateX(4px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .cfg-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-item__body {
    padding-left: 3rem;
  }

  .page-faq .faq-item__head {
    grid-template-columns: 2.4rem minmax(0, 1fr) auto;
    padding-inline: 0.3rem 0.3rem;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 5.75rem;
    max-height: calc(100vh - 7.5rem);
    overflow-y: auto;
    padding-bottom: 0;
    border-bottom: 0;
    scrollbar-width: thin;
  }

  .page-faq .faq-section {
    padding-block: clamp(2rem, 3.5vw, 3rem);
  }
}

@media (hover: none) {
  .page-faq .cfg-card__scene {
    max-height: 9rem;
    opacity: 1;
    margin-top: 0.85rem;
    padding-top: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .cfg-card__scene,
  .page-faq .faq-back,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after {
    transition: none;
  }

  .page-faq .faq-toc__link:hover,
  .page-faq .faq-back:hover {
    transform: none;
  }
}