.page-faq {
  --faq-index-w: 242px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(1.5rem, 4vw, 3rem);
  padding-bottom: clamp(1.75rem, 4.5vw, 3.5rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(58% 78% at 10% 4%, rgba(43, 227, 160, 0.15), transparent 62%),
    linear-gradient(116deg, rgba(22, 59, 49, 0.94) 0%, rgba(22, 59, 49, 0.4) 48%, rgba(11, 31, 26, 0) 78%);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    column-gap: clamp(2rem, 5vw, 4.5rem);
  }
}

.page-faq .faq-hero__main .index-tag {
  margin-bottom: 0.9rem;
}

.page-faq .faq-hero .page-title {
  margin: 0 0 1rem;
  font-size: clamp(1.85rem, 5.6vw, 3.35rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.16;
  color: var(--paper);
}

.page-faq .faq-hero .page-lede {
  max-width: 48ch;
  margin: 0;
  font-size: clamp(0.96rem, 1.6vw, 1.08rem);
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero__aside {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1.05rem 1.1rem 1.15rem;
  background: linear-gradient(150deg, rgba(17, 20, 23, 0.78), rgba(11, 31, 26, 0.5));
}

.page-faq .faq-hero__aside-label {
  margin: 0 0 0.7rem;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .faq-quicklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}

.page-faq .faq-quicklist a {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  padding: 0.45rem 0.4rem;
  border-radius: var(--radius-sm);
  color: var(--paper);
  font-size: 0.92rem;
  line-height: 1.5;
  text-decoration: none;
  transition: background 0.22s var(--ease-soft), color 0.22s var(--ease-soft);
}

.page-faq .faq-quicklist a:hover,
.page-faq .faq-quicklist a:focus-visible {
  background: rgba(43, 227, 160, 0.09);
  color: var(--loud);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 2.5rem);
  padding-bottom: clamp(3rem, 7vw, 5.5rem);
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    column-gap: clamp(2rem, 5vw, 4.25rem);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  border-top: 2px solid var(--neon);
  padding-top: 0.85rem;
}

.page-faq .faq-index__title {
  margin: 0 0 0.75rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}

.page-faq .faq-index__list a {
  display: flex;
  gap: 0.65rem;
  align-items: baseline;
  padding: 0.5rem 0.7rem;
  border-left: 2px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--mist);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.22s var(--ease-soft), border-color 0.22s var(--ease-soft), background 0.22s var(--ease-soft);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--paper);
  border-left-color: var(--neon);
  background: rgba(43, 227, 160, 0.08);
}

.page-faq .faq-index__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--neon);
  opacity: 0.82;
}

.page-faq .faq-index__hint {
  margin: 1rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--line);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-index__hint a {
  color: var(--amber);
  text-underline-offset: 3px;
}

/* ---------- 右侧问答 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(2.25rem, 5vw, 3.5rem);
  min-width: 0;
}

.page-faq .faq-section {
  scroll-margin-top: 108px;
  min-width: 0;
}

.page-faq .faq-section__head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding-bottom: 0.7rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section__num {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.2vw, 1.45rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--neon);
}

.page-faq .faq-section__head h2 {
  margin: 0;
  font-size: clamp(1.24rem, 3vw, 1.72rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--paper);
}

.page-faq .faq-figure {
  margin: 0 0 1.4rem;
}

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

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  margin-bottom: 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(22, 59, 49, 0.6), rgba(17, 20, 23, 0.4));
  transition: border-color 0.28s var(--ease-soft), background 0.28s var(--ease-soft);
}

.page-faq .faq-item[open] {
  border-color: rgba(43, 227, 160, 0.34);
  background: linear-gradient(160deg, rgba(22, 59, 49, 0.92), rgba(17, 20, 23, 0.7));
}

.page-faq .faq-item > summary {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  padding: 1.02rem 1.1rem;
  list-style: none;
  cursor: pointer;
  font-size: clamp(0.95rem, 1.6vw, 1.02rem);
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper);
}

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

.page-faq .faq-item > summary:hover {
  color: var(--loud);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -2px;
  border-radius: var(--radius-md);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 0.16rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  top: 50%;
  height: 1.5px;
  background: var(--neon);
  transform: translateY(-50%);
  transition: transform 0.3s var(--ease-soft);
}

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

.page-faq .faq-item[open] .faq-item__mark {
  border-color: rgba(43, 227, 160, 0.6);
}

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

.page-faq .faq-item__body {
  padding: 0 1.1rem 1.15rem 3.15rem;
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--mist);
}

.page-faq .faq-item__body p {
  margin: 0 0 0.7rem;
}

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

.page-faq .faq-item__body a {
  color: var(--loud);
  text-underline-offset: 3px;
  text-decoration-color: rgba(43, 227, 160, 0.42);
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.9rem;
}

.page-faq .faq-chip {
  padding: 0.26rem 0.72rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--loud);
  background: rgba(43, 227, 160, 0.06);
}

@media (max-width: 700px) {
  .page-faq .faq-item__body {
    padding-left: 1.1rem;
  }
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-support {
  border-radius: var(--radius-lg);
  padding: clamp(1.4rem, 4vw, 2.6rem);
}

.page-faq .faq-support h2 {
  margin: 0.6rem 0 0.75rem;
  font-size: clamp(1.32rem, 3.2vw, 1.95rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-support p {
  margin: 0 0 1.1rem;
  max-width: 58ch;
  line-height: 1.78;
  color: rgba(11, 31, 26, 0.76);
}

.page-faq .faq-support__list {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-support__list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.12rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px dashed var(--paper-line);
}

@media (min-width: 640px) {
  .page-faq .faq-support__list li {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }
}

.page-faq .faq-support__k {
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: rgba(11, 31, 26, 0.55);
}

.page-faq .faq-support__v {
  font-size: 0.95rem;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-support__cta {
  margin: 0 0 1.1rem;
}

.page-faq .faq-support__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.3rem;
  margin: 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--paper-line);
}

.page-faq .faq-support__links a {
  font-size: 0.86rem;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 111, 92, 0.4);
  padding-bottom: 1px;
}

.page-faq .faq-support__links a:hover,
.page-faq .faq-support__links a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ---------- 动效兼容 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-index__list a,
  .page-faq .faq-quicklist a {
    transition-duration: 0.01ms !important;
  }
}