.page-faq {
  --faq-cyan-line: rgba(43, 245, 212, 0.24);
  --faq-soft-line: rgba(138, 164, 200, 0.16);
  background: var(--ink-900);
  color: var(--text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.75rem, 4vw, 3rem) 0 clamp(2rem, 5vw, 3.5rem);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(108, 77, 255, 0.24), transparent 62%),
    radial-gradient(90% 70% at 6% 100%, rgba(43, 245, 212, 0.09), transparent 60%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-bottom: 1px solid var(--faq-soft-line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.4;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: center;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 1rem;
}

.page-faq .faq-hero h1 {
  margin: 0.55rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 6.2vw, 3.25rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-faq .faq-hero__lead {
  margin-top: clamp(0.9rem, 2.4vw, 1.25rem);
  max-width: 46rem;
  color: #bed2ea;
  font-size: clamp(0.95rem, 2.2vw, 1.06rem);
  line-height: 1.85;
}

.page-faq .faq-hero__media {
  position: relative;
  width: min(100%, 320px);
  margin-inline: auto;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--faq-cyan-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 36px), calc(100% - 36px) 100%, 0 100%);
  filter: drop-shadow(0 18px 44px rgba(43, 245, 212, 0.14));
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  opacity: 0.85;
}

/* ---------- 分类跳转 ---------- */
.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: clamp(1.2rem, 3vw, 1.75rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.4rem 0.75rem;
  font-size: 0.82rem;
  color: var(--mist);
  text-decoration: none;
  background: rgba(16, 42, 74, 0.4);
  border: 1px solid var(--faq-soft-line);
  border-radius: 1px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-chip__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  color: var(--gold);
  border-color: var(--line-gold);
  background: rgba(16, 42, 74, 0.7);
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  padding: clamp(2rem, 5vw, 4rem) 0 clamp(2.25rem, 6vw, 4.5rem);
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
}

.page-faq .faq-body__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  border-left: 2px solid var(--faq-cyan-line);
  padding-left: clamp(0.75rem, 2vw, 1.15rem);
}

.page-faq .faq-index__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.6rem 0.35rem 0.6rem 0;
  text-decoration: none;
  color: var(--mist);
  border-bottom: 1px dashed rgba(138, 164, 200, 0.14);
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

.page-faq .faq-index__label {
  font-size: 0.9rem;
  color: var(--text);
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--mist);
  opacity: 0.75;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--gold);
  padding-left: 0.35rem;
}

.page-faq .faq-index__link:hover .faq-index__label,
.page-faq .faq-index__link:focus-visible .faq-index__label {
  color: var(--gold);
}

.page-faq .faq-index__figure {
  margin: 1.25rem 0 0;
}

.page-faq .faq-index__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--faq-soft-line);
  background: var(--ink-700);
}

.page-faq .faq-index__caption {
  margin-top: 0.6rem;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(1.75rem, 4.5vw, 2.75rem);
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding-bottom: 0.75rem;
  margin-bottom: 0.9rem;
  border-bottom: 1px solid var(--faq-cyan-line);
}

.page-faq .faq-group__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1.3;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3.4vw, 1.6rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
}

.page-faq .faq-group__note {
  margin: 0.3rem 0 0;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  margin-bottom: 0.55rem;
  border: 1px solid var(--faq-soft-line);
  border-left: 2px solid rgba(43, 245, 212, 0.28);
  border-radius: 1px;
  background: linear-gradient(90deg, rgba(16, 42, 74, 0.62) 0%, rgba(11, 31, 58, 0.34) 100%);
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .qa[open] {
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(16, 42, 74, 0.88) 0%, rgba(11, 31, 58, 0.5) 100%);
}

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 0.7rem;
  padding: 0.9rem 0.9rem 0.9rem 0.85rem;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__summary:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 2px;
}

.page-faq .qa__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  line-height: 1.9;
  color: var(--cyan);
}

.page-faq .qa__q {
  font-size: clamp(0.94rem, 2.5vw, 1.04rem);
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
}

.page-faq .qa__mark {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 0.42em;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--gold);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

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

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

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  padding: 0 0.9rem 1.05rem 0.85rem;
  font-size: 0.94rem;
  line-height: 1.9;
  color: #c2d6ee;
}

.page-faq .qa__a p {
  margin: 0 0 0.65em;
}

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

.page-faq .qa__a a {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  color: var(--cyan);
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(2rem, 5vw, 3rem);
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 1px solid var(--line-gold);
  border-radius: 2px;
  background:
    radial-gradient(120% 130% at 0% 0%, rgba(108, 77, 255, 0.22), transparent 58%),
    linear-gradient(135deg, var(--panel) 0%, var(--ink-700) 100%);
}

.page-faq .faq-contact__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 3.2vw, 1.45rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: 0.85rem;
}

.page-faq .faq-contact__item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed rgba(138, 164, 200, 0.18);
}

.page-faq .faq-contact__key {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-contact__val {
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 1rem 0 0;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-contact__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem 1.5rem;
  }

  .page-faq .qa__summary {
    padding: 1rem 1.1rem 1rem 1rem;
  }

  .page-faq .qa__a {
    padding: 0 1.1rem 1.15rem calc(1rem + 2.1rem);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.72fr);
  }

  .page-faq .faq-hero__media {
    margin-inline: 0 0;
    justify-self: end;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__inner {
    grid-template-columns: clamp(220px, 24vw, 280px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-chip,
  .page-faq .faq-index__link {
    transition: none;
  }
}