.page-faq {
  position: relative;
  background: var(--ink-950);
  color: var(--slate-body);
  padding-bottom: clamp(3rem, 6vw, 5rem);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 clamp(2rem, 5vw, 3.25rem);
  border-bottom: 1px solid var(--line-dark);
  background:
    radial-gradient(76% 72% at 80% 0%, rgba(124, 108, 255, 0.20), transparent 62%),
    radial-gradient(58% 62% at 6% 6%, rgba(43, 227, 218, 0.13), transparent 60%),
    var(--ink-950);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(168, 193, 224, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 193, 224, 0.055) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(82% 100% at 50% 0%, #000 18%, transparent 82%);
  mask-image: radial-gradient(82% 100% at 50% 0%, #000 18%, transparent 82%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
  font-size: 0.8125rem;
  color: var(--slate-dim);
}

.page-faq .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 0.35rem;
  opacity: 0.55;
}

.page-faq .breadcrumb__list a {
  color: var(--mist-blue);
  text-decoration: none;
}

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

.page-faq .faq-hero__title {
  margin: 0.35rem 0 0;
  max-width: 15ch;
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--content-paper);
}

.page-faq .faq-hero__lede {
  max-width: 56ch;
  margin: 1.1rem 0 0;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  line-height: 1.8;
  color: var(--slate-body);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__meta li {
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  background: rgba(14, 23, 48, 0.66);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--mist-blue);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 1.75rem;
  padding-top: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail__title {
  margin: 0 0 0.6rem;
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--slate-dim);
  text-transform: uppercase;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 0.4rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  background: var(--panel-800);
  color: var(--mist-blue);
  font-size: 0.875rem;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-rail__link .mono {
  font-size: 0.6875rem;
  color: var(--signal-amber);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--content-paper);
  border-color: rgba(43, 227, 218, 0.45);
}

.page-faq .faq-rail__link[aria-current] {
  color: var(--ink-950);
  background: var(--neon-cyan);
  border-color: var(--neon-cyan);
  font-weight: 600;
}

.page-faq .faq-rail__link[aria-current] .mono {
  color: var(--cyan-ink);
}

.page-faq .faq-body {
  min-width: 0;
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .filter-btn {
  padding: 0.42rem 0.9rem;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  background: transparent;
  color: var(--mist-blue);
  font: inherit;
  font-size: 0.8125rem;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .filter-btn:hover,
.page-faq .filter-btn:focus-visible {
  color: var(--content-paper);
  border-color: rgba(43, 227, 218, 0.45);
}

.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--neon-cyan);
  border-color: var(--neon-cyan);
  color: #05201f;
  font-weight: 600;
}

.page-faq .filter-count {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--slate-dim);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(2.25rem, 5vw, 3.5rem);
  scroll-margin-top: 6.5rem;
}

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

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.3rem 1rem;
  align-items: baseline;
  padding-bottom: 0.85rem;
  margin-bottom: 1.15rem;
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-group__num {
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--neon-cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.3rem, 2.6vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--content-paper);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--slate-dim);
}

/* ---------- 展开组 ---------- */
.page-faq .disclosure {
  margin-bottom: 0.6rem;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: var(--panel-800);
  overflow: hidden;
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-faq .disclosure[data-open] {
  background: var(--content-paper);
  border-color: var(--paper-line);
  box-shadow: var(--shadow-lift);
}

.page-faq .disclosure__toggle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.85rem;
  align-items: start;
  width: 100%;
  padding: 1rem 1.1rem;
  border: 0;
  background: none;
  color: var(--content-paper);
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color 0.22s var(--ease);
}

.page-faq .disclosure__toggle:focus-visible {
  outline: 2px solid var(--neon-cyan);
  outline-offset: -3px;
}

.page-faq .disclosure[data-open] .disclosure__toggle {
  color: var(--ink-text);
}

.page-faq .faq-q__no {
  padding-top: 0.28rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--neon-cyan);
}

.page-faq .disclosure[data-open] .faq-q__no {
  color: var(--cyan-ink);
}

.page-faq .disclosure__sign {
  position: relative;
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.3rem;
}

.page-faq .disclosure__sign::before,
.page-faq .disclosure__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--neon-cyan);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease), background 0.22s var(--ease);
}

.page-faq .disclosure__sign::before {
  width: 12px;
  height: 2px;
}

.page-faq .disclosure__sign::after {
  width: 2px;
  height: 12px;
}

.page-faq .disclosure[data-open] .disclosure__sign::before,
.page-faq .disclosure[data-open] .disclosure__sign::after {
  background: var(--cyan-ink);
}

.page-faq .disclosure[data-open] .disclosure__sign::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.page-faq .disclosure__inner {
  padding: 0 1.1rem 1.15rem;
}

.page-faq .disclosure__body {
  max-width: 68ch;
  padding-left: 1rem;
  border-left: 2px solid rgba(168, 193, 224, 0.28);
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--mist-blue);
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-faq .disclosure[data-open] .disclosure__body {
  color: var(--ink-text-soft);
  border-left-color: var(--paper-line);
}

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

.page-faq .disclosure__body p + p {
  margin-top: 0.7rem;
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: 1.5rem 0 0;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  background: var(--panel-800);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--line-dark);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--mist-blue);
}

/* ---------- 联系块 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.4rem;
  padding: 1.2rem;
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--signal-amber);
  border-radius: var(--radius);
  background: var(--panel-800);
}

.page-faq .contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.75rem;
  min-width: 0;
}

.page-faq .contact-line__label {
  width: 100%;
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--slate-dim);
}

.page-faq .contact-line__value {
  font-size: 0.9375rem;
  color: var(--content-paper);
  word-break: break-word;
}

.page-faq .contact-line--address .contact-line__value {
  font-family: var(--font-sans);
  color: var(--mist-blue);
}

.page-faq .copy-btn {
  padding: 0.28rem 0.7rem;
  border: 1px solid rgba(43, 227, 218, 0.45);
  border-radius: 999px;
  background: rgba(43, 227, 218, 0.1);
  color: var(--neon-cyan);
  font: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  background: rgba(43, 227, 218, 0.2);
}

.page-faq .copy-btn[data-copied] {
  background: var(--signal-green);
  border-color: var(--signal-green);
  color: #04240f;
  font-weight: 600;
}

.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin: 1.1rem 0 0;
  padding: 0;
}

.page-faq .faq-help__links a {
  font-size: 0.875rem;
  color: var(--neon-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 218, 0.35);
  padding-bottom: 1px;
}

.page-faq .faq-help__links a:hover,
.page-faq .faq-help__links a:focus-visible {
  color: var(--content-paper);
  border-bottom-color: var(--content-paper);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(190px, 232px) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 6.5rem;
    padding-top: 0.25rem;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0.15rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    display: flex;
    padding: 0.55rem 0.8rem;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: none;
    white-space: normal;
  }

  .page-faq .faq-rail__link[aria-current] {
    background: rgba(43, 227, 218, 0.1);
    border-left-color: var(--neon-cyan);
    color: var(--content-paper);
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.1rem 1.5rem;
  }

  .page-faq .contact-line--address {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__title {
    font-size: clamp(3rem, 4.4vw, 4.25rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .disclosure,
  .page-faq .disclosure__toggle,
  .page-faq .disclosure__body,
  .page-faq .disclosure__sign::before,
  .page-faq .disclosure__sign::after,
  .page-faq .filter-btn,
  .page-faq .faq-rail__link,
  .page-faq .copy-btn {
    transition: none;
  }
}