/* ============ 问答中心 page-faq ============ */
.page-faq {
  --faq-maxw: 1180px;
  --faq-pad: 20px;
  --faq-index-w: 232px;
  display: block;
  position: relative;
}

@media (min-width: 768px) {
  .page-faq { --faq-pad: 36px; }
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--faq-pad) + 6px) var(--faq-pad) calc(var(--faq-pad) + 30px);
  background:
    radial-gradient(90% 120% at 94% -18%, rgba(122, 47, 240, 0.42) 0%, rgba(122, 47, 240, 0) 58%),
    radial-gradient(72% 90% at 2% 6%, rgba(61, 245, 142, 0.13) 0%, rgba(61, 245, 142, 0) 62%),
    linear-gradient(180deg, var(--ink-void) 0%, var(--ink-deep) 100%);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  bottom: -1px;
  height: 96px;
  background: linear-gradient(90deg, var(--magenta), var(--violet));
  opacity: 0.16;
  transform: skewY(-3deg);
  transform-origin: right bottom;
  pointer-events: none;
}

.page-faq .hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
  max-width: var(--faq-maxw);
  margin: 0 auto;
}

@media (min-width: 940px) {
  .page-faq .hero-inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    gap: 52px;
  }
}

.page-faq .hero-copy { min-width: 0; }

.page-faq .hero-eyebrow {
  margin: 18px 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-0);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 6.4vw, 3.5rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: 0.03em;
  color: var(--paper);
  text-wrap: balance;
}

.page-faq .hero-lede {
  margin: 0;
  max-width: 56ch;
  font-size: var(--fs-2);
  line-height: 1.85;
  color: rgba(232, 238, 247, 0.78);
}

.page-faq .hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .hero-media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--glass-line);
  background: var(--glass-soft);
}

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

.page-faq .media__caption {
  padding: 10px 16px 14px;
  font-size: var(--fs-0);
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* 首屏数据带 */
.page-faq .hero-facts {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  max-width: var(--faq-maxw);
  margin: 34px auto 0;
  padding: 0;
  list-style: none;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--glass-line);
}

@media (min-width: 760px) {
  .page-faq .hero-facts { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.page-faq .hero-facts li {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(11, 27, 58, 0.78);
}

.page-faq .hero-facts .num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--lime);
}

.page-faq .hero-facts li:nth-child(2) .num { color: var(--orange); }
.page-faq .hero-facts li:nth-child(3) .num { color: var(--gold); }
.page-faq .hero-facts li:nth-child(4) .num { color: var(--paper); }

.page-faq .hero-facts .lbl {
  font-size: var(--fs-0);
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 主体骨架：索引 + 问答 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 30px;
  max-width: var(--faq-maxw);
  margin: 0 auto;
  padding: calc(var(--faq-pad) + 8px) var(--faq-pad) 0;
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

/* 主题索引 */
.page-faq .faq-index {
  display: grid;
  gap: 14px;
  padding: 18px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--glass-line);
  background: var(--glass-soft);
  backdrop-filter: blur(10px);
}

@media (min-width: 1000px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--command-h) + 22px);
  }
}

.page-faq .index-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-0);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

@media (min-width: 1000px) {
  .page-faq .index-list {
    flex-direction: column;
    gap: 6px;
    padding: 0;
    overflow: visible;
  }
}

.page-faq .index-list li { flex: none; }
@media (min-width: 1000px) {
  .page-faq .index-list li { flex: 1 1 auto; }
}

.page-faq .index-list a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 15px;
  border-radius: 999px;
  border: 1px solid var(--glass-line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--paper);
  font-size: var(--fs-1);
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.page-faq .index-list a::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--dot, var(--lime));
  box-shadow: 0 0 10px var(--dot, var(--lime));
  flex: none;
}

.page-faq .index-list li:nth-child(1) a { --dot: var(--lime); }
.page-faq .index-list li:nth-child(2) a { --dot: var(--orange); }
.page-faq .index-list li:nth-child(3) a { --dot: var(--magenta); }
.page-faq .index-list li:nth-child(4) a { --dot: var(--violet); }
.page-faq .index-list li:nth-child(5) a { --dot: var(--gold); }

@media (min-width: 1000px) {
  .page-faq .index-list a {
    width: 100%;
    border-radius: 11px;
    white-space: normal;
  }
}

.page-faq .index-list a:hover,
.page-faq .index-list a:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(61, 245, 142, 0.42);
  color: #fff;
}

.page-faq .index-list .idx {
  font-size: var(--fs-0);
  color: var(--muted);
  letter-spacing: 0.1em;
}

.page-faq .index-top {
  justify-self: start;
  font-size: var(--fs-0);
  letter-spacing: 0.08em;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px dashed rgba(61, 245, 142, 0.5);
  padding-bottom: 2px;
}

.page-faq .index-top:hover { color: #fff; border-color: #fff; }

/* ---------- 问答分组 ---------- */
.page-faq .faq-body { min-width: 0; }

.page-faq .faq-group {
  scroll-margin-top: calc(var(--command-h) + 20px);
}

.page-faq .faq-group + .faq-group { margin-top: 48px; }

.page-faq .faq-group--lime { --accent: var(--lime); }
.page-faq .faq-group--orange { --accent: var(--orange); }
.page-faq .faq-group--magenta { --accent: var(--magenta); }
.page-faq .faq-group--violet { --accent: var(--violet); }
.page-faq .faq-group--gold { --accent: var(--gold); }

.page-faq .group-head {
  position: relative;
  padding-top: 22px;
  margin-bottom: 20px;
}

.page-faq .group-head::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(190px, 46%);
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent, var(--lime)), transparent);
}

.page-faq .group-head__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-0);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent, var(--lime));
}

.page-faq .group-head h2 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(1.35rem, 3.6vw, 2.05rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-faq .group-head__lede {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-1);
  line-height: 1.85;
  color: rgba(232, 238, 247, 0.66);
}

.page-faq .group-media {
  margin: 0 0 20px;
  border-radius: var(--radius);
  border: 1px solid var(--glass-line);
  background: var(--glass-soft);
  overflow: hidden;
}

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

/* ---------- 可展开问答 ---------- */
.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  background: var(--glass-soft);
  transition: background 0.35s ease, border-color 0.35s ease;
}

.page-faq .qa:hover { border-color: rgba(255, 255, 255, 0.26); }

.page-faq .qa[open] {
  border-color: color-mix(in srgb, var(--accent, var(--lime)) 46%, transparent);
  background: linear-gradient(180deg, rgba(14, 42, 47, 0.96), rgba(11, 27, 58, 0.98));
}

.page-faq .qa summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-2);
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .qa summary::-webkit-details-marker { display: none; }
.page-faq .qa summary::marker { content: ""; }

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -3px;
  border-radius: var(--radius);
}

.page-faq .qa__icon {
  position: relative;
  width: 24px;
  height: 24px;
  flex: none;
  border-radius: 50%;
  border: 1px solid rgba(61, 245, 142, 0.45);
  transition: transform 0.35s ease, background 0.35s ease, border-color 0.35s ease;
}

.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--lime);
  transform: translate(-50%, -50%);
  border-radius: 2px;
}

.page-faq .qa__icon::before { width: 11px; height: 2px; }
.page-faq .qa__icon::after { width: 2px; height: 11px; transition: opacity 0.3s ease; }

.page-faq .qa[open] .qa__icon {
  transform: rotate(90deg);
  background: rgba(61, 245, 142, 0.16);
  border-color: var(--lime);
}

.page-faq .qa[open] .qa__icon::after { opacity: 0; }

.page-faq .qa__body {
  margin: 0 18px;
  padding: 15px 0 19px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: var(--fs-1);
  line-height: 1.9;
  color: rgba(232, 238, 247, 0.8);
}

.page-faq .qa[open] .qa__body {
  animation: faq-reveal 0.35s ease both;
}

.page-faq .qa__body p { margin: 0 0 10px; }
.page-faq .qa__body p:last-child { margin-bottom: 0; }

@keyframes faq-reveal {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__body { animation: none; }
  .page-faq .qa,
  .page-faq .qa__icon,
  .page-faq .index-list a { transition: none; }
}

/* ---------- 收束区 ---------- */
.page-faq .faq-outro {
  max-width: var(--faq-maxw);
  margin: 0 auto;
  padding: calc(var(--faq-pad) + 12px) var(--faq-pad) calc(var(--faq-pad) + 48px);
}

.page-faq .outro-card {
  display: grid;
  gap: 28px;
  padding: 28px 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-line);
  background:
    linear-gradient(135deg, rgba(176, 52, 122, 0.22) 0%, rgba(46, 42, 114, 0.3) 100%),
    var(--ink-void);
  overflow: hidden;
}

@media (min-width: 900px) {
  .page-faq .outro-card {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 44px;
    padding: 38px 34px;
  }
}

.page-faq .outro-main h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: clamp(1.3rem, 3.4vw, 1.9rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-faq .outro-main > p {
  margin: 0 0 20px;
  max-width: 56ch;
  font-size: var(--fs-1);
  line-height: 1.85;
  color: rgba(232, 238, 247, 0.74);
}

.page-faq .outro-contacts {
  display: grid;
  gap: 10px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

@media (min-width: 640px) {
  .page-faq .outro-contacts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.page-faq .outro-contacts li {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--glass-line);
  background: rgba(255, 255, 255, 0.05);
}

.page-faq .outro-contacts .k {
  font-size: var(--fs-0);
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .outro-contacts .v {
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.03em;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .outro-side {
  display: grid;
  gap: 10px;
  align-content: start;
  padding-top: 6px;
}

.page-faq .outro-side__title {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-0);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .outro-link {
  display: block;
  padding: 13px 16px;
  border-radius: 12px;
  border: 1px solid var(--glass-line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--paper);
  font-size: var(--fs-1);
  line-height: 1.6;
  text-decoration: none;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.page-faq .outro-link:hover,
.page-faq .outro-link:focus-visible {
  background: rgba(255, 138, 61, 0.14);
  border-color: rgba(255, 138, 61, 0.55);
  transform: translateX(4px);
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 480px) {
  .page-faq .faq-hero h1 { letter-spacing: 0.02em; }
  .page-faq .hero-cta .btn { flex: 1 1 100%; justify-content: center; }
  .page-faq .qa summary { font-size: var(--fs-1); padding: 15px 14px; }
  .page-faq .qa__body { margin: 0 14px; }
  .page-faq .outro-card { padding: 22px 16px; }
}
</main>