.page-faq {
  --faq-rail: 244px;
  --faq-item-gap: 10px;
  color: var(--ink);
  background: transparent;
}

/* ---------- 页首 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 clamp(38px, 6vw, 76px);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -20% -20% auto -20%;
  height: 150%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 76% at 84% 8%, rgba(15, 123, 108, .48), transparent 64%),
    repeating-linear-gradient(118deg, rgba(61, 245, 212, .055) 0 1px, transparent 1px 74px);
}

.page-faq .faq-hero > .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  margin-top: clamp(16px, 2.6vw, 30px);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-size: clamp(27px, 4.3vw, 52px);
  font-weight: 900;
  line-height: 1.13;
  letter-spacing: -.022em;
  color: var(--paper);
  max-width: 19em;
}

.page-faq .faq-hero__intro {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  line-height: 1.86;
  color: var(--ink-soft);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(14px, 2.4vw, 30px);
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-fact {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-left: 13px;
  border-left: 2px solid var(--line-amber);
}

.page-faq .faq-fact__n {
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.1vw, 27px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--amber);
}

.page-faq .faq-fact__l {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ink-dim);
}

.page-faq .faq-hero__figure {
  margin: 0;
  aspect-ratio: 16 / 10;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  overflow: hidden;
}

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

/* ---------- 控制台两栏 ---------- */

.page-faq .faq-console {
  padding: clamp(36px, 5vw, 72px) 0 clamp(28px, 3.6vw, 48px);
}

.page-faq .faq-console__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

/* ---------- 左侧索引面板 ---------- */

.page-faq .faq-index {
  padding: 18px 16px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background:
    linear-gradient(180deg, rgba(15, 123, 108, .24), rgba(14, 34, 51, 0) 48%),
    var(--deep);
  overflow: hidden;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: 13.5px;
  line-height: 1.45;
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink-soft);
  transition: color .22s var(--ease), background-color .22s var(--ease), border-color .22s var(--ease), transform .22s var(--ease);
}

.page-faq .faq-index__link:hover {
  color: var(--paper);
  background: rgba(61, 245, 212, .09);
  border-color: rgba(61, 245, 212, .38);
  transform: translateY(-1px);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  color: var(--paper);
}

.page-faq .faq-index__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-faq .faq-index__status {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 14px 0 0;
  padding-top: 13px;
  border-top: 1px dashed var(--line-soft);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-dim);
}

.page-faq .faq-index__pulse {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  animation: faq-pulse 2.6s var(--ease) infinite;
}

@keyframes faq-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(61, 245, 212, .58); }
  50% { box-shadow: 0 0 0 7px rgba(61, 245, 212, 0); }
}

/* ---------- 问题分组 ---------- */

.page-faq .faq-answers {
  min-width: 0;
  max-width: 940px;
}

.page-faq .faq-group {
  scroll-margin-top: 126px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 5.5vw, 76px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--teal);
  text-shadow: 0 0 22px rgba(15, 123, 108, .9);
}

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

.page-faq .faq-group__heading h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.3vw, 26px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-faq .faq-group__heading p {
  margin: 7px 0 0;
  max-width: 44em;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--ink-dim);
}

.page-faq .faq-figure {
  margin: 0 0 16px;
  aspect-ratio: 3 / 2;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

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

/* ---------- 问答条目 ---------- */

.page-faq .faq-item {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--deep);
  overflow: hidden;
  transition: border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: var(--faq-item-gap);
}

.page-faq .faq-item:hover {
  border-color: rgba(61, 245, 212, .34);
}

.page-faq .faq-item[open] {
  border-color: rgba(61, 245, 212, .48);
  box-shadow: var(--shadow-lift);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: clamp(14.5px, 1.55vw, 16.5px);
  font-weight: 700;
  line-height: 1.52;
  color: var(--ink);
  transition: color .22s var(--ease), background-color .22s var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--paper);
  background: rgba(61, 245, 212, .06);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 500;
  line-height: 1;
  color: var(--amber);
}

.page-faq .faq-item[open] > .faq-item__q::after {
  content: "−";
  color: var(--cyan);
}

.page-faq .faq-item__a {
  padding: 17px 20px 19px;
  background: var(--paper);
  color: var(--on-paper);
  border-top: 1px solid rgba(15, 123, 108, .35);
  font-size: 14.5px;
  line-height: 1.86;
}

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

.page-faq .faq-item__a p + p {
  margin-top: 10px;
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .96em;
  letter-spacing: -.01em;
  color: var(--moss);
}

.page-faq .faq-item__a a {
  color: var(--teal);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color .2s var(--ease);
}

.page-faq .faq-item__a a:hover {
  color: var(--moss);
}

.page-faq .faq-item__a a:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

/* ---------- 联系支持 ---------- */

.page-faq .faq-callout {
  padding: 0 0 clamp(46px, 6vw, 84px);
}

.page-faq .faq-callout__panel {
  display: grid;
  gap: clamp(22px, 3.4vw, 38px);
  padding: clamp(24px, 4vw, 46px);
  border: 1px solid rgba(61, 245, 212, .26);
  border-radius: var(--r-lg);
  color: var(--ink);
  overflow: hidden;
  background:
    radial-gradient(120% 150% at 96% 0%, rgba(61, 245, 212, .22), transparent 58%),
    linear-gradient(140deg, rgba(15, 123, 108, .94), rgba(31, 95, 75, .94) 56%, rgba(14, 34, 51, .96));
}

.page-faq .faq-callout__head h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(21px, 2.8vw, 32px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -.02em;
  color: #ffffff;
}

.page-faq .faq-callout__head p {
  margin: 13px 0 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(233, 242, 240, .87);
}

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

.page-faq .faq-callout__list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-callout__item {
  display: grid;
  gap: 5px;
  padding: 14px 16px;
  border: 1px solid rgba(233, 242, 240, .2);
  border-radius: var(--r-md);
  background: rgba(7, 26, 43, .46);
}

.page-faq .faq-callout__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-faq .faq-callout__value {
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.7vw, 18px);
  font-weight: 700;
  line-height: 1.4;
  color: #ffffff;
  overflow-wrap: anywhere;
}

.page-faq .faq-callout__note {
  font-size: 12.5px;
  line-height: 1.68;
  color: rgba(233, 242, 240, .74);
}

.page-faq .faq-callout__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-index__list {
    flex-wrap: wrap;
    overflow-x: visible;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: center;
  }

  .page-faq .faq-hero__figure {
    aspect-ratio: 4 / 3;
  }

  .page-faq .faq-callout__panel {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-console__layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(34px, 5vw, 70px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 110px;
  }

  .page-faq .faq-index__list {
    display: grid;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-index__link {
    padding: 11px 12px;
    border-radius: 0 var(--r-sm) var(--r-sm) 0;
    border-color: transparent;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover {
    transform: translateX(2px);
    border-color: transparent;
    border-left-color: var(--cyan);
  }
}

@media (max-width: 480px) {
  .page-faq .faq-item__q {
    padding: 14px 15px;
    gap: 9px;
  }

  .page-faq .faq-item__a {
    padding: 15px 16px 17px;
    font-size: 14px;
  }

  .page-faq .faq-group__head {
    gap: 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__pulse {
    animation: none;
  }

  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
  }
}