.page-faq {
  --faq-line: rgba(242, 245, 247, 0.12);
  --faq-glow: rgba(47, 122, 91, 0.32);
  --faq-a-line: rgba(47, 122, 91, 0.6);
  --zone: var(--flag-green);
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 5vw, 54px) 0 clamp(30px, 5vw, 62px);
  border-bottom: 1px solid var(--faq-line);
  background:
    radial-gradient(72% 82% at 92% 2%, var(--faq-glow), transparent 64%),
    radial-gradient(62% 70% at 2% 100%, rgba(36, 26, 70, 0.88), transparent 72%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--flag-green) 30%, var(--cyan) 72%, transparent);
  opacity: 0.55;
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
  align-items: center;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(30px, 6.6vw, 60px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__copy .lede {
  margin-top: 16px;
  max-width: 620px;
}

.page-faq .faq-hero__copy .btn-row {
  margin-top: 24px;
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--faq-line);
  box-shadow: var(--shadow-soft);
  background: linear-gradient(150deg, rgba(47, 122, 91, 0.32), rgba(36, 26, 70, 0.7));
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 分类索引带 ---------- */
.page-faq .faq-band {
  border-bottom: 1px solid var(--faq-line);
  background: linear-gradient(180deg, rgba(47, 122, 91, 0.16), rgba(7, 10, 20, 0));
}

.page-faq .faq-band__track {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 14px 0;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-band__track::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-band__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  color: var(--paper);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.24s var(--ease), color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-faq .faq-band__item .mono {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--flag-yellow);
}

.page-faq .faq-band__item:hover,
.page-faq .faq-band__item:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

/* ---------- 索引 + 问答主体 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  padding-top: clamp(34px, 6vw, 68px);
  padding-bottom: clamp(42px, 7vw, 86px);
}

.page-faq .faq-rail {
  display: none;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

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

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0 9px 14px;
  border-left: 1px solid var(--faq-line);
  color: var(--mist);
  font-size: 13.5px;
  text-decoration: none;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-faq .faq-rail__list .mono {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--flag-yellow);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: rgba(53, 224, 214, 0.06);
}

/* ---------- 分区 ---------- */
.page-faq .faq-sec {
  scroll-margin-top: calc(var(--header-h) + 22px);
}

.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(46px, 7vw, 82px);
}

.page-faq .faq-sec__head {
  position: relative;
  display: grid;
  gap: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-sec__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 72px;
  height: 2px;
  background: linear-gradient(90deg, var(--flag-green), var(--cyan));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.55s var(--ease);
}

.page-faq .faq-sec.is-active .faq-sec__head::after {
  transform: scaleX(1);
}

.page-faq .faq-sec__num {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--flag-yellow);
}

.page-faq .faq-sec__title {
  margin: 0;
  font-size: clamp(23px, 3.4vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-sec__note {
  margin: 0;
  max-width: 620px;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.7;
}

.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 28px) 0 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--faq-line);
  background: linear-gradient(160deg, rgba(47, 122, 91, 0.28), rgba(36, 26, 70, 0.7));
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  margin: 0;
}

.page-faq .qa {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: clamp(15.5px, 2vw, 17.5px);
  font-weight: 700;
  line-height: 1.55;
  transition: color 0.24s var(--ease);
}

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

.page-faq .qa__q::marker {
  content: "";
}

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

.page-faq .qa__idx {
  flex: 0 0 auto;
  padding-top: 4px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .qa__sign {
  flex: 0 0 auto;
  position: relative;
  width: 18px;
  height: 18px;
  margin-left: auto;
  margin-top: 4px;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.page-faq .qa__sign::before {
  width: 12px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .qa__sign::after {
  width: 1.5px;
  height: 12px;
  transform: translate(-50%, -50%);
}

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

.page-faq .qa__a {
  margin: 0 0 20px;
  padding-left: 16px;
  border-left: 1px solid var(--faq-a-line);
  max-width: 660px;
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

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

.page-faq .qa__a .qa__more {
  font-size: 14px;
}

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 214, 0.4);
  transition: border-color 0.24s var(--ease);
}

.page-faq .qa__a a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .qa[open] > .qa__a {
  animation: faq-rise 0.3s var(--ease) both;
}

@keyframes faq-rise {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 收束区块 ---------- */
.page-faq .faq-help {
  position: relative;
  margin-bottom: clamp(46px, 8vw, 88px);
  padding: clamp(26px, 5vw, 52px);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(84% 130% at 100% 0%, rgba(47, 122, 91, 0.36), transparent 64%),
    linear-gradient(160deg, rgba(36, 26, 70, 0.85), rgba(12, 16, 32, 0.94));
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.page-faq .faq-help__title {
  margin: 0;
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-help__text {
  margin: 14px 0 0;
  max-width: 640px;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-faq .faq-help .btn-row {
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .qa__a {
    padding-left: 30px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-sec__head {
    grid-template-columns: 1fr;
    max-width: 820px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] > .qa__a {
    animation: none;
  }

  .page-faq .faq-band__item {
    transition: border-color 0.24s var(--ease), color 0.24s var(--ease);
  }

  .page-faq .faq-band__item:hover,
  .page-faq .faq-band__item:focus-visible {
    transform: none;
  }

  .page-faq .faq-sec__head::after {
    transition: none;
    transform: scaleX(1);
  }
}