.page-faq {
  --faq-line: rgba(34, 211, 238, 0.22);
  --faq-line-soft: rgba(229, 242, 255, 0.10);
  --faq-panel: rgba(17, 24, 39, 0.68);
  --faq-panel-strong: rgba(17, 24, 39, 0.9);
  display: block;
  color: var(--ice);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding: clamp(18px, 4vw, 34px) 0 8px;
}

.page-faq .faq-frame {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 42px);
  border: 1px solid var(--faq-line);
  border-radius: 3px 3px var(--radius) var(--radius);
  background:
    linear-gradient(158deg, rgba(11, 27, 58, 0.88) 0%, rgba(7, 18, 38, 0.66) 58%, rgba(7, 11, 20, 0.9) 100%);
}

.page-faq .faq-frame::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--cyan) 0 20px, transparent 20px 36px);
  opacity: 0.55;
}

.page-faq .faq-frame::after {
  content: "";
  position: absolute;
  top: -170px;
  right: -130px;
  width: 440px;
  height: 440px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.2) 0%, rgba(34, 211, 238, 0) 68%);
  pointer-events: none;
}

.page-faq .faq-frame__rail {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: clamp(20px, 3vw, 30px);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-frame__rule {
  flex: 1 1 auto;
  height: 1px;
  background: var(--faq-line);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

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

.page-faq .faq-hero h1 {
  margin: 12px 0 16px;
  font-family: var(--display);
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--ice);
  max-width: 18ch;
}

.page-faq .faq-hero .lead {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.7;
  color: var(--slate);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-faq .faq-hero__stats .stat__value {
  font-family: var(--mono);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ice);
}

.page-faq .faq-hero__stats .stat__value--cyan {
  color: var(--cyan);
}

.page-faq .faq-hero__stats .stat__value--orange {
  color: var(--orange);
}

.page-faq .faq-hero__stats .stat__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-faq .faq-hero__media {
  margin: 0;
  min-width: 0;
}

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

/* ---------- 主体：左索引 + 右问答 ---------- */
.page-faq .faq-body {
  padding: clamp(30px, 6vw, 64px) 0 clamp(34px, 6vw, 68px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.page-faq .faq-index {
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius);
  background: var(--faq-panel);
  padding: 18px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  border-radius: 8px;
  font-size: 15px;
  color: var(--ice);
  text-decoration: none;
  transition: background 180ms var(--ease), border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: rgba(34, 211, 238, 0.09);
  border-left-color: var(--orange);
}

.page-faq .faq-index__num {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cyan);
  opacity: 0.85;
}

.page-faq .faq-index__mail {
  display: grid;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-index__label {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-faq .faq-index__code {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--cyan);
  word-break: break-all;
}

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

/* ---------- 主题分段切换 ---------- */
.page-faq .faq-tabs {
  min-width: 0;
}

.page-faq .faq-tabs__list {
  display: flex;
  gap: 8px;
  margin: 0 0 24px;
  padding: 4px 0 14px;
  overflow-x: auto;
  border-bottom: 1px solid var(--faq-line-soft);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-tabs__list .tab {
  flex: 0 0 auto;
  appearance: none;
  padding: 9px 16px;
  border: 1px solid var(--faq-line-soft);
  border-radius: 999px;
  background: rgba(229, 242, 255, 0.04);
  color: var(--slate);
  font-family: var(--body);
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .faq-tabs__list .tab:hover,
.page-faq .faq-tabs__list .tab:focus-visible {
  color: var(--ice);
  border-color: var(--faq-line);
}

.page-faq .faq-tabs__list .tab[aria-selected="true"],
.page-faq .faq-tabs__list .tab.is-active {
  color: var(--ice);
  border-color: var(--orange);
  background: rgba(255, 107, 44, 0.15);
}

.page-faq .tabs__panel {
  scroll-margin-top: 110px;
}

/* ---------- 主题块与手风琴 ---------- */
.page-faq .faq-topic__title {
  margin: 0 0 6px;
  font-family: var(--display);
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--ice);
}

.page-faq .faq-topic__note {
  margin: 0 0 20px;
  font-size: 13.5px;
  line-height: 1.6;
}

.page-faq .faq-item {
  margin-bottom: 12px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius);
  background: var(--faq-panel);
  overflow: hidden;
  transition: border-color 200ms var(--ease), background 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-line);
  background: var(--faq-panel-strong);
  box-shadow: 0 22px 48px -34px rgba(34, 211, 238, 0.85);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ice);
  transition: color 180ms var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--cyan);
}

.page-faq .faq-item__q::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--mono);
  font-size: 19px;
  line-height: 1.2;
  color: var(--cyan);
  transition: transform 200ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2013";
  color: var(--orange);
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  min-width: 2em;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--orange);
  opacity: 0.9;
}

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

.page-faq .faq-item__a {
  padding: 0 18px 18px 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-item__a p {
  margin: 0 0 9px;
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.page-faq .faq-path {
  list-style: none;
  margin: 10px 0 9px;
  padding: 0;
  display: grid;
  gap: 9px;
  counter-reset: faqstep;
}

.page-faq .faq-path li {
  position: relative;
  padding-left: 30px;
  counter-increment: faqstep;
}

.page-faq .faq-path li::before {
  content: counter(faqstep);
  position: absolute;
  left: 0;
  top: 2px;
  width: 19px;
  height: 19px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 10.5px;
  line-height: 17px;
  text-align: center;
  color: var(--cyan);
}

.page-faq .faq-figure {
  margin: 18px 0 22px;
}

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

/* ---------- 底部人工支持 ---------- */
.page-faq .faq-contact {
  padding: 0 0 clamp(38px, 6vw, 72px);
}

.page-faq .faq-contact__box {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding: clamp(22px, 4vw, 38px);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background:
    linear-gradient(120deg, rgba(11, 27, 58, 0.9) 0%, rgba(7, 18, 38, 0.72) 100%);
}

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

.page-faq .faq-contact__copy h2 {
  margin: 10px 0 12px;
  font-family: var(--display);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.2;
  color: var(--ice);
}

.page-faq .faq-contact__copy p {
  margin: 0 0 18px;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border: 1px solid var(--faq-line-soft);
  border-radius: 10px;
  background: var(--faq-line-soft);
  overflow: hidden;
  align-self: start;
}

.page-faq .faq-contact__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
  padding: 14px 16px;
  background: rgba(7, 11, 20, 0.72);
}

.page-faq .faq-contact__k {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-faq .faq-contact__v {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ice);
  word-break: break-all;
}

/* ---------- 响应式 ---------- */
@media (max-width: 599px) {
  .page-faq .faq-frame {
    padding: 20px 16px 24px;
  }

  .page-faq .faq-item__q {
    gap: 10px;
    padding: 14px 14px;
    font-size: 15px;
  }

  .page-faq .faq-item__a {
    padding: 0 14px 16px 14px;
  }

  .page-faq .faq-item__num {
    min-width: 1.7em;
    font-size: 13px;
  }

  .page-faq .faq-hero__stats {
    gap: 12px 22px;
  }

  .page-faq .faq-contact__list li {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 768px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-contact__box {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 244px minmax(0, 1fr);
    gap: 46px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
  }

  .page-faq .faq-index__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-item__q {
    padding: 18px 22px;
    font-size: 16.5px;
  }

  .page-faq .faq-item__a {
    padding: 0 22px 20px 22px;
  }

  .page-faq .faq-hero__media {
    align-self: stretch;
  }

  .page-faq .faq-hero__media img {
    height: 100%;
    min-height: 260px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .faq-index__link,
  .page-faq .faq-tabs__list .tab {
    transition: none;
  }
}