.page-faq {
  --faq-tint: #b7c4de;
  --faq-tint-dim: #9aabca;
  background: var(--ink-900);
  color: var(--glass-100);
  overflow-x: clip;
}

.page-faq section[id],
.page-faq nav[id] {
  scroll-margin-top: 92px;
}

.page-faq .mono {
  font-family: var(--font-mono);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 3vw, 30px) 0 clamp(34px, 5vw, 58px);
  background:
    radial-gradient(110% 82% at 84% -8%, rgba(255, 91, 31, .20), transparent 58%),
    radial-gradient(92% 72% at 6% 22%, rgba(33, 212, 232, .15), transparent 60%);
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--grid-text);
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--grid-500);
}

.page-faq .breadcrumb__item a {
  color: var(--faq-tint);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .breadcrumb__item a:hover {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 20px;
  max-width: 940px;
  margin-top: clamp(30px, 5vw, 56px);
}

.page-faq .faq-hero__index {
  margin: 0;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--lime-400);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 8.2vw, 96px);
  line-height: .96;
  letter-spacing: -.02em;
  color: #fff;
}

.page-faq .faq-hero__title em {
  display: block;
  font-style: normal;
  color: var(--orange-500);
}

.page-faq .faq-hero__lede {
  max-width: 58ch;
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--faq-tint);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 锚点条 ---------- */

.page-faq .faq-anchor {
  position: sticky;
  top: 0;
  z-index: 9;
  background: rgba(7, 14, 34, .84);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-anchor__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 11px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.page-faq .faq-anchor__link {
  display: inline-block;
  white-space: nowrap;
  padding: 7px 14px;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  font-size: 13px;
  color: var(--faq-tint);
  text-decoration: none;
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-anchor__link:hover,
.page-faq .faq-anchor__link:focus-visible {
  color: var(--ink-900);
  background: var(--lime-400);
  border-color: var(--lime-400);
}

/* ---------- 三步上手 ---------- */

.page-faq .faq-steps {
  padding: clamp(46px, 7vw, 86px) 0 clamp(34px, 5vw, 60px);
}

.page-faq .faq-steps__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-faq .faq-steps__list {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
  align-items: start;
  padding: clamp(20px, 2.4vw, 28px);
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--orange-500);
  border-radius: var(--radius);
  background: linear-gradient(152deg, rgba(24, 43, 82, .94) 0%, rgba(7, 14, 34, .74) 100%);
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-faq .faq-step:hover {
  border-color: rgba(184, 255, 60, .36);
  border-left-color: var(--orange-500);
  transform: translateX(3px);
}

.page-faq .faq-step + .faq-step::before {
  content: "";
  position: absolute;
  left: calc(clamp(20px, 2.4vw, 28px) + 12px);
  top: calc(clamp(18px, 2.6vw, 28px) * -1);
  height: clamp(18px, 2.6vw, 28px);
  border-left: 2px dashed rgba(184, 255, 60, .45);
}

.page-faq .faq-step__num {
  display: block;
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lime-400);
}

.page-faq .faq-step__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.9vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  color: #fff;
}

.page-faq .faq-step__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-tint);
}

.page-faq .faq-steps__media {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-700);
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 15px;
  border-top: 1px solid var(--line-dark);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--faq-tint-dim);
}

.page-faq .faq-figure--second {
  width: 100%;
}

/* ---------- 问答区 ---------- */

.page-faq .faq-qa {
  padding: clamp(44px, 6vw, 84px) 0 clamp(52px, 7vw, 96px);
  background: var(--floor-050);
  color: var(--ink-900);
}

.page-faq .faq-qa .section__index {
  color: var(--orange-500);
  font-weight: 700;
}

.page-faq .faq-qa .section__title {
  color: var(--ink-900);
}

.page-faq .faq-qa .section__lede {
  color: #4b5a79;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(42px, 6vw, 74px);
}

.page-faq .faq-group__list {
  display: grid;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-qa .disclosure {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-sm);
  background: #fff;
  transition: border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.page-faq .faq-qa .disclosure[data-open] {
  border-color: rgba(255, 91, 31, .5);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-qa .disclosure__trigger {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 17px 20px;
  border: 0;
  background: transparent;
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  text-align: left;
  color: var(--ink-900);
  cursor: pointer;
  transition: color .2s var(--ease);
}

.page-faq .faq-qa .disclosure__trigger:hover {
  color: var(--orange-500);
}

.page-faq .faq-qa .disclosure__trigger:focus-visible {
  outline: 2px solid var(--orange-500);
  outline-offset: -3px;
}

.page-faq .faq-qa .disclosure[data-open] .disclosure__trigger::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--orange-500);
}

.page-faq .faq-qa .disclosure__icon {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .faq-qa .disclosure__icon::before,
.page-faq .faq-qa .disclosure__icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  margin-top: -1px;
  background: var(--orange-500);
  transition: transform .24s var(--ease), opacity .2s var(--ease);
}

.page-faq .faq-qa .disclosure__icon::after {
  transform: rotate(90deg);
}

.page-faq .faq-qa .disclosure[data-open] .disclosure__icon::after {
  transform: rotate(0deg);
  opacity: 0;
}

.page-faq .faq-qa .disclosure__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .24s var(--ease);
}

.page-faq .faq-qa .disclosure__panel[data-open] {
  grid-template-rows: 1fr;
}

.page-faq .faq-qa .disclosure__body {
  min-height: 0;
  overflow: hidden;
}

.page-faq .faq-qa .disclosure__body p {
  margin: 0 20px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: #4b5a79;
}

.page-faq .faq-qa .disclosure__body a {
  color: var(--ink-700);
  text-decoration: underline;
  text-decoration-color: var(--orange-300);
  text-underline-offset: 3px;
  transition: color .2s var(--ease), text-decoration-color .2s var(--ease);
}

.page-faq .faq-qa .disclosure__body a:hover {
  color: var(--orange-500);
  text-decoration-color: var(--orange-500);
}

/* ---------- 术语速查 ---------- */

.page-faq .faq-glossary {
  padding: clamp(46px, 7vw, 88px) 0;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-glossary__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line-dark);
}

.page-faq .faq-glossary__item {
  display: grid;
  grid-template-columns: minmax(76px, 26%) minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 15px 18px;
  background: var(--ink-900);
}

.page-faq .faq-glossary__term {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--lime-400);
}

.page-faq .faq-glossary__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #a7b5d3;
}

/* ---------- 联系 ---------- */

.page-faq .faq-support {
  padding: clamp(40px, 6vw, 78px) 0 clamp(56px, 8vw, 104px);
  background:
    radial-gradient(90% 66% at 82% 6%, rgba(255, 91, 31, .14), transparent 62%),
    var(--ink-900);
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-support__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 22px);
  margin-top: clamp(24px, 4vw, 38px);
}

.page-faq .faq-support__card {
  padding: clamp(20px, 2.6vw, 26px);
}

.page-faq .faq-support__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--lime-400);
}

.page-faq .faq-support__value {
  display: block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.8vw, 17px);
  font-weight: 700;
  line-height: 1.4;
  color: #fff;
  word-break: break-word;
}

.page-faq .faq-support__note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--faq-tint-dim);
}

.page-faq .faq-support__foot {
  margin: clamp(22px, 3vw, 32px) 0 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--grid-text);
}

.page-faq .faq-support__foot a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(33, 212, 232, .4);
}

.page-faq .faq-support__foot a:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 响应式 ---------- */

@media (max-width: 599px) {
  .page-faq .faq-step {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .page-faq .faq-step + .faq-step::before {
    left: 24px;
  }

  .page-faq .faq-glossary__item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .page-faq .faq-support__value {
    font-size: 15px;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-glossary__list {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-support__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

  .page-faq .faq-steps__media {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-figure--second {
    width: min(100%, 280px);
    justify-self: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-anchor__link,
  .page-faq .faq-qa .disclosure,
  .page-faq .faq-qa .disclosure__panel,
  .page-faq .faq-qa .disclosure__icon::before,
  .page-faq .faq-qa .disclosure__icon::after {
    transition: none;
  }

  .page-faq .faq-step:hover {
    transform: none;
  }
}