.page-faq {
  padding-bottom: 104px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 44px 0 60px;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -140px;
  right: -90px;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(53, 242, 160, .14), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 34px;
  margin-top: 26px;
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(32px, 5.6vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 17em;
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 57ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-hero__lede + .faq-hero__lede {
  margin-top: 12px;
}

.page-faq .faq-hero__lede a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 200, 255, .38);
}

.page-faq .faq-hero__lede a:hover {
  color: var(--neon);
  border-bottom-color: rgba(53, 242, 160, .5);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px 14px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 21px;
  letter-spacing: .04em;
  color: var(--gold);
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 40px;
  padding-top: 54px;
}

.page-faq .faq-index {
  position: relative;
  padding-left: 22px;
}

.page-faq .faq-index::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: repeating-linear-gradient(180deg, rgba(142, 155, 189, .5) 0 2px, transparent 2px 9px);
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.5;
  text-decoration: none;
  transition: color .22s ease, border-color .22s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--line-strong);
}

.page-faq .faq-index__link[aria-current] {
  color: var(--neon);
  border-bottom-color: rgba(53, 242, 160, .45);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--gold);
}

/* ---------- 章节 ---------- */
.page-faq .faq-block {
  padding-bottom: 52px;
  margin-bottom: 52px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.page-faq .faq-block:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-block__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(25px, 3.4vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 22em;
}

.page-faq .faq-block__text {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 步骤 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-step:last-child {
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-step__num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-faq .faq-step__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.74;
  color: var(--muted);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 34px 0 0;
}

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

/* ---------- 提示条 ---------- */
.page-faq .faq-note {
  margin-top: 28px;
  padding: 20px 22px;
  border-left: 2px solid var(--neon);
  background: linear-gradient(90deg, rgba(53, 242, 160, .09), rgba(53, 242, 160, 0) 78%);
}

.page-faq .faq-note p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--paper);
  max-width: 64ch;
}

/* ---------- 版本对照卡 ---------- */
.page-faq .version-grid {
  display: grid;
  gap: 20px;
  margin-top: 30px;
}

.page-faq .version-card {
  position: relative;
  padding: 26px 22px 22px;
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(11, 26, 60, .92), rgba(5, 11, 30, .92));
  transition: box-shadow .28s ease, border-color .28s ease, transform .28s ease;
}

.page-faq .version-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 68px;
  height: 2px;
  background: var(--neon);
}

.page-faq .version-card--b::before {
  background: var(--cyan);
}

.page-faq .version-card--a:hover {
  border-color: rgba(53, 242, 160, .38);
  box-shadow: 0 20px 54px -32px rgba(53, 242, 160, .8);
  transform: translateY(-4px);
}

.page-faq .version-card--b:hover {
  border-color: rgba(41, 200, 255, .38);
  box-shadow: 0 20px 54px -32px rgba(41, 200, 255, .8);
  transform: translateY(-4px);
}

.page-faq .version-card--b .tag {
  border-color: rgba(41, 200, 255, .45);
  color: var(--cyan);
}

.page-faq .version-card__title {
  margin: 14px 0 0;
  font-size: 19px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .version-card__rows {
  margin: 18px 0 0;
}

.page-faq .version-card__row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 14px;
  padding: 11px 0;
  border-top: 1px dashed var(--line);
}

.page-faq .version-card__row dt {
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .05em;
  color: var(--muted);
}

.page-faq .version-card__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--paper);
}

/* ---------- 记录卡片 ---------- */
.page-faq .record-grid {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-faq .record-card {
  padding: 22px 20px;
  border: 1px solid var(--line);
  background: rgba(11, 26, 60, .55);
}

.page-faq .record-card__value {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: .05em;
  color: var(--neon);
}

.page-faq .record-card:nth-child(2) .record-card__value {
  color: var(--cyan);
}

.page-faq .record-card:nth-child(3) .record-card__value {
  color: var(--gold);
}

.page-faq .record-card__desc {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--muted);
}

/* ---------- 问答折叠 ---------- */
.page-faq .faq-qa-list {
  margin-top: 30px;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-qa__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 2px;
  list-style: none;
  cursor: pointer;
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--paper);
}

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

.page-faq .faq-qa__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--neon);
}

.page-faq .faq-qa[open] .faq-qa__q::after {
  content: "−";
  color: var(--magenta);
}

.page-faq .faq-qa__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-faq .faq-qa__a {
  padding: 0 2px 22px;
}

.page-faq .faq-qa__a p {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 咨询 ---------- */
.page-faq .ask-grid {
  display: grid;
  gap: 18px;
  margin-top: 30px;
}

.page-faq .ask-card {
  padding: 24px 22px;
  border: 1px solid var(--line);
  background: rgba(11, 26, 60, .5);
}

.page-faq .ask-card__value {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 19px;
  letter-spacing: .03em;
  color: var(--gold);
  overflow-wrap: anywhere;
}

.page-faq .ask-card__value--mail {
  font-size: 16px;
  color: var(--cyan);
}

.page-faq .ask-card__desc {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--muted);
}

.page-faq .ask-prep {
  margin-top: 28px;
  padding: 24px 22px;
  border: 1px dashed var(--line-strong);
}

.page-faq .ask-prep__title {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--paper);
}

.page-faq .ask-prep__list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .ask-prep__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .ask-prep__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 10px;
  height: 1px;
  background: var(--neon);
}

.page-faq .faq-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .record-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .ask-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .version-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 56px 0 72px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: end;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 72px;
    align-items: start;
  }

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

@media (max-width: 620px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-step {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 12px;
  }

  .page-faq .version-card__row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .page-faq .faq-qa__q {
    gap: 10px;
    font-size: 15.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .version-card,
  .page-faq .faq-index__link {
    transition: none;
  }

  .page-faq .version-card:hover {
    transform: none;
  }
}