.page-faq {
  position: relative;
  isolation: isolate;
  padding-bottom: clamp(56px, 8vw, 104px);
  background:
    radial-gradient(900px 460px at 8% -6%, rgba(42, 27, 77, 0.9), transparent 68%),
    radial-gradient(700px 380px at 96% 2%, rgba(43, 227, 209, 0.07), transparent 70%),
    var(--deep);
  color: var(--text-body);
  font-family: var(--font-body);
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 顶部 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + 28px) 0 clamp(36px, 5vw, 62px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--orbit), transparent);
  opacity: 0.55;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-faq .faq-hero__copy {
  min-width: 0;
  max-width: 640px;
}

.page-faq .faq-hero__kicker {
  margin: 22px 0 12px;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(29px, 4.4vw, 50px);
  line-height: 1.07;
  letter-spacing: -0.02em;
  color: var(--star);
  text-shadow: 0 0 24px rgba(43, 227, 209, 0.18);
}

.page-faq .faq-hero__lead {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-body);
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 9px 17px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--star);
  font-size: 14px;
  line-height: 1.3;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-chip .num {
  font-size: 12px;
  color: var(--orange);
}

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

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

.page-faq .faq-hero__art {
  margin: 0;
  border-radius: var(--r-glass);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  box-shadow: 0 34px 80px -46px rgba(43, 227, 209, 0.5);
}

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

/* ---------- 主体双栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 46px);
  padding-top: clamp(40px, 6vw, 72px);
}

/* ---------- 左侧目录 ---------- */

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

.page-faq .faq-toc__label {
  margin: 0 0 14px;
  color: var(--mist);
}

.page-faq .faq-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc__link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: var(--r-pill);
  color: var(--text-body);
  font-size: 14.5px;
  line-height: 1.3;
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-toc__link .num {
  font-size: 12px;
  color: var(--mist);
}

.page-faq .faq-toc__link:hover {
  color: var(--star);
  background: rgba(255, 255, 255, 0.05);
}

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

.page-faq .faq-toc__link[data-active="true"] {
  color: var(--star);
  background: rgba(43, 227, 209, 0.08);
}

.page-faq .faq-toc__link[data-active="true"] .num {
  color: var(--cyan);
}

.page-faq .faq-toc__tip {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 问答流 ---------- */

.page-faq .faq-flow {
  display: grid;
  gap: clamp(38px, 5vw, 62px);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: center;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group__num {
  grid-column: 1;
  font-size: 24px;
  line-height: 1;
  color: var(--orbit);
}

.page-faq .faq-group__title {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 2.4vw, 27px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--star);
}

.page-faq .faq-group__sub {
  grid-column: 1 / -1;
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

/* ---------- 折叠条目 ---------- */

.page-faq .faq-item {
  border-radius: var(--r-glass);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  min-height: 58px;
  padding: 17px 20px;
  cursor: pointer;
  list-style: none;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-glass);
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--star);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.55;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.35;
  color: var(--cyan);
  transition: color 0.2s ease;
}

.page-faq .faq-item > summary:hover {
  border-color: var(--line);
}

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

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

.page-faq .faq-item[open] > summary {
  border-color: rgba(43, 227, 209, 0.34);
  border-bottom-color: transparent;
  border-radius: var(--r-glass) var(--r-glass) 0 0;
  background: rgba(43, 227, 209, 0.07);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
  color: var(--orange);
}

.page-faq .faq-item__a {
  padding: 18px 20px 22px;
  border: 1px solid rgba(43, 227, 209, 0.34);
  border-top: none;
  border-radius: 0 0 var(--r-card) var(--r-card);
  background: var(--stand);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-body);
}

.page-faq .faq-item__a > * + * {
  margin-top: 14px;
}

/* ---------- 步骤序号 ---------- */

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

.page-faq .faq-steps li {
  position: relative;
  padding-left: 38px;
  counter-increment: faqstep;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

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

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

/* ---------- 组内插图 ---------- */

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

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-card);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 组尾提示条 ---------- */

.page-faq .faq-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 18px;
  padding: 15px 18px;
  border: 1px dashed var(--line);
  border-radius: var(--r-card);
  background: rgba(42, 27, 77, 0.38);
}

.page-faq .faq-foot__text {
  margin: 0;
  flex: 1 1 260px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 断点 ---------- */

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 244px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-faq .faq-toc__list {
    display: grid;
    gap: 4px;
  }

  .page-faq .faq-toc__link {
    padding-left: 22px;
    border-radius: 10px;
  }

  .page-faq .faq-toc__link::before {
    content: "";
    position: absolute;
    left: 7px;
    top: 50%;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--orbit);
    transform: translateY(-50%);
    transition: width 0.2s ease, height 0.2s ease, background-color 0.2s ease;
  }

  .page-faq .faq-toc__link[data-active="true"]::before {
    width: 13px;
    height: 2px;
    border-radius: 2px;
    background: var(--cyan);
    box-shadow: 0 0 10px rgba(43, 227, 209, 0.8);
  }
}

@media (max-width: 560px) {
  .page-faq .faq-item > summary {
    padding: 15px 16px;
    font-size: 15.5px;
  }

  .page-faq .faq-item__a {
    padding: 16px 16px 20px;
    font-size: 15px;
  }

  .page-faq .faq-hero__title {
    font-size: 27px;
  }

  .page-faq .faq-group__num {
    font-size: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .faq-toc__link,
  .page-faq .faq-toc__link::before,
  .page-faq .faq-item > summary {
    transition: none;
  }

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