.page-faq {
  --faq-rule: rgba(36, 28, 24, 0.16);
  --faq-rule-dark: rgba(143, 166, 196, 0.32);
  --faq-muted: rgba(36, 28, 24, 0.66);
  --faq-muted-dark: rgba(242, 245, 250, 0.70);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -22%;
  right: -10%;
  width: 48%;
  height: 144%;
  background: linear-gradient(118deg, rgba(53, 242, 214, 0.17), rgba(255, 122, 41, 0.11) 56%, transparent 80%);
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero .crumbs,
.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  margin-top: 24px;
  align-items: center;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-size: var(--fs-7);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 18ch;
}

.page-faq .faq-hero .lede {
  margin-top: 16px;
  max-width: 38ch;
}

.page-faq .faq-hero__tags {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-hero__shot {
  margin: 30px 0 0;
}

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

/* ============ 分组索引栏 ============ */
.page-faq .faq-nav__inner {
  border-top: 3px solid var(--ink);
  padding-top: 14px;
  margin-bottom: 32px;
}

.page-faq .faq-nav__title {
  margin: 0 0 12px;
  font-size: var(--fs-1);
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--faq-muted);
}

.page-faq .faq-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 13px;
  border: 1px solid var(--faq-rule);
  border-radius: 999px;
  font-size: var(--fs-2);
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  transition: transform 160ms var(--ease), border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .faq-nav__link:hover {
  transform: translateY(-2px);
  border-color: var(--orange);
  color: var(--indigo);
}

.page-faq .faq-nav__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-nav__num {
  font-size: var(--fs-1);
  font-weight: 900;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

/* ============ 分组 ============ */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-tight) + 26px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 54px;
}

.page-faq .faq-group__band {
  display: block;
  margin: 0 0 16px;
}

.page-faq .faq-group .chapter {
  margin-bottom: 6px;
}

.page-faq .faq-group__figure {
  margin: 8px 0 22px;
}

/* ============ 折叠问答 ============ */
.page-faq .faq-acc-list {
  margin-top: 12px;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-acc-list .acc {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-acc-list .acc__head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
}

.page-faq .acc__toggle {
  display: block;
  width: 100%;
  margin: 0;
  padding: 16px 42px 16px 0;
  border: 0;
  background: transparent;
  font-family: var(--font);
  font-size: var(--fs-3);
  font-weight: 700;
  line-height: 1.5;
  text-align: left;
  color: var(--ink);
  position: relative;
  cursor: pointer;
  transition: color 160ms var(--ease);
}

.page-faq .acc__toggle:hover {
  color: var(--indigo);
}

.page-faq .acc__toggle:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .acc__toggle::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  font-weight: 900;
  line-height: 1;
  color: var(--orange);
}

.page-faq .acc[data-open="true"] .acc__toggle::after {
  content: "−";
}

.page-faq .acc__body {
  padding: 0 42px 18px 0;
}

.page-faq .acc__body p {
  margin: 0;
  max-width: 44ch;
  font-size: var(--fs-3);
  line-height: 1.8;
  color: var(--faq-muted);
}

.page-faq .acc__body a {
  color: var(--indigo);
  font-weight: 700;
  text-decoration: none;
  box-shadow: inset 0 -0.4em 0 rgba(53, 242, 214, 0.42);
}

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

.page-faq .acc__body a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ============ 收束区 ============ */
.page-faq .faq-next__title {
  margin: 20px 0 0;
  max-width: 22ch;
}

.page-faq .faq-next__lead {
  margin: 14px 0 0;
  max-width: 40ch;
  color: var(--faq-muted-dark);
  line-height: 1.75;
}

.page-faq .faq-next__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--faq-rule-dark);
}

.page-faq .faq-next__link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--faq-rule-dark);
  color: var(--frost);
  text-decoration: none;
  font-size: var(--fs-3);
  font-weight: 600;
  line-height: 1.6;
  transition: transform 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .faq-next__link:hover {
  transform: translateY(-2px);
  color: var(--cyan);
}

.page-faq .faq-next__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-next__num {
  flex: none;
  font-size: var(--fs-1);
  font-weight: 900;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

/* ============ 桌面端 ============ */
@media (min-width: 900px) {
  .page-faq .faq-hero__shot {
    margin: 0;
  }

  .page-faq .faq-nav__inner {
    position: sticky;
    top: calc(var(--bar-tight) + 26px);
    margin-bottom: 0;
  }

  .page-faq .faq-nav__list {
    display: grid;
    gap: 0;
    border-left: 2px solid var(--faq-rule);
  }

  .page-faq .faq-nav__link {
    display: flex;
    margin-left: -2px;
    padding: 10px 12px;
    border: 0;
    border-left: 3px solid transparent;
    border-radius: 0;
    white-space: normal;
  }

  .page-faq .faq-nav__link:hover {
    transform: none;
    border-left-color: var(--orange);
  }

  .page-faq .faq-nav__link:focus-visible {
    outline-offset: 0;
    border-left-color: var(--cyan);
  }

  .page-faq .acc__toggle {
    font-size: var(--fs-4);
  }

  .page-faq .acc__body p {
    font-size: var(--fs-3);
  }

  .page-faq .faq-next__list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 48px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero h1 {
    font-size: var(--fs-8);
  }
}