.page-faq {
  --faq-tint: rgba(242, 239, 230, 0.78);
  --faq-faint: rgba(242, 239, 230, 0.56);
  background: var(--ink);
  color: var(--paper);
  padding-bottom: clamp(40px, 7vw, 80px);
}

.page-faq .breadcrumb {
  padding-top: clamp(20px, 4vw, 32px);
  color: var(--faq-faint);
}

.page-faq .breadcrumb__link {
  color: var(--stone);
  text-decoration: none;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding: clamp(28px, 5vw, 56px) 0 clamp(28px, 5vw, 52px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__index {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  font-weight: 800;
  max-width: 18ch;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 40ch;
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.8;
  color: var(--faq-tint);
}

.page-faq .faq-hero__aside {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-faq .faq-hero__metric {
  flex: 1 1 140px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: var(--ink-2);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 42px);
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-hero__unit {
  font-size: 13px;
  line-height: 1.5;
  color: var(--faq-faint);
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
  .page-faq .faq-hero__aside {
    flex-direction: column;
    flex-wrap: nowrap;
  }
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-top: clamp(28px, 5vw, 52px);
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-side__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-faq .faq-toc {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  padding-bottom: 4px;
}

.page-faq .faq-toc li {
  flex: 0 0 auto;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  color: var(--faq-tint);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.4;
  white-space: nowrap;
  transition: border-color 0.16s ease, color 0.16s ease, background-color 0.16s ease;
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(44, 229, 208, 0.06);
}

.page-faq .faq-toc__no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--stone);
}

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

@media (min-width: 1024px) {
  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
  .page-faq .faq-toc {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    border-top: 1px solid var(--line);
  }
  .page-faq .faq-toc li {
    flex: none;
  }
  .page-faq .faq-toc__link {
    border: 0;
    border-bottom: 1px solid var(--line);
    border-left: 2px solid transparent;
    padding: 12px 12px 12px 14px;
    white-space: normal;
    background: transparent;
  }
  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(44, 229, 208, 0.05);
  }
}

/* ---------- 分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  padding-top: clamp(8px, 2vw, 16px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(36px, 6vw, 72px);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-group__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.08em;
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.2vw, 32px);
  line-height: 1.25;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-group__lead {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(14px, 1.6vw, 15.5px);
  line-height: 1.75;
  color: var(--faq-faint);
}

@media (min-width: 760px) {
  .page-faq .faq-group__head {
    grid-template-columns: 64px minmax(0, 1fr);
    column-gap: 22px;
    row-gap: 8px;
    align-items: start;
  }
  .page-faq .faq-group__num {
    grid-row: 1 / span 2;
    padding-top: 4px;
  }
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

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

.page-faq .faq-figure--tall img,
.page-faq .faq-figure--tall .media-frame__img {
  max-height: 420px;
  object-position: center top;
}

@media (min-width: 760px) {
  .page-faq .faq-figure--tall {
    max-width: 340px;
  }
}

.page-faq .faq-figure .media-frame__cap,
.page-faq .faq-figure figcaption {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--stone);
  border-top: 1px solid var(--line);
}

/* ---------- 路径图 ---------- */
.page-faq .faq-flow {
  margin: 0 0 clamp(20px, 3vw, 28px);
  padding: 14px clamp(10px, 2vw, 20px);
  border: 1px dashed var(--line-strong);
  background: linear-gradient(180deg, rgba(44, 229, 208, 0.04), transparent 70%);
  overflow-x: auto;
}

.page-faq .faq-tree {
  display: block;
  width: 100%;
  min-width: 460px;
  height: auto;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item > summary {
  position: relative;
  display: block;
  padding: 18px 46px 18px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.75vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color 0.16s ease, padding-left 0.16s ease;
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 17px;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--cyan);
  transition: transform 0.16s ease;
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
}

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--cyan);
}

.page-faq .faq-item[open] > summary {
  color: var(--cyan);
}

.page-faq .faq-answer {
  display: grid;
  gap: 12px;
  padding: 2px 0 20px;
  max-width: 58ch;
  font-size: clamp(14.5px, 1.6vw, 16px);
  line-height: 1.82;
  color: var(--faq-tint);
  border-left: 1px solid var(--cyan);
  padding-left: 16px;
  margin-left: 1px;
}

.page-faq .faq-answer p {
  margin: 0;
}

.page-faq .faq-answer a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(44, 229, 208, 0.45);
  transition: border-color 0.16s ease;
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-route {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
}

.page-faq .faq-route a {
  color: var(--orange);
  border-bottom: 1px dashed rgba(255, 122, 61, 0.5);
}

.page-faq .faq-route a:hover,
.page-faq .faq-route a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

@media (min-width: 760px) {
  .page-faq .faq-item > summary:hover {
    padding-left: 4px;
  }
  .page-faq .faq-answer {
    padding-left: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item > summary,
  .page-faq .faq-toc__link,
  .page-faq .faq-answer a {
    transition: none;
  }
  .page-faq .faq-item > summary:hover {
    padding-left: 0;
  }
}