.page-faq {
  display: block;
}

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

/* ---------- 页头 ---------- */

.page-faq .faq-head {
  padding-block: clamp(20px, 3.6vw, 40px) clamp(18px, 3vw, 30px);
}

.page-faq .faq-head h1 {
  margin: 12px 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.4vw, 52px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-faq .faq-head .lede {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-head__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 顶部横幅 ---------- */

.page-faq .faq-banner {
  position: relative;
  margin: 0 0 clamp(28px, 5vw, 52px);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-3);
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

@media (min-width: 760px) {
  .page-faq .faq-banner img {
    aspect-ratio: 2 / 1;
  }
}

/* ---------- 主体布局 ---------- */

.page-faq .faq-body {
  padding-block: 0 clamp(48px, 7vw, 88px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }
}

/* ---------- 左侧环节索引 ---------- */

.page-faq .faq-index {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 16px 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}

.page-faq .faq-index__list a:hover {
  background: var(--ink-3);
  border-left-color: var(--cyan);
}

.page-faq .faq-index__list a[aria-current="true"] {
  background: var(--ink-3);
  border-left-color: var(--acid);
  color: var(--acid);
}

.page-faq .faq-index__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

.page-faq .faq-index__list a[aria-current="true"] .faq-index__num {
  color: var(--acid);
}

.page-faq .faq-index__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 600px) {
  .page-faq .faq-index__list {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    padding: 18px 16px;
  }
}

/* ---------- 问答区块 ---------- */

.page-faq .faq-block {
  scroll-margin-top: 110px;
}

.page-faq .faq-block + .faq-block {
  margin-top: clamp(32px, 5vw, 56px);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px dashed var(--line);
}

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-faq .faq-block__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--acid);
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 28px);
  letter-spacing: -.01em;
  line-height: 1.3;
  color: var(--text);
}

/* ---------- 折叠问答 ---------- */

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

.page-faq .qa {
  border: 1px solid var(--line);
  background: var(--ink-2);
  box-shadow: var(--shadow-soft);
  transition: border-color .2s ease, box-shadow .2s ease;
}

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

.page-faq .qa[open] {
  border-color: var(--cyan);
  box-shadow: var(--shadow);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 48px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  transition: color .2s ease;
}

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

.page-faq .qa__q::marker {
  content: "";
}

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

.page-faq .qa__num {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

.page-faq .qa__caret {
  flex: none;
  margin: 4px 0 0 auto;
  color: var(--cyan);
  transition: transform .25s ease;
}

.page-faq .qa[open] .qa__caret {
  transform: rotate(180deg);
}

.page-faq .qa__a {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
}

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

.page-faq .qa__a p + p {
  margin-top: 10px;
}

@media (min-width: 600px) {
  .page-faq .qa__a {
    padding-left: 41px;
  }
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.page-faq .qa__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 14px;
  color: var(--cyan);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.6;
}

.page-faq .qa__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}

.page-faq .qa__link:hover::after,
.page-faq .qa__link:focus-visible::after {
  transform: scaleX(1);
}

.page-faq .qa__link svg {
  flex: none;
}

/* ---------- 数据章节配图 ---------- */

.page-faq .faq-figure {
  margin: 24px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-3);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 联系方式与收口 ---------- */

.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 20px;
}

@media (min-width: 700px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .faq-contact__item {
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  background: var(--ink-2);
  padding: 16px 18px;
}

.page-faq .faq-contact__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-faq .faq-contact__value {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.5;
  color: var(--text);
  word-break: break-all;
}

.page-faq .faq-foot {
  margin-top: 24px;
  padding: 20px 18px;
  border: 1px solid var(--line);
  background: var(--ink-3);
}

.page-faq .faq-foot p {
  margin: 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-foot__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* ---------- 窄屏微调 ---------- */

@media (max-width: 480px) {
  .page-faq .faq-index__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .qa__q {
    font-size: 14.5px;
    padding: 14px;
  }

  .page-faq .qa__a {
    padding: 12px 14px 16px;
  }

  .page-faq .faq-head__actions .btn,
  .page-faq .faq-foot__actions .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__caret,
  .page-faq .qa__q,
  .page-faq .qa__link::after,
  .page-faq .faq-index__list a {
    transition: none;
  }
}