.page-faq {
  --faq-rule: rgba(58, 74, 107, 0.55);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-block: clamp(16px, 2.4vw, 28px) 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(20px, 3.2vw, 40px) clamp(28px, 4vw, 52px);
}

.page-faq .faq-hero__kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  max-width: 17ch;
  font-family: var(--font-narrow);
  font-weight: 800;
  font-size: clamp(32px, 6.4vw, 74px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-faq .faq-hero__lead {
  margin: clamp(16px, 2.2vw, 22px) 0 0;
  max-width: 64ch;
  color: var(--muted);
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.78;
}

.page-faq .faq-facts {
  list-style: none;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-rule);
  border: 1px solid var(--faq-rule);
}

.page-faq .faq-fact {
  background: var(--indigo);
  padding: clamp(12px, 1.8vw, 18px);
}

.page-faq .faq-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.05;
  color: var(--lime);
}

.page-faq .faq-fact__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--steel);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  padding-bottom: clamp(48px, 6vw, 96px);
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  align-self: start;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-index__label {
  display: none;
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--steel);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 2px 10px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  padding: 7px 12px;
  border: 1px solid var(--lane);
  border-radius: var(--radius);
  color: var(--steel);
  font-size: 13px;
  text-decoration: none;
  transition: color 120ms ease, border-color 120ms ease, background-color 120ms ease;
}

.page-faq .faq-index__link .mono {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--chalk);
  border-color: var(--orange);
  background: rgba(255, 122, 47, 0.08);
}

/* ---------- 问题分区 ---------- */
.page-faq .faq-section {
  scroll-margin-top: 96px;
  padding-top: clamp(26px, 3.4vw, 44px);
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(26px, 3.6vw, 48px);
}

.page-faq .faq-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: clamp(12px, 1.8vw, 20px);
  align-items: baseline;
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-faq .faq-section__num {
  grid-column: 1;
  grid-row: 1;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-section__title {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 2.8vw, 32px);
  line-height: 1.25;
  color: var(--chalk);
}

.page-faq .faq-section__lead {
  grid-column: 2;
  margin: 8px 0 0;
  max-width: 60ch;
  color: var(--steel);
  font-size: 14.5px;
  line-height: 1.7;
}

/* ---------- 图片 ---------- */
.page-faq .faq-media {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-end__media {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
}

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

/* ---------- 问答卡 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-rule);
}

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

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: clamp(14px, 2vw, 18px) 2px;
  cursor: pointer;
  list-style: none;
  color: var(--chalk);
  font-size: clamp(15px, 1.35vw, 16.5px);
  font-weight: 600;
  line-height: 1.55;
  transition: color 120ms ease;
}

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

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

.page-faq .qa__q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  padding-left: 12px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.3;
  color: var(--cyan);
  transition: color 120ms ease;
}

.page-faq .qa__q:hover,
.page-faq .qa[open] .qa__q {
  color: var(--cyan);
}

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

.page-faq .qa__a {
  max-width: 68ch;
  padding: 0 34px clamp(16px, 2.2vw, 22px) 2px;
  color: var(--muted);
  font-size: clamp(14.5px, 1.3vw, 16px);
  line-height: 1.78;
}

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

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

.page-faq .qa[open] .qa__a {
  animation: faq-reveal 200ms ease-out;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 收束区 ---------- */
.page-faq .faq-end {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--indigo);
  border: 1px solid var(--lane);
  border-left: 3px solid var(--orange);
}

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

.page-faq .faq-end__steps li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: var(--chalk);
  font-size: 14.5px;
  line-height: 1.6;
}

.page-faq .faq-end__steps .mono {
  font-size: 12px;
  color: var(--lime);
}

.page-faq .faq-end__contact {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  color: var(--steel);
  font-size: 14px;
}

.page-faq .faq-end__contact .mono {
  color: var(--chalk);
}

.page-faq .faq-end__note {
  margin: 0;
  max-width: 62ch;
  color: var(--steel);
  font-size: 13px;
  line-height: 1.7;
}

.page-faq .faq-end__actions {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 中等屏 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-end__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 宽屏：侧边索引吸附 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(32px, 4.5vw, 72px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 104px;
    border-bottom: 0;
  }

  .page-faq .faq-index__label {
    display: block;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    padding: 0;
    overflow: visible;
  }

  .page-faq .faq-index__link {
    border: 0;
    border-left: 2px solid var(--lane);
    border-radius: 0;
    padding: 8px 0 8px 14px;
    background: none;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--orange);
    background: none;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .qa__q,
  .page-faq .qa__q::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}