.page-faq {
  --blk: var(--cyan);
}

.page-faq section[id],
.page-faq .qa-block[id] {
  scroll-margin-top: 96px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  padding-top: 28px;
}

.page-faq .faq-intro-grid {
  display: grid;
  gap: 36px;
  margin-top: 26px;
}

.page-faq .faq-intro-lead h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 7.4vw, 56px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-intro-lead .section-lead {
  margin: 18px 0 0;
  max-width: 46ch;
  color: var(--text-dim);
}

/* ---------- 四色分类块 ---------- */
.page-faq .faq-cats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-cat {
  --cat: var(--cyan);
  position: relative;
  display: grid;
  gap: 6px;
  padding: 20px 20px 22px;
  border: 1px solid var(--outline);
  border-radius: var(--r-lg);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  overflow: hidden;
  transition: transform .24s var(--ease), border-color .24s var(--ease), background-color .24s var(--ease);
}

.page-faq .faq-cat::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: var(--cat);
  opacity: .85;
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  transform: translateY(-4px);
  border-color: var(--cat);
  background: var(--surface-2);
}

.page-faq .faq-cat--amber { --cat: var(--amber); }
.page-faq .faq-cat--cyan  { --cat: var(--cyan); }
.page-faq .faq-cat--neon  { --cat: var(--neon); }
.page-faq .faq-cat--cool  { --cat: var(--cool); }

.page-faq .cat-num {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--cat);
}

.page-faq .cat-label {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .cat-meta {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--text-faint);
}

/* ---------- 问答分栏 ---------- */
.page-faq .qa-block {
  margin-top: 76px;
}

.page-faq .qa-block-inner {
  display: grid;
  gap: 24px;
}

.page-faq .qa-aside {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .qa-num {
  font-family: var(--font-mono);
  font-size: clamp(40px, 13vw, 76px);
  line-height: .9;
  letter-spacing: .02em;
  color: var(--blk);
}

.page-faq .qa-title {
  margin: 0;
  font-size: clamp(21px, 4.6vw, 28px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .qa-side-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-faint);
  max-width: 34ch;
}

.page-faq .qa-block--amber { --blk: var(--amber); }
.page-faq .qa-block--cyan  { --blk: var(--cyan); }
.page-faq .qa-block--neon  { --blk: var(--neon); }
.page-faq .qa-block--cool  { --blk: var(--cool); }

.page-faq .qa-block .qa-title {
  padding-left: 14px;
  box-shadow: inset 3px 0 0 var(--blk);
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  position: relative;
  padding-left: 14px;
  border-bottom: 1px solid var(--outline);
}

.page-faq .qa:first-of-type {
  border-top: 1px solid var(--outline);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: var(--r-pill);
  background: var(--blk);
  opacity: 0;
  transition: opacity .22s var(--ease);
}

.page-faq .qa[open]::before,
.page-faq .qa:hover::before {
  opacity: 1;
}

.page-faq .qa summary {
  display: block;
  position: relative;
  padding: 18px 42px 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--text);
}

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

.page-faq .qa summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 21px;
  line-height: 1.4;
  color: var(--blk);
  transition: transform .22s var(--ease);
}

.page-faq .qa[open] summary::after {
  content: "–";
}

.page-faq .qa-body {
  padding: 0 42px 20px 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-dim);
  max-width: 62ch;
}

.page-faq .qa-body p {
  margin: 0 0 10px;
}

.page-faq .qa-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 28px;
  max-width: 100%;
}

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

.page-faq .faq-figure--wide {
  margin-bottom: 34px;
}

.page-faq .media-caption {
  font-size: 12.5px;
  letter-spacing: .03em;
}

/* ---------- 三步流程带 ---------- */
.page-faq .step-band {
  list-style: none;
  margin: 0 0 34px;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .step-node {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 20px 20px 22px;
  border: 1px solid var(--outline);
  border-radius: var(--r-pill) var(--r-pill) var(--r-lg) var(--r-lg);
  background: var(--surface);
}

.page-faq .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--r-pill);
  background: var(--blk);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
}

.page-faq .step-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .step-desc {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text-dim);
}

/* ---------- 收尾 CTA ---------- */
.page-faq .faq-cta {
  margin: 30px 0 0;
}

/* ---------- 移动端常驻客服 ---------- */
.page-faq .faq-float {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 40;
  box-shadow: 0 10px 26px rgba(0, 0, 0, .5);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .step-band {
    gap: 24px;
  }

  .page-faq .faq-float {
    display: none;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-intro-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .qa-block {
    margin-top: 96px;
  }

  .page-faq .qa-block-inner {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .qa-aside {
    position: sticky;
    top: 98px;
  }

  .page-faq .qa-num {
    font-size: 64px;
  }

  .page-faq .qa-side-note {
    max-width: 100%;
  }

  .page-faq .step-band {
    position: relative;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
    padding-top: 6px;
  }

  .page-faq .step-band::before {
    content: "";
    position: absolute;
    top: 26px;
    left: 12%;
    right: 12%;
    border-top: 2px dashed var(--outline);
  }

  .page-faq .step-node {
    background: var(--surface);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-figure {
    max-width: 460px;
  }

  .page-faq .faq-figure--wide {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .qa::before,
  .page-faq .qa summary::after {
    transition: none;
  }

  .page-faq .faq-cat:hover,
  .page-faq .faq-cat:focus-visible {
    transform: none;
  }
}