.page-faq {
  --faq-accent: var(--cyan);
  --faq-gap: clamp(20px, 3vw, 34px);
  --faq-answer: rgba(242, 247, 250, .78);
  display: block;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  line-height: 1.65;
  padding-top: var(--header-h);
  max-width: 100%;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 46px) 0 clamp(26px, 4vw, 44px);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-faq .faq-hero-slab {
  position: absolute;
  top: -20%;
  right: -10%;
  width: min(70%, 640px);
  height: 140%;
  background: linear-gradient(158deg, var(--glow-cy), rgba(10, 22, 34, 0) 62%, var(--glow-or));
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
}

.page-faq .faq-hero-inner .crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  display: flex;
  gap: 8px;
  align-items: center;
}

.page-faq .faq-hero-inner .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .faq-hero-inner .crumbs a:hover,
.page-faq .faq-hero-inner .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-cy);
}

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

.page-faq .faq-hero-inner .title-xl {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6.4vw, 60px);
  line-height: 1.08;
  letter-spacing: .03em;
  transform: scaleX(.94);
  transform-origin: left center;
  max-width: 20ch;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 40ch;
  color: var(--faq-answer);
  font-size: clamp(14px, 1.5vw, 16px);
}

.page-faq .faq-hero-tags {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-hero-tags li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 4px 10px;
  background: rgba(16, 35, 58, .6);
}

.page-faq .faq-hero-media {
  margin: 10px 0 0;
  max-width: 100%;
}

.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
  object-position: center 40%;
}

/* ---------- 主布局 ---------- */
.page-faq .faq-body {
  padding: clamp(30px, 5vw, 60px) 0 clamp(44px, 7vw, 90px);
}

.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  border-top: 1px solid var(--line);
  padding-top: 14px;
  min-width: 0;
}

.page-faq .faq-index .kicker {
  display: block;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: fidx;
}

.page-faq .faq-index-list li {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-index-link {
  display: block;
  padding: 9px 8px 9px 12px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 13.5px;
  letter-spacing: .03em;
  text-decoration: none;
  transition: color .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--white);
  border-left-color: var(--cyan);
  background: rgba(43, 224, 210, .06);
}

.page-faq .faq-index .annot {
  display: block;
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 18px);
  padding-top: clamp(6px, 1.5vw, 14px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 60px);
  padding-top: clamp(24px, 3.5vw, 40px);
  border-top: 1px solid var(--line-soft);
}

.page-faq #start { --faq-accent: var(--cyan); }
.page-faq #data { --faq-accent: var(--orange); }
.page-faq #account { --faq-accent: var(--yellow); }
.page-faq #rhythm { --faq-accent: var(--green); }
.page-faq #contact { --faq-accent: var(--cyan); }
.page-faq #escalate { --faq-accent: var(--orange); }

.page-faq .faq-group-head {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 68px;
  height: 3px;
  background: var(--faq-accent);
}

.page-faq .faq-group-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--faq-accent);
}

.page-faq .faq-group-head .title-lg {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 26px);
  letter-spacing: .04em;
  line-height: 1.2;
}

/* 问题条目 */
.page-faq .qa {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  letter-spacing: .045em;
  line-height: 1.5;
  color: var(--white);
  transition: color .16s var(--ease);
}

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

.page-faq .qa-q::before {
  content: "+";
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--faq-accent);
  border: 1px solid var(--line-cy);
  transition: background-color .16s var(--ease), color .16s var(--ease);
}

.page-faq .qa[open] .qa-q::before {
  content: "\2212";
  background: var(--faq-accent);
  border-color: var(--faq-accent);
  color: var(--ink);
}

.page-faq .qa-q:hover { color: var(--faq-accent); }

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

.page-faq .qa-a {
  padding: 0 0 16px 32px;
}

.page-faq .qa-a p {
  margin: 0 0 8px;
  max-width: 42ch;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--faq-answer);
}

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

.page-faq .qa-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cy);
}

.page-faq .qa-a a:hover,
.page-faq .qa-a a:focus-visible { color: var(--white); }

.page-faq .qa-note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--muted);
}

/* 区间示意 */
.page-faq .faq-figure {
  margin: 22px 0 0;
  padding: clamp(14px, 2.4vw, 22px);
  background: var(--ink-2);
  border: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(242, 247, 250, .03) inset;
}

.page-faq .faq-figure svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .fig-cap {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--muted);
}

.page-faq .faq-data-media {
  margin: 20px 0 0;
  max-width: 100%;
}

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

/* 收尾行动区 */
.page-faq .faq-group--last {
  padding-bottom: 8px;
}

.page-faq .faq-cta {
  margin-top: 24px;
  padding: clamp(18px, 3vw, 28px);
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-faq .faq-cta .btn { flex: none; }

.page-faq .faq-cta-note {
  flex: 1 1 100%;
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-cta-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cy);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero-media img { max-height: 360px; }

  .page-faq .faq-hero-tags li { font-size: 12.5px; }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    border-top: none;
    padding-top: 0;
  }

  .page-faq .faq-index .annot {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    position: absolute;
    left: -26px;
    top: 42px;
    margin: 0;
    letter-spacing: .16em;
  }

  .page-faq .faq-index { padding-left: 0; }

  .page-faq .faq-body { padding-top: clamp(40px, 5vw, 68px); }

  .page-faq .faq-cta { align-items: center; }

  .page-faq .faq-cta-note { flex: 1 1 auto; }
}

@media (min-width: 1240px) {
  .page-faq .faq-layout { grid-template-columns: 252px minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-q,
  .page-faq .faq-index-link,
  .page-faq .faq-hero-inner .crumbs a {
    transition: none;
  }
}