.page-faq {
  --faq-gap: clamp(16px, 3vw, 32px);
  --faq-stage: var(--acid);
  background: var(--ink-900);
  color: var(--bone);
}

.page-faq .faq-hero {
  position: relative;
  padding: clamp(18px, 4vw, 36px) 0 clamp(32px, 6vw, 64px);
  border-bottom: 1px solid var(--hairline);
  background:
    radial-gradient(760px 380px at 84% 0%, rgba(182, 255, 59, 0.12), transparent 62%),
    linear-gradient(180deg, var(--ink-950) 0%, var(--ink-900) 82%);
}

.page-faq .breadcrumbs {
  margin-bottom: clamp(16px, 3vw, 28px);
}

.page-faq .hero-frame {
  position: relative;
  padding: clamp(18px, 3.4vw, 40px);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(30, 43, 39, 0.86), rgba(11, 31, 26, 0.55));
  overflow: hidden;
}

.page-faq .hero-frame::before,
.page-faq .hero-frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 2px solid var(--acid);
  opacity: 0.85;
  pointer-events: none;
}

.page-faq .hero-frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .hero-frame::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
}

.page-faq .hero-grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .hero-copy h1 {
  font-family: var(--f-display);
  font-size: clamp(29px, 6.2vw, 56px);
  line-height: 1.08;
  letter-spacing: 0.01em;
  margin: 14px 0 16px;
  color: var(--bone);
}

.page-faq .hero-copy .lede {
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(232, 227, 214, 0.82);
}

.page-faq .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.page-faq .chip {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--bone);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .chip:hover,
.page-faq .chip:focus-visible {
  color: var(--acid);
  border-color: var(--acid);
  background: rgba(182, 255, 59, 0.08);
  outline: none;
}

.page-faq .hero-figure {
  margin: 0;
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  overflow: hidden;
}

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

.page-faq .hero-frame .stat-strip {
  margin-top: clamp(18px, 3vw, 28px);
  border-top: 1px solid var(--hairline);
  padding-top: clamp(12px, 2vw, 18px);
}

.page-faq .faq-body {
  padding: clamp(28px, 5vw, 64px) 0 clamp(44px, 7vw, 88px);
}

.page-faq .faq-grid {
  display: grid;
  gap: clamp(20px, 2.8vw, 34px);
}

/* ---------- 左侧编号索引 ---------- */
.page-faq .faq-rail {
  border-top: 2px solid var(--acid);
  padding-top: 12px;
}

.page-faq .faq-rail .label {
  margin: 0 0 10px;
  color: var(--stone);
}

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

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  color: var(--stone);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-rail__link .mono {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--clay);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--bone);
  border-color: var(--acid);
  outline: none;
}

.page-faq .faq-rail__link[data-stage-active] {
  color: var(--acid);
  border-color: var(--acid);
  background: rgba(182, 255, 59, 0.08);
}

.page-faq .faq-rail__now {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.page-faq .faq-rail__now .mono {
  color: var(--acid);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-sec {
  scroll-margin-top: calc(var(--header-h) + 16px);
  margin-bottom: clamp(28px, 4vw, 56px);
}

.page-faq .faq-sec--01 { --faq-stage: var(--acid); }
.page-faq .faq-sec--02 { --faq-stage: var(--clay); }
.page-faq .faq-sec--03 { --faq-stage: var(--ember); }
.page-faq .faq-sec--04 { --faq-stage: var(--bone); }
.page-faq .faq-sec--05 { --faq-stage: var(--stone); }
.page-faq .faq-sec--06 { --faq-stage: var(--acid); }

.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hairline-strong);
  margin-bottom: 14px;
}

.page-faq .faq-sec__no {
  flex: 0 0 auto;
  padding: 3px 6px;
  border: 1px solid var(--faq-stage);
  border-radius: 2px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--faq-stage);
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--f-display);
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--bone);
}

.page-faq .faq-sec__intro {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--stone);
}

/* ---------- 路径图 ---------- */
.page-faq .path-figure {
  margin: 4px 0 18px;
  padding: 12px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  background: rgba(244, 241, 232, 0.05);
}

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

.page-faq .path-figure figcaption {
  margin-top: 10px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  border-top: 1px solid var(--hairline);
  background: linear-gradient(180deg, rgba(30, 43, 39, 0.5), rgba(30, 43, 39, 0.22));
}

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--hairline);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 10px;
  list-style: none;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

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

.page-faq .qa summary:hover {
  background: rgba(182, 255, 59, 0.07);
}

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

.page-faq .qa__no {
  flex: 0 0 34px;
  padding-top: 3px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--faq-stage);
}

.page-faq .qa__q {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--bone);
}

.page-faq .qa summary::after {
  flex: 0 0 auto;
  content: "+";
  padding-top: 1px;
  font-family: var(--f-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--acid);
}

.page-faq .qa[open] summary {
  color: var(--acid);
}

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

.page-faq .qa[open] {
  background: rgba(30, 43, 39, 0.78);
}

.page-faq .qa__a {
  margin-left: 10px;
  padding: 2px 12px 16px 22px;
  border-left: 2px solid var(--faq-stage);
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(232, 227, 214, 0.78);
}

.page-faq .faq-inline-link {
  margin: 18px 0 0;
}

/* ---------- 联系方式条 ---------- */
.page-faq .contact-rows {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.page-faq .contact-row {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  background: rgba(30, 43, 39, 0.62);
}

.page-faq .contact-row__k {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-faq .contact-row__v {
  font-size: 15px;
  line-height: 1.6;
  color: var(--bone);
  word-break: break-word;
}

/* ---------- 右侧快捷栏 ---------- */
.page-faq .faq-aside {
  display: grid;
  gap: 16px;
}

.page-faq .faq-aside .media-frame {
  margin: 0;
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  overflow: hidden;
}

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

.page-faq .aside-card {
  padding: 16px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-md);
  background: var(--glass);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.page-faq .aside-card__title {
  margin: 0 0 12px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--acid);
}

.page-faq .aside-links {
  list-style: none;
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.page-faq .aside-links a {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 7px;
  border-bottom: 1px dashed var(--hairline);
  font-size: 14px;
  color: var(--bone);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-faq .aside-links a:hover,
.page-faq .aside-links a:focus-visible {
  color: var(--acid);
  outline: none;
}

.page-faq .aside-note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-faq .contact-rows {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .contact-row--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-faq .hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-faq .qa__q {
    font-size: 17px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-grid {
    grid-template-columns: 168px minmax(0, 1fr) 244px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

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

  .page-faq .faq-rail__link {
    border: 0;
    border-left: 2px solid var(--hairline);
    border-radius: 0;
    padding: 9px 10px;
    white-space: normal;
  }

  .page-faq .faq-rail__link[data-stage-active] {
    border-left-color: var(--acid);
  }

  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .faq-sec {
    margin-bottom: clamp(34px, 4.4vw, 62px);
  }
}