.page-faq {
  --faq-line: rgba(242, 239, 230, 0.13);
  --faq-line-strong: rgba(242, 239, 230, 0.28);
  --faq-answer: rgba(242, 239, 230, 0.86);
  background-color: var(--ink-green);
  color: var(--bone-white);
}

.page-faq :focus-visible {
  outline: 2px solid var(--signal-cyan);
  outline-offset: 3px;
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  padding: 32px 0 50px;
  background-image: var(--glow-gradient);
  border-bottom: 1px solid var(--faq-line);
  overflow: hidden;
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .breadcrumbs {
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-faq .breadcrumbs a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid rgba(124, 138, 133, 0.45);
}

.page-faq .breadcrumbs a:hover {
  color: var(--signal-cyan);
  border-bottom-color: var(--signal-cyan);
}

.page-faq .section-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--signal-cyan);
}

.page-faq h1 {
  margin: 0 0 18px;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 6.4vw, 50px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-faq .section-lede {
  margin: 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--faq-answer);
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 42px;
  margin: 30px 0 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--faq-line-strong);
}

.page-faq .faq-hero-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.page-faq .faq-hero-stats .stat-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  color: var(--signal-cyan);
}

.page-faq .faq-hero-stats .stat-value--ember {
  color: var(--ember-orange);
}

.page-faq .faq-hero-stats .stat-label {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-faq .faq-hero-figure {
  position: relative;
  margin: 0;
  width: 100%;
  max-width: 460px;
  border: 1px solid var(--faq-line-strong);
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .faq-hero-figure::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 92px;
  height: 6px;
  background-color: var(--signal-cyan);
}

/* ===== 主体：左索引 + 右答案 ===== */
.page-faq .faq-body {
  padding: 36px 0 84px;
}

.page-faq .faq-layout {
  display: grid;
  gap: 30px;
}

.page-faq .faq-index {
  padding: 18px 14px;
  border: 1px solid var(--faq-line);
  background-color: var(--glass-ink);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  padding: 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-index-nav {
  display: flex;
  flex-direction: column;
}

.page-faq .faq-index-link {
  display: block;
  padding: 10px 10px 10px 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: rgba(242, 239, 230, 0.82);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-index-link:hover {
  color: var(--signal-cyan);
  background-color: rgba(47, 230, 200, 0.08);
}

.page-faq .faq-index-link[aria-current="true"] {
  color: var(--signal-cyan);
  border-left-color: var(--signal-cyan);
  background-color: rgba(47, 230, 200, 0.1);
}

.page-faq .faq-index-foot {
  margin: 16px 0 0;
  padding: 14px 10px 0;
  border-top: 1px solid var(--faq-line);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--slate);
}

.page-faq .faq-index-foot a {
  color: var(--ember-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 91, 54, 0.42);
}

.page-faq .faq-index-foot a:hover {
  color: var(--bone-white);
  border-bottom-color: var(--bone-white);
}

.page-faq .faq-answers {
  display: flex;
  flex-direction: column;
  gap: 56px;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 150px;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--faq-line-strong);
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ember-orange);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3.6vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-faq .faq-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
}

/* ===== 问答条目 ===== */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 2px;
  list-style: none;
  cursor: pointer;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--bone-white);
  transition: color 0.2s ease;
}

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

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

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

.page-faq .faq-q-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--slate);
  transition: color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-q:hover .faq-q-num {
  color: var(--signal-cyan);
  transform: translateX(2px);
}

.page-faq .faq-q-text {
  min-width: 0;
}

.page-faq .faq-q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--slate);
}

.page-faq .faq-item[open] .faq-q::after {
  content: "−";
  color: var(--signal-cyan);
}

.page-faq .faq-a {
  margin: 0;
  padding: 2px 2px 24px 16px;
  border-left: 1px solid var(--faq-line-strong);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--faq-answer);
}

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

.page-faq .faq-a p + p {
  margin-top: 12px;
}

.page-faq .faq-a-more {
  display: inline-block;
  margin-top: 16px;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--signal-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 230, 200, 0.42);
}

.page-faq .faq-a-more:hover {
  color: var(--bone-white);
  border-bottom-color: var(--bone-white);
}

/* ===== 操作步骤 ===== */
.page-faq .faq-steps {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 10px 12px;
  background-color: rgba(22, 48, 42, 0.5);
  border-left: 2px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-steps li:hover {
  background-color: rgba(22, 48, 42, 0.92);
  border-left-color: var(--ember-orange);
}

.page-faq .faq-step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--amber);
}

/* ===== 配图 ===== */
.page-faq .faq-figure {
  margin: 24px 0 4px;
  border: 1px solid var(--faq-line-strong);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--slate);
  border-top: 1px solid var(--faq-line);
}

/* ===== 联系方式 ===== */
.page-faq .faq-contact {
  display: grid;
  gap: 1px;
  margin: 16px 0 0;
  padding: 0;
  background-color: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-contact > div {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  background-color: rgba(22, 48, 42, 0.62);
}

.page-faq .faq-contact dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-faq .faq-contact dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--bone-white);
  word-break: break-word;
}

/* ===== 响应式 ===== */
@media (min-width: 640px) {
  .page-faq .faq-a {
    margin-left: 26px;
    padding-left: 20px;
    max-width: 68ch;
  }

  .page-faq .faq-contact > div {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 54px 0 72px;
  }

  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.58fr);
    gap: 56px;
    align-items: end;
  }

  .page-faq .faq-hero-figure {
    justify-self: end;
    max-width: 380px;
  }

  .page-faq .faq-hero-figure img {
    aspect-ratio: 3 / 4;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    padding: 48px 0 104px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 272px minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 138px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index-link,
  .page-faq .faq-q,
  .page-faq .faq-q-num,
  .page-faq .faq-steps li {
    transition: none;
  }
}