.page-faq {
  --faq-pad: clamp(16px, 2.4vw, 26px);
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 6.5vw, 72px) 0 clamp(34px, 6vw, 68px);
  background:
    radial-gradient(circle at 86% 4%, rgba(44, 242, 206, 0.16), transparent 46%),
    linear-gradient(115deg, var(--c-deep) 0%, var(--c-deep) 58%, var(--c-night) 58%, var(--c-night) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -12% -8% 0 -8%;
  background-image: repeating-linear-gradient(
    115deg,
    rgba(30, 53, 95, 0.62) 0 1px,
    transparent 1px 74px
  );
  opacity: 0.55;
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 5vw, 52px);
}

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

.page-faq .faq-hero .breadcrumbs-list {
  color: rgba(243, 237, 224, 0.6);
}

.page-faq .faq-hero .breadcrumbs-list a {
  color: rgba(243, 237, 224, 0.78);
}

.page-faq .faq-kicker {
  margin: 18px 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 5.6vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--c-white);
}

.page-faq .faq-lede {
  margin: 0 0 26px;
  max-width: 40em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: rgba(243, 237, 224, 0.78);
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 30px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-left: 12px;
  border-left: 2px solid var(--c-cyan);
}

.page-faq .faq-stat-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1;
  color: var(--c-white);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-stat-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(243, 237, 224, 0.6);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hero-figure {
  position: relative;
  margin: 0;
  padding: 10px;
  background: rgba(16, 42, 82, 0.55);
  border: 1px solid rgba(44, 242, 206, 0.28);
}

.page-faq .faq-hero-figure::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 46px;
  height: 3px;
  background: var(--c-yellow);
}

.page-faq .faq-hero-figure .figure-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(243, 237, 224, 0.56);
}

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

/* ---------- 正文长卷 ---------- */
.page-faq .faq-body {
  position: relative;
  padding: clamp(38px, 6.5vw, 76px) 0 clamp(52px, 8vw, 104px);
  background: var(--c-deep);
}

.page-faq .faq-body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(44, 242, 206, 0.45) 22%,
    rgba(44, 242, 206, 0.45) 78%,
    transparent
  );
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(26px, 4.5vw, 56px);
}

.page-faq .faq-main {
  min-width: 0;
}

/* 目录 */
.page-faq .faq-toc-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
}

.page-faq .faq-toc-list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-toc-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid rgba(44, 242, 206, 0.22);
  border-radius: var(--capsule);
  white-space: nowrap;
  font-size: 14px;
  color: rgba(243, 237, 224, 0.74);
  text-decoration: none;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-faq .faq-toc-list a:hover,
.page-faq .faq-toc-list a:focus-visible {
  color: var(--c-cyan);
  border-color: var(--line-strong);
}

.page-faq .faq-toc-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-cyan);
}

/* 章节 */
.page-faq .faq-block + .faq-block {
  margin-top: clamp(44px, 7vw, 82px);
}

.page-faq .faq-block-head {
  margin-bottom: clamp(16px, 2.6vw, 26px);
}

.page-faq .faq-block-head .chapter-num {
  display: block;
  margin-bottom: 10px;
}

.page-faq .faq-block-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--c-white);
}

.page-faq .faq-block-desc {
  margin: 0;
  max-width: 48em;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(243, 237, 224, 0.6);
}

/* 问答折叠卡 */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-item {
  background: var(--c-paper);
  border: 1px solid rgba(16, 21, 28, 0.08);
  border-left: 3px solid var(--c-grid);
  transition: border-color 0.22s var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--c-cyan);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: var(--faq-pad);
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.5vw, 16.5px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-ink);
}

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

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

.page-faq .faq-item[open] .faq-q {
  padding-bottom: 10px;
}

.page-faq .faq-q-mark {
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  display: grid;
  place-items: center;
  background: var(--c-deep);
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
}

.page-faq .faq-q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-q-toggle {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 3px;
}

.page-faq .faq-q-toggle::before,
.page-faq .faq-q-toggle::after {
  content: "";
  position: absolute;
  background: var(--c-deep);
  transition: transform 0.24s var(--ease), opacity 0.24s var(--ease);
}

.page-faq .faq-q-toggle::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .faq-q-toggle::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}

.page-faq .faq-item[open] .faq-q-toggle::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-a {
  padding: 0 var(--faq-pad) calc(var(--faq-pad) + 4px) calc(var(--faq-pad) + 36px);
  font-size: 15px;
  line-height: 1.78;
  color: rgba(16, 21, 28, 0.78);
}

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

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

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

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

.page-faq .faq-a strong {
  color: var(--c-ink);
  font-weight: 700;
}

/* 联系方式列表 */
.page-faq .faq-contact-list {
  display: grid;
  gap: 8px;
  margin: 14px 0 10px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
}

.page-faq .faq-contact-list .data-label {
  min-width: 70px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(16, 21, 28, 0.5);
}

.page-faq .faq-contact-value {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-deep);
  word-break: break-all;
}

/* 章节内插图 */
.page-faq .faq-inline-figure {
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-inline-figure .figure-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(243, 237, 224, 0.54);
}

/* 收尾 */
.page-faq .faq-next {
  margin-top: clamp(44px, 7vw, 80px);
  padding-top: clamp(22px, 3.5vw, 32px);
  border-top: 1px solid rgba(44, 242, 206, 0.28);
}

.page-faq .faq-next-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.2;
  color: var(--c-white);
}

.page-faq .faq-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }

  .page-faq .faq-hero-figure {
    transform: translateY(-8px);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-toc-list {
    display: block;
    overflow: visible;
    padding: 4px 0 4px 18px;
    position: relative;
  }

  .page-faq .faq-toc-list::before {
    content: "";
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 1px;
    background: linear-gradient(
      180deg,
      var(--line-strong),
      rgba(44, 242, 206, 0)
    );
  }

  .page-faq .faq-toc-list li + li {
    margin-top: 13px;
  }

  .page-faq .faq-toc-list a {
    display: block;
    padding: 0;
    border: 0;
    border-radius: 0;
    font-size: 14.5px;
    line-height: 1.45;
    white-space: normal;
  }

  .page-faq .faq-toc-num {
    display: block;
    margin-bottom: 2px;
  }
}

@media (max-width: 600px) {
  .page-faq .faq-a {
    padding-left: var(--faq-pad);
  }

  .page-faq .faq-hero-stats {
    gap: 14px 20px;
  }

  .page-faq .faq-hero-actions .btn,
  .page-faq .faq-next-links .btn {
    flex: 1 1 auto;
    justify-content: center;
    text-align: center;
  }
}