/* ===================== 答疑知识库 · page-faq ===================== */
.page-faq {
  --faq-line-soft: rgba(169, 186, 203, 0.16);
  --faq-line-ink: rgba(36, 28, 23, 0.13);
  --faq-ink-muted: rgba(36, 28, 23, 0.72);
  --faq-ink-faint: rgba(36, 28, 23, 0.44);
  --faq-cyan-wash: rgba(79, 227, 208, 0.08);
  --faq-orange-wash: rgba(255, 122, 69, 0.10);
  background: var(--ink-900);
}

/* ---------- Hero ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 36px 0 54px;
  overflow: hidden;
  color: var(--cream-100);
  background:
    radial-gradient(95% 70% at 88% -12%, rgba(79, 227, 208, 0.13), transparent 62%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-900) 72%, var(--ink-800) 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -160px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 69, 0.18), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero .shell { position: relative; z-index: 1; }

.page-faq .faq-hero .breadcrumbs { margin-bottom: 26px; }

.page-faq .faq-hero .eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--cyan-400);
  text-transform: uppercase;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 34px;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7.4vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--cream-100);
}

.page-faq .faq-hero .lede {
  margin: 20px 0 0;
  max-width: 620px;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--mist-300);
}

.page-faq .faq-hero__aside {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding-top: 22px;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-faq .faq-hero__stat-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan-400);
}

.page-faq .faq-hero__stat-label {
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--mist-300);
}

/* ---------- 分类导航 ---------- */
.page-faq .faq-nav-section {
  padding: 40px 0 52px;
  background: var(--ink-800);
  color: var(--cream-100);
}

.page-faq .faq-nav__title {
  margin: 0 0 26px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.3;
  color: var(--cream-100);
}

.page-faq .faq-nav__figure {
  position: relative;
  margin: 0 0 30px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-900);
  aspect-ratio: 10 / 7;
}

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

.page-faq .faq-nav__figure .media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 14px 18px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--mist-300);
  background: linear-gradient(0deg, rgba(11, 27, 43, 0.9), rgba(11, 27, 43, 0));
}

.page-faq .faq-cats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-faq .faq-cat {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 18px 18px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius-md);
  background: var(--faq-cyan-wash);
  color: var(--cream-100);
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  background: rgba(79, 227, 208, 0.14);
  border-color: var(--cyan-400);
  transform: translateY(-2px);
}

.page-faq .faq-cat__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}

.page-faq .faq-cat__title {
  font-size: 15.5px;
  font-weight: 650;
  letter-spacing: 0.01em;
}

.page-faq .faq-cat__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist-300);
  white-space: nowrap;
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  padding: 48px 0 64px;
  background: var(--cream-100);
  color: var(--brown-900);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: 32px;
}

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

/* 侧栏索引 */
.page-faq .faq-side { min-width: 0; }

.page-faq .faq-side .side-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--faq-ink-faint);
}

.page-faq .faq-side ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-side .side-index__link {
  display: block;
  padding: 10px 12px;
  border-left: 2px solid var(--faq-line-ink);
  font-size: 14px;
  line-height: 1.5;
  color: var(--faq-ink-muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-side .side-index__link:hover { color: var(--brown-900); }

.page-faq .faq-side .side-index__link[aria-current] {
  border-left-color: var(--orange-500);
  background: var(--faq-orange-wash);
  color: var(--brown-900);
  font-weight: 650;
}

/* 分组 */
.page-faq .faq-group {
  padding-bottom: 38px;
  margin-bottom: 38px;
  border-bottom: 1px solid var(--faq-line-ink);
  scroll-margin-top: calc(var(--nav-h) + 20px);
}

.page-faq .faq-group:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-group__head { margin-bottom: 20px; }

.page-faq .faq-group__head .chapter__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--orange-deep);
}

.page-faq .faq-group__head .chapter__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--brown-900);
}

.page-faq .faq-group__lede {
  margin: 12px 0 0;
  max-width: 620px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--faq-ink-muted);
}

/* 图 */
.page-faq .faq-media {
  position: relative;
  margin: 0 0 22px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-800);
  aspect-ratio: 3 / 2;
}

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

.page-faq .faq-media .media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 16px 18px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--cream-100);
  background: linear-gradient(0deg, rgba(11, 27, 43, 0.9), rgba(11, 27, 43, 0));
}

/* 问答条目 */
.page-faq .faq-group { counter-reset: qa; }

.page-faq .qa-item {
  border-top: 1px solid var(--faq-line-ink);
}

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

.page-faq .qa-item summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 2px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 650;
  line-height: 1.6;
  color: var(--brown-900);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .qa-item summary::before {
  counter-increment: qa;
  content: counter(qa, decimal-leading-zero);
  flex: 0 0 auto;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--faq-ink-faint);
}

.page-faq .qa-item summary:hover { color: var(--orange-deep); }

.page-faq .qa-item summary:focus-visible {
  outline: 2px solid var(--orange-500);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.page-faq .qa-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa-item__toggle {
  position: relative;
  flex: 0 0 26px;
  width: 26px;
  height: 26px;
  margin-top: 1px;
  border-radius: 50%;
  border: 1px solid rgba(36, 28, 23, 0.24);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa-item__toggle::before,
.page-faq .qa-item__toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 11px;
  height: 1.6px;
  background: var(--brown-900);
  transform: translate(-50%, -50%);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa-item__toggle::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .qa-item[open] .qa-item__toggle {
  background: var(--orange-500);
  border-color: var(--orange-500);
}

.page-faq .qa-item[open] .qa-item__toggle::before {
  background: #fff;
}

.page-faq .qa-item[open] .qa-item__toggle::after {
  background: #fff;
  opacity: 0;
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .qa-item[open] summary { color: var(--brown-900); }

.page-faq .qa-item__body {
  max-width: 660px;
  padding: 0 2px 22px 36px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--faq-ink-muted);
  animation: faq-fade var(--dur) var(--ease);
}

@keyframes faq-fade {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .qa-item__body p { margin: 0 0 12px; }
.page-faq .qa-item__body p:last-child { margin-bottom: 0; }

.page-faq .qa-item__body a {
  color: var(--orange-deep);
  font-weight: 650;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .qa-item__body a:hover { color: var(--orange-500); }

/* ---------- 联系通道 ---------- */
.page-faq .faq-cta {
  position: relative;
  padding: 44px 0 72px;
  background:
    radial-gradient(80% 90% at 12% 0%, rgba(79, 227, 208, 0.12), transparent 60%),
    var(--ink-900);
  color: var(--cream-100);
}

.page-faq .faq-cta__panel {
  display: grid;
  gap: 34px;
  padding: 32px 24px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(23, 51, 77, 0.72) 0%, rgba(16, 38, 59, 0.86) 100%);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-cta .eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--cyan-400);
}

.page-faq .faq-cta h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 850;
  font-size: clamp(26px, 5vw, 44px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--cream-100);
}

.page-faq .faq-cta__text {
  margin: 14px 0 22px;
  max-width: 560px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist-300);
}

.page-faq .faq-cta__text a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-cta .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-cta__channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-cta__channel {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 2px;
  border-bottom: 1px solid rgba(169, 186, 203, 0.10);
}

.page-faq .faq-cta__channel:last-child { border-bottom: 0; }

.page-faq .faq-cta__channel .footer-contact__k {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--mist-300);
}

.page-faq .faq-cta__channel .footer-contact__v {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--cream-100);
  text-align: right;
  word-break: break-all;
}

.page-faq .faq-cta__channel .footer-contact__v.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--cyan-400);
}

.page-faq .back-to-top {
  position: fixed;
  right: 18px;
  bottom: 20px;
  z-index: 30;
  padding: 10px 16px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--pill);
  background: rgba(16, 38, 59, 0.94);
  color: var(--cyan-400);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .back-to-top:hover,
.page-faq .back-to-top:focus-visible {
  border-color: var(--cyan-400);
  transform: translateY(-2px);
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-cats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-faq .faq-cta__panel { padding: 40px 34px; }
  .page-faq .faq-cta__channels { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 28px; }
  .page-faq .faq-cta__channel { justify-content: flex-start; }
  .page-faq .faq-cta__channel .footer-contact__v { text-align: left; }
}

@media (min-width: 900px) {
  .page-faq .faq-hero { padding: 46px 0 66px; }
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: end;
  }
  .page-faq .faq-hero__aside {
    grid-template-columns: 1fr;
    padding: 6px 0 6px 28px;
    border-top: 0;
    border-left: 1px solid var(--faq-line-soft);
  }
  .page-faq .faq-hero__stat-num { font-size: 32px; }
  .page-faq .faq-nav-section { padding: 52px 0 64px; }
  .page-faq .faq-body { padding: 62px 0 80px; }
  .page-faq .faq-cta { padding: 58px 0 88px; }
}

/* ---------- 桌面：侧栏索引常驻 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-cats { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .page-faq .faq-body__grid {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--nav-h) + 26px);
  }
  .page-faq .faq-cta__panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    padding: 48px 46px;
    align-items: start;
  }
  .page-faq .faq-cta__channels { grid-template-columns: 1fr; border-top: 0; }
  .page-faq .faq-cta__channel { justify-content: space-between; padding: 14px 0; }
  .page-faq .faq-cta__channel .footer-contact__v { text-align: right; }
  .page-faq .qa-item__body { padding-left: 38px; }
}

/* ---------- 窄屏：索引转横向胶囊 ---------- */
@media (max-width: 999px) {
  .page-faq .faq-side {
    margin: 0 calc(var(--gutter) * -1);
    padding: 0 var(--gutter) 6px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .page-faq .faq-side::-webkit-scrollbar { display: none; }
  .page-faq .faq-side .side-index__title { display: none; }
  .page-faq .faq-side ul {
    display: flex;
    gap: 8px;
    width: max-content;
  }
  .page-faq .faq-side li { flex: 0 0 auto; }
  .page-faq .faq-side .side-index__link {
    padding: 8px 15px;
    border: 1px solid var(--faq-line-ink);
    border-radius: var(--pill);
    white-space: nowrap;
    font-size: 13px;
  }
  .page-faq .faq-side .side-index__link[aria-current] {
    border-color: var(--orange-500);
    background: var(--faq-orange-wash);
  }
}

@media (max-width: 520px) {
  .page-faq .faq-hero__stat-num { font-size: 22px; }
  .page-faq .qa-item__body { padding-left: 0; padding-top: 2px; }
  .page-faq .qa-item summary { gap: 10px; font-size: 15px; }
  .page-faq .faq-cta__panel { padding: 26px 18px; }
  .page-faq .back-to-top { right: 12px; bottom: 14px; padding: 9px 13px; font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-item__body { animation: none; }
  .page-faq .faq-cat,
  .page-faq .qa-item__toggle,
  .page-faq .qa-item__toggle::before,
  .page-faq .qa-item__toggle::after,
  .page-faq .back-to-top { transition: none; }
}
<<<END>>>