.page-faq {
  --faq-edge: rgba(19, 35, 58, .92);
  --faq-edge-soft: rgba(19, 35, 58, .55);
  --faq-glow: rgba(49, 230, 255, .16);
  --faq-panel: #0C1422;
  --faq-deep: #091020;
  padding-bottom: 10px;
}

.page-faq .breadcrumbs {
  margin: 18px 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-faq .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--muted);
}

.page-faq .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--rail);
}

.page-faq .breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
}

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

/* ---------- 首屏框景 ---------- */

.page-faq .faq-hero {
  padding: 6px 0 0;
}

.page-faq .faq-hero__frame {
  position: relative;
  display: grid;
  gap: clamp(20px, 3vw, 38px);
  padding: clamp(22px, 4vw, 46px);
  border: 1px solid var(--faq-edge);
  background:
    radial-gradient(120% 140% at 92% -10%, var(--faq-glow), transparent 58%),
    linear-gradient(155deg, var(--faq-panel) 0%, var(--ink) 74%);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(19, 35, 58, .5) 0 1px, transparent 1px 46px);
  opacity: .65;
  pointer-events: none;
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 92px;
  height: 92px;
  border-left: 1px solid var(--faq-edge);
  border-bottom: 1px solid var(--faq-edge);
  background: linear-gradient(225deg, rgba(255, 184, 77, .18), transparent 65%);
  pointer-events: none;
}

.page-faq .faq-hero__copy,
.page-faq .faq-paths {
  position: relative;
}

.page-faq .eyebrow {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq h1 {
  margin: 0 0 16px;
  font-size: clamp(27px, 5.2vw, 48px);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-paths {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-paths__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  border: 1px solid var(--faq-edge);
  border-left: 3px solid var(--amber);
  background: rgba(9, 16, 32, .82);
}

.page-faq .faq-paths__item:nth-child(2) {
  border-left-color: var(--cyan);
}

.page-faq .faq-paths__item:nth-child(3) {
  border-left-color: var(--magenta);
}

.page-faq .faq-paths__idx {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--amber);
  padding-top: 2px;
}

.page-faq .faq-paths__title {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-paths__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--muted);
}

/* ---------- 主体布局 ---------- */

.page-faq .faq-body {
  padding: clamp(32px, 5vw, 62px) 0 10px;
}

.page-faq .faq-layout {
  display: grid;
  gap: 26px;
}

.page-faq .faq-side {
  border: 1px solid var(--faq-edge);
  border-top: 3px solid var(--cyan);
  background: var(--faq-deep);
  padding: 18px 16px;
  box-shadow: var(--shadow-lg);
}

.page-faq .faq-side__head {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--amber);
  text-transform: uppercase;
}

.page-faq .faq-side__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-side__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 8px;
  font-size: 14px;
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-edge-soft);
  transition: background .18s ease, color .18s ease;
}

.page-faq .faq-side__list a:hover,
.page-faq .faq-side__list a:focus-visible {
  background: rgba(49, 230, 255, .09);
  color: var(--cyan);
}

.page-faq .faq-side__num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}

.page-faq .faq-side__cta {
  border-top: 1px dashed var(--faq-edge);
  padding-top: 14px;
}

.page-faq .faq-side__cta-title {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-side__cta-note {
  margin: 0 0 12px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--muted);
}

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

/* ---------- 筛选 ---------- */

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--faq-edge-soft);
}

.page-faq .filter-btn {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  padding: 8px 13px;
  background: var(--faq-panel);
  color: var(--muted);
  border: 1px solid var(--faq-edge);
  cursor: pointer;
  clip-path: var(--cut);
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}

.page-faq .filter-btn:hover,
.page-faq .filter-btn:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
  outline: none;
}

.page-faq .filter-btn[aria-pressed="true"],
.page-faq .filter-btn.is-active {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04121A;
}

/* ---------- 问答分组 ---------- */

.page-faq .faq-group {
  margin-top: 40px;
  scroll-margin-top: 96px;
}

.page-faq .faq-group:first-of-type {
  margin-top: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 10px;
}

.page-faq .faq-group__idx {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--amber);
  border: 1px solid var(--faq-edge);
  padding: 3px 7px;
  background: var(--faq-panel);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.3;
  color: var(--white);
}

.page-faq .faq-group__lede {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
  max-width: 62ch;
}

.page-faq .faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--faq-edge);
  background: var(--faq-panel);
  box-shadow: var(--shadow-lg);
  transition: border-color .2s ease;
}

.page-faq .faq-item[open] {
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-item[hidden] {
  display: none;
}

.page-faq .faq-item summary {
  position: relative;
  padding: 15px 46px 15px 16px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] summary::after {
  content: "–";
  color: var(--amber);
}

.page-faq .faq-item summary:hover {
  color: var(--cyan);
}

.page-faq .faq-answer {
  padding: 0 16px 16px;
  border-top: 1px dashed var(--faq-edge-soft);
  margin-top: 2px;
  padding-top: 12px;
}

.page-faq .faq-answer p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-answer a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(49, 230, 255, .45);
}

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

/* ---------- 插图 ---------- */

.page-faq .faq-figure {
  margin: 21px 0 0;
  border: 1px solid var(--faq-edge);
  background: var(--faq-deep);
  padding: 10px;
  box-shadow: var(--shadow-lg);
}

.page-faq .faq-figure .media-frame {
  overflow: hidden;
  background: #06101d;
}

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

.page-faq .media-frame__caption {
  margin: 10px 2px 2px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 联系卡 ---------- */

.page-faq .faq-contact {
  margin-top: 20px;
  padding: 20px 18px;
  border: 1px solid var(--faq-edge);
  border-left: 3px solid var(--amber);
  background:
    linear-gradient(135deg, rgba(255, 184, 77, .1), transparent 62%),
    var(--faq-panel);
  box-shadow: var(--shadow-lg);
}

.page-faq .faq-contact__label {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--amber);
}

.page-faq .faq-contact__value {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: clamp(13px, 2.6vw, 17px);
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .faq-contact__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .faq-contact__note a {
  color: var(--white);
  border-bottom: 1px solid var(--faq-edge);
  text-decoration: none;
}

.page-faq .faq-contact__note a:hover,
.page-faq .faq-contact__note a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-side__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-figure {
    padding: 12px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__frame {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: start;
  }

  .page-faq .faq-layout {
    grid-template-columns: 252px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-side__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-group {
    margin-top: 48px;
  }
}