.page-faq {
  --faq-line: rgba(46, 107, 168, 0.28);
  --faq-line-strong: rgba(46, 107, 168, 0.5);
  --faq-card: #0B1B33;
  display: block;
}

/* ---------- 首屏框景 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(28px, 6vw, 68px));
  padding-bottom: clamp(48px, 7vw, 96px);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(46, 107, 168, 0.24), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--deep) 100%);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  align-items: center;
}

.page-faq .faq-hero__frame {
  position: relative;
  padding: clamp(24px, 4vw, 46px);
  border-radius: var(--radius-lg);
  min-width: 0;
}

.page-faq .faq-hero__stamp {
  position: absolute;
  top: 10px;
  right: 18px;
  transform: rotate(12deg);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
  background: rgba(5, 8, 15, 0.9);
  border: 1px solid rgba(255, 106, 26, 0.42);
  border-radius: var(--pill);
  padding: 4px 12px;
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .faq-hero__kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--green);
}

.page-faq .faq-hero__title {
  margin: 16px 0 20px;
  font-size: clamp(34px, 5.6vw, 64px);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--chalk);
  max-width: 18em;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 40em;
  font-size: 17px;
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-hero__meta li {
  position: relative;
  padding-left: 16px;
}

.page-faq .faq-hero__meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
}

.page-faq .faq-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-hero__figure .figure-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--faq-line);
}

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

@media (min-width: 1000px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: end;
  }
}

/* ---------- 章节轨补充 ---------- */

.page-faq .rail-txt {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

/* ---------- 筛选工具条 ---------- */

.page-faq .faq-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 28px;
  margin-top: clamp(44px, 6vw, 78px);
  padding-bottom: clamp(18px, 3vw, 30px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  min-width: 0;
}

.page-faq .filter-btn {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 10px 18px;
  border-radius: var(--pill);
  border: 1px solid var(--faq-line);
  background: transparent;
  color: var(--mist);
  cursor: pointer;
  transition: color 0.24s var(--ease), background-color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-faq .filter-btn:hover {
  color: var(--chalk);
  border-color: var(--faq-line-strong);
}

.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
  font-weight: 700;
}

.page-faq .faq-toolbar__note {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
  opacity: 0.85;
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding-top: clamp(52px, 7vw, 92px);
}

.page-faq .faq-group[data-hidden="true"] {
  display: none;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 14px 20px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-faq .faq-group__marker {
  flex: 0 0 8px;
  align-self: stretch;
  min-height: 60px;
  border-radius: var(--pill);
  background: linear-gradient(180deg, var(--green), rgba(47, 191, 113, 0.24));
}

.page-faq .faq-group__titlewrap {
  flex: 1 1 300px;
  min-width: 0;
}

.page-faq .faq-group .section-title {
  margin: 12px 0 0;
  font-size: clamp(22px, 2.7vw, 28px);
  line-height: 1.35;
  font-weight: 800;
  color: var(--chalk);
}

.page-faq .faq-group__head .section-note {
  margin: 6px 0 0 auto;
  align-self: flex-end;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  white-space: nowrap;
  font-family: var(--mono);
}

.page-faq .faq-group__body {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  min-width: 0;
}

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

@media (min-width: 1100px) {
  .page-faq .faq-group__body {
    grid-template-columns: minmax(0, 1fr) 262px;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--header-h) + 36px);
    align-self: start;
  }
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-item {
  background: var(--faq-card);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--faq-line-strong);
  transform: translateY(-2px);
}

.page-faq .faq-item[open] {
  border-color: rgba(255, 106, 26, 0.5);
  transform: none;
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 22px clamp(18px, 3vw, 26px);
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  line-height: 1.65;
  font-weight: 600;
  color: var(--chalk);
}

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

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: -4px;
}

.page-faq .faq-num {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--orange);
}

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

.page-faq .faq-chevron {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  margin-top: 8px;
  margin-left: auto;
  border-right: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-faq .faq-item[open] .faq-chevron {
  transform: rotate(225deg);
  border-color: var(--orange);
}

.page-faq .faq-a {
  padding: 0 clamp(18px, 3vw, 26px) 24px clamp(48px, 6vw, 62px);
  font-size: 16px;
  line-height: 1.9;
  color: var(--mist);
}

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

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

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

/* ---------- 旁注说明牌 ---------- */

.page-faq .faq-aside .plate {
  margin: 0;
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--faq-line);
  background: rgba(20, 51, 92, 0.42);
}

.page-faq .plate-label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
}

.page-faq .plate-body {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .plate-body a {
  color: var(--ember);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .plate-body .mono {
  font-family: var(--mono);
  color: var(--chalk);
  word-break: break-all;
}

/* ---------- 口径对照带 ---------- */

.page-faq .faq-caliber {
  margin-top: clamp(56px, 8vw, 96px);
  padding: clamp(40px, 6vw, 76px) 0;
  background:
    linear-gradient(135deg, rgba(47, 191, 113, 0.12), transparent 58%),
    var(--deep);
  border-top: 6px solid var(--green);
  border-bottom: 6px solid var(--green);
}

.page-faq .faq-caliber__inner {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  min-width: 0;
}

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

.page-faq .faq-caliber__title {
  margin: 14px 0 16px;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-faq .faq-caliber__text {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-caliber__figure {
  margin: 28px 0 0;
}

.page-faq .faq-caliber__figure .figure-media {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--faq-line);
}

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

.page-faq .caliber-list {
  margin: 0;
  padding: 0;
  list-style: none;
  min-width: 0;
}

.page-faq .caliber-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .caliber-row:first-child {
  border-top: 1px solid var(--faq-line);
}

.page-faq .caliber-key {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--yellow);
}

.page-faq .caliber-axis {
  display: none;
}

.page-faq .caliber-val {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

@media (min-width: 720px) {
  .page-faq .caliber-row {
    grid-template-columns: minmax(104px, 152px) 40px minmax(0, 1fr);
    gap: 0 14px;
    align-items: stretch;
  }

  .page-faq .caliber-axis {
    display: block;
    background-image: repeating-linear-gradient(to bottom, var(--scale-blue) 0 1px, transparent 1px 6px);
    opacity: 0.6;
  }

  .page-faq .caliber-val {
    padding-left: 10px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-caliber__inner {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    align-items: start;
  }
}

/* ---------- 收尾 ---------- */

.page-faq .faq-tail {
  padding-top: clamp(56px, 8vw, 96px);
  padding-bottom: clamp(56px, 8vw, 96px);
}

.page-faq .faq-tail__inner {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
  padding: clamp(28px, 5vw, 52px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--faq-line);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(255, 106, 26, 0.14), transparent 60%),
    var(--deep);
}

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

.page-faq .faq-tail__text .section-title {
  margin: 14px 0 16px;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.28;
  font-weight: 900;
  color: var(--chalk);
}

.page-faq .faq-tail__text p {
  margin: 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (min-width: 900px) {
  .page-faq .faq-tail__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-faq .faq-tail__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ---------- 窄屏与动效降级 ---------- */

@media (max-width: 560px) {
  .page-faq .faq-q {
    gap: 12px;
    font-size: 16px;
  }

  .page-faq .faq-a {
    padding-left: clamp(18px, 3vw, 26px);
  }

  .page-faq .faq-hero__stamp {
    top: 6px;
    right: 12px;
    font-size: 11px;
  }

  .page-faq .faq-group__head .section-note {
    margin-left: 0;
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-chevron,
  .page-faq .filter-btn {
    transition: none;
  }

  .page-faq .faq-item:hover {
    transform: none;
  }
}