.page-faq {
  --faq-hang: 34px;
  --faq-indent: 34px;
  background: var(--pitch-900);
  color: var(--text);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-block: 20px 6px;
  font-size: 13px;
  color: var(--text-mute);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(22px, 4vw, 46px) clamp(44px, 6vw, 84px);
}

.page-faq .faq-hero__glow {
  position: absolute;
  top: -38%;
  right: -26%;
  width: 96%;
  height: 150%;
  pointer-events: none;
  transform: skewY(-9deg);
  background:
    radial-gradient(58% 58% at 68% 32%, rgba(59, 240, 196, 0.17), transparent 70%),
    radial-gradient(52% 52% at 18% 82%, rgba(18, 51, 38, 0.85), transparent 74%);
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(28px, 4vw, 50px);
  align-items: center;
}

.page-faq .faq-hero__copy {
  max-width: 62ch;
}

.page-faq .faq-hero__copy .display {
  margin: 14px 0 0;
}

.page-faq .faq-hero__copy .lede {
  margin: 18px 0 0;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 3.4vw, 40px);
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .faq-hero__lab {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--text-mute);
}

.page-faq .faq-hero__media {
  margin: 0;
}

.page-faq .faq-hero__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 5;
  object-fit: cover;
}

/* ---------- 高频问题双卡 ---------- */
.page-faq .faq-quick-section {
  padding-top: 0;
}

.page-faq .faq-quick__head {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-quick__head .display {
  margin: 12px 0 0;
}

.page-faq .faq-quick__grid {
  display: grid;
  gap: var(--gap);
}

.page-faq .faq-quick {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(22px, 3vw, 34px);
  background: var(--pitch-800);
  border: 1px solid var(--line);
}

.page-faq .faq-quick::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(59, 240, 196, 0));
}

.page-faq .faq-quick__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-soft);
}

.page-faq .faq-quick__q {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--warm);
}

.page-faq .faq-quick__a {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-quick__link {
  margin-top: auto;
  align-self: flex-start;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(30px, 4vw, 54px);
  padding-bottom: var(--section-y);
}

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

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 104px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(46px, 6vw, 84px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(14px, 2vw, 22px);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__index {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.2vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--pitch-700);
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-faq .faq-group__index {
    color: transparent;
    -webkit-text-stroke: 1px var(--line);
  }
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.3;
}

.page-faq .faq-group__note {
  margin: 9px 0 0;
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-mute);
}

/* ---------- 可展开条目 ---------- */
.page-faq .faq-list {
  margin-top: 4px;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-item:has(.disclosure__trigger[aria-expanded="true"]) {
  border-bottom-color: rgba(59, 240, 196, 0.5);
}

.page-faq .faq-item__trigger {
  display: grid;
  grid-template-columns: var(--faq-hang) minmax(0, 1fr) auto;
  align-items: start;
  gap: clamp(12px, 1.8vw, 20px);
  width: 100%;
  padding: clamp(18px, 2.4vw, 24px) 0;
  background: none;
  border: 0;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item__trigger:hover {
  color: var(--cyan-soft);
}

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

.page-faq .faq-item__no {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-item__q {
  font-family: var(--font-sans);
  font-size: clamp(15.5px, 1.5vw, 17.5px);
  font-weight: 600;
  line-height: 1.65;
  color: inherit;
}

.page-faq .faq-item .disclosure__icon {
  position: relative;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  flex: none;
  border: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item .disclosure__icon::before,
.page-faq .faq-item .disclosure__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan-soft);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-item .disclosure__icon::before {
  left: 5px;
  right: 5px;
  top: 10px;
  height: 1px;
}

.page-faq .faq-item .disclosure__icon::after {
  top: 5px;
  bottom: 5px;
  left: 10px;
  width: 1px;
}

.page-faq .faq-item__trigger[aria-expanded="true"] .disclosure__icon {
  border-color: var(--cyan);
  background: rgba(59, 240, 196, 0.08);
}

.page-faq .faq-item__trigger[aria-expanded="true"] .disclosure__icon::after {
  transform: scaleY(0);
}

.page-faq .faq-item .disclosure__panel {
  overflow: hidden;
  transition: height var(--dur) var(--ease);
}

.page-faq .faq-item .disclosure__inner {
  box-sizing: border-box;
  max-width: 66ch;
  padding: 0 0 clamp(18px, 2.4vw, 26px);
}

.page-faq .faq-item .disclosure__inner p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--text-dim);
}

.page-faq .faq-item .disclosure__inner p + p {
  margin-top: 10px;
}

/* ---------- 勘误说明区 ---------- */
.page-faq .faq-correction__lead {
  display: grid;
  gap: var(--gap);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-correction__media {
  margin: 0;
}

.page-faq .faq-correction__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-fields {
  padding: clamp(20px, 3vw, 28px);
  background: var(--pitch-800);
  border: 1px solid var(--line);
}

.page-faq .faq-fields__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

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

.page-faq .faq-fields__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-faq .faq-fields__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--cyan-soft);
}

/* ---------- 联络卡片 ---------- */
.page-faq .faq-contact-card {
  margin-top: clamp(20px, 3vw, 30px);
  padding: clamp(24px, 3.4vw, 42px);
  background:
    linear-gradient(152deg, rgba(59, 240, 196, 0.10), rgba(12, 36, 24, 0) 58%),
    var(--pitch-800);
  border: 1px solid var(--line);
}

.page-faq .faq-contact-card__text {
  margin: 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--text-dim);
}

.page-faq .faq-contact-card__list {
  margin: clamp(18px, 2.6vw, 28px) 0;
}

.page-faq .faq-contact-card__list > div {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact-card__list > div:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact-card__list dt {
  flex: none;
  min-width: 78px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-mute);
}

.page-faq .faq-contact-card__list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--warm);
}

.page-faq .faq-contact-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 右侧分组指示线 ---------- */
.page-faq .faq-rail {
  display: none;
}

/* ---------- 小屏与桌面 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-quick__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-correction__lead {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-faq .faq-item .disclosure__inner {
    padding-left: calc(var(--faq-hang) + clamp(12px, 1.8vw, 20px));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: clamp(30px, 4vw, 56px);
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 196px;
    gap: clamp(36px, 5vw, 76px);
    align-items: start;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: 112px;
  }
}

.page-faq .faq-rail__label {
  margin: 0 0 14px;
  font-size: 11.5px;
  color: var(--text-mute);
}

.page-faq .faq-rail__list {
  position: relative;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-faq .faq-rail__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--line);
}

.page-faq .faq-rail__item {
  position: relative;
  padding-block: 7px;
}

.page-faq .faq-rail__item::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -4.5px;
  box-sizing: border-box;
  border: 1px solid var(--line);
  background: var(--pitch-900);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-rail__item:hover::before {
  background: var(--cyan);
  border-color: var(--cyan);
  transform: scale(1.2);
}

.page-faq .faq-rail__link {
  display: inline-block;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--text-mute);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

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

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: 1ms !important;
  }
}