.page-faq {
  --faq-radius: 14px;
  --faq-panel: rgba(12, 20, 48, 0.72);
  --faq-soft: rgba(22, 36, 77, 0.46);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(18px, 3vw, 34px) 0 clamp(30px, 5vw, 58px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: min(640px, 82vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 34% 34%, rgba(57, 255, 136, 0.15), transparent 64%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong) 20%, var(--line-strong) 80%, transparent);
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(24px, 3.6vw, 46px);
  align-items: center;
}

@media (min-width: 920px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

.page-faq .faq-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-faq .faq-hero__eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(57, 255, 136, 0.16);
}

.page-faq .faq-hero__title {
  margin: clamp(12px, 2vw, 20px) 0 0;
  font-size: clamp(30px, 5.4vw, 56px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-hero__title-accent {
  display: inline-block;
  color: var(--neon);
}

.page-faq .faq-hero__lede {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.84;
  color: var(--text);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-jump__label {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
  margin-right: 4px;
}

.page-faq .faq-jump .tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-faq .faq-jump .tag:hover,
.page-faq .faq-jump .tag:focus-visible {
  color: var(--neon);
  border-color: rgba(57, 255, 136, 0.5);
  background: var(--neon-dim);
}

.page-faq .faq-hero__fig {
  margin: 0;
  position: relative;
}

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--faq-radius) + 8px);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
}

@media (min-width: 920px) {
  .page-faq .faq-hero__fig {
    transform: rotate(-1.2deg);
  }
}

.page-faq .faq-hero__fig figcaption {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  padding-top: clamp(26px, 4vw, 48px);
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 238px minmax(0, 1fr);
    gap: clamp(32px, 4.6vw, 68px);
    align-items: start;
  }
}

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

/* ---------- 侧边索引 ---------- */
.page-faq .faq-nav__title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-faq .faq-nav__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-nav__item {
  flex: none;
}

.page-faq .faq-nav__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-left: 2px solid transparent;
  border-radius: 9px;
  font-size: 14px;
  color: var(--text-dim);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.25s var(--ease), background-color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-nav__num {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--mute);
  transition: color 0.25s var(--ease);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  color: var(--white);
  background: var(--faq-soft);
}

.page-faq .faq-nav__link[aria-current="true"] {
  color: var(--neon);
  border-left-color: var(--neon);
  background: var(--neon-dim);
}

.page-faq .faq-nav__link[aria-current="true"] .faq-nav__num {
  color: var(--neon);
}

@media (min-width: 1000px) {
  .page-faq .faq-nav {
    position: sticky;
    top: calc(var(--hdr-h) + 22px);
  }

  .page-faq .faq-nav__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
}

/* ---------- 分类章节 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--hdr-h) + 22px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(36px, 5.2vw, 64px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__idx {
  margin: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--neon);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 3vw, 29px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group__lede {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: linear-gradient(180deg, var(--faq-soft), var(--faq-panel));
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

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

.page-faq .faq-item[open] {
  border-color: rgba(57, 255, 136, 0.34);
  box-shadow: 0 0 0 1px rgba(57, 255, 136, 0.1);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.62;
  color: var(--white);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -3px;
  border-radius: var(--faq-radius);
}

.page-faq .faq-item__num {
  flex: none;
  min-width: 30px;
  padding-top: 3px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--mute);
  transition: color 0.25s var(--ease);
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--neon);
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: none;
  width: 15px;
  height: 15px;
  margin-top: 5px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  border-radius: 2px;
  background: var(--mute);
  transition: transform 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 6.5px;
  width: 15px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  left: 6.5px;
  top: 0;
  width: 2px;
  height: 15px;
}

.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--neon);
}

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

.page-faq .faq-item__a {
  padding: 0 16px 18px;
  font-size: 15px;
  line-height: 1.86;
  color: var(--text);
}

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

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

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

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

@media (min-width: 620px) {
  .page-faq .faq-item__a {
    padding-left: 58px;
  }
}

/* ---------- 中段插图 ---------- */
.page-faq .faq-figure {
  margin: clamp(30px, 4.4vw, 48px) 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--faq-radius) + 6px);
  border: 1px solid var(--line);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 底部联系 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(48px, 7vw, 88px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(22, 36, 77, 0.5), rgba(10, 17, 40, 0));
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  padding: clamp(30px, 5vw, 58px) 0 clamp(34px, 5vw, 66px);
}

@media (min-width: 880px) {
  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: center;
  }
}

.page-faq .faq-cta__title {
  margin: 0;
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-cta__text {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--text);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-cta__box {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--faq-panel);
}

.page-faq .faq-cta__key {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-faq .faq-cta__mail {
  margin: 0;
  font-family: var(--mono);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--neon);
  word-break: break-all;
}

.page-faq .faq-cta__note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--text-dim);
}

.page-faq .faq-cta__copy {
  margin-top: 16px;
}

.page-faq .faq-cta__status {
  margin: 10px 0 0;
  min-height: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--neon);
}

.page-faq .faq-cta__status:empty {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-nav__link,
  .page-faq .faq-jump .tag {
    transition: none;
  }
}