.page-faq {
  background: var(--ink);
  color: var(--fg);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-faq img {
  max-width: 100%;
}

/* ---------- 首屏 ---------- */

.page-faq .hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(28px, 6vw, 76px));
  padding-bottom: clamp(28px, 5vw, 54px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .hero::after {
  content: "";
  position: absolute;
  top: -160px;
  right: -140px;
  width: min(58vw, 640px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184, 255, 60, 0.16) 0%, rgba(184, 255, 60, 0) 68%);
  pointer-events: none;
}

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

.page-faq .hero .breadcrumb {
  margin-bottom: clamp(18px, 3.6vw, 34px);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--fg-dim);
}

.page-faq .hero .breadcrumb__item {
  color: var(--fg-dim);
  text-decoration: none;
}

.page-faq .hero .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin: 0 9px;
  color: var(--line);
}

.page-faq .hero .breadcrumb__item:first-child:hover {
  color: var(--lime);
}

.page-faq .hero .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .hero h1 {
  margin: 0 0 18px;
  max-width: 20ch;
  font-size: clamp(29px, 6.2vw, 56px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-faq .hero .lede {
  margin: 0 0 clamp(24px, 4vw, 38px);
  max-width: 38em;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.8;
  color: var(--fg-dim);
}

.page-faq .hero__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

.page-faq .hero__media img {
  display: block;
  width: 100%;
  height: clamp(148px, 26vw, 296px);
  object-fit: cover;
  filter: saturate(0.7) contrast(1.08) brightness(0.88);
}

/* ---------- 主题标签条 ---------- */

.page-faq .topic-chips {
  position: sticky;
  top: var(--header-h);
  z-index: 20;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px var(--pad);
  background: rgba(6, 8, 11, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
}

.page-faq .topic-chips::-webkit-scrollbar {
  display: none;
}

.page-faq .topic-chips .chip {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  color: var(--fg-dim);
  font-size: 14px;
  text-decoration: none;
  transition: color 240ms var(--ease), border-color 240ms var(--ease),
    background-color 240ms var(--ease);
}

.page-faq .topic-chips .chip:hover,
.page-faq .topic-chips .chip:focus-visible {
  color: var(--fg);
  border-color: var(--lime-deep);
}

.page-faq .topic-chips .chip.is-current {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 问答分组 ---------- */

.page-faq .qa-group {
  padding: clamp(38px, 6.4vw, 80px) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 74px);
}

.page-faq .qa-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 14px;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .qa-group__num {
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.5vw, 16px);
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-faq .qa-group__head .h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(21px, 3.2vw, 30px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-faq .qa-group__desc {
  grid-column: 2;
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--fg-dim);
}

.page-faq .qa-group__body {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}

@media (min-width: 940px) {
  .page-faq .qa-group--split .qa-group__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 336px);
    align-items: start;
  }
}

.page-faq .qa-group--split .media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

.page-faq .qa-group--split .media img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(0.85);
}

.page-faq .media__cap {
  margin: 0;
  padding: 11px 13px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.65;
  color: var(--fg-dim);
}

/* ---------- 折叠问答条目 ---------- */

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

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

.page-faq .qa__head {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 8px;
  padding: 15px 4px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .qa__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fg-dim);
  transition: color 240ms var(--ease);
}

.page-faq .qa__q {
  display: block;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--fg);
  transition: color 240ms var(--ease);
}

.page-faq .qa__mark {
  justify-self: end;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--fg-dim);
  border-bottom: 1.5px solid var(--fg-dim);
  transform: rotate(45deg);
  transition: transform 240ms var(--ease), border-color 240ms var(--ease);
}

.page-faq .qa__head:hover .qa__q,
.page-faq .qa__head:hover .qa__index {
  color: var(--lime);
}

.page-faq .qa[open] .qa__mark {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-faq .qa[open] .qa__index {
  color: var(--lime-deep);
}

.page-faq .qa__body {
  padding: 0 4px 18px 42px;
}

.page-faq .qa__body p {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg-dim);
}

@media (min-width: 720px) {
  .page-faq .qa__head {
    grid-template-columns: 52px minmax(0, 1fr) 24px;
    gap: 12px;
    padding: 18px 6px;
  }

  .page-faq .qa__q {
    font-size: 17px;
  }

  .page-faq .qa__body {
    padding: 0 6px 24px 70px;
  }
}

/* ---------- 旧版索引 ---------- */

.page-faq .legacy {
  padding: clamp(38px, 6.4vw, 80px) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 74px);
}

.page-faq .legacy__list {
  margin-top: clamp(16px, 2.8vw, 28px);
  border-top: 1px solid var(--line);
}

.page-faq .legacy__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 6px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  transition: background-color 240ms var(--ease);
}

.page-faq .legacy__old {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--fg-dim);
  transition: color 240ms var(--ease);
}

.page-faq .legacy__arrow {
  display: none;
  font-family: var(--font-mono);
  color: var(--line);
  transition: color 240ms var(--ease);
}

.page-faq .legacy__new {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--fg);
  transition: color 240ms var(--ease);
}

.page-faq .legacy__row:hover .legacy__old,
.page-faq .legacy__row:hover .legacy__new,
.page-faq .legacy__row:focus-visible .legacy__old,
.page-faq .legacy__row:focus-visible .legacy__new {
  color: var(--lime);
}

.page-faq .legacy__row:hover .legacy__arrow,
.page-faq .legacy__row:focus-visible .legacy__arrow {
  color: var(--lime);
}

@media (min-width: 720px) {
  .page-faq .legacy__row {
    grid-template-columns: minmax(0, 1fr) 40px minmax(0, 1fr);
    align-items: center;
    gap: 16px;
    padding: 16px 8px;
  }

  .page-faq .legacy__arrow {
    display: block;
    text-align: center;
  }
}

/* ---------- 底部客服横条 ---------- */

.page-faq .help-strip {
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink-3) 100%);
  border-bottom: 1px solid var(--line);
  padding: clamp(34px, 6vw, 64px) 0;
}

.page-faq .help-strip .container {
  transition: transform 420ms var(--ease);
}

.page-faq .help-strip.is-visible .container {
  transform: translateY(-6px);
}

.page-faq .help-strip__inner {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

@media (min-width: 860px) {
  .page-faq .help-strip__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: center;
  }
}

.page-faq .help-strip__title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-faq .help-strip__text {
  margin: 0 0 18px;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg-dim);
}

.page-faq .help-strip__list {
  display: grid;
  gap: 8px;
}

.page-faq .help-strip__item {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--fg);
}

.page-faq .help-strip__key {
  min-width: 46px;
  color: var(--lime);
}

.page-faq .help-strip__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 860px) {
  .page-faq .help-strip__actions {
    justify-content: flex-end;
  }
}