.page-faq {
  position: relative;
  background: var(--bg-deep);
  color: var(--silver);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  padding: clamp(26px, 5vw, 56px) 0 clamp(24px, 4vw, 48px);
  overflow: hidden;
}

.page-faq .faq-hero__glow {
  position: absolute;
  inset: -30% -10% auto -10%;
  height: 460px;
  background:
    radial-gradient(55% 75% at 18% 45%, rgba(122, 92, 255, .22), transparent 72%),
    radial-gradient(45% 65% at 82% 18%, rgba(53, 230, 210, .14), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__text,
.page-faq .faq-hero__media {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 14px;
  font-size: .6875rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--white);
  text-shadow: 0 0 22px rgba(53, 230, 210, .18);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 54ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
}

.page-faq .faq-hero__stat b {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.page-faq .faq-hero__stat span {
  font-size: .8125rem;
  color: var(--mist);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--bg-mid);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(155deg, rgba(122, 92, 255, .18), transparent 58%);
  pointer-events: none;
}

.page-faq .media__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }
  .page-faq .faq-hero__lead {
    font-size: 1.0625rem;
  }
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-filter__label {
  margin-right: 6px;
  font-size: .6875rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .filter__btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--panel);
  color: var(--mist);
  font: inherit;
  font-size: .8125rem;
  line-height: 1;
  cursor: pointer;
  transition: color .18s ease-out, border-color .18s ease-out, background .18s ease-out;
}

.page-faq .filter__btn:hover,
.page-faq .filter__btn:focus-visible {
  color: var(--silver);
  border-color: var(--cyan-dim);
}

.page-faq .filter__btn[aria-pressed="true"] {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(53, 230, 210, .1);
}

.page-faq .filter__count {
  font-family: var(--font-mono);
  font-size: .6875rem;
  color: var(--mist);
}

.page-faq .filter__btn[aria-pressed="true"] .filter__count {
  color: var(--cyan);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 48px);
  padding: clamp(24px, 4vw, 44px) 0 clamp(48px, 8vw, 96px);
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 244px minmax(0, 1fr);
    align-items: start;
  }
}

.page-faq .faq-side {
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--bg-mid);
}

.page-faq .faq-side__label {
  margin: 0 0 12px;
  font-size: .6875rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.page-faq .faq-side__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px 9px 12px;
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: .875rem;
  line-height: 1.5;
  text-decoration: none;
  transition: color .18s ease-out, border-color .18s ease-out, background .18s ease-out;
}

.page-faq .faq-side__link:hover,
.page-faq .faq-side__link:focus-visible {
  color: var(--silver);
  border-left-color: var(--cyan);
  background: rgba(53, 230, 210, .06);
}

.page-faq .faq-side__n {
  flex: 0 0 auto;
  font-size: .75rem;
  color: var(--cyan);
}

@media (max-width: 999px) {
  .page-faq .faq-side__label {
    margin-bottom: 10px;
  }
  .page-faq .faq-side__list {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }
  .page-faq .faq-side__link {
    white-space: nowrap;
    border-left: 0;
    border-bottom: 2px solid transparent;
    padding: 8px 12px;
  }
  .page-faq .faq-side__link:hover,
  .page-faq .faq-side__link:focus-visible {
    border-left-color: transparent;
    border-bottom-color: var(--cyan);
  }
}

/* ---------- 问答主题块 ---------- */
.page-faq .faq-topic {
  padding-top: clamp(28px, 4vw, 44px);
  margin-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--bar-h) + 32px);
}

.page-faq .faq-topic:first-of-type {
  padding-top: 0;
  margin-top: 0;
  border-top: 0;
}

.page-faq .faq-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  margin-bottom: 20px;
}

.page-faq .faq-head__num {
  grid-row: 1 / span 2;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--cyan);
  opacity: .6;
}

.page-faq .faq-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.6vw, 1.65rem);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-head__desc {
  grid-column: 2;
  margin: 0;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--mist);
}

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

.page-faq .qa {
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color .18s ease-out, background .18s ease-out, box-shadow .18s ease-out;
}

.page-faq .qa:hover {
  border-color: var(--cyan-dim);
}

.page-faq .qa[open] {
  border-color: var(--cyan-dim);
  background: var(--panel-hi);
  box-shadow: inset 2px 0 0 0 var(--cyan);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 18px;
  list-style: none;
  cursor: pointer;
  color: var(--silver);
  font-size: .9375rem;
  line-height: 1.6;
}

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

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

.page-faq .qa__num {
  flex: 0 0 auto;
  min-width: 32px;
  font-size: .75rem;
  line-height: 1.9;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .qa__text {
  flex: 1 1 auto;
  font-weight: 600;
}

.page-faq .qa__sign {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 7px;
  border-right: 1.5px solid var(--mist);
  border-bottom: 1.5px solid var(--mist);
  transform: rotate(45deg);
  transition: transform .2s ease-out, border-color .18s ease-out;
}

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

.page-faq .qa__a {
  padding: 0 18px 18px 62px;
}

.page-faq .qa__a p {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: .875rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-dim);
}

.page-faq .qa__a a:hover {
  border-bottom-color: var(--cyan);
}

@media (max-width: 620px) {
  .page-faq .qa__q {
    padding: 14px;
    gap: 10px;
  }
  .page-faq .qa__a {
    padding: 0 14px 16px 14px;
  }
}

/* ---------- 周期刻度面板 ---------- */
.page-faq .cycle-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  padding: 18px;
  margin-bottom: 20px;
  border: 1px solid var(--line);
  background: var(--bg-mid);
}

@media (min-width: 760px) {
  .page-faq .cycle-panel {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
  }
}

.page-faq .cycle {
  display: grid;
  grid-template-columns: repeat(14, minmax(0, 1fr));
  gap: 4px;
  margin: 0 0 12px;
}

.page-faq .cycle__cell {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-size: .625rem;
  color: var(--mist);
}

.page-faq .cycle__cell.is-on {
  border-color: var(--cyan);
  background: rgba(53, 230, 210, .1);
  color: var(--cyan);
  box-shadow: 0 0 12px rgba(53, 230, 210, .18);
}

.page-faq .cycle-panel__note {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .cycle-panel__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

@media (max-width: 620px) {
  .page-faq .cycle {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }
  .page-faq .cycle__cell {
    height: 36px;
  }
}

/* ---------- 收尾引导 ---------- */
.page-faq .faq-topic--more {
  padding-bottom: clamp(28px, 4vw, 48px);
}

.page-faq .faq-next {
  margin-top: 22px;
  padding: 22px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: var(--bg-mid);
}

.page-faq .faq-next__text {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 筛选空态 ---------- */
.page-faq .faq-empty {
  margin: 0 0 20px;
  padding: 16px;
  border: 1px dashed var(--line);
  font-size: .875rem;
  line-height: 1.7;
  color: var(--mist);
}

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__sign,
  .page-faq .filter__btn,
  .page-faq .faq-side__link {
    transition: none;
  }
}