.page-faq {
  --faq-read: 40rem;
  --faq-radius-a: 2px;
  --faq-radius-b: 26px;
  display: block;
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding: 18px 0 34px;
  border-bottom: 1px solid var(--rule);
}

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

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 5.2vw, 2.9rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 8px 0 16px;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  max-width: var(--faq-read);
  color: var(--mute);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0 0 20px;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--rule);
  border-radius: var(--faq-radius-a) 48px var(--faq-radius-a) 48px;
  overflow: hidden;
  background: var(--ink-2);
}

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

/* ---------- 三步上手 ---------- */
.page-faq .faq-start {
  background: var(--ink-2);
  border-bottom: 1px solid var(--rule);
  padding: 38px 0 42px;
}

.page-faq .faq-start__intro {
  color: var(--mute);
  font-size: 0.94rem;
  line-height: 1.75;
  margin: 0;
  max-width: var(--faq-read);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-step {
  position: relative;
  padding: 20px 20px 20px;
  background: var(--ink-3);
  border-radius: var(--faq-radius-a) 22px var(--faq-radius-a) 22px;
  border-top: 2px solid var(--cyan);
}

.page-faq .faq-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-faq .faq-step h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-faq .faq-step p {
  margin: 0;
  color: var(--mute);
  font-size: 0.92rem;
  line-height: 1.72;
}

/* ---------- 主体：问答 + 粘性索引 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding: 38px 0 54px;
}

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

.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 22px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--rule);
}

.page-faq .filter-btn {
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--mute);
  cursor: pointer;
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease),
    background-color var(--speed) var(--ease);
}

.page-faq .filter-btn:hover {
  color: var(--cyan);
  border-color: var(--cyan-deep);
}

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

.page-faq .faq-list {
  padding-top: 30px;
}

.page-faq .faq-group {
  margin-bottom: 44px;
}

.page-faq .faq-group:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  margin-bottom: 8px;
}

.page-faq .faq-group__head h2 {
  font-family: var(--font-display);
  font-size: 1.32rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin: 0 0 8px;
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
  color: var(--paper);
}

.page-faq .faq-group__head p {
  margin: 0 0 18px;
  padding-left: 17px;
  color: var(--mute);
  font-size: 0.9rem;
  line-height: 1.7;
}

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

.page-faq .faq-q {
  list-style: none;
  position: relative;
  cursor: pointer;
  display: block;
  padding: 15px 34px 15px 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--paper);
  transition: color var(--speed) var(--ease);
}

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

.page-faq .faq-q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  background: var(--rule);
  transition: background-color var(--speed) var(--ease);
}

.page-faq .faq-q::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-q::before {
  background: var(--cyan);
}

.page-faq .faq-item[open] .faq-q::after {
  content: "\2212";
}

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

.page-faq .faq-a {
  padding: 0 30px 18px 16px;
  max-width: var(--faq-read);
  color: var(--mute);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-faq .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--lime);
  padding: 0 2px;
}

/* ---------- 手机端配图 ---------- */
.page-faq .faq-mobile-figure {
  margin: 26px 0 0;
  max-width: 100%;
}

.page-faq .faq-mobile-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--faq-radius-a) 20px var(--faq-radius-a) 20px;
  border: 1px solid var(--rule);
}

.page-faq .faq-mobile-figure figcaption {
  margin-top: 10px;
  color: var(--mute);
  font-size: 0.86rem;
  line-height: 1.7;
}

/* ---------- 粘性索引 ---------- */
.page-faq .faq-index {
  display: none;
}

.page-faq .faq-index__title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0 0 14px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__list a {
  position: relative;
  display: block;
  padding: 7px 0 7px 18px;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--mute);
  text-decoration: none;
  transition: color var(--speed) var(--ease);
}

.page-faq .faq-index__list a::before {
  content: "";
  position: absolute;
  left: -15px;
  top: 50%;
  width: 8px;
  height: 2px;
  background: var(--rule);
  transform: translateY(-50%);
  transition: background-color var(--speed) var(--ease), width var(--speed) var(--ease);
}

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

.page-faq .faq-index__list a:hover::before {
  background: var(--cyan);
  width: 13px;
}

.page-faq .faq-index__foot {
  margin: 0;
  color: var(--mist);
  font-size: 0.8rem;
  line-height: 1.65;
}

/* ---------- 还没解决 ---------- */
.page-faq .faq-support {
  background: var(--ink-2);
  border-top: 1px solid var(--rule);
  padding: 42px 0 54px;
}

.page-faq .faq-support__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-faq .faq-support__copy h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.4vw, 1.8rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 6px 0 14px;
  color: var(--paper);
}

.page-faq .faq-support__copy p {
  max-width: var(--faq-read);
  color: var(--mute);
  font-size: 0.95rem;
  line-height: 1.8;
  margin: 0 0 22px;
}

.page-faq .faq-support__panel {
  background: var(--ink-3);
  border-left: 3px solid var(--cyan);
  border-radius: var(--faq-radius-a) var(--faq-radius-b) var(--faq-radius-a) var(--faq-radius-b);
  padding: 22px 24px;
}

.page-faq .faq-support__row {
  display: grid;
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-support__row:last-child {
  border-bottom: 0;
  padding-bottom: 4px;
}

.page-faq .faq-support__row:first-child {
  padding-top: 4px;
}

.page-faq .faq-support__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-support__value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--paper);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-mobile-figure {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 22px;
    align-items: center;
    background: var(--ink-2);
    border-radius: var(--faq-radius-a) 28px var(--faq-radius-a) 28px;
    padding: 18px 20px;
    max-width: 100%;
  }

  .page-faq .faq-mobile-figure figcaption {
    margin-top: 0;
  }
}

@media (min-width: 780px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-hero {
    padding: 30px 0 46px;
  }

  .page-faq .faq-start {
    padding: 46px 0 50px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr) 350px;
    gap: 54px;
    align-items: center;
  }

  .page-faq .faq-support__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 252px;
    column-gap: 64px;
    padding: 44px 0 64px;
  }

  .page-faq .faq-index {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    border-left: 1px solid var(--rule);
    padding-left: 24px;
  }

  .page-faq .faq-filter-sticky {
    position: sticky;
    top: var(--header-h);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q,
  .page-faq .faq-q::before,
  .page-faq .filter-btn,
  .page-faq .faq-index__list a,
  .page-faq .faq-index__list a::before {
    transition: none;
  }
}