.page-faq {
  --faq-idx-w: 232px;
  --faq-paper-line: #ddd0b8;
  --faq-ink-text: #201a13;
  --faq-ink-soft: #4a4136;
  background-color: var(--ink-deep);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(40px, 7vw, 92px) 0 clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--grid);
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(to right, rgba(34, 51, 77, .58) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34, 51, 77, .58) 1px, transparent 1px);
  background-size: 86px 86px;
  -webkit-mask-image: radial-gradient(ellipse 92% 76% at 72% 6%, #000 0%, transparent 72%);
  mask-image: radial-gradient(ellipse 92% 76% at 72% 6%, #000 0%, transparent 72%);
  pointer-events: none;
}

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

.page-faq .faq-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 6vw, 4.4rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--paper-bone);
  max-width: 15em;
}

.page-faq .faq-hero__row {
  margin-top: clamp(22px, 3.4vw, 40px);
  align-items: start;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(1rem, 1.25vw, 1.1rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero__panel {
  padding: 20px 22px 22px;
  margin: 0;
}

.page-faq .faq-hero__panel-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: #8a7d68;
}

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

.page-faq .fact + .fact {
  margin-top: 13px;
  padding-top: 13px;
  border-top: 1px solid var(--faq-paper-line);
}

.page-faq .fact__v {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--ink-deep);
  line-height: 1.2;
}

.page-faq .fact__k {
  display: block;
  margin-top: 5px;
  font-size: .78rem;
  line-height: 1.55;
  color: #6c6152;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-shell {
  padding: clamp(34px, 5vw, 72px) 0 clamp(56px, 8vw, 108px);
}

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

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    display: grid;
    grid-template-columns: var(--faq-idx-w) minmax(0, 1fr);
    gap: clamp(34px, 5vw, 80px);
    align-items: start;
  }
}

/* ---------- 锚点索引 ---------- */
.page-faq .idx {
  margin: 0 0 32px;
}

.page-faq .idx__head {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .idx__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
}

.page-faq .idx__list li {
  flex: 0 0 auto;
}

.page-faq .idx__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 15px;
  border: 1px solid var(--grid);
  background: rgba(5, 10, 18, .5);
  color: var(--mist);
  text-decoration: none;
  font-size: .86rem;
  line-height: 1.4;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .idx__num {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--gold);
  transition: color .2s var(--ease);
}

.page-faq .idx__link:hover,
.page-faq .idx__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(47, 227, 181, .07);
}

.page-faq .idx__link[data-active="true"] {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .idx__link[data-active="true"] .idx__num {
  color: var(--cyan);
}

.page-faq .idx__note {
  margin: 12px 0 0;
  font-size: .74rem;
  line-height: 1.7;
  color: var(--mist);
  opacity: .72;
}

@media (min-width: 1024px) {
  .page-faq .idx {
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
    margin-bottom: 0;
    padding-left: 18px;
    border-left: 2px solid var(--grid);
  }

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

  .page-faq .idx__link {
    border: 0;
    border-bottom: 1px solid rgba(34, 51, 77, .75);
    background: transparent;
    padding: 12px 4px 12px 0;
    white-space: normal;
  }

  .page-faq .idx__link:hover,
  .page-faq .idx__link:focus-visible,
  .page-faq .idx__link[data-active="true"] {
    background: transparent;
  }
}

/* ---------- 章节 ---------- */
.page-faq [data-section] {
  scroll-margin-top: calc(var(--topbar-h) + 28px);
}

.page-faq .qa-block {
  margin-bottom: clamp(44px, 6vw, 82px);
}

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

.page-faq .block-head {
  display: flex;
  align-items: baseline;
  gap: 15px;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--grid);
}

.page-faq .block-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-faq .block-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.28rem, 2.5vw, 1.82rem);
  letter-spacing: .02em;
  line-height: 1.35;
  color: var(--paper-bone);
}

/* ---------- 三步 ---------- */
.page-faq .steps {
  margin: 0;
}

.page-faq .step {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid rgba(34, 51, 77, .8);
}

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

.page-faq .step:last-child {
  border-bottom: 0;
}

.page-faq .step__num {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1;
  color: var(--gold);
  padding-top: 3px;
}

.page-faq .step__title {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: .01em;
  color: var(--paper-bone);
}

.page-faq .step__text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .qa-list {
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  border: 1px solid var(--grid);
  background: var(--ink-night);
  transition: border-color .25s var(--ease);
}

.page-faq .qa[open] {
  border-color: rgba(232, 180, 87, .7);
}

.page-faq .qa__q {
  position: relative;
  display: block;
  margin: 0;
  padding: 17px 52px 17px 20px;
  cursor: pointer;
  list-style: none;
  font-size: .97rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color .2s var(--ease);
}

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

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

.page-faq .qa__q::after {
  content: "";
  position: absolute;
  right: 22px;
  top: calc(50% - 6px);
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--gold);
  border-bottom: 2px solid var(--gold);
  transform: rotate(45deg);
  transition: transform .25s var(--ease), top .25s var(--ease), border-color .2s var(--ease);
}

.page-faq .qa[open] .qa__q::after {
  top: calc(50% - 2px);
  transform: rotate(-135deg);
}

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

.page-faq .qa__q:hover::after,
.page-faq .qa__q:focus-visible::after {
  border-color: var(--cyan);
}

.page-faq .qa__a {
  padding: 18px 22px 20px;
  border-top: 1px solid var(--grid);
  background: var(--paper);
  color: var(--faq-ink-text);
  font-size: .93rem;
  line-height: 1.85;
}

.page-faq .qa[open] .qa__a {
  animation: faqFade .26s var(--ease);
}

@keyframes faqFade {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: none; }
}

.page-faq .qa__a p {
  margin: 0 0 1em;
}

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

.page-faq .qa__a a {
  color: #0d5d4a;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .block-tail {
  margin: 22px 0 0;
  font-size: .84rem;
  line-height: 1.8;
  color: var(--mist);
  opacity: .82;
}

.page-faq .block-tail a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 图 ---------- */
.page-faq .figure {
  margin: clamp(26px, 4vw, 42px) 0 0;
}

.page-faq .figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .figure__cap {
  margin: 10px 0 0;
  font-size: .76rem;
  line-height: 1.65;
  color: var(--mist);
  opacity: .78;
}

/* ---------- 人工支持 ---------- */
.page-faq .support {
  padding: clamp(24px, 4vw, 40px);
  background: var(--paper);
  border: 1px solid var(--faq-paper-line);
  box-shadow: 8px 8px 0 rgba(5, 10, 18, .6);
  color: var(--faq-ink-text);
}

.page-faq .support__lead {
  margin: 0;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

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

.page-faq .chan__item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 15px 0;
  border-top: 1px solid var(--faq-paper-line);
}

.page-faq .chan__item:last-child {
  border-bottom: 1px solid var(--faq-paper-line);
}

.page-faq .chan__k {
  flex: 0 0 100%;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: #8a7d68;
}

.page-faq .chan__v {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.5;
  color: var(--ink-deep);
  word-break: break-word;
  min-width: 0;
}

.page-faq .support__note {
  margin: 18px 0 0;
  font-size: .8rem;
  line-height: 1.8;
  color: #6c6152;
}

.page-faq .support__note a {
  color: #0d5d4a;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 900px) {
  .page-faq .faq-hero__panel {
    margin-top: 26px;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-hero::before {
    background-size: 62px 62px;
  }

  .page-faq .step {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
    padding: 18px 0;
  }

  .page-faq .step__num {
    font-size: 1.15rem;
  }

  .page-faq .step__title {
    font-size: .96rem;
  }

  .page-faq .qa__q {
    padding: 15px 44px 15px 15px;
    font-size: .92rem;
  }

  .page-faq .qa__q::after {
    right: 18px;
  }

  .page-faq .qa__a {
    padding: 15px 16px 17px;
    font-size: .88rem;
  }

  .page-faq .block-head {
    gap: 10px;
  }

  .page-faq .support {
    box-shadow: 5px 5px 0 rgba(5, 10, 18, .6);
  }
}