.page-faq {
  --faq-index-w: 264px;
  --faq-gap: 40px;
  padding-bottom: clamp(56px, 9vw, 104px);
}

.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: 26px;
  padding: clamp(24px, 5vw, 54px) 0 clamp(30px, 5vw, 56px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30px -18px auto -18px;
  height: 330px;
  background:
    radial-gradient(58% 100% at 18% 0%, rgba(123, 92, 255, .24), transparent 72%),
    radial-gradient(48% 88% at 86% 8%, rgba(47, 224, 208, .13), transparent 74%);
  pointer-events: none;
  z-index: 0;
}

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

.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.07;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-faq .faq-hero .lede {
  margin: 0 0 22px;
  color: var(--mist);
  font-size: clamp(16px, 2.1vw, 18px);
  line-height: 1.78;
  max-width: 34em;
}

.page-faq .faq-hero__actions {
  gap: 12px;
}

.page-faq .faq-hero__media {
  margin: 0;
  position: relative;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  overflow: hidden;
  background: linear-gradient(160deg, var(--nebula), var(--void));
  box-shadow: var(--shadow-float);
}

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

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.3fr) minmax(240px, .7fr);
    align-items: start;
    gap: clamp(36px, 5vw, 60px);
  }
  .page-faq .faq-hero__media img {
    aspect-ratio: 3 / 4;
  }
}

/* ---------- 主布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
    gap: clamp(34px, 5vw, 66px);
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 26px);
  }
}

/* ---------- 问题索引 ---------- */
.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--dust);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 11px 10px 11px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: var(--mist);
  transition: color .22s var(--ease), padding-left .22s var(--ease), background .22s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan);
  padding-left: 8px;
  background: rgba(123, 92, 255, .1);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--neon);
  letter-spacing: .04em;
}

.page-faq .faq-index__label {
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.58;
}

.page-faq .faq-index__foot {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--dust);
}

.page-faq .faq-index__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 224, 208, .45);
}

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

/* ---------- 答案流 ---------- */
.page-faq .faq-block {
  padding: clamp(28px, 5vw, 52px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 88px;
}

.page-faq .faq-stream > .faq-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-block__label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-faq .faq-block__label::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--cyan);
  flex: none;
}

.page-faq .faq-block h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.7vw, 32px);
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-block__desc {
  margin: 0 0 24px;
  max-width: 38em;
  color: var(--dust);
  font-size: 16px;
  line-height: 1.78;
}

/* ---------- 步骤卡 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 14px;
}

@media (min-width: 760px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .faq-step {
  position: relative;
  padding: 22px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(22, 50, 74, .58), rgba(14, 24, 48, .78));
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-faq .faq-step:hover {
  transform: translateY(-4px);
  border-color: rgba(47, 224, 208, .5);
  box-shadow: var(--shadow-float);
}

.page-faq .faq-step__num {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--neon);
}

.page-faq .faq-step:nth-child(2) .faq-step__num { color: var(--cyan); }
.page-faq .faq-step:nth-child(3) .faq-step__num { color: var(--yellow); }

.page-faq .faq-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-step p {
  margin: 0;
  color: var(--dust);
  font-size: 15px;
  line-height: 1.74;
}

/* ---------- 要点列表 ---------- */
.page-faq .faq-notes {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-notes li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.76;
}

.page-faq .faq-notes li::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 10px;
  border-radius: 2px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-faq .faq-notes strong {
  color: var(--paper);
  font-weight: 600;
}

/* ---------- 纸感说明牌 ---------- */
.page-faq .faq-board {
  margin: 0;
  padding: 20px 18px 22px;
  border: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 7px 7px 0 rgba(123, 92, 255, .3);
}

.page-faq .faq-board__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-faq .faq-board p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: #2f323b;
}

/* ---------- 指标卡 ---------- */
.page-faq .faq-metrics {
  display: grid;
  gap: 14px;
}

@media (min-width: 820px) {
  .page-faq .faq-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .faq-metric {
  position: relative;
  padding: 22px 18px 22px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(22, 50, 74, .5), rgba(5, 7, 15, .68));
  overflow: hidden;
}

.page-faq .faq-metric::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--neon), var(--cyan));
}

.page-faq .faq-metric__value {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-faq .faq-metric__value span {
  margin-left: 6px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--dust);
}

.page-faq .faq-metric h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-metric p:last-child {
  margin: 0;
  color: var(--dust);
  font-size: 15px;
  line-height: 1.74;
}

/* ---------- 小结标签 ---------- */
.page-faq .faq-summary {
  display: block;
  margin: 22px 0 0;
  padding: 10px 16px;
  border: 1px dashed rgba(47, 224, 208, .5);
  border-radius: 999px;
  background: rgba(47, 224, 208, .07);
  color: var(--cyan);
  font-size: 13.5px;
  line-height: 1.6;
}

/* ---------- 导出栏 ---------- */
.page-faq .faq-export-media {
  margin: 0 0 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(150deg, var(--nebula), var(--void));
}

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

.page-faq .faq-qas {
  display: grid;
}

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

.page-faq .faq-qa summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.6;
  color: var(--paper);
  transition: color .22s var(--ease);
}

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

.page-faq .faq-qa summary::before {
  content: "+";
  flex: none;
  width: 18px;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.55;
  color: var(--neon);
}

.page-faq .faq-qa[open] summary::before {
  content: "–";
  color: var(--cyan);
}

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

.page-faq .faq-qa__a {
  margin: 0 0 18px 30px;
  max-width: 38em;
  color: var(--dust);
  font-size: 15.5px;
  line-height: 1.78;
}

.page-faq .faq-qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 224, 208, .45);
}

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

/* ---------- 收尾 ---------- */
.page-faq .faq-block--end {
  position: relative;
  padding-bottom: 0;
}

.page-faq .faq-endline {
  height: 1px;
  margin-bottom: clamp(26px, 4vw, 44px);
  background: linear-gradient(90deg, transparent, var(--neon), var(--cyan), transparent);
  opacity: .8;
}

.page-faq .faq-support__actions {
  gap: 12px;
  margin: 24px 0 20px;
}

.page-faq .faq-support__note {
  margin: 0;
  max-width: 40em;
  color: var(--dust);
  font-size: 15px;
  line-height: 1.78;
}

.page-faq .faq-support__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 224, 208, .45);
}

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

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-index__link,
  .page-faq .faq-qa summary {
    transition: none;
  }
  .page-faq .faq-step:hover {
    transform: none;
  }
}