.page-faq {
  --faq-sticky: 84px;
  --faq-hair: rgba(31, 58, 51, 0.85);
  --faq-hair-soft: rgba(31, 58, 51, 0.5);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  margin-top: clamp(14px, 2.4vw, 26px);
  padding: clamp(24px, 4vw, 44px) clamp(18px, 3vw, 44px) clamp(22px, 3.4vw, 40px);
  background:
    linear-gradient(122deg, var(--ink-2) 0%, rgba(14, 20, 32, 0.45) 64%, rgba(43, 233, 123, 0.07) 100%);
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-lg);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 auto;
  width: min(46%, 520px);
  height: 100%;
  background: linear-gradient(150deg, transparent 42%, rgba(46, 140, 255, 0.12) 70%, rgba(43, 233, 123, 0.10) 100%);
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

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

.page-faq .faq-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 20ch;
  font-size: clamp(29px, 5.4vw, 54px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ice);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 24px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--faq-hair-soft);
  font-size: 14px;
  color: var(--mist);
}

.page-faq .faq-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
}

.page-faq .faq-hero__meta .data-mono {
  font-size: 18px;
  font-weight: 700;
  color: var(--neon);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 38px);
  padding-top: clamp(24px, 3.6vw, 42px);
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  background: var(--ink-2);
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-lg);
  padding: 18px 18px 20px;
}

.page-faq .faq-index__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  border-radius: 2px;
  text-decoration: none;
  color: var(--ice);
  font-size: 15px;
  font-weight: 600;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease), transform var(--ease);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  transition: color var(--ease);
}

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

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--neon);
  border-left-color: var(--neon);
  background: rgba(43, 233, 123, 0.07);
  transform: translateX(2px);
}

.page-faq .faq-index__link:hover .faq-index__num,
.page-faq .faq-index__link:focus-visible .faq-index__num {
  color: var(--blue);
}

.page-faq .faq-index__card {
  margin-top: 18px;
  padding: 14px 14px 16px;
  background: rgba(7, 9, 13, 0.7);
  border: 1px solid var(--faq-hair-soft);
  border-top: 2px solid var(--orange);
  border-radius: var(--radius);
}

.page-faq .faq-index__card-title {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ice);
}

.page-faq .faq-index__card-text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-index__card-text a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-index__mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--faq-hair-soft);
}

.page-faq .faq-index__mail .data-mono {
  font-size: 12.5px;
  color: var(--neon);
  word-break: break-all;
}

/* ---------- 内容分组 ---------- */
.page-faq .faq-block {
  margin-bottom: clamp(34px, 5.4vw, 60px);
  scroll-margin-top: 96px;
}

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

.page-faq .faq-block__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--faq-hair);
}

.page-faq .faq-block__num {
  flex: none;
  min-width: 42px;
  padding: 5px 8px;
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  color: var(--neon);
  background: rgba(43, 233, 123, 0.08);
  border: 1px solid var(--edge);
  border-radius: 3px;
}

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

.page-faq .faq-block__title {
  margin: 0;
  font-size: clamp(20px, 2.7vw, 28px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-faq .faq-block__note {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 三步走 ---------- */
.page-faq .faq-steps {
  counter-reset: faqstep;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  padding: 16px 16px 18px;
  background: var(--ink-2);
  border: 1px solid var(--faq-hair);
  border-top: 3px solid var(--neon);
  border-radius: var(--radius);
}

.page-faq .faq-steps li::before {
  content: "STEP 0" counter(faqstep);
  display: block;
  margin-bottom: 9px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--blue);
}

.page-faq .faq-steps__title {
  margin: 0 0 7px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--ice);
}

.page-faq .faq-steps__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 对照表 ---------- */
.page-faq .faq-table-wrap {
  margin-bottom: 22px;
  overflow-x: auto;
  background: var(--ink-2);
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-faq .faq-table caption {
  padding: 14px 16px 0;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--faq-hair-soft);
  vertical-align: top;
}

.page-faq .faq-table thead th {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--blue);
  border-bottom-color: var(--faq-hair);
}

.page-faq .faq-table tbody td {
  color: var(--mist);
  line-height: 1.7;
}

.page-faq .faq-table tbody td:first-child {
  color: var(--ice);
  font-weight: 600;
  white-space: nowrap;
}

.page-faq .faq-table tbody tr:last-child td {
  border-bottom: none;
}

.page-faq .faq-table tbody tr:hover {
  background: rgba(43, 233, 123, 0.06);
}

/* ---------- 图 ---------- */
.page-faq .faq-media {
  margin: 0 0 22px;
}

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

/* ---------- 问答折叠 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-hair-soft);
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 4px 16px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ice);
  transition: color var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  flex: none;
  width: 22px;
  margin-top: 1px;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  text-align: center;
  color: var(--neon);
  transition: transform var(--ease), color var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "–";
  color: var(--orange);
}

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

.page-faq .faq-item__a {
  padding: 0 40px 18px 0;
  border-left: 2px solid rgba(43, 233, 123, 0.35);
  padding-left: 16px;
  margin-bottom: 6px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 72ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-item__a a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 窄屏到宽屏 ---------- */
@media (max-width: 639px) {
  .page-faq .faq-block__head {
    flex-direction: column;
    gap: 10px;
  }

  .page-faq .faq-item__q {
    padding-right: 0;
    font-size: 15.5px;
  }

  .page-faq .faq-item__a {
    padding-right: 0;
  }

  .page-faq .faq-hero__meta {
    gap: 8px 18px;
  }
}

@media (min-width: 640px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq {
    --faq-sticky: 96px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 258px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
  }

  .page-faq .faq-split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: clamp(20px, 2.4vw, 30px);
    align-items: start;
  }

  .page-faq .faq-split__figure {
    margin-bottom: 0;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 372px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after {
    transition: none;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    transform: none;
  }
}